*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 
  html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
  }
 
  body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f5f8;
    display: flex;
    flex-direction: column;
    transition: background 0.2s;
  }

  /* ── Dark mode overrides ── */
  body.dark {
    background: #0d0d0d;
  }
  body.dark .top-bar {
    background: #141414;
    border-bottom-color: #2a2a2a;
  }
  body.dark .top-bar h1 { color: #e0e0e0; }
  body.dark .top-bar .subtitle { color: #666; }
  body.dark .map-container { background: #0d0d0d; }
  body.dark .map-panel {
    background: #1c1c1c;
    border-color: #333;
    box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  }
  body.dark .legend-section-title,
  body.dark .info-panel .info-section-title { color: #555; }
  body.dark .legend-label { color: #ccc; }
  body.dark .legend-row:hover { background: #252525; }
  body.dark .legend-divider,
  body.dark .info-panel hr { border-top-color: #2a2a2a; }
  body.dark .info-panel p { color: #aaa; }
  body.dark .info-panel a { color: #4a9edd; }
  body.dark .zoom-btn,
  body.dark .map-btn {
    background: #1c1c1c;
    border-color: #333;
    color: #ccc;
  }
  body.dark .zoom-btn:hover,
  body.dark .map-btn:hover { background: #252525; }
  body.dark .zoom-btn { color: #ccc; }
  body.dark .map-btn svg rect,
  body.dark .map-btn svg path { stroke: #aaa; fill: #aaa; }
  body.dark .map-btn svg path { fill: none; }

  /* dark mode legend swatches */
  body.dark .swatch-interchange { background: #d0d0d0; }
  body.dark .swatch-interchange::after { background: #1c1c1c; }
  body.dark .swatch-poi { background: #999999; }
  body.dark .swatch-hosp { background: #999999; }
  body.dark .swatch-fwy { background: #2a2a2a; }
  body.dark .swatch-fwy::after { background: #2a2a2a; color: #888; }
  body.dark .parks-swatch { background: #1f4a23 !important; border-color: #2d6b30 !important; }

  /* ── Top bar ── */
  .top-bar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 1rem;
    height: 52px;
    border-bottom: 1px solid #ddd;
    z-index: 30;
    background: #f5f5f8;
    position: relative;
    transition: background 0.2s, border-color 0.2s;
  }
 
  .top-bar h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: -0.01em;
    white-space: nowrap;
  }

  .top-bar-center {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
 
  .top-bar .subtitle {
    font-size: 1rem;
    color: #999;
    white-space: nowrap;
  }
  .sub-bar {
    background: #f5f5f8;
    text-align: center;
    padding: 5px 12px;
    font-size: 1rem;
    white-space: nowrap;
  }
  
  .sub-bar a {
    color: #999;
    text-decoration: none;
  }
  
  .sub-bar a:hover {
    color: #2c8ab8;
  }

  /* ── Dark mode toggle button ── */
  .dark-toggle {
    position: absolute;
    left: 10px;
    top: 10px;
    transform: none;  
    background: #ffffff;
    border: 1px solid #bbb;
    border-radius: 6px;
    width: 34px;
    height: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #555;
    transition: background 0.12s, border-color 0.2s;
    z-index: 20;
  }
  .dark-toggle:hover { background: #e8e8e8; }
  body.dark .dark-toggle {
    border-color: #444;
    background: #1c1c1c;
  }
  body.dark .dark-toggle:hover { background: #252525; }

  /* ── Map fills remaining height ── */
  .map-container {
    position: relative;
    flex: 1 1 0;
    min-height: 0;
    background: #fff;
    overflow: hidden;
    cursor: grab;
    transition: background 0.2s;
  }
  .map-container.panning { cursor: grabbing; }
 
  #map-svg-wrapper {
    width: 100%;
    height: 100%;
    display: block;
    overflow: hidden;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
  }
 
  #map-svg-wrapper svg {
    width: 100%;
    height: 100%;
    display: block;
  }
 
  /* ── Zoom controls ── */
  .zoom-controls {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    z-index: 20;
  }
  .zoom-btn {
    width: 30px;
    height: 30px;
    background: #fff;
    border: 1px solid #bbb;
    border-radius: 5px;
    font-size: 18px;
    font-weight: 300;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
    color: #333;
    transition: background 0.1s;
    user-select: none;
  }
  .zoom-btn:hover { background: #f0f0f0; }
  .zoom-btn.zoom-reset { font-size: 11px; font-weight: 600; letter-spacing: -0.03em; }

  /* ── Shared top-right button styles ── */
  .map-btn {
    position: absolute;
    right: 10px;
    background: #fff;
    border: 1px solid #bbb;
    border-radius: 6px;
    padding: 6px 11px 6px 9px;
    font-size: 12px;
    font-weight: 600;
    font-family: Arial, Helvetica, sans-serif;
    color: #222;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    z-index: 20;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
    transition: background 0.12s;
  }
  .map-btn:hover { background: #f5f5f5; }
  .map-btn svg { flex-shrink: 0; }
  .map-btn .arrow { transition: transform 0.18s; }
  .map-btn.open .arrow { transform: rotate(180deg); }

