:root {
  color-scheme: dark;
  --bg: #08111d;
  --panel: rgba(19, 31, 48, 0.82);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f5f7fb;
  --muted: #a7b0c0;
  --accent: #9b6cff;
  --accent-soft: rgba(155, 108, 255, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 14% 12%, rgba(155, 108, 255, 0.2), transparent 28rem),
    radial-gradient(circle at 88% 8%, rgba(56, 189, 248, 0.12), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--text);
  text-decoration-color: var(--accent);
  text-underline-offset: 0.22em;
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 52px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  letter-spacing: 0;
}

.mark {
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: linear-gradient(145deg, #b38cff, #7047ff);
  box-shadow: 0 12px 32px rgba(155, 108, 255, 0.36);
}

.nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

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

.document {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(19, 31, 48, 0.92), var(--panel));
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.28);
}

.hero {
  padding: 42px clamp(22px, 5vw, 54px) 30px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.15rem, 7vw, 4.5rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.updated {
  margin: 18px 0 0;
  color: var(--muted);
}

.content {
  padding: 28px clamp(22px, 5vw, 54px) 48px;
}

h2 {
  margin: 32px 0 8px;
  font-size: 1.15rem;
  line-height: 1.25;
}

p,
li {
  color: var(--muted);
}

ul {
  padding-left: 1.25rem;
}

.notice {
  margin: 24px 0 0;
  padding: 16px 18px;
  border: 1px solid rgba(155, 108, 255, 0.26);
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--text);
}

.footer {
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 620px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 34px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .shell {
    width: min(100% - 20px, 920px);
    padding-top: 24px;
  }
}