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.quiz-card-number{border-radius:var(--r-sm);background:var(--accent-subtle);width:32px;height:32px;color:var(--accent);font-weight:700;font-size:var(--text-sm);flex-shrink:0;justify-content:center;align-items:center;display:flex}.quiz-panel .quiz-question{font-family:var(--font-body);font-size:var(--text-lg);color:var(--text-headings);flex:1;margin:0;font-weight:600;line-height:1.5}.quiz-panel .quiz-options{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}@media (width<=640px){.quiz-panel .quiz-options{grid-template-columns:1fr}}.quiz-panel .quiz-option{background:var(--bg-quiz-option);border:1.5px solid var(--border);border-radius:var(--r-sm);text-align:left;font-size:var(--text-sm);color:var(--text-main);cursor:pointer;transition:background-color .12s var(--ease-out), border-color .12s var(--ease-out), color .12s var(--ease-out);box-sizing:border-box;width:100%;font-weight:500;font-family:var(--font-body);padding:12px 16px}.quiz-panel .quiz-option:hover:not(:disabled){background:var(--accent-subtle);border-color:var(--accent);color:var(--accent)}.quiz-panel .quiz-option:disabled{cursor:default}.quiz-panel .quiz-option.correct{background:var(--callout-example-bg);border-color:var(--callout-example-border);color:var(--callout-example-text);font-weight:600}.quiz-panel .quiz-option.incorrect{background:var(--callout-warning-bg);border-color:var(--callout-warning-border);color:var(--callout-warning-text)}.quiz-panel .quiz-explanation{background:var(--bg-subtle);border-left:3px solid var(--accent);border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:var(--text-sm);color:var(--text-main);margin-top:16px;padding:14px 18px;line-height:1.7}.quiz-panel .quiz-explanation strong{color:var(--accent)}.quiz-panel .quiz-explanation.hidden{display:none}.quiz-panel .quiz-score{text-align:center;background:var(--bg-quiz-score);border:1px solid var(--border-quiz-score);border-radius:var(--r-md);margin-top:20px;padding:24px}.quiz-panel 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.quiz-retry:hover{background:var(--accent-subtle);border-color:var(--accent)}.revision-panel .guide-header{margin-bottom:28px}.revision-panel .guide-header h2{font-family:var(--font-display);font-size:var(--text-3xl);color:var(--text-headings);letter-spacing:-.02em;margin:0 0 6px;font-weight:800}.revision-panel .guide-header .guide-meta{font-size:var(--text-sm);color:var(--text-muted);flex-wrap:wrap;gap:12px;display:flex}.revision-panel .section-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-sm);margin-bottom:14px;padding:20px}.revision-panel .section-card-number{border-radius:var(--r-sm);background:var(--accent);width:28px;height:28px;color:var(--accent-contrast);font-weight:700;font-size:var(--text-xs);flex-shrink:0;justify-content:center;align-items:center;display:flex}.revision-panel 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0;font-size:var(--text-sm);color:var(--text-main);background:var(--bg-subtle);padding:14px 18px}.revision-mustknow strong{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.7rem;display:block}.revision-formula{background:var(--accent-subtle);border:1px solid var(--accent);border-radius:var(--r-sm);text-align:center;font-size:var(--text-base);color:var(--text-headings);padding:16px;overflow-x:auto}.revision-pitfall{border-left:3px solid var(--callout-warning-border);border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:var(--text-sm);color:var(--text-revision-pitfall);background:var(--bg-revision-pitfall);padding:14px 18px}.revision-pitfall strong{color:var(--text-revision-pitfall-strong);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.7rem;display:block}.revision-check{border:1px solid var(--border-revision-check);border-radius:var(--r-sm);font-size:var(--text-sm);color:var(--text-revision-check);background:var(--bg-revision-check);padding:14px 18px;font-style:italic}.revision-check strong{color:var(--text-revision-check-strong);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;font-size:.7rem;font-style:normal;display:block}.revision-connections{font-size:var(--text-xs);color:var(--text-muted);border-top:1px dashed var(--border);flex-wrap:wrap;align-items:center;gap:6px;margin-top:14px;margin-bottom:0;padding-top:12px;display:flex}.revision-connections