:root {
  --bg: #f7f8f6; --surface: #ffffff; --ink: #16211f; --muted: #5d6b67; --line: #dfe5e1;
  --accent: #0f7b6c; --accent-ink: #ffffff; --accent-soft: #e3f1ed;
  --display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", sans-serif;
  --body: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #121917; --surface: #1a2320; --ink: #eef3f0; --muted: #9fb0aa; --line: #2b3733;
  --accent: #4cc3ad; --accent-ink: #0b1613; --accent-soft: #1d2f2a;
} }
:root[data-theme="dark"] {
  --bg: #121917; --surface: #1a2320; --ink: #eef3f0; --muted: #9fb0aa; --line: #2b3733;
  --accent: #4cc3ad; --accent-ink: #0b1613; --accent-soft: #1d2f2a;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 18px; line-height: 1.55; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
header.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; }
.brand { font-family: var(--display); font-weight: 700; font-size: 22px; letter-spacing: -0.01em; color: var(--ink); text-decoration: none; }
.brand small { display: block; font-family: var(--body); font-weight: 400; font-size: 13px; color: var(--muted); letter-spacing: 0.02em; }
nav.top a { margin-left: 18px; font-size: 16px; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.02em; line-height: 1.15; text-wrap: balance; margin: 0 0 12px; }
h1 { font-size: clamp(34px, 6vw, 56px); font-weight: 700; max-width: 18ch; }
h2 { font-size: clamp(24px, 3.5vw, 32px); font-weight: 600; margin-top: 56px; }
h3 { font-size: 20px; font-weight: 600; margin-top: 24px; }
p, li { max-width: 66ch; }
.lead { font-size: 21px; color: var(--muted); max-width: 56ch; }
.hero { padding: 48px 0 24px; }
.cta { display: inline-block; margin-top: 20px; padding: 12px 20px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; }
.cta.secondary { background: var(--accent-soft); color: var(--ink); margin-left: 8px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 24px; }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; }
.step .n { font-family: var(--mono); font-size: 13px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; }
.step h3 { margin-top: 6px; }
.step p { margin: 6px 0 0; color: var(--muted); font-size: 17px; }
pre { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; overflow-x: auto; font-family: var(--mono); font-size: 14.5px; line-height: 1.5; }
code { font-family: var(--mono); font-size: 0.92em; }
table { border-collapse: collapse; width: 100%; margin-top: 16px; font-size: 17px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; }
.note { border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; color: var(--muted); }
footer { margin-top: 72px; padding: 28px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; display: flex; flex-wrap: wrap; gap: 8px 24px; }
footer a { color: var(--muted); }
article { padding: 24px 0; }
article h1 { font-size: clamp(30px, 5vw, 42px); }
article .meta { color: var(--muted); font-size: 15px; margin-bottom: 28px; }
article h2 { margin-top: 36px; font-size: 24px; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }