/* ============================================================
   ANIMATIONS & TRANSITIONS - ShopifyChamps
   Scroll animations, hover effects, component transitions,
   progress bar, loading spinner, and reduced motion overrides
   ============================================================ */

/* ------------------------------------------------------------
   Scroll Reveal Base
   Elements with .animate-on-scroll start hidden and slide up
   when the .is-visible class is added via IntersectionObserver.

   No-JS fallback: A CSS-only animation ensures elements become
   visible after 1.5s even if JavaScript never runs, so content
   is never permanently hidden.
   ------------------------------------------------------------ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  animation: noJsFallbackReveal 0s ease forwards 1.5s;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
  animation: none;
}

/* -- Animation Variants -- */

/* Fade in only (no vertical movement) */
.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
  animation: noJsFallbackReveal 0s ease forwards 1.5s;
}

.fade-in.is-visible {
  opacity: 1;
  animation: none;
}

/* Slide up (same as default, explicit class) */
.slide-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  animation: noJsFallbackReveal 0s ease forwards 1.5s;
}

.slide-up.is-visible {
  opacity: 1;
  transform: translateY(0);
  animation: none;
}

/* Slide in from left */
.slide-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  animation: noJsFallbackReveal 0s ease forwards 1.5s;
}

.slide-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
  animation: none;
}

/* Slide in from right */
.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  animation: noJsFallbackReveal 0s ease forwards 1.5s;
}

.slide-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
  animation: none;
}

/* No-JS fallback: reveal elements after 1.5s delay */
@keyframes noJsFallbackReveal {
  to {
    opacity: 1;
    transform: translateY(0) translateX(0);
  }
}

/* ------------------------------------------------------------
   Stagger Delays
   Children inside .stagger containers get incremental delays
   ------------------------------------------------------------ */
.stagger > *:nth-child(1) { transition-delay: 0s; }
.stagger > *:nth-child(2) { transition-delay: 0.1s; }
.stagger > *:nth-child(3) { transition-delay: 0.2s; }
.stagger > *:nth-child(4) { transition-delay: 0.3s; }
.stagger > *:nth-child(5) { transition-delay: 0.4s; }
.stagger > *:nth-child(6) { transition-delay: 0.5s; }

/* Also support .animate-on-scroll.stagger pattern */
.animate-on-scroll.stagger > *:nth-child(1) { transition-delay: 0s; }
.animate-on-scroll.stagger > *:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll.stagger > *:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll.stagger > *:nth-child(4) { transition-delay: 0.3s; }
.animate-on-scroll.stagger > *:nth-child(5) { transition-delay: 0.4s; }
.animate-on-scroll.stagger > *:nth-child(6) { transition-delay: 0.5s; }

/* ------------------------------------------------------------
   Hover Effects - Buttons
   Scale up + enhanced shadow on hover
   ------------------------------------------------------------ */
.btn {
  transition:
    transform var(--transition-default),
    box-shadow var(--transition-default),
    background-color var(--transition-default),
    border-color var(--transition-default),
    color var(--transition-default);
}

/* ------------------------------------------------------------
   Hover Effects - Cards
   Lift up on hover
   ------------------------------------------------------------ */
.card {
  transition:
    transform var(--transition-default),
    box-shadow var(--transition-default);
}

/* ------------------------------------------------------------
   Hover Effects - Images in overflow:hidden containers
   Scale on hover for zoom-in effect
   ------------------------------------------------------------ */
.card--portfolio .card__image-wrapper {
  overflow: hidden;
}

.card--portfolio .card__image {
  transition: transform var(--transition-slow);
}

.card--portfolio:hover .card__image {
  transform: scale(1.05);
}

/* Generic image hover zoom within overflow:hidden parent */
.overflow-hidden img {
  transition: transform var(--transition-slow);
}

.overflow-hidden:hover img {
  transform: scale(1.05);
}

/* ------------------------------------------------------------
   Hover Effects - Link Underline Slide-in from Left
   ------------------------------------------------------------ */
.nav__link,
.footer__link,
.card__link {
  position: relative;
}

.nav__link::after,
.card__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-default);
}

.nav__link:hover::after,
.nav__link--active::after,
.card__link:hover::after {
  width: 100%;
}

/* ------------------------------------------------------------
   Hover Effects - Service Icons
   Subtle color shift on parent hover (defined in components.css
   already; reinforced here for completeness)
   ------------------------------------------------------------ */
.card--service .card__icon {
  transition:
    background-color var(--transition-default),
    color var(--transition-default),
    transform var(--transition-default);
}

.card--service:hover .card__icon {
  transform: scale(1.08);
}

/* ------------------------------------------------------------
   Scroll Progress Bar
   A thin bar fixed at the very top of the viewport
   Width is controlled by JS based on scroll percentage
   ------------------------------------------------------------ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background-color: var(--color-primary);
  z-index: 9999;
  transition: none; /* Updated by JS on every frame */
  pointer-events: none;
}

/* ------------------------------------------------------------
   Loading Spinner Keyframes
   Used by .spinner class in components.css and .btn--loading
   ------------------------------------------------------------ */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Button loading state */
.btn--loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin-top: -10px;
  margin-left: -10px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Loading spinner for dark/outlined buttons */
.btn--secondary.btn--loading::after,
.btn--white.btn--loading::after {
  border-color: rgba(var(--color-primary-rgb), 0.3);
  border-top-color: var(--color-primary);
}

/* ------------------------------------------------------------
   Accordion Expand / Collapse Transitions
   Used by FAQ panels with max-height animation.

