/* ==========================================================================
   SAAO — effects.css
   Animations, hover effects, custom cursor, marquee, tilt, gradients
   ========================================================================== */

/* ---------- Keyframes ----------------------------------------------------- */
@keyframes marqueeScroll {
  0%   { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-50%, 0, 0); }
}

@keyframes blob {
  0%, 100% {
    transform: translate3d(0, 0, 0) scale(1);
    border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%;
  }
  33% {
    transform: translate3d(10%, -6%, 0) scale(1.08);
    border-radius: 60% 40% 30% 70% / 55% 40% 60% 45%;
  }
  66% {
    transform: translate3d(-8%, 10%, 0) scale(0.95);
    border-radius: 35% 65% 55% 45% / 40% 55% 45% 60%;
  }
}

@keyframes shine {
  0%   { transform: translateX(-120%) skewX(-18deg); }
  100% { transform: translateX(240%)  skewX(-18deg); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translate3d(0, 24px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

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

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

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50%      { box-shadow: 0 0 0 16px transparent; }
}

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

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

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

@keyframes revealUp {
  from { opacity: 0; transform: translate3d(0, 40px, 0); filter: blur(8px); }
  to   { opacity: 1; transform: translate3d(0, 0, 0);    filter: blur(0);   }
}

/* ---------- Custom cursor ------------------------------------------------- */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--fg);
  mix-blend-mode: difference;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  transition: width 250ms var(--ease-out),
              height 250ms var(--ease-out),
              background 250ms var(--ease-out),
              opacity 200ms var(--ease-out);
  will-change: transform, width, height;
}

.cursor--trail {
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--fg);
  mix-blend-mode: difference;
  transition: transform 500ms var(--ease-out),
              width 400ms var(--ease-out),
              height 400ms var(--ease-out),
              opacity 200ms var(--ease-out);
}

.cursor.is-hover {
  width: 64px;
  height: 64px;
  background: var(--accent);
  mix-blend-mode: normal;
  opacity: 0.4;
}

.cursor.is-text {
  width: 4px;
  height: 28px;
  border-radius: 2px;
}

.cursor.is-hidden {
  opacity: 0;
}

/* Hide custom cursor on touch devices */
@media (hover: none), (pointer: coarse) {
  .cursor { display: none; }
}

/* ---------- Marquee (infinite category strip) ----------------------------- */
.marquee {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: var(--s-4) 0;
  border-block: 1px solid var(--border);
  background: var(--surface);
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}

.marquee__track {
  display: inline-flex;
  gap: var(--s-7);
  white-space: nowrap;
  animation: marqueeScroll 40s linear infinite;
  will-change: transform;
}

.marquee:hover .marquee__track {
  animation-play-state: paused;
}

.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: var(--s-5);
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--fg);
  text-transform: uppercase;
}

.marquee__item::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--accent);
  flex-shrink: 0;
}

.marquee__item--muted {
  color: transparent;
  -webkit-text-stroke: 1px var(--fg-muted);
  text-stroke: 1px var(--fg-muted);
}

.marquee--fast .marquee__track { animation-duration: 25s; }
.marquee--slow .marquee__track { animation-duration: 60s; }
.marquee--reverse .marquee__track { animation-direction: reverse; }

/* ---------- 3D tilt ------------------------------------------------------- */
.tilt {
  transform-style: preserve-3d;
  perspective: 1000px;
  will-change: transform;
  transition: transform 400ms var(--ease-out);
}

.tilt__inner {
  transform-style: preserve-3d;
  transition: transform 300ms var(--ease-out);
  will-change: transform;
}

.tilt__layer {
  transform: translateZ(0);
  transition: transform 300ms var(--ease-out);
}

.tilt__layer--1 { transform: translateZ(20px); }
.tilt__layer--2 { transform: translateZ(40px); }
.tilt__layer--3 { transform: translateZ(60px); }

