/* ===========================================
   LAWCIAL — Animation System
   Inspired by Griflan's CSS-first approach
   =========================================== */

/* Scroll-triggered reveal — base state (hidden) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-expo),
              transform var(--duration-slow) var(--ease-expo);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays for child elements */
.reveal-stagger > * { opacity: 0; transform: translateY(20px); }
.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-expo),
              transform var(--duration-slow) var(--ease-expo);
}
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.4s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.5s; }

/* Reveal from left */
.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--duration-slow) var(--ease-expo),
              transform var(--duration-slow) var(--ease-expo);
}
.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Reveal from right */
.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--duration-slow) var(--ease-expo),
              transform var(--duration-slow) var(--ease-expo);
}
.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale reveal */
.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--duration-slow) var(--ease-expo),
              transform var(--duration-slow) var(--ease-expo);
}
.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Hero entrance animation */
.hero-enter {
  opacity: 0;
  transform: translateY(40px);
  animation: heroFadeIn var(--duration-hero) var(--ease-expo) forwards;
}

.hero-enter--delay-1 { animation-delay: 0.15s; }
.hero-enter--delay-2 { animation-delay: 0.3s; }
.hero-enter--delay-3 { animation-delay: 0.45s; }

@keyframes heroFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Underline reveal (Griflan style) */
.underline-reveal {
  position: relative;
  display: inline-block;
}

.underline-reveal::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-expo);
}

.underline-reveal:hover::after {
  transform: scaleX(1);
}

/* Button hover effects */
.btn-hover {
  transition: background-color var(--duration-fast) var(--ease-expo),
              color var(--duration-fast) var(--ease-expo),
              transform var(--duration-fast) var(--ease-expo),
              box-shadow var(--duration-fast) var(--ease-expo);
}

.btn-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-hover:active {
  transform: translateY(0);
}

/* Card hover */
.card-hover {
  transition: transform var(--duration-base) var(--ease-expo),
              box-shadow var(--duration-base) var(--ease-expo);
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* Colour shift on hover (Griflan style) */
.hover-blue {
  transition: color var(--duration-fast) var(--ease-expo);
}
.hover-blue:hover {
  color: var(--blue);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale,
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
  }

  .hero-enter {
    opacity: 1;
    transform: none;
    animation: none;
  }
}