:root {
  color-scheme: dark;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  color: #f5eddd;
  background: #090707;

  /* Palette */
  --ink-950: #090707;
  --ink-900: #100b0b;
  --ink-800: #1a1111;
  --brown-800: #281813;
  --burgundy-700: #55202b;
  --burgundy-600: #743043;
  --darkroom-red: #9e2635;
  --amber-500: #c9914f;
  --amber-300: #e0b873;
  --copper-500: #9a7350;
  --paper-100: #f5eddd;
  --paper-200: #e7d9c0;
  --paper-300: #cdbb9f;
  --muted: #bfb1a2;
  --line: rgba(226, 199, 158, 0.22);
  --line-strong: rgba(224, 184, 115, 0.54);
  --panel: rgba(19, 12, 12, 0.94);
  --success: #b8c69b;
  --error: #d67572;

  /* Typography */
  --font-display: "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --text-xs: 0.6875rem;
  --text-sm: 0.8125rem;
  --text-base: 0.9375rem;
  --text-lg: 1.125rem;
  --text-xl: clamp(1.55rem, 6vw, 2rem);
  --text-hero: clamp(2.2rem, 9vw, 3.2rem);
  --leading-copy: 1.75;

  /* Space and shape */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  /* Effects and motion */
  --shadow-soft: 0 14px 34px rgba(0, 0, 0, 0.34);
  --shadow-deep: 0 28px 80px rgba(0, 0, 0, 0.58);
  --shadow-paper: 0 20px 44px rgba(0, 0, 0, 0.45), 0 2px 2px rgba(255, 255, 255, 0.14) inset;
  --duration-fast: 160ms;
  --duration-normal: 420ms;
  --duration-ritual: 1100ms;
  --ease-out: cubic-bezier(0.22, 0.75, 0.24, 1);
  --ease-ritual: cubic-bezier(0.2, 0.68, 0.18, 1);

  /* Layout and layer */
  --safe-top: max(1rem, env(safe-area-inset-top));
  --safe-right: max(1rem, env(safe-area-inset-right));
  --safe-bottom: max(1rem, env(safe-area-inset-bottom));
  --safe-left: max(1rem, env(safe-area-inset-left));
  --z-scene: 1;
  --z-content: 5;
  --z-dialogue: 20;
  --z-overlay: 60;
  --z-debug: 90;
  --z-toast: 100;

  /* Backward-compatible aliases used by stage-one modules */
  --ink: var(--ink-800);
  --film: #171313;
  --wine: var(--burgundy-700);
  --wine-light: var(--burgundy-600);
  --amber: var(--amber-500);
  --cream: var(--paper-100);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  color: var(--paper-100);
  background:
    radial-gradient(ellipse at 50% 45%, rgba(116, 48, 42, 0.3) 0, transparent 42%),
    radial-gradient(ellipse at 20% 20%, rgba(169, 118, 62, 0.1) 0, transparent 36%),
    linear-gradient(145deg, #080606, #211313 54%, #0b0808);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  opacity: 0.18;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.2'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

button,
input,
select {
  font: inherit;
}

button {
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--amber-300);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.primary-button,
.secondary-button,
.text-button {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  cursor: pointer;
}

.primary-button,
.secondary-button {
  position: relative;
  border-radius: var(--radius-pill);
  padding: 0.78rem 1.45rem;
  letter-spacing: 0.08em;
  transition:
    transform var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) ease,
    background var(--duration-fast) ease,
    color var(--duration-fast) ease,
    opacity var(--duration-fast) ease;
}

.primary-button {
  border: 1px solid #d7ae70;
  color: #27160f;
  background: linear-gradient(135deg, #e7c686, #bd8244);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.32), 0 1px rgba(255, 249, 227, 0.5) inset;
}

.secondary-button {
  border: 1px solid var(--line);
  color: var(--paper-200);
  background: rgba(224, 184, 115, 0.055);
}

@media (hover: hover) {
  .primary-button:hover,
  .secondary-button:hover {
    transform: translateY(-2px);
  }

  .primary-button:hover {
    background: linear-gradient(135deg, #efd39a, #c88c4d);
  }

  .secondary-button:hover {
    border-color: var(--line-strong);
    background: rgba(224, 184, 115, 0.1);
  }
}

.primary-button:active,
.secondary-button:active {
  transform: translateY(1px) scale(0.985);
}

button:disabled,
button[aria-disabled="true"],
.is-locked {
  cursor: not-allowed;
  opacity: 0.46;
  transform: none;
}

.text-button {
  padding: 0.6rem 0.9rem;
  color: var(--muted);
  background: transparent;
  text-decoration: none;
  letter-spacing: 0.08em;
}

.text-button::after {
  content: "";
  display: block;
  width: 1.75rem;
  height: 1px;
  margin: 0.2rem auto 0;
  background: currentColor;
  opacity: 0.45;
  transition: width var(--duration-fast) ease;
}

@media (hover: hover) {
  .text-button:hover::after { width: 100%; }
}

.eyebrow {
  margin: 0 0 0.45rem;
  color: var(--amber-300);
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.scene-header {
  position: relative;
  z-index: var(--z-content);
  width: 100%;
  padding: calc(var(--safe-top) + 4.5%) 8% 3%;
  text-align: center;
}

.scene-header::after {
  content: "";
  display: block;
  width: 2.5rem;
  height: 1px;
  margin: 0.8rem auto 0;
  background: linear-gradient(90deg, transparent, var(--copper-500), transparent);
}

.scene-header h2,
.scene-copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.12em;
}

.scene-header h2 {
  font-size: var(--text-xl);
}

.scene-header p:last-child {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.compact-header {
  padding-bottom: 1.5%;
}

.interaction-note {
  margin: 0.7rem 0 0.9rem;
  color: var(--muted);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.toast {
  position: absolute;
  left: 50%;
  bottom: var(--safe-bottom);
  z-index: var(--z-toast);
  transform: translateX(-50%);
  width: max-content;
  max-width: 82%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 0.65rem 1rem;
  color: var(--paper-100);
  background: rgba(12, 8, 8, 0.96);
  box-shadow: var(--shadow-soft);
  font-size: var(--text-sm);
  text-align: center;
}

.reset-progress-button {
  position: absolute;
  top: calc(var(--safe-top) + 0.15rem);
  right: var(--safe-right);
  z-index: 40;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid rgba(226, 199, 158, 0.2);
  border-radius: var(--radius-pill);
  padding: 0.55rem 0.75rem;
  color: rgba(245, 237, 221, 0.68);
  background: rgba(12, 8, 8, 0.62);
  backdrop-filter: blur(8px);
  cursor: pointer;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  transition:
    color var(--duration-fast) ease,
    border-color var(--duration-fast) ease,
    background var(--duration-fast) ease;
}

@media (hover: hover) {
  .reset-progress-button:hover {
    border-color: var(--line-strong);
    color: var(--paper-100);
    background: rgba(30, 19, 18, 0.88);
  }
}

.reset-progress-button:active {
  color: var(--amber-300);
  background: rgba(50, 28, 25, 0.92);
}

.is-loading { cursor: progress; }
.is-success { border-color: rgba(184, 198, 155, 0.72) !important; }
.is-error { border-color: rgba(214, 117, 114, 0.8) !important; }

@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}