* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nata Sans', sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

.qp-shell {
    width: 84%;
    max-width: 1500px;
    margin: 0 auto;
    padding: 18px 20px 30px;
}

.analysis-create-page {
    --analysis-control-panel-width: 506px;
    --analysis-chapter-panel-width: 493px;
    --analysis-panel-gap: 40px;
    --analysis-panels-combined-width: calc(var(--analysis-control-panel-width) + var(--analysis-chapter-panel-width) + var(--analysis-panel-gap));
    --analysis-book-info-inline-padding: 22px;
}

.upgrade-banner {
    background: linear-gradient(135deg, #5d4037 0%, #6d4c41 100%);
    color: white;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(93, 64, 55, 0.2);
}

.btn-upgrade {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.btn-upgrade:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Upload Section */
.upload-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    margin: 0 auto 30px;
    max-width: 50%;
    transition: all 0.3s ease;
}

.analysis-create-page #book-info-section {
    max-width: 100%;
    margin-bottom: 18px;
    padding: 18px var(--analysis-book-info-inline-padding);
}

.analysis-create-page #create-workflow-section {
    width: 100%;
    max-width: 100%;
    margin-bottom: 30px;
    margin-left: auto;
    margin-right: auto;
    padding: 14px var(--analysis-book-info-inline-padding) 16px;
}

.analysis-create-page #create-workflow-section.create-workflow-section-bottom {
    margin-top: 72px;
    margin-bottom: 18px;
}

.analysis-create-page #create-workflow-section.is-dissolved {
    opacity: 0;
    transform: translateY(8px);
    filter: blur(3px);
    pointer-events: none;
    max-height: 0;
    min-height: 0;
    margin-top: 0;
    margin-bottom: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
}

.analysis-page-inline-title {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0;
    margin: 0 auto 6px;
    color: #5d4037;
    font-size: 1.344rem;
    font-weight: 600;
    line-height: 1.32;
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    overflow-wrap: anywhere;
}

.analysis-page-instruction {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 0 auto 14px;
    color: #5f6368;
    font-size: 0.74rem;
    font-weight: 400;
    line-height: 1.45;
}

.analysis-generate-link,
.analysis-generate-link:visited,
.analysis-generate-link:hover,
.analysis-generate-link:focus {
    color: #0066CC;
    font-weight: 700;
    text-decoration: none;
}

.generation-auth-success {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 0 auto 14px;
    padding: 10px 14px;
    border: 1px solid #b7dfc4;
    border-radius: 10px;
    background: #edf9f0;
    color: #1f6f3c;
    font-size: 0.92rem;
    font-weight: 600;
}

.create-workflow-title {
    margin: 0 0 10px;
    text-align: center;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: #8f98a5;
    line-height: 1.2;
}

.create-workflow-title-mobile {
    display: none;
}

.create-workflow-title-subject {
    color: #5e6f86;
    font-weight: 700;
}

.create-workflow-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    white-space: nowrap;
}

.create-workflow-line-mobile {
    display: none;
}

.create-workflow-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 10px 18px;
    border-radius: 12px;
    border: 1px solid #8ea0b8;
    background: #ffffff;
    color: #475569;
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.2;
}

.create-workflow-arrow {
    color: rgb(102, 122, 156);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.96rem;
    line-height: 1;
}

.analysis-create-page #book-info-section .book-info-content {
    gap: 16px;
}

.upload-section.processing {
    max-width: 100%;
}

.upload-section h2 {
    color: #5d4037;
    margin-bottom: 10px;
    font-size: 1.8rem;
    font-weight: 600;
}

.upload-section p {
    color: #666;
    margin-bottom: 20px;
}

/* Book info section with cover images */
.book-info-content {
    display: flex;
    align-items: center;
    gap: 25px;
}

.book-info-workflow-tabs {
    display: flex;
}

/* Match /c/... workflow buttons to homepage workflow style */
.book-info-workflow-tabs .context-workflow-tab {
    min-height: 31px;
    min-width: 148px;
    padding: 6px 14px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(34, 54, 86, 0.12);
    background: rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(1px);
}

.book-info-workflow-tabs .context-workflow-tab--current {
    color: #737f90;
    border-color: #d3d9e1;
    background: rgba(255, 255, 255, 0.28);
}

.book-info-workflow-tabs .context-workflow-tab--link.context-workflow-tab--ghost,
.book-info-workflow-tabs .context-workflow-tab--link.context-workflow-tab--ghost:visited {
    color: #3f5878;
    border-color: #6d83a2;
    background: rgba(255, 255, 255, 0.45);
}

.book-info-workflow-tabs .context-workflow-tab--link.context-workflow-tab--ghost:hover,
.book-info-workflow-tabs .context-workflow-tab--link.context-workflow-tab--ghost:focus-visible {
    color: #2d4462;
    border-color: #587092;
    background: rgba(255, 255, 255, 0.72);
}

.book-info-workflow-tabs .context-workflow-tab--link.context-workflow-tab--filled,
.book-info-workflow-tabs .context-workflow-tab--link.context-workflow-tab--filled:visited {
    color: #ffffff;
    border-color: #355a8f;
    background: #355a8f;
}

.book-info-workflow-tabs-desktop {
    margin-left: auto;
    align-self: flex-end;
}

.book-info-workflow-tabs-mobile {
    display: none;
    margin-top: 16px;
}

.analysis-create-page #book-info-section .book-info-content,
.handnote-editor-shell #handnote-book-info .book-info-content {
    align-items: flex-start;
    gap: 18px;
}

.analysis-create-page #book-info-section .book-info-text,
.handnote-editor-shell #handnote-book-info .book-info-text {
    flex: 1 1 auto;
    min-width: 0;
}

.book-covers-stack {
    position: relative;
    height: 120px;
    min-width: 120px;
    display: flex;
    align-items: center;
}

.book-cover-image {
    position: absolute;
    height: 120px;
    width: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid #fff;
}

/* Stack multiple book covers with overlap */
.book-cover-image:nth-child(1) {
    left: 0;
    z-index: 3;
}

.book-cover-image:nth-child(2) {
    left: 30px;
    z-index: 2;
}

.book-cover-image:nth-child(3) {
    left: 60px;
    z-index: 1;
}

.book-cover-image:nth-child(4) {
    left: 90px;
    z-index: 0;
}

/* Hover effect - lift on hover */
.book-cover-image:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
    z-index: 10 !important;
}

/* Adjust container width based on number of books */
.book-covers-stack:has(.book-cover-image:nth-child(2)) {
    min-width: 150px;
}

.book-covers-stack:has(.book-cover-image:nth-child(3)) {
    min-width: 180px;
}

.book-covers-stack:has(.book-cover-image:nth-child(4)) {
    min-width: 210px;
}

.book-info-text {
    flex: 1;
}

.book-info-text h2 {
    margin-bottom: 10px;
}

.book-info-text p {
    margin-bottom: 0;
}

.analysis-create-page #book-info-section .book-info-text h2 {
    font-size: 1.04rem;
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 6px;
}

.analysis-create-page #book-info-section .book-info-summary {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.analysis-create-page #book-info-section .book-info-line {
    display: block;
    color: #374151;
    font-size: 0.81rem;
    font-weight: 400;
    line-height: 1.35;
}

.book-info-summary .book-info-grade,
.book-info-summary .book-info-subject {
    display: inline;
}

.book-info-summary .book-info-divider {
    display: inline;
}

.upload-box {
    border: 3px dashed #ddd;
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.upload-box:hover {
    border-color: #5d4037;
    background-color: #f9f7f6;
    transform: translateY(-2px);
}

.upload-box.dragover {
    border-color: #5d4037;
    background-color: #f0ebe9;
    transform: scale(1.02);
}

.upload-box input[type="file"] {
    display: none;
}

.upload-label {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    color: #666;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.upload-label:hover {
    color: #5d4037;
}

.upload-label i {
    font-size: 3rem;
    color: #5d4037;
    opacity: 0.7;
}

.sample-upload-container {
    display: none;
    animation: slideDown 0.3s ease-out;
}

.sample-upload-container.show {
    display: block;
}

.add-sample-btn {
    background: transparent;
    border: 2px dashed #ccc;
    color: #666;
    padding: 15px 20px;
    border-radius: 10px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.add-sample-btn:hover {
    border-color: #5d4037;
    color: #5d4037;
    background-color: #f9f7f6;
}

.btn-upload {
    background: linear-gradient(135deg, #5d4037 0%, #6d4c41 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 20px auto 0;
    box-shadow: 0 4px 15px rgba(93, 64, 55, 0.3);
}

.btn-upload:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(93, 64, 55, 0.4);
}

.btn-upload:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.spinner {
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Question Types Loading State */
.question-types-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: #6c757d;
}

.question-types-loading .loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e9ecef;
    border-top: 3px solid #5d4037;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

.question-types-loading p {
    font-size: 1rem;
    color: #495057;
    margin-bottom: 5px;
}

.question-types-loading small {
    font-size: 0.85rem;
    color: #868e96;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        max-height: 500px;
        transform: translateY(0);
    }
}

/* Main Content Area */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    display: none;
}

.main-content.show {
    display: grid;
}

.main-content.generation-controls-frozen .control-panel> :not(#question-settings-slot):not(#question-generation-actions-slot),
.main-content.generation-controls-frozen #question-generation-actions-slot .generation-actions> :not(.generation-startup-eta-slot),
.main-content.generation-controls-frozen .chapter-panel {
    opacity: 0.62;
    filter: grayscale(0.18);
    pointer-events: none;
    user-select: none;
}

.main-content.generation-controls-frozen .control-panel> :not(#question-settings-slot):not(#question-generation-actions-slot) *,
.main-content.generation-controls-frozen #question-generation-actions-slot .generation-actions> :not(.generation-startup-eta-slot) *,
.main-content.generation-controls-frozen .chapter-panel * {
    cursor: wait !important;
}

.main-content.generation-controls-frozen .generation-startup-eta-slot {
    opacity: 1;
    filter: none;
    pointer-events: auto;
    user-select: text;
}

@media (min-width: 768px) {
    .main-content.show {
        grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
    }

    .main-content.question-generation-layout.show {
        grid-template-columns: minmax(0, 1fr) minmax(320px, 380px);
    }
}

@media (min-width: 992px) {
    .qp-shell:not(.analysis-create-page) .main-content.show {
        grid-template-columns: minmax(448px, 532px) minmax(0, 1fr);
    }

    .qp-shell:not(.analysis-create-page) .main-content.question-generation-layout.show {
        grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    }
}

@media (min-width: 992px) {
    .analysis-create-page #book-info-section {
        width: var(--analysis-panels-combined-width);
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

    .analysis-create-page #book-info-section .book-info-content {
        width: 100%;
        max-width: 100%;
    }

    .analysis-create-page #book-info-section .book-info-text {
        flex: 1 1 auto;
        margin-top: 12px;
        text-align: left;
    }

    .analysis-create-page #create-workflow-section,
    .analysis-create-page .analysis-page-inline-title {
        width: var(--analysis-panels-combined-width);
        max-width: 100%;
    }

    .analysis-create-page .generation-auth-success {
        width: var(--analysis-panels-combined-width);
        max-width: 100%;
    }

    .analysis-create-page .main-content.show {
        width: var(--analysis-panels-combined-width);
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
        grid-template-columns: var(--analysis-control-panel-width) var(--analysis-chapter-panel-width);
        justify-content: flex-start;
        column-gap: var(--analysis-panel-gap);
        row-gap: 7px;
    }

