html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  background: #02030a !important;
  overflow: hidden;
}
.stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 20%, rgba(37, 63, 103, 0.28), transparent 35%),
    linear-gradient(160deg, #07101d 0%, #02030a 62%, #000 100%);
}
.stage::before,
.stage::after {
  content: "";
  position: absolute;
  inset: -20%;
  pointer-events: none;
}
.stage::before {
  z-index: -2;
  opacity: 0.7;
  background-image:
    radial-gradient(circle, rgba(211, 232, 255, 0.8) 0 1px, transparent 1.6px),
    radial-gradient(circle, rgba(211, 232, 255, 0.45) 0 1px, transparent 1.4px);
  background-size: 83px 89px, 137px 151px;
  background-position: 0 0, 31px 42px;
  animation: drift-stars 38s linear infinite;
}
.stage::after {
  z-index: -1;
  background: radial-gradient(ellipse at 50% 88%, rgba(42, 93, 154, 0.26), transparent 48%);
}
.stage-atmosphere {
  position: absolute;
  z-index: 0;
  inset: 18% 12% 12%;
  border: 1px solid rgba(134, 190, 255, 0.15);
  border-radius: 50%;
  box-shadow: 0 0 90px rgba(76, 132, 208, 0.12), inset 0 0 70px rgba(97, 153, 230, 0.08);
  pointer-events: none;
}
.stage[data-stage-theme="halloween"] {
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 97, 0, 0.2), transparent 25%),
    radial-gradient(circle at 14% 30%, rgba(114, 49, 163, 0.35), transparent 31%),
    linear-gradient(160deg, #12071e 0%, #05040d 60%, #000 100%);
}
.stage[data-stage-theme="halloween"]::before {
  opacity: 0.82;
  background-image:
    radial-gradient(circle, rgba(255, 201, 105, 0.9) 0 1px, transparent 1.6px),
    radial-gradient(circle, rgba(178, 113, 255, 0.55) 0 1px, transparent 1.4px);
}
.stage[data-stage-theme="halloween"]::after {
  background:
    radial-gradient(ellipse at 50% 88%, rgba(255, 105, 24, 0.22), transparent 44%),
    radial-gradient(ellipse at 24% 36%, rgba(136, 51, 188, 0.2), transparent 34%);
}
.stage[data-stage-theme="halloween"] .stage-atmosphere {
  border-color: rgba(255, 145, 53, 0.35);
  box-shadow: 0 0 100px rgba(255, 94, 0, 0.2), inset 0 0 75px rgba(145, 62, 205, 0.12);
}
.stage[data-stage-theme="aurora"] {
  background:
    radial-gradient(circle at 50% 18%, rgba(85, 235, 222, 0.17), transparent 28%),
    radial-gradient(circle at 85% 35%, rgba(35, 86, 189, 0.28), transparent 39%),
    linear-gradient(165deg, #021220 0%, #020815 56%, #000 100%);
}
.stage[data-stage-theme="aurora"]::before {
  opacity: 0.7;
  background-image:
    radial-gradient(circle, rgba(166, 255, 242, 0.72) 0 1px, transparent 1.6px),
    radial-gradient(circle, rgba(247, 209, 125, 0.56) 0 1px, transparent 1.4px);
}
.stage[data-stage-theme="aurora"]::after {
  background:
    radial-gradient(ellipse at 50% 90%, rgba(30, 180, 178, 0.15), transparent 47%),
    radial-gradient(ellipse at 12% 42%, rgba(55, 105, 224, 0.18), transparent 38%);
}
.stage[data-stage-theme="aurora"] .stage-atmosphere {
  border-color: rgba(141, 246, 231, 0.27);
  box-shadow: 0 0 120px rgba(66, 202, 215, 0.16), inset 0 0 86px rgba(116, 227, 202, 0.1);
}
.halo {
  position: relative;
  z-index: 1;
  width: 100vw;
  height: 100vh;
  object-fit: contain;
  object-position: center 42%;
  background: transparent !important;
  mix-blend-mode: screen;
}
.signal-stage {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 360ms ease;
}
.stage[data-signal-scene="ready"] .signal-stage {
  opacity: 1;
}
.aurora-stage {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}
.stage[data-aurora-scene="ready"] .aurora-stage {
  opacity: 1;
}
.stage[data-signal-scene="ready"] .halo,
.stage[data-aurora-scene="ready"] .halo {
  visibility: hidden;
}
.stage-title {
  position: fixed;
  z-index: 3;
  top: clamp(24px, 7vh, 72px);
  left: clamp(24px, 5vw, 72px);
  max-width: min(40rem, calc(100vw - 230px));
  color: #f6f1e8;
  pointer-events: none;
}
.stage-title p,
.stage-title h1 {
  margin: 0;
}
.stage-title p {
  color: #9dc9ff;
  font: 700 11px/1.2 Georgia, "Times New Roman", serif;
  letter-spacing: 0.22em;
}
.stage-title h1 {
  margin-top: 8px;
  font: 600 clamp(20px, 3.2vw, 43px)/0.95 Georgia, "Times New Roman", serif;
  letter-spacing: -0.04em;
  text-shadow: 0 3px 24px rgba(0, 0, 0, 0.72);
}
.stage[data-stage-theme="halloween"] .stage-title p {
  color: #ff9d54;
}
.stage[data-stage-theme="aurora"] .stage-title p {
  color: #9af4e3;
}
.stage-switch {
  position: fixed;
  z-index: 5;
  left: clamp(24px, 5vw, 72px);
  bottom: max(40px, 7vh);
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(226, 236, 250, 0.22);
  border-radius: 999px;
  background: rgba(1, 4, 12, 0.54);
  backdrop-filter: blur(14px);
}
.stage-option {
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  color: rgba(237, 245, 255, 0.72);
  background: transparent;
  font: 700 11px/1 Georgia, "Times New Roman", serif;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}
.stage-option:hover,
.stage-option:focus-visible {
  color: #fff;
  outline: none;
  transform: translateY(-1px);
}
.stage-option[aria-pressed="true"] {
  color: #07101d;
  background: #b9d9ff;
}
.stage[data-stage-theme="halloween"] .stage-option[aria-pressed="true"] {
  color: #2a0800;
  background: #ff9a48;
}
.stage[data-stage-theme="aurora"] .stage-option[aria-pressed="true"] {
  color: #03131a;
  background: #9de9dc;
}
.caption {
  position: fixed;
  z-index: 3;
  left: 50%;
  bottom: 16%;
  transform: translateX(-50%);
  margin: 0;
  color: #ff7a18;
  font: 800 28px/1.2 -apple-system, system-ui, sans-serif;
  text-shadow: 0 2px 4px #000, 0 0 8px #000;
}
.used-minutes {
  position: fixed;
  z-index: 4;
  top: 12px;
  right: 18px;
  color: #222;
  font: 700 16px/1 -apple-system, system-ui, sans-serif;
}
@keyframes drift-stars {
  to { transform: translate3d(7%, 4%, 0); }
}
@media (max-width: 480px) {
  .stage-title {
    top: calc(14px + env(safe-area-inset-top));
    left: 16px;
    max-width: calc(100vw - 32px);
  }
  .stage-title h1 {
    margin-top: 6px;
    font-size: 26px;
  }
  .stage-switch {
    top: calc(78px + env(safe-area-inset-top));
    bottom: auto;
    left: 16px;
  }
  .stage-option {
    min-height: 36px;
    padding: 0 12px;
    font-size: 10px;
  }
}