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8px;font-size:10px;display:inline-flex}.dot{background:currentColor;border-radius:50%;width:6px;height:6px;display:inline-block}.spine{position:relative}.spine:before{content:"";background:var(--rule-strong);width:1px;position:absolute;top:12px;bottom:12px;left:11px}.spine-node{gap:20px;padding:14px 0}.spine-marker,.spine-node{display:flex;position:relative}.spine-marker{border:1px solid var(--rule-strong);background:var(--paper);height:23px;font-family:var(--mono);color:var(--ink-3);z-index:1;transition:all var(--dur) var(--ease);border-radius:50%;flex:0 0 23px;justify-content:center;align-items:center;font-size:11px}.spine-node.done .spine-marker{background:var(--ink);color:var(--paper);border-color:var(--ink)}.spine-node.current .spine-marker{border-color:var(--ink);color:var(--ink)}.spine-node.current .spine-marker:after{content:"";border:1px solid var(--accent);animation:pulse-ring 1.6s var(--ease) infinite;border-radius:50%;position:absolute;inset:-6px}.spine-node.inserted .spine-marker{background:var(--accent-soft);color:var(--accent);border-color:var(--accent);border-style:dashed}.option{text-align:left;border:1px solid var(--rule);border-radius:var(--rad);width:100%;font-family:var(--sans);transition:all var(--dur-fast) var(--ease);color:var(--ink);cursor:pointer;background:0 0;align-items:center;gap:14px;padding:16px 18px;font-size:15px;display:flex}.option:hover:not(:disabled){border-color:var(--rule-strong);background:var(--paper-2)}.option .letter{border:1px solid var(--rule-strong);width:26px;height:26px;font-family:var(--mono);color:var(--ink-3);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;display:inline-flex}.option[aria-pressed=true]{border-color:var(--ink);background:var(--paper-2)}.option[aria-pressed=true] .letter{background:var(--ink);color:var(--paper);border-color:var(--ink)}.option.correct{border-color:var(--success);background:var(--success)}@supports (color:color-mix(in lab,red,red)){.option.correct{background:color-mix(in oklch,var(--success) 8%,transparent)}}.option.correct .letter{background:var(--success);color:var(--paper);border-color:var(--success)}.option.wrong{border-color:var(--danger);background:var(--danger)}@supports (color:color-mix(in lab,red,red)){.option.wrong{background:color-mix(in oklch,var(--danger) 8%,transparent)}}.option.wrong .letter{background:var(--danger);color:var(--paper);border-color:var(--danger)}.chip{font-family:var(--sans);border:1px solid var(--rule);color:var(--ink-2);border-radius:100px;gap:6px;padding:4px 10px;font-size:12px}.chip,.mark{align-items:center;display:inline-flex}.mark{width:16px;height:16px;color:var(--paper);border-radius:50%;justify-content:center;font-size:10px}.mark.ok{background:var(--success)}.mark.no{background:var(--danger)}.mark.skip{background:var(--ink-4)}.module-grid{grid-template-columns:minmax(0,1fr) 220px;align-items:start;gap:72px;display:grid}.module-content{min-width:0}.module-content .prose{max-width:680px}.module-toc{font-family:var(--sans);padding-top:8px;font-size:12px;position:sticky;top:64px}.toc-mobile-btn{display:none}@media (max-width:900px){.module-grid{grid-template-columns:1fr;gap:0}.module-toc{display:none}.toc-mobile-btn{display:inline-flex}.module-content .prose{max-width:100%}.module-content .prose h1{font-size:36px}.module-content .prose h2{font-size:24px}}.toc-sheet-backdrop{z-index:70;animation:fade-in .2s var(--ease) both;background:#00000059;align-items:flex-end;display:flex;position:fixed;inset:0}.toc-sheet{background:var(--paper);width:100%;animation:fade-up .22s var(--ease) both;border-top-left-radius:16px;border-top-right-radius:16px;max-height:70vh;padding:24px 24px 40px;overflow-y:auto;box-shadow:0 -20px 60px #0003}.hstack{align-items:center;display:flex}.vstack{flex-direction:column;display:flex}.gap-1{gap:4px}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.gap-6{gap:24px}.gap-8{gap:32px}@media print{.hide-print{display:none!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}