:root{--font-family:"Pretendard", -apple-system, BlinkMacSystemFont, system-ui, Roboto, "Helvetica Neue", "Segoe UI", "Noto Sans KR", sans-serif;--font-size-base:16px;--font-size-sm:.875rem;--font-size-xs:.75rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:1.875rem;--bg-app:#f4f4f5;--bg-card:#fff;--bg-card-subtle:#fafafa;--bg-input:#fff;--bg-hover:#f4f4f5;--border-color:#e4e4e7;--border-focus:#18181b;--text-primary:#18181b;--text-secondary:#52525b;--text-muted:#71717a;--text-inverse:#fff;--primary-color:#18181b;--primary-hover:#27272a;--primary-light:#f4f4f5;--primary-border:#d4d4d8;--success-color:#3f3f46;--success-bg:#f4f4f5;--warning-color:#52525b;--warning-bg:#f4f4f5;--danger-color:#71717a;--danger-bg:#f4f4f5;--ai-purple:#27272a;--ai-purple-light:#f4f4f5;--shadow-sm:0 1px 2px 0 #0000000a;--shadow-md:0 4px 6px -1px #0000000f, 0 2px 4px -2px #0000000a;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000a;--shadow-xl:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000000a;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-full:9999px}html[data-font-size=sm]{--font-size-base:14px}html[data-font-size=md]{--font-size-base:16px}html[data-font-size=lg]{--font-size-base:18px}html[data-font-size=xl]{--font-size-base:20px}html[data-theme=dark]{--bg-app:#09090b;--bg-card:#18181b;--bg-card-subtle:#27272a;--bg-input:#18181b;--bg-hover:#27272a;--border-color:#27272a;--border-focus:#f4f4f5;--text-primary:#f4f4f5;--text-secondary:#a1a1aa;--text-muted:#71717a;--text-inverse:#09090b;--primary-color:#f4f4f5;--primary-hover:#e4e4e7;--primary-light:#27272a;--primary-border:#3f3f46;--success-color:#d4d4d8;--success-bg:#27272a;--warning-color:#a1a1aa;--warning-bg:#27272a;--danger-color:#71717a;--danger-bg:#27272a;--ai-purple:#e4e4e7;--ai-purple-light:#27272a;--shadow-sm:0 1px 2px 0 #00000080;--shadow-md:0 4px 6px -1px #00000080;--shadow-lg:0 10px 15px -3px #0009;--shadow-xl:0 20px 25px -5px #000000b3}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{font-family:var(--font-family);font-size:var(--font-size-base);background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.6;transition:background-color .25s,color .25s}button{font-family:inherit;font-size:inherit;cursor:pointer;background:0 0;border:none}input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}a{color:inherit;text-decoration:none}.app-root{background:var(--bg-app);flex-direction:column;width:100%;min-height:100vh;display:flex}.app-shell{flex-direction:column;flex:1;width:100%;min-height:100vh;display:flex;position:relative}.main-header{background:var(--bg-card);border-bottom:1px solid var(--border-color);z-index:100;box-shadow:var(--shadow-sm);transition:all .2s;position:sticky;top:0}.header-container{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:12px 24px;display:flex}.header-brand{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:12px;display:flex}.brand-logo-icon{background:var(--text-primary);width:42px;height:42px;color:var(--bg-card);border-radius:var(--radius-md);box-shadow:none;flex-shrink:0;justify-content:center;align-items:center;display:flex}.brand-univ-tag{letter-spacing:.8px;color:var(--text-muted);margin-bottom:2px;font-size:.65rem;font-weight:800}.brand-title{letter-spacing:-.5px;color:var(--text-primary);font-size:1.25rem;font-weight:800;line-height:1.2}.brand-subtitle{color:var(--text-muted);font-size:.76rem;font-weight:500}.header-actions{align-items:center;gap:10px;display:flex}.header-action-btn.write-btn{background:var(--primary-color);color:var(--text-inverse);border-radius:var(--radius-md);box-shadow:none;border:1px solid var(--border-color);cursor:pointer;align-items:center;gap:6px;padding:8px 16px;font-size:.88rem;font-weight:600;transition:all .2s;display:flex}.header-action-btn.write-btn:hover{background:var(--primary-hover);transform:translateY(-1px)}.header-icon-btn{border-radius:var(--radius-md);width:38px;height:38px;color:var(--text-secondary);background:var(--bg-card-subtle);border:1px solid var(--border-color);cursor:pointer;justify-content:center;align-items:center;transition:all .2s;display:flex;position:relative}.header-icon-btn:hover,.header-icon-btn.active{color:var(--text-primary);background:var(--bg-hover);border-color:var(--border-focus)}.header-notif-dot{background:var(--text-primary);color:var(--bg-card);border-radius:var(--radius-full);border:2px solid var(--bg-card);justify-content:center;align-items:center;min-width:18px;height:18px;font-size:.7rem;font-weight:700;display:flex;position:absolute;top:-4px;right:-4px}.user-profile-menu-container{position:relative}.header-user-chip{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-full);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding:5px 12px 5px 7px;transition:all .2s;display:flex}.header-user-chip:hover,.header-user-chip.active{background:var(--bg-hover);border-color:var(--border-focus)}.chip-avatar{background:var(--text-primary);width:26px;height:26px;color:var(--bg-card);border-radius:50%;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;line-height:1;display:inline-flex}.chip-details{flex-direction:column;display:flex}.chip-name{color:var(--text-primary);font-size:.85rem;font-weight:700;line-height:1.1}.chip-role{color:var(--text-muted);font-size:.72rem}.chip-chevron{color:var(--text-muted);margin-left:2px;transition:transform .2s}.chip-chevron.rotated{transform:rotate(180deg)}.user-account-dropdown{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);z-index:1000;width:320px;animation:.2s fadeInDown;position:absolute;top:calc(100% + 8px);right:0;overflow:hidden;box-shadow:0 10px 25px #00000026}.current-user-card{background:var(--bg-card-subtle);align-items:center;gap:12px;padding:16px;display:flex}.card-avatar-large{background:var(--text-primary);width:44px;height:44px;color:var(--bg-card);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:1.25rem;font-weight:700;display:flex}.card-info{flex:1;min-width:0}.card-name-row{align-items:center;gap:8px;display:flex}.card-name{color:var(--text-primary);font-size:1rem;font-weight:700}.card-role-badge{border-radius:var(--radius-full);padding:2px 7px;font-size:.7rem;font-weight:700}.card-role-badge.prof-badge{background:var(--text-primary);color:var(--bg-card)}.card-role-badge.student-badge{background:var(--bg-hover);color:var(--text-secondary);border:1px solid var(--border-color)}.card-sub-info{color:var(--text-secondary);margin-top:2px;font-size:.78rem}.card-login-status{color:var(--text-muted);align-items:center;gap:4px;margin-top:4px;font-size:.72rem;font-weight:600;display:flex}.status-shield-icon{flex-shrink:0}.account-dropdown-divider{background:var(--border-color);height:1px}.account-switcher-section{max-height:280px;padding:12px 14px;overflow-y:auto}.switcher-header{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;align-items:center;gap:6px;margin-bottom:10px;font-size:.75rem;font-weight:700;display:flex}.account-group{margin-bottom:12px}.account-group:last-child{margin-bottom:0}.group-title{color:var(--text-muted);margin-bottom:4px;padding:2px 8px;font-size:.72rem;font-weight:700}.account-switch-item{border-radius:var(--radius-md);cursor:pointer;text-align:left;background:0 0;border:1px solid #0000;align-items:center;gap:10px;width:100%;padding:8px 10px;transition:all .15s;display:flex}.account-switch-item:hover{background:var(--bg-hover)}.account-switch-item.selected{background:var(--primary-light);border-color:var(--primary-border)}.switch-item-avatar{background:var(--text-primary);width:26px;height:26px;color:var(--bg-card);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;line-height:1;display:inline-flex}.switch-item-details{flex:1;min-width:0}.switch-item-name{color:var(--text-primary);font-size:.85rem;font-weight:700;display:block}.switch-item-meta{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.74rem;display:block;overflow:hidden}.switch-item-check{color:var(--primary-color);flex-shrink:0}.dropdown-footer-actions{background:var(--bg-card-subtle);padding:10px 14px}.dropdown-footer-btn{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-secondary);cursor:pointer;justify-content:center;align-items:center;gap:6px;padding:8px 12px;font-size:.78rem;font-weight:600;transition:all .2s;display:flex}.dropdown-footer-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.notif-wrapper{position:relative}.notif-dropdown{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:360px;max-width:90vw;box-shadow:var(--shadow-xl);z-index:500;animation:.2s ease-out fadeInDown;position:absolute;top:calc(100% + 10px);right:0;overflow:hidden}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.notif-header{background:var(--bg-card-subtle);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.notif-title{color:var(--text-primary);align-items:center;gap:8px;font-size:.95rem;font-weight:700;display:flex}.unread-badge{color:#fff;border-radius:var(--radius-full);background:#ef4444;padding:2px 7px;font-size:.75rem;font-weight:700}.mark-all-read-btn{color:var(--primary-color);align-items:center;gap:4px;font-size:.78rem;font-weight:600;display:flex}.mark-all-read-btn:hover{text-decoration:underline}.dnd-notice-banner{color:#92400e;background:#fef3c7;border-bottom:1px solid #fde68a;gap:8px;padding:10px 14px;font-size:.8rem;display:flex}html[data-theme=dark] .dnd-notice-banner{color:#fde68a;background:#451a03;border-bottom-color:#78350f}.notif-list{max-height:380px;overflow-y:auto}.notif-empty{text-align:center;color:var(--text-muted);flex-direction:column;align-items:center;gap:8px;padding:40px 20px;font-size:.9rem;display:flex}.notif-item{border-bottom:1px solid var(--border-color);cursor:pointer;padding:12px 16px;transition:background .15s}.notif-item:hover{background:var(--bg-hover)}.notif-item.unread{background:var(--primary-light);border-left:4px solid var(--primary-color)}.notif-item-header{justify-content:space-between;align-items:center;margin-bottom:4px;display:flex}.notif-type-tag{border-radius:var(--radius-sm);padding:2px 6px;font-size:.72rem;font-weight:700}.notif-type-tag.new_answer{background:var(--success-bg);color:var(--success-color)}.notif-type-tag.new_question{background:var(--primary-light);color:var(--primary-color)}.notif-type-tag.co_prof_question{background:var(--warning-bg);color:var(--warning-color)}.notif-time{color:var(--text-muted);font-size:.72rem}.notif-item-title{color:var(--text-primary);margin-bottom:2px;font-size:.88rem;font-weight:700}.notif-item-message{color:var(--text-secondary);font-size:.8rem;line-height:1.4}.main-content-area{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:24px}.btn{border-radius:var(--radius-md);justify-content:center;align-items:center;gap:8px;padding:9px 18px;font-size:.95rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:var(--primary-color);color:var(--text-inverse);border:1px solid var(--border-color)}.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--shadow-sm)}.btn-secondary{background:var(--bg-card-subtle);color:var(--text-secondary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-outline{border:1px solid var(--border-color);color:var(--text-primary);background:0 0}.btn-outline:hover{background:var(--bg-hover)}.cat-pill{border-radius:var(--radius-sm);align-items:center;padding:3px 9px;font-size:.76rem;font-weight:700;display:inline-flex}.cat-pill.badge-grade{background:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border-color)}.cat-pill.badge-assignment{background:var(--bg-card-subtle);color:var(--text-secondary);border:1px solid var(--border-color)}.cat-pill.badge-lecture{background:var(--text-primary);color:var(--bg-card);border:1px solid var(--text-primary)}.course-tag{color:var(--text-secondary);background:var(--bg-card-subtle);border-radius:var(--radius-sm);border:1px solid var(--border-color);padding:3px 8px;font-size:.8rem;font-weight:600}.ai-applied-tag{color:var(--text-secondary);background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-sm);align-items:center;gap:3px;padding:2px 7px;font-size:.72rem;font-weight:600;display:inline-flex}html[data-theme=dark] .ai-applied-tag{color:var(--text-secondary);background:var(--bg-card-subtle);border-color:var(--border-color)}.student-banner-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;padding:22px 24px;display:flex}.student-banner-left{align-items:center;gap:16px;display:flex}.student-avatar-box{background:var(--text-primary);width:52px;height:52px;color:var(--bg-card);border-radius:var(--radius-full);border:none;justify-content:center;align-items:center;font-size:1.4rem;font-weight:700;display:flex}.student-info-meta h3{color:var(--text-primary);margin-bottom:4px;font-size:1.25rem;font-weight:800}.student-sub{color:var(--text-muted);font-size:.85rem}.new-q-btn{box-shadow:none}.list-controls-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.search-input-wrap{flex:1;min-width:240px;position:relative}.search-icon{color:var(--text-muted);position:absolute;top:50%;left:12px;transform:translateY(-50%)}.search-input{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-primary);outline:none;padding:10px 14px 10px 38px;font-size:.9rem;transition:border .2s}.search-input:focus{border-color:var(--border-focus)}.filter-group-right{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.student-tabs{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:3px;display:flex}.student-tab{color:var(--text-secondary);border-radius:var(--radius-sm);padding:7px 14px;font-size:.85rem;font-weight:600;transition:all .2s}.student-tab.active{background:var(--bg-card);color:var(--primary-color);box-shadow:var(--shadow-sm)}.category-select-wrap,.category-filter-select{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);align-items:center;gap:6px;padding:6px 12px;display:flex}.cat-select{color:var(--text-primary);cursor:pointer;background:0 0;border:none;outline:none;font-size:.85rem;font-weight:600}.questions-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:18px;display:grid}.question-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;box-shadow:var(--shadow-sm);flex-direction:column;padding:20px;transition:all .22s cubic-bezier(.16,1,.3,1);display:flex}.question-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-focus);transform:translateY(-2px)}.card-top-row{justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px;display:flex}.card-tags-left{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.card-status-right{align-items:center;gap:6px;display:flex}.status-badge{border-radius:var(--radius-sm);align-items:center;gap:4px;padding:3px 8px;font-size:.75rem;font-weight:700;display:inline-flex}.status-badge.answered{background:var(--text-primary);color:var(--bg-card)}.status-badge.waiting{background:var(--bg-hover);color:var(--text-secondary);border:1px solid var(--border-color)}.co-prof-action-badge{background:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);align-items:center;gap:4px;padding:2px 