/* ═══════════════════════════════════════════════════
   ANIMATIONS — Keyframes, Scroll Reveal, Micro-interactions
   ═══════════════════════════════════════════════════ */

/* ── Scroll Reveal Base ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.reveal[style*="--i"] {
  transition-delay: calc(var(--i) * 120ms);
}

/* Direction variants */
.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right[style*="--i"] {
  transition-delay: calc(var(--i) * 150ms);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-left[style*="--i"] {
  transition-delay: calc(var(--i) * 150ms);
}

/* ── Keyframes ── */
@keyframes float-glow {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.3;
  }
  25% {
    transform: translate(20px, -30px) scale(1.1);
    opacity: 0.45;
  }
  50% {
    transform: translate(-10px, -50px) scale(1.05);
    opacity: 0.35;
  }
  75% {
    transform: translate(-30px, -20px) scale(0.95);
    opacity: 0.4;
  }
}

@keyframes pulse-dot {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(34, 197, 94, 0);
  }
}

@keyframes scroll-down {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

@keyframes fade-bounce {
  0%, 100% {
    opacity: 0.4;
    transform: translateX(-50%) translateY(0);
  }
  50% {
    opacity: 0.8;
    transform: translateX(-50%) translateY(8px);
  }
}

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

/* ── Skill card 3D tilt (applied via JS) ── */
.skill-card.tilting {
  transition: none;
}

/* ── Project transition ── */
.project-showcase.transitioning .project-visual,
.project-showcase.transitioning .project-info {
  opacity: 0;
  transform: translateY(15px);
}

.project-visual,
.project-info {
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

/* ── Nav link hover underline ── */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  right: var(--space-md);
  left: var(--space-md);
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active::after {
  display: none;
}

/* ── Button ripple effect ── */
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 70%);
  opacity: 0;
  transform: scale(0);
  transition: all 0.5s var(--ease-out);
}

.btn-primary:active::after {
  opacity: 1;
  transform: scale(2.5);
  transition: 0s;
}

/* ── Timeline dot pulse ── */
.timeline-dot {
  animation: pulse-timeline 3s ease-in-out infinite;
}

@keyframes pulse-timeline {
  0%, 100% {
    box-shadow: 0 0 10px var(--primary-glow);
  }
  50% {
    box-shadow: 0 0 25px var(--primary-glow);
  }
}

/* ── Cert card shine ── */
.cert-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(255,255,255,0.03) 40%,
    rgba(255,255,255,0.06) 50%,
    rgba(255,255,255,0.03) 60%,
    transparent 100%
  );
  background-size: 200% 200%;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
  border-radius: inherit;
  pointer-events: none;
}

.cert-card:hover::after {
  opacity: 1;
  animation: shimmer 1.5s ease infinite;
}

/* ── Form focus glow ── */
.form-group input:focus,
.form-group textarea:focus {
  box-shadow: 0 4px 15px rgba(122, 16, 34, 0.08);
}