    .analysis-create-page .main-content.question-generation-layout.show {
        grid-template-columns: var(--analysis-chapter-panel-width) var(--analysis-control-panel-width);
    }

    .qp-shell:not(.analysis-create-page) .main-content.question-generation-layout .chapter-list-container,
    .qp-shell:not(.analysis-create-page) .main-content.question-generation-layout .book-chapter-list {
        max-height: none !important;
        overflow-y: visible;
    }

    .analysis-create-page .editor-section {
        width: var(--analysis-panels-combined-width);
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
}

/* Chapter Selection */
.chapter-panel {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

.chapter-column {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.chapter-panel h3 {
    color: #5d4037;
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: 500;
}

.chapter-selection-message {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    margin-bottom: 0;
    padding: 0 14px;
    border-left: 3px solid #8f243b;
    border-radius: 8px;
    background: rgba(143, 36, 59, 0.08);
    color: #7a1630;
    font-size: 0.92rem;
    line-height: 1.45;
    transition: opacity 0.22s ease, max-height 0.22s ease, margin-bottom 0.22s ease, padding-top 0.22s ease, padding-bottom 0.22s ease;
}

.chapter-selection-message.visible {
    opacity: 1;
    max-height: 96px;
    margin-bottom: 14px;
    padding-top: 10px;
    padding-bottom: 10px;
}

.select-all-container {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    margin-bottom: 20px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.form-check-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #5d4037;
}

.form-check-label {
    cursor: pointer;
    font-weight: 500;
    color: #333;
}

.chapter-list {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 10px;
}

.chapter-list::-webkit-scrollbar {
    width: 6px;
}

.chapter-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.chapter-list::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

.chapter-list::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* New multi-book vertical layout */
.chapter-list-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 600px;
    /* Default, will be overridden by JS */
    overflow-y: auto;
    padding-right: 5px;
    transition: max-height 0.3s ease;
}

.chapter-list-container::-webkit-scrollbar {
    width: 6px;
}

.chapter-list-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.chapter-list-container::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

.chapter-list-container::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* Per-book chapter list with dynamic height */
.book-chapter-list {
    overflow-y: auto;
    padding-right: 8px;
    padding-left: 5px;
}

.book-chapter-list::-webkit-scrollbar {
    width: 5px;
}

.book-chapter-list::-webkit-scrollbar-track {
    background: #f8f9fa;
    border-radius: 3px;
}

.book-chapter-list::-webkit-scrollbar-thumb {
    background: #adb5bd;
    border-radius: 3px;
}

.book-chapter-list::-webkit-scrollbar-thumb:hover {
    background: #868e96;
}

/* Book-level select all styling */
.book-select-all {
    background: #e9ecef;
    padding: 10px 12px;
    margin-bottom: 10px;
    border-radius: 6px;
}

.book-select-all .form-check-label {
    font-size: 0.9rem;
    color: #495057;
}

.part-name {
    font-weight: bold;
    color: #5d4037;
    margin: 15px 0 10px 0;
    font-size: 1.1rem;
    padding-bottom: 5px;
    border-bottom: 2px solid #f0f0f0;
}

/* Control Panel */
.control-panel {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.question-generation-layout .control-panel {
    display: flex;
    flex-direction: column;
    align-self: start;
}

.control-panel h3 {
    color: #5d4037;
    margin-bottom: 18px;
    font-size: 1.2rem;
    font-weight: 500;
}

/* Model Group Selector */
.model-group-selector {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 25px;
    border: 1px solid rgba(31, 31, 33, 0.08);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.question-generation-layout .model-group-selector {
    border-radius: 10px;
    padding: 13px 15px;
    margin-bottom: 19px;
}

.question-generation-layout .model-group-label {
    margin-bottom: 8px;
    font-size: 0.84rem;
    gap: 6px;
}

.question-generation-layout .model-group-help {
    width: 15px;
    height: 15px;
    font-size: 0.62rem;
}

.question-generation-layout .model-group-slider input[type="range"] {
    height: 6px;
    margin-bottom: 7px;
}

.question-generation-layout .model-group-slider input[type="range"]::-webkit-slider-thumb {
    width: 16px;
    height: 16px;
}

.question-generation-layout .model-group-slider input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
}

.question-generation-layout .model-group-slider input[type="range"]::-moz-range-track {
    height: 6px;
}

.question-generation-layout .model-group-labels {
    margin-top: 3px;
}

.question-generation-layout .model-group-labels>span {
    padding: 3px 2px;
    font-size: 0.68rem;
}

.question-generation-layout .model-group-labels>span small {
    margin-top: 1px;
    font-size: 0.57rem;
}

.question-generation-layout .model-group-switch-row {
    grid-template-columns: minmax(96px, max-content) minmax(0, 110px) minmax(96px, max-content);
    gap: 8px;
}

.question-generation-layout .model-group-slider.model-group-slider-switch input[type="range"] {
    height: 17px;
}

.question-generation-layout .model-group-slider.model-group-slider-switch input[type="range"]::-moz-range-track {
    height: 17px;
}

.question-generation-layout .model-group-slider.model-group-slider-switch input[type="range"]::-webkit-slider-thumb {
    width: 21px;
    height: 21px;
}

.question-generation-layout .model-group-slider.model-group-slider-switch input[type="range"]::-moz-range-thumb {
    width: 21px;
    height: 21px;
}

.model-group-label {
    font-weight: 600;
    color: #26272a;
    margin-bottom: 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.model-group-help {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    margin-left: auto;
    border-radius: 50%;
    background: #2d2d2f;
    color: #ffffff;
    font-size: 0.72rem;
    line-height: 1;
    cursor: help;
}

.model-group-help::after {
    content: attr(data-tooltip);
    position: absolute;
    right: 0;
    bottom: calc(100% + 8px);
    width: min(240px, 70vw);
    padding: 8px 10px;
    border-radius: 8px;
    background: #1f1f21;
    color: #ffffff;
    font-size: 0.76rem;
    font-weight: 500;
    line-height: 1.35;
    opacity: 0;
    pointer-events: none;
    transform: translateY(4px);
    transition: opacity 0.16s ease, transform 0.16s ease;
    z-index: 12;
}

.model-group-help:hover::after,
.model-group-help:focus::after {
    opacity: 1;
    transform: translateY(0);
}

.model-group-slider {
    position: relative;
}

.model-group-select {
    width: 100%;
    border: 1px solid #c8cdd3;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 0.95rem;
    background: #fff;
    color: #3f312b;
}

.model-group-slider input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: #b7bec7;
    border-radius: 4px;
    box-shadow: inset 0 0 0 1px rgba(31, 31, 33, 0.18);
    outline: none;
    cursor: pointer;
    margin-bottom: 10px;
}

.model-group-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2d2d2f;
    cursor: pointer;
    box-shadow: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.model-group-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: none;
    box-shadow: none;
}

.model-group-slider input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2d2d2f;
    cursor: pointer;
    border: none;
    box-shadow: none;
}

.model-group-slider input[type="range"]::-moz-range-track {
    background: #b7bec7;
    height: 8px;
    border-radius: 4px;
}

.model-group-labels {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 4px;
    margin-top: 5px;
}

.model-group-labels>span {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 500;
    color: #4b4f57;
    padding: 6px 2px;
    border-radius: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
    flex: 1 1 0;
    min-width: 0;
}

.model-group-labels .model-group-name {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    line-height: 1.2;
    white-space: nowrap;
}

.model-group-labels .model-group-name .fa-lock {
    font-size: 0.576em;
    line-height: 1;
}

.model-group-labels>span small {
    display: block;
    font-size: 0.63rem;
    font-weight: 400;
    margin-top: 2px;
    color: #000000;
}

.model-group-labels>span.active {
    font-weight: 700;
}

.model-group-labels>span.is-locked {
    opacity: 0.78;
}

.model-group-labels .label-basic.active {
    background: rgba(45, 45, 47, 0.08);
    color: #1f1f21;
}

.model-group-labels .label-standard.active {
    background: rgba(45, 45, 47, 0.08);
    color: #1f1f21;
}

.model-group-labels .label-premium.active {
    background: rgba(45, 45, 47, 0.08);
    color: #1f1f21;
}

.model-group-switch-row {
    display: grid;
    grid-template-columns: minmax(110px, max-content) minmax(0, 120px) minmax(110px, max-content);
    align-items: center;
    gap: 10px;
    justify-content: center;
}

.model-group-slider.model-group-slider-switch {
    position: relative;
}

.model-group-slider.model-group-slider-switch input[type="range"] {
    height: 22px;
    border-radius: 999px;
    margin-bottom: 0;
    background: linear-gradient(90deg, #8a939e 0%, #2ea44f 100%);
    box-shadow: inset 0 0 0 1px rgba(20, 24, 30, 0.22);
}

.model-group-selector:not(.is-switch-on) .model-group-slider.model-group-slider-switch input[type="range"] {
    background: #9ea7b2;
}

.model-group-selector:not(.is-switch-on) .model-group-slider.model-group-slider-switch input[type="range"]::-moz-range-track {
    background: #9ea7b2;
}

.model-group-selector.is-switch-on .model-group-slider.model-group-slider-switch input[type="range"] {
    background: linear-gradient(90deg, #2ea44f 0%, #29b347 100%);
}

.model-group-selector.is-switch-on .model-group-slider.model-group-slider-switch input[type="range"]::-moz-range-track {
    background: linear-gradient(90deg, #2ea44f 0%, #29b347 100%);
}

.model-group-slider.model-group-slider-switch input[type="range"]::-moz-range-track {
    height: 22px;
    border-radius: 999px;
    background: linear-gradient(90deg, #8a939e 0%, #2ea44f 100%);
}

.model-group-slider.model-group-slider-switch input[type="range"]::-webkit-slider-thumb {
    width: 28px;
    height: 28px;
    border: 2px solid #ffffff;
    background: #1f2937;
}

.model-group-slider.model-group-slider-switch input[type="range"]::-moz-range-thumb {
    width: 28px;
    height: 28px;
    border: 2px solid #ffffff;
    background: #1f2937;
}

.model-group-labels {
    display: none;
}

.model-group-selector.is-multi-range .model-group-labels {
    display: flex;
}

#question-model-quality-selector .model-group-side-block {
    min-width: 110px;
    padding: 8px 6px;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
}

#question-model-quality-selector .model-group-side-block.active {
    background: rgba(45, 45, 47, 0.08);
}

#question-model-quality-selector .model-group-labels .model-group-name {
    font-size: 0.92rem;
    font-weight: 700;
}

#question-model-quality-selector .model-group-side-block .model-group-name {
    font-size: 0.92rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    white-space: nowrap;
}

#question-model-quality-selector .model-group-side-block .model-group-name .fa-lock {
    font-size: 0.8em;
    line-height: 1;
}

#question-model-quality-selector .model-group-side-block small {
    display: block;
    font-size: 0.684rem;
    font-weight: 400;
    margin-top: 3px;
}

/* Temperature Slider */
.temperature-selector {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 25px;
    border: 1px solid rgba(31, 31, 33, 0.08);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.question-difficulty-selector {
    margin: 18px 0;
    padding: 16px;
    border: 1px solid #e1e5ec;
    border-radius: 10px;
    background: #fff;
}

.question-difficulty-slider input[type="range"] {
    width: 100%;
    accent-color: #3667d6;
    cursor: pointer;
}

.question-difficulty-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    color: #687386;
    font-size: 13px;
}

.question-difficulty-labels span { cursor: pointer; }
.question-difficulty-labels span.active { color: #2455bd; font-weight: 700; }

