/* ================================================================
   KEYFRAMES
   ================================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-22px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes sineScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes nodeGlow {
  0%, 100% { box-shadow: 0 0 6px rgba(74,158,255,.4); }
  50%       { box-shadow: 0 0 18px rgba(74,158,255,.85); }
}

@keyframes borderGlow {
  0%, 100% { box-shadow: 0 0 6px rgba(74,158,255,.15); }
  50%       { box-shadow: 0 0 20px rgba(74,158,255,.4); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* ================================================================
   SCROLL REVEAL  (set by IntersectionObserver in animations.js)
   ================================================================ */
[data-animate] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}
[data-animate="fade"] { transform: none; }
[data-animate="fade"].animated { transform: none; }

[data-animate="slide-left"] { transform: translateX(-22px); }
[data-animate="slide-left"].animated { transform: translateX(0); }

/* Stagger delays */
[data-delay="100"] { transition-delay: 0.1s; }
[data-delay="150"] { transition-delay: 0.15s; }
[data-delay="200"] { transition-delay: 0.2s; }
[data-delay="250"] { transition-delay: 0.25s; }
[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; }

/* ================================================================
   PAGE LOAD UTILITY CLASSES
   ================================================================ */
.anim-fade-up  { animation: fadeInUp  0.6s ease both; }
.anim-fade     { animation: fadeIn    0.6s ease both; }
.anim-slide-left { animation: slideInLeft 0.6s ease both; }

/* ================================================================
   CURSOR / TYPEWRITER
   ================================================================ */
.cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--color-accent-blue);
  margin-left: 3px;
  vertical-align: middle;
  border-radius: 1px;
  animation: cursorBlink 1s step-end infinite;
}

/* ================================================================
   SINE WAVE
   ================================================================ */
.wave-path {
  animation: sineScroll 14s linear infinite;
}
.wave-path--slow {
  animation-duration: 20s;
  animation-direction: reverse;
}