/* =========================================
   Solar Udayan Energy - Animations
   ========================================= */

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

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

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

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

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

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

@keyframes bounceIn {
  0% { transform: scale(0.3); opacity: 0; }
  50% { transform: scale(1.05); }
  70% { transform: scale(0.9); }
  100% { transform: scale(1); opacity: 1; }
}

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

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero entry animation */
.hero-animate .hero-title {
  animation: slideUp 0.8s ease forwards;
}
.hero-animate .hero-subtitle {
  animation: slideUp 0.8s ease 0.15s both;
}
.hero-animate .hero-buttons {
  animation: slideUp 0.8s ease 0.3s both;
}
.hero-animate .hero-visual {
  animation: slideLeft 0.8s ease 0.2s both;
}

/* Page hero animations */
.page-hero .page-hero-content {
  animation: slideUp 0.7s ease forwards;
}

/* Counter animation class (controlled by JS) */
.counter-started {
  animation: countUp 0.5s ease forwards;
}

/* Card hover lift (also in style.css via .card-hover) */
.card-hover {
  will-change: transform;
}

/* Solar icon float animation (decorative) */
.icon-float {
  animation: float 3s ease-in-out infinite;
}

/* Scroll reveal classes (added by IntersectionObserver in main.js) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal.delay-100 { transition-delay: 0.1s; }
.reveal.delay-200 { transition-delay: 0.2s; }
.reveal.delay-300 { transition-delay: 0.3s; }
.reveal.delay-400 { transition-delay: 0.4s; }
.reveal.delay-500 { transition-delay: 0.5s; }

/* Shine effect on CTA button */
.btn-shine {
  position: relative;
  overflow: hidden;
}
.btn-shine::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}
.btn-shine:hover::after { left: 150%; }

/* Loading spinner (used during form submit) */
.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 0.5rem;
}

/* Stagger children animation */
.stagger-children > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.6s; }

/* Accordion answer slide */
.faq-answer {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding-top: 0;
  padding-bottom: 0;
  display: block !important; /* override display:none, use max-height instead */
}
.faq-answer.open {
  max-height: 20rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

/* Smooth scroll indicator (optional hero decoration) */
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.5; }
}
.scroll-indicator {
  animation: scrollBounce 1.5s ease infinite;
}

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