   Supports two markup patterns:
   1. Main FAQ page: .faq-item / .faq-toggle / .faq-panel / .faq-icon
   2. Service pages: .faq-item / .faq-item__trigger / .faq-item__content / .faq-item__icon
   ------------------------------------------------------------ */

/* --- Pattern 1: Main FAQ page (.faq-toggle / .faq-panel) --- */
.faq-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-panel[aria-hidden="false"] {
  /* max-height is set dynamically by JS */
}

.faq-toggle {
  transition: color var(--transition-default);
}

.faq-toggle[aria-expanded="true"] {
  color: var(--color-primary);
}

/* Rotate chevron icon when expanded */
.faq-toggle[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
}

.faq-icon {
  transition: transform var(--transition-default);
}

/* --- Pattern 2: Service page FAQ (.faq-list / .faq-item__trigger / .faq-item__content) --- */
.faq-list .faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-list .faq-item:last-child {
  border-bottom: none;
}

.faq-item__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-dark);
  text-align: left;
  cursor: pointer;
  background: none;
  border: none;
  transition: color var(--transition-default);
}

.faq-item__trigger[aria-expanded="true"] {
  color: var(--color-primary);
}

.faq-item__question {
  flex: 1;
  padding-right: var(--space-4);
}

.faq-item__icon {
  flex-shrink: 0;
  transition: transform var(--transition-default);
}

.faq-item__trigger[aria-expanded="true"] .faq-item__icon {
  transform: rotate(180deg);
}

.faq-item__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-item__content[aria-hidden="false"] {
  /* max-height is set dynamically by JS */
}

.faq-item__content p {
  padding: 0 0 var(--space-5) 0;
  color: var(--color-gray);
  line-height: var(--leading-relaxed);
}

/* ------------------------------------------------------------
   Testimonial Carousel Transitions
   Smooth sliding between testimonial cards
   ------------------------------------------------------------ */
.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-slide {
  flex: 0 0 100%;
  min-width: 0;
}

/* Carousel dots */
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background-color: transparent;
  cursor: pointer;
  padding: 0;
  transition:
    background-color var(--transition-default),
    border-color var(--transition-default),
    transform var(--transition-default);
}

.carousel-dot:hover {
  border-color: var(--color-primary);
}

.carousel-dot.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  transform: scale(1.15);
}

/* Carousel arrows */
.carousel-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-dark);
  cursor: pointer;
  padding: 0;
  transition:
    background-color var(--transition-default),
    border-color var(--transition-default),
    color var(--transition-default),
    transform var(--transition-default);
}

.carousel-arrow:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.carousel-arrow:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* ------------------------------------------------------------
   Header Scrolled Transition
   Smooth padding and shadow change when scrolling past hero
   (Defined in layout.css; transition reinforced here)
   ------------------------------------------------------------ */
.header {
  transition:
    padding var(--transition-default),
    background-color var(--transition-default),
    box-shadow var(--transition-default);
}

/* ------------------------------------------------------------
   Back to Top Button
   Floating button that appears after scrolling
   ------------------------------------------------------------ */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  z-index: var(--z-sticky);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition:
    opacity var(--transition-default),
    visibility var(--transition-default),
    transform var(--transition-default),
    background-color var(--transition-default);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-3px);
}

.back-to-top:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* ------------------------------------------------------------
   Form Group States (used by JS form validation)
   ------------------------------------------------------------ */
.form-group--focused .form-input,
.form-group--focused .form-textarea,
.form-group--focused .form-select {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.2);
}

.form-group--error .form-input,
.form-group--error .form-textarea,
.form-group--error .form-select {
  border-color: var(--color-error);
}

.form-group--error .form-input:focus,
.form-group--error .form-textarea:focus,
.form-group--error .form-select:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(var(--color-error-rgb), 0.2);
}

.form-group--success .form-input,
.form-group--success .form-textarea,
.form-group--success .form-select {
  border-color: var(--color-success);
}

.form-group--error .form-error {
  display: block;
}

.form-group--success .form-error {
  display: none;
}

/* Form success message slide-down */
.form-success-message {
  display: none;
  padding: var(--space-6);
  background-color: rgba(var(--color-success-rgb), 0.1);
  border: 2px solid var(--color-success);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--color-success);
  font-weight: var(--font-semibold);
  animation: slideDown 0.4s ease forwards;
}

.form-success-message.is-visible {
  display: block;
}

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

/* Form error message (global) */
.form-error-message {
  display: none;
  padding: var(--space-4);
  background-color: rgba(var(--color-error-rgb), 0.1);
  border: 2px solid var(--color-error);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--color-error);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-4);
}

.form-error-message.is-visible {
  display: block;
}

/* ------------------------------------------------------------
   Prefers Reduced Motion
   Disable ALL animations and transitions for users who
   prefer reduced motion. Show elements immediately.
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  /* Remove all scroll animations - show elements immediately */
  .animate-on-scroll,
  .fade-in,
  .slide-up,
  .slide-in-left,
  .slide-in-right {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  /* Disable all transitions and animations globally */
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Stagger delays removed */
  .stagger > *,
  .animate-on-scroll.stagger > * {
    transition-delay: 0s !important;
  }

  /* Cards and buttons - no hover transforms */
  .card:hover,
  .btn:hover {
    transform: none !important;
  }

  /* No image zoom */
  .overflow-hidden:hover img,
  .card--portfolio:hover .card__image {
    transform: none !important;
  }

  /* Carousel - instant transition */
  .carousel-track {
    transition: none !important;
  }

  /* Accordion panels - instant */
  .faq-panel,
  .faq-item__content {
    transition: none !important;
  }

  /* Back to top - no animation */
  .back-to-top {
    transition: none !important;
  }

  .back-to-top.is-visible {
    transform: none !important;
  }

  /* Scroll progress bar still functional, just no smoothing */
  .scroll-progress {
    transition: none !important;
  }
}