:root {
  --bg: #0f1419;
  --card: #1a222c;
  --text: #e8eef4;
  --muted: #93a4b5;
  --accent: #6ee7b7;
  --line: #2a3644;
  --max: 44rem;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a {
  color: var(--accent);
}

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

header {
  padding: 1.25rem 0 0.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--text);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  margin-top: 0.75rem;
}

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

nav a:hover,
nav a[aria-current="page"] {
  color: var(--accent);
}

h1 {
  font-size: 1.7rem;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

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

.muted {
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.25rem 1.35rem;
}

ul {
  padding-left: 1.2rem;
}

footer {
  margin-top: 2.5rem;
  padding: 1.25rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.92em;
  background: #0b1015;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}