:root {
  color-scheme: dark;
  --background: #071017;
  --panel: #0c1821;
  --border: #20313d;
  --text: #d9e4e9;
  --muted: #91a3ad;
  --accent: #28dab1;
  --warning: #f0bd63;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
}

main {
  width: min(850px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 80px;
}

header,
section,
.notice {
  margin-bottom: 20px;
  padding: 22px 26px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
}

.brand,
h1,
h2 {
  color: #f2f8fa;
}

.brand {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand span,
a {
  color: var(--accent);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.15;
}

h2 {
  margin: 0 0 10px;
  font-size: 21px;
}

p,
ul {
  margin: 8px 0;
}

li + li {
  margin-top: 6px;
}

.meta,
footer {
  color: var(--muted);
}

.notice {
  border-color: #755b2f;
  color: #f7d99d;
}

.notice strong {
  color: var(--warning);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 20px;
}

a:hover,
a:focus-visible {
  text-underline-offset: 4px;
}

footer {
  padding: 8px 4px;
  font-size: 14px;
}

@media (max-width: 600px) {
  main {
    width: min(100% - 20px, 850px);
    padding-top: 20px;
  }

  header,
  section,
  .notice {
    padding: 18px;
  }
}