7px;font-size:.72rem;font-weight:700;display:inline-flex}html[data-theme=dark] .co-prof-action-badge{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-color)}.card-title{color:var(--text-primary);margin-bottom:8px;font-size:1.05rem;font-weight:700;line-height:1.4}.card-snippet{color:var(--text-secondary);flex:1;margin-bottom:16px;font-size:.88rem;line-height:1.5}.card-bottom-row{color:var(--text-muted);border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;padding-top:12px;font-size:.78rem;display:flex}.card-author{align-items:center;gap:6px;display:flex}.author-anon,.author-real{color:var(--text-secondary);align-items:center;gap:4px;font-weight:600;display:inline-flex}.author-anon{color:var(--text-muted)}.empty-state-box{text-align:center;background:var(--bg-card);border:1px dashed var(--border-color);border-radius:var(--radius-lg);color:var(--text-muted);flex-direction:column;align-items:center;gap:12px;padding:60px 20px;display:flex}.question-form-container{max-width:840px;margin:0 auto}.form-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:32px}.form-header{border-bottom:1px solid var(--border-color);margin-bottom:24px;padding-bottom:18px}.form-header-title{align-items:center;gap:10px;margin-bottom:6px;display:flex}.form-header-title h3{color:var(--text-primary);font-size:1.35rem;font-weight:800}.form-header-subtitle{color:var(--text-muted);font-size:.88rem}.form-error-banner{background:var(--danger-bg);color:var(--danger-color);border-radius:var(--radius-md);align-items:center;gap:8px;margin-bottom:20px;padding:10px 14px;font-size:.88rem;font-weight:600;display:flex}.form-group{margin-bottom:22px}.form-label{color:var(--text-primary);margin-bottom:8px;font-size:.95rem;font-weight:700;display:block}.req{color:#ef4444}.course-select-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;display:grid}.course-chip{background:var(--bg-card-subtle);border:2px solid var(--border-color);border-radius:var(--radius-md);text-align:left;flex-direction:column;padding:10px 14px;transition:all .2s;display:flex}.course-chip:hover{border-color:var(--primary-border)}.course-chip.active{background:var(--primary-light);border-color:var(--primary-color)}.course-name{color:var(--text-primary);font-size:.95rem;font-weight:700}.course-prof{color:var(--text-muted);margin-top:2px;font-size:.8rem}.label-with-rule{flex-wrap:wrap;justify-content:space-between;align-items:baseline;margin-bottom:8px;display:flex}.cat-rule-summary{color:var(--text-muted);font-size:.8rem}.category-select-grid{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}@media (width<=640px){.category-select-grid{grid-template-columns:1fr}}.category-select-card{background:var(--bg-card-subtle);border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;flex-direction:column;padding:14px;transition:all .2s;display:flex}.category-select-card:hover:not(.disabled-cat){border-color:var(--primary-border)}.category-select-card.selected{background:var(--bg-card);border-color:var(--primary-color);box-shadow:0 0 0 1px var(--primary-color)}.category-select-card.disabled-cat{opacity:.55;cursor:not-allowed;filter:grayscale(.5)}.cat-select-top{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.cat-inactive-tag{color:#ef4444;background:#fee2e2;border-radius:4px;padding:2px 6px;font-size:.72rem;font-weight:700}.selected-check{color:var(--primary-color)}.cat-desc-text{color:var(--text-secondary);flex:1;margin-bottom:8px;font-size:.82rem;line-height:1.4}.cat-constraints-info{border-top:1px dashed var(--border-color);padding-top:6px;font-size:.72rem;font-weight:600}.constraint-warn{color:var(--text-primary);font-weight:700}.constraint-info{color:var(--text-secondary)}.constraint-ok{color:var(--text-muted)}.input-text{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);outline:none;width:100%;padding:11px 14px;font-size:.95rem;transition:border .2s}.input-text:focus{border-color:var(--border-focus)}.similar-detect-banner{border-radius:var(--radius-md);background:#f0fdf4;border:1px solid #bbf7d0;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;padding:12px 16px;display:flex}html[data-theme=dark] .similar-detect-banner{background:#064e3b;border-color:#047857}.detect-text{color:#166534;align-items:center;gap:8px;font-size:.88rem;display:flex}html[data-theme=dark] .detect-text{color:#a7f3d0}.btn-view-similar{color:#fff;border-radius:var(--radius-sm);background:#16a34a;padding:6px 12px;font-size:.82rem;font-weight:700;transition:background .2s}.btn-view-similar:hover{background:#15803d}.title-label-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px;display:flex}.btn-ai-assist-inline{background:var(--bg-hover);color:var(--text-primary);border-radius:var(--radius-sm);box-shadow:none;cursor:pointer;border:1px solid var(--border-color);align-items:center;gap:5px;padding:4px 10px;font-size:.76rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-ai-assist-inline:hover{background:var(--border-color)}.content-label-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px;display:flex}.content-toolbar-actions{align-items:center;gap:8px;display:flex}.btn-ai-assist{background:var(--text-primary);color:var(--bg-card);border-radius:var(--radius-md);box-shadow:none;border:1px solid var(--border-color);align-items:center;gap:6px;padding:6px 12px;font-size:.82rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-ai-assist:hover{background:var(--primary-hover)}.btn-ai-assist.refined-active{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-focus)}.btn-similar-search{background:var(--bg-card-subtle);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:var(--radius-md);align-items:center;gap:6px;padding:6px 12px;font-size:.82rem;font-weight:600;display:inline-flex}.btn-similar-search:disabled{opacity:.4;cursor:not-allowed}.textarea-content{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);resize:vertical;outline:none;width:100%;padding:14px;font-size:.95rem;line-height:1.6;transition:border .2s}.textarea-content:focus{border-color:var(--border-focus)}.textarea-content.has-refined-border{border-color:var(--border-focus);background:var(--bg-card)}.refined-status-hint{color:var(--text-secondary);align-items:center;gap:6px;margin-top:6px;font-size:.8rem;font-weight:500;display:flex}.anonymous-group{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:16px}.checkbox-label{cursor:pointer;color:var(--text-primary);-webkit-user-select:none;user-select:none;align-items:center;gap:8px;font-size:.95rem;font-weight:700;display:inline-flex}.checkbox-label input[type=checkbox]{cursor:pointer;width:18px;height:18px}.checkbox-label.disabled-label{opacity:.5;cursor:not-allowed}.checkbox-text{align-items:center;gap:6px;display:inline-flex}.anon-disabled-reason{color:#ef4444;margin-top:6px;font-size:.8rem;font-weight:600;display:block}.anon-rule-desc{color:var(--text-muted);margin-top:6px;font-size:.82rem;line-height:1.4;display:block}.form-submit-row{justify-content:flex-end;align-items:center;gap:12px;margin-top:28px;display:flex}.submit-btn{padding:11px 26px}.prof-welcome-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;padding:24px;display:flex}.prof-welcome-left{align-items:center;gap:16px;display:flex}.prof-avatar-box{background:var(--primary-light);border-radius:var(--radius-full);border:2px solid var(--primary-border);justify-content:center;align-items:center;width:56px;height:56px;font-size:2rem;display:flex}.prof-name-badge{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:4px;display:flex}.prof-name{color:var(--text-primary);font-size:1.3rem;font-weight:800}.prof-badge{background:var(--primary-color);color:#fff;border-radius:4px;padding:2px 7px;font-size:.72rem;font-weight:700}.prof-dept{color:var(--text-muted);font-size:.85rem}.prof-courses-list{color:var(--text-secondary);font-size:.85rem}.prof-quick-controls{align-items:center;gap:10px;display:flex}.prof-control-btn{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:var(--radius-md);align-items:center;gap:6px;padding:9px 14px;font-size:.85rem;font-weight:600;transition:all .2s;display:inline-flex}.prof-control-btn:hover{background:var(--bg-hover);color:var(--primary-color);border-color:var(--primary-border)}.prof-control-btn.dnd-on{color:#b45309;background:#fef3c7;border-color:#f59e0b}.prof-stats-grid{grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px;display:grid}@media (width<=900px){.prof-stats-grid{grid-template-columns:repeat(2,1fr)}}.