/* ============================================
   SAMURAI Design System — Animations
   ============================================ */

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

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

@keyframes katanaSlash {
  0% {
    transform: scaleX(0);
    transform-origin: left;
    opacity: 0;
  }
  50% {
    transform: scaleX(1);
    transform-origin: left;
    opacity: 1;
  }
  100% {
    transform: scaleX(1);
    transform-origin: left;
    opacity: 1;
  }
}

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(220, 38, 38, 0.1);
  }
  50% {
    box-shadow: 0 0 40px rgba(220, 38, 38, 0.2);
  }
}

@keyframes borderGlow {
  0%, 100% {
    border-color: rgba(220, 38, 38, 0.15);
  }
  50% {
    border-color: rgba(220, 38, 38, 0.35);
  }
}

/* ── Stagger delays ── */
.stagger-1 { animation-delay: 0s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.2s; }
.stagger-4 { animation-delay: 0.3s; }
.stagger-5 { animation-delay: 0.4s; }
.stagger-6 { animation-delay: 0.5s; }

/* ── Intersection Observer triggers ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ── Hover micro-interactions ── */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.hover-glow {
  transition: box-shadow var(--transition-slow);
}

.hover-glow:hover {
  box-shadow: 0 0 30px rgba(220, 38, 38, 0.15);
}