.structure-lab{--st-ink:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:16px;overflow:hidden}.st-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:30px 30px 24px;border-bottom:1px solid var(--line)}.st-heading h2{font-size:36px;line-height:1.1;margin:8px 0 14px}.st-heading>div>p:last-child{max-width:590px;font-size:12px;line-height:1.8}.st-provenance-badge{display:inline-block;border:1px solid var(--line);border-radius:30px;padding:7px 12px;white-space:nowrap;font:9px var(--mono);color:var(--mint)}.st-workspace{display:grid;grid-template-columns:minmax(0,1fr) 270px}.st-main{min-width:0}.st-record-picker{display:flex;gap:15px;align-items:center;padding:20px 24px 15px}.st-record-picker label{font-size:11px;white-space:nowrap;color:var(--muted)}.st-record-picker select{min-width:0;width:100%;font-size:11px}.st-toolbar{display:flex;gap:7px;align-items:center;flex-wrap:wrap;padding:0 24px 16px}.st-toolbar button,.st-view-row button{font-size:10px;padding:7px 10px;border:1px solid var(--line);border-radius:5px;color:var(--muted)}.st-toolbar button[aria-pressed=true],.st-toolbar button:hover,.st-view-row button:hover{background:var(--panel2);color:var(--mint);border-color:var(--mint)}.st-segments{display:flex;margin-right:auto}.st-segments button{border-radius:0}.st-segments button:first-child{border-radius:5px 0 0 5px}.st-segments button:last-child{border-radius:0 5px 5px 0}.st-canvas-wrap{position:relative;height:500px;background:var(--bg);border-block:1px solid var(--line)}.st-canvas-wrap canvas{height:100%;width:100%}.st-canvas-caption{position:absolute;bottom:14px;left:20px;right:20px;display:flex;justify-content:space-between;gap:20px;pointer-events:none;font:9px var(--mono);color:var(--muted)}.st-canvas-caption span{background:var(--panel);padding:5px 7px;border-radius:3px}.st-view-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap;padding:15px 24px}.st-view-row>span{font-size:10px;color:var(--soft);margin-right:6px}.st-layer-controls{display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:15px;padding:2px 24px 10px}.st-layer-controls label{font-size:10px;color:var(--muted);display:block}.st-layer-controls select{display:block;width:100%;min-width:0;margin-top:6px;font-size:10px;padding:8px}.st-explode output{float:right;font:9px var(--mono)}.st-explode input{margin-top:13px}.st-layer-note{font-size:10px;line-height:1.8;padding:0 24px 14px;min-height:50px}.st-residue-details{margin:0 24px;border-top:1px solid var(--line);padding-top:12px}.st-residue-details>summary{font-size:11px;color:var(--mint);cursor:pointer}.st-residue-details select{margin-top:12px;width:100%;font-size:11px}.st-selection{padding-top:12px}.st-selection strong{font-size:12px}.st-selection p{font-size:11px;line-height:1.7;margin:6px 0}.st-key{display:flex;gap:12px;flex-wrap:wrap;padding:18px 24px 22px}.st-notes{padding:24px;border-left:1px solid var(--line);background:var(--panel2)}.st-notes h3{font:400 24px/1.2 var(--serif);letter-spacing:-.035em;margin:4px 0 15px}.st-notes ol{padding-left:18px;color:var(--muted);font-size:11px;line-height:1.8}.st-notes li{margin-bottom:13px}.st-boundary{font-size:10px!important;line-height:1.8;border-left:2px solid var(--gold);padding-left:11px;margin:18px 0;color:var(--muted)}.st-record-summary{border-top:1px solid var(--line);padding-top:22px;margin-top:18px}.st-record-summary>p{font-size:11px;line-height:1.8}.st-record-summary>a{font-size:10px}.st-record-facts{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}.st-record-facts span{padding:3px 6px;border:1px solid var(--line);font:8px var(--mono);color:var(--muted);border-radius:3px}.st-provenance{padding:20px 30px;border-top:1px solid var(--line)}.st-provenance summary{font-size:11px;color:var(--mint);cursor:pointer}.st-provenance p,.st-provenance dl{font-size:11px;line-height:1.8;max-width:1000px;margin-top:14px;color:var(--muted)}.st-provenance dt{font-weight:600;color:var(--text);margin-top:12px}.st-provenance dd{margin:3px 0 0}.structure-lab button:focus-visible,.structure-lab summary:focus-visible{outline:2px solid var(--mint);outline-offset:3px}.topology-reading-tools{margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}.topology-reading-tools>p{font-size:10px}.topology-reading-tools>div{display:flex;gap:7px;flex-wrap:wrap;margin-top:8px}.topology-reading-tools button{border:1px solid var(--line);border-radius:4px;padding:7px 9px;font-size:10px;color:var(--mint)}.topology-reading-tools .open-experimental{display:block;width:100%;margin-top:10px;text-align:left;background:var(--panel2);padding:11px}
@media(max-width:1100px){.st-workspace{grid-template-columns:minmax(0,1fr) 230px}.st-notes{padding:20px}.st-layer-controls{grid-template-columns:1fr 1fr}.st-explode{grid-column:1/-1}.st-explode input{margin-top:5px}.st-canvas-wrap{height:450px}.st-provenance-badge{display:none}}
