:root {
      --bg: #0b0b10;
      --card: #141421;
      --muted: #a0a3ad;
      --text: #f3f4f8;
      --accent: #8a8fff;
    }
    * { box-sizing: border-box; }
    html, body { height: 100%; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Inter, Helvetica, Arial, sans-serif;
      background: radial-gradient(1200px 600px at 50% -200px, #151528, #0a0a12) fixed;
      color: var(--text);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      /* space for fixed tab bar (matches index.html) */
      padding-bottom: calc(78px + env(safe-area-inset-bottom));
      display: grid;
      grid-template-rows: auto 1fr;
    }
    header {
      position: sticky; top: 0; z-index: 10;
      backdrop-filter: saturate(180%) blur(14px);
      background: rgba(10,10,18,.65);
      border-bottom: 1px solid rgba(255,255,255,.08);
      padding-top: env(safe-area-inset-top);
    }
    .wrap { max-width: 960px; margin: 0 auto; padding: 12px 16px; }
    .title { font-weight: 800; letter-spacing: .2px; font-size: 20px; }
    .bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
    .btn {
      display:inline-block;
      padding:8px 16px;
      font-size:14px;
      border-radius:10px;
      border:1px solid rgba(255,255,255,0.2);
      background:rgba(255,255,255,0.08);
      color:#f3f4f8;
      text-decoration:none;
    }
    .muted { color: var(--muted); font-size: 12px; }
    .viewer {
      height: 100%;
      width: 100%;
      border: 0;
      background: var(--bg);
    }
    .fallback {
      height: 100%;
      display: grid;
      place-items: center;
      text-align: center;
      padding: 24px;
      background: linear-gradient(180deg, rgba(255,255,255,.03), transparent), var(--card);
      border-top: 1px solid rgba(255,255,255,.06);
    }

    /* --- Bottom tab bar (same style as index) --- */
    .tabbar {
      position: fixed;
      left: 0; right: 0; bottom: 0;
      z-index: 20;
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      align-items: end;
      gap: 4px;
      padding: 10px 10px calc(10px + env(safe-area-inset-bottom));
      border-top: 1px solid rgba(255,255,255,.08);
      background: rgba(180,180,180,0.20); /* grayish background */
      backdrop-filter: saturate(180%) blur(14px);
    }
    .tabbar a {
      text-decoration: none;
      color: var(--muted);
      text-align: center;
    }
    .tabbar .item {
      display: grid;
      gap: 5px;
      justify-items: center;
      font-size: 11px;
      font-weight: 650;
    }
    .tabbar .item img {
      width: 25px; height: 25px;
      display: block;
      opacity: .8;
      filter: grayscale(100%);
    }
    .tabbar a.active { color: var(--accent); }
    .tabbar a.active img { opacity: 1; filter: brightness(0) saturate(100%) invert(61%) sepia(39%) saturate(1470%) hue-rotate(203deg) brightness(101%) contrast(101%); }

    /* --- Centered map buttons --- */
.centerwrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 90px; /* extra bottom space for tab bar */
  display: grid;
  place-items: center;
}

.map-buttons {
  display: grid;
  gap: 16px;
  width: 100%;
}

@media (min-width: 720px) {
  .map-buttons { grid-template-columns: repeat(3, 1fr); }
}

.map-card {
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent), var(--card);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  padding: 18px;
  text-align: center;
}

.mapbtn {
  display: inline-block;
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
}

.map-caption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.mapbtn.unavailable {
  cursor: not-allowed;
  opacity: 0.55;
}