:root {
  color-scheme: dark;
  --gold: #ffd166;
  --gold-hot: #fff1a8;
  --violet: #8e65ff;
  --cyan: #75e8ff;
  --magenta: #ff5ec4;
  --ink: #03040d;
  --panel: rgba(3, 4, 13, 0.36);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
  font-family:
    ui-monospace, "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono",
    monospace;
  letter-spacing: 0;
}

button,
canvas {
  -webkit-tap-highlight-color: transparent;
}

.artifact-shell {
  position: relative;
  width: 100vw;
  height: 100svh;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 22% 18%, rgba(117, 232, 255, 0.15), transparent 30%),
    radial-gradient(circle at 78% 32%, rgba(255, 94, 196, 0.12), transparent 28%),
    radial-gradient(circle at 50% 86%, rgba(255, 209, 102, 0.08), transparent 32%),
    linear-gradient(140deg, #03040d 0%, #071027 45%, #140925 100%);
}

#cosmic-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.intro-panel,
.final-panel,
.hud {
  position: absolute;
  z-index: 3;
  color: rgba(255, 255, 255, 0.86);
  text-transform: uppercase;
  text-shadow: 0 0 18px rgba(117, 232, 255, 0.24);
}

.intro-panel,
.final-panel {
  left: 50%;
  top: 50%;
  width: min(88vw, 700px);
  transform: translate(-50%, -50%);
  display: grid;
  justify-items: center;
  gap: 18px;
  text-align: center;
  transition:
    opacity 420ms ease,
    transform 420ms ease,
    visibility 420ms ease;
}

.intro-panel.is-hidden,
.final-panel {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, -48%);
}

.final-panel.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}

.final-panel {
  top: auto;
  bottom: max(26px, env(safe-area-inset-bottom));
  gap: 12px;
  transform: translate(-50%, 12px);
}

.final-panel.is-visible {
  transform: translate(-50%, 0);
}

.signal,
.origin {
  margin: 0;
  color: rgba(117, 232, 255, 0.74);
  font-size: clamp(0.72rem, 2.1vw, 0.92rem);
  line-height: 1.5;
  text-shadow:
    0 1px 12px rgba(3, 4, 13, 0.96),
    0 0 12px rgba(117, 232, 255, 0.26);
}

.origin {
  color: rgba(255, 209, 102, 0.74);
}

h1,
h2 {
  max-width: 13ch;
  margin: 0;
  color: #fff6c9;
  font-size: clamp(2.2rem, 8vw, 5.8rem);
  font-weight: 500;
  line-height: 0.94;
  letter-spacing: 0;
  text-wrap: balance;
  text-shadow:
    0 2px 18px rgba(3, 4, 13, 0.92),
    0 0 16px rgba(255, 209, 102, 0.38),
    0 0 50px rgba(142, 101, 255, 0.3);
}

h2 {
  max-width: 100%;
  font-size: clamp(3.4rem, 16vw, 9rem);
  color: #fff8d9;
}

.primary-button {
  min-height: 46px;
  border: 1px solid rgba(255, 209, 102, 0.72);
  border-radius: 999px;
  padding: 0 22px;
  background:
    linear-gradient(90deg, rgba(255, 209, 102, 0.16), rgba(117, 232, 255, 0.1)),
    rgba(3, 4, 13, 0.42);
  color: #fff6c9;
  box-shadow:
    0 0 18px rgba(255, 209, 102, 0.18),
    inset 0 0 18px rgba(255, 255, 255, 0.05);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  text-transform: uppercase;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.primary-button:hover,
.primary-button:focus-visible {
  border-color: var(--gold-hot);
  box-shadow:
    0 0 28px rgba(255, 209, 102, 0.3),
    inset 0 0 18px rgba(255, 255, 255, 0.08);
  outline: none;
  transform: translateY(-1px);
}