.temperature-label {
    font-weight: 500;
    color: #26272a;
    margin-bottom: 12px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.temperature-label i {
    color: #6d4c41;
}

.temperature-slider-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.temp-bound {
    font-size: 0.75rem;
    color: #4b4f57;
    white-space: nowrap;
    min-width: 70px;
}

.temp-bound:first-child {
    text-align: right;
}

.temp-bound:last-child {
    text-align: left;
}

.temperature-slider {
    flex: 1;
    position: relative;
}

.temperature-slider input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: #b7bec7;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    box-shadow: inset 0 0 0 1px rgba(31, 31, 33, 0.18);
}

.temperature-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2d2d2f;
    cursor: pointer;
    box-shadow: none;
    transition: none;
}

.temperature-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: none;
    box-shadow: none;
}

.temperature-slider input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2d2d2f;
    cursor: pointer;
    border: none;
    box-shadow: none;
}

.temperature-tooltip {
    position: absolute;
    top: -35px;
    left: 15%;
    transform: translateX(-50%);
    background: rgba(93, 64, 55, 0.85);
    color: white;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, left 0.05s linear;
    white-space: nowrap;
}

.temperature-tooltip::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px 6px 0;
    border-style: solid;
    border-color: rgba(93, 64, 55, 0.85) transparent transparent transparent;
}

.temperature-slider:hover .temperature-tooltip,
.temperature-slider input[type="range"]:active+.temperature-tooltip,
.temperature-slider input[type="range"]:focus+.temperature-tooltip {
    opacity: 1;
}


.question-types-grid {
    display: grid;
    gap: 20px;
}

.question-type-card {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 20px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.question-type-card.active {
    border-color: #5d4037;
    background: #f9f7f6;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(93, 64, 55, 0.1);
}

.question-type-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.question-type-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: #333;
    min-width: 0;
}

.interchangeable-group-label {
    display: block;
    max-width: min(48ch, 100%);
    font-size: 0.92em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.analysis-term-selector {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 24px;
    width: 100%;
    margin: -2px 0 16px;
    padding: 4px 0 6px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: thin;
}

.analysis-term-option {
    position: relative;
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    margin: 0;
    padding: 4px 1px 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #5f5f5f;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
}

.analysis-term-option:hover {
    color: #111;
}

.analysis-term-option.is-selected {
    background: transparent;
    color: #111;
}

.analysis-term-option.is-selected::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 2px;
    left: 0;
    height: 2px;
    border-radius: 999px;
    background: #000;
}

.analysis-term-option input {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: 0;
    opacity: 0;
    pointer-events: none;
}

.analysis-term-option:focus-within {
    border-radius: 2px;
    outline: 2px solid rgba(0, 0, 0, 0.28);
    outline-offset: 3px;
}

.interchangeable-group-card .question-type-title {
    flex: 1 1 auto;
    overflow: hidden;
}

.interchangeable-group-card .question-type-slider-section {
    flex: 0 0 min(120px, 36%);
    min-width: 88px;
}

.interchangeable-options {
    display: grid;
    gap: 6px;
    min-width: 0;
    max-height: 126px;
    margin: 0 0 15px 28px;
    padding: 0 8px 0 0;
    border: 0;
    overflow-x: hidden;
    overflow-y: auto;
    scrollbar-gutter: stable;
}

.interchangeable-option {
    display: flex;
    align-items: center;
    gap: 9px;
    min-height: 36px;
    padding: 6px 8px;
    border-radius: 8px;
    color: #333;
    cursor: pointer;
}

.interchangeable-option:hover {
    background: rgba(93, 64, 55, 0.07);
}

.interchangeable-option span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.interchangeable-group-card:not(.active) .interchangeable-options {
    opacity: 0.55;
}

.interchangeable-group-card:not(.active) .interchangeable-option {
    cursor: not-allowed;
}

@media (max-width: 576px) {
    .interchangeable-group-card {
        padding: 16px;
    }

    .interchangeable-group-card .question-type-header {
        gap: 10px;
    }

    .interchangeable-options {
        margin-left: 22px;
    }
}

.question-count-badge {
    background: #5d4037;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    min-width: 40px;
    text-align: center;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 15px;
}

.slider {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: #ddd;
    outline: none;
    transition: background 0.3s ease;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #5d4037;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 8px rgba(93, 64, 55, 0.1);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #5d4037;
    cursor: pointer;
    border: none;
}

.slider-value {
    font-weight: 600;
    color: #5d4037;
    min-width: 30px;
    text-align: center;
}

.generation-options {
    border-top: 2px solid #f0f0f0;
    padding-top: 18px;
}

.generation-actions {
    margin-top: 12px;
    max-width: 100%;
    min-width: 0;
}

.generation-startup-eta-slot {
    --startup-eta-panel-height: 38px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    min-height: var(--startup-eta-panel-height);
    display: flex;
    align-items: flex-end;
    margin-top: 4px;
    overflow: hidden;
}

.generation-startup-eta-slot.has-visible-eta,
.generation-startup-eta-slot:has(.startup-eta-indicator.visible) {
    min-height: var(--startup-eta-panel-height);
}

.generation-actions .btn-generate {
    width: auto;
    min-width: 240px;
    margin-left: auto;
    margin-top: 6px;
}

.question-generation-layout #question-generation-actions-slot {
    margin-top: 10px;
    max-width: 100%;
    min-width: 0;
}

.question-generation-layout #question-generation-actions-slot .generation-actions {
    margin-top: 0;
}

.question-generation-layout #question-generation-actions-slot .btn-generate {
    width: 100%;
    min-width: 0;
    margin-left: 0;
}

.question-recommendations {
    width: var(--analysis-panels-combined-width);
    max-width: 100%;
    margin: 48px auto 0;
    padding-top: 22px;
    border-top: 1px solid #ded8d4;
}

.question-recommendations h2 {
    margin: 0;
    color: #3e2723;
    font-size: 1.05rem;
    font-weight: 600;
}

.question-recommendations-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: nowrap;
}

.share-on-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    margin-right: 8px;
}

.share-on-label {
    font-size: 0.78rem;
    color: #6d5147;
    white-space: nowrap;
    font-weight: 500;
}

.share-on-logo-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* Mobile: ~21px (40% of 64px × 0.82) */
.share-on-logo {
    width: 21px;
    height: 21px;
    object-fit: contain;
    display: block;
}

/* X logo: 20% smaller than the base */
.share-on-logo--x {
    width: 17px;
    height: 17px;
}

/* Desktop: ~26px (50% of 64px × 0.82) */
@media (min-width: 768px) {
    .share-on-logo {
        width: 26px;
        height: 26px;
    }
    .share-on-logo--x {
        width: 21px;
        height: 21px;
    }
}

.question-recommendation-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.question-recommendation-tile {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 58px;
    padding: 14px 16px;
    border: 1px solid #d7ccc8;
    border-radius: 10px;
    background: #fff;
    color: #3e2723;
    font-size: 0.92rem;
    font-weight: 500;
    line-height: 1.35;
    text-decoration: none;
    transition: border-color 0.18s ease, background-color 0.18s ease;
}

.question-recommendation-tile:hover,
.question-recommendation-tile:focus-visible {
    border-color: #6d4c41;
    background: #faf7f4;
}

.question-recommendation-tile i {
    flex: 0 0 auto;
    font-size: 0.78rem;
}

.generation-action-notice {
    display: none;
    width: min(100%, 520px);
    margin-left: auto;
    margin-top: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    line-height: 1.4;
    border: 1px solid transparent;
    text-align: left;
}

.generation-action-notice.visible {
    display: block;
}

.generation-action-notice.warning {
    background: #fff6d9;
    border-color: #ffd86b;
    color: #7a5a00;
}

.generation-action-notice.error {
    background: #fde6e8;
    border-color: #f7b5bc;
    color: #8d1f2d;
}

#chapter-panel-actions {
    margin-top: 0;
}

.chapter-panel-actions-outside {
    width: 100%;
    margin-top: 12px;
}

#chapter-panel-actions .generation-actions {
    margin-top: 0;
}

#question-settings-slot {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.options-grid {
    display: block;
    margin-bottom: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group-inline {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.form-group-inline .form-label {
    margin: 0;
}

.form-group-inline .form-select {
    max-width: 170px;
}

.form-group-compact .form-label {
    font-size: 0.88rem;
}

.form-group-compact .form-select {
    padding: 8px 10px;
    font-size: 0.9rem;
}

.form-label {
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

.form-select {
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.form-select:focus {
    outline: none;
    border-color: #5d4037;
    box-shadow: 0 0 0 3px rgba(93, 64, 55, 0.1);
}

.btn-generate {
    background: #111827;
    color: white;
    border: none;
    padding: 12px 22px;
    border-radius: 999px;
    font-size: 0.96rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
    width: 100%;
    max-width: 100%;
    height: 44px;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: none;
    box-sizing: border-box;
    /* Leave vertical room for descenders in Nata Sans and dynamic status labels. */
    line-height: 1.3;
}

.btn-generate #generate-text {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: inherit;
}

.btn-generate #generate-loading {
    width: 20px;
    height: 20px;
    flex: 0 0 20px;
    align-items: center;
    justify-content: center;
}

.btn-generate:hover:not(:disabled) {
    transform: none;
    box-shadow: none;
    background: #030712;
}

.btn-generate:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Editor Section */
.editor-section {
    grid-column: 1 / -1;
    background: white;
    border-radius: 15px;
    margin-top: 24px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: none;
}

.editor-section.show {
    display: block;
}

.editor-instance,
#editor1,
#editor2 {
    width: 100%;
    min-width: 0;
}

#editor1,
#editor2 {
    position: relative;
}

.question-render-cursor {
    position: absolute;
    width: 2px;
    min-height: 20px;
    background: #111827;
    border-radius: 1px;
    pointer-events: none;
    z-index: 20;
    opacity: 0;
}

.question-render-cursor.is-active {
    animation: question-render-cursor-blink 0.8s steps(1) infinite;
    opacity: 1;
}

@keyframes question-render-cursor-blink {

    0%,
    45% {
        opacity: 1;
    }

    46%,
    100% {
        opacity: 0.22;
    }
}

.editor-caution {
    margin: 0.35rem 0 1.05rem;
    color: #98a2b3;
    font-size: 0.78rem;
    line-height: 1.35;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.question-feedback {
    margin: 0.3rem 0 0.15rem;
    color: #a1a7b1;
    font-size: 0.7rem;
    line-height: 1.3;
}

.question-feedback-line {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.55rem;
}

.question-feedback-label {
    font-weight: 500;
}

.question-feedback-actions {
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
}

.question-feedback-icon {
    display: inline-flex;
    width: 1.65rem;
    height: 1.65rem;
    padding: 0;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: #aeb4bd;
    cursor: pointer;
    transition: color 0.18s ease, background-color 0.18s ease, opacity 0.18s ease;
}

.question-feedback-icon:hover:not(:disabled),
.question-feedback-icon:focus-visible,
.question-feedback-icon.is-selected {
    color: #343a40;
    background: #f0f1f3;
}

.question-feedback-icon:focus-visible {
    outline: 2px solid #7b8794;
    outline-offset: 1px;
}

.question-feedback-icon:disabled {
    cursor: default;
    opacity: 0.48;
}

.question-feedback-icon.is-selected:disabled {
    color: #2f343a;
    opacity: 1;
}

.question-feedback-comment-form {
    width: min(360px, 100%);
    margin: 0.25rem 0 0 auto;
    opacity: 0;
    transform: translateY(-3px);
}