  .legend-btn { top: 10px; }
  .info-btn { top: 48px; }
 
  /* ── Shared panel styles ── */
  .map-panel {
    position: absolute;
    right: 10px;
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 7px;
    padding: 12px 14px 10px;
    min-width: 210px;
    z-index: 20;
    box-shadow: 0 4px 16px rgba(0,0,0,0.13);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px);
    transition: opacity 0.18s, transform 0.18s, background 0.2s, border-color 0.2s;
  }
  .map-panel.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .legend-panel { top: 44px; }
  .info-panel {
    top: 82px;
    max-width: 260px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .info-panel .info-section-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #888;
    margin-bottom: 8px;
    margin-top: 4px;
  }
  .info-panel .info-section-title:first-child { margin-top: 0; }
  .info-panel hr { border: none; border-top: 1px solid #eee; margin: 8px 0; }
  .info-panel p {
    font-size: 12px;
    color: #333;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.55;
    margin-bottom: 6px;
  }
  .info-panel p:last-child { margin-bottom: 0; }
  .info-panel a { color: #0070c9; text-decoration: none; }
  .info-panel a:hover { text-decoration: underline; }

  /* ── Legend styles ── */
  .legend-section-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #888;
    margin-bottom: 8px;
    margin-top: 4px;
  }
  .legend-section-title:first-child { margin-top: 0; }
  .legend-divider { border: none; border-top: 1px solid #eee; margin: 8px 0; }
 
  .legend-row {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 3px 0;
    cursor: pointer;
    border-radius: 4px;
    transition: opacity 0.15s;
    user-select: none;
  }
  .legend-row:hover { background: #f8f8f8; }
  .legend-row.hidden { opacity: 0.35; }
  .legend-row input[type="checkbox"] {
    width: 14px;
    height: 14px;
    margin: 0;
    cursor: pointer;
    accent-color: #444;
    flex-shrink: 0;
  }

  /* ── Shared backdrop ── */
  .map-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 19;
  }
  .map-backdrop.open { display: block; }
 
  .swatch-line {
    width: 28px;
    height: 4px;
    border-radius: 2px;
    flex-shrink: 0;
  }
 
  .swatch-fwy {
    width: 28px;
    height: 8px;
    border-radius: 2px;
    flex-shrink: 0;
    position: relative;
    display: inline-block;
  }
  .swatch-fwy::after {
    content: "M5";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #dfdfdfff;
    color: white;
    font-size: 9px;
    font-weight: 700;
    line-height: 1;
    border-radius: 2px;
    font-family: Arial, Helvetica, sans-serif;
  }
 
  .swatch-interchange {
    width: 16px;
    height: 16px;
    background: #333;
    border-radius: 2px;
    position: relative;
    flex-shrink: 0;
  }
  .swatch-interchange::after {
    content: "";
    position: absolute;
    inset: 2.5px;
    background: #fff;
    border-radius: 1px;
  }
 
  .swatch-poi {
    width: 16px;
    height: 16px;
    background: #7a7a7a;
    border-radius: 2px;
    position: relative;
    flex-shrink: 0;
  }
  .swatch-poi::after {
    content: "★";
    position: absolute;
    inset: 0;
    color: white;
    font-size: 14px;
    line-height: 16px;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
  }
 
  .swatch-hosp {
    width: 16px;
    height: 16px;
    background: #7a7a7a;
    border-radius: 2px;
    position: relative;
    flex-shrink: 0;
  }
  .swatch-hosp::after {
    content: "+";
    position: absolute;
    inset: 0;
    color: white;
    font-size: 21px;
    font-weight: 700;
    line-height: 16px;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
  }
 
  .swatch-rect {
    width: 16px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
  }
 
  .legend-label {
    font-size: 12px;
    color: #222;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.3;
  }
 
  .loading {
    padding: 3rem 2rem;
    text-align: center;
    color: #888;
    font-size: 14px;
  }
 
  /* ── Mobile ── */
  @media (max-width: 768px) {
    .top-bar h1 { font-size: 0.9rem; }
    .top-bar .subtitle { font-size: 0.75rem; }
    .legend-panel, .info-panel {
      right: 0; left: 0;
      top: auto; bottom: 0;
      width: 100%; max-width: 100%;
      max-height: 70vh;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
      border-radius: 12px 12px 0 0;
      transform: translateY(100%);
      padding-bottom: env(safe-area-inset-bottom, 16px);
    }
    .legend-panel.open, .info-panel.open { transform: translateY(0); }
    .zoom-controls { bottom: 16px; right: 12px; gap: 6px; }
    .zoom-btn { width: 38px; height: 38px; font-size: 20px; }
  }
 
  @media (max-height: 500px) and (orientation: landscape) {
    .legend-panel, .info-panel { max-height: 50vh; }
    .zoom-controls { bottom: 8px; }
  }