:root { --indigo:#4f46e5; --dark:#111827; --gray:#6b7280; --light:#f3f4f6; }
* { box-sizing: border-box; }
body { font: 17px/1.65 system-ui, -apple-system, sans-serif; color: var(--dark); margin: 0; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }
header { padding: 22px 0; border-bottom: 1px solid #eee; }
header .wrap { display: flex; align-items: center; gap: 10px; }
header img { width: 34px; height: 34px; }
header b { font-size: 19px; }
header nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
header nav a { color: var(--gray); text-decoration: none; }
h1 { font-size: 40px; line-height: 1.15; margin: 40px 0 14px; }
h2 { font-size: 26px; margin: 38px 0 12px; }
.sub { font-size: 21px; color: var(--gray); margin: 0 0 28px; }
.cta { display: inline-block; background: var(--indigo); color: #fff; padding: 14px 26px; border-radius: 10px; font-weight: 700; text-decoration: none; font-size: 18px; }
.cta.small { padding: 10px 18px; font-size: 16px; }
.note { color: var(--gray); font-size: 14px; margin-top: 8px; }
.modes { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; margin: 24px 0; }
.modes div { background: var(--light); border-radius: 10px; padding: 14px 16px; }
.modes b { color: var(--indigo); }
ol li, ul li { margin: 6px 0; }
.related { background: var(--light); border-radius: 12px; padding: 18px 22px; margin: 36px 0; }
.related a { color: var(--indigo); }
footer { border-top: 1px solid #eee; margin-top: 50px; padding: 26px 0; color: var(--gray); font-size: 14px; }
footer a { color: var(--gray); }
code { background: var(--light); padding: 1px 6px; border-radius: 5px; font-size: 15px; }