strong{color:var(--text-headings);text-transform:uppercase;letter-spacing:.05em;margin-right:4px;font-size:.7rem;font-weight:700}.algorithm-trace{flex-direction:column;gap:12px;margin:18px 0 24px;display:flex}.trace-step{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-sm);overflow:hidden}.trace-step:hover{border-color:var(--border-strong);box-shadow:none;transform:none}.trace-step-header{background:var(--bg-subtle);border-bottom:1px solid var(--border);align-items:center;gap:10px;padding:12px 16px;display:flex}.trace-step-icon{border-radius:50%;flex-shrink:0;width:12px;height:12px}.trace-step-icon.start{background:#22c55e;box-shadow:0 0 0 3px #22c55e26}.trace-step-icon.expand{background:var(--accent);box-shadow:0 0 0 3px var(--accent-subtle)}.trace-step-icon.goal{background:#22c55e;box-shadow:0 0 0 3px #22c55e33}.trace-step-label{font-weight:600;font-size:var(--text-sm);color:var(--text-headings);flex:1}.trace-step-cost{font-family:var(--font-code);font-size:var(--text-xs);color:var(--text-muted);background:var(--bg-subtle);border:1px solid var(--border);white-space:nowrap;border-radius:4px;padding:2px 8px}.trace-step-body{font-size:var(--text-sm);color:var(--text-main);padding:12px 16px;line-height:1.7}.trace-step-body .trace-frontier{background:var(--bg-subtle);border-radius:var(--r-sm);font-size:var(--text-xs);color:var(--text-main);margin-top:6px;padding:8px 12px;line-height:1.6;display:block}.trace-step-body .trace-frontier strong{color:var(--accent)}.trace-step-body .trace-pick{background:var(--accent-subtle);color:var(--accent);font-size:var(--text-xs);border-radius:4px;margin-top:6px;padding:2px 6px;font-weight:600;display:inline-block}.trace-conclusion{background:var(--bg-subtle);border-left:3px solid var(--accent);border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:var(--text-sm);color:var(--text-main);margin-top:6px;padding:16px 20px;line-height:1.7}.trace-conclusion .cost-breakdown{font-family:var(--font-code);font-size:var(--text-xs);color:var(--text-headings);margin:6px 0 4px;display:block}.trace-conclusion .verdict{color:var(--text-headings);margin-top:6px;font-weight:600}.trace-conclusion .verdict.optimal{color:#059669}.trace-conclusion .verdict.suboptimal{color:#d97706}figure{width:100%;margin:28px 0;padding:0}figcaption{font-size:var(--text-sm);color:var(--text-muted);text-align:center;margin-bottom:14px;display:block}figcaption strong{color:var(--text-headings)}.flow-diagram{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);flex-direction:column;gap:16px;margin:14px 0;padding:20px;display:flex}.flow-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;width:100%;display:flex}.flow-node{border-radius:var(--r-sm);font-size:var(--text-sm);text-align:center;border:1px solid var(--border);min-width:130px;padding:10px 16px;font-weight:600}.flow-node.sw{background:var(--accent-subtle);border-color:var(--accent);color:var(--accent)}.flow-node.ml-core{background:var(--callout-example-bg);border-color:var(--callout-example-border);color:var(--callout-example-text);border-style:dashed}.flow-node.db{background:var(--callout-note-bg);border-color:var(--callout-note-border);color:var(--callout-note-text)}.flow-arrow{color:var(--text-muted);-webkit-user-select:none;user-select:none;padding:0 4px;font-size:1.1rem;font-weight:700}.pipeline-flow{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-sm);flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;margin:14px 0;padding:14px 18px;display:flex}.pipe-node{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--r-sm);font-size:var(--text-xs);color:var(--text-main);padding:4px 10px;font-weight:500}.pipe-node:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-subtle)}.pipe-arrow{color:var(--text-muted);font-size:var(--text-sm)}.parallel-pipelines{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);flex-direction:column;gap:16px;margin:14px 0;padding:24px;display:flex;overflow-x:auto}.pp-row{justify-content:space-between;align-items:center;gap:6px;width:100%;min-width:640px;display:flex}.pp-node{border-radius:var(--r-sm);font-size:var(--text-xs);text-align:center;border:1px solid var(--border);flex:1;justify-content:center;align-items:center;min-height:44px;padding:8px 