/* ---------- Reveal on scroll ---------------------------------------------- */
/* Only hide initial state when user hasn't requested reduced motion AND JS loaded.
   Without JS or with reduced-motion, reveal elements stay visible (no empty sections). */
@media (prefers-reduced-motion: no-preference) {
  html.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 800ms var(--ease-out),
                transform 800ms var(--ease-out),
                filter 800ms var(--ease-out);
    will-change: opacity, transform;
  }

  html.js .reveal--left   { transform: translate3d(-40px, 0, 0); }
  html.js .reveal--right  { transform: translate3d(40px, 0, 0); }
  html.js .reveal--scale  { transform: scale(0.92); }
  html.js .reveal--blur   { filter: blur(10px); }
}

.reveal.is-visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
  filter: none !important;
}
.reveal--left.is-visible,
.reveal--right.is-visible { transform: translate3d(0, 0, 0) !important; }
.reveal--scale.is-visible { transform: scale(1) !important; }
.reveal--blur.is-visible  { filter: blur(0) !important; }

/* Safety net: if for any reason a reveal remains unhydrated after 3s, show it */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal--left, .reveal--right, .reveal--scale, .reveal--blur {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }
}

/* Staggered children */
.reveal--stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms var(--ease-out),
              transform 700ms var(--ease-out);
}
.reveal--stagger.is-visible > *       { opacity: 1; transform: translateY(0); }
.reveal--stagger.is-visible > *:nth-child(1)  { transition-delay: 40ms; }
.reveal--stagger.is-visible > *:nth-child(2)  { transition-delay: 100ms; }
.reveal--stagger.is-visible > *:nth-child(3)  { transition-delay: 160ms; }
.reveal--stagger.is-visible > *:nth-child(4)  { transition-delay: 220ms; }
.reveal--stagger.is-visible > *:nth-child(5)  { transition-delay: 280ms; }
.reveal--stagger.is-visible > *:nth-child(6)  { transition-delay: 340ms; }
.reveal--stagger.is-visible > *:nth-child(7)  { transition-delay: 400ms; }
.reveal--stagger.is-visible > *:nth-child(8)  { transition-delay: 460ms; }

/* Split-text character reveal (JS injects spans) */
.split-text__char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.4em);
  transition: opacity 500ms var(--ease-out),
              transform 500ms var(--ease-out);
  will-change: transform, opacity;
}
.split-text.is-visible .split-text__char {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Magnetic ------------------------------------------------------ */
.magnetic {
  display: inline-block;
  transition: transform 400ms var(--ease-out);
  will-change: transform;
}
.magnetic__inner {
  display: inline-block;
  transition: transform 400ms var(--ease-out);
  will-change: transform;
}

/* ---------- Gradient blob background -------------------------------------- */
.gradient-blob {
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%;
  background: radial-gradient(circle at 30% 30%, var(--accent) 0%, transparent 60%);
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
  z-index: -1;
  animation: blob 16s var(--ease-inout) infinite;
  will-change: transform, border-radius;
  mix-blend-mode: screen;
}

.gradient-blob--2 {
  background: radial-gradient(circle at 60% 40%, #ff7a00 0%, transparent 60%);
  opacity: 0.22;
  animation-duration: 22s;
  animation-direction: reverse;
}

.gradient-blob--3 {
  background: radial-gradient(circle at 50% 50%, #4f46e5 0%, transparent 60%);
  opacity: 0.18;
  animation-duration: 28s;
}

.gradient-blob--sm { width: 280px; height: 280px; filter: blur(50px); }
.gradient-blob--lg { width: 720px; height: 720px; filter: blur(120px); }

.gradient-mesh {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(at 12% 18%, rgba(255, 204, 0, 0.18), transparent 40%),
    radial-gradient(at 88% 12%, rgba(79, 70, 229, 0.15), transparent 45%),
    radial-gradient(at 70% 88%, rgba(255, 122, 0, 0.12), transparent 40%);
  filter: blur(40px);
  pointer-events: none;
}

