/* Habillage des visuels publicitaires. Partagé par le site et par l'aperçu
   du studio publicitaire, pour que l'aperçu montre exactement le rendu réel. */

.promo-slide {
  position: relative;
  overflow: hidden;
}

.promo-overlay {
  position: absolute;
  left: 0;
  right: 0;
  display: grid;
  gap: 8px;
  padding: 20px;
  text-align: center;
  justify-items: center;
}

.promo-overlay-top { top: 0; background: linear-gradient(to bottom, rgba(2, 6, 23, 0.82), transparent); }
.promo-overlay-bottom { bottom: 0; background: linear-gradient(to top, rgba(2, 6, 23, 0.86), transparent); }
.promo-overlay-center {
  top: 50%;
  transform: translateY(-50%);
  background: rgba(2, 6, 23, 0.55);
}

.promo-overlay-light { color: #f8fafc; }
.promo-overlay-dark { color: #0b1220; }
.promo-overlay-dark.promo-overlay-top { background: linear-gradient(to bottom, rgba(248, 250, 252, 0.88), transparent); }
.promo-overlay-dark.promo-overlay-bottom { background: linear-gradient(to top, rgba(248, 250, 252, 0.9), transparent); }
.promo-overlay-dark.promo-overlay-center { background: rgba(248, 250, 252, 0.72); }

.promo-overlay-title {
  margin: 0;
  font-size: clamp(1.1rem, 4.5vw, 1.8rem);
  font-weight: 800;
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.promo-overlay-dark .promo-overlay-title { text-shadow: none; }

.promo-overlay-text {
  margin: 0;
  font-size: clamp(0.85rem, 3.2vw, 1rem);
  line-height: 1.45;
  max-width: 34ch;
  opacity: 0.95;
}

.promo-overlay-button {
  margin-top: 4px;
  display: inline-block;
  padding: 10px 22px;
  border-radius: 999px;
  background: #fbbf24;
  color: #0b1220;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(251, 191, 36, 0.28);
}

.promo-overlay-button:hover { background: #fcd34d; }

/* Animations proposées dans le studio, rejouées à chaque affichage. */
.promo-anim-fade { animation: promo-fade 620ms ease both; }
.promo-anim-zoom { animation: promo-zoom 640ms cubic-bezier(0.2, 0.8, 0.25, 1) both; }
.promo-anim-slide { animation: promo-slide 520ms cubic-bezier(0.25, 0.9, 0.3, 1) both; }
.promo-anim-sparkle { animation: promo-sparkle 720ms ease both; }

@keyframes promo-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes promo-zoom { from { opacity: 0; transform: scale(1.12); } to { opacity: 1; transform: scale(1); } }
@keyframes promo-slide { from { opacity: 0.4; transform: translateX(14%); } to { opacity: 1; transform: translateX(0); } }
@keyframes promo-sparkle {
  0% { opacity: 0; filter: brightness(2.2) saturate(1.4); transform: scale(1.06); }
  45% { opacity: 1; filter: brightness(1.25); }
  100% { opacity: 1; filter: brightness(1); transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .promo-anim-fade,
  .promo-anim-zoom,
  .promo-anim-slide,
  .promo-anim-sparkle { animation: none; }
}

/* Étincelles : reprises du site pour que l'aperçu du studio soit identique. */
.promo-spark-layer { position: absolute; inset: 0; z-index: 70; overflow: hidden; pointer-events: none; }
.promo-spark {
  --spark-x: 0px; --spark-y: 0px; --spark-size: 6px; --spark-color: #fbbf24;
  --spark-delay: 0ms; --spark-duration: 850ms;
  position: absolute; left: 50%; top: 48%;
  width: var(--spark-size); height: var(--spark-size);
  border-radius: 999px; background: var(--spark-color);
  box-shadow: 0 0 8px var(--spark-color), 0 0 18px var(--spark-color);
  opacity: 0;
  animation: promo-spark-explosion var(--spark-duration) cubic-bezier(0.16, 0.8, 0.3, 1) var(--spark-delay) both;
}
.promo-spark-ambient { left: var(--spark-left); top: var(--spark-top); animation: promo-spark-drift var(--spark-duration) ease-out var(--spark-delay) both; }
@keyframes promo-spark-explosion {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.15) rotate(0deg); }
  14% { opacity: 1; }
  70% { opacity: 0.95; }
  100% { opacity: 0; transform: translate(calc(-50% + var(--spark-x)), calc(-50% + var(--spark-y))) scale(0) rotate(300deg); }
}
@keyframes promo-spark-drift {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.15) rotate(0deg); }
  18% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  72% { opacity: 0.9; }
  100% { opacity: 0; transform: translate(calc(-50% + var(--spark-x)), calc(-50% + var(--spark-y))) scale(0.2) rotate(210deg); }
}
.promo-image { width: 100%; height: 100%; object-fit: contain; object-position: center; background: #020617; }