:root {
  --bg: #0b0b0f;
  --text: #f4f6ff;
  --muted: rgba(244, 246, 255, 0.62);
  --line: rgba(244, 246, 255, 0.12);
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Zen Kaku Gothic New", ui-sans-serif, system-ui, -apple-system, "Hiragino Sans", sans-serif;
  background:
    radial-gradient(1200px 800px at 15% -10%, rgba(122, 167, 255, .22), transparent 55%),
    radial-gradient(900px 700px at 85% 10%, rgba(123, 255, 210, .16), transparent 60%),
    var(--bg);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center top;
  background-color: var(--bg);
  color: var(--text);
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px) saturate(1.2);
  background: rgba(10, 11, 18, .72);
  border-bottom: 1px solid var(--line);
  padding: 18px 16px 12px;
}

.title {
  max-width: 920px;
  margin: 0 auto;
}

h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: .04em;
  font-weight: 600;
}

.sub {
  margin: 4px 0 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 18px 16px 40px;
  display: grid;
  gap: 18px;
}

.section {
  padding: 2px 0;
}

.lead {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.meta {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

h2 {
  margin: 0 0 10px;
  font-size: 15px;
  letter-spacing: .06em;
}

ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

main a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 520px) {
  .wrap {
    padding: 16px 14px 32px;
  }

  .footer-inner {
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 6px;
  }

  .footer .dot {
    display: none;
  }
}

.footer {
  padding: 24px 16px 32px;
}

.footer-inner {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .06em;
}

.footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color .2s ease;
}

.footer a:hover {
  color: var(--text);
}

.dot {
  opacity: .6;
}