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auto}.exam-fullscreen-btn-content{display:inline-flex;align-items:center;gap:6px}.exam-fullscreen-icon{width:1em;height:1em;display:inline-flex;flex:0 0 auto}.exam-fullscreen-icon svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}.exam-body{display:grid;grid-template-columns:250px 1fr;grid-template-rows:minmax(0,1fr) auto;gap:12px;min-height:0;height:100%;overflow:hidden}.exam-body.navigator-collapsed{grid-template-columns:88px 1fr}.exam-navigator{background:#fff;border:1px solid #dbe4f1;border-radius:12px;padding:12px;display:grid;grid-template-rows:auto minmax(0,1fr);min-height:0;grid-column:1;grid-row:1 / span 2}.exam-navigator-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}.exam-navigator h3{margin:0;font-size:var(--exam-font-size-xl);line-height:1.25;font-weight:700;color:#0f172a}.exam-navigator-title-icon{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center}.exam-navigator-title-icon svg{width:100%;height:100%;fill:currentColor}.exam-navigator-toggle{border:1px solid #dbe4f1;background:#f8fafc;color:#334155;border-radius:8px;min-width:32px;min-height:32px;padding:0;display:inline-flex;align-items:center;justify-content:center;font-size:1rem;line-height:1}.exam-navigator-toggle:hover{background:#e2e8f0}.exam-navigator-toggle:focus-visible{outline:2px solid #2563eb;outline-offset:2px}.exam-nav-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;overflow:auto;min-height:0;align-content:start;padding-right:4px}.exam-navigator.collapsed .exam-nav-grid{grid-template-columns:1fr}.exam-nav-item{border:1px solid #cbd5e1;border-radius:8px;background:#f8fafc;color:#0f172a;padding:8px 0;font-size:var(--exam-font-size-base);font-weight:700;line-height:1.2;cursor:pointer}.exam-nav-item.status-current{background:#dbeafe;border-color:#2563eb;color:#1e3a8a}.exam-nav-item.status-answered,.exam-nav-item.status-correct{background:#dcfce7;border-color:#16a34a;color:#166534}.exam-nav-item.status-wrong{background:#fee2e2;border-color:#dc2626;color:#991b1b}.exam-nav-item.status-marked_for_review{background:#ccfbf1;border-color:#0f766e;color:#134e4a}.exam-nav-item.status-skipped{background:#fef3c7;border-color:#d97706;color:#92400e}.exam-nav-item.status-not_viewed,.exam-nav-item.status-not_visited{background:#f8fafc;border-color:#cbd5e1;color:#334155}.exam-nav-item:disabled{opacity:1}.exam-question-panel{display:grid;grid-template-rows:minmax(0,1fr);min-height:0;overflow:hidden;grid-column:2;grid-row:1}.exam-question-scroll{overflow:auto;min-height:0;padding-right:4px}.exam-question-item h3{font-size:var(--exam-font-size-xl);line-height:1.25;font-weight:700;margin:0}.exam-question-header{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin:0 0 10px}.exam-question-legend{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:6px}.exam-question-legend-item{display:inline-flex;align-items:center;border:1px solid transparent;border-radius:999px;padding:3px 8px;font-size:.72rem;line-height:1;font-weight:700;white-space:nowrap}.exam-question-legend-item.correct{background:#dcfce7;border-color:#86efac;color:#166534}.exam-question-legend-item.wrong{background:#fee2e2;border-color:#fca5a5;color:#991b1b}.exam-question-legend-item.skipped{background:#fef3c7;border-color:#fcd34d;color:#92400e}.exam-question-legend-item.not_viewed,.exam-question-legend-item.not_visited{background:#f8fafc;border-color:#cbd5e1;color:#334155}.exam-rich-content{color:#111827;font-size:var(--exam-font-size-lg);line-height:1.5}.exam-rich-content p,.exam-rich-content ol,.exam-rich-content ul,.exam-rich-content table{margin:0 0 10px}.exam-rich-content p:last-child,.exam-rich-content ol:last-child,.exam-rich-content ul:last-child,.exam-rich-content table:last-child{margin-bottom:0}.exam-rich-content ol,.exam-rich-content ul{padding-left:1.5rem}.exam-rich-content li{margin-bottom:4px}.exam-rich-content strong{font-weight:700}.exam-rich-content table{width:100%;border-collapse:collapse}.exam-rich-content th,.exam-rich-content td{border:1px solid #dbe4f1;padding:6px 8px;text-align:left}.exam-question-stem{background:#f8fafc;border:1px solid #dbe4f1;border-radius:12px;padding:14px 16px;margin:0 0 12px}.exam-options-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.exam-options-list li{margin:0;padding:0}.exam-option{display:flex;gap:12px;align-items:flex-start;color:#111827;border:1px solid #cbd5e1;border-radius:16px;background:#fff;padding:16px 18px;font-size:var(--exam-font-size-lg);line-height:1.3;font-weight:600;cursor:pointer;transition:border-color .16s ease,background-color .16s ease,box-shadow .16s ease}.exam-option:hover{border-color:#94a3b8;background:#f8fafc}.exam-option input{position:absolute;opacity:0;pointer-events:none}.exam-option.selected{border-color:#22c55e;background:#eaf7f0}.exam-option.correct{border-color:#16a34a;background:#ecfdf3}.exam-option.incorrect{border-color:#ef4444;background:#fef2f2}.exam-option:focus-within{box-shadow:0 0 0 3px #22c55e33}.exam-option-letter{min-width:1.8rem;font-size:var(--exam-font-size-lg);font-weight:700;line-height:1;margin-top:2px;color:#0f172a}.exam-option-content{display:block;flex:1;min-width:0}.exam-option-content