:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #38bdf8;
    --accent-hover: #7dd3fc;
    --success: #4ade80;
    --warning: #fbbf24;
    --danger: #f87171;
    --border: #334155;
    --phi3-color: #38bdf8;
    --gemma-color: #a78bfa;
    --qwen-color: #34d399;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', -apple-system, sans-serif;
}

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

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

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

/* Header */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    font-family: var(--font-mono);
}

.logo span { color: var(--text-secondary); font-weight: 400; }

nav { display: flex; gap: 1.5rem; }

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover, nav a.active { color: var(--accent); }

/* Hero */
.hero {
    padding: 4rem 0 3rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent), var(--gemma-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 640px;
    margin: 0 auto;
}

/* Status badges */
.status-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-size: 0.8rem;
    border: 1px solid var(--border);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}

.status-dot.offline { background: var(--text-muted); animation: none; }

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

/* Sections */
section { padding: 3rem 0; }

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

/* Model cards */
.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: border-color 0.2s, transform 0.2s;
}

.model-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.model-card.phi3 { border-top: 3px solid var(--phi3-color); }
.model-card.gemma { border-top: 3px solid var(--gemma-color); }
.model-card.qwen { border-top: 3px solid var(--qwen-color); }

.model-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.model-name {
    font-size: 1.2rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.model-tag {
    font-size: 0.7rem;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-weight: 600;
    text-transform: uppercase;
}

.model-card.phi3 .model-tag { background: rgba(56,189,248,0.15); color: var(--phi3-color); }
.model-card.gemma .model-tag { background: rgba(167,139,250,0.15); color: var(--gemma-color); }
.model-card.qwen .model-tag { background: rgba(52,211,153,0.15); color: var(--qwen-color); }

.model-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.meta-item label {
    display: block;
    color: var(--text-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.2rem;
}

.meta-item span {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
}

.model-bench {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.model-bench .meta-item span {
    color: var(--accent);
}

.model-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* Benchmark results */
.benchmark-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.6rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

/* Chart containers */
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
}

.chart-card h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.chart-container {
    position: relative;
    height: 280px;
}

/* Bar chart (CSS-only) */
.bar-chart {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 2rem;
    height: 220px;
    padding: 0 1rem;
}

.bar-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    max-width: 120px;
}

.bar {
    width: 100%;
    border-radius: 6px 6px 0 0;
    transition: height 0.8s ease-out;
    position: relative;
    min-height: 4px;
}

.bar.phi3 { background: var(--phi3-color); }
.bar.gemma { background: var(--gemma-color); }
.bar.qwen { background: var(--qwen-color); }

.bar-value {
    position: absolute;
    top: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.bar-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-align: center;
}

/* Results table */
.results-table-wrapper {
    overflow-x: auto;
    margin-top: 1.5rem;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.results-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.results-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.results-table tr:hover td { background: var(--bg-card-hover); }

/* Tradeoff section */
.tradeoff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tradeoff-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
}

.tradeoff-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tradeoff-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
}

.tradeoff-card .highlight {
    color: var(--accent);
    font-weight: 600;
}

.tradeoff-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.tradeoff-icon.privacy { background: rgba(52,211,153,0.15); }
.tradeoff-icon.latency { background: rgba(251,191,36,0.15); }
.tradeoff-icon.cost { background: rgba(56,189,248,0.15); }
.tradeoff-icon.quality { background: rgba(167,139,250,0.15); }

/* Comparison table */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    font-size: 0.85rem;
}

.comparison-table th {
    padding: 0.75rem 1rem;
    text-align: left;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.comparison-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.comparison-table tr:hover td { background: var(--bg-card-hover); }

.rating {
    display: inline-flex;
    gap: 2px;
}

.rating-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
}

.rating-dot.filled { background: var(--accent); }

/* Try it section */
.try-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
}

.try-form { display: flex; flex-direction: column; gap: 1rem; }

.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.form-group { flex: 1; min-width: 200px; }

.form-group label {
    display: block;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}

.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 0.6rem 0.8rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    resize: vertical;
}

.form-group textarea { min-height: 80px; font-family: var(--font-mono); }
.form-group select:focus,
.form-group textarea:focus { outline: none; border-color: var(--accent); }

.response-box {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    min-height: 100px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    line-height: 1.6;
}

.response-meta {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 0.5rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

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

/* Responsive */
@media (max-width: 640px) {
    .hero h1 { font-size: 1.75rem; }
    .model-grid { grid-template-columns: 1fr; }
    header .container { flex-direction: column; gap: 1rem; }
}