/* ═══════════════════════════════════════════
   Animations & Transitions
   ═══════════════════════════════════════════ */

/* ── Keyframes ── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

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

@keyframes float-gentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.3; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.3); }
}

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

@keyframes float-tag {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-12px) rotate(1deg);
  }
  50% {
    transform: translateY(-6px) rotate(-1deg);
  }
  75% {
    transform: translateY(-15px) rotate(0.5deg);
  }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(212, 120, 156, 0.1);
  }
  50% {
    box-shadow: 0 0 40px rgba(212, 120, 156, 0.25);
  }
}

@keyframes drift {
  0%, 100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(10px, -15px);
  }
  50% {
    transform: translate(-5px, -25px);
  }
  75% {
    transform: translate(-15px, -10px);
  }
}

@keyframes grid-pulse {
  0%, 100% { opacity: 0.03; }
  50% { opacity: 0.08; }
}

/* ── Tag floating animation ── */
.tag-float {
  animation: float-tag 6s ease-in-out infinite;
}

.tag-float[data-delay="0"] { animation-delay: 0s; }
.tag-float[data-delay="1"] { animation-delay: 0.8s; }
.tag-float[data-delay="2"] { animation-delay: 1.6s; }
.tag-float[data-delay="3"] { animation-delay: 2.4s; }
.tag-float[data-delay="4"] { animation-delay: 3.2s; }
.tag-float[data-delay="5"] { animation-delay: 4s; }
.tag-float[data-delay="6"] { animation-delay: 4.8s; }

/* ── Scroll reveal (AOS-like) ── */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos-delay="400"] { transition-delay: 0.4s; }

/* ── Page load animation ── */
.hero-content {
  animation: fade-in-up 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

.hero-tags {
  animation: fade-in-up 1s cubic-bezier(0.16, 1, 0.3, 1) 0.5s both;
}

.hero-title {
  animation: fade-in-scale 1s cubic-bezier(0.16, 1, 0.3, 1) 0.7s both;
}

.hero-subtitle {
  animation: fade-in-up 1s cubic-bezier(0.16, 1, 0.3, 1) 0.9s both;
}

.hero-desc {
  animation: fade-in-up 1s cubic-bezier(0.16, 1, 0.3, 1) 1.1s both;
}

.scroll-hint {
  animation: fade-in-up 1s cubic-bezier(0.16, 1, 0.3, 1) 1.3s both;
}

/* ── Hover micro-interactions ── */
.timeline-card,
.work-card,
.ai-card,
.contact-card {
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Card shimmer effect ── */
.work-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.05),
    transparent
  );
  transition: left 0.6s ease;
  pointer-events: none;
  z-index: 1;
}

.work-card:hover::before {
  left: 100%;
}

/* ── Navbar scroll transition ── */
.navbar {
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Gradient text shimmer ── */
.hero-title {
  background-size: 200% auto;
  animation: shimmer 4s linear infinite, fade-in-scale 1s cubic-bezier(0.16, 1, 0.3, 1) 0.7s both;
}

/* ── Pulse glow for active elements ── */
.hero-badge {
  animation: pulse-glow 3s ease-in-out infinite;
}

/* ── Smooth section transitions ── */
.section {
  opacity: 1;
  transition: opacity 0.6s ease;
}

/* ── Grid background pattern (subtle) ── */
.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0;
  animation: grid-pulse 8s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

.section > .container {
  position: relative;
  z-index: 1;
}

/* ── Tag cloud drift ── */
.hero-tags .tag {
  position: relative;
}

.hero-tags .tag::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: var(--gradient-accent);
  opacity: 0;
  z-index: -1;
  transition: opacity 0.3s ease;
  filter: blur(8px);
}

.hero-tags .tag:hover::after {
  opacity: 0.15;
}

/* ── Loading state ── */
body.loading {
  overflow: hidden;
}

body.loading .hero-content,
body.loading .hero-tags {
  opacity: 0;
}

/* ── Selection style ── */
::selection {
  background: var(--accent-soft);
  color: var(--accent);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-soft);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ── Focus styles ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

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

  .tag-float {
    animation: none !important;
  }

  .hero-title {
    animation: none !important;
    opacity: 1;
    transform: none;
  }
}