:root{--sl-ink:#1a2737;--sl-muted:#56667a;--sl-line:#d8e0e8;--sl-paper:#fff;--sl-rail:#f3f6f8;--sl-accent:#284766}
*{box-sizing:border-box}body{margin:0;background:#f9fafb;color:var(--sl-ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.source-layout{display:grid;grid-template-columns:minmax(240px,295px) minmax(0,1fr);min-height:calc(100vh - 82px);border-top:1px solid var(--sl-line)}
.source-rail{background:var(--sl-rail);border-right:1px solid var(--sl-line);padding:23px 19px 36px;min-width:0}
.source-back{font-size:13px;font-weight:600;text-decoration:none;color:var(--sl-accent);display:block;margin-bottom:32px}
.source-rail-heading small,.source-eyebrow{letter-spacing:.11em;font-size:10px;font-weight:800;color:#64768a;text-transform:uppercase}
.source-rail-heading h1{font-size:25px;line-height:1.2;letter-spacing:-.04em;margin:9px 0}
.source-rail-heading p,.source-rail-note{line-height:1.5;font-size:13px;color:var(--sl-muted);margin:6px 0 15px}
.source-health{font-size:12px;line-height:1.55;padding:12px;background:#e9eff4;border-radius:7px;margin:15px 0 22px;overflow-wrap:anywhere}
#source-list{display:grid;gap:6px}
.source-choice{display:block;text-align:left;width:100%;border:1px solid transparent;background:transparent;color:var(--sl-ink);padding:12px 11px;border-radius:7px;cursor:pointer}
.source-choice:hover{background:#fff;border-color:#cdd7e1}
.source-choice[aria-current="true"]{background:#fff;border-color:#7a91aa;box-shadow:inset 3px 0 var(--sl-accent)}
.source-choice strong{display:block;font-size:13px;line-height:1.4}
.source-choice small{display:block;margin-top:5px;color:var(--sl-muted);font-size:11px;line-height:1.4}
.source-rail-note{border-top:1px solid var(--sl-line);padding-top:16px;margin-top:28px}
.source-main{padding:33px min(4vw,50px) 60px;min-width:0;max-width:1700px;width:100%;margin:0 auto}
.source-hero{padding-bottom:22px;border-bottom:1px solid var(--sl-line)}
.source-hero h2{font-size:clamp(27px,3vw,41px);font-weight:700;letter-spacing:-.045em;line-height:1.12;margin:11px 0}
.source-hero>p{max-width:800px;line-height:1.6;font-size:14px;color:var(--sl-muted);margin:0 0 17px}
.source-meta{display:flex;flex-wrap:wrap;gap:8px}
.source-meta span{background:#edf2f6;border-radius:3px;font-size:11px;font-weight:600;padding:6px 9px}
.source-toolbar{display:grid;grid-template-columns:repeat(4,minmax(130px,1fr));gap:12px;padding:25px 0 14px}
.source-toolbar label{font-size:12px;font-weight:700;display:grid;gap:8px}
.source-toolbar select,.source-toolbar input{min-width:0;width:100%;height:39px;background:#fff;border:1px solid #c6d1db;color:var(--sl-ink);border-radius:5px;padding:0 9px;font:inherit;font-weight:400;font-size:13px}
.source-toolbar select:focus-visible,.source-toolbar input:focus-visible,.source-choice:focus-visible,.source-pager button:focus-visible,#source-download:focus-visible{outline:3px solid #6295be;outline-offset:2px}
.source-status{min-height:28px;font-size:12px;color:var(--sl-muted);line-height:1.6}
.source-chart-card,.source-table-card,.source-provenance{background:var(--sl-paper);border:1px solid var(--sl-line);border-radius:8px;margin-top:20px;padding:18px 18px 16px}
.source-section-head{display:flex;align-items:start;justify-content:space-between;gap:16px;margin-bottom:16px}
.source-section-head h3,.source-provenance h3{font-size:16px;margin:0 0 5px}
.source-section-head p{font-size:12px;color:var(--sl-muted);margin:0;line-height:1.5}
.source-chart{min-height:240px;display:flex;align-items:center;justify-content:center;width:100%;font-size:13px;color:var(--sl-muted)}
