/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Yellow-Green with Light Blue Palette */
    --primary-color: #84cc16;
    --primary-dark: #65a30d;
    --primary-light: #a3e635;
    --secondary-color: #22c55e;
    --accent-color: #38bdf8;
    --accent-blue: #0ea5e9;
    
    /* Refined Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* Sophisticated Backgrounds */
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --bg-gradient-start: #f8fafc;
    --bg-gradient-end: #f1f5f9;
    
    /* Elegant Borders */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Premium Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -1px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -2px rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    
    /* Gradient Overlays - Yellow-Green to Light Blue */
    --gradient-primary: linear-gradient(135deg, #84cc16 0%, #22c55e 50%, #38bdf8 100%);
    --gradient-hero: linear-gradient(135deg, #a3e635 0%, #84cc16 30%, #22c55e 60%, #38bdf8 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(56, 189, 248, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    max-width: 1000px;
    margin: 0 auto 2rem;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

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

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Pipeline Section */
.pipeline-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
}

.pipeline-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.pipeline-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.pipeline-step {
    background: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.pipeline-step:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--bg-white) 0%, rgba(37, 99, 235, 0.02) 100%);
}

.step-icon {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.75rem;
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--bg-light);
    transition: all 0.3s ease;
}

.pipeline-step:hover .step-icon {
    transform: translateX(-50%) scale(1.1);
    box-shadow: 0 8px 25px rgba(132, 204, 22, 0.5);
    background: var(--gradient-primary);
}

.pipeline-step h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    text-align: center;
}


/* Tooltip */
.pipeline-step::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: rgba(31, 41, 55, 0.95);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.6;
    white-space: normal;
    width: 280px;
    max-width: 90vw;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    text-align: left;
}

.pipeline-step::after {
    content: '';
    position: absolute;
    bottom: calc(100% + 5px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    border: 8px solid transparent;
    border-top-color: rgba(31, 41, 55, 0.95);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 1001;
}

.pipeline-step:hover::before,
.pipeline-step:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Responsive tooltip positioning */
@media (max-width: 768px) {
    .pipeline-step::before {
        width: calc(100vw - 40px);
        left: 50%;
        transform: translateX(-50%) translateY(10px);
    }
    
    .pipeline-step:hover::before {
        transform: translateX(-50%) translateY(0);
    }
}

.pipeline-image {
    margin-top: 2rem;
    text-align: center;
}

.pipeline-image img {
    width: 100%;
    max-width: 1200px;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.pipeline-image img:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Dataset Section */
.dataset-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.dataset-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--gradient-primary);
    color: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.dataset-image {
    margin-top: 3rem;
    text-align: center;
}

.dataset-image img {
    width: 100%;
    max-width: 1200px;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.dataset-image img:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.benchmark-image {
    margin-top: 3rem;
    text-align: center;
}

.benchmark-image img {
    width: 100%;
    max-width: 1200px;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.benchmark-image img:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Leaderboard Section */
.leaderboard-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.leaderboard-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.75rem 2rem;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    color: var(--text-primary);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.leaderboard-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
    color: var(--text-primary);
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.leaderboard-table-wrapper {
    position: relative;
}

.leaderboard-table-container {
    max-height: 550px;
    overflow-y: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    background: var(--bg-white);
    /* Show approximately 10-12 rows, rest scrollable */
}

.leaderboard-table-container::-webkit-scrollbar {
    width: 8px;
}

.leaderboard-table-container::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 4px;
}

.leaderboard-table-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.leaderboard-table-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.leaderboard-table {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
}

.leaderboard-table table {
    position: relative;
}

.leaderboard-table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--gradient-primary);
    color: white;
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

tbody tr:hover {
    background: var(--bg-light);
}

tbody tr.top-1 {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 215, 0, 0.05));
    border-left: 4px solid #ffd700;
}

tbody tr.top-1:hover {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 215, 0, 0.1));
}

tbody tr.top-2 {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.15), rgba(192, 192, 192, 0.05));
    border-left: 4px solid #c0c0c0;
}

tbody tr.top-2:hover {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.2), rgba(192, 192, 192, 0.1));
}

tbody tr.top-3 {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.15), rgba(205, 127, 50, 0.05));
    border-left: 4px solid #cd7f32;
}

tbody tr.top-3:hover {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.2), rgba(205, 127, 50, 0.1));
}

.medical-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-blue));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    margin-left: 0.5rem;
    vertical-align: middle;
    box-shadow: 0 2px 4px rgba(34, 197, 94, 0.3);
}

.rank-change {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-left: 0.5rem;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    vertical-align: middle;
}

.rank-change.up {
    color: #22c55e;
    background: rgba(34, 197, 94, 0.1);
}

.rank-change.down {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.rank-change.unchanged {
    color: var(--text-secondary);
    background: rgba(100, 116, 139, 0.1);
}

td {
    padding: 1rem;
    color: var(--text-primary);
}

.details-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.details-link:hover {
    text-decoration: underline;
}

/* Evaluation Section */
.evaluation-section {
    padding: 5rem 0;
}

.evaluation-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.evaluation-step {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.evaluation-step h3 {
    margin-top: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.evaluation-step p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

pre {
    background: #1f2937;
    color: #f9fafb;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-top: 1rem;
}

code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Download Section */
.download-section {
    padding: 5rem 0;
    background: var(--bg-light);
}

.download-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.download-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #65a30d 0%, #22c55e 50%, #0ea5e9 100%);
}

.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--bg-white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    border: 2px solid var(--primary-color);
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

/* Paper Section */
.paper-section {
    padding: 5rem 0;
}

.citation-box {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.citation-box pre {
    background: var(--bg-white);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .pipeline-steps {
        grid-template-columns: 1fr;
    }

    .dataset-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .leaderboard-tabs {
        gap: 0.5rem;
    }

    .tab-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .leaderboard-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    table {
        font-size: 0.85rem;
    }

    th, td {
        padding: 0.75rem 0.5rem;
    }

    .medical-badge {
        font-size: 0.65rem;
        padding: 0.15rem 0.4rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background: var(--primary-color);
    color: white;
}