/**
 * NORA Website - Animation Styles
 * Keyframes, scroll effects, and ambient animations
 */

/* ========================================
   Starfield Background
   ======================================== */

.starfield {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* Star layers for depth */
.starfield::before,
.starfield::after,
.starfield .star-layer {
  content: '';
  position: absolute;
  inset: 0;
}

/* Small distant stars */
.starfield::before {
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 20% 50%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 30% 30%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1px 1px at 40% 70%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 50% 40%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 60% 80%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 70% 10%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1px 1px at 80% 60%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 90% 25%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 15% 85%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 25% 15%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1px 1px at 35% 65%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 45% 35%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 55% 95%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 65% 45%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1px 1px at 75% 75%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 85% 5%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 95% 55%, rgba(255, 255, 255, 0.6), transparent);
  background-size: 250px 250px;
  animation: twinkle-slow 8s ease-in-out infinite alternate;
}

/* Medium stars */
.starfield::after {
  background-image:
    radial-gradient(2px 2px at 5% 15%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 15% 45%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(2px 2px at 25% 75%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(2px 2px at 35% 25%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 45% 55%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 55% 85%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(2px 2px at 65% 35%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(2px 2px at 75% 65%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(2px 2px at 85% 95%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(2px 2px at 95% 5%, rgba(255, 255, 255, 0.7), transparent);
  background-size: 300px 300px;
  animation: twinkle-medium 5s ease-in-out infinite alternate;
}

/* Large bright stars (golden) */
.star-layer--gold {
  background-image:
    radial-gradient(3px 3px at 12% 28%, var(--gold-primary), transparent),
    radial-gradient(3px 3px at 38% 72%, var(--gold-bright), transparent),
    radial-gradient(3px 3px at 62% 18%, var(--gold-primary), transparent),
    radial-gradient(3px 3px at 88% 58%, var(--gold-bright), transparent),
    radial-gradient(2px 2px at 28% 88%, var(--gold-primary), transparent),
    radial-gradient(2px 2px at 72% 42%, var(--gold-bright), transparent);
  background-size: 400px 400px;
  animation: twinkle-gold 3s ease-in-out infinite alternate;
}

@keyframes twinkle-slow {
  0% { opacity: 0.4; }
  100% { opacity: 0.8; }
}

@keyframes twinkle-medium {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

@keyframes twinkle-gold {
  0% { opacity: 0.3; transform: scale(1); }
  100% { opacity: 0.7; transform: scale(1.1); }
}

/* ========================================
   Floating Particles
   ======================================== */

.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  opacity: 0;
  animation: particle-float 10s ease-in-out infinite;
}

.particle--gold {
  background: var(--gold-glow);
  box-shadow: 0 0 10px var(--gold-glow);
}

.particle--white {
  background: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.particle--amethyst {
  background: rgba(167, 139, 250, 0.4);
  box-shadow: 0 0 10px rgba(167, 139, 250, 0.3);
}

/* Particle sizes */
.particle--sm { width: 3px; height: 3px; }
.particle--md { width: 5px; height: 5px; }
.particle--lg { width: 8px; height: 8px; }

/* Particle positions and timing */
.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 12s; }
.particle:nth-child(2) { left: 20%; top: 80%; animation-delay: 1s; animation-duration: 10s; }
.particle:nth-child(3) { left: 30%; top: 40%; animation-delay: 2s; animation-duration: 14s; }
.particle:nth-child(4) { left: 40%; top: 60%; animation-delay: 0.5s; animation-duration: 11s; }
.particle:nth-child(5) { left: 50%; top: 30%; animation-delay: 1.5s; animation-duration: 13s; }
.particle:nth-child(6) { left: 60%; top: 70%; animation-delay: 2.5s; animation-duration: 9s; }
.particle:nth-child(7) { left: 70%; top: 50%; animation-delay: 0.8s; animation-duration: 15s; }
.particle:nth-child(8) { left: 80%; top: 25%; animation-delay: 1.8s; animation-duration: 10s; }
.particle:nth-child(9) { left: 90%; top: 85%; animation-delay: 2.8s; animation-duration: 12s; }
.particle:nth-child(10) { left: 5%; top: 55%; animation-delay: 0.3s; animation-duration: 11s; }
.particle:nth-child(11) { left: 85%; top: 15%; animation-delay: 1.3s; animation-duration: 14s; }
.particle:nth-child(12) { left: 45%; top: 90%; animation-delay: 2.3s; animation-duration: 13s; }

@keyframes particle-float {
  0% {
    opacity: 0;
    transform: translateY(100px) translateX(0);
  }
  10% {
    opacity: 0.8;
  }
  90% {
    opacity: 0.8;
  }
  100% {
    opacity: 0;
    transform: translateY(-100px) translateX(20px);
  }
}

/* ========================================
   Scroll-Triggered Reveals
   ======================================== */

/* Base reveal state */
[data-reveal] {
  opacity: 0;
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
}

