:root {
    --abyss: #04111f;
    --deep:  #0a2a43;
    --teal:  #18c4b4;
    --foam:  #eafcff;
    --dim:   rgba(234,252,255,.55);
    --glass: rgba(234,252,255,.08);
    --hair:  rgba(234,252,255,.14);
    --warn:  #ffab40;
  }
  * { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
  html, body { margin: 0; min-height: 100%; }
  html { background: var(--deep); }
  body {
    background: linear-gradient(180deg, var(--abyss) 0%, #061a2e 45%, var(--deep) 100%);
    color: var(--foam);
    font-family: system-ui, Roboto, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  .wrap { max-width: 640px; margin: 0 auto; padding: max(env(safe-area-inset-top), 20px) 16px 40px; }

  header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 18px; }
  .brand { font-size: 30px; font-weight: 800; letter-spacing: -1.2px; }
  .brand b { color: var(--teal); }
  .tag { font-size: 11px; letter-spacing: 3px; text-transform: uppercase; color: var(--dim); }

  h2 { font-size: 12px; letter-spacing: 3px; text-transform: uppercase; color: var(--dim); font-weight: 600; margin: 22px 0 10px; }

  .cam { background: var(--glass); border: 1px solid var(--hair); border-radius: 16px; padding: 14px; margin-bottom: 12px; }
  .cam-name { font-size: 17px; font-weight: 700; margin: 0 0 12px; }
  .open {
    display: block; text-align: center; text-decoration: none;
    background: var(--teal); color: var(--abyss); font-weight: 800; font-size: 17px;
    padding: 15px; border-radius: 12px;
  }
  .open:active { filter: brightness(.85); }
  .more { display: flex; gap: 24px; margin-top: 4px; font-size: 15px; }
  .more a, .more button { color: var(--teal); background: none; border: 0; padding: 12px 0; font: inherit; cursor: pointer; text-decoration: none; }

  .settings { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--hair); font-size: 14px; color: var(--dim); }
  .settings label { display: block; color: var(--foam); font-weight: 600; margin-bottom: 8px; }
  select {
    width: 100%; font: inherit; font-size: 16px; color: var(--foam);
    background: var(--glass); border: 1px solid var(--hair); border-radius: 12px; padding: 12px;
  }
  select option { background: var(--abyss); }
  .tip { line-height: 1.45; margin: 12px 0 0; }
  .tip b, .tip code { color: var(--foam); }
  .tip a, .back { color: var(--teal); }
  .setup-link { display: inline-block; margin-top: 10px; padding: 10px 0; color: var(--teal); font-size: 15px; text-decoration: none; }

  /* player setup page */
  .back { display: inline-block; padding: 8px 0; margin-bottom: 6px; text-decoration: none; font-size: 15px; }
  .guide { font-size: 15px; line-height: 1.5; }
  .guide h2 { margin: 30px 0 4px; padding-top: 18px; border-top: 1px solid var(--hair);
              font-size: 22px; font-weight: 800; letter-spacing: -.3px; text-transform: none; color: var(--teal); }
  .guide ol, .guide ul { padding-left: 22px; margin: 8px 0; }
  .guide li { margin: 6px 0; }
  .guide pre { background: var(--glass); border: 1px solid var(--hair); border-radius: 10px; padding: 12px; overflow-x: auto; font-size: 14px; }
  .guide b, .guide code { color: var(--foam); }
  .guide a { color: var(--teal); }
  .guide p { color: var(--dim); }
  footer { margin-top: 18px; font-size: 12px; color: var(--dim); }
  footer .ver { margin-top: 16px; font-size: 11px; font-variant-numeric: tabular-nums; }
  .error { color: var(--warn); }

  /* in-page player */
  #player { position: fixed; inset: 0; background: #000; display: none; flex-direction: column; z-index: 10; }
  #player.on { display: flex; }
  #player video { flex: 1; width: 100%; min-height: 0; background: #000; }
  .bar { display: flex; align-items: center; justify-content: space-between; gap: 12px;
         padding: max(env(safe-area-inset-top), 10px) 14px 10px; font-size: 14px; }
  .bar button { background: var(--glass); color: var(--foam); border: 1px solid var(--hair); border-radius: 10px;
                font: inherit; padding: 8px 14px; cursor: pointer; }
  #status { color: var(--dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }