/* ===== CSS Variables & Theme ===== */
:root {
    /* Obsidian Dark Mode (default) */
    --bg-primary: #0a0a0c;
    --bg-secondary: #161618;
    --bg-tertiary: #1e1e20;
    --bg-hover: #2a2a2e;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --border-color: #2d2d30;

    /* Accent colors */
    --color-accent: #6366f1;
    --color-accent-2: #10b981;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #6366f1;
    --color-purple: #a855f7;

    /* Score colors */
    --score-excellent: #10b981;
    --score-good: #6366f1;
    --score-fair: #f59e0b;
    --score-poor: #ef4444;

    /* Font stacks */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Transitions */
    --transition-fast: 100ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

[data-theme="light"] {
    --bg-primary: #f4f4f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e4e4e7;
    --bg-hover: #d4d4d8;
    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-tertiary: #a1a1aa;
    --border-color: #d4d4d8;
    --color-info: #4f46e5;
    --color-accent: #4f46e5;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
    position: relative;
}

/* Scanline boot animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    z-index: 10000;
    animation: scanline 1.5s ease-out forwards;
    pointer-events: none;
}

@keyframes scanline {
    0% {
        top: 0;
        opacity: 1;
    }

    80% {
        opacity: 0.6;
    }

    100% {
        top: 100vh;
        opacity: 0;
    }
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.85;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    background: transparent;
}

select {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2371717a' d='M6 9L2 5h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
}

select:focus {
    border-color: var(--color-accent);
}

/* ===== Container ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Header ===== */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(22, 22, 24, 0.92);
}

[data-theme="light"] .header {
    background: rgba(255, 255, 255, 0.92);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    font-size: 1.125rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.025em;
}

.logo-icon {
    display: inline-flex;
    color: var(--color-accent);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
}

.version-badge {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.6875rem;
    font-weight: 500;
    font-family: var(--font-mono);
    border: 1px solid var(--border-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    transition: border-color var(--transition-fast);
    color: var(--text-secondary);
}

.theme-toggle:hover {
    border-color: var(--color-accent);
    color: var(--text-primary);
}

.sun-icon,
.moon-icon {
    transition: opacity var(--transition-fast);
}

.moon-icon {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

.github-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    color: var(--text-secondary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.github-link:hover {
    border-color: var(--color-accent);
    color: var(--text-primary);
    opacity: 1;
}

/* ===== Hero Section — Blueprint Grid ===== */
.hero {
    padding: 3.5rem 0 3rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    background:
        repeating-linear-gradient(0deg,
            transparent,
            transparent 19px,
            var(--border-color) 19px,
            var(--border-color) 20px),
        repeating-linear-gradient(90deg,
            transparent,
            transparent 19px,
            var(--border-color) 19px,
            var(--border-color) 20px);
    background-size: 20px 20px;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, transparent 0%, var(--bg-primary) 70%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content h2 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Bento Grid Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    max-width: 640px;
    margin: 0 auto;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.25rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border-color var(--transition-fast);
}

.stat:hover {
    border-color: var(--color-accent);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
    line-height: 1.1;
}

.stat-label {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 0.375rem;
}

/* Last Updated Badge */
.last-updated {
    margin-top: 1.75rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.update-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.update-time {
    font-size: 0.8125rem;
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-mono);
}

/* ===== How It Works Section ===== */
.how-it-works {
    padding: 3rem 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.how-it-works h2 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    letter-spacing: -0.025em;
}

.pipeline {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.pipeline-step {
    flex: 0 1 240px;
    text-align: center;
    position: relative;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.75rem 1.25rem 1.5rem;
    transition: border-color var(--transition-fast);
}

.pipeline-step:hover {
    border-color: var(--color-accent);
}

.step-number {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 1.5rem;
    height: 1.5rem;
    background: var(--color-accent);
    color: white;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
    font-family: var(--font-mono);
}

.step-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
    color: var(--color-accent);
}

.step-icon svg {
    width: 32px;
    height: 32px;
    stroke-width: 1.5;
}

.pipeline-step h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    letter-spacing: -0.015em;
}

.pipeline-step p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.5;
}

.pipeline-arrow {
    display: flex;
    align-items: center;
    color: var(--text-tertiary);
    flex-shrink: 0;
    font-size: 1.25rem;
}