14px;font-weight:600;display:flex}.pp-node.br{margin-bottom:2px}.pp-node.se{background:var(--accent-subtle);border-color:var(--accent);color:var(--accent)}.pp-node.ml{background:var(--callout-example-bg);border-color:var(--callout-example-border);color:var(--callout-example-text)}.pp-arrow{color:var(--text-muted);font-size:var(--text-sm);-webkit-user-select:none;user-select:none;flex-shrink:0;font-weight:700}.pp-connector{justify-content:center;align-items:center;width:100%;min-width:640px;display:flex;position:relative}.pp-connector:before{content:"";border-top:1px dashed var(--border);z-index:1;position:absolute;top:50%;left:0;right:0}.pp-link-label{z-index:2;background:var(--callout-note-bg);border:1px solid var(--callout-note-border);color:var(--callout-note-text);border-radius:var(--r-sm);padding:3px 12px;font-size:.7rem;font-weight:700;position:relative}.apollo-flow{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);flex-direction:row;justify-content:space-between;align-items:stretch;gap:14px;margin:14px 0;padding:20px;display:flex;overflow-x:auto}.apollo-inputs,.apollo-preprocess,.apollo-models,.apollo-postprocess,.apollo-predictor{flex-direction:column;flex:1;justify-content:space-around;gap:10px;min-width:110px;display:flex}.apollo-ml-group{background:var(--accent-subtle);border:1px dashed var(--accent);border-radius:var(--r-sm);flex-direction:column;gap:6px;padding:6px;display:flex}.apollo-sensor,.apollo-node{border-radius:var(--r-sm);font-size:var(--text-xs);text-align:center;border:1px solid var(--border);justify-content:center;align-items:center;min-height:40px;padding:8px 10px;font-weight:600;display:flex}.apollo-sensor.hw{background:var(--bg-subtle);border-color:var(--border);color:var(--text-headings)}.apollo-node.sw{background:var(--accent-subtle);border-color:var(--accent);color:var(--accent)}.apollo-node.ml{background:var(--callout-example-bg);border-color:var(--callout-example-border);color:var(--callout-example-text)}.apollo-node.fusion{background:var(--callout-note-bg);border-color:var(--callout-note-border);color:var(--callout-note-text);border-width:2px}.gr-symbols-display{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);flex-wrap:wrap;justify-content:center;gap:16px;margin:14px 0;padding:20px;display:flex}.gr-symbol{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;width:90px;display:flex}.gr-label{color:var(--text-muted);font-size:.7rem;font-weight:600}.gr-stick-figure{flex-direction:column;align-items:center;width:24px;height:40px;display:flex;position:relative}.gr-head{border:2px solid var(--text-headings);background:var(--bg-card);border-radius:50%;width:12px;height:12px}.gr-body{background:var(--text-headings);width:2px;height:16px}.gr-arms{background:var(--text-headings);width:20px;height:2px;position:absolute;top:15px}.gr-legs{justify-content:space-between;width:16px;height:12px;display:flex;position:absolute;top:28px}.gr-legs:before,.gr-legs:after{content:"";background:var(--text-headings);width:2px;height:12px}.gr-legs:before{transform:rotate(15deg)}.gr-legs:after{transform:rotate(-15deg)}.gr-ellipse{border:2px solid 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#topic-sidebar,#topic-sidebar.bn-chat-active-hide{opacity:0!important;visibility:hidden!important;pointer-events:none!important;width:0!important;min-width:0!important;margin-left:0!important;margin-right:0!important;padding-left:0!important;padding-right:0!important;overflow:hidden!important}body.bn-chatbot-open #lecture-viewer-container{max-width:100%!important;padding-right:clamp(380px,40vw,650px)!important}body.bn-chatbot-open #main-lecture-container{flex:1!important;width:100%!important;max-width:none!important;margin-left:0!important;margin-right:0!important}#bn-chatbot-panel.docked-mode{will-change:transform, opacity;border-top:none!important;border-bottom:none!important;border-right:none!important;border-left:1px solid var(--border)!important;z-index:105!important;opacity:0!important;visibility:hidden!important;pointer-events:none!important;border-radius:0!important;width:clamp(380px,40vw,650px)!important;max-width:40vw!important;height:calc(100vh - 56px)!important;max-height:calc(100vh - 56px)!important;margin:0!important;transition:transform .35s cubic-bezier(.16,1,.3,1),opacity .25s,visibility .35s!important;position:fixed!important;inset:56px 0 0 auto!important;transform:translate(100%)!important;box-shadow:-8px 0 32px #0000001f!important}#bn-chatbot-panel.docked-mode.open{opacity:1!important;visibility:visible!important;pointer-events:auto!important;transform:translate(0)!important}}