/* ============================================================
   EXARYN DEMO PLAYER — shared chrome for simulated walkthroughs.
   Page chrome uses the Exaryn paper system; each demo's stage
   brings its own product skin.
   ============================================================ */

:root {
  --paper: #f4f1ea;
  --ink: #171512;
  --muted: #57524b;
  --line: #d8d2c6;
  --accent: #ff4d00;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Inter", -apple-system, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --pad: clamp(16px, 3vw, 40px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.mono {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

a { color: inherit; text-decoration: none; }

/* Hidden until focused, matching assets/style.css. */
.skip-link {
  position: absolute;
  left: var(--pad);
  top: 8px;
  z-index: 100;
  padding: 8px 14px;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-180%);
  transition: transform 0.15s ease;
}
.skip-link:focus { transform: none; }

/* ---------- header ---------- */

.demo-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px var(--pad);
  border-bottom: 1px solid var(--line);
}

.demo-header .wordmark { font-family: var(--serif); font-size: 24px; }
.demo-header .wordmark .mark { color: var(--accent); }

.demo-nav { display: flex; gap: 22px; margin-left: auto; }

.demo-nav a { position: relative; padding: 4px 0; }

.demo-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right 0.25s ease;
}

.demo-nav a:hover::after { right: 0; }

/* ---------- title strip ---------- */

.demo-title {
  display: flex;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
  padding: 20px var(--pad) 14px;
}

.demo-title h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 46px);
  letter-spacing: -0.01em;
}

.demo-title h1 em { color: var(--accent); font-style: italic; }

.sim-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 4px 8px;
}

/* ---------- stage ---------- */

.demo-wrap { padding: 0 var(--pad) 40px; max-width: 1180px; margin: 0 auto; }

.demo-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 2px solid var(--ink);
  overflow: hidden;
  box-shadow: 8px 8px 0 rgba(23, 21, 18, 0.12);
  user-select: none;
}

.demo-stage.portrait { aspect-ratio: auto; height: min(78vh, 720px); }

/* every animated element: hidden by default, .on = visible */
.demo-stage .fx {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.demo-stage .fx.on { opacity: 1; transform: none; }

.demo-stage.no-anim *, .demo-stage.no-anim *::before, .demo-stage.no-anim *::after {
  transition: none !important;
  animation-duration: 0.001s !important;
}

.demo-stage.paused::after {
  content: "❚❚";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 44px;
  color: #fff;
  background: rgba(0, 0, 0, 0.35);
  z-index: 40;
  letter-spacing: 8px;
}

/* ---------- subtitles ---------- */

.subtitle-layer {
  position: absolute;
  left: 0; right: 0; bottom: 14px;
  display: flex;
  justify-content: center;
  z-index: 30;
  pointer-events: none;
  padding: 0 16px;
}

#subtitle {
  max-width: 82%;
  background: rgba(10, 9, 8, 0.82);
  color: #fdfcf9;
  font-size: clamp(13px, 1.6vw, 16.5px);
  line-height: 1.45;
  padding: 8px 16px;
  border-radius: 4px;
  text-align: center;
  text-wrap: balance;
}

#subtitle:empty { display: none; }

#subtitle b { color: #ffb38a; font-weight: 600; }

/* ---------- controls ---------- */

.demo-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 14px 2px;
}

.ctl-btn {
  all: unset;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  padding: 9px 16px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.ctl-btn:hover { background: var(--accent); border-color: var(--accent); }

.ctl-btn.secondary { background: transparent; color: var(--ink); }
.ctl-btn.secondary:hover { background: var(--ink); color: var(--paper); }

#demo-time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

#progress-bar {
  flex: 1;
  min-width: 120px;
  height: 8px;
  border: 1px solid var(--ink);
  cursor: pointer;
  background: var(--paper);
}

#progress-fill { height: 100%; width: 0%; background: var(--accent); }

/* ---------- chapters ---------- */

#chapters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-bottom: 8px;
}

.chapter {
  all: unset;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  transition: border-color 0.15s, color 0.15s;
}

.chapter:hover { border-color: var(--ink); color: var(--ink); }

.chapter.active { border-color: var(--accent); color: var(--ink); }

.chapter .ch-num {
  display: inline-grid;
  place-items: center;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--line);
  font-size: 9px;
  color: var(--ink);
}

.chapter.active .ch-num { background: var(--accent); color: #fff; }

/* ---------- footer note ---------- */

.demo-note {
  padding: 6px 2px 20px;
  color: var(--muted);
  font-size: 13px;
  max-width: 70ch;
}

.demo-note a { color: var(--accent); }
.demo-note a:hover { text-decoration: underline; }

@media (max-width: 700px) {
  .demo-stage { aspect-ratio: auto; height: 62vh; }
  #subtitle { max-width: 94%; font-size: 12.5px; }
}