@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Barlow:wght@300;600&display=swap');

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

    :root {
      --bg: #f0f4f8;
      --panel: rgba(255, 255, 255, 0.92);
      --accent: #1a73e8;
      --accent2: #e8531a;
      --ok: #1e9e3e;
      --warn: #d97706;
      --text: #1e2a3a;
      --dim: #7a8aa0;
      --border: rgba(26, 115, 232, 0.18);
    }

    html, body { height: 100%; width: 100%; overflow: hidden; background: var(--bg); }

    #map { position: absolute; top: 0; left: 0; right: 0; bottom: 0; }

    /* ── HUD panel ── */
    #hud {
      position: absolute;
      top: 16px; left: 16px;
      width: 280px;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 6px;
      backdrop-filter: blur(12px);
      font-family: 'Share Tech Mono', monospace;
      color: var(--text);
      z-index: 10;
      overflow: hidden;
      box-shadow: 0 2px 16px rgba(26, 115, 232, 0.10), 0 4px 24px rgba(0,0,0,0.10);
    }

    #hud-header {
      background: rgba(26, 115, 232, 0.07);
      border-bottom: 1px solid var(--border);
      padding: 10px 14px;
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      user-select: none;
    }
    #hud-header:hover { background: rgba(26, 115, 232, 0.13); }

    #hud-chevron {
      margin-left: auto;
      font-size: 10px;
      color: var(--dim);
      transition: transform 0.25s ease;
      line-height: 1;
    }

    #hud.collapsed #hud-chevron { transform: rotate(-90deg); }
    #hud.collapsed #hud-header  { border-bottom-color: transparent; }

    #hud-body {
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      overflow: hidden;
      max-height: 700px;
      transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.2s ease;
      opacity: 1;
    }
    #hud.collapsed #hud-body {
      max-height: 0;
      padding-top: 0;
      padding-bottom: 0;
      opacity: 0;
    }

    #hud-header .dot {
      width: 8px; height: 8px;
      border-radius: 50%;
      background: var(--ok);
      box-shadow: 0 0 6px var(--ok);
      animation: pulse 1.4s ease-in-out infinite;
    }
    #hud-header .dot.warn { background: var(--warn); box-shadow: 0 0 6px var(--warn); animation: pulse 1.4s ease-in-out infinite; }
    #hud-header .dot.off  { background: var(--dim);  box-shadow: none; animation: none; }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.3; }
    }

    #hud-header span {
      font-family: 'Barlow', sans-serif;
      font-weight: 600;
      font-size: 11px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent);
    }
    #hud.collapsed #hud-title { display: none; }

    /* Collapsed header mini-info */
    #hud-collapsed-info {
      display: none;
      align-items: center;
      gap: 6px;
      margin-left: 2px;
    }
    #hud.collapsed #hud-collapsed-info { display: flex; }

    .hud-pill {
      font-family: 'Share Tech Mono', monospace;
      font-size: 9px;
      color: var(--text);
      background: rgba(26,115,232,0.08);
      border: 1px solid var(--border);
      border-radius: 3px;
      padding: 1px 5px;
      letter-spacing: 0.04em;
      white-space: nowrap;
    }

    /* Age always shown in header */
    #hud-age-header {
      font-family: 'Share Tech Mono', monospace;
      font-size: 9px;
      color: var(--dim);
      letter-spacing: 0.05em;
    }
    #hud-age-inline { display: none; }


    .metric {
      display: flex;
      flex-direction: column;
      gap: 1px;
    }
    .metric-label {
      font-size: 9px;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: var(--dim);
      margin-top: 6px;
    }
    .metric-value {
      font-size: 22px;
      color: var(--accent);
      letter-spacing: 0.04em;
      line-height: 1.1;
    }
    .metric-value.warn { color: var(--warn); }
    .metric-value.ok   { color: var(--ok); }
    .metric-value small {
      font-size: 11px;
      color: var(--dim);
      margin-left: 4px;
    }

    .sep {
      border: none;
      border-top: 1px solid var(--border);
      margin: 2px 0;
    }

