:root {
    --body-font: sans-serif;
}

/* Example Index Styles */
.example-index {
    margin: 20px 0 40px 0;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.index-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
}

.index-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background-color: white;
    border: 3px solid #dee2e6;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100px;
    height: 75px;
    text-align: center;
    overflow: hidden;
}

.index-btn:hover {
    border-color: #007bff;
    transform: translateY(-2px) scale(1.15);
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.2);
}

.index-btn.active {
    border-color: #007bff;
    background-color: #e7f3ff;
    box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
    transform: scale(1.15);
}

.index-btn img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    border-radius: 4px;
}

.index-btn span {
    display: none;
}

/* Example Content Styles */
.example-content {
    display: none;
}

.example-content.active {
    display: block;
}

.caption {
    text-align: center;
    font-style: italic;
}

/* Caption containers in video grids should match video dimensions and behavior */
.paper__section-grid .caption {
    width: 100%;
    aspect-ratio: 832 / 480; /* Hardcoded */
    overflow-y: auto;
    overflow-x: hidden;
    text-align: left;
    padding: 12px;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    background-color: #fafafa;
    font-size: 14px;
    line-height: 1.4;
    box-sizing: border-box;
    display: flex;
    align-items: flex-start;
}

/* Ensure text containers in grid behave like videos */
.paper__section-grid > div > .caption {
    height: auto;
    min-height: 0;
}

.subcaption {
    text-align: center;
}

/* Generic styles for expandable content buttons */
.toggle-expandable {
    display: block;
    margin: 12px auto;
    padding: 8px 16px;
    color: #224b8d;
    background-color: rgba(34, 75, 141, 0.08);
    border: 1px solid #224b8d;
    border-radius: 6px;
    cursor: pointer;
    max-width: 140px;
    width: 100%;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
}

.toggle-expandable:hover {
    background-color: rgba(34, 75, 141, 0.15);
    border-color: #1a3a73;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(34, 75, 141, 0.2);
}

.toggle-expandable:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(34, 75, 141, 0.3);
}

.expandable-content {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.expandable-content.show {
    display: block;
    opacity: 1;
}

/* Example divider styles */
.example-divider {
    margin: 2rem 0;
    border: none;
    height: 1px;
    /* background: #ddd; */
    background: linear-gradient(to right, transparent, #ddd, transparent);
}

/* Comparison button styles */
.comparison-btn {
    padding: 10px 16px;
    margin: 5px;
    background-color: #f8f9fa;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #495057;
    transition: all 0.2s ease-in-out;
    min-width: 140px;
}

.comparison-btn:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.comparison-btn.active {
    background-color: #007bff;
    border-color: #007bff;
    color: white;
}

.comparison-btn.active:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

/* Comparison display styles */
#comparison-display {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Video control button styles */
.video-control-btn {
    padding: 12px 20px;
    margin: 8px;
    background-color: #28a745;
    border: 2px solid #28a745;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease-in-out;
    min-width: 160px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(40, 167, 69, 0.2);
}

.video-control-btn:hover {
    background-color: #218838;
    border-color: #1e7e34;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(40, 167, 69, 0.3);
}

.video-control-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(40, 167, 69, 0.4);
}

.video-control-btn.active {
    background-color: #dc3545;
    border-color: #dc3545;
    box-shadow: 0 2px 4px rgba(220, 53, 69, 0.2);
}

.video-control-btn.active:hover {
    background-color: #c82333;
    border-color: #bd2130;
    box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
}

/* Video container styles */
.video-container {
    margin: 20px 0;
    text-align: center;
}

.video-container video {
    width: 100%;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-container .video-label {
    margin-top: 12px;
    font-size: 16px;
    font-weight: 500;
    color: #333;
}

/* 修改：简单视频切换按钮样式 - 与comparison-btn保持一致 */
.simple-video-btn {
    padding: 10px 16px;
    margin: 5px;
    background-color: #f8f9fa;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #495057;
    transition: all 0.2s ease-in-out;
    min-width: 140px;
}

.simple-video-btn:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.simple-video-btn.active {
    background-color: #007bff;
    border-color: #007bff;
    color: white;
}

