*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Courier New', Courier, monospace; background: #0d1117; color: #c9d1d9; line-height: 1.7; }
a { color: #58a6ff; text-decoration: none; }
a:hover { text-decoration: underline; }
header { border-bottom: 1px solid #21262d; padding: 1rem 2rem; display: flex; align-items: center; justify-content: space-between; }
header .logo { font-size: 1.2rem; font-weight: bold; color: #f0f6fc; }
nav a { margin-left: 1.5rem; color: #8b949e; font-size: 0.9rem; }
nav a:hover { color: #f0f6fc; text-decoration: none; }
main { max-width: 800px; margin: 3rem auto; padding: 0 2rem; }
h1 { font-size: 2rem; color: #f0f6fc; margin-bottom: 0.5rem; }
h2 { font-size: 1.4rem; color: #f0f6fc; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.1rem; color: #e6edf3; margin: 1.5rem 0 0.5rem; }
p { margin-bottom: 1rem; color: #8b949e; }
.subtitle { color: #6e7681; margin-bottom: 2rem; font-size: 0.95rem; }
.card { border: 1px solid #21262d; border-radius: 6px; padding: 1.25rem; margin-bottom: 1.25rem; background: #161b22; }
.card h3 { margin-top: 0; }
.tag { display: inline-block; background: #1f6feb22; border: 1px solid #1f6feb55; color: #58a6ff; border-radius: 4px; font-size: 0.75rem; padding: 2px 8px; margin: 0 4px 4px 0; }
.meta { font-size: 0.82rem; color: #6e7681; margin-bottom: 0.5rem; }
ul { padding-left: 1.5rem; margin-bottom: 1rem; }
li { color: #8b949e; margin-bottom: 0.3rem; }
code { background: #161b22; border: 1px solid #21262d; border-radius: 4px; padding: 2px 6px; font-size: 0.9em; color: #e6edf3; }
pre { background: #161b22; border: 1px solid #21262d; border-radius: 6px; padding: 1rem; overflow-x: auto; margin-bottom: 1rem; }
pre code { border: none; padding: 0; background: transparent; }
footer { border-top: 1px solid #21262d; margin-top: 4rem; padding: 1.5rem 2rem; text-align: center; font-size: 0.82rem; color: #6e7681; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
hr { border: none; border-top: 1px solid #21262d; margin: 2rem 0; }