/* Alice in Wonderland — WebGL scroll world (mobile-first, WCAG 2.1 AA) */

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

html {
  scroll-behavior: smooth;
}

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

:root {
  --sw-bg: #0a0612;
  --sw-ink: #f8f0ff;
  --sw-ink-soft: #c4b8d8;
  --sw-accent: #e056fd;
  --sw-accent-2: #7bed9f;
  --sw-scrim: rgba(10, 6, 18, 0.72);
  --sw-font-display: "Playfair Display", Georgia, serif;
  --sw-font-body: system-ui, -apple-system, "Segoe UI", sans-serif;
  --sw-nav-size: 2.75rem;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--sw-bg);
  color: var(--sw-ink);
  font-family: var(--sw-font-body);
  line-height: 1.55;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--sw-ink);
  color: var(--sw-bg);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0.5rem;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--sw-accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#canvas-host {
  position: fixed;
  inset: 0;
  z-index: 0;
  touch-action: pan-y;
}

#canvas-host canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.scroll-track {
  position: relative;
  z-index: 1;
  pointer-events: none;
}

.scroll-section {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: flex-end;
  padding: 1.25rem;
  padding-bottom: max(1.25rem, env(safe-area-inset-bottom));
}

.copy-panel {
  pointer-events: auto;
  max-width: 28rem;
  padding: 1.25rem 1.35rem;
  background: var(--sw-scrim);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.copy-panel__eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sw-accent);
}

.copy-panel__title {
  margin: 0 0 0.5rem;
  font-family: var(--sw-font-display);
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--sw-ink);
}

.copy-panel__body {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: var(--sw-ink-soft);
}

.copy-panel__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.copy-panel__tags li {
  padding: 0.25rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--sw-ink-soft);
}

.hud {
  position: fixed;
  z-index: 2;
  inset: 0;
  pointer-events: none;
}

.hud__brand {
  position: absolute;
  top: max(1rem, env(safe-area-inset-top));
  left: 1rem;
  pointer-events: auto;
  font-family: var(--sw-font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--sw-ink);
  text-decoration: none;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
}

.hud__brand:focus-visible {
  outline: 3px solid var(--sw-accent);
  outline-offset: 3px;
  border-radius: 0.25rem;
}

.hud__hint {
  position: absolute;
  bottom: max(1rem, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  padding: 0.45rem 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sw-ink-soft);
  background: rgba(0, 0, 0, 0.35);
  border-radius: 999px;
  animation: hint-pulse 2.4s ease-in-out infinite;
}

@keyframes hint-pulse {
  0%,
  100% {
    opacity: 0.65;
  }
  50% {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hud__hint {
    animation: none;
  }
}

.hud__nav {
  position: absolute;
  top: 50%;
  right: max(0.5rem, env(safe-area-inset-right));
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  pointer-events: auto;
}

.hud__nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: var(--sw-nav-size);
  min-height: var(--sw-nav-size);
  padding: 0 0.5rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--sw-ink-soft);
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.hud__nav a:hover,
.hud__nav a:focus-visible {
  color: var(--sw-ink);
  background: rgba(224, 86, 253, 0.25);
  border-color: var(--sw-accent);
  outline: none;
}

.hud__nav a[aria-current="true"] {
  color: var(--sw-bg);
  background: var(--sw-accent);
  border-color: var(--sw-accent);
}

.hud__cta {
  position: absolute;
  bottom: max(1rem, env(safe-area-inset-bottom));
  right: 1rem;
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: var(--sw-nav-size);
  padding: 0.65rem 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--sw-bg);
  background: var(--sw-accent-2);
  border-radius: 999px;
  text-decoration: none;
}

.hud__cta:focus-visible {
  outline: 3px solid var(--sw-ink);
  outline-offset: 3px;
}

.reduced-panel {
  position: relative;
  z-index: 1;
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.reduced-panel h2 {
  font-family: var(--sw-font-display);
  font-size: 1.5rem;
}

.reduced-panel ol {
  padding-left: 1.25rem;
}

.reduced-panel li {
  margin-bottom: 1rem;
}

.reduced-panel a {
  color: var(--sw-accent-2);
}

.reduced-panel[hidden],
#canvas-host[hidden],
.scroll-track[hidden],
.hud[hidden] {
  display: none !important;
}

@media (max-width: 640px) {
  .copy-panel {
    max-width: none;
  }

  .hud__nav {
    top: auto;
    bottom: max(4.5rem, calc(env(safe-area-inset-bottom) + 3rem));
    right: 0.75rem;
    transform: none;
    flex-direction: row;
    flex-wrap: wrap;
    max-width: calc(100% - 1.5rem);
    justify-content: flex-end;
  }

  .hud__nav a {
    min-width: 2.4rem;
    min-height: 2.4rem;
    font-size: 0.58rem;
  }

  .hud__hint {
    display: none;
  }
}