.question-feedback-comment-form.is-open {
    animation: question-feedback-form-in 0.18s ease forwards;
}

.question-feedback-comment-form.is-closing {
    animation: question-feedback-form-out 0.18s ease forwards;
}

.question-feedback-comment {
    display: block;
    width: 100%;
    min-height: 3.4rem;
    resize: vertical;
    box-sizing: border-box;
    border: 1px solid #d6d9de;
    border-radius: 7px;
    padding: 0.45rem 0.55rem;
    color: #343a40;
    background: #fff;
    font: inherit;
    font-size: 0.76rem;
}

.question-feedback-comment:focus {
    border-color: #7b8794;
    outline: 2px solid rgba(123, 135, 148, 0.18);
}

.question-feedback-comment-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.55rem;
    margin-top: 0.25rem;
}

.question-feedback-submit {
    border: 1px solid #5f6873;
    border-radius: 6px;
    padding: 0.22rem 0.6rem;
    background: #fff;
    color: #454c55;
    font-size: 0.7rem;
    cursor: pointer;
}

.question-feedback-submit:hover:not(:disabled) {
    background: #454c55;
    color: #fff;
}

@keyframes question-feedback-form-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes question-feedback-form-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-3px);
    }
}

@media (min-width: 768px) {
    .editor-postscript {
        display: flex;
        align-items: flex-start;
        gap: 1rem;
    }

    .editor-postscript .editor-caution {
        order: 1;
        flex: 1 1 auto;
        min-width: 0;
    }

    .editor-postscript .question-feedback {
        order: 2;
        flex: 0 1 420px;
        min-width: 280px;
        margin-left: auto;
    }
}

.question-shortfall-notice {
    margin: 0 0 4px;
    padding: 6px 10px;
    border: 1px solid #6600CC;
    border-radius: 8px;
    color: #5b4b75;
    font-size: 0.84rem;
    line-height: 1.35;
    font-weight: 500;
}

.premium-tip-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 10px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(214, 176, 89, 0.5);
    background: rgba(255, 251, 236, 0.98);
    color: #5c4a20;
    font-size: 0.78rem;
    line-height: 1.35;
    opacity: 0;
    transform: translateY(5px);
    transition: opacity 0.24s ease, transform 0.24s ease;
}

#editor-container-2 {
    margin-top: 2rem;
}

@media (max-width: 400px) {
    #question-model-quality-selector .model-group-switch-row {
        grid-template-columns: minmax(70px, max-content) minmax(0, 92px) minmax(70px, max-content);
        gap: 6px;
    }

    #question-model-quality-selector .model-group-side-block {
        min-width: 68px;
        padding: 6px 4px;
    }

    #question-model-quality-selector .model-group-side-block .model-group-name {
        font-size: 0.78rem;
    }

    #question-model-quality-selector .model-group-side-block small {
        font-size: 0.68rem;
    }
}

.premium-tip-banner.visible {
    opacity: 1;
    transform: translateY(0);
}

.premium-tip-text {
    flex: 1 1 auto;
}

.premium-tip-link {
    color: #0066CC;
    font-weight: 700;
    text-decoration: none;
}

.analysis-create-page .analysis-page-instruction-banner {
    grid-column: 1 / -1;
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 7px 10px;
    border-radius: 8px;
    font-size: 0.8em;
}

.premium-tip-close {
    border: 0;
    background: transparent;
    color: #8b9098;
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 2px;
}

.editor-summary-slot {
    display: none;
    margin-top: 1.25rem;
}

.editor-summary-slot.show {
    display: block;
}

.editor-credit-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    background: #f8fafc;
    border: 1px solid #d9e2ec;
    color: #334155;
    font-size: 0.86rem;
}

.editor-summary-group {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.editor-credit-summary a {
    color: #1865f2;
    font-weight: 600;
    text-decoration: none;
}

@media (max-width: 640px) {
    .editor-credit-summary {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.6rem;
        font-size: 0.78rem;
    }

    .editor-summary-group {
        width: 100%;
    }
}

/* Reference Section */
.reference-section {
    display: none;
    /* Hidden by default */
    margin-top: 40px;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.reference-section h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

/* Paper heading in reference section */
.paper-heading {
    color: #3e2723;
    background: linear-gradient(135deg, #d7ccc8 0%, #bcaaa4 100%);
    padding: 10px 15px;
    border-radius: 8px;
    margin: 25px 0 15px 0;
    font-size: 1.3rem;
    font-weight: 600;
    border-left: 5px solid #5d4037;
}

.paper-heading-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 25px 0 15px 0;
}

.paper-heading-row .paper-heading {
    margin: 0;
    flex: 1 1 auto;
}

.heading-mobile {
    display: none;
}

.reference-section-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.reference-type-group {
    margin-bottom: 20px;
}

.mcq-answer-key-group {
    margin-bottom: 24px;
}

.mcq-answer-key-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

.mcq-answer-key-table td {
    border: 1px solid #c8b9ad;
    padding: 8px 10px;
    text-align: center;
    font-weight: 600;
}

.mcq-answer-key-table tr:first-child td {
    background: #f3ebe5;
    color: #4e342e;
}

.mcq-answer-key-table tr:last-child td {
    color: #1b5e20;
}

.answer-key-mobile-toggle-cell,
.answer-key-mobile-toggle {
    display: none;
}

.reference-type-group h2 {
    color: #5d4037;
    border-bottom: 2px solid #d7ccc8;
    padding-bottom: 5px;
    margin-bottom: 15px;
}

.reference-type-group h3 {
    color: #5d4037;
    border-bottom: 2px solid #d7ccc8;
    padding-bottom: 5px;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.reference-item {
    margin-bottom: 15px;
    padding-left: 10px;
    border-left: 3px solid #bcaaa4;
}

.reference-item p {
    margin: 5px 0;
}

.ref-question strong {
    color: #3e2723;
}

.advanced-settings {
    margin: 14px 0 0;
    border: 1px solid #ddd;
    border-radius: 10px;
    background: #faf7f4;
}

.advanced-settings summary {
    cursor: pointer;
    padding: 12px 14px;
    font-weight: 600;
    color: #4e342e;
    list-style: none;
}

.advanced-settings-chevron {
    display: inline-block;
    margin-right: 8px;
    transition: transform 0.18s ease;
}

.advanced-settings[open] .advanced-settings-chevron {
    transform: rotate(90deg);
}

.advanced-settings summary::-webkit-details-marker {
    display: none;
}

.advanced-settings-body {
    padding: 0 14px 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.advanced-settings-body .temperature-selector {
    margin: 0;
}

.generation-options .advanced-settings-body .question-font-weight-setting {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 12px;
    border: 1px solid #d7ccc8;
    border-radius: 8px;
    background: #fff;
}

.question-font-weight-setting .form-label {
    margin: 0;
    color: #3e2723;
}

.question-font-weight-control {
    display: flex;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    transform: translateY(4px);
}

.question-font-weight-setting label.settings-toggle {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    flex: 0 0 auto;
    gap: 0;
    margin: 0;
    cursor: pointer;
}

.question-font-weight-setting .settings-toggle input {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: 0;
    padding: 0;
    border: 0;
    opacity: 0;
    pointer-events: none;
}

.question-font-weight-setting .settings-toggle-track {
    display: block;
    position: relative;
    width: 55px;
    height: 19px;
    min-width: 55px;
    box-sizing: border-box;
    border: 2px solid #77706c;
    border-radius: 999px;
    background: #e4dfdc;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7);
    transition: background-color 0.18s ease, border-color 0.18s ease;
}

.question-font-weight-setting .settings-toggle-track::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 2px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.24);
    transition: transform 0.18s ease;
}

.question-font-weight-setting .settings-toggle input:checked~.settings-toggle-track {
    border-color: #3e2723;
    background: #5d4037;
}

.question-font-weight-setting .settings-toggle input:checked~.settings-toggle-track::after {
    transform: translateX(36px);
}

.question-font-weight-setting .settings-toggle input:focus-visible~.settings-toggle-track {
    outline: 3px solid rgba(93, 64, 55, 0.25);
    outline-offset: 2px;
}

.question-font-weight-setting .settings-toggle input:disabled~.settings-toggle-track {
    cursor: not-allowed;
    opacity: 0.55;
}

.question-font-weight-status-normal,
.question-font-weight-status-bold {
    color: #6b625d;
    font-size: 0.54rem;
    font-weight: 400;
    line-height: 1;
}

.question-font-weight-status-normal {
    margin-right: 1px;
}

.question-font-weight-status-bold {
    margin-left: 1px;
}

.question-font-weight-setting .settings-toggle input:checked~.question-font-weight-status-bold,
.question-font-weight-setting .settings-toggle input:not(:checked)~.question-font-weight-status-normal {
    color: #3e2723;
    font-weight: 700;
}

.question-font-weight-setting .settings-toggle input:checked~.question-font-weight-status-normal,
.question-font-weight-setting .settings-toggle input:not(:checked)~.question-font-weight-status-bold {
    color: #9a928d;
    font-weight: 400;
}

.ref-answer {
    color: #28a745;
    font-weight: bold;
}

.ref-source {
    font-size: 0.9em;
    color: #666;
}

.ref-clue {
    font-size: 0.9em;
    color: #888;
    font-style: italic;
}

/* Reference Image Styling */
.ref-image-wrapper {
    max-height: 70px;
    max-width: 640px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-top: 10px;
    transition: max-height 0.3s ease;
}

.ref-image-wrapper.expanded {
    max-height: none;
}

.ref-overlay-text {
    position: absolute;
    top: 15px;
    right: 10px;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 4px;
    border-radius: 4px;
    max-width: 400px;
    font-size: 0.5em;
    color: #333;
    pointer-events: none;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(2px);
    text-align: right;
}

.ref-image-wrapper::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.9));
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.ref-image-wrapper.expanded::after {
    opacity: 0;
}

.ref-image {
    width: 100%;
    display: block;
    height: auto;
}

/* Visual Question Image Styling (in Quill editor) */
.ql-editor img {
    max-width: 100%;
    max-height: 300px;
    height: auto;
    box-sizing: border-box;
    display: block;
    margin: 12px 0;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    break-inside: avoid;
}

/* Visual question container styling */
.ql-editor img+p {
    margin-top: 8px;
}

.ql-editor h2 {
    margin-top: 0;
    margin-bottom: 0.35em;
    line-height: 1.25;
}

.ql-editor .shortex-header-table {
    width: 100%;
    border: none !important;
    border-collapse: collapse;
    margin: 0;
}

.ql-editor .shortex-header-table td {
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
}

.ql-editor .shortex-question-table {
    width: min(100%, var(--shortex-question-table-max-width, 680px));
    max-width: var(--shortex-question-table-max-width, 680px);
    margin: 12px 0 12px 0;
    border-collapse: collapse;
    table-layout: fixed;
    font-size: 0.95rem;
}

.ql-editor .shortex-question-table caption {
    margin-bottom: 6px;
    font-style: italic;
    text-align: left;
}

.ql-editor .shortex-question-table td {
    border: 1px solid #b8b8b8;
    padding: 6px 8px;
    vertical-align: top;
    word-break: break-word;
}

.ql-editor .shortex-question-table tr:first-child td {
    background: #f6f3ef;
    font-weight: 600;
}

/* Ensure images don't break columns when 2-column layout is used */
@media print {
    .ql-editor img {
        max-height: 200px;
        page-break-inside: avoid;
    }

    .ql-editor .shortex-question-table {
        page-break-inside: avoid;
    }
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.editor-title {
    color: #5d4037;
    font-size: 1.4rem;
    font-weight: 600;
}

