/* =============================================================================
   SilverLeaf Brief — v0 design system
   Design tokens from docs/public_ui_v0_spec.md §19.
   Fonts: Source Serif 4 (headings) + Source Sans 3 (body) with local/system
   fallbacks. No external font loading (privacy / offline / portability).
   No font binaries are committed.
   ============================================================================= */

:root {
  --bg: #F7F6F2;
  --surface: #FFFFFF;
  --text: #1F2522;
  --text-secondary: #5B6560;
  --evergreen: #235B43;
  --link: #005F73;
  --border: #D9DED9;
  --why-bg: #EDF5F0;
  --neutral-badge: #EEF1EF;
  --focus: #005F73;
  --error: #A12828;

  /* Relevance badge colors (never the only signal; always paired with text). */
  --rel-in: var(--evergreen);
  --rel-near: #7A5C2E;
  --rel-county: #44506B;

  --font-serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --font-sans: "Source Sans 3", "Source Sans Pro", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --content-max: 1120px;
  --reading-max: 760px;
  --gutter: 16px;
  --radius: 6px;
  --motion-fast: 140ms;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--text);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  line-height: 1.25;
  color: var(--text);
  font-weight: 600;
}

h1 { font-size: 1.9rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.4rem; margin: 0 0 0.5rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.35rem; }

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

p { margin: 0 0 1rem; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

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

/* ---------------------------------------------------------------------------
   Skip link
   --------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px; top: 0;
  z-index: 100;
  background: var(--surface);
  color: var(--text);
  padding: 0.75rem 1rem;
  border: 2px solid var(--focus);
  border-radius: 0 0 6px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------------------------------------------------------------------------
   Demo banner (never shown for real releases)
   --------------------------------------------------------------------------- */
.demo-banner {
  background: #FFF4D6;
  border-bottom: 2px solid #E3C06A;
  color: #4A3B0D;
  padding: 0.6rem var(--gutter);
  font-size: 0.95rem;
  text-align: center;
}

/* ---------------------------------------------------------------------------
   Header + navigation
   --------------------------------------------------------------------------- */
.site-header {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.25rem var(--gutter) 0.75rem;
}

.brand {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
}
.brand a { color: var(--evergreen); text-decoration: none; }
.brand a span { color: var(--link); }
.brand a:hover { text-decoration: underline; }

.tagline {
  margin: 0.15rem 0 0.9rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.primary-nav {
  display: flex;
  gap: 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}
.nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  padding: 0.4rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav-link:hover { color: var(--evergreen); text-decoration: underline; }
.nav-link.is-active { color: var(--evergreen); box-shadow: inset 0 -2px 0 var(--evergreen); }

main { min-height: 50vh; }

/* ---------------------------------------------------------------------------
   Page layout
   --------------------------------------------------------------------------- */
.page, .browse-page {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.5rem var(--gutter) 3rem;
}

.hero {
  padding: 1.5rem 0 1rem;
  max-width: var(--reading-max);
}
.tagline-hero {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin: 0 0 0.75rem;
}
.release-date, .item-count {
  display: inline-block;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0 0.5rem 0 0;
}
.trust {
  margin-top: 0.55rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.topic-browse {
  max-width: var(--reading-max);
  margin-top: 2rem;
}
.topic-browse h2 { margin-bottom: 0.6rem; }
.topic-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}
.topic-shortcut {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.45rem 0.85rem;
  background: var(--neutral-badge);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
}
.topic-shortcut:hover {
  border-color: var(--evergreen);
  color: var(--evergreen);
  text-decoration: underline;
}

.coverage {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  max-width: var(--reading-max);
}

/* ---------------------------------------------------------------------------
   Cards
   --------------------------------------------------------------------------- */
.release-list, .results-list, .collection-items {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: var(--reading-max);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
}
.card[hidden] { display: none; }

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.card-date {
  color: var(--evergreen);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 0 0.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--neutral-badge);
  color: var(--text);
  min-height: 26px;
}

.badge-relevance--in_silverleaf {
  background: #E7F0E9;
  border-color: #B7CFBF;
  color: #1D4A33;
}
.badge-relevance--near_silverleaf {
  background: #F4ECDD;
  border-color: #D9C39A;
  color: #5C4317;
}
.badge-relevance--countywide_impact {
  background: #E9ECF4;
  border-color: #BCC6DC;
  color: #35415E;
}
.badge-relevance::before {
  content: "";
  width: 0.55em; height: 0.55em;
  border-radius: 50%;
  background: currentColor;
}
.badge-relevance--in_silverleaf::before { background: var(--rel-in); }
.badge-relevance--near_silverleaf::before { background: var(--rel-near); }
.badge-relevance--countywide_impact::before { background: var(--rel-county); }

