:root {
  --bg: #fdfcf9;
  --fg: #1c1a17;
  --muted: #6b6459;
  --accent: #7a3b2e;
  --card-bg: #ffffff;
  --border: #e6e1d8;
  --radius: 10px;
  --max-width: 960px;
  font-family: -apple-system, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17150f;
    --fg: #ece7dd;
    --muted: #a49a8a;
    --accent: #d9997f;
    --card-bg: #221f18;
    --border: #332f26;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.site-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}

.site-header nav a {
  margin-left: 1.25rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-header nav a:hover { color: var(--accent); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem 4rem;
}

.hero {
  padding: 2rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.hero h1 { font-size: 2.25rem; margin: 0 0 0.5rem; }
.hero p { color: var(--muted); margin: 0; }

section { margin-bottom: 3rem; }
section h2 { font-size: 1.4rem; margin-bottom: 1rem; }

.group { margin-bottom: 3rem; }

.group-label {
  cursor: pointer;
  list-style: none;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 1.25rem;
}

.group-label::-webkit-details-marker { display: none; }

.group-label::before {
  content: "▾";
  display: inline-block;
  margin-right: 0.4rem;
  color: var(--accent);
}

.group[open] > .group-label::before { content: "▾"; }
.group:not([open]) > .group-label::before { content: "▸"; }

.group-body { padding-left: 0.25rem; border-left: 2px solid var(--border); padding-left: 1rem; }

.collection { margin-bottom: 2rem; }

.collection-label {
  cursor: pointer;
  list-style: none;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.collection-label::-webkit-details-marker { display: none; }

.collection-label::before {
  content: "▸";
  display: inline-block;
  margin-right: 0.4rem;
  transition: transform 0.15s ease;
}

.collection[open] > .collection-label::before { transform: rotate(90deg); }

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  align-items: start;
}

.tile {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem;
}

.tile > summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.6rem;
}

.tile > summary::-webkit-details-marker { display: none; }

.tile > summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 0.4rem;
  font-weight: 400;
  color: var(--muted);
  transition: transform 0.15s ease;
}

.tile[open] > summary::before { transform: rotate(90deg); }

.tool-group {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 0.25rem;
  margin-bottom: 1.5rem;
}

.tool-group h3 { margin: 0 0 0.9rem; font-size: 1.05rem; }
.tool-group .source-list { margin-top: 0.9rem; }
.tool-group .collection { margin: 1rem 0 0.75rem; }

.source-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.source-item { line-height: 1.45; }

.source-item a {
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
}

.source-item a:hover { color: var(--accent); }

.source-kind {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.7rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  margin-right: 0.4rem;
  vertical-align: 0.1em;
}

.source-description { color: var(--muted); font-size: 0.9rem; margin-left: 0.35rem; }
.source-description::before { content: "— "; }

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  margin: 0 0 0.75rem;
}

.tags li {
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
}

.btn {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  color: var(--fg);
  text-decoration: none;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover { opacity: 0.9; color: #fff; }

.document-page h1 { margin-bottom: 0.25rem; }
.doc-description { color: var(--muted); margin-top: 0; }
.downloads { display: flex; gap: 0.5rem; margin: 0.75rem 0 0; flex-wrap: wrap; }

.pdf-viewer {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  height: 42vh;
}

.pdf-viewer embed { width: 100%; height: 100%; border: none; }

.variant { margin-bottom: 1.75rem; }
.variant:last-child { margin-bottom: 0; }
.variant-label { font-size: 0.9rem; color: var(--muted); margin: 0 0 0.5rem; }

.document-page .pdf-viewer { height: 80vh; }

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.edition-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.edition-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  color: var(--fg);
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.edition-card:hover { border-color: var(--accent); }

.edition-title-he {
  font-family: "SBL Hebrew", "Taamey Frank CLM", "Times New Roman", serif;
  font-size: 1.35rem;
  color: var(--accent);
  margin: 0;
}

.edition-title { font-weight: 600; }
.edition-description { font-size: 0.9rem; color: var(--muted); }

.status {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.05rem 0.5rem;
  margin-left: 0.3rem;
  white-space: nowrap;
}

.section-more { margin-top: 1rem; font-size: 0.9rem; }
.section-more a { color: var(--accent); text-decoration: none; }
.edition-links { margin: 0 0 1.75rem; }

.date {
  font-size: 0.8em;
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.35rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.subhead {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
  margin: 1.5rem 0 0.9rem;
}