/* R11: stack the open-cell mark over the subscript, and add research questions. */
.cell-symbol{font-family:'Cambria Math',math;font-size:1em;vertical-align:baseline;white-space:nowrap}
.equation math.cell-symbol{display:inline math;margin:0;line-height:normal;font-family:'Cambria Math',math}
.cell-symbol .cell-mark{font-size:.475em}
.overline:has(.cell-symbol){padding-top:.17em}
.questions-section{background:#f4f8f7;border-top:1px solid var(--line)}
.questions-lead{font-size:21px;line-height:1.6;max-width:970px;margin-bottom:16px}
.questions-framing{font-size:14px;color:var(--muted);max-width:930px;margin-bottom:32px}
.questions-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
.research-question{min-width:0;padding:28px;background:white;border:1px solid var(--line);border-top:3px solid var(--teal);border-radius:4px}
.research-question h3{font-family:var(--serif);font-size:29px;font-weight:500;line-height:1.2;margin-bottom:20px}
.research-question h3 .math{font-size:1em;white-space:nowrap}
.research-question .eyebrow{font-size:12px;margin-bottom:16px}
.research-question .question-link{display:block;margin:24px 0 20px;font-weight:650;line-height:1.5;font-size:15px}
.questions-section .source{font-size:13px;line-height:1.6;color:var(--muted);margin-top:22px}
.questions-section .questions-equation{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:12px 0 17px;margin:12px 0;font-size:22px;line-height:1.8}
.questions-equation math{font-family:'Cambria Math',math;font-size:1em;white-space:nowrap;text-align:left;margin:0;width:max-content;max-width:none}
.questions-equation math mo{min-size:0;max-size:1.1em}
.questions-equation-long{font-size:20px!important}
.discussion-example{margin-top:30px;border:1px solid var(--line);border-radius:4px;background:white;padding:30px}
.discussion-example-head{display:grid;grid-template-columns:1fr auto;gap:25px;padding-bottom:14px;align-items:start}
.discussion-example-head h3{font:500 29px/1.2 var(--serif);margin-bottom:13px}
.discussion-example-head .eyebrow{margin-bottom:12px}
.example-location{font-size:14px;line-height:1.8;text-align:right;min-width:220px}
.example-location span{display:block;color:var(--muted);font-size:12px;margin-top:7px}
.questions-section .discussion-details{margin:0;border-left:0;border-right:0;border-bottom:0;border-radius:0;background:transparent}
.questions-section .discussion-details:last-child{border-bottom:1px solid var(--line)}
.questions-section .discussion-details summary{font-size:17px;font-weight:650;line-height:1.5;padding:22px 36px 22px 0}
.questions-section .discussion-details summary::after{right:0}
.questions-section .discussion-details .detail-body{padding:2px 0 28px;max-width:100%;}
.questions-section .discussion-details .detail-body>p{max-width:1000px}
.slice-switch,.discussion-graph-actions{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.slice-switch button,.discussion-graph-actions button{background:white;color:var(--ink);border:1px solid var(--line);border-radius:3px;padding:12px 16px;font-size:15px;line-height:1.5;min-height:46px}
.slice-switch button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}
.discussion-graph-actions button{border-color:var(--teal);color:var(--teal);font-weight:650}
.slice-readout{padding:24px;border:1px solid var(--line);background:var(--pale);margin-bottom:24px}
.coordinate-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:20px}
.coordinate-grid>div{min-width:0;background:white;padding:17px 12px;border:1px solid var(--line);text-align:center}
.coordinate-grid .math{display:block;font-size:25px;margin-bottom:8px}
.coordinate-grid b{display:block;font-size:12px;line-height:1.5;color:var(--muted);font-weight:550}
.coordinate-grid .coordinate-determined{background:#e0f1ed;border-color:var(--teal)}
.coordinate-grid .coordinate-determined b{color:var(--teal)}
.slice-readout [hidden]{display:none!important}
.missing-edge-chips{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}
.missing-edge-chips span{font:20px/1.6 var(--serif);background:#eff4f6;padding:8px 15px;border:1px solid var(--line);border-radius:3px;white-space:nowrap}
.research-outlook{margin-top:32px;padding:26px 30px;border-left:3px solid var(--teal);background:#e5f1ed}
.research-outlook>p:not(.eyebrow):not(.source){font:500 25px/1.5 var(--serif);max-width:960px}
.research-outlook .eyebrow{margin-bottom:12px}
.research-outlook .math{font-size:1em}
.footer>div>div:first-child>p:last-child{max-width:900px}
.topbar>div{gap:15px}
@media(max-width:1000px){.questions-grid{grid-template-columns:1fr}.research-question{padding:25px}.example-location{text-align:left;min-width:0}.discussion-example-head{grid-template-columns:1fr}.questions-equation math{font-size:1em}}
@media(max-width:760px){.questions-lead{font-size:19px}.questions-framing{font-size:13px}.research-question{padding:22px 18px}.research-question h3{font-size:26px}.discussion-example{padding:23px 18px}.discussion-example-head h3{font-size:25px}.questions-section .questions-equation{font-size:20px}.questions-section .discussion-details summary{font-size:16px}.slice-readout{padding:18px 12px}.coordinate-grid{gap:7px}.coordinate-grid>div{padding:12px 3px}.coordinate-grid b{font-size:11px}.coordinate-grid .math{font-size:22px}.slice-switch{display:grid;grid-template-columns:1fr}.research-outlook{padding:23px 18px}.research-outlook>p:not(.eyebrow):not(.source){font-size:23px}.topbar>div{gap:15px}}
@media print{.slice-switch,.discussion-graph-actions{display:none}.research-question{break-inside:avoid}.questions-section{background:white}.questions-grid{display:block}.research-question{margin-bottom:14px}.questions-section .questions-equation{font-size:14pt}}
/* Keep the keyboard skip link visually hidden until it receives focus. */
.skip:not(:focus){clip-path:inset(50%);width:1px;height:1px;padding:0;overflow:hidden;white-space:nowrap}