.pipeline-arrow svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.5;
}

@media (max-width: 768px) {
    .pipeline {
        flex-direction: column;
        align-items: center;
    }

    .pipeline-arrow {
        transform: rotate(90deg);
    }
}

/* ===== Methodology Section ===== */
.methodology-section {
    padding: 3rem 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.methodology-section h2 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.methodology-intro {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 2.5rem;
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (max-width: 768px) {
    .methodology-grid {
        grid-template-columns: 1fr;
    }
}

.methodology-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color var(--transition-fast);
}

.methodology-card:hover {
    border-color: var(--color-accent);
}

.methodology-card-icon {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
    color: var(--color-accent);
}

.methodology-card-icon svg {
    width: 22px;
    height: 22px;
    stroke-width: 1.5;
}

.methodology-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.015em;
}

.methodology-card p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.metric-explainer {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.metric-item {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border-left: 2px solid var(--color-accent);
}

.metric-name {
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.metric-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.matching-steps {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
    padding-left: 1.25rem;
    margin: 0.5rem 0;
}

.matching-steps li {
    margin-bottom: 0.375rem;
}

.matching-score {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-style: italic;
}

.fairness-list {
    list-style: none;
    padding: 0;
}

.fairness-list li {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.fairness-list li:last-child {
    border-bottom: none;
}

.configurable-note {
    display: inline-block;
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

.methodology-footer {
    text-align: center;
    margin-top: 1.5rem;
}

.methodology-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-accent);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.625rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: border-color var(--transition-fast);
}

.methodology-link:hover {
    border-color: var(--color-accent);
    opacity: 1;
}

.methodology-link svg {
    width: 16px;
    height: 16px;
    stroke-width: 1.5;
}

/* ===== Performance Trends Section ===== */
.trends-section {
    padding: 3rem 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.trends-section h2 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.025em;
}

.trends-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
    align-items: start;
}

.trend-chart-wrapper {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
}

.trend-chart-wrapper h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

#f1-trend-chart {
    max-height: 300px;
}

.trend-summary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
}

.trend-summary h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.trend-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.trend-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.625rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.trend-tool-name {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.trend-change {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.trend-change.positive {
    color: var(--color-success);
}

.trend-change.negative {
    color: var(--color-error);
}

.trend-change.neutral {
    color: var(--text-tertiary);
}

.trend-arrow {
    font-size: 0.75rem;
}

@media (max-width: 768px) {
    .trends-container {
        grid-template-columns: 1fr;
    }
}

.no-data {
    text-align: center;
    color: var(--text-tertiary);
    font-style: italic;
    padding: 2rem 1rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    margin: 1rem 0;
    font-size: 0.875rem;
}

/* ===== Contribute CTA ===== */
.contribute-cta {
    padding: 3rem 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-content {
    text-align: center;
}

.cta-text h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.cta-text p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.cta-button:hover {
    background: var(--color-accent);
    color: #ffffff;
    opacity: 1;
}

.cta-button svg {
    margin-right: 0.5rem;
}

/* ===== Main Content ===== */
.main-content {
    padding: 2.5rem 0;
    min-height: 60vh;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.tab-btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-tertiary);
    position: relative;
    transition: color var(--transition-fast);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 1.5;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--color-accent);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

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

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

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

/* ===== Leaderboard ===== */
.leaderboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.leaderboard-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.metric-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.metric-selector label {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}

.leaderboard-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.leaderboard-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: border-color var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.leaderboard-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.leaderboard-item:nth-child(1)::before {
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
    opacity: 1;
}

.leaderboard-item:nth-child(2)::before {
    background: linear-gradient(90deg, var(--color-accent), transparent);
    opacity: 0.6;
}

.leaderboard-item:nth-child(3)::before {
    background: linear-gradient(90deg, var(--color-accent), transparent);
    opacity: 0.3;
}

.leaderboard-item:hover {
    border-color: var(--color-accent);
}

.rank {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-tertiary);
    min-width: 2.5rem;
    text-align: center;
}

.rank.gold {
    color: var(--color-accent);
}

.rank.silver {
    color: var(--text-secondary);
}

.rank.bronze {
    color: var(--text-tertiary);
}

.tool-info {
    flex: 1;
}

.tool-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.tool-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    align-items: center;
}

.tool-meta svg {
    width: 12px;
    height: 12px;
    stroke-width: 1.5;
    vertical-align: -1px;
    margin-right: 2px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.75rem;
}

