/**
 * SEO Quartz - Animations CSS
 */

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

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

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

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

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes zoomIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes slideInLeft {
  from { transform: translateX(-100%); }
  to   { transform: translateX(0); }
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

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

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

@keyframes shimmer {
  from { background-position: -200% 0; }
  to   { background-position: 200% 0; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

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

/* =========================================================
   Utility Animation Classes
========================================================= */
.animate-fade-in     { animation: fadeIn 0.5s ease both; }
.animate-fade-in-up  { animation: fadeInUp 0.5s ease both; }
.animate-fade-in-down { animation: fadeInDown 0.5s ease both; }
.animate-fade-in-left { animation: fadeInLeft 0.5s ease both; }
.animate-fade-in-right { animation: fadeInRight 0.5s ease both; }
.animate-zoom-in     { animation: zoomIn 0.4s ease both; }
.animate-pulse       { animation: pulse 2s ease infinite; }
.animate-spin        { animation: spin 1s linear infinite; }
.animate-bounce      { animation: bounce 1s ease infinite; }

/* Stagger helpers */
.animate-delay-100 { animation-delay: 0.1s; }
.animate-delay-200 { animation-delay: 0.2s; }
.animate-delay-300 { animation-delay: 0.3s; }
.animate-delay-400 { animation-delay: 0.4s; }
.animate-delay-500 { animation-delay: 0.5s; }

/* =========================================================
   Scroll Animations (requires Intersection Observer in JS)
========================================================= */
[data-animate] {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate="fade-up"]    { transform: translateY(30px); }
[data-animate="fade-down"]  { transform: translateY(-30px); }
[data-animate="fade-left"]  { transform: translateX(-30px); }
[data-animate="fade-right"] { transform: translateX(30px); }
[data-animate="zoom-in"]    { transform: scale(0.9); }
[data-animate].animated     { opacity: 1; transform: none; }

/* =========================================================
   Preloader
========================================================= */
.page-preloader {
  position: fixed; inset: 0; background: var(--sq-body-bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 99999; transition: opacity 0.4s ease;
}
.page-preloader.preloader-hidden { opacity: 0; pointer-events: none; }
.preloader-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--sq-border);
  border-top-color: var(--sq-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* =========================================================
   Skeleton Loading
========================================================= */
.skeleton {
  background: linear-gradient(90deg, var(--sq-border) 25%, var(--sq-surface) 50%, var(--sq-border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--sq-radius);
}
.skeleton-text  { height: 1em; margin-bottom: 0.5em; }
.skeleton-title { height: 1.5em; width: 60%; margin-bottom: 0.75em; }
.skeleton-image { height: 200px; }
.skeleton-avatar { width: 48px; height: 48px; border-radius: 50%; }

/* =========================================================
   Transition helpers
========================================================= */
.transition-all    { transition: all var(--sq-transition); }
.transition-colors { transition: color var(--sq-transition), background-color var(--sq-transition), border-color var(--sq-transition); }
.transition-transform { transition: transform var(--sq-transition); }
.transition-opacity { transition: opacity var(--sq-transition); }

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