.lab-main { display: grid; gap: 32px; }
.lab-home-header { max-width: 760px; }
.lab-home-header .lead { max-width: 48ch; font-size: 1.02rem; }
.lab-toolbar { display: flex; flex-wrap: wrap; gap: 12px 20px; margin-top: 20px; }
.lab-toolbar a, .lab-external { color: var(--muted); font-weight: 700; text-underline-offset: .18em; }
.lab-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.lab-primary-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.lab-card { background: var(--paper); min-width: 0; }
.lab-card a { min-height: 180px; padding: 22px; display: grid; align-content: start; gap: 8px; text-decoration: none; }
.lab-card a:hover h2 { text-decoration: underline; text-underline-offset: .16em; }
.lab-card h2 { font-size: clamp(1.2rem, 2.6vw, 1.6rem); letter-spacing: -.025em; }
.lab-card p:not(.lab-kicker):not(.lab-subtitle):not(.lab-muted) { color: var(--muted); line-height: 1.6; }
.lab-kicker, .lab-section-label { color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.lab-subtitle, .lab-muted { color: var(--muted); font-size: .86rem; }
.lab-section { display: grid; gap: 14px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.lab-section h2 { font-size: clamp(1.2rem, 3vw, 1.8rem); letter-spacing: -.03em; }
.lab-section-copy { max-width: 66ch; color: var(--muted); line-height: 1.72; }
.lab-definition { max-width: 68ch; font-size: clamp(1.08rem, 2vw, 1.3rem); line-height: 1.82; }
.lab-general, .lab-reading-section { max-width: 76ch; }
.lab-general { padding-top: 4px; }
.lab-list, .lab-search-list, .lab-text-list { list-style: none; padding: 0; margin: 0; }
.lab-list { display: grid; border-top: 1px solid var(--line); }
.lab-list li { border-bottom: 1px solid var(--line); }
.lab-list a { display: grid; grid-template-columns: minmax(110px, .34fr) minmax(0, 1fr); gap: 16px; padding: 14px 0; text-decoration: none; }
.lab-list a:hover strong { text-decoration: underline; text-underline-offset: .16em; }
.lab-list span { color: var(--muted); font-size: .78rem; line-height: 1.45; }
.lab-text-list { max-width: 68ch; display: grid; gap: 10px; }
.lab-text-list li { padding-left: 1.15em; position: relative; line-height: 1.75; }
.lab-text-list li::before { content: "—"; position: absolute; left: 0; color: var(--muted); }
.lab-search-controls { display: grid; grid-template-columns: minmax(0, 1fr) minmax(160px, .3fr); gap: 12px; }
.lab-search-controls label { display: grid; gap: 6px; color: var(--muted); font-size: .8rem; font-weight: 700; }
.lab-search-controls input, .lab-search-controls select { width: 100%; padding: 12px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); font: inherit; }
.lab-result-count { color: var(--muted); }
.lab-search-list { border-top: 1px solid var(--line); }
.lab-search-row { border-bottom: 1px solid var(--line); }
.lab-search-row a { display: grid; grid-template-columns: 90px minmax(180px, .5fr) minmax(0, 1fr); gap: 14px; padding: 14px 0; text-decoration: none; align-items: baseline; }
.lab-search-row span, .lab-search-row small { color: var(--muted); }
.lab-search-row span { font-size: .76rem; font-weight: 800; }
.lab-search-row small { line-height: 1.45; }
.lab-search-row a:hover strong { text-decoration: underline; text-underline-offset: .16em; }

@media (max-width: 900px) {
  .lab-primary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .lab-main { gap: 24px; }
  .lab-section { padding: 22px 0; }
  .lab-primary-grid, .lab-search-controls { grid-template-columns: 1fr; }
  .lab-list a, .lab-search-row a { grid-template-columns: 1fr; gap: 5px; }
  .lab-card a { min-height: 0; }
}