/**
 * The Language Hub - Animation Styles
 * Scroll animations, hover effects, transitions
 *
 * @version 1.0.0
 */

/* ============================================
 * SCROLL ANIMATIONS
 * Uses Intersection Observer (see animations.js)
 * ============================================ */

/* Base animation state - hidden before in view */
[data-animate],
.animate {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
  transition-timing-function: var(--ease-smooth);
}

/* In view state - visible */
[data-animate].in-view,
.animate.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Fade In */
.fade-in {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.fade-in.in-view {
  opacity: 1;
}

/* Fade In Up */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.fade-in-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Fade In Down */
.fade-in-down {
  opacity: 0;
  transform: translateY(-40px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.fade-in-down.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Slide In Left */
.slide-in-left {
  opacity: 0;
  transform: translateX(-60px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.slide-in-left.in-view {
  opacity: 1;
  transform: translateX(0);
}

/* Slide In Right */
.slide-in-right {
  opacity: 0;
  transform: translateX(60px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.slide-in-right.in-view {
  opacity: 1;
  transform: translateX(0);
}

/* Scale In */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.scale-in.in-view {
  opacity: 1;
  transform: scale(1);
}

/* ============================================
 * STAGGER ANIMATIONS
 * For list items that animate in sequence
 * ============================================ */

.stagger-1 { transition-delay: 100ms; }
.stagger-2 { transition-delay: 200ms; }
.stagger-3 { transition-delay: 300ms; }
.stagger-4 { transition-delay: 400ms; }
.stagger-5 { transition-delay: 500ms; }
.stagger-6 { transition-delay: 600ms; }

/* ============================================
 * HOVER ANIMATIONS
 * ============================================ */

/* Card Lift Effect */
.hover-lift {
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

/* Card Glow Effect */
.hover-glow {
  transition:
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
  border-color: var(--color-primary);
}

/* Image Zoom Effect */
.hover-zoom {
  overflow: hidden;
}

.hover-zoom img {
  transition: transform var(--transition-slow);
}

.hover-zoom:hover img {
  transform: scale(1.08);
}

/* Link Underline Effect */
.hover-underline {
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

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

/* ============================================
 * TEXT ANIMATIONS
 * ============================================ */

/* Markeerstift Highlight Animation */
.text-highlight {
  position: relative;
  display: inline-block;
}

.text-highlight::after {
  content: '';
  position: absolute;
  bottom: 0.1em;
  left: -0.2em;
  right: -0.2em;
  height: 0.5em;
  background: var(--color-primary);
  opacity: 0.3;
  z-index: -1;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.text-highlight.in-view::after {
  transform: scaleX(1);
}

/* Typewriter effect (optional - requires JS) */
.typewriter {
  overflow: hidden;
  border-right: 3px solid var(--color-primary);
  white-space: nowrap;
  animation:
    typing 3.5s steps(40, end),
    blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--color-primary); }
}

/* ============================================
 * LOADING ANIMATIONS
 * ============================================ */

/* Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Pulse */
.pulse {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Skeleton Loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

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

/* ============================================
 * SPECIAL EFFECTS
 * ============================================ */

/* Glow Effect - for accent elements */
.glow {
  animation: glow-pulse 2s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
  from {
    text-shadow:
      0 0 10px rgba(255, 230, 0, 0.3),
      0 0 20px rgba(255, 230, 0, 0.2);
  }
  to {
    text-shadow:
      0 0 20px rgba(255, 230, 0, 0.5),
      0 0 30px rgba(255, 230, 0, 0.3),
      0 0 40px rgba(255, 230, 0, 0.2);
  }
}

/* Neon Text Effect */
.text-neon {
  color: var(--color-primary);
  text-shadow:
    0 0 10px rgba(255, 230, 0, 0.8),
    0 0 20px rgba(255, 230, 0, 0.6),
    0 0 30px rgba(255, 230, 0, 0.4);
  animation: neon-flicker 3s infinite alternate;
}

@keyframes neon-flicker {
  0%, 100% { opacity: 1; }
  41%, 44% { opacity: 0.98; }
  42%, 43% { opacity: 0.94; }
  45%, 55% { opacity: 1; }
}

/* Floating Animation */
.float {
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============================================
 * PARALLAX EFFECT
 * Controlled via JS
 * ============================================ */

.parallax {
  transform: translateZ(0);
  will-change: transform;
}

/* ============================================
 * PAGE TRANSITIONS
 * ============================================ */

/* Fade in page on load */
.page-enter {
  opacity: 0;
  animation: page-fade-in 0.5s ease-out forwards;
}

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

/* ============================================
 * REDUCED MOTION
 * Respect user preference for reduced motion
 * ============================================ */

@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;
  }

  [data-animate],
  .animate,
  .fade-in,
  .fade-in-up,
  .fade-in-down,
  .slide-in-left,
  .slide-in-right,
  .scale-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .text-highlight::after {
    transform: scaleX(1);
  }
}

/* ============================================
 * SMOOTH SCROLL
 * ============================================ */

html {
  scroll-behavior: smooth;
}

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