:root {
  --bg: #06141e;
  --panel: rgba(8, 24, 35, 0.86);
  --panel-solid: #0b2130;
  --line: rgba(143, 211, 238, 0.18);
  --ink: #eef5f9;
  --muted: #9bb2c0;
  --accent: #5fc8f0;
  --gold: #ffb84d;
  --radius: 14px;
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--ink);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); overflow: hidden; }
canvas#view { position: fixed; inset: 0; width: 100vw; height: 100vh; display: block; touch-action: none; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: var(--accent); }

/* top bar */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; display: flex; align-items: center; gap: 16px;
  padding: 14px 16px; pointer-events: none;
  background: linear-gradient(to bottom, rgba(6, 20, 30, 0.82), rgba(6, 20, 30, 0));
}
.topbar > * { pointer-events: auto; }
.brand-title { font-family: Manrope, Inter, sans-serif; font-weight: 800; font-size: 22px; letter-spacing: -0.01em; }
.brand-sub { font-size: 13px; color: var(--muted); }
.groups { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--line); font-size: 14px; font-weight: 600;
  backdrop-filter: blur(8px);
}
.chip:hover, .chip.on { border-color: var(--accent); color: #fff; }
.chip.on { background: rgba(95, 200, 240, 0.18); }
.chip svg { width: 18px; height: 18px; stroke: currentColor; stroke-width: 2; fill: none; }
a.chip { color: var(--ink); text-decoration: none; }
.site-link { border-color: rgba(255, 184, 77, 0.45); }
.site-link:hover { border-color: var(--gold); color: #fff; }

.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  backdrop-filter: blur(10px); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

/* scene list */
.scenes {
  position: fixed; top: 76px; left: 16px; width: 300px; max-height: calc(100vh - 170px); overflow-y: auto;
  padding: 10px; transition: transform 0.25s ease, opacity 0.25s ease;
}
.scenes.hidden { transform: translateX(-110%); opacity: 0; pointer-events: none; }
.scenes h2 {
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
  margin: 12px 8px 6px; font-weight: 700;
}
.scenes h2:first-child { margin-top: 4px; }
.scene {
  display: block; width: 100%; text-align: left; background: transparent; border: 1px solid transparent;
  border-radius: 10px; padding: 10px 12px; margin: 2px 0;
}
.scene:hover { background: rgba(255, 255, 255, 0.05); }
.scene.on { border-color: var(--accent); background: rgba(95, 200, 240, 0.12); }
.scene .t { font-weight: 600; font-size: 15px; }
.scene .s { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.scene .m { font-size: 11.5px; color: var(--muted); margin-top: 6px; opacity: 0.85; }

/* about */
.about {
  position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 48px); overflow-y: auto; padding: 26px 28px 22px; background: var(--panel-solid);
  line-height: 1.55; font-size: 15px; z-index: 5;
}
.about[hidden] { display: none; }
.about h1 { font-family: Manrope, Inter, sans-serif; font-size: 28px; margin: 0 0 10px; }
.about ul { padding-left: 20px; margin: 6px 0 12px; }
.about li { margin: 4px 0; }
.about .muted { color: var(--muted); }
.about-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px;
  font-size: 12.5px; color: var(--muted); flex-wrap: wrap; }
.close { position: absolute; top: 10px; right: 14px; background: none; border: 0; font-size: 26px; color: var(--muted); }
.primary { background: var(--accent); color: #04202c; border: 0; border-radius: 999px; padding: 10px 18px; font-weight: 700; }

/* loading + toast */
.loading {
  position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(380px, calc(100vw - 32px));
  padding: 18px 20px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  text-align: center; z-index: 4;
}
.loading[hidden], .toast[hidden], .help[hidden] { display: none; }
.loading-label { font-weight: 600; margin-bottom: 12px; }
.loading-sub { font-size: 12.5px; color: var(--muted); margin-top: 10px; }
.bar { height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.12); overflow: hidden; }
.bar > div { height: 100%; width: 0; background: var(--accent); transition: width 0.15s linear; }
.toast {
  position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%); padding: 10px 16px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--line); font-size: 14px; z-index: 4; max-width: calc(100vw - 32px);
}

/* help */
.help { position: fixed; right: 16px; bottom: 92px; padding: 14px 16px; font-size: 13.5px; line-height: 1.9; max-width: 340px; }
.muted-help { color: var(--muted); line-height: 1.5; margin-top: 6px; font-size: 12.5px; }
kbd {
  font-family: inherit; font-size: 12px; padding: 1px 7px; border-radius: 6px; border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
}

/* bottom controls */
.controls {
  position: fixed; left: 0; right: 0; bottom: 0; display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 14px 16px calc(14px + env(safe-area-inset-bottom)); flex-wrap: wrap;
  background: linear-gradient(to top, rgba(6, 20, 30, 0.85), rgba(6, 20, 30, 0));
}
.scene-name { position: absolute; left: 18px; bottom: 74px; font-size: 13px; color: var(--muted); text-shadow: 0 1px 4px #000; }
.group { display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--panel); border: 1px solid var(--line); }
.ctl {
  min-width: 38px; height: 36px; padding: 0 10px; border-radius: 999px; border: 0; background: transparent;
  font-size: 14px; font-weight: 600;
}
.ctl.wide { padding: 0 14px; }
.ctl:hover { background: rgba(255, 255, 255, 0.08); }
.ctl[aria-pressed="true"] { background: rgba(95, 200, 240, 0.22); color: #fff; }
.ctl.gold { color: var(--gold); }
.speed { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); padding: 0 6px 0 12px; }
.speed select { background: transparent; color: var(--ink); border: 0; font: inherit; font-weight: 600; }
.speed option { background: var(--panel-solid); }

@media (max-width: 860px) {
  .brand-sub, .groups .chip[data-group], .scene-name, .site-link span { display: none; }
  .scenes { top: 70px; width: calc(100vw - 32px); max-height: 50vh; }
  .controls { gap: 8px; padding-bottom: calc(10px + env(safe-area-inset-bottom)); }
  .ctl.wide { padding: 0 10px; font-size: 13px; }
}