/* ==============================================
   HabitGuild Landing Page — Animations
   Scroll reveals, particles, keyframes
   ============================================== */

/* --- Keyframes --- */

@keyframes bounce-arrow {
  0%, 20%, 50%, 80%, 100% {
    transform: rotate(45deg) translateY(0);
  }
  40% {
    transform: rotate(45deg) translateY(8px);
  }
  60% {
    transform: rotate(45deg) translateY(4px);
  }
}

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

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

@keyframes float-particle {
  0% {
    transform: translateY(0) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100vh) translateX(20px);
    opacity: 0;
  }
}

@keyframes glow-pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(212, 168, 85, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(212, 168, 85, 0.5);
  }
}

/* --- Scroll Reveal Base --- */

.reveal {
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Fade Up */
.reveal--fade-up {
  transform: translateY(30px);
}

/* Slide Left */
.reveal--slide-left {
  transform: translateX(-40px);
}

/* Slide Right */
.reveal--slide-right {
  transform: translateX(40px);
}

/* Timeline step */
.reveal--timeline {
  transform: translateY(20px) scale(0.95);
}

/* Grow (for connectors) */
.reveal--grow {
  transform: scaleY(0);
  transform-origin: top;
}

/* Stagger delays (applied via JS) */
.reveal--stagger {
  transform: translateY(20px);
}

/* Delay modifiers (for hero sequence) */
.reveal--delay-1 {
  transition-delay: 0.15s;
}

.reveal--delay-2 {
  transition-delay: 0.3s;
}

.reveal--delay-3 {
  transition-delay: 0.45s;
}

.reveal--delay-4 {
  transition-delay: 0.6s;
}

/* --- CSS Particles (ember/sparkle) --- */

.particle {
  position: absolute;
  bottom: -10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-gold);
  animation: float-particle linear infinite;
  pointer-events: none;
}

.particle--ember {
  background: var(--accent-fire);
  box-shadow: 0 0 6px var(--accent-fire);
}

.particle--sparkle {
  background: var(--accent-gold-light);
  box-shadow: 0 0 8px var(--accent-gold-light);
  width: 3px;
  height: 3px;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .particle,
  .scroll-arrow,
  .phone-frame__hint {
    animation: none;
  }

  .btn__loader {
    animation: none;
  }
}