:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
    min-width: 320px;
    margin: 0;
    padding: 54px 20px;
    background: radial-gradient(circle at 50% -20%, #292d3e 0, #151822 40%, #0f1117 76%);
    color: #c4cad6;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 15px;
    line-height: 1.65;
}
main {
    width: min(100%, 820px);
    margin: 0 auto;
    padding: 30px;
    border: 1px solid #2e3443;
    border-radius: 12px;
    background: rgba(27, 31, 42, .93);
    box-shadow: 0 18px 40px rgba(0, 0, 0, .15);
}
h1, h2, h3 { color: #f5f6f9; }
h1 { margin: 12px 0 8px; font-size: 29px; letter-spacing: -.04em; }
h2 { margin: 34px 0 10px; font-size: 19px; letter-spacing: -.02em; }
h3 { margin: 24px 0 6px; font-size: 16px; }
p { margin: 0 0 15px; }
ul { margin: 0 0 15px; padding-left: 24px; }
li { margin-bottom: 5px; }
a { color: #ef7671; text-decoration: none; }
a:hover { color: #ff918b; text-decoration: underline; }
code { padding: 2px 5px; border-radius: 4px; background: #202532; color: #dde1ea; }
@media (max-width: 560px) { body { padding: 24px 12px; font-size: 14px; } main { padding: 22px; border-radius: 10px; } h1 { font-size: 25px; } }