/* ==============================
   ANIMATIONS — css/animations.css
   ============================== */

/* ── Keyframes ── */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}

@keyframes scrollPulse {
  0%   { opacity: 0; transform: scaleY(0); transform-origin: top; }
  40%  { opacity: 1; transform: scaleY(1); transform-origin: top; }
  70%  { opacity: 1; transform: scaleY(1); transform-origin: bottom; }
  100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

/* ── Reveal on scroll ── */
.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ── Hero load animations (fire immediately) ── */
.hero .reveal-up {
  animation: fadeUp 0.8s var(--ease) forwards;
  opacity: 0;
}

.hero .reveal-up.delay-1 { animation-delay: 0.15s; }
.hero .reveal-up.delay-2 { animation-delay: 0.28s; }
.hero .reveal-up.delay-3 { animation-delay: 0.40s; }
.hero .reveal-up.delay-4 { animation-delay: 0.52s; }
.hero .reveal-up.delay-5 { animation-delay: 0.65s; }

/* Override for hero: once animated, stay visible */
.hero .reveal-up.visible { opacity: 1; transform: none; }

/* ── Stat counter shimmer ── */
.stat-num {
  background: linear-gradient(
    90deg,
    var(--accent) 0%,
    var(--accent-2) 40%,
    var(--accent) 80%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

/* ── Page load fade ── */
body {
  animation: fadeIn 0.4s ease forwards;
}

/* ── Hover glow on cards ── */
.project-card,
.skill-card,
.edu-card,
.timeline-card {
  will-change: transform;
}

/* ── Nav link underline ── */
.nav-link::after {
  transition: width 0.3s var(--ease);
}

/* ── Hamburger animation ── */
.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile menu slide-in ── */
.nav-links {
  transition: transform 0.4s var(--ease), opacity 0.3s;
}