/* ============================================================
   UNIVRS WEB — Motion (subtle)
   Garde le site vivant sans ajouter d'éléments.
   ============================================================ */

/* ─── Scroll reveal ─── */
.reveal {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition:
    opacity 700ms cubic-bezier(0.16,1,0.3,1),
    transform 700ms cubic-bezier(0.16,1,0.3,1);
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: translate3d(0,0,0);
}

/* ─── Card hover: subtle scan reflection ─── */
.card, .price-card, .project-card, .testimonial, .value-cell {
  overflow: hidden;
}
.card .scan,
.price-card .scan,
.project-card .scan,
.testimonial .scan,
.value-cell .scan {
  position: absolute; inset: 0;
  background: linear-gradient(110deg,
    transparent 0%, transparent 42%,
    rgba(255,255,255,.45) 50%,
    transparent 58%, transparent 100%);
  transform: translateX(-120%);
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: 0;
  transition: opacity 200ms;
}
.card:hover .scan,
.price-card:hover .scan,
.project-card:hover .scan,
.testimonial:hover .scan,
.value-cell:hover .scan {
  opacity: 1;
  animation: cardScan 1000ms cubic-bezier(0.16,1,0.3,1) forwards;
}
@keyframes cardScan {
  to { transform: translateX(120%); }
}

/* ─── Project frame: subtle scanline while hovering ─── */
.project-card .frame { position: relative; }
.project-card .frame .scanline {
  position: absolute; left: 0; right: 0; top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.7), transparent);
  opacity: 0;
  pointer-events: none;
}
.project-card:hover .frame .scanline {
  opacity: 1;
  animation: scanlineDown 1600ms cubic-bezier(0.4,0,0.6,1) infinite;
}
@keyframes scanlineDown {
  from { top: 0; opacity: 0; }
  10%  { opacity: .8; }
  90%  { opacity: .8; }
  to   { top: 100%; opacity: 0; }
}

/* ─── Buttons: subtle specular sweep at idle, hover shine on enter ─── */
.btn-primary {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.btn-primary > * { position: relative; z-index: 2; }

/* Idle: one clean specular pass per ~6s with a long pause */
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg,
    transparent 0%, transparent 38%,
    rgba(255,255,255,.55) 50%,
    transparent 62%, transparent 100%);
  transform: translateX(-110%);
  pointer-events: none;
  z-index: 1;
  animation: btn-sweep 6s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
  mix-blend-mode: overlay;
}
@keyframes btn-sweep {
  0%        { transform: translateX(-110%); }
  28%, 100% { transform: translateX( 160%); }
}

/* Hover: instant accelerated sweep */
.btn-primary:hover::before {
  animation: btn-sweep-hover 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes btn-sweep-hover {
  0%   { transform: translateX(-110%); }
  100% { transform: translateX( 160%); }
}

.btn-secondary { overflow: hidden; position: relative; }
.btn-secondary::after {
  content: '';
  position: absolute; top: 0; left: -60%; width: 50%; bottom: 0;
  background: linear-gradient(105deg,
    transparent 0%, rgba(95,102,115,.18) 50%, transparent 100%);
  pointer-events: none;
  transform: skewX(-20deg);
  transition: left 700ms cubic-bezier(0.16,1,0.3,1);
}
.btn-secondary:hover::after { left: 110%; }

/* ─── FAQ active chrome bar ─── */
.faq-item {
  position: relative;
  transition: background 300ms;
}
.faq-item::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--chrome-gradient);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 500ms cubic-bezier(0.16,1,0.3,1);
}
.faq-item.open::before { transform: scaleY(1); }
.faq-item.open { background: linear-gradient(90deg, rgba(95,102,115,.04), transparent); }

/* ─── Reduced motion ─── */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .project-card:hover .frame .scanline,
  .card:hover .scan, .price-card:hover .scan,
  .project-card:hover .scan, .testimonial:hover .scan,
  .value-cell:hover .scan,
  .btn-primary {
    animation: none !important;
  }
}