/* ============================================================
   ANIMATIONS — Scroll reveal, micro-interactions
   ============================================================ */

/* ── Reveal base states (set by JS via IntersectionObserver) ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

[data-reveal="left"] {
  opacity: 0;
  transform: translateX(-36px);
}

[data-reveal="right"] {
  opacity: 0;
  transform: translateX(36px);
}

[data-reveal="scale"] {
  opacity: 0;
  transform: scale(0.96);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* ── Stagger delays ── */
[data-delay="100"] { transition-delay: 0.1s; }
[data-delay="200"] { transition-delay: 0.2s; }
[data-delay="300"] { transition-delay: 0.3s; }
[data-delay="400"] { transition-delay: 0.4s; }
[data-delay="500"] { transition-delay: 0.5s; }
[data-delay="600"] { transition-delay: 0.6s; }
[data-delay="700"] { transition-delay: 0.7s; }
[data-delay="800"] { transition-delay: 0.8s; }

/* ── Fade in up keyframe ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}

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

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Counter number count-up animation ── */
@keyframes countUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Skill bar fill animation ── */
@keyframes fillBar {
  from { width: 0; }
}

/* ── Timeline line draw ── */
@keyframes drawLine {
  from { height: 0; }
  to   { height: 100%; }
}

/* ── Pulse dot (online indicator) ── */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.3); }
}

/* ── Shimmer loading ── */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-surface) 25%,
    var(--color-surface-3) 50%,
    var(--color-surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s infinite;
}

/* ── Hover lift ── */
.hover-lift {
  transition: transform var(--t-base), box-shadow var(--t-base);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ── Underline hover ── */
.hover-underline {
  position: relative;
}
.hover-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--t-base);
}
.hover-underline:hover::after { width: 100%; }

/* ── Arrow bounce ── */
@keyframes arrowBounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(5px); }
}

.animate-bounce { animation: arrowBounce 2s ease-in-out infinite; }