.editor-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-action {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-action.btn-primary {
    background: #5d4037;
    color: white;
}

.btn-action.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-action.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Facebook in-app browser PDF hint */
.fb-browser-pdf-hint {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: -10px;
    margin-bottom: 16px;
    padding: 10px 14px;
    border-radius: 8px;
    border-left: 3px solid #e0a82e;
    background: #fefce8;
    color: #78600d;
    font-size: 0.82rem;
    line-height: 1.45;
}

.fb-browser-pdf-hint i {
    flex-shrink: 0;
    margin-top: 2px;
    color: #d4940a;
}

.fb-browser-pdf-hint-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.fb-browser-pdf-hint-text strong {
    color: #5c4a06;
}

#editor {
    min-height: 500px;
    border: 2px solid #f0f0f0;
    border-radius: 8px;
}

/* Alert Messages */
.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-info {
    background: #e3f2fd;
    color: #0277bd;
    border-left: 4px solid #2196f3;
}

.alert-danger {
    background: #ffebee;
    color: #c62828;
    border-left: 4px solid #f44336;
}

.alert-success {
    background: #e8f5e8;
    color: #2e7d32;
    border-left: 4px solid #4caf50;
}

/* Placeholder text */
.placeholder-text {
    text-align: center;
    color: #999;
    font-style: italic;
    padding: 40px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 2px dashed #ddd;
}

/* Mobile Responsiveness */
@media (max-width: 767px) {
    .qp-shell {
        width: 100%;
        padding: 14px 12px 24px;
    }

    .upload-section {
        max-width: 100%;
        padding: 20px;
    }

    .analysis-create-page #create-workflow-section {
        width: 100%;
        max-width: 100%;
        padding: 10px 10px 12px;
        margin-bottom: 24px;
    }

    .analysis-page-inline-title {
        width: 100%;
        max-width: 100%;
        margin: 0 0 4px;
        padding: 0;
        font-size: 1.104rem;
        line-height: 1.36;
    }

    .analysis-page-instruction {
        width: 100%;
        max-width: 100%;
        margin: 0 0 14px;
        font-size: 0.7rem;
        line-height: 1.45;
    }

    .analysis-create-page .analysis-page-instruction-banner {
        font-size: 0.7em;
    }

    .create-workflow-title {
        margin-bottom: 8px;
        font-size: 0.66rem;
        letter-spacing: 0.06em;
    }

    .create-workflow-title-desktop {
        display: none;
    }

    .create-workflow-title-mobile {
        display: block;
    }

    .create-workflow-line-desktop {
        display: none;
    }

    .create-workflow-line-mobile {
        display: flex;
        gap: 5px;
    }

    .create-workflow-step {
        padding: 5px 8px;
        border-radius: 8px;
        min-height: 34px;
        font-size: 0.66rem;
        letter-spacing: 0;
    }

    .create-workflow-arrow {
        font-size: 0.74rem;
    }

    .book-info-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .book-covers-stack {
        align-self: center;
    }

    .book-info-text {
        width: 100%;
        text-align: center;
    }

    .analysis-create-page #book-info-section .book-info-content,
    .handnote-editor-shell #handnote-book-info .book-info-content {
        flex-direction: row;
        align-items: flex-end;
        gap: 12px;
    }

    .analysis-create-page #book-info-section .book-info-content {
        align-items: flex-start;
    }

    .analysis-create-page #book-info-section .book-covers-stack,
    .handnote-editor-shell #handnote-book-info .book-covers-stack {
        align-self: flex-end;
        height: 84px;
        min-width: 84px;
    }

    .analysis-create-page #book-info-section .book-covers-stack {
        align-self: flex-start;
    }

    .analysis-create-page #book-info-section .book-cover-image,
    .handnote-editor-shell #handnote-book-info .book-cover-image {
        height: 84px;
    }

    .analysis-create-page #book-info-section .book-cover-image:nth-child(2),
    .handnote-editor-shell #handnote-book-info .book-cover-image:nth-child(2) {
        left: 16px;
    }

    .analysis-create-page #book-info-section .book-cover-image:nth-child(3),
    .handnote-editor-shell #handnote-book-info .book-cover-image:nth-child(3) {
        left: 32px;
    }

    .analysis-create-page #book-info-section .book-cover-image:nth-child(4),
    .handnote-editor-shell #handnote-book-info .book-cover-image:nth-child(4) {
        left: 48px;
    }

    .analysis-create-page #book-info-section .book-covers-stack:has(.book-cover-image:nth-child(2)),
    .handnote-editor-shell #handnote-book-info .book-covers-stack:has(.book-cover-image:nth-child(2)) {
        min-width: 100px;
    }

    .analysis-create-page #book-info-section .book-covers-stack:has(.book-cover-image:nth-child(3)),
    .handnote-editor-shell #handnote-book-info .book-covers-stack:has(.book-cover-image:nth-child(3)) {
        min-width: 116px;
    }

    .analysis-create-page #book-info-section .book-covers-stack:has(.book-cover-image:nth-child(4)),
    .handnote-editor-shell #handnote-book-info .book-covers-stack:has(.book-cover-image:nth-child(4)) {
        min-width: 132px;
    }

    .analysis-create-page #book-info-section .book-info-text,
    .handnote-editor-shell #handnote-book-info .book-info-text {
        width: auto;
        text-align: left;
    }

    .analysis-create-page #book-info-section .book-info-text {
        margin-top: 6px;
    }

    .analysis-create-page #book-info-section .book-info-summary,
    .handnote-editor-shell #handnote-book-info .book-info-summary {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }

    .analysis-create-page #book-info-section .book-info-summary .book-info-grade,
    .analysis-create-page #book-info-section .book-info-summary .book-info-subject,
    .handnote-editor-shell #handnote-book-info .book-info-summary .book-info-grade,
    .handnote-editor-shell #handnote-book-info .book-info-summary .book-info-subject {
        display: block;
    }

    .analysis-create-page #book-info-section .book-info-summary .book-info-divider,
    .handnote-editor-shell #handnote-book-info .book-info-summary .book-info-divider {
        display: none;
    }

    .analysis-create-page #book-info-section .book-info-text h2,
    .handnote-editor-shell #handnote-book-info .book-info-text h2 {
        font-size: 0.86rem;
        line-height: 1.25;
        margin-bottom: 6px;
    }

    .analysis-create-page #book-info-section .book-info-text p,
    .handnote-editor-shell #handnote-book-info .book-info-text p {
        font-size: 0.84rem;
        line-height: 1.35;
    }

    .book-info-workflow-tabs-desktop {
        display: none;
    }

    .book-info-workflow-tabs-mobile {
        display: flex;
        margin-top: 16px;
    }

    .book-info-workflow-tabs-mobile .context-workflow-tabs {
        width: 100%;
        justify-content: flex-start;
        gap: 8px;
    }

    .analysis-create-page .book-info-workflow-tabs-mobile .context-workflow-tabs {
        justify-content: flex-end;
    }

    .book-title-thumbnail {
        height: 40px;
    }

    .book-title-text {
        font-size: 0.85rem;
    }

    .book-select-all-label {
        font-size: 0.75rem;
    }

    .upgrade-banner {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .main-content {
        gap: 20px;
    }

    .analysis-create-page #book-info-section {
        margin-bottom: 22px;
    }

    .analysis-create-page .main-content.show {
        row-gap: 8px;
    }

    .chapter-panel,
    .control-panel {
        padding: 16px;
    }

    .analysis-create-page .chapter-list-container,
    .analysis-create-page .book-chapter-list {
        max-height: none !important;
        overflow-y: visible;
        padding-right: 0;
    }

    .analysis-create-page .book-section {
        padding: 12px;
    }

    .chapter-panel h3,
    .control-panel h3 {
        font-size: 1rem;
        font-weight: 400;
        margin-bottom: 14px;
    }

    .temperature-selector {
        padding: 14px 14px;
        margin-bottom: 14px;
    }

    .temperature-label {
        display: block;
        font-size: 0.86rem;
        font-weight: 400;
        line-height: 1.35;
        margin-bottom: 8px;
    }

    .temperature-slider-wrapper {
        gap: 8px;
    }

    .temp-bound {
        min-width: 58px;
        font-size: 0.67rem;
    }

    .model-group-label {
        font-size: 0.86rem;
        font-weight: 400;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .generation-options .form-group {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
        gap: 8px;
    }

    .generation-options .form-label {
        margin: 0;
        font-size: 0.82rem;
        font-weight: 400;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .generation-options .form-select {
        max-width: 150px;
        font-size: 0.82rem;
        padding: 7px 8px;
    }

    .generation-actions .btn-generate {
        width: 100%;
        min-width: 0;
    }

    .generation-action-notice {
        width: 100%;
        margin-left: 0;
    }

    .chapter-panel-actions-outside {
        margin-top: 10px;
    }

    .question-recommendations {
        margin-top: 42px;
        padding-top: 18px;
    }

    .question-recommendation-links {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .question-recommendation-tile {
        min-height: 52px;
        padding: 12px 14px;
        font-size: 0.84rem;
    }

    .generation-startup-eta-slot {
        --startup-eta-panel-height: 38px;
        min-height: var(--startup-eta-panel-height);
    }

    .editor-actions {
        justify-content: center;
    }
}

/* Hide processed upload section */
.upload-section.hidden {
    display: none;
}

/* Nudge Section */
.nudge-section {
    font-size: 0.9em;
    background: #f9fafb;
    border-radius: 14px;
    padding: 14px;
    border: 1px solid #e5e7eb;
    box-shadow: none;
    margin-top: 0;
    display: none;
    /* Hidden by default, shown by JS */
}

.nudge-section.show {
    display: block;
}

.nudge-suggestions-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: nowrap;
}

.nudge-suggestions-container:empty {
    display: none;
}

.nudge-suggestion {
    background: #f1f3f5;
    padding: 6px 12px;
    /* Reduced top/bottom padding */
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.76em;
    /* Reduced font size */
    cursor: default;
    transition: opacity 0.3s ease;
    opacity: 1;
    width: 100%;
}

.nudge-section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
    margin-bottom: 2px;
}

.nudge-section-help {
    margin-bottom: 10px;
    color: #6b7280;
    font-size: 0.72rem;
    line-height: 1.35;
}

.nudge-suggestion.fading-out {
    opacity: 0;
}

.nudge-suggestion.fading-in {
    opacity: 0;
}

.nudge-text {
    color: #495057;
}

.nudge-actions {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.nudge-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1em;
    padding: 2px;
    line-height: 1;
}

.nudge-accept {
    color: #20c997;
    /* Lighter green */
}

.nudge-reject {
    color: #6b7280;
}

.nudge-input-container {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    position: relative;
}

.custom-nudge-input {
    flex-grow: 1;
    padding: 8px 12px;
    border: 2px solid #6b7280;
    border-radius: 8px;
    font-size: 0.7em;
    /* 30% smaller font */
    height: 26px;
    /* 30% smaller height */
}

.custom-nudge-input:focus {
    border-color: #374151;
    outline: 2px solid rgba(55, 65, 81, 0.16);
    outline-offset: 1px;
}

.analysis-create-page .nudge-input-container:not(.has-been-focused)::before {
    content: '';
    position: absolute;
    z-index: 2;
    top: 10px;
    left: 13px;
    width: 2px;
    height: 21px;
    border-radius: 1px;
    background: #374151;
    pointer-events: none;
    animation: custom-nudge-caret-blink 1s steps(1, end) infinite;
}

