:root {
  --bg: #f5f6f8;
  --paper: #fff;
  --text: #1a1a1a;
  --muted: #555;
  --border: #c8ccd4;
  --link: #0563c1;
  --hl: #ffff00;
  --header-bg: #e8e8e8;
  --warn: #fff3cd;
  --warn-border: #e6c200;
  --max: 960px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
}

[id] { scroll-margin-top: 1rem; }

.doc-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.doc-paper {
  background: var(--paper);
  border: 1px solid var(--border);
  padding: 1.5rem 2rem 2rem;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}

.poc-banner {
  background: var(--warn);
  border: 1px solid var(--warn-border);
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 13px;
}

.poc-banner a { color: var(--link); }

.doc-title {
  text-align: center;
  font-size: 1.35rem;
  font-weight: bold;
  margin: 0 0 1rem;
}

.meta-table {
  width: 100%;
  max-width: 320px;
  margin: 0 0 1.5rem auto;
  border-collapse: collapse;
  font-size: 13px;
}

.meta-table th,
.meta-table td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.5rem;
  text-align: left;
}

.meta-table th { background: var(--header-bg); font-weight: normal; }

h2 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
}

h3 { font-size: 1rem; margin: 1rem 0 0.4rem; }

h4 { font-size: 0.95rem; margin: 0.85rem 0 0.35rem; }

p { margin: 0.4rem 0 0.8rem; }

nav.toc {
  margin: 1rem 0 1.5rem;
  padding: 1rem;
  background: #fafafa;
  border: 1px solid var(--border);
}

nav.toc h2 { margin-top: 0; border: none; }

.toc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem 2rem;
}

.toc-grid a {
  color: var(--link);
  text-decoration: underline;
}

ul { margin: 0.4rem 0 0.8rem; padding-left: 1.4rem; }

.procedure-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.25rem;
  font-size: 13px;
}

.procedure-table th,
.procedure-table td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.6rem;
  vertical-align: top;
}

.procedure-table th {
  background: var(--header-bg);
  font-weight: bold;
  text-align: left;
}

.procedure-table .step-num {
  width: 3rem;
  font-weight: bold;
  background: #f0f0f0;
}

.hl { background: var(--hl); }

.callout-panel {
  padding: 0.75rem;
  margin: 1rem 0;
}

.callout-panel.compact {
  padding: 0.5rem;
  margin: 0.5rem 0;
}

.alert-panel {
  border: 2px solid var(--link);
  padding: 0.75rem;
  margin: 1rem 0;
}

.action-red {
  color: #b00020;
  font-weight: bold;
}

.sub-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.35rem 0;
  font-size: 12px;
}

.sub-table th,
.sub-table td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.45rem;
}

.tip {
  display: flex;
  gap: 0.5rem;
  margin: 0.5rem 0;
  font-size: 13px;
  color: var(--muted);
}

.tip::before { content: "💡"; }

.poc-gap {
  background: #f8f8f8;
  border-left: 3px solid var(--muted);
  padding: 0.5rem 0.75rem;
  margin: 0.75rem 0;
  font-size: 13px;
  color: var(--muted);
}

.page-ref {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
}

.footer-legal {
  font-size: 11px;
  color: var(--muted);
  margin-top: 1.5rem;
  text-align: center;
}

.revision-table,
.business-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1rem;
}

.revision-table th,
.revision-table td,
.business-table th,
.business-table td {
  border: 1px solid var(--border);
  padding: 0.45rem 0.55rem;
  vertical-align: top;
}

.business-table th {
  background: var(--header-bg);
  font-weight: bold;
  width: 30%;
  text-align: left;
}

.revision-table thead th,
.business-table thead th {
  background: var(--hl);
  font-weight: bold;
}

.back-menu {
  text-align: right;
  margin-top: 1rem;
}

.back-menu a { color: var(--link); }

@media (max-width: 640px) {
  .toc-grid { grid-template-columns: 1fr; }
  .doc-paper { padding: 1rem; }
}