:root {
    --color-bg: #0d1117;
    --color-bg-secondary: #161b22;
    --color-bg-tertiary: #21262d;
    --color-border: #30363d;
    --color-text: #c9d1d9;
    --color-text-muted: #8b949e;
    --color-text-bright: #f0f6fc;
    --color-accent: #58a6ff;
    --color-success: #3fb950;
    --color-warning: #d29922;
    --color-error: #f85149;
    
    /* Type checker colors */
    --color-pyright: #3178c6;
    --color-pyrefly: #e74c3c;
    --color-ty: #9b59b6;
    --color-mypy: #2ecc71;
    --color-zuban: #f39c12;
    
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

code {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: 60px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: 12px;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.hero .description {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.date-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.date-selector label {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.date-input {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    color: var(--color-text);
    font-size: 0.9rem;
}

.date-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.date-btn {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px 16px;
    color: var(--color-text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.date-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

.last-updated {
    display: inline-block;
    background: var(--color-bg-tertiary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Navigation */
.nav-bar {
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.nav-bar a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

.nav-bar a:hover {
    opacity: 0.8;
}

.back-link {
    font-weight: 500;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.nav-links a:hover {
    color: var(--color-text);
}

/* Sections */
.section {
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
    border-bottom: none;
}

.section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-bright);
    margin-bottom: 24px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card.loading {
    opacity: 0.5;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 8px;
}

/* Chart Grid */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.chart-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.chart-card.full-width {
    grid-column: 1 / -1;
}

.chart-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.chart-card .chart-description {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.search-input,
.filter-select {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    color: var(--color-text);
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.search-input {
    flex: 1;
    min-width: 200px;
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.filter-select {
    cursor: pointer;
}

/* Results Table */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.results-table th,
.results-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.results-table th {
    background: var(--color-bg-tertiary);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    position: sticky;
    top: 0;
}

.results-table tbody tr {
    background: var(--color-bg-secondary);
    transition: background 0.2s;
}

.results-table tbody tr:hover {
    background: var(--color-bg-tertiary);
}

.results-table tbody tr:last-child td {
    border-bottom: none;
}

.results-table .loading-row {
    text-align: center;
    color: var(--color-text-muted);
    padding: 48px;
}

.results-table .package-name {
    font-weight: 500;
    color: var(--color-text-bright);
}

.results-table .package-name a {
    color: var(--color-accent);
    text-decoration: none;
}

.results-table .package-name a:hover {
    text-decoration: underline;
}

.results-table .latency {
    font-family: var(--font-mono);
}

/* Type Checker Badges */
.checker-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.checker-badge.pyright {
    background: rgba(49, 120, 198, 0.2);
    color: var(--color-pyright);
}

.checker-badge.pyrefly {
    background: rgba(231, 76, 60, 0.2);
    color: var(--color-pyrefly);
}

.checker-badge.ty {
    background: rgba(155, 89, 182, 0.2);
    color: var(--color-ty);
}

.checker-badge.mypy {
    background: rgba(46, 204, 113, 0.2);
    color: var(--color-mypy);
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.success {
    background: rgba(63, 185, 80, 0.2);
    color: var(--color-success);
}

.status-badge.error {
    background: rgba(248, 81, 73, 0.2);
    color: var(--color-error);
}

.status-badge.warning {
    background: rgba(210, 153, 34, 0.2);
    color: var(--color-warning);
}

/* Methodology Section */
.methodology-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.method-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.method-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-bright);
    margin-bottom: 12px;
}

.method-card p,
.method-card li {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

.method-card ol,
.method-card ul {
    padding-left: 20px;
}

.method-card li {
    margin: 8px 0;
}

.method-card strong {
    color: var(--color-text);
}

.method-note {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--color-bg-tertiary);
    border-left: 3px solid var(--color-accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.85rem;
}

.method-note strong {
    color: var(--color-accent);
}

/* Legend */
.legend-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: transform 0.2s;
}

.legend-item:hover {
    transform: translateX(4px);
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    flex-shrink: 0;
}

.legend-item.pyright .legend-color { background: var(--color-pyright); }
.legend-item.pyrefly .legend-color { background: var(--color-pyrefly); }
.legend-item.ty .legend-color { background: var(--color-ty); }
.legend-item.mypy .legend-color { background: var(--color-mypy); }
.legend-item.zuban .legend-color { background: var(--color-zuban); }

.legend-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.legend-info strong {
    color: var(--color-text-bright);
    font-size: 0.95rem;
}

.legend-info span {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.legend-version {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    background: rgba(96, 165, 250, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    margin-top: 2px;
}

.legend-version:empty {
    display: none;
}

/* Footer */
.footer {
    padding: 48px 0;
    text-align: center;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
}

.footer a {
    color: var(--color-accent);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer p {
    margin: 8px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 40px 0;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero .subtitle {
        font-size: 1rem;
    }
    
    .chart-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-bar .container {
        flex-direction: column;
        gap: 12px;
    }
    
    .nav-links {
        gap: 16px;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .search-input {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .methodology-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .legend-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.loading {
    animation: pulse 1.5s infinite;
}

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

.section {
    animation: fadeIn 0.5s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}