*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-0: #050505;
  --bg-1: #0c0c0e;
  --bg-2: #141418;
  --card-radius: 0.85em;
  --card-max: 32em;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: #f2f2f2;
  background:
    radial-gradient(
      120% 90% at 50% 42%,
      rgba(40, 40, 48, 0.55) 0%,
      transparent 58%
    ),
    radial-gradient(80% 60% at 50% 100%, rgba(20, 20, 28, 0.9) 0%, transparent 55%),
    linear-gradient(165deg, var(--bg-2) 0%, var(--bg-1) 42%, var(--bg-0) 100%);
  background-color: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Stage
   -------------------------------------------------------------------------- */

.app {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

/* --------------------------------------------------------------------------
   Card
   -------------------------------------------------------------------------- */

.refract {
  --aspect: 1 / 1.25;

  position: relative;
  width: min(100%, var(--card-max));
  aspect-ratio: var(--aspect);
  border-radius: var(--card-radius);
  overflow: hidden;
  background: #0a0a0a;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06),
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 24px 48px rgba(0, 0, 0, 0.55),
    0 48px 100px rgba(0, 0, 0, 0.45);
  cursor: none;
  isolation: isolate;
  /* Entrance start state — GSAP animates these */
  opacity: 0;
  transform: scale(0.96);
  will-change: transform, opacity;
}

.refract.is-ready {
  cursor: crosshair;
}

.refract__canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

/* --------------------------------------------------------------------------
   Loader
   -------------------------------------------------------------------------- */

.refract__loader {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: #0a0a0a;
  transition: opacity 0.45s var(--ease-out);
  pointer-events: none;
  z-index: 2;
}

.refract__loader.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.refract__loader-bar {
  width: 2.5rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.7) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: loader-sweep 1.1s ease-in-out infinite;
}

@keyframes loader-sweep {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .refract {
    opacity: 1;
    transform: none;
  }

  .refract__loader-bar {
    animation: none;
    background: rgba(255, 255, 255, 0.45);
  }
}