.metric {
    text-align: center;
}

.metric-value {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    display: block;
    margin-bottom: 0.125rem;
}

.metric-label {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-highlighted {
    background: var(--bg-tertiary);
    border-radius: 6px;
    padding: 0.375rem;
    position: relative;
    border: 1px solid var(--border-color);
}

.metric-highlighted::after {
    content: '▾';
    position: absolute;
    top: 0.15rem;
    right: 0.35rem;
    font-size: 0.5rem;
    color: var(--color-accent);
}

/* ===== Score Colors ===== */
.score-excellent {
    color: var(--score-excellent);
}

.score-good {
    color: var(--score-good);
}

.score-fair {
    color: var(--score-fair);
}

.score-poor {
    color: var(--score-poor);
}

/* ===== Challenges Grid ===== */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.challenge-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    transition: border-color var(--transition-fast);
    cursor: pointer;
}

.challenge-card:hover {
    border-color: var(--color-accent);
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.75rem;
}

.challenge-title {
    font-size: 1rem;
    font-weight: 600;
}

.challenge-badge {
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-family: var(--font-mono);
}

.badge-security {
    background: rgba(239, 68, 68, 0.12);
    color: var(--color-error);
}

.badge-bug {
    background: rgba(251, 191, 36, 0.12);
    color: var(--color-warning);
}

.badge-performance {
    background: rgba(168, 85, 247, 0.12);
    color: var(--color-purple);
}

.challenge-description {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.challenge-stats {
    display: flex;
    justify-content: space-between;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.challenge-stat {
    text-align: center;
}

.challenge-stat-value {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    font-family: var(--font-mono);
    margin-bottom: 0.125rem;
}

.challenge-stat-label {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Tools Grid ===== */
.tools-grid {
    display: block;
}

.tool-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    transition: border-color var(--transition-fast);
}

.tool-card:hover {
    border-color: var(--color-accent);
}

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.tool-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.tool-stars {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
}

.tool-stars svg {
    width: 14px;
    height: 14px;
    stroke-width: 1.5;
}

.tool-description {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.tool-install {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.625rem 0.75rem;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    margin-bottom: 0.75rem;
    color: var(--color-accent-2);
}

.tool-performance {
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.performance-bars {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.performance-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.bar-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    min-width: 70px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.bar-track {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width var(--transition-slow);
}

.bar-value {
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: var(--font-mono);
    min-width: 45px;
    text-align: right;
}

/* ===== Matrix View — High Density Heatmap ===== */
.matrix-container {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.matrix-container h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.matrix-legend {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.legend-items {
    display: flex;
    gap: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.matrix-table {
    overflow-x: auto;
}

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

.matrix-table th,
.matrix-table td {
    padding: 0.625rem 0.75rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.matrix-table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.matrix-table td {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.matrix-table td:hover {
    border-color: var(--color-accent);
}

.matrix-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.125rem;
}

.matrix-score {
    font-size: 1rem;
    font-weight: 700;
}

.matrix-detail {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    margin: 2rem;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    color: var(--text-tertiary);
    cursor: pointer;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    transition: border-color var(--transition-fast);
}

.modal-close:hover {
    border-color: var(--color-accent);
    color: var(--text-primary);
}

#modal-body {
    padding: 2rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-left p {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}

.footer-right {
    display: flex;
    gap: 1.5rem;
}

.footer-right a {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    transition: color var(--transition-fast);
}

.footer-right a:hover {
    color: var(--color-accent);
}

/* ===== Responsive Design ===== */

/* Prevent any horizontal overflow on the page */
html,
body {
    overflow-x: hidden;
    max-width: 100vw;
}

@media (max-width: 768px) {

    /* Container */
    .container {
        padding: 0 1rem;
    }

    /* Header */
    .header-content {
        padding: 0.625rem 0;
    }

    .logo {
        font-size: 1rem;
    }

    .logo-icon svg {
        width: 16px;
        height: 16px;
    }

    .version-badge {
        font-size: 0.5625rem;
        padding: 0.15rem 0.375rem;
    }

    .header-right {
        gap: 0.5rem;
    }

    .theme-toggle,
    .github-link {
        width: 2rem;
        height: 2rem;
    }

    .theme-toggle svg,
    .github-link svg {
        width: 16px;
        height: 16px;
    }

