.cardiac-page{max-width:1440px;margin:auto;padding:28px var(--pad) 70px}.cardiac-intro{display:grid;grid-template-columns:1.6fr 1fr;gap:70px;align-items:center;padding:28px 0 52px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--teal);margin-bottom:12px}.cardiac-intro h1{font-family:var(--font-serif);font-weight:400;font-size:clamp(42px,5.6vw,76px);line-height:1.03;margin:12px 0 22px;letter-spacing:-.035em}.intro-copy{max-width:610px;font-size:16px;line-height:1.8}.model-credit{font-size:12px;color:var(--mint-soft);margin-top:22px}.question-card{border-left:1px solid var(--mint-line);padding:16px 0 16px 32px}.question-card h2{font-family:var(--font-serif);font-size:30px;font-weight:400;margin-bottom:14px}.question-card p{line-height:1.8;margin-bottom:24px}.question-card .btn{font-size:12px}.lab{background:var(--navy);color:var(--navy-ink);border-radius:12px;overflow:hidden;box-shadow:0 18px 50px #10302c15}.lab-top{display:flex;justify-content:space-between;padding:20px 26px;border-bottom:1px solid var(--navy-line);font-size:12px}.lab-top>div{display:flex;align-items:center;gap:10px}.live-dot{width:7px;height:7px;border-radius:50%;background:#74c8b5}.model-note{color:#a8bbce}.view-tabs{display:flex;border-bottom:1px solid var(--navy-line);padding:0 24px;gap:30px}.view-tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:20px 0;color:#91a6bc;cursor:pointer;font:inherit;font-size:11px}.view-tabs span{font-size:13px;margin-left:8px}.view-tabs [aria-pressed=true]{color:var(--amber);border-bottom-color:var(--amber)}.lab-body{display:grid;grid-template-columns:260px minmax(0,1fr)}.lab-controls{padding:28px 24px;border-right:1px solid var(--navy-line)}.lab h2,.lab h3{color:var(--navy-ink);font-weight:500}.lab-controls h2{font-size:17px;margin-bottom:12px}.lab-controls p{font-size:12px;line-height:1.7;color:#a8bbce;margin-bottom:22px}.lab-controls label{font-size:12px;display:block;margin:20px 0 10px;color:#d4e1ef}.lab-controls label output,.lab-controls label>span{display:block;color:#a8bbce;font-size:11px;margin-top:4px}.lab input[type=range]{width:100%;accent-color:var(--amber);cursor:pointer}.number-unit{display:flex;align-items:center;gap:10px;font-size:12px}.number-unit input{width:100%;background:var(--navy-2);border:1px solid #486079;border-radius:5px;padding:10px;color:#fff;font:inherit}.control-divider{height:1px;background:var(--navy-line);margin:24px 0}.action-stack,.sweep-actions{display:grid;gap:9px;margin-top:20px}.lab-button{font:inherit;font-size:12px;color:#e7eef6;background:#1b3047;border:1px solid #496078;padding:9px 13px;border-radius:5px;cursor:pointer}.lab-button:hover{background:#29425c}.lab .btn{font-size:12px;justify-content:center}.text-button{font:inherit;font-size:11px;border:0;background:none;color:#b5c9db;cursor:pointer;text-decoration:underline;text-underline-offset:4px;margin-top:20px;display:block}.lab button:disabled{opacity:.45;cursor:default}.lab button:focus-visible,.lab select:focus-visible,.lab input:focus-visible,.lab summary:focus-visible{outline:2px solid #f2a93b;outline-offset:4px}.lab-results{padding:26px;min-width:0}.trace-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.trace-heading h2{font-family:var(--font-serif);font-size:27px}.trace-heading h3{font-size:14px}.lab .eyebrow{color:#a8bbce;font-size:10px;margin-bottom:6px}.legend{display:flex;gap:16px;font-size:11px;flex-wrap:wrap}.legend span:before{content:'';display:inline-block;width:15px;height:2px;vertical-align:middle;margin-right:6px;background:var(--amber)}.legend .neuron-key:before{background:#77d9cd}.lab[data-view=heart] .neuron-key{display:none}.cell-strip{display:flex;gap:14px;align-items:center;padding:18px 0 4px}.cell-strip svg{width:120px;flex-shrink:0}.cell-strip b{font-size:12px;font-weight:500;display:block}.cell-strip span{color:var(--amber);font:12px