/* ============================================================
   FROLLEIN S — animated cinematic scenes (hero + maison)
   Pure-CSS atmosphere: runway spotlight, drifting silk light,
   floating motes, slow light sweep. No JS rAF required.
   ============================================================ */

.scene {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

/* deep warm base */
.scene-base {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 50% 120%, oklch(0.14 0.006 60) 0%, transparent 60%),
    linear-gradient(180deg, oklch(0.19 0.006 65) 0%, oklch(0.13 0.005 60) 100%);
}

/* runway spotlight from above — breathes + drifts */
.spotlight {
  position: absolute;
  left: 50%; top: -30%;
  width: 90%; height: 120%;
  transform: translateX(-50%);
  background: radial-gradient(50% 50% at 50% 0%, oklch(0.86 0.05 80 / 0.30), oklch(0.7 0.04 70 / 0.08) 45%, transparent 70%);
  filter: blur(8px);
  animation: spotlightBreathe 16s var(--ease, ease-in-out) infinite;
  will-change: opacity, transform;
}
.spotlight--soft { opacity: 0.6; animation-duration: 22s; }

/* silk-light forms — soft glowing drapes that slowly move */
.silk {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  mix-blend-mode: screen;
  will-change: transform;
  pointer-events: none;
}
.silk-1 {
  width: 52vw; height: 38vw; left: -6vw; top: 4%;
  background: radial-gradient(circle, oklch(0.78 0.07 78 / 0.42), transparent 64%);
  animation: silkDrift1 26s ease-in-out infinite;
}
.silk-2 {
  width: 50vw; height: 46vw; right: -10vw; top: -4%;
  background: radial-gradient(circle, oklch(0.6 0.08 58 / 0.4), transparent 63%);
  animation: silkDrift2 34s ease-in-out infinite;
}
.silk-3 {
  width: 40vw; height: 26vw; left: 28vw; top: 20%;
  background: radial-gradient(circle, oklch(0.72 0.06 70 / 0.3), transparent 66%);
  animation: silkDrift3 30s ease-in-out infinite;
}

/* slow diagonal light sweep — a sheen crossing the frame */
.sheen {
  position: absolute;
  top: -20%; left: 0;
  width: 28%; height: 140%;
  background: linear-gradient(100deg, transparent, oklch(0.9 0.03 82 / 0.14) 45%, oklch(0.95 0.02 85 / 0.22) 50%, transparent);
  transform: skewX(-10deg) translateX(-80%);
  filter: blur(10px);
  mix-blend-mode: screen;
  animation: sheenSweep 13s ease-in-out infinite;
  animation-delay: 3s;
}

/* floating motes (dust in the light) */
.motes { position: absolute; inset: 0; pointer-events: none; }
.mote {
  position: absolute;
  bottom: -10px;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: oklch(0.92 0.03 82);
  box-shadow: 0 0 6px 1px oklch(0.9 0.04 82 / 0.7);
  opacity: 0;
  animation-name: moteFloat;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
  will-change: transform, opacity;
}

/* soft vignette so type stays legible */
.scene-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, oklch(0.1 0.005 60 / 0.5) 0%, transparent 26%, transparent 42%, oklch(0.09 0.005 60 / 0.82) 100%);
}

/* maison variant: dimmer + cooler-warm, no harsh top vignette */
.scene--maison .scene-base { background: linear-gradient(180deg, oklch(0.16 0.005 62), oklch(0.12 0.005 60)); }
.scene--maison .silk { opacity: 0.7; }
.scene--maison .scene-veil {
  background: radial-gradient(75% 90% at 50% 50%, transparent, oklch(0.12 0.005 60 / 0.55) 78%);
}

@keyframes spotlightBreathe {
  0%, 100% { opacity: 0.55; transform: translateX(-52%) scale(1); }
  50%      { opacity: 0.9;  transform: translateX(-46%) scale(1.08); }
}
@keyframes silkDrift1 {
  0%   { transform: translate(-6%, 6%) rotate(0deg) scale(1); }
  50%  { transform: translate(9%, -7%) rotate(14deg) scale(1.16); }
  100% { transform: translate(-6%, 6%) rotate(0deg) scale(1); }
}
@keyframes silkDrift2 {
  0%   { transform: translate(6%, -4%) rotate(0deg) scale(1.05); }
  50%  { transform: translate(-8%, 8%) rotate(-16deg) scale(1.2); }
  100% { transform: translate(6%, -4%) rotate(0deg) scale(1.05); }
}
@keyframes silkDrift3 {
  0%   { transform: translate(0, 4%) rotate(0deg) scale(1); }
  50%  { transform: translate(-7%, -6%) rotate(12deg) scale(1.12); }
  100% { transform: translate(0, 4%) rotate(0deg) scale(1); }
}
@keyframes sheenSweep {
  0%   { transform: skewX(-10deg) translateX(-80%); opacity: 0; }
  35%  { opacity: 0.9; }
  65%  { opacity: 0.9; }
  100% { transform: skewX(-10deg) translateX(420%); opacity: 0; }
}
@keyframes moteFloat {
  0%   { transform: translateY(0) translateX(0) scale(1); opacity: 0; }
  12%  { opacity: 0.85; }
  85%  { opacity: 0.5; }
  100% { transform: translateY(-78vh) translateX(24px) scale(0.6); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .spotlight, .silk, .sheen, .mote { animation: none !important; }
  .mote { opacity: 0.4; }
}