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;align-items:center;gap:14px;padding:18px 20px;transition:all .2s;display:flex}.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.stat-card.highlight{border-color:var(--primary-color);background:var(--primary-light)}.stat-icon{border-radius:var(--radius-md);justify-content:center;align-items:center;width:44px;height:44px;display:flex}.stat-icon.warn{background:var(--warning-bg);color:var(--warning-color)}.stat-icon.primary{background:var(--primary-light);color:var(--primary-color)}.stat-icon.info{color:#16a34a;background:#f0fdf4}.stat-icon.normal{background:var(--bg-card-subtle);color:var(--text-muted)}.stat-content{flex-direction:column;display:flex}.stat-label{color:var(--text-muted);font-size:.8rem;font-weight:600}.stat-value{color:var(--text-primary);font-size:1.35rem;font-weight:800;line-height:1.2}.dashboard-filters-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.filter-tabs{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-wrap:wrap;gap:2px;padding:3px;display:flex}.filter-tab{color:var(--text-secondary);border-radius:var(--radius-sm);padding:7px 14px;font-size:.85rem;font-weight:600;transition:all .2s}.filter-tab.active{background:var(--bg-card);color:var(--primary-color);box-shadow:var(--shadow-sm)}.question-detail-container{max-width:900px;margin:0 auto}.detail-top-nav{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.btn-back{color:var(--text-secondary);border-radius:var(--radius-sm);background:var(--bg-card-subtle);border:1px solid var(--border-color);align-items:center;gap:6px;padding:6px 12px;font-size:.9rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-back:hover{color:var(--primary-color);background:var(--bg-hover)}.btn-edit-question{background:var(--bg-card);color:var(--primary-color);border:1px solid var(--primary-color);border-radius:var(--radius-md);align-items:center;gap:6px;padding:7px 14px;font-size:.88rem;font-weight:700;transition:all .2s;display:inline-flex;box-shadow:0 1px 3px #2563eb26}.btn-edit-question:hover{background:var(--primary-light);transform:translateY(-1px);box-shadow:0 3px 6px #2563eb40}.edited-badge{color:#0284c7;border-radius:var(--radius-full);background:#e0f2fe;border:1px solid #bae6fd;align-items:center;gap:3px;padding:2px 7px;font-size:.72rem;font-weight:700;display:inline-flex}html[data-theme=dark] .edited-badge{color:#7dd3fc;background:#082f49;border-color:#0369a1}.meta-updated-time{color:var(--text-muted);font-size:.78rem;font-style:italic}.detail-main-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:32px}.detail-header{border-bottom:1px solid var(--border-color);margin-bottom:24px;padding-bottom:20px}.detail-badges{align-items:center;gap:8px;margin-bottom:12px;display:flex}.detail-title{color:var(--text-primary);margin-bottom:12px;font-size:1.45rem;font-weight:800;line-height:1.35}.detail-meta-row{color:var(--text-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;font-size:.85rem;display:flex}.meta-author-info{align-items:center;gap:8px;display:flex}.meta-author.anon{color:#4f46e5;font-weight:600}.meta-author.real{color:var(--text-primary);font-weight:600}.meta-divider{color:var(--border-color)}.meta-prof{font-weight:500}.detail-content-body{color:var(--text-primary);margin-bottom:32px;font-size:1rem;line-height:1.7}.detail-text{white-space:pre-wrap;margin-bottom:20px}.question-edit-panel{background:var(--bg-card);border-radius:var(--radius-md)}.edit-panel-header{border-bottom:2px solid var(--primary-light);justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:14px;display:flex}.edit-title-group{align-items:center;gap:8px;display:flex}.edit-title-group h3{color:var(--text-primary);font-size:1.25rem;font-weight:800}.edit-icon{color:var(--primary-color)}.btn-cancel-edit-icon{color:var(--text-muted);border-radius:var(--radius-sm);padding:4px;transition:all .15s}.btn-cancel-edit-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.edit-category-chips{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}@media (width<=640px){.edit-category-chips{grid-template-columns:1fr}}.cat-chip-btn{background:var(--bg-card-subtle);border:2px solid var(--border-color);border-radius:var(--radius-md);text-align:left;flex-direction:column;gap:4px;padding:10px 12px;transition:all .2s;display:flex}.cat-chip-btn:hover{border-color:var(--primary-border)}.cat-chip-btn.active{background:var(--primary-light);border-color:var(--primary-color)}.cat-chip-name{color:var(--text-muted);font-size:.78rem}.edit-actions-row{border-top:1px solid var(--border-color);justify-content:flex-end;align-items:center;gap:12px;margin-top:24px;padding-top:18px;display:flex}.original-diff-box.author-only-box{border-radius:var(--radius-md);background:#fdf4ff;border:1px dashed #d946ef;margin-top:18px;padding:14px 16px}html[data-theme=dark] .original-diff-box.author-only-box{background:#2e1065;border-color:#a21caf}.diff-privacy-tag{color:#a21caf;border-radius:var(--radius-sm);background:#d946ef1f;align-items:center;gap:5px;margin-bottom:8px;padding:3px 8px;font-size:.75rem;font-weight:700;display:inline-flex}html[data-theme=dark] .diff-privacy-tag{color:#f0abfc;background:#d946ef40}.btn-toggle-original{color:var(--text-primary);align-items:center;gap:6px;font-size:.85rem;font-weight:700;display:inline-flex}.btn-toggle-original:hover{text-decoration:underline}.original-diff-content{border-top:1px solid var(--border-color);margin-top:10px;padding-top:10px}.diff-label{color:var(--text-muted);margin-bottom:4px;font-size:.78rem;font-weight:700;display:block}.diff-text{color:#b91c1c;background:var(--danger-bg);border-radius:var(--radius-sm);padding:8px 12px;font-size:.9rem;font-style:italic;line-height:1.5}.diff-note{color:#a21caf;margin-top:6px;font-size:.78rem;font-weight:500;display:block}html[data-theme=dark] .diff-note{color:#e879f9}.detail-answers-section{border-top:2px solid var(--border-color);margin-bottom:32px;padding-top:24px}.answers-section-header{margin-bottom:16px}.answers-header-title{color:var(--text-primary);align-items:center;gap:8px;font-size:1.15rem;font-weight:800;display:flex}.no-answers-box{background:var(--bg-card-subtle);border-radius:var(--radius-md);text-align:center;color:var(--text-muted);flex-direction:column;align-items:center;gap:8px;padding:30px;display:flex}.answer-item-card{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-left:4px solid