:root {
  --bg: #f7f8f6;
  --surface: #ffffff;
  --ink: #17201b;
  --muted: #56635b;
  --line: #d9dfda;
  --accent: #0b6b4f;
  --accent-ink: #ffffff;
  --soft: #e3f0ea;
  --warn-bg: #fdf3df;
  --warn-ink: #5f4308;
  --warn-line: #e8d09c;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101512;
    --surface: #181f1b;
    --ink: #eaf0ec;
    --muted: #a3b0a8;
    --line: #2d3731;
    --accent: #52c79c;
    --accent-ink: #08130e;
    --soft: #1c2d25;
    --warn-bg: #2d2412;
    --warn-ink: #f0d9a3;
    --warn-line: #57451e;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; }
h1 { font-size: clamp(2.1rem, 6vw, 3.5rem); margin: 0 0 16px; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin: 0 0 12px; }
h3 { font-size: 1.15rem; margin: 0 0 8px; }
p { margin: 0 0 14px; }

.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; color: var(--ink); text-decoration: none; }
.brand svg { width: 26px; height: 26px; color: var(--accent); }
nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
nav a { color: var(--muted); text-decoration: none; padding: 4px 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }

main { padding: 44px 0 64px; }
.hero { padding: 28px 0 44px; max-width: 760px; }
.lede { font-size: 1.2rem; color: var(--muted); }
.btn { display: inline-block; padding: 11px 20px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; margin: 6px 10px 6px 0; }
.btn.alt { background: transparent; color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }

section { margin-bottom: 44px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card p:last-child { margin-bottom: 0; }
.card a.more { font-weight: 600; }

.steps { list-style: none; padding: 0; margin: 0; counter-reset: step; display: grid; gap: 12px; }
.steps li { counter-increment: step; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px 16px 60px; position: relative; }
.steps li::before { content: counter(step); position: absolute; left: 18px; top: 16px; width: 28px; height: 28px; border-radius: 50%; background: var(--soft); color: var(--accent); display: grid; place-items: center; font-weight: 700; font-size: 0.9rem; }

.notice { background: var(--warn-bg); color: var(--warn-ink); border: 1px solid var(--warn-line); border-radius: 12px; padding: 18px 20px; }
.notice a { color: inherit; }
.notice p:last-child { margin-bottom: 0; }

.article { max-width: 760px; }
.article section { scroll-margin-top: 16px; }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin-bottom: 36px; }
.toc ul { margin: 6px 0 0; padding-left: 20px; }
.example { background: var(--soft); border-radius: 10px; padding: 14px 18px; margin: 14px 0; }

label { display: block; font-size: 0.92rem; font-weight: 600; margin-bottom: 12px; }
input { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
input:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.result { margin-top: 6px; padding: 14px 16px; background: var(--soft); border-radius: 10px; min-height: 56px; }
.result strong { font-size: 1.15rem; }
.result.error { background: var(--warn-bg); color: var(--warn-ink); }

.search { max-width: 460px; margin-bottom: 22px; }
dl { margin: 0; display: grid; gap: 12px; }
.term { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; }
dt { font-weight: 700; }
dd { margin: 4px 0 0; color: var(--muted); }

.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding: 26px 0; color: var(--muted); font-size: 0.92rem; }
.site-footer nav { margin-bottom: 10px; }