monospace}.cell-strip p{font-size:10px;color:#a8bbce;margin-left:auto;line-height:1.6}.lab canvas{display:block;width:100%;height:280px}.lab #currentPlot{height:175px}.playback{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.playback input{flex:1;min-width:70px}.playback output{font:11px monospace;color:#bfd0e1}.lab select{font:inherit;font-size:11px;background:#1b3047;border:1px solid #496078;border-radius:5px;color:#e7eef6;padding:9px;max-width:100%}.fine{font-size:11px!important;line-height:1.7;color:#a8bbce;margin-top:10px}.secondary-plot{margin-top:24px;padding-top:20px;border-top:1px solid var(--navy-line)}.status-row{display:flex;align-items:center;gap:12px;margin:20px 0 8px}.status-row p{font-size:12px;color:#bfd0e1;line-height:1.6}.lab progress{width:100%;accent-color:var(--amber)}.table-scroll{overflow-x:auto}.metrics-table{width:100%;border-collapse:collapse;font-size:11px;margin-top:16px;color:#e7eef6}.metrics-table caption{text-align:left;color:#a8bbce;font-size:11px;padding-bottom:10px}.metrics-table th{text-align:left;color:#9cb1c7;font-weight:500}.metrics-table td,.metrics-table th{padding:12px 10px;border-bottom:1px solid var(--navy-line);white-space:nowrap}.metrics-table td:first-child,.metrics-table th:first-child{padding-left:0}.export-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.sweep-panel{border-top:1px solid var(--navy-line);padding:28px}.sweep-panel>p{font-size:12px;line-height:1.8;margin-top:16px}.sweep-panel details{margin-top:20px}.sweep-panel summary{font-size:12px;cursor:pointer}.sweep-panel .table-scroll{max-height:350px}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;padding:60px 0 40px}.lesson-grid h2{font:400 28px var(--font-serif);margin-bottom:18px}.lesson-grid p:not(.eyebrow),.methods p{font-size:13px;line-height:1.9;margin-bottom:14px}.methods{padding-top:30px;border-top:1px solid var(--mint-line)}.methods h2{font:400 30px var(--font-serif);margin-bottom:20px}.methods details{border:1px solid var(--mint-line);padding:16px 20px;margin:20px 0}.methods summary{cursor:pointer;font-size:13px}.methods details p{margin-top:15px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
@media(max-width:1000px){.cardiac-intro{gap:30px}.lab-body{grid-template-columns:220px minmax(0,1fr)}.lab-results{padding:20px}.cell-strip p{display:none}.trace-heading{flex-wrap:wrap}.view-tabs{gap:18px}.view-tabs span{font-size:11px}.lesson-grid{gap:24px}}
@media(max-width:720px){.cardiac-page{padding:12px 16px 40px}.cardiac-intro{grid-template-columns:1fr;padding-top:12px;gap:20px}.question-card{padding:16px 20px;border:1px solid var(--mint-line);border-radius:8px}.cardiac-intro h1{font-size:48px}.lab-body{grid-template-columns:1fr}.lab-controls{border-right:0;border-bottom:1px solid var(--navy-line);display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.lab-controls h2,.lab-controls>p,.lab-controls .control-divider,.lab-controls>label,.lab-controls>input,.pair-controls{grid-column:1/-1}.lab-controls label{margin-top:12px}.lab-results{padding:20px 14px}.view-tabs{gap:14px;padding:0 14px}.view-tabs button{font-size:0;flex:1}.view-tabs span{font-size:11px;margin:0}.lab-top{padding:16px}.model-note{display:none}.lesson-grid{grid-template-columns:1fr;padding-top:36px}.sweep-panel{padding:20px 14px}.lab canvas{height:245px}.playback select{width:100%}.legend{margin-top:8px}.cell-strip{padding-top:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.legend .condition-key:before{background:var(--trace-color)}

.lab .playback .lab-button{width:auto;flex-shrink:0}.lab .playback input[type=range]{width:auto}.lab .playback select{width:auto}.lab .trace-heading select{width:auto}.lab .export-row .lab-button{width:auto}.lab .status-row .lab-button{width:auto;flex-shrink:0}
@media(max-width:720px){.lab .playback select{width:100%}}