var(--primary-color);border-radius:var(--radius-md);margin-bottom:14px;padding:18px 20px}.answer-card-header{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.ans-author-meta{align-items:center;gap:8px;display:flex}.ans-role-tag{border-radius:var(--radius-sm);padding:2px 7px;font-size:.72rem;font-weight:700}.ans-role-tag.primary{background:var(--primary-light);color:var(--primary-color)}.ans-role-tag.co-prof{color:#16a34a;background:#f0fdf4}.ans-timestamp{color:var(--text-muted);font-size:.78rem}.answer-card-content{color:var(--text-primary);white-space:pre-wrap;font-size:.95rem;line-height:1.6}.detail-prof-action-section{border-top:2px solid var(--border-color);padding-top:24px}.prof-action-title{color:var(--text-primary);margin-bottom:14px;font-size:1.1rem;font-weight:800}.answer-form-box{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:18px}.prof-permission-banner{border-radius:var(--radius-sm);align-items:center;gap:8px;margin-bottom:14px;padding:10px 14px;font-size:.88rem;font-weight:600;display:flex}.prof-permission-banner.primary{background:var(--primary-light);color:var(--primary-color)}.prof-permission-banner.co-prof-active{color:#065f46;background:#ecfdf5;border:1px solid #a7f3d0}.prof-permission-banner.locked{color:#991b1b;background:#fef2f2;border:1px solid #fecaca}.prof-permission-banner.unauthorized{color:#64748b;background:#f1f5f9}.ans-author-preview{color:var(--text-muted);margin-bottom:8px;font-size:.85rem;display:block}.ans-textarea{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);resize:vertical;outline:none;width:100%;padding:12px;font-size:.95rem;line-height:1.6}.ans-textarea:focus{border-color:var(--border-focus)}.ans-submit-row{justify-content:flex-end;margin-top:12px;display:flex}.ans-disabled-notice{text-align:center;color:var(--text-muted);flex-direction:column;align-items:center;gap:8px;padding:24px;display:flex}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#0009;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);flex-direction:column;width:100%;max-width:600px;max-height:90vh;animation:.2s cubic-bezier(.16,1,.3,1) modalScale;display:flex;overflow:hidden}@keyframes modalScale{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:18px 24px;display:flex}.modal-title{color:var(--text-primary);align-items:center;gap:10px;font-size:1.15rem;font-weight:800;display:flex}.modal-close-btn{color:var(--text-muted);border-radius:var(--radius-sm);padding:4px}.modal-close-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.modal-body{flex:1;padding:24px;overflow-y:auto}.modal-footer{border-top:1px solid var(--border-color);background:var(--bg-card-subtle);justify-content:flex-end;align-items:center;gap:12px;padding:16px 24px;display:flex}.modal-content.ai-modal{max-width:860px}.refine-icon-wrap{color:var(--text-primary);align-items:center;display:flex}.ai-icon-pulse{color:var(--text-primary)}.ai-quick-templates{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px;padding:10px 14px;display:flex}.template-label{color:var(--text-secondary);font-size:.82rem;font-weight:700}.template-chips{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.template-chip-btn{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:var(--radius-sm);padding:4px 10px;font-size:.78rem;font-weight:600;transition:all .2s}.template-chip-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-focus)}.ai-compare-grid{grid-template-columns:1fr 36px 1fr;align-items:stretch;gap:12px;margin-bottom:16px;display:grid}@media (width<=768px){.ai-compare-grid{grid-template-columns:1fr}.compare-arrow{display:none}}.compare-card{border:1px solid var(--border-color);border-radius:var(--radius-md);flex-direction:column;display:flex;overflow:hidden}.compare-header{background:var(--bg-card-subtle);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.compare-tag{border-radius:4px;padding:2px 8px;font-size:.8rem;font-weight:700}.origin-tag{background:var(--bg-hover);color:var(--text-secondary);border:1px solid var(--border-color)}.ai-tag{background:var(--text-primary);color:var(--bg-card);align-items:center;gap:4px;display:inline-flex}.polite-score-badge{background:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border-color);border-radius:4px;margin-left:6px;padding:2px 6px;font-size:.75rem;font-weight:700}.re-run-btn,.edit-toggle-btn{color:var(--text-secondary);align-items:center;gap:4px;font-size:.75rem;font-weight:600;display:inline-flex}.re-run-btn:hover,.edit-toggle-btn:hover{color:var(--text-primary)}.compare-arrow{justify-content:center;align-items:center;display:flex}.arrow-circle{background:var(--bg-card-subtle);border:1px solid var(--border-color);width:32px;height:32px;color:var(--text-muted);border-radius:50%;justify-content:center;align-items:center;display:flex}.compare-card-body{background:var(--bg-card);flex-direction:column;flex:1;gap:12px;padding:12px 14px;display:flex}.compare-field-wrap{flex-direction:column;gap:5px;display:flex}.ai-sub-label{color:var(--text-muted);font-size:.76rem;font-weight:700}.ai-title-input{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);width:100%;color:var(--text-primary);outline:none;padding:8px 12px;font-size:.9rem;font-weight:600;transition:border-color .2s,box-shadow .2s}.ai-title-input:focus{border-color:var(--border-focus)}.ai-title-input.refined-title-input{background:var(--bg-card-subtle);border-color:var(--border-color);color:var(--text-primary);font-weight:700}.ai-title-input.refined-title-input.editable{background:var(--bg-input);border-color:var(--border-focus)}.has-refined-border{box-shadow:none;border-color:var(--border-focus)!important}.ai-textarea{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);resize:vertical;outline:none;width:100%;padding:10px 12px;font-size:.9rem;line-height:1.6;transition:border-color .2s}.ai-textarea:focus{border-color:var(--border-focus)}.refined-textarea:not(.editable){background:var(--bg-card-subtle);color:var(--text-primary)}.refined-textarea.editable{background:var(--bg-input);border-color:var(--border-focus)}.ai-loading-box,.ai-empty-prompt{text-align:center;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:50px 20px;font-size:.88rem;display:flex}.ai-spinner{color:var(--text-primary)}.spinning{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.ai-improvements-box{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:14px;padding:12px 16px}html[data-theme=dark] .ai-improvements-box{background:var(--bg-card-subtle);border-color:var(--border-color)}.improv-title{color:var(--text-primary);align-items:center;gap:6px;margin-bottom:6px;font-size:.85rem;font-weight:700;display:flex}html[data-theme=dark] .improv-title{color:var(--text-primary)}.improv-list{color:var(--text-secondary);padding-left:20px;font-size:.82rem}.ai-disclaimer{color:var(--text-secondary);background:var(--bg-card-subtle);border-radius:var(--radius-sm);border:1px solid var(--border-color);align-items:center;gap:8px;padding:10px 14px;font-size:.8rem;display:flex}html[data-theme=dark] .ai-disclaimer{background:var(--bg-card-subtle);color:var(--text-secondary);border-color:var(--border-color)}.btn-ai-apply{background:var(--primary-color);color:var(--text-inverse);border-radius:var(--radius-md);box-shadow:none;border:1px solid var(--border-color);padding:9px 20px;font-weight:700}.modal-content.similar-modal{max-width:780px}.similar-query-banner{background:var(--bg-card-subtle);border-radius:var(--radius-md);margin-bottom:16px;padding:12px 