@keyframes custom-nudge-caret-blink {
    0%, 45% { opacity: 1; }
    46%, 100% { opacity: 0; }
}

.custom-nudge-validation-message {
    display: none;
    margin: -8px 0 12px;
    color: #b42318;
    font-size: 0.78rem;
    line-height: 1.35;
}

.custom-nudge-validation-message.show {
    display: block;
}

.custom-nudge-input.has-validation-error {
    border-color: #b42318;
}

.btn-gpay-style {
    background-color: transparent;
    border: 1px solid #5d4037;
    color: #5d4037;
    border-radius: 20px;
    font-weight: 600;
    padding: 0 20px;
}

.btn-gpay-style:hover {
    background-color: #f9f7f6;
}

.analysis-create-page .custom-nudge-input,
.analysis-create-page #add-nudge-btn {
    height: 41.6px;
}

.applied-nudges-area {
    border-top: 1px solid #e9ecef;
    padding-top: 15px;
}

.applied-nudge {
    background: #e8f5e9;
    color: #2e7d32;
    padding: 8px 12px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-right: 8px;
    margin-bottom: 8px;
    font-weight: 500;
}

.remove-nudge-btn {
    background: none;
    border: none;
    color: #6b7280;
    cursor: pointer;
    font-weight: bold;
}

/* Styles for Multi-Book and Segmented Layout */
.book-section {
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 10px;
    padding: 15px;
    transition: box-shadow 0.2s ease;
}

.book-section:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.book-section:last-child {
    margin-bottom: 0;
}

/* Book title header - single row layout with tall thumbnail */
.book-title-header {
    margin-bottom: 12px;
    padding: 6px 12px;
    background: linear-gradient(135deg, #5d4037 0%, #795548 100%);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(93, 64, 55, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 48px;
}

/* Thumbnail on left - tall to fill pane height */
.book-title-thumbnail {
    height: 48px;
    width: auto;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

/* Container for book name and select all on right */
.book-title-row {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    justify-content: center;
}

/* Book name text */
.book-title-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.2;
}

/* Select all checkbox row */
.book-select-all-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.book-select-all-row .form-check-input {
    width: 14px;
    height: 14px;
    cursor: pointer;
    accent-color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.7);
    background-color: rgba(255, 255, 255, 0.2);
    margin: 0;
}

.book-select-all-label {
    font-size: 0.8rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    margin: 0;
    user-select: none;
}

.segment-header {
    font-weight: 600;
    color: #6c757d;
    margin-top: 15px;
    margin-bottom: 10px;
    padding-left: 10px;
    font-size: 0.95rem;
}

.chapter-segment-group {
    margin-bottom: 6px;
}

.segment-navigation-row,
.chapter-navigation-row.standalone-chapter-row {
    min-height: 40px;
    margin-bottom: 6px;
    padding: 8px 10px;
    border: 1px solid #e5e7eb;
    border-radius: 7px;
    background: #f8fafc;
}

.segment-navigation-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chapter-navigation-row.standalone-chapter-row {
    padding-left: 44px;
}

.segment-toggle-button {
    display: inline-flex;
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: 5px;
    background: transparent;
    color: #5d4037;
    cursor: pointer;
}

.segment-toggle-button:hover {
    background: #ede7e3;
}

.segment-toggle-button:focus-visible {
    outline: 2px solid #795548;
    outline-offset: 2px;
}

.segment-toggle-button i {
    font-size: 0.75rem;
    transition: transform 0.18s ease;
}

.segment-toggle-button[aria-expanded="true"] i {
    transform: rotate(90deg);
}

.segment-checkbox-label {
    flex: 1;
    font-weight: 600;
    color: #4b342f;
}

.segment-page-number {
    margin-left: 4px;
    color: #6b7280;
    font-size: 0.88em;
    font-weight: 400;
}

.segment-chapter-list {
    margin: 2px 0 8px 21px;
    padding: 4px 0 1px 25px;
    border-left: 2px solid #e7ded9;
}

.segment-chapter-list[hidden] {
    display: none;
}

.chapter-navigation-row.segment-child-row {
    margin-bottom: 7px;
}

.chapter-navigation-row.segment-child-row .form-check-label {
    font-size: 90%;
}

.chapter-page-number {
    color: #666;
    font-size: 0.9em;
}

.chapter-disabled .chapter-page-number {
    color: #999;
}

.book-separator {
    height: 1px;
    background-color: #e9ecef;
    margin: 25px 0;
}

/* Progress Bar Styles */
.progress-container {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    margin: 25px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.progress-header h3 {
    color: #5d4037;
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

.progress-eta {
    color: #666;
    font-size: 0.9rem;
    font-weight: 400;
}

#eta-value {
    font-weight: 600;
    color: #5d4037;
    font-family: 'Courier New', Courier, monospace;
    display: inline-block;
    min-width: 60px;
    text-align: left;
}

.progress-bar-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.progress-bar {
    flex: 1;
    height: 40px;
    background: #f0f0f0;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #4CAF50, #8BC34A);
    border-radius: 20px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.progress-fill.overtime {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

.progress-percent {
    font-weight: 700;
    color: #5d4037;
    font-size: 1.1rem;
    font-family: 'Courier New', Courier, monospace;
    display: inline-block;
    min-width: 50px;
    text-align: right;
}

.progress-message {
    text-align: center;
    color: #999;
    font-size: 0.9rem;
    font-weight: 300;
    min-height: 20px;
    transition: opacity 0.3s ease;
}

/* Mobile responsiveness for progress bar */
@media (max-width: 767px) {
    .progress-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .progress-bar-wrapper {
        flex-direction: column;
        gap: 10px;
    }

    .progress-bar {
        width: 100%;
    }

    .progress-percent {
        align-self: flex-end;
    }
}

/* Authentication Message */
.auth-message {
    background: linear-gradient(135deg, #1865f2 0%, #1557d6 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(24, 101, 242, 0.2);
    animation: slideIn 0.3s ease-out;
}

.auth-message-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.auth-message-content i {
    font-size: 20px;
    opacity: 0.9;
}

.auth-message-content span {
    flex: 1;
    min-width: 200px;
    font-size: 16px;
}

.btn-auth-login {
    background-color: white;
    color: #1865f2;
    padding: 10px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid white;
}

.btn-auth-login:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments for auth message */
@media (max-width: 768px) {
    .auth-message-content {
        flex-direction: column;
        text-align: center;
    }

    .auth-message-content span {
        min-width: 100%;
    }
}

/* Toast Notification */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.toast {
    background: white;
    padding: 16px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: toastSlideIn 0.3s ease-out;
    border-left: 4px solid #dc3545;
}

.toast.success {
    border-left-color: #28a745;
}

.toast.info {
    border-left-color: #1865f2;
}

.toast.warning {
    border-left-color: #ffc107;
}

.toast.error {
    border-left-color: #dc3545;
}

.toast-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    color: #28a745;
}

.toast.info .toast-icon {
    color: #1865f2;
}

.toast.warning .toast-icon {
    color: #ffc107;
}

.toast.error .toast-icon {
    color: #dc3545;
}

.toast-content {
    flex: 1;
    color: #333;
    font-size: 14px;
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    font-size: 20px;
    color: #999;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    flex-shrink: 0;
}

.toast-close:hover {
    color: #333;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.toast.removing {
    animation: toastSlideOut 0.3s ease-out forwards;
}

@media (max-width: 768px) {
    .toast-container {
        top: 70px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* Homepage specific styles */
.home-subjects-section {
    padding: 48px 0 28px;
    background-color: #fff;
}

.home-container {
    width: 80%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-header-row {
    margin-bottom: 48px;
}

.grade-filter {
    width: 100%;
    margin-top: 24px;
}

.grade-filter-toggle {
    width: auto;
    min-height: 0;
    margin: 0;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #0066CC;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: color 0.2s ease;
}

.grade-filter-toggle:hover,
.grade-filter-toggle:focus-visible {
    background: transparent;
    color: #004f9e;
}

.grade-filter-toggle i {
    transition: transform 0.2s ease;
}

.grade-filter-toggle.is-expanded i {
    transform: rotate(90deg);
}

.grade-filter-links {
    width: calc(100% - 22px);
    margin: 14px 0 0 22px;
    display: grid;
    grid-template-columns: repeat(8, minmax(0, 1fr));
    gap: 14px;
}

.grade-filter-links[hidden] {
    display: none;
}

.grade-filter-link {
    min-height: 32px;
    padding: 4px 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #ccd5e1;
    border-radius: 10px;
    background: #fff;
    color: #1e293b;
    font-weight: 700;
    text-decoration: none;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.grade-filter-link:hover,
.grade-filter-link:focus-visible {
    color: #0f172a;
    border-color: #0f172a;
    background: #f8fafc;
}

.home-workflow-links {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
    margin-bottom: 0;
}

.home-workflow-link {
    min-height: 31px;
    min-width: 148px;
    padding: 6px 14px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(34, 54, 86, 0.12);
    background: rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(1px);
}

.section-title {
    font-family: 'Nata Sans', sans-serif;
    font-size: clamp(1.35rem, 1.75vw, 1.95rem);
    color: #3e2723;
    font-weight: 700;
    margin: 0 0 24px;
    letter-spacing: -0.02em;
    line-height: 1.25;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
}

/* Enhanced Expandable '+' Button */
.btn-add-book-icon {
    background: #007bff;
    /* Primary Blue */
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    /* Rounded rectangular */
    text-decoration: none;
    transition: all 0.5s ease;
    /* Slower transition */
    padding: 10px 12px;
    min-width: 45px;
    /* Ensure icon is visible */
    height: 40px;
    overflow: hidden;
    white-space: nowrap;
    color: white;
}

.btn-add-book-icon:hover {
    box-shadow: 0 8px 20px rgba(0, 123, 255, 0.5);
    background: #0069d9;
    /* Darker Blue on hover */
    padding: 10px 20px;
    min-width: 220px;
}

.btn-add-book-icon i {
    font-size: 1.4rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    min-width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.btn-text {
    font-size: 1rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-weight: 700;
    opacity: 0;
    max-width: 0;
    margin-left: 0;
    transition: opacity 0.5s ease 0.1s, max-width 0.5s ease, margin-left 0.5s ease;
    overflow: hidden;
}

.btn-add-book-icon:hover .btn-text {
    opacity: 1;
    max-width: 200px;
    margin-left: 10px;
}

/* Reuse existing subject grid styles but ensure they work here */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

#home-subject-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 250px));
    column-gap: 25px;
    row-gap: calc(25px * 1.3);
    justify-content: space-between;
}

@media (min-width: 1400px) {
    .home-subjects-section .home-container {
        width: 72%;
    }

    #home-subject-grid {
        grid-template-columns: repeat(4, minmax(250px, 250px));
        column-gap: 25px;
        row-gap: calc(25px * 1.3);
        justify-content: space-between;
    }
}

.subject-grid-rows {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.subject-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
    aspect-ratio: 16/9;
}

.subject-card:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.subject-card.subject-card-hidden {
    display: none;
}

.subject-grid.subject-grid-expanded .subject-card.subject-card-hidden {
    display: block;
}

.home-upload-inline-cta {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    margin: 8px 0 10px;
}

.home-upload-inline-cta-inner {
    width: min(70%, 980px);
    min-height: 84px;
    border-radius: 14px;
    border: 1px solid #0f172a;
    background: transparent;
    color: #0f172a;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 20px;
}

.home-upload-inline-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1.04rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: #0f172a;
}

