:root {
  --navy: #0b1220;
  --navy-2: #172033;
  --surface: #ffffff;
  --surface-soft: #f6f8fb;
  --text: #172033;
  --muted: #566176;
  --line: #d9dee7;
  --line-dark: #313b4e;
  --link: #1d4f91;
  --link-hover: #163e72;
  --warning: #8a4b08;
  --warning-bg: #fff8eb;
  --max: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a { color: var(--link); }
a:hover { color: var(--link-hover); }

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 100;
  padding: 8px 12px;
  color: #ffffff;
  background: var(--navy);
}

.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 3px solid #e9a23b;
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  color: #e8edf5;
  background: var(--navy);
  border-bottom: 1px solid var(--line-dark);
}

.header-inner {
  width: min(var(--max), calc(100% - 32px));
  min-height: 58px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: #ffffff;
  font-weight: 750;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-header nav a {
  color: #b9c2d1;
  text-decoration: none;
}

.site-header nav a:hover { color: #ffffff; }

.page-shell {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.page-intro {
  padding: 54px 0 42px;
  border-bottom: 1px solid var(--line);
}

.breadcrumb {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb a { text-decoration: none; }

h1,
h2,
h3 {
  color: var(--text);
  line-height: 1.2;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 3.6rem);
  letter-spacing: -0.035em;
}

h2 {
  margin: 0 0 18px;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 28px 0 10px;
  font-size: 1.1rem;
}

.lede {
  max-width: 780px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.intro-actions a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 0 14px;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
}

.primary-action {
  color: #ffffff;
  background: var(--navy);
  border: 1px solid var(--navy);
}

.primary-action:hover {
  color: #ffffff;
  background: var(--navy-2);
}

.secondary-action {
  color: var(--text);
  background: #ffffff;
  border: 1px solid var(--line);
}

.documentation-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 54px;
  align-items: start;
}

.contents {
  position: sticky;
  top: 82px;
  display: grid;
  gap: 7px;
  padding: 34px 0;
  font-size: 0.9rem;
}

.contents strong { margin-bottom: 5px; }

.contents a {
  padding: 3px 0;
  color: var(--muted);
  text-decoration: none;
}

.contents a:hover { color: var(--link); }

.guide {
  min-width: 0;
  max-width: 860px;
}

.guide section {
  padding: 42px 0;
  border-bottom: 1px solid var(--line);
}

.guide section:last-child { border-bottom: 0; }

.guide p,
.guide ul,
.guide ol { margin-top: 0; }

.guide li + li { margin-top: 8px; }

.steps {
  padding-left: 24px;
}

.steps > li { padding-left: 6px; }

code {
  border-radius: 4px;
  padding: 2px 5px;
  color: #25324a;
  background: #edf1f6;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  margin: 12px 0 18px;
  overflow-x: auto;
  padding: 16px;
  color: #e8edf5;
  background: var(--navy);
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  line-height: 1.55;
}

pre code {
  padding: 0;
  color: inherit;
  background: transparent;
  overflow-wrap: normal;
}

.note {
  margin: 22px 0 0;
  padding: 14px 16px;
  background: var(--surface-soft);
  border-left: 4px solid #68768d;
}

.note.warning {
  color: #65390c;
  background: var(--warning-bg);
  border-left-color: var(--warning);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 16px 0 24px;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.94rem;
}

th,
td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

th {
  color: #303a4c;
  background: var(--surface-soft);
  font-weight: 750;
}

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

.sequence-table td:first-child {
  width: 54px;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
}

.sequence-table td:nth-child(2) {
  width: 220px;
  font-weight: 700;
}

.site-footer {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 46px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.site-footer div { display: grid; }
.site-footer a { font-weight: 700; }

@media (max-width: 820px) {
  .documentation-layout {
    display: block;
  }

  .contents {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
  }

  .contents strong { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  .header-inner {
    min-height: auto;
    padding: 12px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .site-header { position: static; }

  .site-header nav {
    width: 100%;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .site-header nav a { white-space: nowrap; }

  .page-intro { padding: 36px 0 30px; }
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.5rem; }

  .contents { grid-template-columns: 1fr; }
  .contents strong { grid-column: auto; }
  .guide section { padding: 34px 0; }

  .intro-actions a { width: 100%; justify-content: center; }

  .site-footer { flex-direction: column; }
}

@media print {
  .site-header,
  .contents,
  .intro-actions,
  .site-footer,
  .skip-link { display: none; }

  .page-shell { width: 100%; }
  .documentation-layout { display: block; }
  .guide { max-width: none; }
  .guide section { break-inside: avoid; }
}