/* ================================
   SHIMMER (skeleton)
   ================================ */

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

  100% {
    background-position: -200% 0;
  }
}

/* ================================
   COUNTERS
   ================================ */

.counter {
  display: inline-block;
  font-variant-numeric: tabular-nums;
  transition: all var(--duration-normal);
}

/* ================================
   PARALLAX
   ================================ */

.parallax {
  will-change: transform;
}

/* ================================
   FLOATING PARTICLES
   ================================ */

.particle {
  position: absolute;
  border-radius: var(--radius-full);
  pointer-events: none;
  animation: float-up linear infinite;
  opacity: 0;
}

@keyframes float-up {
  0% {
    transform: translateY(0) scale(0);
    opacity: 0;
  }

  10% {
    opacity: 0.6;
  }

  90% {
    opacity: 0.2;
  }

  100% {
    transform: translateY(-200px) scale(1.5);
    opacity: 0;
  }
}

/* ================================
   FADE TRANSITIONS
   ================================ */

.fade-enter {
  opacity: 0;
  transform: translateY(8px);
}

.fade-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: all var(--duration-normal) var(--ease-out);
}

.fade-exit {
  opacity: 1;
}

.fade-exit-active {
  opacity: 0;
  transform: translateY(-8px);
  transition: all var(--duration-normal) var(--ease-in);
}

/* ================================
   HOVER TILT (cards)
   ================================ */

.tilt-card {
  transform-style: preserve-3d;
  transform: perspective(1000px);
  transition: transform var(--duration-normal) var(--ease-out);
  will-change: transform;
}

.tilt-card__inner {
  transform-style: preserve-3d;
}

.tilt-card__shine {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 60%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal);
}

.tilt-card:hover .tilt-card__shine {
  opacity: 1;
}

/* ================================
   READING PROGRESS
   ================================ */

.reading-progress {
  position: fixed;
  top: var(--header-height);
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary-400), var(--color-primary-600));
  width: 0%;
  z-index: var(--z-sticky);
  transition: width 100ms linear;
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
  box-shadow: 0 0 12px rgba(116, 129, 146, 0.35);
}

/* ================================
   TOASTS
   ================================ */

.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: var(--z-toast);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  pointer-events: all;
  min-width: 300px;
  max-width: 400px;
  border: 1px solid var(--color-neutral-100);
  animation: toast-in var(--duration-normal) var(--ease-spring) forwards;
}

.toast.is-leaving {
  animation: toast-out var(--duration-normal) var(--ease-in) forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }

  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 1px;
}

.toast--success .toast__icon {
  color: var(--color-success);
}

.toast--error .toast__icon {
  color: var(--color-error);
}

.toast--warning .toast__icon {
  color: var(--color-warning);
}

.toast--info .toast__icon {
  color: var(--color-info);
}

.toast__body {
}

.toast__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-neutral-900);
}

.toast__message {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
  margin-top: 2px;
}

.toast__close {
  margin-left: auto;
  color: var(--color-neutral-400);
  flex-shrink: 0;
  transition: color var(--duration-fast);
}

.toast__close:hover {
  color: var(--color-neutral-700);
}