/* ═══════════════════════════════════════════════════════════════════
   scene-effects.css — J.art Photographe V7
   Effets d'ambiance : particules, oiseaux, brume, cascade, lumieres.
   100% CSS, aucun framework requis. Place le calque #jart-scene-layer
   en arriere-plan via z-index 0 (pointer-events:none).
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --jart-gold:       #d4af37;
  --jart-gold-soft:  #e8c46c;
  --jart-intensity:  1;
}

.jart-scene-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
  opacity: var(--jart-intensity, 1);
  transition: opacity .8s ease, filter .8s ease;
}

/* Teinte par scene -------------------------------------------------- */
.jart-scene--reunion_magic { filter: hue-rotate(0deg)   saturate(1.05); }
.jart-scene--sunset        { filter: hue-rotate(-12deg) saturate(1.15) brightness(1.05); }
.jart-scene--studio        { filter: brightness(.95) saturate(.92); }
.jart-scene--forest        { filter: hue-rotate(40deg) saturate(.9); }
.jart-scene--night         { filter: brightness(.6) saturate(.6); }

/* Particules dorees -------------------------------------------------- */
.jart-particle {
  position: absolute;
  bottom: -10px;
  left: var(--x, 50vw);
  width:  var(--size, 3px);
  height: var(--size, 3px);
  background: radial-gradient(circle,
                              var(--jart-gold-soft),
                              var(--jart-gold) 60%,
                              transparent 70%);
  border-radius: 50%;
  opacity: 0;
  animation: jartFloat var(--d, 12s) linear var(--delay, 0s) infinite;
  filter: blur(.3px);
}

@keyframes jartFloat {
  0%   { transform: translateY(0)     translateX(0);    opacity: 0; }
  10%  { opacity: .85; }
  60%  { transform: translateY(-60vh) translateX(20px);  opacity: .7; }
  100% { transform: translateY(-110vh) translateX(-10px); opacity: 0; }
}

/* Mouettes SVG : DÉSACTIVÉES (charte premium sobre — pas de décoration animale) ----- */
.jart-bird { display: none !important; }
.jart-bird--legacy-disabled {
  position: absolute;
  top: var(--y, 20vh);
  left: -80px;
  width:  56px;
  height: 18px;
  color: rgba(255, 255, 255, .82);
  animation: jartFly var(--d, 20s) linear var(--delay, 0s) infinite;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.35));
}
.jart-bird svg { width: 100%; height: 100%; overflow: visible; }
.jart-bird-wing--up,
.jart-bird-wing--down {
  animation: jartBirdFlap .58s ease-in-out infinite;
}
.jart-bird-wing--down { animation-delay: -.29s; }
@keyframes jartBirdFlap {
  0%, 100% { opacity: 1; }
  48%      { opacity: 0; }
  52%      { opacity: 0; }
}

@keyframes jartFly {
  0%   { transform: translate(0,     0)   scale(var(--scale, 1)); }
  50%  { transform: translate(55vw, -3vh) scale(var(--scale, 1)); }
  100% { transform: translate(110vw, -8vh) scale(var(--scale, 1)); }
}

/* Brume -------------------------------------------------------------- */
.jart-mist {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 70%, rgba(255,255,255,.18), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(255,255,255,.12), transparent 55%);
  filter: blur(40px);
  opacity: 0;
  animation: jartMistDrift 30s ease-in-out infinite;
}
.jart-mist--1 { animation-direction: reverse; animation-duration: 38s; }

@keyframes jartMistDrift {
  0%, 100% { transform: translateX(0)     translateY(0);  opacity: .35; }
  50%      { transform: translateX(-10vw) translateY(2vh); opacity: .55; }
}

/* Cascade stylisee --------------------------------------------------- */
.jart-waterfall {
  position: absolute;
  right: 4vw;
  bottom: 0;
  width:  80px;
  height: 50vh;
  display: flex;
  gap: 4px;
  opacity: .4;
}
.jart-waterfall__col {
  flex: 1;
  background: linear-gradient(to bottom,
              transparent 0%,
              rgba(255,255,255,.20) 40%,
              rgba(212,175,55,.15)  80%,
              transparent 100%);
  background-size: 100% 200%;
  animation: jartFall 1.6s linear var(--delay, 0s) infinite;
  filter: blur(1px);
}

@keyframes jartFall {
  0%   { background-position: 0 0; }
  100% { background-position: 0 200%; }
}

/* Lumieres magiques -------------------------------------------------- */
.jart-light {
  position: absolute;
  left: var(--x, 50vw);
  top:  var(--y, 30vh);
  width:  220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle,
                              rgba(232,196,108,.35),
                              rgba(212,175,55,.15) 50%,
                              transparent 70%);
  filter: blur(20px);
  animation: jartGlow var(--d, 8s) ease-in-out var(--delay, 0s) infinite;
  mix-blend-mode: screen;
}

@keyframes jartGlow {
  0%, 100% { opacity: .35; transform: scale(1);    }
  50%      { opacity: .75; transform: scale(1.15); }
}

/* Accessibilite ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .jart-particle,
  .jart-bird,
  .jart-mist,
  .jart-waterfall__col,
  .jart-light {
    animation: none !important;
  }
  .jart-scene-layer { opacity: .4; }
}