:root {
  --ink: #14161c;
  --muted: #5c6170;
  --line: #e4e1d8;
  --paper: #f7f5f0;
  --card: #fffdf8;
  --accent: #128a4a;
  --accent-soft: #e8f6ee;
  --danger: #8a2a2a;
  --font: "SF Pro Text", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.55;
  font-size: 16px;
}

a {
  color: var(--accent);
}

.top {
  background: #0b0c10;
  color: #fff;
  padding: 18px 24px;
}

.top-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand span {
  color: #2eff8c;
}

.top nav {
  display: flex;
  gap: 16px;
  font-size: 13px;
}

.top nav a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
}

.top nav a:hover,
.top nav a.is-on {
  color: #2eff8c;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

header.doc-head {
  margin-bottom: 28px;
}

.kicker {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
}

h1 {
  font-size: 32px;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin: 0 0 12px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.meta strong {
  color: var(--ink);
}

.lead {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
  margin: 20px 0 28px;
}

h2 {
  font-size: 20px;
  letter-spacing: -0.03em;
  margin: 36px 0 10px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

h3 {
  font-size: 16px;
  margin: 20px 0 8px;
}

p,
li {
  color: #22252c;
}

ul,
ol {
  padding-left: 22px;
}

li {
  margin: 6px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin: 12px 0 20px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

th {
  background: var(--accent-soft);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #1d4d33;
}

tr:last-child td {
  border-bottom: 0;
}

.note {
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  margin: 14px 0;
  background: var(--accent-soft);
  border-radius: 0 10px 10px 0;
}

.warn {
  border-left: 3px solid var(--danger);
  padding: 8px 12px;
  margin: 14px 0;
  background: #f8ecec;
  border-radius: 0 10px 10px 0;
}

.toc {
  columns: 2;
  gap: 24px;
  font-size: 14px;
  margin: 0 0 8px;
}

.toc ol {
  margin: 0;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: #efece4;
  padding: 1px 5px;
  border-radius: 4px;
}

@media (max-width: 700px) {
  .toc {
    columns: 1;
  }

  .top-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  h1 {
    font-size: 26px;
  }
}

@media print {
  .top {
    background: #fff;
    color: #000;
    border-bottom: 1px solid #ccc;
  }

  .top nav,
  footer a {
    display: none;
  }

  .wrap {
    padding: 0;
  }
}