@media(max-width:760px){.st-workspace{display:block}.st-heading{padding:24px}.st-heading h2{font-size:31px}.st-record-picker{display:block;padding:18px}.st-record-picker label{display:block;margin-bottom:7px}.st-toolbar{padding-inline:18px}.st-canvas-wrap{height:430px}.st-canvas-caption{font-size:8px;left:10px;right:10px;gap:6px}.st-notes{border-left:0;border-top:1px solid var(--line);padding:24px}.st-layer-controls{padding-inline:18px}.st-layer-note{padding-inline:18px}.st-view-row{padding-inline:18px}.st-provenance{padding:20px 24px}.st-segments{width:100%;margin-bottom:4px}.st-segments button{flex:1}.st-key .nucleotide-chip span{font-size:9px}.st-provenance dd{overflow-wrap:anywhere}}
.st-toolbar button[hidden]{display:none}.st-atom-key{font-size:10px;line-height:1.8;margin:0;padding:0 24px 16px;color:var(--soft)}.st-atom-key[hidden]{display:none}
.st-atom-key{border-top:1px solid var(--line);margin:0 24px 14px;padding:14px 0 0}.st-atom-key>strong{font-size:11px;color:var(--text)}.st-atom-key p{margin:7px 0}.st-element-key{display:flex;gap:8px 18px;flex-wrap:wrap;margin:10px 0}.st-element-key>span{display:inline-flex;align-items:center;gap:5px;white-space:nowrap}.st-element-key i,.st-atom-inventory i{width:10px;height:10px;flex:0 0 10px;background:var(--atom-color);border-radius:50%;border:1px solid #62717b;display:inline-block}.st-water-note{font-size:10px;line-height:1.8;color:var(--muted);padding:0 24px 14px;margin:0}.st-nucleotide-guide{padding:12px;border-left:2px solid var(--mint);background:var(--panel2)}.st-atom-inventory{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:12px 0}.st-atom-inventory section{min-width:0;border:1px solid var(--line);border-radius:6px;padding:10px}.st-atom-inventory h4{font-size:11px;color:var(--text);margin:0 0 8px}.st-atom-inventory section>div{display:flex;flex-wrap:wrap;gap:5px}.st-atom-inventory button{display:flex;align-items:center;gap:5px;padding:6px;border:1px solid var(--line);border-radius:4px;font:10px var(--mono);color:var(--text);background:var(--panel)}.st-atom-inventory button span{font:9px var(--sans,sans-serif);color:var(--muted)}.st-atom-inventory button[aria-pressed=true]{border-color:var(--mint);background:var(--panel2)}.st-no-atoms{font-size:10px;color:var(--muted);line-height:1.6}
@media(max-width:760px){.st-atom-key{margin-inline:18px}.st-water-note{padding-inline:18px}.st-atom-inventory{grid-template-columns:1fr}.st-atom-inventory button{min-height:34px}}

/* Linked sequence stays beside its molecular view, rather than behind a menu. */
.st-linked-sequence{padding:17px 24px 14px;border-bottom:1px solid var(--line);background:var(--panel)}
.st-sequence-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:12px;font-size:10px;color:var(--muted)}
.st-sequence-heading strong{color:var(--text);font-size:11px;font-weight:600;white-space:nowrap}
.st-sequence-heading span{font-size:10px;line-height:1.5;text-align:right}
.st-sequence-chain{display:flex;gap:8px;align-items:center;margin:7px 0;min-width:0}
.st-chain-name,.st-chain-end{flex-shrink:0;font:10px var(--mono);color:var(--muted)}
.st-chain-name{min-width:43px}.st-sequence-scroll{display:flex;gap:3px;overflow:auto;min-width:0;padding:4px 3px 7px;scrollbar-width:thin}
.st-sequence-scroll button{flex:0 0 29px;min-height:44px;border:1px solid transparent;border-radius:5px;padding:4px 2px 3px;color:#213b43;display:grid;place-items:center;gap:3px;background:var(--st-base,#d0d9dc);transition:opacity .15s,border-color .15s}
.st-sequence-scroll button[data-base=A]{--st-base:var(--base-a,#a8d8ff);color:var(--base-a-ink,#213b43)}
.st-sequence-scroll button[data-base=T]{--st-base:var(--base-t,#ffb6bd);color:var(--base-t-ink,#213b43)}
.st-sequence-scroll button[data-base=C]{--st-base:var(--base-c,#fff0a6);color:var(--base-c-ink,#213b43)}
.st-sequence-scroll button[data-base=G]{--st-base:var(--base-g,#b7e8bf);color:var(--base-g-ink,#213b43)}
.st-sequence-scroll button[data-base=U]{--st-base:#f4ca95}.st-sequence-scroll b{font:600 13px var(--mono)}.st-sequence-scroll small{font:8px var(--mono);opacity:.8}
.st-sequence-scroll button.is-outside-view{opacity:.48}.st-sequence-scroll button:hover{opacity:1;border-color:#547b78}.st-sequence-scroll button[aria-pressed=true]{opacity:1;border-color:var(--mint);outline:2px solid var(--mint);outline-offset:1px}
.st-chemical-details{margin:14px 0 4px;border-top:1px solid var(--line);padding-top:12px}.st-chemical-details>summary{cursor:pointer;font-size:11px;color:var(--mint)}
@media(max-width:760px){.st-linked-sequence{padding-inline:18px}.st-sequence-heading{display:block}.st-sequence-heading span{display:block;text-align:left;margin-top:5px}.st-sequence-scroll button{flex-basis:32px;min-height:46px}}