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

:root {
    --bg-page:        #f7f4ef;
    --bg-panel:       #ffffff;
    --bg-panel-alt:   #fdf9f4;
    --bg-hover:       #f0ebe3;
    --border:         #e2d9cd;
    --border-strong:  #c9bfb3;
    --shadow:         rgba(100, 80, 60, 0.10);

    --pastel-green:   #6dbf8b;
    --pastel-yellow:  #f5c06b;
    --pastel-orange:  #f0876a;
    --pastel-red:     #c0616a;
    --pastel-blue:    #7ab3d4;
    --pastel-purple:  #a98fcf;
    --pastel-teal:    #6dbfbe;

    --text-primary:   #3a3028;
    --text-secondary: #7a6e65;
    --text-muted:     #b0a89e;

    --topbar-height:  50px;
    --sidebar-width:  245px;
    --graph-width:    390px;
}

html, body {
    height: 100%;
    font-family: 'Segoe UI', system-ui, Arial, sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    font-size: 14px;
    overflow: hidden;
}

#topbar {
    overflow: visible;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-height);
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 18px;
    z-index: 3000;
    gap: 12px;
    box-shadow: 0 1px 6px var(--shadow);
}

#app-title {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    margin-right: 10px;
    letter-spacing: -0.01em;
}

#topbar-nav {
    display: flex;
    list-style: none;
    gap: 2px;
    flex: 1;
}

.nav-item { position: relative; }

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 6px 13px;
    border-radius: 7px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
    font-family: inherit;
}

.nav-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown {
    display: none;
    position: absolute;
    margin-top: 6px;
    left: 0;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    min-width: 210px;
    padding: 6px 0;
    z-index: 4000;
    box-shadow: 0 8px 28px var(--shadow);
}

.dropdown-wide { min-width: 250px; }

.nav-item:hover .dropdown { display: block; }

.dropdown-item {
    display: block;
    padding: 8px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.84rem;
    transition: background 0.12s, color 0.12s;
}

.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown-item.active-city {
    color: var(--pastel-green);
    font-weight: 600;
}

.dropdown-item.disabled {
    color: var(--text-muted);
    cursor: not-allowed;
    pointer-events: none;
}

.dropdown-header {
    padding: 6px 18px 8px;
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}

.dropdown-footer {
    padding: 8px 18px 4px;
    font-size: 0.74rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    margin-top: 4px;
}

.battery-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
}

.battery-name {
    font-size: 0.78rem;
    color: var(--text-secondary);
    width: 135px;
    flex-shrink: 0;
}

.battery-bar-wrap {
    flex: 1;
    height: 6px;
    background: var(--bg-hover);
    border-radius: 3px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.battery-bar {
    display: block;
    height: 100%;
    background: var(--pastel-green);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.battery-pct {
    font-size: 0.74rem;
    color: var(--text-muted);
    width: 32px;
    text-align: right;
}

.trend-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 18px;
    font-size: 0.84rem;
    color: var(--text-secondary);
    transition: background 0.12s;
}

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

.trend-name { flex: 1; }

.trend-val { font-weight: 700; font-size: 0.82rem; }
.trend-val.up      { color: var(--pastel-green); }
.trend-val.down    { color: var(--pastel-red);   }
.trend-val.neutral { color: var(--text-muted);   }

#topbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    margin-left: auto;
}

#status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--text-muted);
    flex-shrink: 0;
}

#status-dot.live {
    background: var(--pastel-green);
    animation: pulse 2s infinite;
}

#status-dot.error { background: var(--pastel-red); }

@keyframes pulse {
    0%   { box-shadow: 0 0 0 0   rgba(109,191,139,0.7); }
    70%  { box-shadow: 0 0 0 7px rgba(109,191,139,0);   }
    100% { box-shadow: 0 0 0 0   rgba(109,191,139,0);   }
}

#main-content {
    display: flex;
    position: fixed;
    top: var(--topbar-height);
    left: 0; right: 0; bottom: 0;
}

#sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: var(--bg-panel-alt);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 12px 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    z-index: 100;
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.sidebar-section-title {
    font-size: 0.70rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 14px 14px 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.coming-soon {
    font-size: 0.64rem;
    background: var(--bg-hover);
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: 4px;
    padding: 1px 6px;
    text-transform: none;
    letter-spacing: 0;
}

#update-box {
    padding: 12px 14px 14px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
    background: var(--bg-panel);
}

#update-box .sidebar-section-title {
    padding: 0 0 5px 0;
    font-size: 0.70rem;
}

#last-updated-time {
    font-size: 0.88rem;
    color: var(--text-primary);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

#next-update-countdown {
    font-size: 0.74rem;
    color: var(--text-muted);
    margin-top: 3px;
}

