/* Reset + фон + типографика */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

a {
  color: var(--cyan);
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
  font-weight: 700;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: rgba(0, 229, 255, 0.3);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Фон: космос, свечение, сетка, скан-линия ---------- */
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: radial-gradient(120% 80% at 50% -10%, #0b1530 0%, var(--bg) 60%);
}

.bg > div {
  position: absolute;
  inset: 0;
}

.bg__stars {
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(230, 247, 255, 0.7), transparent 60%),
    radial-gradient(1px 1px at 27% 72%, rgba(230, 247, 255, 0.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 41% 33%, rgba(124, 255, 203, 0.6), transparent 60%),
    radial-gradient(1px 1px at 58% 84%, rgba(230, 247, 255, 0.45), transparent 60%),
    radial-gradient(1px 1px at 66% 12%, rgba(230, 247, 255, 0.6), transparent 60%),
    radial-gradient(1.5px 1.5px at 79% 46%, rgba(0, 229, 255, 0.7), transparent 60%),
    radial-gradient(1px 1px at 88% 78%, rgba(230, 247, 255, 0.5), transparent 60%),
    radial-gradient(1px 1px at 94% 26%, rgba(182, 156, 255, 0.6), transparent 60%),
    radial-gradient(1px 1px at 6% 90%, rgba(230, 247, 255, 0.4), transparent 60%),
    radial-gradient(1px 1px at 50% 55%, rgba(230, 247, 255, 0.35), transparent 60%);
  background-size: 640px 640px;
  opacity: 0.8;
}

.bg__glow {
  background:
    radial-gradient(55% 45% at 85% 0%, rgba(0, 229, 255, 0.16), transparent 70%),
    radial-gradient(45% 40% at 0% 100%, rgba(124, 255, 203, 0.1), transparent 70%),
    radial-gradient(35% 30% at 55% 55%, rgba(182, 156, 255, 0.06), transparent 70%);
}

.bg__grid {
  background-image:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 25%, transparent 85%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 25%, transparent 85%);
}

.bg__scan {
  inset: auto 0 auto 0 !important;
  top: -20%;
  height: 160px;
  background: linear-gradient(180deg, transparent, rgba(0, 229, 255, 0.05), transparent);
  animation: scan 11s linear infinite;
}

@keyframes scan {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(140vh);
  }
}

@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;
  }
  .bg__scan {
    display: none;
  }
}