*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--secondary-color: #64748b;--success-color: #10b981;--danger-color: #ef4444;--warning-color: #f59e0b;--bg-color: #f8fafc;--card-bg: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px 0 rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-primary);line-height:1.6}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1200px;margin:0 auto;padding:2rem}.header{background:var(--card-bg);box-shadow:var(--shadow);padding:1rem 0;margin-bottom:2rem}.header-content{max-width:1200px;margin:0 auto;padding:0 2rem;display:flex;justify-content:space-between;align-items:center;gap:2rem}.header-left{flex:1}.logo{display:flex;align-items:center;gap:.5rem;font-size:1.5rem;font-weight:700;color:var(--text-primary)}.logo:hover{text-decoration:none;color:var(--primary-color)}.header-right{display:flex;align-items:center;gap:.5rem}.auth-buttons{display:flex;gap:.5rem}.user-menu{display:flex;align-items:center;gap:1rem}.user-name{color:var(--primary-color);font-weight:500}.page-header{margin-bottom:2rem}.page-header h1{font-size:2.5rem;color:var(--text-primary);margin-bottom:.5rem}.page-header-content{flex:1}.subtitle{color:var(--text-secondary);font-size:1.1rem}.search-bar{display:flex;gap:1rem;margin-bottom:2rem}.search-input,.category-filter{flex:1;padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:.5rem;font-size:1rem;transition:border-color .2s;background:var(--card-bg)}.search-input:focus,.category-filter:focus{outline:none;border-color:var(--primary-color)}.btn{padding:.75rem 1.5rem;border:none;border-radius:.5rem;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;text-decoration:none}.btn:hover{text-decoration:none}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-secondary:hover{background-color:#475569}.btn-danger{background-color:var(--danger-color);color:#fff}.btn-danger:hover{background-color:#dc2626}.btn-warning{background-color:var(--warning-color);color:#fff}.btn-warning:hover{background-color:#d97706}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn-block{width:100%}.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:1.5rem}.topic-card{background:var(--card-bg);border-radius:.75rem;padding:1.5rem;box-shadow:var(--shadow);transition:all .2s;cursor:pointer;border:2px solid transparent;display:flex;flex-direction:column;min-height:200px;text-decoration:none;color:inherit}.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary-color);text-decoration:none}.topic-card-header{margin-bottom:1rem}.topic-categories{display:flex;flex-wrap:wrap;gap:.25rem;margin-bottom:.5rem}.topic-category{display:inline-block;padding:.25rem .75rem;background-color:var(--primary-color);color:#fff;border-radius:1rem;font-size:.75rem;font-weight:500}.topic-title{font-size:1.25rem;color:var(--text-primary);margin-bottom:.5rem}.topic-description{color:var(--text-secondary);font-size:.9rem;margin-bottom:1rem;line-height:1.5;flex:1}.topic-tags{display:flex;flex-wrap:wrap;gap:.25rem;margin-bottom:1rem}.topic-tag{display:inline-block;padding:.25rem .5rem;background-color:var(--bg-color);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:.375rem;font-size:.75rem}.topic-meta{display:flex;justify-content:space-between;align-items:flex-end;font-size:.875rem;color:var(--text-secondary);margin-top:auto;padding-top:1rem;border-top:1px solid var(--border-color)}.topic-stats{display:flex;gap:1rem;align-items:center}.topic-actions{display:flex;gap:.5rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-primary)}.input,.form-group input,.form-group select,.form-group textarea{width:100%;padding:.75rem;border:2px solid var(--border-color);border-radius:.5rem;font-size:1rem;font-family:inherit;transition:border-color .2s;background:var(--card-bg)}.input:focus,.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary-color)}.textarea,.form-group textarea{resize:vertical;min-height:100px}.hint{display:block;margin-top:.25rem;font-size:.8rem;color:var(--text-secondary)}.form-actions{display:flex;gap:1rem;justify-content:flex-end;margin-top:2rem}.checkbox-label{display:flex;align-items:center;gap:.5rem;cursor:pointer}.categories-list{display:flex;flex-wrap:wrap;gap:.75rem}.error-message{background:#ef44441a;border:1px solid var(--danger-color);color:var(--danger-color);padding:.75rem 1rem;border-radius:.5rem;margin-bottom:1rem}.modal-backdrop{position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background-color:#00000080;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;animation:fadeIn .2s}.modal{background-color:var(--card-bg);padding:2rem;border-radius:1rem;width:90%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideUp .3s}.modal-sm{max-width:400px}.modal-md{max-width:600px}.modal-lg{max-width:900px}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.modal-title{font-size:1.5rem;font-weight:600}.modal-close{background:none;border:none;font-size:2rem;color:var(--text-secondary);cursor:pointer;line-height:1}.modal-close:hover{color:var(--text-primary)}.modal-content{padding:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.auth-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 