:root {
  color-scheme: dark;
  --ink: #f3e6d0;
  --muted: rgba(243, 230, 208, 0.62);
  --quiet: rgba(232, 214, 190, 0.42);
  --line: rgba(236, 206, 164, 0.34);
  --bg: #070605;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  overflow: hidden;
  font-family: "Palatino Linotype", Palatino, "Songti SC", "Noto Serif SC", "Microsoft YaHei", serif;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

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

.vignette, .grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.vignette {
  background:
    radial-gradient(ellipse at 50% 46%, transparent 0%, transparent 36%, rgba(0, 0, 0, 0.28) 68%, rgba(0, 0, 0, 0.72) 100%);
  z-index: 1;
}

.grain {
  z-index: 1;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.topbar, .bottom {
  position: fixed;
  z-index: 2;
  left: 0;
  right: 0;
  pointer-events: none;
  opacity: 1;
  transition: opacity 1.15s ease;
}

html[data-chrome="quiet"] .chrome {
  opacity: 0;
}

html[data-chrome="quiet"] .chrome,
html[data-chrome="quiet"] .chrome * {
  pointer-events: none;
}

.topbar {
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: calc(12px + env(safe-area-inset-top)) calc(14px + env(safe-area-inset-right)) 0 calc(14px + env(safe-area-inset-left));
}

.bottom {
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 16px calc(16px + env(safe-area-inset-bottom));
  text-align: center;
}

.credit {
  margin: 0;
  max-width: min(280px, 62vw);
  font-size: 10px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--quiet);
}

.tools {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
  pointer-events: auto;
  margin-left: auto;
}

button {
  font: inherit;
  color: var(--ink);
  background: rgba(22, 14, 10, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: pointer;
  touch-action: manipulation;
  pointer-events: auto;
}

button:focus { outline: none; }

button:focus-visible {
  outline: 2px solid #e7c59a;
  outline-offset: 3px;
}

button:disabled {
  cursor: default;
  opacity: 0.55;
}

.tools button {
  min-height: 36px;
  padding: 0 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

#status {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  color: var(--muted);
}

#hint, #note {
  margin: 0;
  min-height: 1.2em;
  font-size: 12px;
  color: var(--quiet);
}

#action {
  min-width: 148px;
  min-height: 48px;
  padding: 0 28px;
  font-size: 17px;
  letter-spacing: 0.18em;
  text-indent: 0.18em;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

#action:active:not(:disabled) { transform: translateY(1px); }

#action[data-state="burning"] {
  border-color: rgba(255, 176, 96, 0.5);
  box-shadow: 0 0 24px rgba(255, 140, 60, 0.12), 0 10px 28px rgba(0, 0, 0, 0.35);
}

#fallback {
  position: fixed;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 24px;
  text-align: center;
  background: var(--bg);
}

#fallback[hidden] { display: none; }

@media (max-width: 520px) {
  .topbar {
    flex-direction: column;
    align-items: flex-end;
  }
  .credit {
    max-width: 100%;
    text-align: right;
  }
  #action { min-width: 132px; }
}

@media (prefers-reduced-motion: reduce) {
  #action:active:not(:disabled) { transform: none; }
  .topbar, .bottom { transition-duration: 0.01s; }
}