/* =====================================================================
   DONUTSMP SHOP — ANIMATIONS
   Keyframes + scroll-reveal utility classes used across every page.
   Paired with js/animations.js, which toggles the .in-view class via
   IntersectionObserver.
   ===================================================================== */

/* ---------------------------------------------------------------------
   Keyframes
   --------------------------------------------------------------------- */
@keyframes shimmer {
  to { background-position: 200% center; }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

@keyframes pulse-scale {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.88); opacity: 0.75; }
}

@keyframes loader-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

@keyframes skeleton-sweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes float-y {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-18px) rotate(3deg); }
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px) scale(0.95); }
  to { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to { opacity: 0; transform: translateX(40px) scale(0.9); }
}

@keyframes fade-slide-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-28px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 0 1px rgba(147,51,234,0.25), 0 0 20px rgba(147,51,234,0.25); }
  50% { box-shadow: 0 0 0 1px rgba(147,51,234,0.4), 0 0 40px rgba(147,51,234,0.45); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------------------------------------------------------------------
   Page load sequence
   --------------------------------------------------------------------- */
.page-transition-in {
  animation: fade-in var(--dur-slow, 0.6s) var(--ease-out, ease) both;
}

/* ---------------------------------------------------------------------
   Scroll-reveal utilities
   Elements start hidden/offset, and gain `.in-view` once they cross
   the viewport threshold (see js/animations.js).
   --------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transition: opacity 0.7s var(--ease-out, ease), transform 0.7s var(--ease-out, ease);
  will-change: opacity, transform;
}

[data-reveal="up"] { transform: translateY(32px); }
[data-reveal="down"] { transform: translateY(-32px); }
[data-reveal="left"] { transform: translateX(-32px); }
[data-reveal="right"] { transform: translateX(32px); }
[data-reveal="scale"] { transform: scale(0.94); }
[data-reveal="fade"] { transform: none; }

[data-reveal].in-view {
  opacity: 1;
  transform: none;
}

/* Stagger children of a revealed group (set --stagger-index inline or via JS) */
[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out, ease), transform 0.6s var(--ease-out, ease);
  transition-delay: calc(var(--stagger-index, 0) * 70ms);
}

[data-reveal-group].in-view > * {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-reveal-group] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ---------------------------------------------------------------------
   Reusable animation helper classes
   --------------------------------------------------------------------- */
.anim-fade-in { animation: fade-in 0.5s var(--ease-out, ease) both; }
.anim-slide-up { animation: slide-up 0.6s var(--ease-out, ease) both; }
.anim-slide-down { animation: slide-down 0.6s var(--ease-out, ease) both; }
.anim-scale-in { animation: scale-in 0.4s var(--ease-spring, ease) both; }
.anim-glow-pulse { animation: glow-pulse 2.4s ease-in-out infinite; }

.spin {
  animation: spin 0.8s linear infinite;
}

/* Hover lift, applied to any card-like element */
.hover-lift {
  transition: transform 0.35s var(--ease-out, ease), box-shadow 0.35s var(--ease-out, ease);
}

.hover-lift:hover {
  transform: translateY(-6px);
}

/* Button glow ring on hover/focus, layered above .btn */
.glow-ring {
  position: relative;
}

.glow-ring::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: var(--grad-brand, linear-gradient(135deg,#7c3aed,#d946ef));
  opacity: 0;
  z-index: -1;
  filter: blur(10px);
  transition: opacity 0.3s ease;
}

.glow-ring:hover::before {
  opacity: 0.7;
}