    /* Hero */
    .hero {
        padding: 2rem 0 1.75rem;
    }

    .hero-content h2 {
        font-size: 1.375rem;
    }

    .hero-content p {
        font-size: 0.9375rem;
        margin-bottom: 1.5rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.625rem;
        max-width: 100%;
    }

    .stat {
        padding: 0.875rem 0.625rem;
    }

    .stat-value {
        font-size: 1.625rem;
    }

    .stat-label {
        font-size: 0.625rem;
    }

    .last-updated {
        margin-top: 1.25rem;
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }

    .update-label,
    .update-time {
        font-size: 0.75rem;
    }

    /* How It Works */
    .how-it-works {
        padding: 2rem 0;
    }

    .how-it-works h2 {
        font-size: 1.25rem;
        margin-bottom: 2rem;
    }

    .pipeline-step {
        flex: 0 1 100%;
    }

    /* Methodology */
    .methodology-section {
        padding: 2rem 0;
    }

    .methodology-section h2 {
        font-size: 1.25rem;
    }

    .methodology-intro {
        font-size: 0.8125rem;
        margin-bottom: 1.5rem;
    }

    .methodology-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .methodology-card {
        padding: 1.25rem;
    }

    /* Performance Trends */
    .trends-section {
        padding: 2rem 0;
    }

    .trends-section h2 {
        font-size: 1.25rem;
    }

    /* CTA */
    .contribute-cta {
        padding: 2rem 0;
    }

    .cta-text h2 {
        font-size: 1.25rem;
    }

    .cta-text p {
        font-size: 0.875rem;
    }

    .cta-button {
        font-size: 0.8125rem;
        padding: 0.625rem 1.25rem;
    }

    /* Main Content & Tabs */
    .main-content {
        padding: 1.5rem 0;
    }

    .tabs {
        overflow-x: auto;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        margin-bottom: 1.25rem;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    .tab-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
        gap: 0.375rem;
    }

    .tab-btn svg {
        width: 14px;
        height: 14px;
    }

    /* Leaderboard — stack layout */
    .leaderboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }

    .leaderboard-header h3 {
        font-size: 1.125rem;
    }

    .leaderboard-item {
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
        gap: 0.75rem;
        overflow: hidden;
    }

    .leaderboard-item .rank {
        position: absolute;
        top: 0.75rem;
        right: 0.75rem;
        min-width: auto;
        font-size: 1.125rem;
    }

    .tool-info {
        padding-right: 2.5rem;
    }

    .tool-name {
        font-size: 0.9375rem;
    }

    .tool-meta {
        flex-wrap: wrap;
        gap: 0.5rem;
        font-size: 0.75rem;
    }

    .metrics-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 0.375rem;
        width: 100%;
    }

    .metric-value {
        font-size: 0.8125rem;
        word-break: break-all;
    }

    .metric-label {
        font-size: 0.5rem;
        letter-spacing: 0.02em;
    }

    .metric-highlighted {
        padding: 0.2rem;
    }

    .metric-highlighted::after {
        display: none;
    }

    /* Challenges */
    .challenges-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .challenge-card {
        padding: 1rem;
    }

    .challenge-title {
        font-size: 0.9375rem;
    }

    .challenge-stat-value {
        font-size: 1rem;
    }

    /* Tools */
    .tools-section-grid {
        grid-template-columns: 1fr;
    }

    .tool-card {
        padding: 1rem;
    }

    .tool-title {
        font-size: 1rem;
    }

    .tool-install {
        font-size: 0.75rem;
        word-break: break-all;
    }

    /* Matrix — horizontal scroll */
    .matrix-container {
        padding: 1rem;
    }

    .matrix-container h3 {
        font-size: 1.125rem;
    }

    .matrix-legend {
        flex-wrap: wrap;
        gap: 0.5rem;
        font-size: 0.6875rem;
    }

    .legend-items {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .matrix-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -1rem;
        padding: 0 1rem;
    }

    .matrix-table table {
        min-width: 600px;
    }

    .matrix-table th,
    .matrix-table td {
        padding: 0.5rem;
        font-size: 0.75rem;
    }

    .matrix-score {
        font-size: 0.875rem;
    }

    .matrix-detail {
        font-size: 0.5625rem;
    }

    /* Modal */
    .modal-content {
        margin: 1rem;
        border-radius: 6px;
    }

