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14px;display:flex}.q-nav-pill{background:var(--paper);border:1px solid var(--slate-border);width:36px;height:36px;color:var(--muted);border-radius:8px;place-items:center;font-size:13px;font-weight:700;transition:all .15s;display:grid;position:relative}.q-nav-pill:hover{border-color:var(--indigo)}.q-nav-pill.answered{background:var(--indigo-light);border-color:var(--indigo-border);color:var(--indigo)}.q-nav-pill.current{background:var(--indigo);border-color:var(--indigo);color:var(--on-indigo);box-shadow:0 2px 8px #2d2b7a59}.q-nav-pill .flag-dot{background:var(--amber);border-radius:50%;width:6px;height:6px;position:absolute;top:4px;right:4px}.quiz-question-card{background:var(--paper);border:1px solid var(--line);padding:var(--quiz-card-pad);border-radius:18px;box-shadow:0 2px 14px #00000008}.q-card-top{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:20px;display:flex}.flag-btn{color:var(--muted);border:1px solid 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var(--green)!important;background:var(--green-bg)!important}.quiz-option-btn.live-opt-correct .opt-letter{background:var(--green)!important;color:var(--on-green)!important}.quiz-option-btn.live-opt-wrong{box-shadow:0 2px 10px #dc26261f;border:2px solid var(--red)!important;background:var(--red-bg)!important}.quiz-option-btn.live-opt-wrong .opt-letter{background:var(--red)!important;color:var(--on-red)!important}.quiz-option-btn.live-opt-dimmed{opacity:.65;background:var(--paper-2);border-color:var(--line)}.quiz-option-btn.live-opt-dimmed:hover{opacity:.95;background:var(--paper);border-color:#a5b4fc}.live-opt-pill{text-transform:uppercase;border-radius:6px;padding:4px 10px;font-size:11px;font-weight:800}.live-opt-pill.correct{background:var(--green);color:var(--on-green)}.live-opt-pill.wrong{background:var(--red);color:var(--on-red)}.live-feedback-box{border:1px solid var(--line);border-radius:12px;margin-top:22px;padding:20px 24px;font-size:14.5px;line-height:1.65;animation:.2s ease-in fadeIn}.live-feedback-box.correct{background:var(--green-bg);border-color:var(--green-border);border-left:5px solid var(--green)}.live-feedback-box.incorrect{background:var(--red-bg);border-color:var(--red-border);border-left:5px solid var(--red)}.live-feedback-title b{margin-bottom:8px;font-size:15px;display:block}.live-feedback-box.correct .live-feedback-title b{color:var(--green)}.live-feedback-box.incorrect .live-feedback-title b{color:var(--red)}.live-feedback-explanation{color:var(--slate-text);margin:0 0 10px}.live-distractor-trap{background:var(--paper);border:1px solid var(--coral-border);color:var(--coral);border-radius:8px;margin-top:8px;padding:10px 14px;font-size:13.5px}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.opt-letter{color:var(--indigo);background:var(--indigo-light);border-radius:8px;flex-shrink:0;place-items:center;width:32px;height:32px;font-size:14px;font-weight:800;display:grid}.quiz-option-btn.selected .opt-letter{background:var(--indigo);color:var(--on-indigo)}.opt-label{color:var(--ink);flex:1;font-size:15.5px;line-height:1.5}.quiz-actions{bottom:var(--bottom-offset);z-index:40;margin-top:36px;margin-left:calc(-1 * var(--quiz-card-pad));margin-right:calc(-1 * var(--quiz-card-pad));margin-bottom:calc(-1 * var(--quiz-card-pad));padding:16px var(--quiz-card-pad);background:var(--paper);border-top:1px solid var(--line);justify-content:space-between;gap:12px;display:flex;position:sticky}.quiz-actions .button{flex-shrink:0}.result-header-panel{background:var(--paper);border:1px solid 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var(--line);justify-content:space-between;align-items:center;gap:16px;display:flex;position:sticky}.sheet-filter-bar