/* ================================================================
   TANTRA THEME — ANIMATIONS
   ================================================================ */

/* ── Reveal on scroll ─────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--dur-enter) var(--ease-out),
    transform var(--dur-enter) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }

/* ── Fade in ──────────────────────────────────────────────────── */
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.fade-in { animation: fade-in var(--dur-base) var(--ease-out) forwards; }

/* ── Gold shimmer on hover (accent line) ──────────────────────── */
.gold-underline {
  position: relative;
  display: inline-block;
}

.gold-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width var(--dur-base) var(--ease-out);
}

.gold-underline:hover::after { width: 100%; }

/* ── Decorative line ──────────────────────────────────────────── */
.deco-line {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--gold);
  margin-bottom: var(--space-4);
}

.deco-line::before,
.deco-line::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gold-dim));
}

.deco-line::after {
  background: linear-gradient(to left, transparent, var(--gold-dim));
}

/* ── Grain overlay ────────────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
}

/* ── Section divider ──────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--surface-2) 20%,
    var(--gold-dim) 50%,
    var(--surface-2) 80%,
    transparent
  );
  margin: var(--space-16) 0;
}