:root {
  color-scheme: light;
  --bg: #f7f6f3;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --ink: #1a1a1a;
  --muted: #7a7770;
  --line: #e2e0db;
  --primary: #d01012;
  --primary-hover: #b00e10;
  --primary-tint: rgba(208, 16, 18, 0.06);
  --ok: #00852b;
  --warn: #4a3300;
  --warn-bg: rgba(255, 213, 0, 0.1);
  --warn-border: rgba(255, 213, 0, 0.5);
  --info: #003a8c;
  --info-bg: rgba(0, 85, 191, 0.06);
  --info-border: rgba(0, 85, 191, 0.4);
  --error: #5c0708;
  --error-bg: rgba(208, 16, 18, 0.06);
  --error-border: rgba(208, 16, 18, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand small {
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

.site-nav a {
  padding: 8px 14px;
  text-decoration: none;
  color: var(--muted);
  border: 1px solid transparent;
  background: transparent;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.12s ease, background 0.12s ease;
}

.site-nav a:hover {
  color: var(--ink);
  background: var(--surface);
}

.site-nav a[aria-current="page"] {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  background: transparent;
}

.layout-with-sidebar {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.section-sidebar {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 16px 14px 18px;
  position: sticky;
  top: 16px;
}

.section-sidebar-kicker {
  margin: 0 0 10px;
  padding: 0 4px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.section-sidebar nav {
  display: flex;
  flex-direction: column;
}

.section-sidebar-group {
  margin: 14px 0 4px;
  padding: 0 10px;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.section-sidebar nav > .section-sidebar-group:first-child {
  margin-top: 0;
  border-top: 0;
  padding-top: 0;
}

.section-sidebar nav a {
  display: block;
  padding: 7px 10px;
  font-size: 0.86rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.12s ease, background 0.12s ease;
}

.section-sidebar nav a:hover {
  color: var(--ink);
  background: var(--bg);
}

.section-sidebar nav a[aria-current="page"] {
  color: var(--primary);
  background: var(--primary-tint);
  font-weight: 600;
}

.content {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 28px 30px 32px;
  min-width: 0;
}

.kicker {
  margin: 0 0 12px;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.page-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 14px;
}

.page-title-row h1 {
  margin: 0;
}

.page-type-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.page-meta {
  margin: 2.4rem 0 0;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  background: var(--bg);
}

.page-meta dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px 24px;
  margin: 0;
}

.page-meta div {
  display: flex;
  flex-direction: column;
}

.page-meta dt {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 4px;
}

.page-meta dd {
  margin: 0;
  font-size: 0.86rem;
  color: var(--ink);
  font-weight: 500;
}

.lede {
  max-width: 72ch;
  font-size: 1.02rem;
  color: var(--muted);
  line-height: 1.6;
}

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

h1 {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  margin: 0 0 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h2 {
  margin-top: 2.2rem;
  margin-bottom: 0.8rem;
  font-size: 1.35rem;
  font-weight: 600;
}

h3 {
  margin-top: 1.6rem;
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

p,
li {
  line-height: 1.65;
  font-size: 0.95rem;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

code,
pre {
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
}

code {
  background: rgba(26, 26, 26, 0.06);
  padding: 0.08rem 0.32rem;
  font-size: 0.86em;
}

pre {
  background: #1a1a1a;
  color: #f5f4f1;
  padding: 14px 16px;
  overflow-x: auto;
  border: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.55;
}

pre code {
  background: transparent;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

blockquote {
  margin: 1.2rem 0;
  padding: 12px 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  background: var(--surface);
  border: 1px solid var(--line);
  display: block;
  overflow-x: auto;
}

thead {
  background: #f1efe9;
}

th,
td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  min-width: 140px;
  font-size: 0.9rem;
}

th {
  font-weight: 600;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.callout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 1.3rem 0 1.7rem;
}

.callout {
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.callout strong a {
  text-decoration: none;
}

.callout p {
  margin: 6px 0 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.55;
}

.site-footer {
  padding: 20px 4px 0;
  color: var(--muted);
  font-size: 0.84rem;
}

/* ─── Style guide swatches ─── */

.sg-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 1rem 0 1.6rem;
}

.sg-swatch {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 12px 14px;
}

.sg-swatch-chip {
  display: block;
  width: 100%;
  height: 48px;
  border: 1px solid var(--line);
  margin-bottom: 10px;
}

.sg-swatch-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
}

.sg-swatch-value {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  color: var(--muted);
  margin-top: 2px;
}

.sg-swatch-usage {
  font-size: 0.74rem;
  color: var(--muted);
  margin-top: 6px;
  line-height: 1.45;
}

@media (max-width: 880px) {
  .layout-with-sidebar {
    grid-template-columns: 1fr;
  }

  .section-sidebar {
    position: static;
  }

  .section-sidebar nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 2px;
  }

  .section-sidebar nav a {
    flex: 0 0 auto;
  }
}

@media (max-width: 740px) {
  .content {
    padding: 22px 18px 26px;
  }
}