/* ==============================
   Scroll Reveal Animations
   ============================== */

.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grids */
.services__grid .card:nth-child(1) { transition-delay: 0ms; }
.services__grid .card:nth-child(2) { transition-delay: 100ms; }
.services__grid .card:nth-child(3) { transition-delay: 200ms; }

.cases__grid .case:nth-child(1) { transition-delay: 0ms; }
.cases__grid .case:nth-child(2) { transition-delay: 100ms; }
.cases__grid .case:nth-child(3) { transition-delay: 200ms; }
.cases__grid .case:nth-child(4) { transition-delay: 300ms; }

.process__grid .process__step:nth-child(1) { transition-delay: 0ms; }
.process__grid .process__step:nth-child(2) { transition-delay: 80ms; }
.process__grid .process__step:nth-child(3) { transition-delay: 160ms; }
.process__grid .process__step:nth-child(4) { transition-delay: 240ms; }

/* ==============================
   Card Hover Glow Effect
   ============================== */

.card {
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-start), var(--accent-end), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.card:hover::before {
  opacity: 1;
}

/* ==============================
   Case Card Hover
   ============================== */

.case {
  position: relative;
  overflow: hidden;
}

.case::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(99, 102, 241, 0.06) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.case:hover::after {
  opacity: 1;
}

/* ==============================
   Button Animations
   ============================== */

.btn {
  position: relative;
  overflow: hidden;
}

.btn--primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn--primary:hover::after {
  opacity: 1;
}

/* Ripple on click */
.btn.ripple::before {
  content: '';
  position: absolute;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: scale(0);
  animation: ripple-effect 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple-effect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ==============================
   Badge Hover
   ============================== */

.badge {
  transition:
    border-color 0.3s ease,
    color 0.3s ease,
    background 0.3s ease,
    transform 0.3s ease;
}

.badge:hover {
  transform: translateY(-2px);
}

/* ==============================
   Process Step Number Pulse
   ============================== */

.process__step:hover .process__number {
  animation: number-pulse 0.5s ease;
}

@keyframes number-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* ==============================
   Nav Link Underline
   ============================== */

.nav__links a:not(.nav__cta) {
  position: relative;
}

.nav__links a:not(.nav__cta)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
  border-radius: 1px;
  transition: width 0.3s ease;
}

.nav__links a:not(.nav__cta):hover::after {
  width: 100%;
}

/* ==============================
   Case Stack Badge Hover
   ============================== */

.case__stack span {
  transition: var(--transition);
}

.case:hover .case__stack span {
  border-color: var(--border-hover);
}

.case__stack span:hover {
  color: var(--text-secondary);
  border-color: var(--accent-start) !important;
  background: var(--accent-glow);
}

/* ==============================
   Hero Grid Animation
   ============================== */

.hero__grid-bg {
  animation: grid-drift 20s ease-in-out infinite;
}

@keyframes grid-drift {
  0%, 100% {
    transform: translateY(0);
    opacity: 0.6;
  }
  50% {
    transform: translateY(-10px);
    opacity: 1;
  }
}

/* ==============================
   Hero Glow Pulse
   ============================== */

.hero__glow {
  animation: glow-pulse 6s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% {
    opacity: 0.6;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateX(-50%) scale(1.05);
  }
}

/* ==============================
   Prefers Reduced Motion
   ============================== */

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

  .fade-up {
    opacity: 1;
    transform: none;
  }
}