:root {
  --bg: #03060c;
  --fg: #f0f4fa;
  --fg-dim: rgba(220, 230, 244, 0.62);
  --fg-faint: rgba(200, 215, 232, 0.34);

  /* Monochrome palette: blues + greys only. No green/orange/red/purple. */
  --blue-deep:   #1f3358;
  --blue-mid:    #4a78c8;
  --blue-sky:    #7eb0ff;
  --blue-pale:   #cfe1fb;

  --grey-deep:   #2a323e;
  --grey-mid:    #5c6878;
  --grey-light:  #98a2b0;

  --accent:      var(--blue-sky);
  --glow:        rgba(126, 176, 255, 0.55);

  --glass:       rgba(14, 20, 36, 0.55);
  --glass-edge:  rgba(180, 200, 230, 0.08);
  --ease:        cubic-bezier(0.32, 0.72, 0, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
  font-family: system-ui, -apple-system, 'SF Pro Display', 'SF Pro Text', 'Inter', sans-serif;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.005em;
}

canvas#stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  touch-action: none;
}

/* ── File drop overlay ── */
#file-drop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  cursor: pointer;
  transition: opacity 0.9s var(--ease);
  background: radial-gradient(circle at 50% 55%, rgba(40, 80, 160, 0.0) 0%, rgba(3, 6, 12, 0.0) 60%);
}

#file-drop.dragging {
  background: radial-gradient(circle at 50% 55%, rgba(126, 176, 255, 0.18) 0%, rgba(3, 6, 12, 0.0) 60%);
}

#file-drop input[type="file"] {
  position: absolute;
  width: 0; height: 0;
  opacity: 0;
  pointer-events: none;
}

#file-drop .drop-inner {
  text-align: center;
  padding: 36px 64px;
  border-radius: 22px;
  background: rgba(10, 18, 36, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(28px) saturate(150%);
  -webkit-backdrop-filter: blur(28px) saturate(150%);
  transition: transform 0.6s var(--ease), opacity 0.6s var(--ease);
}

#file-drop:hover .drop-inner { transform: translateY(-2px); }
#file-drop.dragging .drop-inner { transform: scale(1.04); }

#file-drop .drop-title {
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--fg);
}

#file-drop .drop-sub {
  font-size: 13px;
  color: var(--fg-dim);
  letter-spacing: 0.01em;
}

#file-drop.loaded {
  opacity: 0;
  pointer-events: none;
}

/* ── Transport bar ── */
#transport {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translate(-50%, 14px);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 18px 10px 12px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(28px) saturate(150%);
  -webkit-backdrop-filter: blur(28px) saturate(150%);
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  width: min(560px, calc(100vw - 32px));
}

#transport.active {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

#transport .play-btn {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

#transport .play-btn:hover { background: rgba(255, 255, 255, 0.13); }
#transport .play-btn:active { transform: scale(0.93); }
#transport .play-btn svg { width: 16px; height: 16px; }
#transport .play-btn .icon-pause { display: none; }
#transport.playing .play-btn .icon-play { display: none; }
#transport.playing .play-btn .icon-pause { display: block; }

#transport .track-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.005em;
}

#transport .scrub-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

#transport .scrub {
  position: relative;
  flex: 1;
  height: 18px;
  display: flex;
  align-items: center;
  cursor: pointer;
  touch-action: none;
}

#transport .scrub::before {
  content: '';
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  height: 2px;
  background: rgba(255, 255, 255, 0.14);
  border-radius: 1px;
  transform: translateY(-50%);
}

#transport .scrub-bar {
  position: absolute;
  left: 0; top: 50%;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--blue-mid) 0%, var(--blue-pale) 100%);
  border-radius: 1px;
  transform: translateY(-50%);
  pointer-events: none;
  box-shadow: 0 0 8px var(--glow);
}

#transport .scrub-handle {
  position: absolute;
  top: 50%;
  left: 0%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fg);
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s var(--ease);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.5);
}

#transport:hover .scrub-handle { opacity: 1; }

#transport .time-current,
#transport .time-total {
  font-size: 11px;
  color: var(--fg-faint);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  min-width: 34px;
  text-align: center;
}

/* ── FPS counter (top-right, subtle) ── */
#fps-counter {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 20;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(14, 20, 38, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--fg-faint);
  pointer-events: none;
  user-select: none;
  transition: color 0.4s var(--ease);
}
#fps-counter.good { color: var(--blue-sky); text-shadow: 0 0 6px var(--glow); }
#fps-counter.okay { color: var(--grey-light); }
#fps-counter.low  { color: var(--grey-mid); }

/* ── VR controls (bottom-left glass pill) ── */
#vr-controls {
  position: fixed;
  bottom: 28px;
  left: 28px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px 6px 14px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(28px) saturate(150%);
  -webkit-backdrop-filter: blur(28px) saturate(150%);
  z-index: 20;
  font-size: 12px;
}

