:root {
    --bg-dark: #0f1117;
    --bg-card: #1a1d27;
    --bg-card-hover: #222635;
    --border: #2a2e3b;
    --text-primary: #e4e6ed;
    --text-secondary: #8b8fa3;
    --accent-green: #00d97e;
    --accent-red: #e63757;
    --accent-blue: #2c7be5;
    --accent-yellow: #f6c343;
    --accent-purple: #9b59b6;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.5;
}

/* ── Header ────────────────────────────────────────────────────── */
.header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header h1 span {
    color: var(--accent-green);
}

.header-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.refresh-btn {
    background: var(--accent-blue);
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 500;
    transition: opacity 0.2s;
}

.refresh-btn:hover { opacity: 0.85; }
.refresh-btn:disabled { opacity: 0.5; cursor: wait; }

/* ── Layout ────────────────────────────────────────────────────── */
.dashboard {
    max-width: 1600px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.row {
    display: grid;
    gap: 24px;
}

.row-4 { grid-template-columns: repeat(4, 1fr); }
.row-3 { grid-template-columns: repeat(3, 1fr); }
.row-2 { grid-template-columns: repeat(2, 1fr); }
.row-1-2 { grid-template-columns: 1fr 2fr; }
.row-2-1 { grid-template-columns: 2fr 1fr; }

/* ── Cards ─────────────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: background 0.2s;
}

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

.card-title {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* ── Stat Cards ────────────────────────────────────────────────── */
.stat-card {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.stat-value.green { color: var(--accent-green); }
.stat-value.red { color: var(--accent-red); }
.stat-value.blue { color: var(--accent-blue); }
.stat-value.yellow { color: var(--accent-yellow); }

.stat-sub {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ── Fuel Tabs ─────────────────────────────────────────────────── */
.fuel-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.fuel-tab {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 5px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

.fuel-tab:hover:not(.active) {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

/* ── Map ───────────────────────────────────────────────────────── */
#map {
    height: 500px;
    border-radius: 8px;
    z-index: 1;
}

.map-legend {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

/* ── Tables ─────────────────────────────────────────────────────── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.data-table th {
    text-align: left;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.data-table td {
    padding: 7px 10px;
    border-bottom: 1px solid rgba(42, 46, 59, 0.5);
}

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

.price-cheap { color: var(--accent-green); font-weight: 600; }
.price-expensive { color: var(--accent-red); font-weight: 600; }

/* ── Charts ─────────────────────────────────────────────────────── */
.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
}

.chart-container.tall {
    height: 400px;
}

/* ── Service comparison bars ───────────────────────────────────── */
.service-bars {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.service-bar-group label {
    font-size: 0.82rem;
    font-weight: 500;
    margin-bottom: 6px;
    display: block;
}

.service-bar-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.78rem;
    margin-bottom: 4px;
}

.service-bar-row .bar-label {
    width: 90px;
    color: var(--text-secondary);
    text-align: right;
}

.service-bar-row .bar {
    height: 22px;
    border-radius: 4px;
    min-width: 4px;
    transition: width 0.5s ease;
}

.service-bar-row .bar.self { background: var(--accent-green); }
.service-bar-row .bar.full { background: var(--accent-yellow); }

.service-bar-row .bar-value {
    font-weight: 600;
    min-width: 60px;
}

/* ── Loading ───────────────────────────────────────────────────── */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 12px;
}

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

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 1200px) {
    .row-4 { grid-template-columns: repeat(2, 1fr); }
    .row-3 { grid-template-columns: 1fr; }
    .row-2, .row-1-2, .row-2-1 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .header { padding: 12px 16px; flex-direction: column; gap: 10px; }
    .dashboard { padding: 12px; gap: 16px; }
    .row-4 { grid-template-columns: 1fr 1fr; }
    #map { height: 350px; }
}