/* ===========================================
   Animations - Keyframes & Scroll Effects
   =========================================== */

/* ===== Keyframe Definitions ===== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInDownCentered {
  from {
    opacity: 0;
    transform: translate(-50%, -20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@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 scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

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

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

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

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

@keyframes lineGrow {
  from {
    clip-path: inset(100% 0 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

/* ===== Hero Animations ===== */

.hero-content {
  animation: fadeInUp 0.8s var(--easing-smooth) forwards;
}

.hero-title {
  animation: fadeInUp 0.8s var(--easing-smooth) 0.1s forwards;
  opacity: 0;
}

.hero-subtitle {
  animation: fadeInUp 0.8s var(--easing-smooth) 0.2s forwards;
  opacity: 0;
}

.hero-tagline {
  animation: fadeInUp 0.8s var(--easing-smooth) 0.3s forwards;
  opacity: 0;
}

.hero .social-links {
  animation: fadeInUp 0.8s var(--easing-smooth) 0.4s forwards;
  opacity: 0;
}

.scroll-indicator {
  animation: fadeIn 1s var(--easing-smooth) 1s forwards;
  opacity: 0;
}

/* ===== Scroll Animation Classes ===== */

/* Initial hidden state */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--easing-smooth),
              transform 0.6s var(--easing-smooth);
}

[data-animate="fade"] {
  transform: none;
}

[data-animate="scale"] {
  transform: scale(0.95);
}

[data-animate="slide-left"] {
  transform: translateX(-30px);
}

[data-animate="slide-right"] {
  transform: translateX(30px);
}

/* Visible state */
[data-animate].visible {
  opacity: 1;
  transform: translateY(0) scale(1) translateX(0);
}

/* Stagger delays for children */
[data-stagger] > *:nth-child(1) { transition-delay: 0ms; }
[data-stagger] > *:nth-child(2) { transition-delay: 75ms; }
[data-stagger] > *:nth-child(3) { transition-delay: 150ms; }
[data-stagger] > *:nth-child(4) { transition-delay: 225ms; }
[data-stagger] > *:nth-child(5) { transition-delay: 300ms; }
[data-stagger] > *:nth-child(6) { transition-delay: 375ms; }

/* ===== Gradient Text Animation ===== */

.gradient-text {
  background: var(--gradient-text);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-animated {
  background: linear-gradient(
    90deg,
    var(--accent-primary),
    var(--accent-secondary),
    var(--accent-tertiary),
    var(--accent-primary)
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 8s ease infinite;
}

/* ===== Timeline Animation ===== */

.timeline.visible::before {
  animation: lineGrow 1.5s var(--easing-smooth) forwards;
}

.timeline-item {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s var(--easing-smooth),
              transform 0.5s var(--easing-smooth);
}

.timeline.visible .timeline-item:nth-child(1) {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 0.2s;
}
.timeline.visible .timeline-item:nth-child(2) {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 0.4s;
}
.timeline.visible .timeline-item:nth-child(3) {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 0.6s;
}
.timeline.visible .timeline-item:nth-child(4) {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 0.8s;
}
.timeline.visible .timeline-item:nth-child(5) {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 1s;
}

/* ===== Nav Animation ===== */

.nav {
  animation: fadeInDownCentered 0.5s var(--easing-smooth) 0.5s forwards;
  opacity: 0;
}

/* ===== Hover Micro-interactions ===== */

.hover-lift {
  transition: transform var(--transition-base) var(--easing-smooth);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

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

.page-content {
  position: relative;
  z-index: 1;
}

/* ===== Reduced Motion Overrides ===== */

@media (prefers-reduced-motion: reduce) {
  [data-animate],
  .hero-content,
  .hero-title,
  .hero-subtitle,
  .hero-tagline,
  .hero .social-links,
  .scroll-indicator,
  .nav,
  .timeline-item,
  .gradient-text-animated {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .timeline.visible::before {
    animation: none;
    clip-path: none;
  }

  .scroll-line {
    animation: none;
  }
}