#vr-controls .vr-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-right: 12px;
  margin-right: 4px;
  border-right: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--fg-dim);
  letter-spacing: 0.01em;
  font-size: 11px;
  user-select: none;
  white-space: nowrap;
}

#vr-controls .vr-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grey-mid);
  box-shadow: 0 0 4px rgba(120, 132, 152, 0.4);
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease);
  flex: 0 0 auto;
}
#vr-controls .vr-status-dot.red   { background: var(--grey-light); box-shadow: 0 0 6px rgba(152, 162, 176, 0.6); }
#vr-controls .vr-status-dot.amber { background: var(--blue-deep);  box-shadow: 0 0 8px rgba(74, 120, 200, 0.55); }
#vr-controls .vr-status-dot.ready { background: var(--blue-mid);   box-shadow: 0 0 10px rgba(74, 120, 200, 0.70); }
#vr-controls .vr-status-dot.on    { background: var(--blue-sky);   box-shadow: 0 0 14px var(--glow); }

#vr-controls .vr-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--fg);
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease),
              opacity 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}

#vr-controls .vr-btn svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
}

#vr-controls .vr-btn:not(:disabled):hover  { background: rgba(255, 255, 255, 0.13); }
#vr-controls .vr-btn:not(:disabled):active { transform: scale(0.94); }
#vr-controls .vr-btn:disabled              { opacity: 0.35; cursor: default; }

/* Microphone-input picker — lives INSIDE the #vr-controls pill as a
   compact icon-only button sibling to the VR toggle. The picker
   menu pops up above the pill on click. */
.mic-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--fg);
  cursor: pointer;
  position: relative;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.mic-btn svg     { width: 14px; height: 14px; }
.mic-btn:hover   { background: rgba(255, 255, 255, 0.13); }
.mic-btn:active  { transform: scale(0.94); }
.mic-menu {
  position: absolute;
  left: 0;
  bottom: 36px;
  min-width: 220px;
  max-width: 380px;
  max-height: 60vh;
  overflow-y: auto;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(28px) saturate(150%);
  -webkit-backdrop-filter: blur(28px) saturate(150%);
  border-radius: 10px;
  padding: 4px 0;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.5);
  z-index: 100;
}
.mic-menu-head {
  padding: 4px 14px;
  opacity: 0.55;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 10px;
  color: var(--fg-dim);
}
.mic-row {
  display: block;
  width: 100%;
  text-align: left;
  padding: 7px 14px;
  background: none;
  color: var(--fg);
  border: none;
  cursor: pointer;
  font: inherit;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mic-row.current { color: var(--blue-sky); }
.mic-row:hover   { background: rgba(255, 255, 255, 0.08); }

#vr-controls .vr-btn.active {
  background: rgba(126, 176, 255, 0.16);
  border-color: rgba(126, 176, 255, 0.42);
  color: var(--blue-pale);
  box-shadow: inset 0 0 12px rgba(126, 176, 255, 0.14),
              0 0 14px rgba(126, 176, 255, 0.20);
}

#vr-controls .tpv-btn {
  width: 32px;
  padding: 0;
}

#vr-controls .vr-toast {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 0;
  max-width: 320px;
  padding: 9px 14px;
  border-radius: 12px;
  background: rgba(20, 30, 56, 0.88);
  border: 1px solid rgba(126, 176, 255, 0.24);
  color: var(--blue-pale);
  font-size: 12px;
  line-height: 1.35;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  pointer-events: none;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  white-space: normal;
}
#vr-controls .vr-toast.show {
  opacity: 1;
  transform: translateY(0);
}


/* ── Boot spinner ─────────────────────────────────────────────────
 * Full-viewport overlay shown from page-load until the app's main
 * module has finished its first useful frame. Both apps include the
 * <div id="boot-spinner"> markup in their index.html and import
 * hideBootSpinner from VRBasics/ui/BootSpinner.js to dismiss it.
 * Uses the project's blue + grey palette only.                    */
#boot-spinner {
  position: fixed; inset: 0; z-index: 99999;
  background: var(--bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 18px;
  transition: opacity 0.5s var(--ease);
}
#boot-spinner.done {
  opacity: 0;
  pointer-events: none;
}
#boot-spinner .ring {
  width: 44px; height: 44px;
  border: 3px solid rgba(180, 200, 230, 0.10);
  border-top-color: var(--blue-sky);
  border-radius: 50%;
  animation: boot-spin 0.8s linear infinite;
}
#boot-spinner .label {
  color: var(--fg-dim);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
@keyframes boot-spin {
  to { transform: rotate(360deg); }
}