.audio-button {
  position: absolute;
  z-index: 4;
  top: max(18px, env(safe-area-inset-top));
  right: max(18px, env(safe-area-inset-right));
  min-height: 34px;
  border: 1px solid rgba(117, 232, 255, 0.46);
  border-radius: 999px;
  padding: 0 13px;
  background:
    linear-gradient(90deg, rgba(117, 232, 255, 0.12), rgba(255, 209, 102, 0.08)),
    rgba(3, 4, 13, 0.38);
  color: rgba(255, 246, 201, 0.88);
  box-shadow:
    0 0 18px rgba(117, 232, 255, 0.14),
    inset 0 0 14px rgba(255, 255, 255, 0.04);
  cursor: pointer;
  font: inherit;
  font-size: 0.68rem;
  text-transform: uppercase;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    opacity 180ms ease;
}

.audio-button[aria-pressed="false"] {
  color: rgba(255, 255, 255, 0.54);
  border-color: rgba(255, 255, 255, 0.24);
  opacity: 0.82;
}

.audio-button:hover,
.audio-button:focus-visible {
  border-color: rgba(255, 241, 168, 0.78);
  outline: none;
}

.hud {
  left: max(18px, env(safe-area-inset-left));
  top: max(18px, env(safe-area-inset-top));
  width: min(270px, calc(100vw - 36px));
  display: grid;
  gap: 8px;
  padding: 14px 0 0;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity 360ms ease,
    transform 360ms ease;
  pointer-events: none;
}

.hud.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.hud > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.hud-label,
.hud-value,
#statusReadout {
  font-size: 0.72rem;
  line-height: 1.35;
}

.hud-label {
  color: rgba(255, 255, 255, 0.68);
}

.hud-value {
  color: var(--gold-hot);
}

.charge-track {
  width: 100%;
  height: 3px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.13);
}

.charge-track span {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--cyan), var(--magenta));
  box-shadow: 0 0 16px rgba(255, 209, 102, 0.6);
  transition: width 180ms ease;
}

#statusReadout {
  min-height: 1.35em;
  margin: 0;
  color: rgba(117, 232, 255, 0.72);
}

@media (max-width: 680px) {
  .intro-panel,
  .final-panel {
    gap: 16px;
  }

  .hud {
    width: min(230px, calc(100vw - 30px));
  }

  .primary-button {
    max-width: 100%;
    white-space: normal;
  }
}

.zelda-shell #zelda-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.zelda-hud {
  position: absolute;
  z-index: 3;
  left: max(18px, env(safe-area-inset-left));
  top: max(18px, env(safe-area-inset-top));
  width: min(320px, calc(100vw - 36px));
  display: grid;
  gap: 9px;
  color: rgba(255, 255, 255, 0.82);
  text-transform: uppercase;
  text-shadow: 0 0 18px rgba(117, 232, 255, 0.24);
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity 360ms ease,
    transform 360ms ease;
  pointer-events: none;
}

.zelda-hud.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.zelda-hud-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.72rem;
  line-height: 1.35;
}

.zelda-hud-row span:last-child {
  color: var(--gold-hot);
}

.zelda-map {
  width: 78px;
  display: grid;
  grid-template-columns: repeat(3, 18px);
  gap: 4px;
}

.zelda-map span {
  width: 18px;
  height: 12px;
  border: 1px solid rgba(117, 232, 255, 0.24);
  background: rgba(3, 4, 13, 0.34);
}

.zelda-map span.is-visited {
  border-color: rgba(255, 209, 102, 0.42);
  background: rgba(255, 209, 102, 0.12);
}

.zelda-map span.is-current {
  border-color: rgba(255, 241, 168, 0.92);
  background: rgba(255, 241, 168, 0.28);
  box-shadow: 0 0 12px rgba(255, 209, 102, 0.45);
}

#zeldaStatus {
  margin: 0;
  color: rgba(117, 232, 255, 0.78);
  font-size: 0.72rem;
  line-height: 1.35;
}