:root {
  --content-width: 1180px;
  --reading-width: 720px;
  --page-gutter: 16px;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 0;
}

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  inset-block-start: 8px;
  inset-inline-start: 8px;
  z-index: 20;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.header-core {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  width: min(100%, var(--content-width));
  margin-inline: auto;
  padding: 8px var(--page-gutter);
}

.guide-mark {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.split-navigation {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.header-link-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
}

.header-group-label {
  padding-inline: 8px 4px;
}

.header-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 10px;
}

.filter-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: min(100%, var(--content-width));
  margin-inline: auto;
  padding: 8px var(--page-gutter) 10px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
}

.handbook-main {
  width: min(100%, var(--content-width));
  margin-inline: auto;
}

.chapter-shell {
  padding: 0 var(--page-gutter) 56px;
}

.chapter-visual {
  position: relative;
  margin: 0 calc(var(--page-gutter) * -1);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.chapter-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-tag,
.duration-tag {
  position: absolute;
  inset-inline-end: 8px;
  inset-block-end: 8px;
}

.chapter-heading {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  max-width: var(--reading-width);
  margin: 14px auto 28px;
}

.chapter-avatar,
.feed-avatar {
  display: block;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
}

.chapter-eyebrow,
.chapter-meta {
  margin: 0;
}

.chapter-heading h1 {
  margin: 2px 0 4px;
}

.chapter-summary,
.chapter-section {
  max-width: var(--reading-width);
  margin: 0 auto;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.chapter-section:has(.chapter-feed) {
  max-width: none;
}

.chapter-summary h2,
.chapter-section h2 {
  margin: 0 0 16px;
}

.chapter-summary p,
.chapter-section p {
  margin: 0 0 16px;
}

.plain-list,
.question-prompts {
  margin: 0;
  padding-inline-start: 24px;
}

.plain-list li,
.question-prompts li {
  margin: 0 0 12px;
  padding-inline-start: 4px;
}

.question-prompts {
  list-style: none;
  padding: 0;
}

.question-prompts li {
  padding: 12px 0 12px 36px;
  min-height: 48px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.question-prompts li::before {
  content: '?';
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 11px;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
}

.chapter-feed {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.feed-item {
  display: block;
  min-width: 0;
}

.feed-image-frame {
  display: block;
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.feed-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feed-copy {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 84px;
  padding: 10px 0;
}

.feed-details,
.feed-title,
.feed-meta {
  display: block;
  min-width: 0;
}

.feed-title {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.feed-meta {
  margin-top: 4px;
}

.source-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.source-cards {
  display: grid;
  gap: 8px;
}

.source-card {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px;
}

.source-card small {
  flex: 0 0 auto;
}

.provider-checklist fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.checklist-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.checklist-row input {
  width: 40px;
  height: 40px;
  margin: 0;
}

.checklist-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.selection-count,
.secondary-action,
.commit-action,
.return-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
}

.save-status {
  min-height: 44px;
  padding-top: 12px;
}

.chapter-step-links {
  display: grid;
  grid-template-columns: 1fr;
  max-width: var(--reading-width);
  margin: 16px auto 0;
  border-top: 1px solid var(--line);
}

.chapter-step-links a {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 88px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.site-footer {
  width: min(100%, var(--content-width));
  margin-inline: auto;
  padding: 24px var(--page-gutter) 40px;
  border-top: 1px solid var(--line);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.site-footer p {
  max-width: var(--reading-width);
  margin: 14px 0 0;
}

.not-found-shell {
  max-width: var(--reading-width);
  min-height: 52vh;
  margin-inline: auto;
  padding: 72px var(--page-gutter);
}

.not-found-shell h1 {
  margin: 4px 0 12px;
}

.return-action {
  margin-top: 16px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (min-width: 700px) {
  :root {
    --page-gutter: 24px;
  }

  .chapter-shell {
    padding-top: 24px;
  }

  .chapter-visual {
    margin-inline: 0;
  }

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

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

  .chapter-step-links a:first-child {
    padding-inline-end: 20px;
    border-inline-end: 1px solid var(--line);
  }

  .chapter-step-links a:last-child {
    padding-inline-start: 20px;
  }
}

@media (min-width: 1080px) {
  .chapter-feed {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 699px) {
  .header-core {
    align-items: flex-start;
  }

  .guide-mark {
    width: 100%;
  }

  .split-navigation {
    width: 100%;
    justify-content: space-between;
  }

  .header-group-label {
    display: none;
  }

  .header-link {
    padding-inline: 8px;
  }

  .filter-rail {
    gap: 6px;
  }

  .filter-chip {
    flex: 1 1 auto;
    padding-inline: 12px;
  }

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