:root {
  --bg: #090a0f;
  --surface: #141720;
  --text: #f7f8fb;
  --muted: #a6adbb;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.32);
  --accent: #65e8ff;
}

body {
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  isolation: isolate;
}

body::before {
  content: "";
  position: fixed;
  inset: -25%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 14% 22%, rgba(76, 111, 255, 0.5) 0 8%, transparent 32%),
    radial-gradient(circle at 84% 18%, rgba(101, 232, 255, 0.34) 0 7%, transparent 30%),
    radial-gradient(circle at 52% 82%, rgba(180, 124, 255, 0.3) 0 8%, transparent 34%),
    conic-gradient(from 215deg at 50% 50%, transparent 0 24%, rgba(101, 232, 255, 0.12) 34%, rgba(118, 182, 255, 0.2) 42%, transparent 55% 100%);
  filter: saturate(1.25);
  animation: auroraDrift 11s cubic-bezier(0.45, 0, 0.55, 1) infinite alternate;
  will-change: transform, filter;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.34;
  background: linear-gradient(108deg, transparent 32%, rgba(255, 255, 255, 0.12) 48%, transparent 64%);
  background-size: 220% 100%;
  animation: lightSweep 7s ease-in-out infinite;
}

@keyframes auroraDrift {
  from {
    transform: translate3d(-4%, -2%, 0) rotate(-2deg) scale(1);
    filter: saturate(1.15) hue-rotate(-6deg);
  }

  to {
    transform: translate3d(4%, 3%, 0) rotate(3deg) scale(1.12);
    filter: saturate(1.45) hue-rotate(12deg);
  }
}

@keyframes lightSweep {
  0%, 18% {
    background-position: 120% 0;
    opacity: 0;
  }

  48% {
    opacity: 0.36;
  }

  78%, 100% {
    background-position: -120% 0;
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  body::before,
  body::after {
    animation: none;
  }
}