.badge-reviewed {
  color: var(--evergreen);
  border-color: #B7CFBF;
  background: #F0F7F1;
}
.badge-dot {
  width: 0.55em; height: 0.55em;
  border-radius: 50%;
  background: var(--evergreen);
}

.card-title a { color: var(--text); text-decoration: none; }
.card-title a:hover { color: var(--evergreen); text-decoration: underline; }

.card-summary { color: var(--text); font-size: 1rem; }

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-top: 0.8rem;
}
.action-read {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: var(--link);
  text-decoration: none;
  font-weight: 600;
}
.action-read:hover { text-decoration: underline; }

.card-source-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 36px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  text-decoration: none;
}
.card-source-link:hover { color: var(--link); text-decoration: underline; }
.card-source-link.is-unavailable { color: var(--error); cursor: not-allowed; }

.action-source {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 44px;
  color: var(--link);
  font-weight: 600;
  text-decoration: none;
}
.action-source:hover { text-decoration: underline; }
.action-source.is-unavailable {
  color: var(--error);
  cursor: not-allowed;
}
.source-list, .source-directory { padding-left: 1.25rem; }
.source-list { margin: 0; }
.external-icon { font-size: 0.9em; }

/* ---------------------------------------------------------------------------
   Browse
   --------------------------------------------------------------------------- */
.browse-header p { color: var(--text-secondary); }

.browse-search {
  display: flex;
  gap: 0.5rem;
  max-width: var(--reading-max);
  margin-bottom: 1.25rem;
}
.browse-search input {
  flex: 1;
  min-height: 46px;
  padding: 0.5rem 0.85rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}
.browse-search input:focus {
  border-color: var(--focus);
  outline: 3px solid var(--focus);
  outline-offset: 0;
}
.search-submit {
  min-height: 46px;
  padding: 0 1.1rem;
  background: var(--evergreen);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
}
.search-submit:hover { background: #1C4A36; }

.browse-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.filters-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  position: sticky;
  top: 1rem;
}

.filter-group { border: 0; margin: 0 0 1rem; padding: 0; }
.filter-group legend,
.filter-group summary {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  padding: 0;
}
.filter-group-collapsible summary {
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0.15rem 0;
  cursor: pointer;
  font-size: 0.95rem;
}
.filter-option input {
  width: 20px; height: 20px;
  accent-color: var(--evergreen);
}
.filter-count { margin-left: auto; color: var(--text-secondary); font-size: 0.85rem; }

.filters-clear, .filters-open, .sheet-apply, .sheet-close {
  min-height: 44px;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
}
.filters-clear {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 100%;
}
.filters-clear:hover { border-color: var(--error); color: var(--error); }

.results-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.9rem;
}
.result-count { margin: 0; font-weight: 600; color: var(--text-secondary); }

.active-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--neutral-badge);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-size: 0.85rem;
}
.chip button {
  border: 0; background: transparent;
  font-size: 1rem; line-height: 1;
  cursor: pointer; color: var(--text-secondary);
  padding: 0.1rem 0.2rem;
}

.filters-open { display: none; }

/* Filter sheet (mobile bottom sheet) */
.sheet-backdrop { display: none; }
.filter-sheet { display: none; }

.empty-state {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: var(--reading-max);
}
.empty-links { margin: 0; padding-left: 1.2rem; }

/* ---------------------------------------------------------------------------
   Collection pages
   --------------------------------------------------------------------------- */
.breadcrumb { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 0.5rem; }
.collection-header { margin-bottom: 1.25rem; }
.collection-count { color: var(--text-secondary); }
.collection-description { color: var(--text-secondary); max-width: var(--reading-max); }
.collection-filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0; }
.related-filter {
  font-size: 0.9rem;
  background: var(--neutral-badge);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  color: var(--text);
  text-decoration: none;
}
.related-filter:hover { color: var(--evergreen); border-color: var(--evergreen); }

/* ---------------------------------------------------------------------------
   Item detail
   --------------------------------------------------------------------------- */
.detail { max-width: var(--reading-max); }
.detail-header { margin-bottom: 1rem; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 0.6rem; }

