/* ═══════════════════════════════════════════
   G1 Biped Robot RL Dashboard — Dark Theme
   ═══════════════════════════════════════════ */

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a1f2e;
    --bg-card-hover: #212739;
    --border: #2a3145;
    --text-primary: #e8eaed;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-blue: #3b82f6;
    --accent-cyan: #22d3ee;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #a855f7;
    --gradient-accent: linear-gradient(135deg, #3b82f6, #22d3ee);
    --gradient-card: linear-gradient(145deg, #1a1f2e, #151a27);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

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

/* ── HEADER ── */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    font-size: 32px;
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.5));
}

.header h1 {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-green);
}

.status-badge.offline {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--accent-red);
}

.pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.version {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ── DASHBOARD MAIN ── */
.dashboard {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ── KPI CARDS ── */
.kpi-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.kpi-card {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-card);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.kpi-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.kpi-value {
    font-size: 32px;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    margin-bottom: 4px;
}

.kpi-sub {
    font-size: 11px;
    color: var(--text-secondary);
}

.kpi-progress-bar {
    margin-top: 12px;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.kpi-progress-fill {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: 2px;
    width: 0%;
    transition: width 0.8s ease;
}

/* ── CHART CARDS ── */
.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-card);
}

.chart-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.chart-container {
    height: 280px;
    width: 100%;
}

/* ── INFERENCE SECTION ── */
.inference-section {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 16px;
}

.inference-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.inference-card h3 {
    font-size: 16px;
    font-weight: 600;
}

.inference-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.inference-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

.select-model {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    outline: none;
}

.btn-inference {
    padding: 10px 24px;
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    white-space: nowrap;
}

.btn-inference:hover {
    transform: scale(1.03);
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.4);
}

.btn-inference:active {
    transform: scale(0.97);
}

.btn-inference:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.inference-status {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    min-height: 20px;
}

/* ── EXPERIMENTS TABLE ── */
.experiments-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.experiments-section h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.experiments-table th {
    text-align: left;
    padding: 10px 16px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border);
}

.experiments-table td {
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(42, 49, 69, 0.5);
    font-family: var(--font-mono);
}

.experiments-table tr:hover td {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.btn-small {
    padding: 4px 12px;
    background: transparent;
    border: 1px solid var(--accent-blue);
    border-radius: 4px;
    color: var(--accent-blue);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-small:hover {
    background: var(--accent-blue);
    color: white;
}

/* ── TECH STACK ── */
.tech-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.tech-section h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
}

.tech-item {
    text-align: center;
    padding: 16px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: transform 0.2s, border-color 0.2s;
}

.tech-item:hover {
    transform: translateY(-3px);
    border-color: var(--accent-blue);
}

.tech-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.tech-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tech-desc {
    font-size: 11px;
    color: var(--text-muted);
}

/* ── FOOTER ── */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 12px;
    border-top: 1px solid var(--border);
    margin-top: 24px;
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
    .kpi-row { grid-template-columns: repeat(2, 1fr); }
    .chart-row { grid-template-columns: 1fr; }
    .inference-section { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
    .header { flex-direction: column; gap: 12px; padding: 12px 16px; }
    .dashboard { padding: 16px; }
    .kpi-row { grid-template-columns: 1fr 1fr; }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
}