/* ── Scroll-Triggered Animations ── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-slide-right {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

.animate-on-slide-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.animate-on-slide-left {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

.animate-on-slide-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.animate-on-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

.animate-on-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

.animate-on-fade {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-default);
}

.animate-on-fade.is-visible {
  opacity: 1;
}

/* ── Stagger Support ── */
.animate-on-scroll.is-visible > *,
.animate-on-slide-right.is-visible > *,
.animate-on-slide-left.is-visible > *,
.animate-on-scale.is-visible > * {
  transition-delay: calc(var(--stagger-index, 0) * 80ms);
}

/* ── Micro-Interactions ── */
.hover-lift {
  transition: transform var(--duration-normal) var(--ease-default),
              box-shadow var(--duration-normal) var(--ease-default);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.hover-scale {
  transition: transform var(--duration-fast) var(--ease-default);
}

.hover-scale:hover {
  transform: scale(1.02);
}

.hover-scale:active {
  transform: scale(0.98);
}

.hover-underline {
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  inset-inline-start: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-default);
}

.hover-underline:hover::after {
  width: 100%;
}

/* ── Loading Animations ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-pulse {
  animation: pulse 1.5s ease-in-out infinite;
}

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

.animate-spin {
  animation: spin 1s linear infinite;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(90deg,
    var(--color-bg-alt) 25%,
    var(--color-border-light) 50%,
    var(--color-bg-alt) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* ── Toast Animations ── */
@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

.toast-enter {
  animation: slideInRight var(--duration-normal) var(--ease-default);
}

.toast-exit {
  animation: slideOutRight var(--duration-fast) var(--ease-default);
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-backdrop-enter {
  animation: fadeIn var(--duration-normal) var(--ease-default);
}

.modal-content-enter {
  animation: scaleIn var(--duration-normal) var(--ease-default);
}

/* ── Button Animations ── */
.btn-press {
  transition: transform var(--duration-fast) var(--ease-default);
}

.btn-press:active {
  transform: scale(0.97);
}

/* ── Reduced Motion Support ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Scroll Behavior ── */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}