.detail-facts {
  margin: 0.6rem 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
.detail-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
}
.detail-row dt { font-weight: 700; color: var(--text); min-width: 9rem; }
.detail-row dd { margin: 0; }

.detail-why {
  background: var(--why-bg);
  border-left: 3px solid var(--evergreen);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin: 1.25rem 0;
}
.detail-why h2 { color: var(--evergreen); }

.detail-source-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1.25rem 0;
}
.source-note { color: var(--text-secondary); font-size: 0.92rem; margin-bottom: 0; }

.detail-dim-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin: 0.5rem 0 1rem;
}
.detail-dim-grid h3 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin: 0 0 0.3rem;
}
.detail-dim-grid ul { margin: 0; padding-left: 1.1rem; }

.related { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.related-list { margin: 0; padding-left: 1.1rem; }
.related-item { margin-bottom: 0.4rem; }
.related-item-date { color: var(--text-secondary); font-size: 0.9rem; }

/* ---------------------------------------------------------------------------
   About / Sources prose
   --------------------------------------------------------------------------- */
.prose { max-width: var(--reading-max); }
.prose section { margin-bottom: 1.75rem; }

.source-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 0.75rem 0;
}
.source-table th, .source-table td {
  text-align: left;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.source-table th { background: var(--neutral-badge); font-weight: 700; }
.source-table td:nth-child(3),
.source-table th:nth-child(3) {
  text-align: right;
  white-space: nowrap;
}

.prose .detail-facts .detail-row {
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--border);
}
.prose .detail-facts .detail-row:last-child { border-bottom: 0; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: var(--neutral-badge);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

/* ---------------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------------- */
.site-footer {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 6rem;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 0.75rem;
}
.footer-nav a { color: var(--text); }
.footer-nav a:hover { color: var(--evergreen); }
.footer-release { margin: 0 0 0.35rem; }
.footer-demo { color: var(--error); font-weight: 600; }
.footer-note { margin: 0; }

/* ---------------------------------------------------------------------------
   Mobile bottom navigation
   --------------------------------------------------------------------------- */
.bottom-nav {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 0.35rem var(--gutter) calc(0.35rem + env(safe-area-inset-bottom));
}
.bottom-nav-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}
.bottom-nav-item.is-active { color: var(--evergreen); }

/* ---------------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------------- */
@media (max-width: 820px) {
  .browse-layout { grid-template-columns: 1fr; }
  .filters-panel { display: none; }
  .filters-open {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.9rem;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
  }
  .filters-open-count {
    background: var(--evergreen);
    color: #fff;
    border-radius: 999px;
    min-width: 20px;
    height: 20px;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .bottom-nav { display: flex; }
  .site-footer { padding-bottom: 6.5rem; }

  /* Bottom sheet (shown via :target without JS; JS adds focus management) */
  .sheet-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(20, 25, 22, 0.4);
    z-index: 49;
  }
  .filter-sheet {
    display: block;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 50;
    transform: translateY(105%);
    background: var(--surface);
    border-radius: 12px 12px 0 0;
    border-top: 1px solid var(--border);
    max-height: 78vh;
    overflow: auto;
    padding: 0 1rem calc(0.75rem + env(safe-area-inset-bottom));
    box-shadow: 0 -6px 24px rgba(0, 0, 0, 0.14);
    transition: transform var(--motion-fast) ease;
  }
  .filter-sheet:target { transform: translateY(0); }
  .filter-sheet.is-open { transform: translateY(0); }
  .sheet-backdrop.is-open { display: block; }

  .sheet-header {
    position: sticky;
    top: 0;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
  }
  .sheet-header h2 { margin: 0; font-size: 1.15rem; }
  .sheet-close {
    background: transparent;
    border: 0;
    color: var(--text);
  }
  .sheet-body { padding: 0.5rem 0 0.75rem; }
  .sheet-footer {
    display: flex;
    gap: 0.6rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
  }
  .sheet-footer .filters-clear { flex: 1; }
  .sheet-apply { flex: 2; background: var(--evergreen); color: #fff; border: 0; }
  .sheet-apply:hover { background: #1C4A36; }
}

@media (max-width: 340px) {
  :root { --gutter: 12px; }
  .card-actions { flex-direction: column; align-items: stretch; }
  .action-read, .action-source { justify-content: center; }
}

/* ---------------------------------------------------------------------------
   Reduced motion
   --------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}