/* ==========================================================================
   Animations — Keyframes / Scroll-Reveal / Micro-interactions
   ========================================================================== */

/* --------------------------------------------------------------------------
   Keyframes
   -------------------------------------------------------------------------- */

/* Fade up — used for initial load & scroll reveals */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade in — simple opacity reveal */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Subtle scale in — for cards */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* CTA button sweep — shimmer from left */
@keyframes btnSweep {
  0%   { transform: translateX(-110%) skewX(-20deg); }
  100% { transform: translateX(220%) skewX(-20deg); }
}

/* Timeline dot pulse */
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(27, 97, 201, 0.4); }
  50%       { box-shadow: 0 0 0 6px rgba(27, 97, 201, 0); }
}

/* Mono blink cursor */
@keyframes blinkCursor {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Hero text stagger — base keyframe */
@keyframes heroReveal {
  from {
    opacity: 0;
    transform: translateY(40px);
    filter: blur(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

/* Horizontal slide line (section-header__line) */
@keyframes lineExpand {
  from { transform: scaleX(0); transform-origin: left; }
  to   { transform: scaleX(1); transform-origin: left; }
}

/* --------------------------------------------------------------------------
   Hero Section — Staggered Entrance
   -------------------------------------------------------------------------- */

.hero-label {
  animation: heroReveal var(--duration-enter) var(--ease-out) 100ms both;
}

.hero-name {
  animation: heroReveal var(--duration-enter) var(--ease-out) 220ms both;
}

.hero-title {
  animation: heroReveal var(--duration-enter) var(--ease-out) 340ms both;
}

.hero-catchphrase {
  animation: heroReveal var(--duration-enter) var(--ease-out) 440ms both;
}

.hero-actions {
  animation: heroReveal var(--duration-enter) var(--ease-out) 560ms both;
}

.hero-meta {
  animation: fadeIn 800ms var(--ease-out) 700ms both;
}

/* --------------------------------------------------------------------------
   Scroll-Reveal — IntersectionObserver classes
   -------------------------------------------------------------------------- */

/* Default state: hidden before reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--duration-enter) var(--ease-out),
    transform var(--duration-enter) var(--ease-out);
}

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

/* Stagger delay variants */
.reveal--delay-1 { transition-delay: 60ms; }
.reveal--delay-2 { transition-delay: 120ms; }
.reveal--delay-3 { transition-delay: 180ms; }
.reveal--delay-4 { transition-delay: 240ms; }

/* Scale variant — for cards */
.reveal--scale {
  opacity: 0;
  transform: translateY(20px) scale(0.97);
  transition:
    opacity var(--duration-enter) var(--ease-out),
    transform var(--duration-enter) var(--ease-out);
}

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

/* --------------------------------------------------------------------------
   Micro-Interactions
   -------------------------------------------------------------------------- */

/* Card hover lift */
.card-lift {
  transition:
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.card-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--theme_shadow-blue-hover);
}

/* Icon color shift on parent hover */
.card-lift:hover .card-icon {
  color: var(--theme_cta);
}

/* Nav link underline slide */
.nav-link::after {
  content: '';
  display: block;
  height: 2px;
  width: 0;
  background-color: var(--theme_cta);
  border-radius: 1px;
  margin-top: 2px;
  transition: width var(--duration-base) var(--ease-out);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}

/* Skill badge check-mark reveal */
.skill-item {
  transition: transform var(--duration-fast) var(--ease-out);
}

.skill-item:hover {
  transform: translateX(4px);
}

/* Project image zoom */
.project-thumb {
  overflow: hidden;
}

.project-thumb img {
  transition: transform 500ms var(--ease-out);
  will-change: transform;
}

.project-card:hover .project-thumb img {
  transform: scale(1.06);
}

/* Timeline dot pulse on visible */
.timeline-dot.is-visible {
  animation: dotPulse 2s ease-in-out infinite;
}

/* Section header line reveal */
.section-header__line {
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 600ms var(--ease-out) 300ms;
}

.section-header.is-visible .section-header__line {
  transform: scaleX(1);
}