:root {
    --zeri-blue: #4F90CC;
    --zeri-blue-dark: #1d5a8e;
    --text-primary: #1a1a18;
    --text-secondary: #555;
    --text-muted: #888;
    --border: #e0ddd5;
    --surface: rgba(255, 255, 255, 0.92);
    --bg-chip: #f0f5fb;
}

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

body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    overflow: hidden;
}

/* ── Full-screen map ── */
#map {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
}

.leaflet-tile-pane {
    filter: saturate(0.65) brightness(0.97);
}

.leaflet-control-attribution {
    font-size: 10px !important;
}

/* ── Left floating panel ── */
#left-panel {
    position: fixed;
    top: 24px;
    left: 24px;
    width: 280px;
    background: var(--surface);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.10);
    padding: 20px 22px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#panel-header {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

#panel-header h3 {
    flex: 1;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-muted);
    line-height: 1.4;
    letter-spacing: 0.01em;
}

/* ── Year view ── */
#year-label {
    display: block;
    font-size: 40px;
    font-weight: 700;
    color: var(--zeri-blue);
    letter-spacing: -1px;
    line-height: 1;
}

/* ── City view ── */
#city-header {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

#city-header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#city-year-display {
    font-size: 13px;
    font-weight: 600;
    color: var(--zeri-blue);
    letter-spacing: 0.02em;
}

#city-name-display {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    line-height: 1.1;
}

/* ── Chips row ── */
.chips-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.stat-chip {
    background: var(--bg-chip);
    border: 1px solid #c9ddf0;
    border-radius: 20px;
    padding: 5px 14px;
    font-size: 13px;
    color: var(--zeri-blue-dark);
    display: flex;
    align-items: center;
    gap: 5px;
}

.stat-chip strong {
    font-weight: 700;
    color: var(--zeri-blue-dark);
    font-variant-numeric: tabular-nums;
}

.ctrl-btn-sm {
    width: 24px;
    height: 24px;
    font-size: 15px;
}

/* ── Floating controls (bottom center) ── */
#controls {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: var(--surface);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 12px 20px;
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.10);
}

#controls-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ctrl-btn {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: #fff;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    transition: background 0.15s, color 0.15s;
    flex-shrink: 0;
}

.ctrl-btn:hover {
    background: var(--bg-chip);
    color: var(--zeri-blue-dark);
    border-color: #c9ddf0;
}

/* ── Progress bar ── */
#progress-track {
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

#progress-bar {
    height: 100%;
    width: 0%;
    background: var(--zeri-blue);
    border-radius: 2px;
}

/* ── Offcanvas info ── */
.offcanvas {
    max-width: 420px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.offcanvas-header {
    border-bottom: 1px solid var(--border);
    padding: 20px 24px 16px;
}

.offcanvas-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}

.offcanvas-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.info-section h6 {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--zeri-blue);
    margin-bottom: 10px;
}

.info-section p, .info-section ul {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
}