:root {
  --paper: #efe8dc;
  --card: #fffdf8;
  --ink: #1c1915;
  --muted: #5e574c;
  --line: #d5cbb8;
  --accent: #0f4c5c;
  --accent-ink: #f3fbfb;
  --warn: #7a341c;
  --warn-bg: #f8ebe4;
  --ok: #1c5a3c;
  --ok-bg: #e4f2ea;
  --shadow: 0 10px 30px rgba(48, 36, 18, 0.06);
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 1080px;
  padding: 28px 20px 48px;
}

button, input, select, textarea { font: inherit; color: inherit; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0; }

h1 { font-size: 1.7rem; }

.mast {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 18px 20px 16px;
}

.mast-row {
  display: flex;
  align-items: baseline;
  gap: 16px;
  border-bottom: 3px double var(--ink);
  padding-bottom: 8px;
}

.brand {
  margin: 0;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
}

.mast-meta {
  margin: 0 0 0 auto;
  color: var(--muted);
  font-size: 0.92rem;
}

.lede {
  margin: 10px 0 0;
  color: var(--muted);
}

.steps {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}

.steps button {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--muted);
}

.steps button[aria-current="step"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.callout, .card, .panel, .doc, form, .banner {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.callout {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  border-left: 6px solid var(--warn);
  margin-bottom: 14px;
}

.callout.review { border-left-color: var(--accent); }

.callout-actions, .toolbar { display: flex; gap: 8px; flex-wrap: wrap; }

.toolbar { margin: 12px 0; }

a.button { display: inline-block; text-decoration: none; }

.callout p { margin: 4px 0 0; color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.card {
  text-align: left;
  padding: 14px;
  min-height: 148px;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.card:hover, .card:focus-visible { border-color: var(--accent); }

.card .kicker {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.card h2 { font-size: 1.15rem; margin-bottom: 8px; }

.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.section-head, .actions, .doc-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.section-head { margin-bottom: 10px; }

form { padding: 16px 18px 18px; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
}

.span-2 { grid-column: span 2; }

label, legend { font-size: 0.92rem; font-weight: 650; }

input, select, textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

textarea { resize: vertical; }

fieldset {
  margin: 0;
  padding: 8px 12px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.choices { display: flex; gap: 16px; margin-top: 6px; font-weight: 500; }

.choices label { display: flex; gap: 6px; align-items: center; font-weight: 500; }

.choices input { width: auto; margin: 0; }

.hint, .source-note { color: var(--muted); font-size: 0.88rem; margin: 4px 0 10px; }

.actions { margin-top: 16px; }

.button {
  background: var(--accent);
  color: var(--accent-ink);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 8px 14px;
  cursor: pointer;
}

.button.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.button:focus-visible, .card:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.errors {
  background: var(--warn-bg);
  color: var(--warn);
  border-radius: 6px;
  padding: 8px 12px;
  margin-bottom: 12px;
}

.banner { padding: 14px 16px; margin-bottom: 12px; }
.banner.stop { background: var(--warn-bg); border-color: #e4c2b4; }
.banner.go { background: var(--ok-bg); border-color: #b7d7c4; }
.banner h2 { margin-bottom: 4px; }
.banner p { margin: 0; }

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.fact {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}

.fact.wide { grid-column: span 2; }

.fact span { display: block; color: var(--muted); font-size: 0.78rem; }
.fact strong, .path { font-family: ui-monospace, "Cascadia Code", "Source Code Pro", monospace; font-size: 0.86rem; font-weight: 600; word-break: break-all; }

.panel { padding: 14px 16px 16px; margin-bottom: 12px; }
.panel h3 { margin-bottom: 8px; }

.check { display: flex; gap: 10px; align-items: flex-start; margin: 8px 0; }
.check input { width: auto; margin-top: 4px; }

.tbd { margin: 6px 0 0; padding-left: 18px; }
.tbd li { margin: 2px 0; }

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 6px 8px; vertical-align: top; }
th { color: var(--muted); font-weight: 650; }

.swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 1px solid #1c1915;
  vertical-align: -2px;
  margin-right: 4px;
}

.doc-nav { flex-wrap: wrap; justify-content: flex-start; margin-bottom: 8px; }
.doc-nav button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

.doc-nav button, .doc-link {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
  color: var(--accent);
}

.doc { padding: 8px 16px 16px; }
.doc h2 { font-size: 1.25rem; margin: 14px 0 8px; }
.doc h3 { font-size: 1.05rem; margin: 12px 0 6px; }
.doc h4 { font-size: 1rem; margin: 10px 0 6px; }
.doc p { margin: 6px 0; }
.doc ul, .doc ol { margin: 6px 0 6px 1.2rem; padding: 0; }
.doc code { font-family: ui-monospace, "Cascadia Code", monospace; font-size: 0.88em; }
.doc pre { background: #f6f1e7; padding: 10px; overflow: auto; border-radius: 6px; }

.scroll-table { overflow: auto; max-height: 360px; }

.sheet {
  display: block;
  width: 100%;
  height: auto;
  margin: 12px 0;
  background: #fff;
  border: 1px solid var(--line);
}

.foot { margin-top: 18px; color: var(--muted); font-size: 0.85rem; }

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .cards, .facts, .grid-2 { grid-template-columns: 1fr; }
  .fact.wide { grid-column: auto; }
  .span-2 { grid-column: auto; }
  .callout, .mast-row { flex-direction: column; align-items: flex-start; }
  .mast-meta { margin-left: 0; }
}

.mast-row .brand { display:flex; align-items:center; gap:8px; text-decoration:none; color:inherit; }