/* ---------- Shine effect (button sweep) ----------------------------------- */
.shine {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.shine::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(
    110deg,
    transparent 0%,
    rgba(255, 255, 255, 0.25) 50%,
    transparent 100%
  );
  transform: translateX(-120%) skewX(-18deg);
  pointer-events: none;
  z-index: 1;
}

.shine:hover::before {
  animation: shine 900ms var(--ease-out) forwards;
}

/* Primary button — dimmer shine on yellow */
.btn-primary.shine::before {
  background: linear-gradient(
    110deg,
    transparent 0%,
    rgba(255, 255, 255, 0.55) 50%,
    transparent 100%
  );
}

/* ---------- Loading spinner ----------------------------------------------- */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: var(--radius-full);
  animation: spin 700ms linear infinite;
  display: inline-block;
}
.spinner--sm { width: 16px; height: 16px; border-width: 2px; }
.spinner--lg { width: 48px; height: 48px; border-width: 3px; }

/* ---------- Shimmer placeholder (image loading) --------------------------- */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--surface) 0%,
    var(--surface-2) 50%,
    var(--surface) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
}

/* ---------- Image lazy-load fade in --------------------------------------- */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 500ms var(--ease-out);
}
img[loading="lazy"].is-loaded,
img[loading="lazy"].loaded {
  opacity: 1;
}

/* ---------- Float animation (hero decorations) ---------------------------- */
.float {
  animation: floatY 6s var(--ease-inout) infinite;
  will-change: transform;
}
.float--slow  { animation-duration: 9s; }
.float--fast  { animation-duration: 4s; }
.float--delay { animation-delay: 1s; }

/* ---------- Pulse glow ---------------------------------------------------- */
.pulse-glow {
  animation: pulseGlow 2s var(--ease-inout) infinite;
}

/* ---------- Gradient text ------------------------------------------------- */
.gradient-text {
  background: linear-gradient(90deg, var(--fg) 0%, var(--accent) 50%, var(--fg) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 6s var(--ease-inout) infinite;
}

/* ---------- Noise overlay ------------------------------------------------- */
.noise::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 1;
}

/* ---------- Link underline sweep ------------------------------------------ */
.link-sweep {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1.5px;
  transition: background-size 500ms var(--ease-out), color 300ms var(--ease-out);
}
.link-sweep:hover {
  color: var(--accent);
  background-size: 100% 1.5px;
}

/* ---------- Parallax hint ------------------------------------------------- */
.parallax {
  will-change: transform;
  transform: translate3d(0, 0, 0);
}

/* ---------- Confetti container (used on success screen) ------------------- */
.confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-toast);
}

/* ---------- Entry fade ---------------------------------------------------- */
.fade-up   { animation: fadeUp 700ms var(--ease-out) both; }
.fade-in   { animation: fadeIn 500ms var(--ease-out) both; }
.reveal-up { animation: revealUp 900ms var(--ease-out) both; }

.delay-1 { animation-delay: 80ms; }
.delay-2 { animation-delay: 160ms; }
.delay-3 { animation-delay: 240ms; }
.delay-4 { animation-delay: 320ms; }
.delay-5 { animation-delay: 400ms; }

/* ---------- Reduced motion ------------------------------------------------ */
@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;
  }

  .marquee__track,
  .gradient-blob,
  .gradient-blob--2,
  .gradient-blob--3,
  .float,
  .pulse-glow,
  .gradient-text,
  .shimmer,
  .spinner {
    animation: none !important;
  }

  .cursor,
  .cursor--trail {
    display: none !important;
  }

  .reveal,
  .reveal--left,
  .reveal--right,
  .reveal--scale,
  .reveal--blur,
  .split-text__char,
  .reveal--stagger > * {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }

  .tilt,
  .tilt__inner,
  .tilt__layer {
    transform: none !important;
  }

  .hero__scroll-hint::after {
    animation: none !important;
    opacity: 0.5;
  }
}