/* ==========================================================================
   AlgoHub SMC - Animations
   File: animations.css
   ========================================================================== */

/* --- Scroll Reveal Classes --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }
.delay-500 { transition-delay: 500ms; }

/* --- Keyframes --- */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* --- Utility Animations --- */
.animate-pulse-btn {
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(6, 182, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
}

/* Skeleton Loading (Dark Theme) */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.skeleton {
  background: var(--bg-surface-elevated);
  background-image: linear-gradient(to right, var(--bg-surface-elevated) 0%, rgba(255,255,255,0.05) 20%, var(--bg-surface-elevated) 40%, var(--bg-surface-elevated) 100%);
  background-repeat: no-repeat;
  background-size: 1000px 100%; 
  animation-duration: 1.5s;
  animation-fill-mode: forwards; 
  animation-iteration-count: infinite;
  animation-name: shimmer;
  animation-timing-function: linear;
}

/* --- Image & Card Hover Animations --- */
.hover-zoom:hover { transform: scale(1.05); }
.transition-transform { transition: transform 0.5s ease; }