:root {
  --bg: #0b0e11;
  --panel: #161a1f;
  --text: #f2f4f5;
  --muted: #9aa3ab;
  --accent: #c4fa7a;
  --line: #262c33;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

header img {
  width: 64px;
  height: 64px;
  border-radius: 14px;
}

header p { margin: 0; color: var(--muted); font-size: 15px; }

h1 { margin: 0; font-size: 28px; line-height: 1.2; }
h2 { margin: 40px 0 8px; font-size: 20px; }
h3 { margin: 24px 0 4px; font-size: 17px; }

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

ul { padding-left: 22px; }
li { margin: 6px 0; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin: 24px 0;
}

.card p { margin: 4px 0; }

nav {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 15px;
}

nav a { margin-right: 20px; }