16px}.query-label{color:var(--text-muted);margin-bottom:4px;font-size:.78rem;font-weight:700;display:block}.query-snippet{color:var(--primary-color);font-size:.92rem;font-weight:600}.similar-intro{color:var(--text-secondary);margin-bottom:18px;font-size:.88rem;line-height:1.5}.similar-accordion-card{border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden}.accordion-summary{background:var(--bg-card);cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;transition:background .15s;display:flex}.accordion-summary:hover{background:var(--bg-hover)}.summary-left{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.sim-score-badge{white-space:nowrap;border-radius:4px;padding:3px 8px;font-size:.75rem;font-weight:800}.sim-score-badge.high{color:#166534;background:#dcfce7}.sim-score-badge.medium{color:#92400e;background:#fef3c7}.sim-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:.92rem;font-weight:700;overflow:hidden}.summary-right{white-space:nowrap;align-items:center;gap:8px;display:flex}.sim-ans-status{border-radius:4px;padding:2px 7px;font-size:.75rem;font-weight:600}.sim-ans-status.answered{background:var(--success-bg);color:var(--success-color)}.sim-ans-status.waiting{background:var(--warning-bg);color:var(--warning-color)}.accordion-details{background:var(--bg-card-subtle);border-top:1px solid var(--border-color);padding:16px 20px}.sim-detail-label{color:var(--text-muted);align-items:center;gap:6px;margin-bottom:6px;font-size:.8rem;font-weight:700;display:flex}.sim-question-text{color:var(--text-primary);background:var(--bg-card);border-radius:var(--radius-sm);margin-bottom:14px;padding:10px;font-size:.9rem;line-height:1.5}.sim-answer-bubble{background:var(--bg-card);border:1px solid var(--border-color);border-left:3px solid var(--primary-color);border-radius:var(--radius-sm);margin-bottom:12px;padding:12px 14px}.sim-ans-header{align-items:center;gap:8px;margin-bottom:6px;font-size:.82rem;display:flex}.ans-tag{color:var(--primary-color);font-size:.72rem}.ans-date{color:var(--text-muted);margin-left:auto;font-size:.72rem}.sim-ans-body{color:var(--text-primary);font-size:.88rem;line-height:1.5}.sim-resolve-bar{border-top:1px dashed var(--border-color);color:var(--text-secondary);justify-content:space-between;align-items:center;gap:12px;padding-top:10px;font-size:.85rem;display:flex}.btn-resolve{color:#fff;border-radius:var(--radius-sm);background:#10b981;padding:6px 14px;font-size:.82rem;font-weight:700}.btn-resolve:hover{background:#059669}.prof-settings-modal{max-width:620px}.modal-intro-text{color:var(--text-secondary);margin-bottom:20px;font-size:.88rem;line-height:1.5}.settings-card-item{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:16px;padding:18px}.settings-row-between{justify-content:space-between;align-items:center;gap:16px;display:flex}.item-title{color:var(--text-primary);margin-bottom:4px;font-size:.98rem;font-weight:700;display:block}.item-title-with-badge{align-items:center;gap:8px;margin-bottom:4px;display:flex}.item-desc{color:var(--text-muted);font-size:.82rem;line-height:1.4}.time-range-inputs{border-top:1px dashed var(--border-color);align-items:center;gap:12px;margin-top:14px;padding-top:14px;display:flex}.time-field{flex-direction:column;gap:4px;display:flex}.time-label{color:var(--text-muted);font-size:.75rem;font-weight:600}.time-picker{background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);padding:6px 10px;font-weight:600}.time-separator{color:var(--text-muted);margin-top:18px;font-weight:700}.backend-spec-notice{color:var(--primary-color);background:var(--primary-light);border-radius:var(--radius-sm);align-items:center;gap:8px;margin-top:16px;padding:10px 14px;font-size:.8rem;display:flex}.category-toggle-list{flex-direction:column;gap:12px;margin-bottom:18px;display:flex}.category-toggle-card{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);justify-content:space-between;align-items:center;gap:16px;padding:16px;display:flex}.category-toggle-card.disabled{opacity:.6}.cat-card-info{flex:1}.cat-badge-wrap{align-items:center;gap:8px;margin-bottom:6px;display:flex}.cat-status-badge{color:var(--text-muted);font-size:.72rem;font-weight:700}.cat-card-desc{color:var(--text-secondary);margin-bottom:6px;font-size:.85rem}.cat-rule-hints{color:var(--text-muted);font-size:.75rem;list-style:none}.switch{flex-shrink:0;width:46px;height:24px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:#cbd5e1;border-radius:24px;transition:all .3s;position:absolute;inset:0}html[data-theme=dark] .slider{background-color:#475569}.slider:before{content:"";background-color:#fff;border-radius:50%;width:18px;height:18px;transition:all .3s;position:absolute;bottom:3px;left:3px}input:checked+.slider{background-color:var(--primary-color)}input:checked+.slider:before{transform:translate(22px)}.settings-section{margin-bottom:24px}.section-label{color:var(--text-primary);margin-bottom:4px;font-size:.95rem;font-weight:700;display:block}.section-desc{color:var(--text-muted);margin-bottom:12px;font-size:.82rem}.theme-toggle-cards{grid-template-columns:1fr 1fr;gap:12px;display:grid}.theme-card{background:var(--bg-card-subtle);border:2px solid var(--border-color);border-radius:var(--radius-md);text-align:left;padding:16px;transition:all .2s;position:relative}.theme-card.selected{background:var(--bg-card);border-color:var(--primary-color)}.theme-icon{margin-bottom:8px}.light-icon{color:#f59e0b}.dark-icon{color:#818cf8}.theme-name{color:var(--text-primary);font-size:.95rem;font-weight:700}.theme-sub{color:var(--text-muted);font-size:.78rem}.check-icon{color:var(--primary-color);position:absolute;top:14px;right:14px}.font-size-options{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.font-size-btn{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:center;padding:10px 8px;transition:all .2s}.font-size-btn.active{background:var(--primary-light);border-color:var(--primary-color)}.font-size-name{color:var(--text-primary);font-size:.85rem;font-weight:700;display:block}.font-size-val{color:var(--text-muted);font-size:.75rem}.settings-preview-box{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:14px}.preview-label{color:var(--text-muted);margin-bottom:4px;font-size:.75rem;font-weight:700;display:block}.preview-sample{font-size:var(--font-size-base);color:var(--text-primary);line-height:1.5}.bottom-nav-bar{background:var(--bg-card);border-top:1px solid var(--border-color);z-index:90;justify-content:space-around;align-items:center;height:56px;display:flex;position:sticky;bottom:0}.bottom-nav-item{color:var(--text-muted);flex-direction:column;align-items:center;gap:3px;font-size:.72rem;font-weight:600;transition:color .15s;display:flex}.bottom-nav-item.active,.accent-icon{color:var(--primary-color)}.toast-notification{color:#fff;border-radius:var(--radius-full);box-shadow:var(--shadow-xl);z-index:2000;background:#0f172a;padding:10px 20px;font-size:.88rem;font-weight:600;animation:.25s ease-out toastFade;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}@keyframes toastFade{0%{opacity:0;transform:translate(-50%,15px)}to{opacity:1;transform:translate(-50%)}}@media (width<=768px){.hide-on-mobile-strict{display:none!important}}.browser-notif-bar{color:#166534;background:#f0fdf4;border-bottom:1px solid #bbf7d0;justify-content:space-between;align-items:center;gap:8px;padding:8px 12px;font-size:.78rem;display:flex}.browser-notif-active-bar{color:#475569;background:#f8fafc;border-bottom:1px