:root {
  --ink: #f6ead7;
  --muted: #cbb79a;
  --bg: #140e0a;
  --panel: rgba(28, 18, 12, 0.82);
  --accent: #d08a4a;
  --line: rgba(242, 214, 162, 0.28);
  --serif: "Iowan Old Style", "Palatino Linotype", "Songti TC", "Noto Serif TC", serif;
  --sans: "Avenir Next", "PingFang TC", "Noto Sans TC", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
}

#boot {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(ellipse at 50% 20%, rgba(180, 80, 40, 0.28), transparent 55%),
    linear-gradient(160deg, #1c120c 0%, #0d0907 70%);
}

.boot-card {
  max-width: 520px;
  text-align: center;
}

.eyebrow {
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 16px;
}

.boot-card h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 6vw, 3.4rem);
  margin: 0;
  letter-spacing: 0.08em;
}

.sub {
  margin: 12px 0 0;
  color: var(--muted);
}

.hint {
  margin: 28px 0;
  color: #a89274;
  font-size: 14px;
  line-height: 1.6;
}

#enter-btn,
#hud button {
  appearance: none;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(90, 42, 22, 0.9), rgba(48, 24, 14, 0.95));
  color: var(--ink);
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 0.08em;
  cursor: pointer;
}

#enter-btn:hover,
#hud button:hover {
  border-color: #f2d6a2;
}

#hud {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px 20px 22px;
}

#vr-canvas {
  position: fixed !important;
  inset: 0 !important;
  z-index: 1 !important;
  display: block !important;
}

#hud .hud-top,
#hud .hud-bottom {
  pointer-events: none;
}

#hud button {
  pointer-events: auto;
  margin-right: 8px;
}

.vr-cta {
  border-color: #f2d6a2 !important;
  background: linear-gradient(180deg, rgba(180, 70, 30, 0.95), rgba(90, 30, 12, 0.98)) !important;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 12px 22px !important;
}

.hud-top {
  max-width: min(520px, 90vw);
  padding: 14px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.hud-top strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.hud-top span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.room-buttons {
  pointer-events: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: min(720px, 92vw);
  margin: 12px 0;
}

.room-buttons button {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(28, 18, 12, 0.88);
  color: var(--ink);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
}

.room-buttons button:hover {
  border-color: #f2d6a2;
}

.hidden {
  display: none !important;
}

a-scene {
  width: 100%;
  height: 100%;
  display: block;
}