h3{font-family:var(--font-serif);margin:0;font-size:24px;font-weight:700}.sheet-filter-bar .eyebrow{margin:2px 0 0}.filter-pills{flex-wrap:wrap;gap:10px;display:flex}.filter-pill{background:var(--slate-soft);color:var(--muted);white-space:nowrap;border-radius:8px;padding:9px 18px;font-size:13px;font-weight:700;transition:all .15s}.filter-pill:hover{background:var(--slate-bg)}.filter-pill.active{background:var(--indigo);color:var(--on-indigo)}.filter-pill.incorrect.active{background:var(--red);color:var(--on-red)}.filter-pill.correct.active{background:var(--green);color:var(--on-green)}.answer-sheet-list{gap:24px;display:grid}.answer-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:30px;box-shadow:0 2px 10px #00000005}.answer-card.card-correct{border-left:6px solid var(--green)}.answer-card.card-incorrect{border-left:6px solid 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var(--line);border-radius:16px;flex-direction:column;width:min(400px,100%);max-height:72vh;animation:.2s sheet-in;display:flex;overflow:hidden;box-shadow:0 20px 60px #14152b59}.toc-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:16px 18px;display:flex}.toc-head h3{font-family:var(--font-serif);margin:0;font-size:18px}.toc-list{gap:2px;padding:8px;display:grid;overflow-y:auto}.toc-list button{text-align:left;color:var(--ink);border-radius:8px;align-items:center;gap:10px;padding:11px 12px;font-size:14px;display:flex}.toc-list button:hover{background:var(--paper-2)}.toc-list button svg{color:var(--indigo);flex-shrink:0}.resume-banner{background:var(--amber-bg);border:1px solid var(--amber-border);color:var(--amber);border-radius:10px;align-items:center;gap:8px;margin-bottom:14px;padding:10px 14px;font-size:13px;font-weight:600;display:flex}.data-section{margin-top:24px}.data-note{color:var(--muted);margin:12px 0 0;font-size:13px;line-height:1.5}.data-note.ok{color:var(--green);font-weight:600}.data-actions{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.button.danger{background:var(--red-bg);color:var(--coral);border:1px solid var(--red-border);box-shadow:none}.button.danger:hover{background:var(--coral);color:#fff}.page-minimal{padding-top:16px}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.001ms!important;animation-duration:.001ms!important}}@media (width<=768px){:root{--header-h:64px;--bottom-nav-h:74px;--page-pad-x:18px;--quiz-card-pad:20px}aside{display:none}.content{padding-bottom:var(--bottom-offset)}header{justify-content:space-between;padding-left:18px;padding-right:18px}.header-left{display:flex}.header-status{display:none}.icon-btn{width:44px;height:44px}.bottom-nav{z-index:60;background:var(--paper);border-top:1px solid var(--line);padding:8px 4px calc(8px + var(--safe-bottom));justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -4px 16px #0000000a}.bottom-nav a{color:var(--muted);flex:1;justify-items:center;gap:4px;min-height:52px;padding:6px 14px;font-size:11px;display:grid;position:relative}.bottom-nav a.active{color:var(--indigo);font-weight:700}.bottom-nav .nav-badge{min-width:18px;height:18px;font-size:10px;position:absolute;top:2px;right:10px}.page{padding:24px var(--page-pad-x) 60px}.hero{flex-direction:column;align-items:flex-start;gap:20px;padding:28px 24px}.hero h2{font-size:26px}.notes-container{padding:28px 20px;font-size:15.5px}.result-header-panel{padding:24px;display:block}.result-score-block{border-right:0;border-bottom:1px solid var(--line);min-width:0;margin-bottom:24px;padding-bottom:24px;padding-right:0}.module-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.tabs{gap:0}.tabs button{text-align:center;flex:1;padding:14px 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