solid #e2e8f0;align-items:center;gap:6px;padding:6px 12px;font-size:.74rem;display:flex}.dot-active{color:#16a34a;font-size:.7rem}.btn-enable-browser-notif{color:#fff;border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;background:#16a34a;border:none;padding:3px 8px;font-size:.75rem;font-weight:600;transition:background .15s}.btn-enable-browser-notif:hover{background:#15803d}.ans-role-tag.prof-tag{color:#3730a3;background:#e0e7ff;border-radius:9999px;padding:2px 8px;font-size:.75rem;font-weight:700}@media (width<=768px){.header-container{gap:8px;padding:10px 14px}.header-brand{gap:8px;min-width:0}.brand-logo-icon{border-radius:var(--radius-sm);flex-shrink:0;width:36px;height:36px}.brand-text{min-width:0}.brand-univ-tag{letter-spacing:.5px;margin-bottom:1px;font-size:.58rem}.brand-title{white-space:nowrap;font-size:1.05rem;line-height:1.15}.brand-subtitle{display:none!important}.header-actions{flex-shrink:0;gap:6px}.header-icon-btn{width:34px;height:34px}.header-user-chip{gap:4px;padding:4px 6px}.chip-avatar{font-size:1.1rem}.chip-details{display:none!important}.user-account-dropdown{width:min(320px,100vw - 20px)!important;max-width:calc(100vw - 20px)!important;right:-4px!important}.notif-dropdown{width:min(340px,100vw - 20px)!important;max-width:calc(100vw - 20px)!important;right:-46px!important}.main-content-area,.mobile-main-content{box-sizing:border-box!important;width:100%!important;max-width:100vw!important;padding:14px 14px 84px!important;overflow-x:hidden!important}.student-banner-card{flex-direction:column;align-items:stretch;gap:14px;margin-bottom:16px;padding:16px}.student-banner-left{gap:12px}.student-avatar-box{flex-shrink:0;width:44px;height:44px;font-size:1.5rem}.student-info-meta h3{font-size:1.05rem}.student-sub{font-size:.78rem;line-height:1.35}.new-q-btn{justify-content:center;width:100%;padding:10px 16px}.list-controls-bar{flex-direction:column;align-items:stretch;gap:10px;margin-bottom:16px}.search-input-wrap{width:100%;min-width:0}.filter-group-right{flex-direction:column;align-items:stretch;gap:8px;width:100%}.student-tabs{-webkit-overflow-scrolling:touch;white-space:nowrap;width:100%;display:flex;overflow-x:auto}.student-tab{text-align:center;white-space:nowrap;flex:1;padding:6px 8px;font-size:.78rem}.category-select-wrap{justify-content:space-between;width:100%}.cat-select{width:100%}.questions-grid{gap:12px;grid-template-columns:1fr!important}.question-card{padding:14px 16px}.card-top-row{flex-wrap:wrap;gap:6px;margin-bottom:10px}.card-tags-left{flex-wrap:wrap;gap:4px}.card-status-right{flex-wrap:wrap;justify-content:flex-start;gap:4px;width:100%;margin-top:2px}.card-title{word-break:break-word;overflow-wrap:break-word;margin-bottom:6px;font-size:.98rem}.card-snippet{word-break:break-word;overflow-wrap:break-word;margin-bottom:12px;font-size:.84rem}.card-bottom-row{flex-wrap:wrap;gap:6px;padding-top:10px}.card-author{flex-wrap:wrap;font-size:.75rem;line-height:1.35}.prof-welcome-card{flex-direction:column;align-items:stretch;gap:14px;margin-bottom:16px;padding:16px}.prof-welcome-left{gap:12px}.prof-avatar-box{flex-shrink:0;width:46px;height:46px;font-size:1.6rem}.prof-name{font-size:1.15rem}.prof-courses-list{font-size:.78rem}.prof-quick-controls{gap:8px;width:100%;display:flex}.prof-control-btn{text-align:center;flex:1;justify-content:center;padding:8px 6px;font-size:.76rem}.prof-stats-grid{gap:10px;margin-bottom:16px;grid-template-columns:repeat(2,1fr)!important}.stat-card{gap:10px;padding:12px 14px}.stat-icon{width:36px;height:36px}.stat-value{font-size:1.15rem}.stat-label{font-size:.72rem}.dashboard-filters-bar{flex-direction:column;align-items:stretch;gap:10px;margin-bottom:16px}.filter-tabs{-webkit-overflow-scrolling:touch;white-space:nowrap;flex-wrap:nowrap;width:100%;overflow-x:auto}.filter-tab{white-space:nowrap;padding:6px 10px;font-size:.78rem}.category-filter-select{justify-content:space-between;width:100%}.q-form-card{padding:16px}.course-select-grid{gap:8px;grid-template-columns:1fr!important}.course-chip{padding:8px 12px}.category-select-grid{gap:8px;grid-template-columns:1fr!important}.category-select-card{padding:12px}.content-label-row{flex-direction:column;align-items:stretch;gap:8px}.content-toolbar-actions{gap:6px;width:100%;display:flex}.btn-ai-assist,.btn-similar-search{flex:1;justify-content:center;padding:6px 8px;font-size:.76rem}.form-submit-row{flex-direction:column-reverse;gap:8px;width:100%}.form-submit-row .btn{justify-content:center;width:100%}.detail-main-card{padding:16px}.detail-title{word-break:break-word;overflow-wrap:break-word;font-size:1.15rem;line-height:1.35}.detail-meta-row{flex-direction:column;align-items:flex-start;gap:6px}.detail-badges{flex-wrap:wrap;gap:6px}.detail-content-body{word-break:break-word;overflow-wrap:break-word;margin-bottom:24px;font-size:.92rem}.detail-text{word-break:break-word;overflow-wrap:break-word}.detail-top-nav{flex-wrap:wrap;gap:8px}.answer-item-card{padding:14px}.answer-card-header{flex-direction:column;align-items:flex-start;gap:6px}.ans-author-meta{flex-wrap:wrap}.answer-card-content{word-break:break-word;overflow-wrap:break-word}.answer-form-box{padding:14px}.ans-submit-row{width:100%}.ans-submit-row .btn{justify-content:center;width:100%}.edit-category-chips{grid-template-columns:1fr!important}.edit-actions-row{flex-direction:column-reverse;gap:8px;width:100%}.edit-actions-row .btn{justify-content:center;width:100%}.modal-overlay{align-items:flex-end;padding:8px}.modal-content{border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;max-width:100vw;max-height:90vh}.modal-header{padding:14px 16px}.modal-title{font-size:1rem}.modal-body{padding:14px}.modal-footer{flex-direction:column-reverse;gap:8px;padding:12px 14px}.modal-footer .btn{justify-content:center;width:100%}.ai-compare-grid{gap:10px;grid-template-columns:1fr!important}.compare-arrow{display:none!important}.ai-quick-templates{flex-direction:column;align-items:flex-start;gap:6px}.template-chips{width:100%}.template-chip-btn{padding:3px 8px;font-size:.72rem}.compare-card-body{gap:8px;padding:10px 12px}.ai-title-input{padding:7px 10px;font-size:.85rem}.ai-textarea{padding:8px 10px;font-size:.85rem}.accordion-summary{flex-direction:column;align-items:stretch;gap:8px}.summary-left{flex-wrap:wrap;gap:6px}.summary-right{justify-content:space-between;width:100%}.sim-title{white-space:normal;font-size:.88rem}.bottom-nav-bar{padding-bottom:env(safe-area-inset-bottom,0px);box-shadow:0 -2px 10px #00000014;z-index:999!important;width:100%!important;height:58px!important;position:fixed!important;bottom:0!important;left:0!important;right:0!important}.bottom-nav-item{cursor:pointer;background:0 0;border:none;flex:1;justify-content:center;height:100%;padding:4px 0}}.is-mobile .questions-grid{grid-template-columns:1fr}.is-mobile .main-content-area{padding-bottom:84px}.attachment-section{background:var(--bg-card,#fff);border:1px solid var(--border-color,#e2e8f0);border-radius:var(--radius-lg,12px);margin-top:14px;padding:16px}.attachment-header-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px;display:flex}.attachment-label-wrap{flex-direction:column;gap:2px;display:flex}.attachment-label-wrap .form-label{color:var(--text-primary,#1e293b);align-items:center;gap:6px;margin-bottom:0;font-size:.95rem;font-weight:700;display:flex}.attachment-count-tag{color:var(--primary-color,#4f46e5);font-size:.8rem;font-weight:600}.attachment-hint-text{color:var(--text-secondary,#64748b);font-size:.78rem}.security-badges-wrap{align-items:center;gap:6px;display:flex}.badge-security-verified{color:#059669;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:999px;align-items:center;gap:4px;padding:3px 8px;font-size:.72rem;font-weight:600;display:inline-flex}.badge-compression-applied{border-radius:var(--radius-sm);background:var(--bg-card-subtle);color:var(--text-secondary);border:1px solid var(--border-color);align-items:center;gap:4px;padding:3px 8px;font-size:.72rem;font-weight:600;display:inline-flex}.file-dropzone{border:2px dashed var(--border-color,#cbd5e1);border-radius:var(--radius-md,8px);text-align:center;cursor:pointer;background:var(--bg-hover,#f8fafc);padding:24px 16px;transition:all .2s;position:relative}.file-dropzone:hover{border-color:var(--primary-color,#6366f1);background:#f1f5f9}.file-dropzone.drag-over{border-color:var(--primary-color,#4f46e5);background:#eef2ff;transform:scale(1.005)}.file-dropzone.dropzone-disabled{opacity:.6;cursor:not-allowed;pointer-events:none}.hidden-file-input{display:none}.dropzone-content{flex-direction:column;align-items:center;gap:8px;display:flex}.upload-cloud-icon{color:var(--primary-color,#6366f1);stroke-width:1.8px}.dropzone-text-group{flex-direction:column;gap:3px;display:flex}.dropzone-primary-text{color:var(--text-primary,#334155);font-size:.9rem;font-weight:600}.dropzone-secondary-text{color:var(--text-secondary,#64748b);font-size:.76rem;line-height:1.4}.dropzone-processing{flex-direction:column;align-items:center;gap:6px;padding:10px 0;display:flex}.spin-icon{animation:1s linear infinite spin}.processing-text{color:var(--primary-color,#4f46e5);font-size:.88rem;font-weight:600}.processing-subtext{color:var(--text-secondary,#64748b);font-size:.75rem}.attached-files-list{flex-direction:column;gap:8px;margin-top:12px;display:flex}.attached-file-card{border-radius:var(--radius-md,8px);background:var(--bg-hover,#f8fafc);border:1px solid var(--border-color,#e2e8f0);align-items:center;gap:12px;padding:10px 14px;transition:all .15s;display:flex}.attached-file-card:hover{background:#fff;border-color:#cbd5e1;box-shadow:0 1px 4px #0000000a}.attached-file-thumb{background:#000;border:1px solid #e2e8f0;border-radius:6px;flex-shrink:0;width:44px;height:44px;overflow:hidden}.attached-file-thumb img{object-fit:cover;width:100%;height:100%}.attached-file-icon-box{color:#4f46e5;background:#eef2ff;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.attached-file-info{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.file-name-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.file-name{color:var(--text-primary,#1e293b);text-overflow:ellipsis;white-space:nowrap;max-width:320px;font-size:.88rem;font-weight:600;overflow:hidden}.badge-safe-verified{color:#15803d;background:#dcfce7;border-radius:4px;align-items:center;gap:3px;padding:1px 6px;font-size:.68rem;font-weight:600;display:inline-flex}.file-meta-row{align-items:center;gap:6px;font-size:.75rem;display:flex}.compression-info-wrap{align-items:center;gap:6px;display:flex}.file-size-badge{color:var(--text-secondary,#64748b);font-size:.72rem;font-weight:500}.file-size-badge.compressed{color:var(--text-primary);font-weight:600}.compression-ratio-pill{background:var(--bg-card-subtle);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:4px;padding:1px 6px;font-size:.68rem;font-weight:700}.btn-remove-attachment{color:#94a3b8;cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;padding:6px;transition:all .15s;display:flex}.btn-remove-attachment:hover{color:#ef4444;background:#fee2e2}.form-success-banner{border-radius:var(--radius-md,8px);background:var(--bg-card-subtle);color:var(--text-primary);border:1px solid var(--border-color);align-items:center;gap:8px;margin-bottom:12px;padding:10px 14px;font-size:.85rem;display:flex}.attachment-badge-pill{color:#475569;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:999px;align-items:center;gap:3px;padding:2px 7px;font-size:.7rem;font-weight:600;display:inline-flex}.detail-attachments-box{border-radius:var(--radius-lg,12px);background:var(--bg-hover,#f8fafc);border:1px solid var(--border-color,#e2e8f0);margin:18px 0;padding:16px}.attachments-title-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px;margin-bottom:12px;display:flex}.attachments-title{color:var(--text-primary,#1e293b);align-items:center;gap:6px;font-size:.92rem;font-weight:700;display:flex}.security-tag{color:var(--text-secondary);background:var(--bg-card-subtle);border-radius:var(--radius-sm);border:1px solid var(--border-color);padding:2px 8px;font-size:.72rem;font-weight:600}.detail-attachments-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px;display:grid}.detail-attachment-card{border:1px solid var(--border-color,#e2e8f0);border-radius:var(--radius-md,8px);background:#fff;align-items:center;gap:10px;padding:10px;transition:all .15s;display:flex}.detail-attachment-card:hover{border-color:#cbd5e1;box-shadow:0 2px 6px #0000000d}.detail-att-thumb-wrap{cursor:pointer;border:1px solid #e2e8f0;border-radius:6px;flex-shrink:0;width:48px;height:48px;position:relative;overflow:hidden}.detail-att-thumb{object-fit:cover;width:100%;height:100%}.thumb-zoom-overlay{color:#fff;opacity:0;background:#00000059;justify-content:center;align-items:center;transition:opacity .15s;display:flex;position:absolute;inset:0}.detail-att-thumb-wrap:hover .thumb-zoom-overlay{opacity:1}.detail-att-icon-box{background:var(--bg-card-subtle);width:48px;height:48px;color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.detail-att-meta{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.att-file-name{color:var(--text-primary,#1e293b);text-overflow:ellipsis;white-space:nowrap;font-size:.85rem;font-weight:600;overflow:hidden}.att-size-info{color:var(--text-secondary,#64748b);font-size:.72rem}.att-compressed-info{color:var(--text-primary);font-weight:600}.btn-download-att{background:var(--bg-hover,#f1f5f9);color:var(--text-primary,#334155);border:1px solid #e2e8f0;border-radius:6px;flex-shrink:0;align-items:center;gap:4px;padding:5px 10px;font-size:.75rem;font-weight:600;text-decoration:none;transition:all .15s;display:inline-flex}.btn-download-att:hover{background:var(--primary-color,#4f46e5);color:#fff;border-color:var(--primary-color,#4f46e5)}.image-viewer-modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:9999;background:#0f172abf;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.image-viewer-modal-box{background:#fff;border-radius:12px;flex-direction:column;max-width:90vw;max-height:90vh;display:flex;overflow:hidden;box-shadow:0 20px 40px #0000004d}.image-viewer-header{background:#f8fafc;border-bottom:1px solid #e2e8f0;justify-content:space-between;align-items:center;padding:12px 18px;display:flex}.image-viewer-title{color:#1e293b;font-size:.9rem;font-weight:700}.btn-close-viewer{color:#64748b;cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;padding:4px;display:flex}.btn-close-viewer:hover{color:#0f172a;background:#e2e8f0}.image-viewer-body{background:#0f172a;justify-content:center;align-items:center;padding:16px;display:flex;overflow:auto}.image-viewer-body img{object-fit:contain;border-radius:4px;max-width:85vw;max-height:75vh}.content-label-group{flex-wrap:wrap;align-items:baseline;gap:8px;display:flex}.title-omitted-hint{color:var(--text-secondary,#64748b);font-size:.78rem;font-weight:400}