[data-reveal].is-revealed {
  opacity: 1;
}

/* Reveal variants */
[data-reveal="fade-up"] {
  transform: translateY(40px);
}

[data-reveal="fade-up"].is-revealed {
  transform: translateY(0);
}

[data-reveal="fade-down"] {
  transform: translateY(-40px);
}

[data-reveal="fade-down"].is-revealed {
  transform: translateY(0);
}

[data-reveal="fade-left"] {
  transform: translateX(-40px);
}

[data-reveal="fade-left"].is-revealed {
  transform: translateX(0);
}

[data-reveal="fade-right"] {
  transform: translateX(40px);
}

[data-reveal="fade-right"].is-revealed {
  transform: translateX(0);
}

[data-reveal="scale"] {
  transform: scale(0.9);
}

[data-reveal="scale"].is-revealed {
  transform: scale(1);
}

[data-reveal="scale-up"] {
  transform: scale(0.9) translateY(20px);
}

[data-reveal="scale-up"].is-revealed {
  transform: scale(1) translateY(0);
}

/* Staggered children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s var(--ease-out),
              transform 0.5s var(--ease-out);
}

[data-reveal-stagger].is-revealed > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-stagger].is-revealed > *:nth-child(2) { transition-delay: 100ms; }
[data-reveal-stagger].is-revealed > *:nth-child(3) { transition-delay: 200ms; }
[data-reveal-stagger].is-revealed > *:nth-child(4) { transition-delay: 300ms; }
[data-reveal-stagger].is-revealed > *:nth-child(5) { transition-delay: 400ms; }
[data-reveal-stagger].is-revealed > *:nth-child(6) { transition-delay: 500ms; }

[data-reveal-stagger].is-revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Hover Effects
   ======================================== */

/* Card hover glow */
.hover-glow {
  position: relative;
}

.hover-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(
    135deg,
    var(--gold-glow),
    transparent 50%,
    var(--gold-glow)
  );
  border-radius: inherit;
  opacity: 0;
  z-index: -1;
  transition: opacity var(--duration-normal) var(--ease-default);
}

.hover-glow:hover::before {
  opacity: 1;
}

/* Shimmer effect */
.shimmer {
  position: relative;
  overflow: hidden;
}

.shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  50%, 100% { left: 100%; }
}

/* ========================================
   Loading States
   ======================================== */

.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
}

.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.05),
    transparent
  );
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

@keyframes skeleton-pulse {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--gold-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ========================================
   Gradient Animations
   ======================================== */

/* Animated gradient background */
.gradient-animate {
  background: linear-gradient(
    -45deg,
    var(--bg-void),
    var(--bg-cosmos),
    var(--bg-nebula),
    var(--bg-card)
  );
  background-size: 400% 400%;
  animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

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

@keyframes gold-pulse {
  0%, 100% {
    box-shadow: 0 0 20px var(--gold-glow);
  }
  50% {
    box-shadow: 0 0 40px rgba(242, 201, 76, 0.5);
  }
}

/* ========================================
   Text Animations
   ======================================== */

/* Typing effect (for spans with character animation) */
.type-effect {
  display: inline-block;
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid var(--gold-primary);
  animation: typing 3s steps(30) 1s forwards,
             blink 0.75s step-end infinite;
}

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

@keyframes blink {
  50% { border-color: transparent; }
}

/* Gradient text animation */
.text-gradient-animate {
  background: linear-gradient(
    90deg,
    var(--gold-bright),
    var(--gold-primary),
    var(--accent-amethyst),
    var(--gold-bright)
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-text 4s linear infinite;
}

@keyframes gradient-text {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

/* ========================================
   Ambient Effects
   ======================================== */

/* Nebula glow */
.nebula-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(
    circle at center,
    rgba(167, 139, 250, 0.15) 0%,
    transparent 70%
  );
  filter: blur(60px);
  pointer-events: none;
  animation: nebula-drift 20s ease-in-out infinite;
}

@keyframes nebula-drift {
  0%, 100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(50px, -30px);
  }
  50% {
    transform: translate(-20px, 40px);
  }
  75% {
    transform: translate(30px, 20px);
  }
}

/* Aurora effect */
.aurora {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.3;
}

.aurora::before,
.aurora::after {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 20%,
    rgba(96, 165, 250, 0.1) 30%,
    rgba(167, 139, 250, 0.1) 50%,
    rgba(244, 114, 182, 0.1) 70%,
    transparent 80%
  );
}

.aurora::before {
  top: -50%;
  left: -50%;
  animation: aurora-wave 15s ease-in-out infinite;
}

.aurora::after {
  bottom: -50%;
  right: -50%;
  animation: aurora-wave 20s ease-in-out infinite reverse;
}

@keyframes aurora-wave {
  0%, 100% {
    transform: rotate(0deg) translateY(0);
  }
  50% {
    transform: rotate(5deg) translateY(-50px);
  }
}

/* ========================================
   Page Transition
   ======================================== */

@keyframes page-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

body {
  animation: page-enter var(--duration-slow) var(--ease-out);
}

/* ========================================
   Reduced Motion Override
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  body,
  .starfield::before,
  .starfield::after,
  .star-layer--gold,
  .particle,
  .nebula-glow,
  .aurora::before,
  .aurora::after,
  .shimmer::after,
  .skeleton::after,
  .spinner,
  .type-effect,
  [data-reveal],
  [data-reveal-stagger] > * {
    animation: none !important;
    transition: none !important;
  }

  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
  }
}