    .progress-wrap {
      display: flex; flex-direction: column; gap: 5px;
    }
    .progress-bar-bg {
      width: 100%; height: 6px;
      background: rgba(0,0,0,0.07);
      border-radius: 3px;
      overflow: hidden;
    }
    .progress-bar-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--accent), var(--ok));
      border-radius: 3px;
      transition: width 0.8s ease;
      box-shadow: 0 0 6px rgba(26, 115, 232, 0.4);
      width: 0%;
    }
    .progress-labels {
      display: flex; justify-content: space-between;
      font-size: 9px; color: var(--dim);
    }

    #last-update {
      font-size: 9px;
      color: var(--dim);
      text-align: right;
      letter-spacing: 0.08em;
    }

    /* ── ETA block ── */
    .eta-block {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .eta-row {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 6px;
    }
    .eta-value {
      font-size: 18px;
      color: var(--accent);
      letter-spacing: 0.03em;
      line-height: 1;
    }
    .eta-confidence {
      font-size: 9px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 2px 6px;
      border-radius: 3px;
      font-family: 'Barlow', sans-serif;
      font-weight: 600;
      white-space: nowrap;
    }
    .eta-confidence.low {
      background: rgba(217, 119, 6, 0.12);
      color: var(--warn);
      border: 1px solid rgba(217, 119, 6, 0.25);
    }
    .eta-confidence.medium {
      background: rgba(26, 115, 232, 0.10);
      color: var(--accent);
      border: 1px solid rgba(26, 115, 232, 0.22);
    }
    .eta-confidence.high {
      background: rgba(30, 158, 62, 0.10);
      color: var(--ok);
      border: 1px solid rgba(30, 158, 62, 0.22);
    }
    .eta-sub {
      font-size: 9px;
      color: var(--dim);
      letter-spacing: 0.06em;
    }

    /* ── Battery widget ── */
    .battery-wrap {
      display: flex;
      align-items: center;
      gap: 7px;
    }
    .battery-icon {
      position: relative;
      width: 28px; height: 14px;
      border: 1.5px solid var(--dim);
      border-radius: 2.5px;
      flex-shrink: 0;
    }
    .battery-icon::after {
      content: '';
      position: absolute;
      right: -5px; top: 50%;
      transform: translateY(-50%);
      width: 3px; height: 6px;
      background: var(--dim);
      border-radius: 0 1.5px 1.5px 0;
    }
    .battery-fill {
      position: absolute;
      left: 1.5px; top: 1.5px; bottom: 1.5px;
      border-radius: 1px;
      transition: width 0.5s ease, background 0.5s ease;
    }
    .battery-label {
      font-size: 11px;
      font-family: 'Share Tech Mono', monospace;
      color: var(--text);
      min-width: 32px;
    }

    /* ── Error toast ── */
    #error-toast {
      position: absolute;
      bottom: 16px; right: 16px;
      background: rgba(255,50,50,0.15);
      border: 1px solid rgba(255,50,50,0.4);
      border-radius: 6px;
      padding: 8px 14px;
      font-family: 'Share Tech Mono', monospace;
      font-size: 11px;
      color: #ff6b6b;
      z-index: 20;
      display: none;
      max-width: 240px;
    }

    /* ── Elevation strip ── */
    #elev-strip {
      position: absolute;
      bottom: 0; left: 0; right: 0;
      background: rgba(255,255,255,0.93);
      border-top: 1px solid var(--border);
      backdrop-filter: blur(10px);
      z-index: 10;
      display: none;
      box-shadow: 0 -2px 16px rgba(26,115,232,0.08);
      transition: bottom 0.3s ease;
    }

    #elev-header {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 5px 14px;
      border-bottom: 1px solid var(--border);
      background: rgba(26,115,232,0.06);
      cursor: pointer;
      user-select: none;
      height: 28px;
    }
    #elev-header:hover { background: rgba(26,115,232,0.12); }
    #elev-header-title {
      font-family: 'Barlow', sans-serif;
      font-weight: 600;
      font-size: 10px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent);
    }
    #elev-header-sub {
      font-family: 'Share Tech Mono', monospace;
      font-size: 9px;
      color: var(--dim);
      margin-left: 4px;
    }
    #elev-chevron {
      margin-left: auto;
      font-size: 10px;
      color: var(--dim);
      transition: transform 0.25s ease;
    }
    #elev-strip.collapsed #elev-chevron { transform: rotate(-90deg); }
    #elev-strip.collapsed #elev-header  { border-bottom-color: transparent; }

