/* ==========================================================================
   CSS Animations & Transitions
   Subtle, refined — Anthropic-inspired
   ========================================================================== */

/* ---- Keyframes ---- */
@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-5%, -10%); }
  20% { transform: translate(-15%, 5%); }
  30% { transform: translate(7%, -25%); }
  40% { transform: translate(-5%, 25%); }
  50% { transform: translate(-15%, 10%); }
  60% { transform: translate(15%, 0%); }
  70% { transform: translate(0%, 15%); }
  80% { transform: translate(3%, 35%); }
  90% { transform: translate(-10%, 10%); }
}

/* ---- GSAP Initial States ---- */

/* ---- Transition Utilities ---- */
.transition-all {
  transition: all var(--transition-base);
}

.transition-transform {
  transition: transform var(--transition-base);
}

.transition-opacity {
  transition: opacity var(--transition-base);
}

.transition-colors {
  transition: color var(--transition-base),
              background-color var(--transition-base),
              border-color var(--transition-base);
}

/* ---- Hover Lift ---- */
.hover-lift {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.hover-lift:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ---- Underline Animation ---- */
.animated-underline {
  position: relative;
  display: inline-block;
}

.animated-underline::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.animated-underline:hover::after,
.animated-underline.active::after {
  width: 100%;
}

/* ---- Grain Overlay ---- */
.grain-overlay {
  position: absolute;
  top: -150%;
  left: -50%;
  right: -50%;
  bottom: -150%;
  width: 300%;
  height: 400%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.02'/%3E%3C/svg%3E");
  pointer-events: none;
  animation: grain 8s steps(10) infinite;
  opacity: 0.3;
  z-index: 0;
}

/* ---- Reduced Motion ---- */
.reduced-motion *,
.reduced-motion *::before,
.reduced-motion *::after {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
}

.reduced-motion .gsap-reveal {
  visibility: visible !important;
}

.reduced-motion .trust-bar__track {
  animation: none !important;
}