:root { --ink: #1c1a17; --ink2: #5e5850; --ground: #fffdf7; --rule: #e8e1d3; --accent: #b58300; --lamp: #ffd43b; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #f4efe6; --ink2: #b9b1a4; --ground: #1a1815; --rule: #39342d; --accent: #ffcf3f; }
}
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink);
       font: 17px/1.5 -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 20px 48px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header a { color: var(--ink); text-decoration: none; font-weight: 600; }
h1 { font-size: 30px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 6px; }
p.lead { color: var(--ink2); font-size: 19px; margin: 0 0 24px; }
a { color: var(--accent); }
.button { display: inline-block; background: var(--lamp); color: #16130f; font-weight: 600;
          text-decoration: none; padding: 14px 22px; border-radius: 999px; }
.code { font: 600 34px/1.2 ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: 0.12em;
        border: 2px solid var(--rule); border-radius: 18px; padding: 18px; text-align: center; margin: 8px 0 20px; }
ol { padding-left: 22px; }
li { margin: 6px 0; }
footer { border-top: 1px solid var(--rule); margin-top: 48px; padding-top: 16px; color: var(--ink2); font-size: 15px; }
footer a { color: var(--ink2); margin-right: 16px; }