    #elev-canvas-wrap {
      height: 110px;
      overflow: hidden;
      transition: height 0.3s ease, opacity 0.2s ease;
      opacity: 1;
      cursor: crosshair;
    }
    #elev-strip.collapsed #elev-canvas-wrap {
      height: 0;
      opacity: 0;
    }

    #elev-strip canvas {
      display: block;
      width: 100%;
      height: 110px;
    }

    /* ── Elevation collapsed toggle button ── */
    #elev-toggle-btn {
      position: absolute;
      bottom: 16px; left: 50%;
      transform: translateX(-50%);
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 5px 14px;
      font-family: 'Barlow', sans-serif;
      font-weight: 600;
      font-size: 10px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--accent);
      cursor: pointer;
      z-index: 11;
      display: none;
      box-shadow: 0 2px 10px rgba(26,115,232,0.15);
      white-space: nowrap;
      backdrop-filter: blur(8px);
    }
    #elev-toggle-btn:hover { background: rgba(26,115,232,0.08); }

    /* ── Center-on-marker toggle ── */
    #center-btn {
      position: absolute;
      top: 16px; right: 16px;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 6px;
      backdrop-filter: blur(12px);
      padding: 7px;
      cursor: pointer;
      z-index: 10;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 2px 10px rgba(26,115,232,0.12);
      transition: background 0.15s, border-color 0.15s;
      user-select: none;
      width: 34px; height: 34px;
    }
    #center-btn:hover { background: rgba(26,115,232,0.08); }
    #center-btn.off {
      border-color: rgba(122,138,160,0.3);
      box-shadow: none;
    }
    #center-btn svg { display: block; }

    /* ── Battery button (below center-btn, top-right) ── */
    #battery-btn {
      position: absolute;
      top: 58px; right: 16px;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 6px;
      backdrop-filter: blur(12px);
      padding: 5px 8px;
      z-index: 10;
      display: none;
      align-items: center;
      gap: 5px;
      box-shadow: 0 2px 10px rgba(26,115,232,0.10);
    }
    #battery-btn .battery-icon { flex-shrink: 0; }
    #battery-btn .battery-label { font-family: 'Share Tech Mono', monospace; font-size: 10px; }

    /* ── View-mode tabs ── */
    .view-tabs {
      display: flex;
      gap: 4px;
      background: rgba(26,115,232,0.06);
      border: 1px solid var(--border);
      border-radius: 5px;
      padding: 3px;
    }
    .view-tab {
      flex: 1;
      font-family: 'Barlow', sans-serif;
      font-weight: 600;
      font-size: 9px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      text-align: center;
      padding: 5px 4px;
      border-radius: 3px;
      cursor: pointer;
      color: var(--dim);
      transition: background 0.15s, color 0.15s;
      user-select: none;
      line-height: 1.3;
    }
    .view-tab.active {
      background: var(--panel);
      color: var(--accent);
      box-shadow: 0 1px 4px rgba(26,115,232,0.12);
    }
    .view-tab .tab-icon { font-size: 12px; display: block; margin-bottom: 2px; }

    /* ── Geoloc status block ── */
    #geoloc-status {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 7px 10px;
      background: rgba(26,115,232,0.05);
      border: 1px solid var(--border);
      border-radius: 5px;
      font-family: 'Share Tech Mono', monospace;
      font-size: 9px;
      color: var(--dim);
    }
    #geoloc-status .geo-dot {
      width: 7px; height: 7px;
      border-radius: 50%;
      background: var(--dim);
      flex-shrink: 0;
    }
    #geoloc-status.acquiring .geo-dot { background: var(--warn); box-shadow: 0 0 5px var(--warn); animation: pulse 1s infinite; }
    #geoloc-status.active    .geo-dot { background: var(--ok);   box-shadow: 0 0 5px var(--ok); animation: pulse 1.4s infinite; }
    #geoloc-status.error     .geo-dot { background: #dc2626; box-shadow: none; animation: none; }

    /* User position marker on map (different from main marker) */
  </style>