:root {
  --ink: #202124;
  --muted: #5f6368;
  --line: #dadce0;
  --soft: #f8f9fa;
  --accent: #8a1538;
  --blue: #245b8e;
  --teal: #0b6b57;
  --amber: #9a5b00;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--blue);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover,
a:focus {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
}

.brand {
  color: var(--ink);
  font-weight: 720;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  font-size: 0.94rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 34px 20px 56px;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 28px;
  align-items: center;
  padding: 18px 0 12px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin: 44px 0 14px;
  font-size: 1.55rem;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  letter-spacing: 0;
}

p {
  margin: 0 0 14px;
}

h1,
h2,
h3,
p,
li {
  overflow-wrap: anywhere;
}

.lead {
  max-width: 820px;
  color: #2c394d;
  font-size: 1.12rem;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.meta li,
.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  background: var(--soft);
  color: var(--muted);
  font-size: 0.9rem;
}

.featured-document,
.card,
.session,
.detail-panel {
  background: var(--white);
}

.featured-document {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  border-left: 3px solid var(--accent);
  padding: 8px 0 8px 16px;
  color: var(--ink);
  text-decoration: none;
}

.featured-document img {
  width: 92px;
  aspect-ratio: 1 / 1.35;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
}

.featured-document strong,
.featured-document small {
  display: block;
}

.featured-document small {
  margin-top: 3px;
  color: var(--muted);
}

.section-heading {
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.section-heading h2 {
  margin-top: 0;
  margin-bottom: 13px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  border-top: 1px solid var(--line);
  padding: 18px 0 0;
}

.card img {
  width: 100%;
  height: 170px;
  margin-bottom: 14px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--line);
  background: #fff;
}

.card.horizontal {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.card.horizontal img {
  height: 162px;
  margin-bottom: 0;
}

.session-list {
  display: grid;
  gap: 0;
}

.session {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 16px;
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.session > img {
  width: 132px;
  height: 168px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--line);
  background: #fff;
}

.session-header {
  display: flex;
  gap: 12px;
  align-items: baseline;
  justify-content: space-between;
}

.session-number {
  color: var(--teal);
  font-weight: 760;
  white-space: nowrap;
}

.link-row,
.pager {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.resource-link,
.pager a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 5px 10px;
  background: var(--white);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.94rem;
}

.resource-link:hover,
.resource-link:focus,
.pager a:hover,
.pager a:focus {
  border-color: var(--blue);
  color: var(--blue);
}

.td-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 34px;
  align-items: start;
}

.td-preview {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
}

.detail-panel {
  border-left: 1px solid var(--line);
  padding: 0 0 0 18px;
}

.plain-list {
  margin: 8px 0 16px;
  padding-left: 1.2rem;
}

.plain-list li {
  margin: 7px 0;
}

.callout {
  margin: 18px 0;
  border-left: 4px solid var(--teal);
  padding: 8px 0 8px 14px;
  background: transparent;
}

.setup {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.role-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin: 22px 0;
  padding: 0;
}

.role-list div,
.setup-columns article {
  border-top: 1px solid var(--line);
  padding-top: 13px;
}

.role-list dt {
  margin-bottom: 4px;
  color: var(--ink);
  font-weight: 720;
}

.role-list dd {
  margin: 0;
  color: var(--muted);
}

.setup-note {
  max-width: 860px;
  border-left: 4px solid var(--accent);
  padding: 8px 0 8px 14px;
  color: #2c394d;
}

.setup-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
  margin: 28px 0 8px;
}

.setup-columns ol,
.setup-check ol,
.setup-help ul {
  padding-left: 1.25rem;
}

.setup-columns li,
.setup-check li,
.setup-help li {
  margin: 7px 0;
}

.setup-check,
.setup-help {
  max-width: 860px;
  border-top: 1px solid var(--line);
  margin-top: 30px;
  padding-top: 16px;
}

pre {
  overflow-x: auto;
  border-left: 4px solid var(--blue);
  margin: 12px 0 16px;
  padding: 10px 14px;
  background: var(--soft);
}

pre code {
  display: block;
  padding: 0;
  background: transparent;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 22px 20px 36px;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  font-size: 0.92rem;
}

code {
  border-radius: 4px;
  padding: 0.08rem 0.24rem;
  background: #eef2f7;
  color: #223047;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.94em;
}

@media (max-width: 860px) {
  .nav,
  .intro,
  .td-layout,
  .role-list,
  .setup-columns,
  .session,
  .card.horizontal {
    grid-template-columns: 1fr;
  }

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

  .nav-links {
    justify-content: flex-start;
  }

  .grid,
  .grid.two {
    grid-template-columns: 1fr;
  }

  .featured-document {
    max-width: 420px;
  }

  .session > img,
  .card.horizontal img {
    width: 100%;
    height: 210px;
  }

  .session-header {
    display: block;
  }

  .detail-panel {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 18px 0 0;
  }
}