/* ============================================================
   animations.css
   CrossFit Indefinite — motion system.
   Reveal · Fade · Slide · Glow · Hover · Loading · Parallax
   Depends on: variables.css
   ============================================================ */

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-48px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(48px); }
  to   { opacity: 1; transform: translateX(0); }
}

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

@keyframes blurIn {
  from { opacity: 0; filter: blur(14px); }
  to   { opacity: 1; filter: blur(0); }
}

/* Electric blue pulsing glow */
@keyframes bluePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 168, 255, 0.45); }
  50%      { box-shadow: 0 0 26px 6px rgba(0, 168, 255, 0.25); }
}

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

@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

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

/* Animated brand gradient (buttons, banners, handle) */
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Rising particle field in the hero */
@keyframes floatUp {
  0%   { transform: translateY(0) translateX(0); opacity: 0; }
  10%  { opacity: 0.5; }
  90%  { opacity: 0.4; }
  100% { transform: translateY(-110vh) translateX(20px); opacity: 0; }
}

/* Soft page-content reveal (per navigation) */
@keyframes pageReveal {
  from { opacity: 0; transform: translateY(12px); filter: blur(4px); }
  to   { opacity: 1; transform: none; filter: blur(0); }
}

@keyframes scrollHint {
  0%   { opacity: 0; transform: translateY(-6px); }
  50%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(6px); }
}

/* ---------------------------------------------------------
   Scroll-reveal system (toggled by animations.js via
   IntersectionObserver adding .is-visible)
--------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transition: opacity var(--speed-slow) var(--ease-out),
              transform var(--speed-slow) var(--ease-out),
              filter var(--speed-slow) var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal="up"]    { transform: translateY(40px); }
[data-reveal="down"]  { transform: translateY(-40px); }
[data-reveal="left"]  { transform: translateX(-48px); }
[data-reveal="right"] { transform: translateX(48px); }
[data-reveal="zoom"]  { transform: scale(0.92); }
[data-reveal="blur"]  { filter: blur(14px); }

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  filter: none;
}

/* Stagger children via inline --delay or nth-child */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--speed-slow) var(--ease-out),
              transform var(--speed-slow) var(--ease-out);
}
[data-reveal-stagger].is-visible > * {
  opacity: 1;
  transform: none;
}
[data-reveal-stagger].is-visible > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal-stagger].is-visible > *:nth-child(2) { transition-delay: 0.12s; }
[data-reveal-stagger].is-visible > *:nth-child(3) { transition-delay: 0.19s; }
[data-reveal-stagger].is-visible > *:nth-child(4) { transition-delay: 0.26s; }
[data-reveal-stagger].is-visible > *:nth-child(5) { transition-delay: 0.33s; }
[data-reveal-stagger].is-visible > *:nth-child(6) { transition-delay: 0.40s; }

/* ---------------------------------------------------------
   Utility animation classes
--------------------------------------------------------- */
.anim-fade      { animation: fadeIn var(--speed-slow) var(--ease-out) both; }
.anim-fade-up   { animation: fadeInUp var(--speed-slow) var(--ease-out) both; }
.anim-fade-down { animation: fadeInDown var(--speed-slow) var(--ease-out) both; }
.anim-slide-l   { animation: slideInLeft var(--speed-slow) var(--ease-out) both; }
.anim-slide-r   { animation: slideInRight var(--speed-slow) var(--ease-out) both; }
.anim-zoom      { animation: zoomIn var(--speed-slow) var(--ease-out) both; }
.anim-blur      { animation: blurIn var(--speed-slower) var(--ease-out) both; }
.anim-float     { animation: floaty 4s var(--ease-standard) infinite; }
.anim-glow      { animation: bluePulse 2.4s var(--ease-standard) infinite; }

/* ---------------------------------------------------------
   Hover interactions
--------------------------------------------------------- */
.hover-lift { transition: transform var(--speed-base) var(--ease-standard); }
.hover-lift:hover { transform: translateY(-6px); }

.hover-glow { transition: box-shadow var(--speed-base) var(--ease-standard); }
.hover-glow:hover { box-shadow: var(--shadow-glow); }

.hover-zoom { overflow: hidden; }
.hover-zoom img { transition: transform var(--speed-slow) var(--ease-standard); }
.hover-zoom:hover img { transform: scale(1.06); }

/* Underline sweep */
.link-sweep { position: relative; }
.link-sweep::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 0; height: 2px;
  background: var(--gradient-brand);
  transition: width var(--speed-base) var(--ease-out);
}
.link-sweep:hover::after { width: 100%; }

/* ---------------------------------------------------------
   Loading states
--------------------------------------------------------- */
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.skeleton {
  background: linear-gradient(90deg,
    var(--color-graphite-2) 25%,
    var(--color-gray-900) 37%,
    var(--color-graphite-2) 63%);
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite linear;
  border-radius: var(--radius-sm);
}

/* Scroll hint indicator (hero) */
.scroll-hint {
  width: 24px; height: 40px;
  border: 2px solid var(--color-gray-500);
  border-radius: var(--radius-pill);
  position: relative;
}
.scroll-hint::before {
  content: "";
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  border-radius: 2px;
  background: var(--color-primary);
  animation: scrollHint 1.6s var(--ease-standard) infinite;
}

/* ---------------------------------------------------------
   Parallax (transform driven by animations.js)
--------------------------------------------------------- */
[data-parallax] { will-change: transform; }

/* ---------------------------------------------------------
   Page load fade
--------------------------------------------------------- */
body { animation: fadeIn var(--speed-base) var(--ease-out) both; }

/* ---------------------------------------------------------
   Respect user motion preferences
--------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal],
  [data-reveal-stagger] > * { opacity: 1 !important; transform: none !important; filter: none !important; }
}