.source-chart svg{display:block;width:100%;height:auto;max-height:335px}
.source-column-controls{display:flex;flex-wrap:wrap;align-items:center;gap:9px 12px;margin:8px 0 14px;font-size:12px}
.source-column-controls label{display:flex;align-items:center;gap:8px;font-weight:600}
.source-column-controls input{font:inherit;padding:9px;min-width:140px;max-width:250px;border-radius:5px;border:1px solid #c6d1db}
.source-column-controls button{font:inherit;font-weight:650;border:1px solid #becbd7;border-radius:5px;padding:9px 12px;background:white;color:var(--sl-accent);cursor:pointer}
.source-column-controls button:disabled{opacity:.46;cursor:default}
.source-column-controls button:focus-visible,.source-column-controls input:focus-visible,.source-table-scroll:focus-visible{outline:3px solid #6295be;outline-offset:2px}
#source-columns-status{flex:1;min-width:180px;color:var(--sl-muted);line-height:1.5}
.source-table-scroll{overflow:auto;max-width:100%;max-height:590px}
.source-table-scroll table{border-collapse:collapse;font-size:12px;width:100%;white-space:nowrap}
.source-table-scroll th{position:sticky;top:0;background:#f0f4f8;text-align:left;font-weight:750;padding:10px 12px;border-bottom:1px solid #d5dfe7}
.source-table-scroll td{padding:9px 12px;border-bottom:1px solid #edf1f5;max-width:360px;overflow:hidden;text-overflow:ellipsis}
.source-table-scroll tbody tr:hover{background:#f6f9fb}
.source-pager{display:flex;gap:13px;align-items:center;justify-content:end;margin-top:13px;font-size:12px}
.source-pager button,#source-download{font:inherit;font-size:12px;font-weight:650;padding:9px 12px;border-radius:5px;border:1px solid #becbd7;background:white;cursor:pointer;color:var(--sl-accent)}
.source-pager button:disabled,#source-download:disabled{opacity:.46;cursor:default}
.source-provenance{font-size:12px;line-height:1.65;color:var(--sl-muted);overflow-wrap:anywhere}
.source-provenance a{color:var(--sl-accent);font-weight:650}
.source-provenance h3{color:var(--sl-ink)}
.source-loading{font-style:italic}
@media(max-width:1050px){.source-toolbar{grid-template-columns:repeat(2,minmax(0,1fr))}.source-main{padding:25px}}
@media(max-width:700px){.source-layout{display:block}.source-rail{border-right:0;border-bottom:1px solid var(--sl-line);padding:16px}.source-rail-heading h1{font-size:22px}.source-back{margin-bottom:14px}.source-rail-note{display:none}#source-list{display:flex;overflow-x:auto;gap:6px;padding-bottom:6px}.source-choice{min-width:185px;max-width:230px;flex:none}.source-main{padding:22px 14px 40px}.source-chart-card,.source-table-card,.source-provenance{padding:14px}.source-toolbar{gap:10px}.source-section-head{display:block}#source-download{margin-top:12px}}
@media(max-width:360px){.source-toolbar{grid-template-columns:1fr}.source-column-controls label{width:100%}.source-column-controls input{max-width:none;flex:1}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* DATA-19: bounded catalog navigation distinct from the 60-row observation pager. */
.source-catalog-pager{display:flex;flex-wrap:wrap;gap:.45rem;align-items:center;justify-content:space-between;
 padding:.7rem .25rem;font-size:.76rem;line-height:1.4;border-bottom:1px solid var(--line,#d8e0e8)}
.source-catalog-pager button{border:1px solid var(--line,#cbd5e1);border-radius:.35rem;
 padding:.35rem .55rem;background:var(--surface,#fff);color:inherit;cursor:pointer}
.source-catalog-pager button:disabled{cursor:default;opacity:.45}
.source-catalog-pager span{flex:1;min-width:6rem;text-align:center}