    #modal-body {
        padding: 1.25rem;
    }

    /* Footer */
    .footer {
        padding: 1.25rem 0;
    }

    .footer-content {
        flex-direction: column;
        align-items: start;
        gap: 0.75rem;
    }

    .footer-left p {
        font-size: 0.75rem;
    }

    .footer-right {
        gap: 1rem;
    }

    .footer-right a {
        font-size: 0.75rem;
    }

    /* Breakdown */
    .breakdown-grid {
        grid-template-columns: 1fr;
    }

    .breakdown-tabs .tab-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
    }
}

/* Extra small screens (iPhone SE, very narrow devices) */
@media (max-width: 380px) {
    .container {
        padding: 0 0.75rem;
    }

    .hero-content h2 {
        font-size: 1.25rem;
    }

    .hero-stats {
        gap: 0.5rem;
    }

    .stat-value {
        font-size: 1.375rem;
    }

    .metrics-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.375rem;
    }

    .metric-value {
        font-size: 0.75rem;
    }

    .tab-btn {
        padding: 0.5rem 0.625rem;
        font-size: 0.75rem;
    }

    .leaderboard-item {
        padding: 0.75rem;
    }

    .tool-name {
        font-size: 0.8125rem;
    }
}

/* ===== Metrics Breakdown Styles ===== */
.breakdown-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.breakdown-tabs .tab-btn {
    background: none;
    border: none;
    padding: 0.625rem 1.25rem;
    cursor: pointer;
    color: var(--text-tertiary);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
    font-size: 0.875rem;
}

.breakdown-tabs .tab-btn:hover {
    color: var(--text-primary);
}

.breakdown-tabs .tab-btn.active {
    color: var(--color-accent);
}

.breakdown-tabs .tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}

.breakdown-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

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

.breakdown-table th,
.breakdown-table td {
    padding: 0.625rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.breakdown-table th {
    font-weight: 600;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.breakdown-table .metric {
    font-family: var(--font-mono);
    font-weight: 500;
}

.breakdown-chart {
    height: 300px;
    position: relative;
}

.language-badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: var(--color-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.severity-badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.compact-table {
    width: 100%;
    font-size: 0.8125rem;
}

.compact-table th,
.compact-table td {
    padding: 0.375rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.tool-breakdown {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.breakdown-mini-tabs {
    display: flex;
    gap: 0.375rem;
    margin: 0.75rem 0;
}

.mini-tab {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.375rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.mini-tab:hover {
    border-color: var(--color-accent);
    color: var(--text-primary);
}

.mini-tab.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

@media (max-width: 768px) {
    .breakdown-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== LLM Badges ===== */
.llm-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    border: 1px solid var(--border-color);
}

.llm-badge svg {
    width: 11px;
    height: 11px;
    stroke-width: 1.5;
}

.tool-llm {
    margin-top: 0.5rem;
}

/* ===== Tool Type Badges ===== */
.tool-type-badge {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    vertical-align: middle;
    margin-left: 0.375rem;
    font-family: var(--font-mono);
}

.tool-type-badge.agent {
    background: rgba(99, 102, 241, 0.15);
    color: var(--color-accent);
}

.tool-type-badge.pure-model {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

/* ===== Tool Section Headers ===== */
.tool-section-header {
    margin-bottom: 1.25rem;
    margin-top: 2rem;
}

.tool-section-header:first-child {
    margin-top: 0;
}

.tool-section-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    letter-spacing: -0.015em;
}

.tool-section-header p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

.tools-section-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.pure-model-card {
    border-left: 2px solid #a855f7;
}

/* ===== System Prompt Section ===== */
.system-prompt-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    margin-top: 1.5rem;
}

.system-prompt-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.system-prompt-description {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    margin-bottom: 0.75rem;
}

.system-prompt-details summary {
    cursor: pointer;
    color: var(--color-accent);
    font-weight: 500;
    font-size: 0.8125rem;
    padding: 0.5rem 0;
    user-select: none;
}

.system-prompt-details summary:hover {
    text-decoration: underline;
}

.system-prompt-code {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 0.75rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-secondary);
}

/* ===== Coming Soon State ===== */
.leaderboard-item.coming-soon {
    opacity: 0.45;
}

.rank.coming-soon {
    color: var(--text-tertiary);
}

.coming-soon-text .metric-value {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    font-style: italic;
}