.home-upload-inline-text i {
    font-size: 0.95rem;
}

.home-upload-inline-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 38px;
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid #0f172a;
    background: transparent;
    color: #0f172a;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.home-upload-inline-btn:hover {
    color: #ffffff;
    background: #0f172a;
}

.subject-image-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.subject-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: filter 0.3s ease;
}

.home-subjects-section .subject-image-container img {
    filter: grayscale(100%);
}

.home-subjects-section .subject-card:hover,
.home-subjects-section .subject-card:focus-visible {
    transform: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.home-subjects-section .subject-card:hover .subject-image-container img,
.home-subjects-section .subject-card:focus-visible .subject-image-container img {
    filter: grayscale(0%);
}

.subject-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: 20px 15px 10px;
}

.subject-title {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.english-version-section {
    padding-top: 82px;
}

.english-version-heading {
    max-width: 680px;
    margin-bottom: 40px;
}

.english-version-eyebrow {
    margin: 0 0 8px;
    color: #60748f;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.english-version-heading .section-title {
    margin-bottom: 10px;
}

.english-version-intro,
.english-version-handnote-heading>p:last-child {
    margin: 0;
    color: #5c6675;
    font-size: 0.96rem;
    line-height: 1.6;
}

.english-version-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 250px));
    column-gap: 25px;
    row-gap: calc(25px * 1.3);
    justify-content: space-between;
}

.english-version-card {
    display: flex;
    flex-direction: column;
    aspect-ratio: auto;
    border: 1px solid rgba(63, 88, 120, 0.12);
}

.english-version-card-main {
    display: block;
    position: relative;
    min-height: 0;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    color: inherit;
    text-decoration: none;
}

.english-version-card-copy {
    height: 100%;
    display: flex;
    align-items: flex-end;
    padding: 18px;
    background: linear-gradient(145deg, #edf2f7, #dce5ef);
}

.english-version-card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 11px 13px;
    border-top: 1px solid #e7ebf0;
}

.english-version-card-actions a {
    color: #405a7a;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1.25;
    text-decoration: none;
}

.english-version-card-actions a:hover,
.english-version-card-actions a:focus-visible {
    color: #152f50;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.english-version-empty {
    grid-column: 1 / -1;
    color: #5c6675;
}

@media (min-width: 1400px) {
    .english-version-section .home-container {
        width: 72%;
    }

    .english-version-grid {
        grid-template-columns: repeat(4, minmax(250px, 250px));
        column-gap: 25px;
        row-gap: calc(25px * 1.3);
        justify-content: space-between;
    }
}

.english-version-handnote {
    width: min(1040px, calc(100% - 40px));
    margin: 54px auto 80px;
}

.english-version-handnote-heading {
    max-width: 680px;
    margin-bottom: 30px;
}

.english-version-handnote-heading h1 {
    margin: 0 0 10px;
    color: #263b56;
    font-family: 'Nata Sans', sans-serif;
    font-size: clamp(1.55rem, 3vw, 2.35rem);
    line-height: 1.2;
}

.english-version-handnote-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 16px;
}

.english-version-handnote-option {
    display: flex;
    min-height: 164px;
    flex-direction: column;
    padding: 22px;
    border: 1px solid #d9e1ea;
    border-radius: 14px;
    background: #fff;
    color: inherit;
    text-decoration: none;
    box-shadow: 0 5px 18px rgba(35, 52, 73, 0.07);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.english-version-handnote-option:hover,
.english-version-handnote-option:focus-visible {
    transform: translateY(-2px);
    border-color: #879bb5;
    box-shadow: 0 10px 25px rgba(35, 52, 73, 0.11);
}

.english-version-handnote-grade {
    color: #263b56;
    font-size: 1.08rem;
    font-weight: 800;
}

.english-version-handnote-year {
    margin-top: 6px;
    color: #69778a;
    font-size: 0.82rem;
}

.english-version-handnote-action {
    margin-top: auto;
    color: #405a7a;
    font-size: 0.78rem;
    font-weight: 800;
}

.english-version-handnote-action i {
    margin-left: 5px;
    font-size: 0.7rem;
}

.subject-grid-toggle {
    width: min(70%, 980px);
    margin: 20px auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 50px;
    padding: 10px 22px;
    border: 1px solid #0f172a;
    border-radius: 14px;
    background: transparent;
    color: #0f172a;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.subject-grid-toggle:hover {
    color: #ffffff;
    background: #0f172a;
    border-color: #0f172a;
}

.subject-grid-toggle i {
    transition: transform 0.25s ease;
}

.subject-grid-toggle.is-expanded i {
    transform: rotate(180deg);
}

/* Compact Quiz Steps */
.quiz-steps-container.compact-steps {
    padding: 30px 0;
    min-height: auto;
}

.compact-steps .steps-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.compact-steps .step-box {
    padding: 15px;
}

.compact-steps .step-number {
    width: 35px;
    height: 35px;
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.compact-steps .step-text {
    font-size: 1rem;
}

.compact-steps .final-instruction {
    margin-top: 20px;
    font-size: 1rem;
}

/* Create Question Button */
.create-question-section {
    text-align: center;
    padding: 20px 0 40px;
}

.btn-create-question {
    display: inline-block;
    background: #007bff;
    /* Primary Blue */
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    transition: all 0.3s ease;
}

.btn-create-question:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
    color: white;
    background: #0069d9;
    /* Darker Blue */
}

@media (max-width: 768px) {
    .home-subjects-section {
        padding: 36px 0 22px;
    }

    .section-header-row {
        margin-bottom: 36px;
    }

    .grade-filter {
        margin-top: 18px;
    }

    .grade-filter-toggle {
        width: auto;
        min-height: 0;
        padding: 0;
    }

    .grade-filter-links {
        width: calc(100% - 22px);
        margin: 14px 0 0 22px;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        column-gap: 10px;
        row-gap: 16px;
    }

    .grade-filter-link {
        min-height: 30px;
        padding: 3px 6px;
    }

    .home-workflow-links {
        justify-content: flex-end;
        flex-wrap: wrap;
        margin-bottom: 0;
    }

    .home-workflow-link {
        min-width: 136px;
    }

    .book-info-workflow-tabs .context-workflow-tab {
        min-width: 136px;
    }

    .section-title {
        font-size: 1.38rem;
        line-height: 1.35;
        margin-bottom: 20px;
        white-space: normal;
        display: block;
        -webkit-line-clamp: unset;
        -webkit-box-orient: initial;
        overflow: visible;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .subject-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 15px;
    }

    #home-subject-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 15px;
        justify-content: initial;
    }

    .english-version-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 15px;
        justify-content: initial;
    }

    .subject-grid-toggle {
        width: 100%;
        margin-top: 20px;
        padding: 16px 18px;
        border-radius: 14px;
    }

    .home-container {
        width: 100%;
        padding: 0 15px;
    }

    .english-version-section {
        padding-top: 58px;
    }

    .english-version-heading {
        margin-bottom: 28px;
    }

    .english-version-card-actions {
        align-items: flex-start;
        gap: 8px;
        padding: 9px 8px;
    }

    .english-version-card-actions a {
        font-size: 0.66rem;
    }

    .english-version-card-actions a:last-child {
        text-align: right;
    }

    .english-version-handnote {
        width: calc(100% - 30px);
        margin-top: 36px;
    }

    .english-version-handnote-options {
        grid-template-columns: 1fr;
    }

    .home-upload-inline-cta {
        margin: 6px 0 8px;
    }

    .home-upload-inline-cta-inner {
        width: 100%;
        min-height: 72px;
        padding: 12px 14px;
        gap: 10px;
    }

    .home-upload-inline-text {
        font-size: 0.9rem;
    }

    .home-upload-inline-btn {
        min-height: 34px;
        padding: 6px 12px;
        font-size: 0.82rem;
    }
}

/* Subjects Page Wide Layout */
.subjects-page-container {
    width: 100%;
    background-color: #fff;
    padding: 40px 0;
}

.subjects-content-wrapper {
    width: 80%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
}

.subjects-content-wrapper .page-header {
    text-align: center;
    margin-bottom: 40px;
}

.public-grade-page--overview .subjects-content-wrapper .page-header,
.legacy-grade-page .subjects-content-wrapper .page-header {
    text-align: left;
    margin-bottom: 48px;
}

.public-grade-page--overview .subjects-content-wrapper .page-header .header-text,
.legacy-grade-page .subjects-content-wrapper .page-header .header-text {
    flex: 1 1 100%;
    width: 100%;
    min-width: 0;
}

.subjects-content-wrapper .page-header.with-workflow-tabs {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 18px;
    text-align: left;
}

.subjects-content-wrapper .header-text h1 {
    font-size: 2.2rem;
    color: #3e2723;
    font-weight: 800;
    margin: 0 0 10px 0;
}

.subjects-content-wrapper .header-text p {
    font-size: 1.1rem;
    color: #666;
    margin: 0;
}

.subject-inline-upload-section {
    margin-top: 84px;
}

.grade-medium-group + .grade-medium-group {
    margin-top: 46px;
}

.grade-medium-heading {
    margin: 0 0 18px;
    color: #3e2723;
    font-size: 1.35rem;
    font-weight: 800;
    text-align: left;
}

.public-grade-page .subject-overlay .subject-year {
    margin: 4px 0 0;
    color: rgba(255, 255, 255, 0.94);
    font-size: 0.78rem;
    line-height: 1.25;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.55);
}

/* Ensure subject grid works in this context */
.subjects-content-wrapper .subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.grade-selection-page .subject-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 280px));
}

.grade-selection-page .subject-card {
    max-width: 280px;
}

.grade-workflow-card {
    display: flex;
    flex-direction: column;
    aspect-ratio: auto;
}

.grade-workflow-card-main {
    display: block;
    min-height: 0;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    color: inherit;
    text-decoration: none;
}

.grade-workflow-card .subject-overlay {
    top: 0;
    bottom: 0;
    background: linear-gradient(160deg, rgba(0, 0, 0, 0.62), transparent 48%),
        linear-gradient(340deg, rgba(0, 0, 0, 0.72), transparent 45%);
    padding: 12px 14px;
}

.grade-workflow-card .subject-title--grade {
    position: absolute;
    top: 12px;
    left: 14px;
    max-width: calc(100% - 28px);
}

.grade-workflow-card .subject-year {
    position: absolute;
    right: 14px;
    bottom: 10px;
    max-width: calc(100% - 28px);
    margin: 0;
    color: #fff;
    font-size: 0.65rem;
    font-weight: 500;
    line-height: 1.25;
    text-align: right;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.55);
}

@media (min-width: 1200px) {
    .subjects-content-wrapper .subject-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
    }
}

@media (min-width: 769px) {
    .subjects-content-wrapper .subject-grid.public-grade-workflow-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 280px));
        gap: 25px;
        justify-content: start;
    }

    .subjects-content-wrapper .subject-grid.public-grade-common-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 280px));
        gap: 20px;
        justify-content: start;
    }

    .public-grade-workflow-grid .subject-card,
    .public-grade-common-grid .subject-card {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 768px) {
    .subjects-content-wrapper {
        width: 100%;
        padding: 0 15px;
    }

    .subjects-content-wrapper .subject-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 15px;
    }

    .subjects-content-wrapper .page-header.with-workflow-tabs {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .public-grade-page--overview .subjects-content-wrapper .page-header,
    .legacy-grade-page .subjects-content-wrapper .page-header {
        margin-bottom: 36px;
    }

