/* =============================================================
   animations.css — All transitions, keyframes, scroll-reveal
   ============================================================= */

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

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

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slide-in-right {
  from {
    opacity: 0;
    transform: translateX(24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes line-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* ── Scroll-reveal base state ────────────────────────────── */
/* Applied via JS: add .reveal class to elements to opt-in */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children delay variants */
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
.reveal-delay-5 { transition-delay: 400ms; }

/* Alternate reveal direction for right column */
.reveal--right {
  transform: translateX(24px);
}

.reveal--right.is-visible {
  transform: translateX(0);
}

/* ── Hero entrance animation (runs on page load) ─────────── */
.hero-layout {
  animation: fade-in var(--duration-slow) var(--ease-out) both;
}

.hero-greeting {
  animation: fade-up var(--duration-slow) var(--ease-out) 100ms both;
}

.hero-name {
  animation: fade-up var(--duration-slow) var(--ease-out) 200ms both;
}

.hero-tagline {
  animation: fade-up var(--duration-slow) var(--ease-out) 300ms both;
}

.hero-bio {
  animation: fade-up var(--duration-slow) var(--ease-out) 380ms both;
}

.hero-links {
  animation: fade-up var(--duration-slow) var(--ease-out) 460ms both;
}

.terminal {
  animation: slide-in-right var(--duration-reveal) var(--ease-out) 300ms both;
}

/* ── Nav underline animation ─────────────────────────────── */
.nav__link::after {
  transform-origin: left center;
  transition: transform var(--duration-base) var(--ease-out);
}

/* ── Skill card stagger ──────────────────────────────────── */
.skill-card:nth-child(1) { transition-delay: 0ms; }
.skill-card:nth-child(2) { transition-delay: 60ms; }
.skill-card:nth-child(3) { transition-delay: 120ms; }
.skill-card:nth-child(4) { transition-delay: 180ms; }

/* ── Project card stagger ────────────────────────────────── */
.project-card:nth-child(1) { transition-delay: 0ms; }
.project-card:nth-child(2) { transition-delay: 80ms; }
.project-card:nth-child(3) { transition-delay: 160ms; }
.project-card:nth-child(4) { transition-delay: 240ms; }

/* ── Contact row sweep animation ─────────────────────────── */
/* Already handled by ::before pseudo-element in components.css */

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html { scroll-behavior: auto; }
}