.simple-video-btn.active:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

/* Editing button styles - 专门为Video Editing部分设计 */
.editing-btn {
    padding: 10px 16px;
    margin: 5px;
    background-color: #f8f9fa;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #495057;
    transition: all 0.2s ease-in-out;
    min-width: 140px;
}

.editing-btn:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.editing-btn.active {
    background-color: #007bff;
    border-color: #007bff;
    color: white;
}

.editing-btn.active:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

/* 简单视频容器样式 */
.simple-video-container {
    margin: 20px 0;
    text-align: center;
}

.simple-video-container video {
    width: 100%;
    max-width: 600px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Beautiful Button Styles - 深灰色配色，大圆角细边框，无阴影 */
.beautiful-btn {
    display: inline-block;
    padding: 12px 24px;
    margin: 8px;
    border-radius: 16px;
    text-decoration: none;
    font-weight: normal;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 1px solid #004e98;
    background-color: #f5f5f5;
    color: #004e98;
    position: relative;
    overflow: hidden;
    min-width: 160px;
    text-align: center;
}

.beautiful-btn:hover {
    background-color: #004e98;
    color: #fff;
    transform: translateY(-2px);
}

.beautiful-btn:active {
    transform: translateY(0);
}

/* arXiv Button - 深灰色风格 */
.arxiv-btn {
    background-color: #fff;
    color: #004e98;
    border-color: #004e98;
}

.arxiv-btn:hover {
    background-color: #004e98;
    color: #fff;
    border-color: #004e98;
}

/* Code Button - 深灰色风格 */
.code-btn {
    background-color: #fff;
    color: #004e98;
    border-color: #004e98;
}

.code-btn:hover {
    background-color: #004e98;
    color: #fff;
    border-color: #004e98;
}

/* Apply 4px border radius to all videos and images */
video, img {
    border-radius: 4px;
}

/* 放大 paper__section-title 字体 */
.paper__section-title {
    font-size: 1.75rem !important; /* 从 1.25rem 增加到 1.75rem */
    
}

/* 响应式调整 */
@media (max-width: 768px) {
    .beautiful-btn {
        padding: 10px 20px;
        font-size: 14px;
        min-width: 140px;
    }
    
    .paper__section-grid {
        margin-left: 10% !important;
        margin-right: 10% !important;
    }
    
    .index-buttons {
        gap: 10px;
    }
    
    .index-btn {
        min-width: 100px;
        padding: 8px;
    }
    
    /* 移除固定尺寸，让图片占满按钮 */
    .index-btn img {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;
    }
    
    .index-btn span {
        font-size: 11px;
    }

    .paper__section-title {
        font-size: 1.5rem !important; /* 移动端稍微小一点 */
    }
}

/* BibTeX Section Styles */
.bibtex-container {
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.bibtex-container pre {
    background-color: transparent;
    color: #333;
    font-family: 'Courier New', 'Monaco', 'Menlo', monospace;
    font-size: 1rem;
    line-height: 1.3;
    margin: 0 0 1rem 0;
    padding: 0;
    border: none;
    border-radius: 0;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.bibtex-copy-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    background-color: #007bff;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 auto;
}

.bibtex-copy-btn:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
}

.bibtex-copy-btn:active {
    transform: translateY(0);
}

.bibtex-copy-btn.copied {
    background-color: #28a745;
}

.bibtex-copy-btn.copied:hover {
    background-color: #218838;
}

/* Responsive adjustments for BibTeX section */
@media (max-width: 768px) {
    .bibtex-container {
        padding: 1rem;
    }
    
    .bibtex-container pre {
        font-size: 0.9rem;
    }
}
:root {
    margin: 0 auto;
}

.bibtex-copy-btn:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
}

.bibtex-copy-btn:active {
    transform: translateY(0);
}

.bibtex-copy-btn.copied {
    background-color: #28a745;
}

.bibtex-copy-btn.copied:hover {
    background-color: #218838;
}

/* Responsive adjustments for BibTeX section */
@media (max-width: 768px) {
    .bibtex-container {
        padding: 1rem;
    }
    
    .bibtex-container pre {
        font-size: 0.9rem;
    }
}:root {