/* Apex Scale — Explainer (self-contained animated briefing) */
:root {
  --bg-base: #06080C;
  --gold-primary: #D4AF37;
  --gold-bright: #F5D061;
  --gold-gradient: linear-gradient(135deg, #FFF2A3 0%, #F5D061 40%, #D4AF37 80%, #996515 100%);
  --accent-emerald: #10B981;
  --accent-cyan: #06B6D4;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --font-main: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
}

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

html { color-scheme: dark; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-main);
  height: 100vh;
  overflow: hidden;
  position: relative;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---------- Top bar ---------- */
.ex-top {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 32px;
}
.ex-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  text-decoration: none;
}
.ex-logo span { color: var(--gold-bright); }
.ex-eyebrow {
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* ---------- Progress bar ---------- */
.ex-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(255,255,255,0.06);
  z-index: 21;
}
.ex-progress-bar {
  height: 100%;
  width: 0;
  background: var(--gold-gradient);
  box-shadow: 0 0 14px rgba(212,175,55,0.6);
}

/* ---------- Stage ---------- */
.ex-stage {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ex-scene {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 24px;
  opacity: 0;
  transform: translateY(30px);
  pointer-events: none;
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.ex-scene.active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.ex-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent-emerald);
  margin-bottom: 26px;
}

.ex-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.02em;
  max-width: 13ch;
  margin: 0 auto 26px;
}
.ex-title .gold {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.ex-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 44ch;
  margin: 0 auto;
}

.ex-swarm-hint {
  margin-top: 18px;
  font-size: 0.6rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(212,175,55,0.7);
}

/* ---------- CTA buttons ---------- */
.ex-cta { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; margin-top: 34px; }
.btn-gold, .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 1rem;
  padding: 15px 28px;
  border-radius: 9999px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s;
}
.btn-gold {
  background: var(--gold-gradient);
  color: #06080C;
  box-shadow: 0 8px 30px -8px rgba(212,175,55,0.55);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -10px rgba(212,175,55,0.7); }
.btn-ghost {
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.16);
}
.btn-ghost:hover { border-color: var(--gold-primary); }

/* ---------- Dots ---------- */
.ex-dots {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  gap: 10px;
}
.ex-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
  transition: all 0.3s;
}
.ex-dot.active {
  width: 26px;
  border-radius: 9999px;
  background: var(--gold-bright);
  box-shadow: 0 0 12px rgba(212,175,55,0.6);
}

/* ---------- Controls ---------- */
.ex-controls {
  position: fixed;
  bottom: 30px;
  right: 32px;
  z-index: 20;
  display: flex;
  gap: 8px;
}
.ex-controls button {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.25s;
}
.ex-controls button:hover { border-color: var(--gold-primary); color: var(--gold-bright); }

@media (max-width: 640px) {
  .ex-top { padding: 18px 20px; }
  .ex-eyebrow { display: none; }
  .ex-controls { bottom: 26px; right: 18px; }
  .ex-dots { bottom: 34px; }
}