:root {
  /* Valeurs de classic, réécrites au boot par le thème actif (src/themes). */
  --bg: #000;
  --ink: #d9d4ca;
  --line: rgba(255, 255, 255, 0.2);
  --line-hover: rgba(255, 255, 255, 0.5);
  --accent: #d9d4ca;
  --accent-on: rgba(216, 208, 192, 0.6);
  --accent-on-bg: rgba(216, 208, 192, 0.08);
  --vignette: 0.6;
  --font-ui: "Inter";
  --font-display: "Syne";
  --font-mono: "Space Mono";
  --font-label: "Fraunces";
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui), system-ui, sans-serif;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

#stage { position: fixed; inset: 0; }
#stage canvas { display: block; width: 100%; height: 100%; }
body.is-hover #stage { cursor: pointer; }

body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0, 0, 0, var(--vignette)) 100%);
  z-index: 2;
}

/* HUD */
.hud { position: fixed; inset: 0; pointer-events: none; transition: opacity 0.5s; z-index: 5; }
.hud.is-hidden { opacity: 0; }
.hud-brand { position: absolute; top: 28px; left: 32px; display: flex; flex-direction: column; gap: 5px; }
.hud-name { font-family: var(--font-display), sans-serif; font-weight: 700; font-size: 15px; letter-spacing: 0.02em; }
.hud-sub { font-size: 13px; font-weight: 300; opacity: 0.55; }
.hud-hint { position: absolute; bottom: 26px; left: 32px; font-size: 12px; opacity: 0.45; }
/* Commutateur de thème : pastilles texte, en haut au centre. */
.theme-switch {
  position: absolute; top: 26px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 6px; pointer-events: auto;
}
.hud.is-hidden .theme-switch { pointer-events: none; }
.theme-switch button {
  background: transparent; color: var(--ink); cursor: pointer;
  border: 1px solid transparent; border-radius: 999px;
  padding: 5px 11px; font: 400 11px var(--font-mono), monospace; letter-spacing: 0.04em;
  opacity: 0.45; transition: opacity 0.2s, border-color 0.2s;
}
.theme-switch button:hover { opacity: 0.8; }
.theme-switch button[aria-current="true"] { border-color: var(--line); opacity: 0.8; }
.hud-counter { position: absolute; bottom: 26px; right: 32px; font-family: var(--font-mono), monospace; font-size: 12px; opacity: 0.55; }

/* Loader */
.loader {
  position: fixed; inset: 0; z-index: 50; background: var(--bg);
  display: grid; place-items: center;
  transition: opacity 0.5s ease, visibility 0s linear 0.5s;
}
.loader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }


/* Hover label: floats above the pulled book */
.book-label {
  position: fixed; left: 0; top: 0; z-index: 4; pointer-events: none;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  margin-left: -140px; width: 280px; text-align: center;
  opacity: 0; transition: opacity 0.25s ease;
}
.book-label.is-visible { opacity: 1; }
.book-label > span {
  transform: translateY(calc(-100% + 4px)); filter: blur(2px); opacity: 0;
  transition: transform 0.4s cubic-bezier(.2,.7,.2,1), filter 0.4s ease, opacity 0.4s ease;
}
.book-label.is-visible > span { transform: translateY(-100%); filter: blur(0); opacity: 1; }
.book-label.is-visible > .book-label-meta { opacity: 0.55; transition-delay: 0.12s; }
.book-label-title { font-family: var(--font-label), Georgia, serif; font-style: italic; font-size: 14px; color: var(--ink); }
.book-label-meta { font-family: var(--font-mono), monospace; font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.55; }

/* Reader */
.reader-ui { position: fixed; inset: 0; z-index: 10; pointer-events: none; opacity: 0; transition: opacity 0.5s; }
.reader-ui.is-visible { opacity: 1; }
.reader-close {
  pointer-events: auto; position: absolute; top: 24px; right: 32px;
  background: transparent; color: var(--ink);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 10px 16px; font: 500 12px var(--font-ui), sans-serif; cursor: pointer;
}
.reader-fav {
  pointer-events: auto; position: absolute; top: 24px; right: 210px;
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--ink);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 10px 16px; font: 500 12px var(--font-ui), sans-serif; cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.reader-fav svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linejoin: round; transition: fill 0.25s, transform 0.35s cubic-bezier(.2,.7,.2,1.4); }
.reader-fav:hover { border-color: var(--line-hover); }
.reader-fav[aria-pressed="true"] { border-color: var(--accent-on); background: var(--accent-on-bg); }
.reader-fav[aria-pressed="true"] svg { fill: currentColor; transform: rotate(72deg) scale(1.1); }
.reader-close:hover { border-color: var(--line-hover); }
.reader-close kbd { font-family: var(--font-mono), monospace; font-size: 10px; opacity: 0.6; margin-left: 8px; }
.reader-hint {
  position: absolute; bottom: 28px; left: 0; right: 0; margin: 0; text-align: center;
  font-size: 12px; letter-spacing: 0.04em; opacity: 0; transition: opacity 0.4s;
}
.reader-ui.is-cover .reader-hint { opacity: 0.55; }
.reader-nav {
  pointer-events: auto; position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 18px;
  font-family: var(--font-mono), monospace; font-size: 12px;
  opacity: 0; transition: opacity 0.4s;
}
.reader-ui.is-open .reader-nav { opacity: 0.8; }
.reader-ui:not(.is-open) .reader-nav { pointer-events: none; }
.reader-nav button {
  background: transparent; color: var(--ink);
  border: 1px solid var(--line); border-radius: 50%;
  width: 38px; height: 38px; cursor: pointer; font-size: 14px;
}
.reader-nav button:hover:not(:disabled) { border-color: var(--line-hover); }
.reader-nav button:disabled { opacity: 0.3; cursor: default; }

.sound-toggle {
  position: fixed; top: 28px; right: 32px; z-index: 6;
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--ink); font: 400 12px var(--font-mono), monospace; opacity: 0.45;
  transition: opacity 0.3s;
}
.sound-toggle:hover { opacity: 0.8; }
body:has(.reader-ui.is-visible) .sound-toggle { top: auto; bottom: 28px; right: 32px; }

/* Material cursor: fine pointers only, the native cursor stays on interface buttons. */
#cursor {
  position: fixed; left: 0; top: 0; z-index: 60; pointer-events: none;
  width: 6px; height: 6px; margin: -3px 0 0 -3px; border-radius: 50%;
  background: var(--ink); opacity: 0;
  transition: width 0.18s ease, height 0.18s ease, margin 0.18s ease, opacity 0.3s ease;
  will-change: transform;
}
#cursor.is-live { opacity: 0.85; }
body.is-hover #cursor { width: 8px; height: 8px; margin: -4px 0 0 -4px; }
#cursor.is-down, body.is-hover #cursor.is-down { width: 4px; height: 4px; margin: -2px 0 0 -2px; transition-duration: 0.08s; }
@media (pointer: fine) {
  body.has-cursor #stage canvas, body.has-cursor.is-hover #stage { cursor: none; }
}
@media (pointer: coarse) { #cursor { display: none; } }

/* HUD asleep after a few idle seconds */
.hud.is-asleep:not(.is-hidden) { opacity: 0.8; transition: opacity 1.2s ease; }
#readerUi.is-visible.is-asleep { opacity: 0.8; transition: opacity 1.2s ease; }

/* Pressed buttons sink 1px */
.reader-nav button, .reader-close, .reader-fav, .sound-toggle {
  transition-property: border-color, background, opacity, transform, box-shadow;
  transition-duration: 0.2s;
}
.reader-nav button:active:not(:disabled), .reader-close:active, .reader-fav:active {
  transform: translateY(1px); border-width: 2px; border-color: var(--line-hover);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.45); transition-duration: 0.08s;
}
.sound-toggle:active { transform: translateY(1px); opacity: 0.8; text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5); transition-duration: 0.08s; }

/* Page counter roll */
#pageInfo { display: inline-grid; overflow: hidden; line-height: 1.4; height: 1.4em; vertical-align: middle; }
#pageInfo > .pi-old, #pageInfo > .pi-new { grid-area: 1 / 1; white-space: nowrap; text-align: center; }
#pageInfo > .pi-old { opacity: 0; }
#pageInfo.is-rolling > .pi-old { animation: pi-out 0.25s ease forwards; }
#pageInfo.is-rolling > .pi-new { animation: pi-in 0.25s ease both; }
@keyframes pi-out { from { transform: translateY(0); opacity: 1; } to { transform: translateY(-8px); opacity: 0; } }
@keyframes pi-in { from { transform: translateY(8px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  #pageInfo.is-rolling > .pi-old, #pageInfo.is-rolling > .pi-new { animation: none; }
  #pageInfo.is-rolling > .pi-old { opacity: 0; }
  .book-label > span { transition: none; filter: none; transform: translateY(-100%); }
  .reader-nav button:active:not(:disabled), .reader-close:active, .reader-fav:active, .sound-toggle:active { transform: none; }
  #cursor { transition: none; }
  .hud.is-asleep:not(.is-hidden), #readerUi.is-visible.is-asleep { transition: none; }
}