/* ==========================================================================
   KITSUN SYSTEM - 02 · L'atelier vidéo en 3D
   Styles de la scène repris du composant « Agentic Factory 3D » (mode intégré),
   portés sur .atelier-3d, aux couleurs de la marque.
   ========================================================================== */

.videos { padding-top: clamp(84px, 11vw, 140px); }
.atelier { position: relative; height: min(100svh, 880px); min-height: 640px; }

/* Colonne de gauche : titre, étapes, actions (la machine occupe les 58 % de droite) */
.atelier-copy {
  position: relative;
  z-index: 2;
  height: 100%;
  width: min(44%, 560px);
  margin-left: max(var(--gutter), calc((100vw - var(--container)) / 2 + var(--gutter)));
  display: flex;
  flex-direction: column;
  justify-content: center;
  pointer-events: none;
}
.atelier-copy > * { pointer-events: auto; }
.atelier-copy h2 { margin: 14px 0 26px; font-size: clamp(36px, 4.6vw, 64px); font-weight: 600; line-height: 1.02; letter-spacing: -0.035em; }
.atelier-steps { list-style: none; padding: 0; display: grid; gap: 8px; max-width: 360px; counter-reset: none; }
.atelier-steps button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 16px;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-2);
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-bd);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: color 0.3s ease, background 0.3s ease, border-color 0.3s ease, transform 0.4s var(--ease), box-shadow 0.3s ease;
}
.atelier-steps button span { font-family: var(--font-display); font-size: 13px; color: var(--violet-300); letter-spacing: 0.08em; }
.atelier-steps button:hover { color: var(--text); background: rgba(255, 255, 255, 0.08); transform: translateX(4px); }
.atelier-steps button.is-on { color: #fff; background: linear-gradient(135deg, rgba(169, 116, 255, 0.45), rgba(116, 40, 230, 0.35)); border-color: var(--glass-bd-strong); box-shadow: var(--glass-hi), 0 14px 34px -14px rgba(139, 61, 255, 0.9); transform: translateX(8px); }
.atelier-steps button.is-on span { color: #fff; }
.atelier-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

/* La scène */
.atelier-3d {
  --a3-accent: #a974ff;
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  contain: layout;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
}
.atelier-3d #scene { position: absolute; inset: 0; outline: none; }
.atelier-3d #scene canvas { display: block; width: 100%; height: 100%; opacity: 0; transition: opacity 1.2s var(--ease); }
.atelier-3d.is-ready #scene canvas { opacity: 1; }
.atelier-3d .vignette { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(ellipse at 71% 48%, transparent 34%, rgba(11, 8, 16, 0.35) 68%, rgba(11, 8, 16, 0.85)); }
.atelier-3d #labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.atelier-3d .station-label { position: absolute; left: 0; top: 0; opacity: 0; transition: opacity 0.3s; will-change: transform; pointer-events: none; min-width: 138px; }
.atelier-3d .station-label.visible { opacity: 1; }
.atelier-3d .station-label .stem { height: 26px; width: 1px; margin-left: 10px; background: linear-gradient(rgba(169, 116, 255, 0), rgba(169, 116, 255, 0.7)); }
.atelier-3d .station-label .label-card { padding: 10px 13px; border-radius: 10px; background: var(--glass-bg), rgba(20, 14, 30, 0.7); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border: 1px solid var(--glass-bd); }
.atelier-3d .station-label .label-title { display: flex; gap: 10px; align-items: center; font-size: 12px; font-weight: 700; white-space: nowrap; }
.atelier-3d .station-label .label-title span, .atelier-3d #tooltip strong span { color: var(--a3-accent); font-family: var(--font-display); font-size: 10px; }
.atelier-3d .station-label .label-meta { margin: 6px 0 0 24px; font-size: 9px; color: var(--text-3); white-space: nowrap; }
.atelier-3d #tooltip {
  position: absolute;
  z-index: 10;
  max-width: 250px;
  padding: 11px 14px;
  border-radius: 12px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  background: var(--glass-bg), rgba(20, 14, 30, 0.72);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-bd);
  box-shadow: var(--glass-hi), 0 8px 32px rgba(0, 0, 0, 0.45);
}
.atelier-3d #tooltip.visible { opacity: 1; }
.atelier-3d #tooltip strong { font-size: 13px; font-weight: 700; }
.atelier-3d #tooltip strong span { margin-right: 8px; }
.atelier-3d #tooltip p { margin: 6px 0 0; font-size: 12px; line-height: 1.5; color: var(--text-2); }
.atelier-3d #loading { position: absolute; left: 71%; top: 48%; z-index: 20; display: flex; align-items: center; gap: 12px; transform: translate(-50%, -50%); font-size: 12px; color: var(--text-3); transition: opacity 0.4s; }
.atelier-3d #loading i { width: 18px; height: 18px; border-radius: 50%; border: 1px solid rgba(169, 116, 255, 0.2); border-top-color: var(--a3-accent); animation: spin 1s linear infinite; }
.atelier-3d #loading.done { opacity: 0; pointer-events: none; }
.atelier-3d #error { display: none; position: absolute; left: 50%; right: 7%; top: 38%; z-index: 21; padding: 22px 24px; border-radius: var(--radius-card); font-size: 14px; line-height: 1.6; background: var(--glass-bg), rgba(20, 14, 30, 0.8); border: 1px solid var(--glass-bd-strong); }
.atelier-3d #error strong { color: var(--violet-200); }
.atelier-3d #error p { margin-top: 6px; color: var(--text-2); }
/* Si three.js n'a pas pu se charger (CDN bloqué, hors ligne) */
.atelier-3d.is-error #error { display: block; }
.atelier-3d.is-error #loading { display: none; }

@media (max-width: 900px) {
  .atelier { height: auto; min-height: 0; }
  .atelier-copy { width: auto; height: auto; margin: 0; padding: 0 var(--gutter); }
  .atelier-copy h2 { margin-bottom: 18px; }
  .atelier-steps { grid-template-columns: repeat(5, minmax(0, 1fr)); max-width: none; gap: 6px; }
  .atelier-steps button { flex-direction: column; align-items: flex-start; gap: 4px; padding: 9px 10px; font-size: 12.5px; }
  .atelier-steps button.is-on, .atelier-steps button:hover { transform: none; }
  .atelier-actions { margin-top: 16px; }
  .atelier-3d { position: relative; height: 70svh; min-height: 420px; }
  .atelier-3d .vignette { background: radial-gradient(ellipse at center, transparent 34%, rgba(11, 8, 16, 0.6) 100%); }
  .atelier-3d #loading { left: 50%; }
  .atelier-3d #error { left: 7%; right: 7%; top: 30%; }
}
@media (max-width: 520px) {
  .atelier-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .atelier-actions .btn { flex: 1 1 100%; }
}