:root { color-scheme: dark; }
body { margin: 0; background: #0b0f14; color: #d8e1ea; font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Segoe UI", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
nav { display: flex; gap: 18px; font-size: 14px; margin-bottom: 28px; }
a { color: #5fd4e8; }
h1 { font-size: 26px; line-height: 1.3; color: #fff; letter-spacing: .02em; }
h2 { font-size: 19px; color: #fff; margin-top: 36px; border-bottom: 1px solid #1f2a36; padding-bottom: 6px; }
h3 { font-size: 16px; color: #ffb35c; margin: 26px 0 6px; }
hr { border: 0; border-top: 1px solid #1f2a36; margin: 48px 0; }
code { background: #16202b; padding: 1px 5px; border-radius: 3px; }
footer { color: #7d8b99; font-size: 13px; }
.lead { font-size: 18px; color: #fff; }