:root {
  color-scheme: dark;
  --bg: #090d11;
  --bg2: #121821;
  --panel: #0f141c;
  --text: #dce4ef;
  --muted: #93a2b4;
  --line: #233143;
  --accent: #7fb2ff;
  --max-width: 840px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  font: 16px/1.65 "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% -10%, #1d2735 0%, transparent 38%),
    radial-gradient(circle at 92% 12%, #162132 0%, transparent 32%),
    linear-gradient(180deg, var(--bg2) 0%, var(--bg) 62%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(110, 145, 191, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 145, 191, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 20%, black 20%, transparent 75%);
}

.site-header,
main,
footer {
  position: relative;
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.site-header {
  padding-top: 3.2rem;
  padding-bottom: 1.8rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--text);
  text-decoration: none;
  font-family: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand span {
  font-size: 0.95rem;
}

.site-header p {
  margin: 1rem 0 0;
  color: var(--muted);
}

main {
  padding-block: 2.2rem;
}

section {
  background: color-mix(in srgb, var(--panel) 85%, transparent);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem 1.25rem 1.2rem;
}

section + section {
  margin-top: 1rem;
}

h1,
h2 {
  margin: 0 0 0.7rem;
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: 0.015em;
}

h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--accent);
}

p,
li {
  max-width: 72ch;
}

ul,
ol {
  margin: 0;
  padding-left: 1.15rem;
}

li + li {
  margin-top: 0.35rem;
}

footer {
  padding: 1.3rem 0 2.8rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

a {
  color: var(--text);
  text-decoration-color: color-mix(in srgb, var(--accent) 70%, white 30%);
  text-underline-offset: 0.2rem;
}

a:hover {
  color: #ffffff;
}