/* ============================================================
   Expense Tracker: Budget & Spend — Animations
   ============================================================ */

/* ----- Keyframes ----- */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-down {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-12px);
  }
}

@keyframes glow-pulse {
  0% {
    opacity: 0.6;
    transform: translateX(-50%) scale(1);
  }
  100% {
    opacity: 1;
    transform: translateX(-50%) scale(1.1);
  }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@keyframes shimmer {
  0% {
    background-position: -200% center;
  }
  100% {
    background-position: 200% center;
  }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes count-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* ----- Scroll Reveal Utility Classes ----- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.8s cubic-bezier(0.34, 1.56, 0.64, 1),
              transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ----- Feature Card stagger ----- */
.features-grid .feature-card {
  opacity: 0;
  transform: translateY(24px);
}

.features-grid .feature-card.visible {
  animation: fade-in-up 0.6s ease forwards;
}

.features-grid .feature-card.visible:nth-child(1) { animation-delay: 0s; }
.features-grid .feature-card.visible:nth-child(2) { animation-delay: 0.08s; }
.features-grid .feature-card.visible:nth-child(3) { animation-delay: 0.16s; }
.features-grid .feature-card.visible:nth-child(4) { animation-delay: 0.24s; }
.features-grid .feature-card.visible:nth-child(5) { animation-delay: 0.32s; }
.features-grid .feature-card.visible:nth-child(6) { animation-delay: 0.4s; }
.features-grid .feature-card.visible:nth-child(7) { animation-delay: 0.48s; }
.features-grid .feature-card.visible:nth-child(8) { animation-delay: 0.56s; }
.features-grid .feature-card.visible:nth-child(9) { animation-delay: 0.64s; }

/* ----- Steps stagger ----- */
.how-steps .step {
  opacity: 0;
  transform: translateY(24px);
}

.how-steps .step.visible {
  animation: fade-in-up 0.6s ease forwards;
}

.how-steps .step.visible:nth-child(1) { animation-delay: 0s; }
.how-steps .step.visible:nth-child(2) { animation-delay: 0.15s; }
.how-steps .step.visible:nth-child(3) { animation-delay: 0.3s; }
.how-steps .step.visible:nth-child(4) { animation-delay: 0.45s; }

/* ----- Button hover ripple effect ----- */
.btn-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transform: scale(0);
  animation: ripple-effect 0.6s linear;
  pointer-events: none;
}

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

/* ----- Counter animation ----- */
.counter-value {
  display: inline-block;
}

/* ----- Image lazy load blur-up ----- */
.lazy-image {
  filter: blur(20px);
  transition: filter 0.5s ease;
}

.lazy-image.loaded {
  filter: blur(0);
}

/* ----- Parallax utility ----- */
.parallax {
  will-change: transform;
}