:root {
    --bg: #f5f7fb;
    --text: #0f172a;
    --muted: #5f6b7c;
    --border: #d4dbe8;
    --card-bg: #ffffff;
    --topbar-h: 52px;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.10);
}

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

body {
    font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    overflow: hidden;
    height: 100dvh;
}

/* ── Map ── */
#map {
    position: fixed;
    inset: 0;
    z-index: 0;
}

/* ── Top bar ── */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-h);
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1rem;
    z-index: 500;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    overflow: hidden;
}

.topbar-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1rem;
    white-space: nowrap;
    flex-shrink: 0;
}
.topbar-logo-img { height: 28px; width: auto; }
.topbar-logo-text { font-size: 0.95rem; }

/* ── Filters ── */
.topbar-filters {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}
.topbar-filters::-webkit-scrollbar { display: none; }

.op-filters, .type-filters {
    display: flex;
    gap: 0.25rem;
    flex-shrink: 0;
}

.op-btn {
    padding: 0.22rem 0.6rem;
    border-radius: 999px;
    border: 1.5px solid var(--oc, #888);
    background: transparent;
    color: var(--oc, #333);
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
    opacity: 0.45;
}
.op-btn.active {
    background: var(--oc, #333);
    color: #fff;
    opacity: 1;
}

.type-btn {
    padding: 0.22rem 0.55rem;
    border-radius: 6px;
    border: 1.5px solid var(--border);
    background: transparent;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    opacity: 0.45;
}
.type-btn.active {
    background: #0f172a;
    color: #fff;
    border-color: #0f172a;
    opacity: 1;
}

.svc-search {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    flex-shrink: 0;
}
.svc-search input {
    width: 80px;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.82rem;
    color: var(--text);
    background: #fff;
    outline: none;
    transition: border-color 0.15s;
}
.svc-search input:focus { border-color: #94a3b8; }

/* ── Actions ── */
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    white-space: nowrap;
}

.bus-count {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--muted);
}

.refresh-wrap {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.refresh-countdown {
    font-size: 0.75rem;
    color: var(--muted);
    min-width: 24px;
}

.topbar-btn {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.3rem 0.6rem;
    background: #fff;
    color: var(--text);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s;
}
.topbar-btn:hover { background: var(--bg); }

/* ── Map legend ── */
.map-legend {
    position: fixed;
    bottom: 1.5rem;
    left: 1rem;
    background: rgba(255,255,255,0.95);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.6rem 0.8rem;
    z-index: 400;
    box-shadow: var(--shadow);
    font-size: 0.78rem;
}
.legend-row {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.15rem 0;
    color: var(--muted);
    font-weight: 500;
}
.legend-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.load-ring {
    width: 10px; height: 10px;
    border-radius: 50%;
    border: 2.5px solid transparent;
    flex-shrink: 0;
    background: transparent;
}
.load-ring.low  { border-color: #22c55e; }
.load-ring.mod  { border-color: #f59e0b; }
.load-ring.high { border-color: #ef4444; }
.legend-divider { border-top: 1px solid var(--border); margin: 0.3rem 0; }

/* ── Stats panel ── */
.stats-toggle-btn { font-size: 0.85rem; }

.stats-panel {
    position: fixed;
    top: calc(var(--topbar-h) + 0.5rem);
    right: 0.75rem;
    width: 300px;
    max-height: calc(100dvh - var(--topbar-h) - 1rem);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    z-index: 450;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.stats-panel.hidden { display: none; }

.stats-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.85rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.stats-panel-title { font-weight: 700; font-size: 0.9rem; }
.stats-close-btn {
    border: none; background: none; color: var(--muted);
    font-size: 0.9rem; cursor: pointer; padding: 0.2rem 0.4rem;
    border-radius: 4px;
}
.stats-close-btn:hover { background: var(--bg); }

.stats-panel-body {
    overflow-y: auto;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stats-loading { color: var(--muted); font-size: 0.85rem; text-align: center; padding: 1rem 0; }

/* Overall row */
.stats-overall {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.stats-kpi {
    flex: 1;
    min-width: 60px;
    background: var(--bg);
    border-radius: 8px;
    padding: 0.5rem 0.6rem;
    text-align: center;
}
.stats-kpi-val { font-size: 1.2rem; font-weight: 800; color: var(--text); line-height: 1.1; }
.stats-kpi-lbl { font-size: 0.7rem; color: var(--muted); margin-top: 0.15rem; }

/* Operator cards */
.op-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}
.op-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.7rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}
.op-card-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.op-card-name { font-weight: 700; font-size: 0.83rem; flex: 1; }
.op-card-count { font-size: 0.78rem; color: var(--muted); font-weight: 600; }

.op-card-body { padding: 0.5rem 0.7rem; display: flex; flex-direction: column; gap: 0.4rem; }

.stat-row { font-size: 0.78rem; color: var(--muted); }
.stat-row-label { margin-bottom: 0.15rem; display: flex; justify-content: space-between; }
.stat-row-label span:last-child { font-weight: 600; color: var(--text); }

/* Stacked bar */
.stacked-bar {
    height: 7px;
    border-radius: 4px;
    overflow: hidden;
    background: #f1f5f9;
    display: flex;
}
.stacked-bar span { height: 100%; }

/* GPS tracked */
.gps-bar-wrap { display: flex; align-items: center; gap: 0.4rem; font-size: 0.78rem; }
.gps-bar-track { flex: 1; height: 7px; background: #f1f5f9; border-radius: 4px; overflow: hidden; }
.gps-bar-fill { height: 100%; border-radius: 4px; background: #22c55e; transition: width 0.4s; }
.gps-bar-val { min-width: 30px; text-align: right; font-weight: 600; color: var(--text); }

/* WAB */
.wab-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    background: #dbeafe;
    color: #1d4ed8;
    border-radius: 4px;
    padding: 0.1rem 0.4rem;
}

@media (max-width: 640px) {
    .stats-panel { width: calc(100vw - 1.5rem); right: 0.75rem; }
}

/* ── Leaflet popup ── */
.bus-popup { min-width: 160px; }
.bus-popup-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}
.bus-popup-svc {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text);
}
.bus-popup-op {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.1rem 0.45rem;
    border-radius: 999px;
    color: #fff;
}
.bus-popup-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    padding: 0.1rem 0;
    color: var(--muted);
}
.bus-popup-row span:last-child { font-weight: 600; color: var(--text); }

/* ── Mobile ── */
@media (max-width: 640px) {
    .topbar-logo-text { display: none; }
    .type-filters { display: none; }
    .bus-count-wrap { display: none; }
    .map-legend { display: none; }
}