/**
 * Animations & Keyframe Stylesheet
 * Chamika Sandeepa Ranasinha (CHAMI-csr) Portfolio
 */

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes rotateClockwise {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes rotateCounterClockwise {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(-360deg); }
}

@keyframes pulseGlow {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(0, 255, 157, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(0, 255, 157, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(0, 255, 157, 0);
  }
}

@keyframes floatUpDown {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-12px);
  }
}

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scanline {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(1000%);
  }
}

@keyframes neonFlicker {
  0%, 19.999%, 22%, 62.999%, 64%, 64.999%, 70%, 100% {
    opacity: 1;
    text-shadow: 0 0 10px var(--accent-cyan), 0 0 20px var(--accent-cyan);
  }
  20%, 21.999%, 63%, 63.999%, 65%, 69.999% {
    opacity: 0.4;
    text-shadow: none;
  }
}

/* Reveal classes handled by IntersectionObserver */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }
.reveal-delay-4 { transition-delay: 0.6s; }

/* Interactive Hover Glitch effect for tech titles */
.glitch-hover:hover {
  animation: neonFlicker 1.5s infinite;
}

/* Glowing border animation */
.glow-border-anim {
  position: relative;
}

.glow-border-anim::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-green), var(--accent-cyan));
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: gradientShift 6s linear infinite;
  pointer-events: none;
}