/* ── Reset & Base ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg:           #0f1117;
    --bg-card:      #1a1d27;
    --bg-card-hover:#1f2335;
    --border:       #2a2d3e;
    --accent:       #4f9cf9;
    --accent-dim:   #2d5a9e;
    --text:         #e2e8f0;
    --text-muted:   #64748b;
    --text-sub:     #94a3b8;
    --success:      #22c55e;
    --warning:      #f59e0b;
    --danger:       #ef4444;
    --danger-dim:   #7f1d1d;

    --radius:       12px;
    --radius-sm:    8px;
    --font:         -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Camera ── */
.camera-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.camera-container img {
    width: 100%;
    display: block;
}

.camera-timestamp {
    padding: 0.75rem 1.25rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    min-height: 100vh;
    padding-bottom: 2rem;
}

/* ── Header ── */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

header h1 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.02em;
}

.subtitle {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}

.last-updated {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 0.25rem;
    padding: 1rem 2rem 0;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-family: var(--font);
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap;
}

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

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

/* ── Tab Content ── */
.tab-content {
    display: none;
    padding: 1.5rem 2rem;
}

.tab-content.active {
    display: block;
}

/* ── Card Grid ── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* ── Cards ── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: background 0.15s;
}

.card:hover {
    background: var(--bg-card-hover);
}

.card--large {
    grid-column: span 2;
}

.card--wide {
    grid-column: span 2;
}

.card-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.card-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--text);
    letter-spacing: -0.03em;
}

.card--large .card-value {
    font-size: 3.5rem;
}

.card-value--text {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.card-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.card-sub {
    font-size: 0.8rem;
    color: var(--text-sub);
    margin-top: 0.5rem;
    line-height: 1.4;
}

/* ── Risk colour overrides ── */
.risk-none, .risk-very-low {
    color: var(--success);
}

.risk-low {
    color: var(--success);
}

.risk-moderate {
    color: var(--warning);
}

.risk-high, .risk-extreme {
    color: var(--danger);
}

.card--danger {
    border-color: var(--danger);
    background: var(--danger-dim);
}

/* ── Trend arrows ── */
.trend-rising::before  { content: "↑ "; color: var(--success); }
.trend-falling::before { content: "↓ "; color: var(--danger); }
.trend-steady::before  { content: "→ "; color: var(--text-muted); }

/* ── Charts ── */
.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    height: 300px;
    position: relative;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    header {
        padding: 1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .tabs {
        padding: 0.75rem 1rem 0;
    }

    .tab-content {
        padding: 1rem;
    }

    .card--large,
    .card--wide {
        grid-column: span 1;
    }
}