    .subjects-content-wrapper .header-text h1 {
        font-size: 1.6rem;
    }

    .subjects-content-wrapper .header-text p {
        font-size: 0.95rem;
    }

    .subject-inline-upload-section {
        margin-top: 64px;
    }

    .grade-medium-group + .grade-medium-group {
        margin-top: 34px;
    }

    .grade-medium-heading {
        margin-bottom: 14px;
        font-size: 1.18rem;
    }
}

/* ===== Streaming Progress Indicator ===== */
.startup-eta-indicator {
    display: none;
    background: #fff;
    border: 1px solid #d9e2f2;
    border-radius: 7px;
    padding: 5px 9px;
    margin-bottom: 0;
    box-shadow: 0 2px 10px rgba(13, 71, 161, 0.08);
    width: 100%;
    max-width: 100%;
    height: var(--startup-eta-panel-height, 56px);
    min-width: 0;
    box-sizing: border-box;
    overflow: hidden;
    opacity: 0;
    transform: scale(0.985);
    filter: blur(2px);
    transition: opacity 0.22s ease, transform 0.22s ease, filter 0.22s ease;
}

.startup-eta-indicator.visible {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
}

.startup-eta-indicator.startup-eta-transient .startup-eta-time,
.startup-eta-indicator.startup-eta-transient .startup-eta-bar-wrapper {
    display: none;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.startup-eta-indicator.startup-eta-estimating .startup-eta-time,
.startup-eta-indicator.startup-eta-estimating .startup-eta-bar-wrapper {
    display: none;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.startup-eta-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    margin-bottom: 2px;
    max-width: 100%;
    min-width: 0;
}

.startup-eta-indicator.startup-eta-transient .startup-eta-header,
.startup-eta-indicator.startup-eta-estimating .startup-eta-header {
    height: 100%;
    margin-bottom: 0;
}

.startup-eta-title {
    color: #0d47a1;
    font-size: 0.74rem;
    font-weight: 600;
    line-height: 1;
    flex: 1 1 auto;
    max-width: min(100%, 38ch);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.startup-eta-estimating .startup-eta-title,
.startup-eta-transient .startup-eta-title {
    max-width: 100%;
}

.startup-eta-time {
    color: #455a64;
    font-size: 0.7rem;
    font-weight: 500;
    display: inline-flex;
    align-items: baseline;
    flex: 0 0 auto;
    gap: 4px;
    line-height: 1;
}

.startup-eta-value {
    display: inline-block;
    min-width: 92px;
    text-align: left;
    font-family: 'Courier New', Courier, monospace;
    font-variant-numeric: tabular-nums;
}

.startup-eta-bar-wrapper {
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: 8px;
}

.startup-eta-bar {
    flex: 1;
    height: 3px;
    background: #edf2fb;
    border-radius: 999px;
    overflow: hidden;
}

.startup-eta-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #1e88e5 0%, #42a5f5 100%);
    border-radius: 999px;
    transition: width 0.25s linear;
}

.startup-eta-percent {
    min-width: 40px;
    text-align: right;
    color: #607d8b;
    font-size: 0.68rem;
    font-weight: 600;
    line-height: 1;
}

.stream-progress-indicator {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 1px solid #90caf9;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(33, 150, 243, 0.15);
    animation: fadeInSlide 0.3s ease-out;
}

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stream-progress-bar {
    flex: 1;
    height: 10px;
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.stream-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #1976d2 0%, #42a5f5 50%, #64b5f6 100%);
    border-radius: 5px;
    transition: width 0.4s ease;
    position: relative;
}

.stream-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg,
            transparent 0%,
            rgba(255, 255, 255, 0.3) 50%,
            transparent 100%);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    from {
        transform: translateX(-100%);
    }

    to {
        transform: translateX(100%);
    }
}

.stream-progress-text {
    font-size: 0.95rem;
    color: #1565c0;
    font-weight: 600;
    white-space: nowrap;
    min-width: 180px;
    text-align: right;
}

/* Streaming progress responsive */
@media (max-width: 576px) {
    .reference-section {
        padding: 14px 10px;
        overflow-x: hidden;
    }

    .reference-section h1 {
        font-size: 1.15rem;
        margin-bottom: 14px;
    }

    .reference-section .paper-heading-row {
        align-items: flex-start;
        gap: 8px;
    }

    .reference-section .paper-heading {
        padding: 8px 10px;
        border-radius: 7px;
        font-size: 0.94rem;
        line-height: 1.22;
        border-left-width: 4px;
    }

    .reference-section .paper-heading-answer-key {
        font-size: 0.86rem;
    }

    .paper-heading-answer-key .heading-full {
        display: none;
    }

    .paper-heading-answer-key .heading-mobile {
        display: inline;
    }

    .mcq-answer-key-group {
        max-width: 100%;
        overflow-x: hidden;
    }

    .mcq-answer-key-group.answer-key-expanded {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .mcq-answer-key-table {
        width: 100%;
        table-layout: fixed;
    }

    .mcq-answer-key-group.answer-key-expanded .mcq-answer-key-table {
        width: max-content;
        min-width: 100%;
        table-layout: auto;
    }

    .mcq-answer-key-table td {
        padding: 7px 4px;
        font-size: 0.82rem;
        overflow-wrap: anywhere;
    }

    .mcq-answer-key-group.answer-key-expanded .mcq-answer-key-table td {
        min-width: 34px;
        white-space: nowrap;
        overflow-wrap: normal;
    }

    .mcq-answer-key-group.has-mobile-answer-key-extra:not(.answer-key-expanded) .mobile-answer-key-extra {
        display: none;
    }

    .mcq-answer-key-group.answer-key-expanded .answer-key-mobile-toggle-cell {
        display: none;
    }

    .answer-key-mobile-toggle-cell {
        display: table-cell;
        width: 28px;
        min-width: 28px;
        padding: 0;
        background: #fff;
        vertical-align: middle;
    }

    .answer-key-mobile-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        min-height: 62px;
        padding: 0;
        border: 1px solid #c8b9ad;
        border-radius: 0;
        background: #fff;
        color: #5d4037;
        font-size: 1rem;
        font-weight: 700;
        line-height: 1;
        cursor: pointer;
    }

    .startup-eta-indicator {
        width: 100%;
    }

    .startup-eta-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 4px;
    }

    .startup-eta-bar-wrapper {
        width: 100%;
    }

    .startup-eta-title {
        font-size: 0.72rem;
    }

    .startup-eta-time {
        font-size: 0.68rem;
    }

    .startup-eta-value {
        min-width: 78px;
    }

    .stream-progress-indicator {
        flex-direction: column;
        gap: 12px;
        padding: 14px 16px;
    }

    .stream-progress-text {
        text-align: center;
        min-width: auto;
    }
}

/* Streaming generation active dot indicator */
.streaming-active-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    background-color: #4CAF50;
    border-radius: 50%;
    margin-left: 8px;
    animation: pulse-dot 1s ease-in-out infinite;
    vertical-align: middle;
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.6);
}

@keyframes pulse-dot {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
        box-shadow: 0 0 8px rgba(76, 175, 80, 0.6);
    }

    50% {
        transform: scale(1.3);
        opacity: 0.7;
        box-shadow: 0 0 16px rgba(76, 175, 80, 0.9);
    }
}

/* Container for streaming dot indicator */
.streaming-active-dot-container {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: linear-gradient(135deg, #f8fff8 0%, #e8f5e9 100%);
    border: 1px solid #c8e6c9;
    border-radius: 8px;
    margin-top: 12px;
    font-size: 14px;
    color: #2e7d32;
    font-weight: 500;
    animation: fade-in 0.3s ease;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================
   DISABLED CHAPTERS STYLES
   ========================================= */

.chapter-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    position: relative;
}

.chapter-disabled .chapter-checkbox:disabled {
    cursor: not-allowed;
}

.chapter-disabled .disabled-label {
    color: #999 !important;
    cursor: not-allowed;
}

.chapter-disabled .disabled-icon {
    margin-left: 8px;
    color: #dc3545;
    font-size: 0.8em;
    opacity: 0.7;
}

/* Tooltip styling for disabled chapters */
.chapter-disabled[title] {
    position: relative;
}

.chapter-disabled:hover::after {
    content: attr(title);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: calc(100% + 5px);
    background: rgba(51, 51, 51, 0.95);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    z-index: 100;
    pointer-events: none;
    animation: tooltip-fade-in 0.2s ease;
    max-width: 280px;
    white-space: normal;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.chapter-disabled:hover::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: calc(100% + 2px);
    border: 5px solid transparent;
    border-top-color: rgba(51, 51, 51, 0.95);
    z-index: 100;
}

@keyframes tooltip-fade-in {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* =========================================
   CONSTRAINED QUESTION TYPE STYLES
   ========================================= */

.question-type-card.constrained-disabled {
    opacity: 0.5;
    pointer-events: none;
    border-color: #dee2e6 !important;
    background: #f8f9fa !important;
    box-shadow: none !important;
    transform: none !important;
}

.question-type-card.constrained-disabled .question-type-checkbox {
    cursor: not-allowed;
}

.question-type-card.constrained-disabled .slider {
    cursor: not-allowed;
    opacity: 0.5;
}

.question-type-card.constrained-disabled::after {
    content: "No matching chapters selected";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(108, 117, 125, 0.9);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.question-type-card.constrained-disabled {
    position: relative;
}

.question-type-card.constrained-disabled:hover::after {
    opacity: 1;
    pointer-events: auto;
}

/* =========================================
   GENERATION WARNING ALERT
   ========================================= */

.generation-warning {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff3cd 0%, #ffeeba 100%);
    border: 1px solid #ffc107;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(255, 193, 7, 0.25);
    animation: fadeInSlide 0.3s ease-out;
}

.generation-warning .warning-content {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    color: #856404;
    font-size: 14px;
}

.generation-warning .warning-content i {
    font-size: 20px;
    color: #d39e00;
}

.generation-warning .retry-btn {
    white-space: nowrap;
    border-color: #856404;
    color: #856404;
}

.generation-warning .retry-btn:hover {
    background: #856404;
    color: white;
}

/* Highlight pulse animation for retry button target */
@keyframes highlight-pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(93, 64, 55, 0.4);
    }

    50% {
        box-shadow: 0 0 0 15px rgba(93, 64, 55, 0);
    }
}

.highlight-pulse {
    animation: highlight-pulse 0.5s ease-in-out 3;
}

@media (max-width: 576px) {
    .generation-warning {
        flex-direction: column;
        text-align: center;
    }

    .generation-warning .warning-content {
        flex-direction: column;
    }
}

/* Visual Analysis Status Indicator */
.visual-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    font-weight: 500;
}

.visual-status.processing {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    color: #1565c0;
    border: 1px solid #90caf9;
}

.visual-status.complete {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.visual-status.failed {
    background: linear-gradient(135deg, #fce4ec 0%, #f8bbd9 100%);
    color: #c62828;
    border: 1px solid #f48fb1;
}

.visual-status.timeout {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    color: #e65100;
    border: 1px solid #ffcc80;
}

.visual-status i {
    font-size: 1.1rem;
}

.visual-status span {
    flex: 1;
}

.question-archive-readonly .archive-disabled-ui,
.question-archive-readonly .question-type-card,
.question-archive-readonly .book-section,
.question-archive-readonly .generation-options,
.question-archive-readonly .nudge-section,
.question-archive-readonly .temperature-selector,
.question-archive-readonly .model-group-selector {
    opacity: 0.6;
    filter: grayscale(0.2);
}

.question-archive-readonly .question-type-card,
.question-archive-readonly .book-section {
    background: #f4f6f9;
}

.question-archive-readonly input,
.question-archive-readonly select {
    cursor: not-allowed;
}