#location-list {
    padding: 4px 9px 8px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.loc-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 9px;
    padding: 10px 12px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.loc-card:hover {
    border-color: var(--pastel-blue);
    background: #f0f6fb;
    box-shadow: 0 2px 8px var(--shadow);
}

.loc-card.selected {
    border-color: var(--pastel-blue);
    background: #eef5fb;
    box-shadow: 0 2px 8px var(--shadow);
}

.loc-card-name {
    font-size: 0.84rem;
    color: var(--text-primary);
    font-weight: 600;
}

.loc-card-borough {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.loc-card-count {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 5px;
}

#legend {
    padding: 4px 14px 14px;
    border-bottom: 1px solid var(--border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.80rem;
    color: var(--text-secondary);
    padding: 3px 0;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 1px solid rgba(0,0,0,0.08);
}

#map-wrapper {
    flex: 1;
    position: relative;
    min-width: 0;
}

#map {
    width: 100%;
    height: 100%;
}

#info-panel {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 245px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    z-index: 2000;
    box-shadow: 0 6px 24px var(--shadow);
    transition: opacity 0.2s, transform 0.2s;
}

#info-panel.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
}

#close-panel {
    position: absolute;
    top: 10px; right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    line-height: 1;
}

#close-panel:hover { color: var(--text-primary); }

#panel-borough-tag {
    display: inline-block;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--pastel-purple);
    border: 1px solid var(--pastel-purple);
    border-radius: 5px;
    padding: 1px 8px;
    margin-bottom: 8px;
    background: #f6f0fa;
}

#panel-location-name {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 3px;
    font-weight: 700;
}

#panel-street {
    font-size: 0.76rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.big-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--pastel-teal);
    line-height: 1;
}

.panel-label {
    font-size: 0.77rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

#panel-type {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: capitalize;
}

#panel-description {
    font-size: 0.77rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin-bottom: 8px;
}

#panel-coords {
    font-size: 0.69rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

#graph-toggle-btn {
    position: fixed;
    bottom: 28px;
    right: 22px;
    z-index: 2500;
    background: var(--bg-panel);
    border: 1px solid var(--border-strong);
    color: var(--text-primary);
    font-size: 0.85rem;
    padding: 8px 18px;
    border-radius: 22px;
    cursor: pointer;
    box-shadow: 0 3px 14px var(--shadow);
    transition: background 0.15s, border-color 0.15s, right 0.3s ease;
    font-family: inherit;
}

#graph-toggle-btn:hover {
    background: var(--bg-hover);
    border-color: var(--pastel-blue);
}

#graph-toggle-btn.graph-open {
    right: calc(var(--graph-width) + 22px);
}

#graph-panel {
    width: var(--graph-width);
    flex-shrink: 0;
    background: var(--bg-panel);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 100;
    transition: width 0.3s ease, opacity 0.3s ease;
}

#graph-panel.hidden {
    width: 0;
    opacity: 0;
    pointer-events: none;
    border-left: none;
}

#graph-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg-panel-alt);
}

#graph-panel-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
}

#close-graph {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    font-family: inherit;
}

#close-graph:hover { color: var(--text-primary); }

#graph-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg-panel-alt);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 100px;
}

.control-group label {
    font-size: 0.70rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}

/* colored dot next to sensor overlay labels */
.sensor-color-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.control-group select {
    background: var(--bg-panel);
    border: 1px solid var(--border-strong);
    color: var(--text-primary);
    font-size: 0.82rem;
    padding: 5px 9px;
    border-radius: 7px;
    cursor: pointer;
    outline: none;
    width: 100%;
    font-family: inherit;
    transition: border-color 0.15s;
}

.control-group select:focus {
    border-color: var(--pastel-blue);
}

#graph-refresh-btn {
    background: var(--bg-panel);
    border: 1px solid var(--border-strong);
    color: var(--text-secondary);
    font-size: 0.82rem;
    padding: 5px 13px;
    border-radius: 7px;
    cursor: pointer;
    align-self: flex-end;
    white-space: nowrap;
    font-family: inherit;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

#graph-refresh-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--pastel-blue);
}

#graph-canvas-wrap {
    flex: 1;
    position: relative;
    padding: 14px 16px 6px;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

#traffic-chart {
    flex: 1;
    min-height: 0;
    display: block !important;
    visibility: visible !important;
}

#graph-loading,
#graph-empty {
    position: absolute;
    inset: 14px 16px 6px 16px;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 0.84rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.8;
    background: var(--bg-panel);
    z-index: 10;
    border-radius: 6px;
}

#graph-stats {
    display: flex;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg-panel-alt);
}

.stat-box {
    flex: 1;
    text-align: center;
    padding: 10px 4px;
    border-right: 1px solid var(--border);
}

.stat-box:last-child { border-right: none; }

.stat-label {
    font-size: 0.66rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    margin-bottom: 3px;
}

.stat-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}