/* ═══════════════════════════════════════════════════════════
   APV SHOP — Animations & Transitions
   ═══════════════════════════════════════════════════════════ */

/* ─── Keyframes ────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

@keyframes slideOutRight {
  from { transform: translateX(0); }
  to   { transform: translateX(100%); }
}

@keyframes slideInLeft {
  from { transform: translateX(-100%); }
  to   { transform: translateX(0); }
}

@keyframes slideInUp {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@keyframes scaleIn {
  from { transform: scale(0.8); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

@keyframes scaleBounce {
  0%   { transform: scale(0); }
  50%  { transform: scale(1.2); }
  100% { transform: scale(1); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40%  { transform: translateY(-12px); }
  60%  { transform: translateY(-6px); }
}

@keyframes pulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@keyframes pulseGlow {
  0%   { box-shadow: 0 0 0 0 var(--color-accent-glow); }
  70%  { box-shadow: 0 0 0 10px rgba(230, 57, 70, 0); }
  100% { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes checkmark {
  0%   { stroke-dashoffset: 50; }
  100% { stroke-dashoffset: 0; }
}

@keyframes progressBar {
  from { width: 0; }
}

@keyframes floatBounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* ─── Scroll Animations (IntersectionObserver driven) ──── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slower) var(--ease-smooth),
              transform var(--duration-slower) var(--ease-smooth);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--duration-slower) var(--ease-smooth),
              transform var(--duration-slower) var(--ease-smooth);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--duration-slower) var(--ease-smooth),
              transform var(--duration-slower) var(--ease-smooth);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--duration-slower) var(--ease-smooth),
              transform var(--duration-slower) var(--ease-smooth);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children .reveal:nth-child(1) { transition-delay: 0ms; }
.stagger-children .reveal:nth-child(2) { transition-delay: 100ms; }
.stagger-children .reveal:nth-child(3) { transition-delay: 200ms; }
.stagger-children .reveal:nth-child(4) { transition-delay: 300ms; }
.stagger-children .reveal:nth-child(5) { transition-delay: 400ms; }
.stagger-children .reveal:nth-child(6) { transition-delay: 500ms; }
.stagger-children .reveal:nth-child(7) { transition-delay: 600ms; }
.stagger-children .reveal:nth-child(8) { transition-delay: 700ms; }

/* ─── Page loading bar ─────────────────────────────────── */
.page-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--color-accent);
  z-index: 9999;
  transition: width 0.4s ease;
  box-shadow: 0 0 8px var(--color-accent-glow);
}

.page-progress.complete {
  width: 100%;
  opacity: 0;
  transition: width 0.2s ease, opacity 0.3s ease 0.3s;
}

/* ─── Hover underline animation ────────────────────────── */
.hover-underline {
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-smooth),
              left var(--duration-normal) var(--ease-smooth);
}

.hover-underline:hover::after,
.hover-underline.active::after {
  width: 100%;
  left: 0;
}

/* ─── Image blur-up placeholder ────────────────────────── */
.img-placeholder {
  background: var(--color-bg-alt);
  position: relative;
  overflow: hidden;
}

.img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(255,255,255,0.1) 50%,
    transparent 100%);
  animation: shimmer 1.5s infinite;
  background-size: 200% 100%;
}

.img-placeholder img {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-smooth);
}

.img-placeholder img.loaded {
  opacity: 1;
}

/* ─── Cart animation ───────────────────────────────────── */
.cart-bounce {
  animation: scaleBounce 0.4s var(--ease-bounce);
}

.cart-count-pulse {
  animation: pulse 0.3s var(--ease-smooth);
}

/* ─── Scroll to top ────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-smooth);
  z-index: var(--z-sticky);
  box-shadow: 0 4px 20px var(--color-accent-glow);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-2px) rotate(5deg);
  box-shadow: 0 6px 24px var(--color-accent-glow);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}