/* ============================================================
   LE QG MOTORSPORT — Intro moteur (vue éclatée au scroll)
   Le moteur tourne au chargement, puis se démonte pièce par
   pièce au fil de la molette avant de révéler la page.
   ============================================================ */

.engine-scroll {
  position: relative;
  height: 430vh;
  background: var(--bg);
}

.engine-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 90% at 50% 40%, rgba(225, 6, 0, 0.06), transparent 60%),
    var(--bg);
}

/* Grille type plan technique */
.engine-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(110% 85% at 50% 45%, #000 0%, transparent 78%);
  mask-image: radial-gradient(110% 85% at 50% 45%, #000 0%, transparent 78%);
}

.engine-svg {
  position: relative;
  z-index: 2;
  width: min(94vw, 1040px);
  max-height: 88vh;
  overflow: visible;
  will-change: transform, opacity;
}

.engine-svg .ln {
  fill: none;
  stroke: #d9dde2;
  stroke-width: 2;
  stroke-opacity: 0.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.engine-svg .ln-soft { stroke-opacity: 0.28; stroke-width: 1.5; }
.engine-svg .ln-red  { stroke: var(--accent); stroke-opacity: 0.9; }
.engine-svg .fill-dark { fill: #0d0d0d; }
.engine-svg .fill-red  { fill: var(--accent); }

.engine-svg .plabel text {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  fill: #aeb4ba;
}
.engine-svg .plabel line { stroke: rgba(255, 255, 255, 0.35); stroke-width: 1; }
.engine-svg .plabel { opacity: 0; }

/* ---------- HUD ---------- */
.engine-hud {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  font-family: var(--font-mono);
  text-transform: uppercase;
}
.engine-hud .hud-tl,
.engine-hud .hud-tr,
.engine-hud .hud-bl {
  position: absolute;
  letter-spacing: 0.26em;
  font-size: 11px;
  color: var(--text-2);
}
.engine-hud .hud-tl { top: 28px; left: clamp(20px, 4vw, 48px); line-height: 2; }
.engine-hud .hud-tl b { color: var(--white); font-weight: 500; }
.engine-hud .hud-tr {
  top: 28px;
  right: clamp(20px, 4vw, 48px);
  text-align: right;
  line-height: 1.1;
}
.engine-hud .hud-tr strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.04em;
}
.engine-hud .hud-tr strong em { font-style: normal; color: var(--accent); }
.engine-hud .hud-bl { bottom: 32px; left: clamp(20px, 4vw, 48px); }
.engine-hud .hud-bl b { color: var(--accent); font-weight: 500; }

/* ---------- Indication molette ---------- */
.engine-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-2);
  pointer-events: none;
  text-align: center;
}
.engine-hint .mouse {
  width: 26px;
  height: 42px;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  border-radius: 14px;
  position: relative;
}
.engine-hint .mouse::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 50%;
  width: 3px;
  height: 8px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: var(--accent);
  animation: wheel-drop 1.6s ease-in-out infinite;
}
@keyframes wheel-drop {
  0%   { transform: translateY(0); opacity: 1; }
  70%  { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Titre central révélé par l'éclaté ---------- */
.engine-title {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-content: center;
  text-align: center;
  opacity: 0;
  pointer-events: none;
}
.engine-title .engine-logo {
  width: clamp(200px, 26vw, 320px);
  height: auto;
  margin: 0 auto 26px;
  filter: drop-shadow(0 20px 60px rgba(225, 6, 0, 0.35));
}
.engine-title h2 {
  font-size: clamp(48px, 8vw, 120px);
  line-height: 0.95;
}
.engine-title h2 span { color: var(--accent); }
.engine-title p {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(11px, 1.2vw, 13px);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-2);
}

/* ---------- Passer l'intro ---------- */
.engine-skip {
  position: absolute;
  bottom: 28px;
  right: clamp(20px, 4vw, 48px);
  z-index: 4;
  background: none;
  border: 1px solid var(--line-strong);
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 11px 18px;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), opacity 0.4s var(--ease);
}
.engine-skip:hover { color: var(--white); border-color: var(--white); }

/* ---------- Header masqué pendant l'intro ---------- */
body.intro-running .site-header {
  opacity: 0;
  transform: translateY(-16px);
  pointer-events: none;
}
.site-header { transition: opacity 0.5s var(--ease), transform 0.5s var(--ease), background 0.45s var(--ease), border-color 0.45s var(--ease), backdrop-filter 0.45s var(--ease); }

/* ---------- Responsive / accessibilité ---------- */
@media (max-width: 760px) {
  .engine-scroll { height: 360vh; }
  .engine-hud .hud-tl,
  .engine-hud .hud-bl { display: none; }
  .engine-hint { bottom: 110px; width: max-content; }
  .engine-skip { right: 50%; transform: translateX(50%); }
}

@media (prefers-reduced-motion: reduce) {
  .engine-scroll { display: none; }
}