p,.exam-option-content ol,.exam-option-content ul{margin-bottom:6px}.exam-option-badge{display:inline-flex;align-items:center;border-radius:999px;border:1px solid transparent;padding:3px 8px;font-size:.72rem;font-weight:700;line-height:1;margin-left:auto}.exam-option-badge.correct{background:#dcfce7;border-color:#86efac;color:#166534}.exam-option-badge.incorrect{background:#fee2e2;border-color:#fca5a5;color:#991b1b}.exam-explanation-panel{margin-top:14px;border:1px solid #dbe4f1;border-radius:12px;background:#f8fafc;padding:12px 14px}.exam-explanation-panel h4{margin:0 0 8px;font-size:var(--exam-font-size-lg);line-height:1.25;font-weight:700;color:#0f172a}.exam-solution-steps{margin-top:10px}.exam-action-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:10px 12px;border:1px solid #dbe4f1;border-radius:12px;background:#eef2ff;margin-top:0;flex:0 0 auto;grid-column:2;grid-row:2}.exam-action-bar button{border-radius:10px;border:1px solid #cbd5e1;background:#fff;color:#0f172a;padding:9px 11px;font-weight:700;font-size:var(--exam-font-size-sm);line-height:1.2;cursor:pointer}.exam-action-bar button:disabled{background:#f8fafc;color:#94a3b8;border-color:#cbd5e1}.exam-result-summary{width:100%;border:1px solid #bfdbfe;border-radius:10px;background:#eff6ff;padding:10px}.exam-result-summary h3{margin:0 0 8px;font-size:.95rem;color:#1e3a8a}.exam-result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:8px}.exam-result-card{border:1px solid #dbeafe;border-radius:8px;background:#fff;padding:8px;display:flex;flex-direction:column;gap:3px}.exam-result-card span{color:#475569;font-size:.72rem}.exam-result-card strong{color:#0f172a;font-size:.95rem}.exam-action-bar .end-practice-btn{background:#fee2e2;border-color:#f87171;color:#991b1b}.exam-action-bar .report-question-btn{background:#ffedd5;border-color:#fb923c;color:#9a3412}.exam-page{height:100vh;max-height:100vh;overflow:hidden;padding:16px;gap:12px}@media (max-width: 980px){.exam-page{padding:10px}.chat-page{display:block;grid-template-columns:1fr}.chat-page.sidebar-collapsed{grid-template-columns:1fr}.sidebar-toggle{display:none}.chat-drawer-toggle{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}.chat-drawer-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a59;opacity:0;pointer-events:none;transition:opacity .18s ease;z-index:50;border:0;padding:0;margin:0}.chat-drawer-backdrop:hover{background:#0f172a59}.chat-drawer-backdrop.is-open{opacity:1;pointer-events:auto}.chat-history.mobile-drawer{position:fixed;top:0;left:0;width:min(80vw,320px);height:100vh;max-height:100vh;transform:translate(-105%);transition:transform .2s ease;z-index:60;border-radius:0 18px 18px 0;box-shadow:0 18px 40px #0f172a38;will-change:transform}.chat-history.mobile-drawer.mobile-open{transform:translate(0)}.chat-history.collapsed{padding:14px}.chat-history,.chat-main{max-height:none}.capabilities-card{padding:12px}.capability-scale{grid-template-columns:1fr;gap:6px}.capability-score{text-align:left}.exam-body{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) auto}.exam-body.navigator-collapsed{grid-template-columns:1fr}.exam-nav-drawer-toggle{display:inline-flex}.exam-nav-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a59;opacity:0;pointer-events:none;transition:opacity .18s ease;z-index:50;border:0;padding:0;margin:0}.exam-nav-backdrop:hover{background:#0f172a59}.exam-nav-backdrop.is-open{opacity:1;pointer-events:auto}.exam-navigator-toggle{display:none}.exam-navigator.mobile-drawer{position:fixed;top:0;left:0;width:min(80vw,var(--exam-nav-drawer-width, 320px));height:100vh;max-height:100vh;transform:translate(-105%);transition:transform .2s ease;z-index:60;border-radius:0 18px 18px 0;box-shadow:0 18px 40px #0f172a38;will-change:transform}.exam-navigator.mobile-drawer.mobile-open{transform:translate(0)}.exam-navigator.mobile-drawer .exam-nav-grid{grid-template-columns:repeat(var(--exam-nav-cols, 3),minmax(0,1fr))}.exam-navigator,.exam-question-panel{grid-column:1;grid-row:1}.exam-action-bar{grid-column:1;grid-row:2}.exam-action-bar{margin-top:10px}.exam-top-row{align-items:flex-start;flex-direction:column}.exam-header-actions{width:100%;justify-content:flex-start;flex-wrap:wrap}.exam-title{font-size:1.2rem}.exam-rich-content{font-size:var(--exam-font-size-base)}.exam-rich-content ol,.exam-rich-content ul{padding-left:1.25rem}.subject-assist{width:100%;margin-top:8px;padding:10px 12px;border:1px solid rgba(148,163,184,.4);border-radius:10px;background:#f8fafce6}.subject-assist-row{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:6px}.subject-assist-label{font-size:.9rem;color:#0f172a}.subject-assist-meta,.subject-assist-status{font-size:.85rem;color:#64748b}.subject-assist-error{font-size:.85rem;color:#b91c1c}}.auth-modal select,.auth-modal input,.auth-modal textarea{width:100%;max-width:100%;box-sizing:border-box}.auth-modal select{min-width:0;border-radius:12px;border:1px solid #cbd5e1;padding:10px 12px;background:#fff;font:inherit;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}