200px)}.auth-card{background:var(--card-bg);border-radius:1rem;padding:2rem;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.auth-card h1{text-align:center;margin-bottom:2rem;font-size:1.5rem}.auth-link{text-align:center;margin-top:1.5rem;color:var(--text-secondary)}.quick-register-section{margin-bottom:1.5rem}.quick-hint{text-align:center;color:var(--text-secondary);font-size:.85rem;margin-top:.5rem}.divider{display:flex;align-items:center;margin:1.5rem 0;color:var(--text-secondary)}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border-color)}.divider span{padding:0 1rem;font-size:.9rem}.generated-credentials-box{padding:1.5rem;background:var(--bg-color);border-radius:.5rem}.credentials-title{font-weight:600;font-size:1.1rem;margin-bottom:1rem;text-align:center}.credential-row{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem;padding:.75rem;background:var(--card-bg);border-radius:.5rem;border:1px solid var(--border-color)}.credential-label{font-weight:500;min-width:60px}.credential-value{flex:1;font-family:monospace;font-size:1rem;background:transparent;user-select:all;word-break:break-all}.copy-btn{padding:.375rem .75rem;background:var(--primary-color);color:#fff;border:none;border-radius:.375rem;font-size:.8rem;cursor:pointer;transition:background .2s;white-space:nowrap}.copy-btn:hover{background:var(--primary-hover)}.copy-all{display:block;width:100%;margin:1rem 0;padding:.5rem}.credentials-warning{text-align:center;color:var(--danger-color);font-size:.85rem;margin-bottom:1rem;padding:.75rem;background:#ef44441a;border-radius:.5rem}.topic-page{max-width:900px;margin:0 auto}.topic-header{margin-bottom:2rem;padding-bottom:1rem;border-bottom:2px solid var(--border-color)}.back-link{display:inline-flex;align-items:center;gap:.5rem;margin-bottom:1rem;color:var(--text-secondary)}.back-link:hover{color:var(--primary-color);text-decoration:none}.topic-page .topic-title{font-size:2rem;margin-bottom:1rem}.topic-page .topic-description{font-size:1.1rem;margin-bottom:1rem}.topic-page .topic-stats{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--border-color)}.points-section h2{margin-bottom:1.5rem;font-size:1.5rem}.points-list{display:flex;flex-direction:column;gap:.75rem}.empty-points{text-align:center;padding:2rem;color:var(--text-secondary);font-style:italic}.point-item{background:var(--bg-color);border-radius:.5rem;padding:1rem;border-left:4px solid var(--primary-color)}.point-header{display:flex;justify-content:space-between;align-items:start;gap:1rem}.point-text{font-size:1.1rem;font-weight:500;color:var(--text-primary);flex:1}.point-explanation{color:var(--text-secondary);margin-top:.75rem;padding:.75rem .75rem .75rem 1rem;border-left:3px solid var(--border-color);background:var(--card-bg);border-radius:.375rem;font-size:.95rem}.subpoints-list{margin-top:1rem;padding-left:1.5rem;display:flex;flex-direction:column;gap:.5rem}.subpoint-item{background:var(--card-bg);border-radius:.375rem;padding:.75rem 1rem;border-left:3px solid var(--success-color);color:var(--text-secondary);font-size:.9rem;display:flex;align-items:center;justify-content:space-between;gap:.5rem}.subpoint-item.linked{border-left-color:var(--primary-color)}.subpoint-link{color:var(--primary-color);font-weight:500;font-size:.85rem;padding:.25rem .5rem;background:#6366f11a;border-radius:.25rem}.subpoint-link:hover{background:#6366f133;text-decoration:none}.subpoint-form{margin-top:1rem;padding:1rem;background:var(--card-bg);border-radius:.5rem;border:1px solid var(--border-color)}.add-point-section{margin-top:2rem;padding:1.5rem;background:var(--bg-color);border-radius:.5rem;border:2px dashed var(--border-color)}.add-point-section h3{margin-bottom:1rem;font-size:1.25rem}.loading{text-align:center;padding:3rem;color:var(--text-secondary)}.empty-state{text-align:center;padding:4rem 2rem;color:var(--text-secondary)}.empty-state p{font-size:1.25rem;margin-bottom:1.5rem}.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:2000;display:flex;flex-direction:column;gap:.75rem}.toast{display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;background:var(--card-bg);border-radius:.5rem;box-shadow:var(--shadow-lg);cursor:pointer;animation:slideInRight .3s ease;min-width:250px}@keyframes slideInRight{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.toast-success{border-left:4px solid var(--success-color)}.toast-error{border-left:4px solid var(--danger-color)}.toast-warning{border-left:4px solid var(--warning-color)}.toast-info{border-left:4px solid var(--primary-color)}.toast-message{flex:1;font-size:.875rem}.toast-close{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:1.25rem;line-height:1}.admin-page{max-width:1200px;margin:0 auto}.admin-page h1{margin-bottom:1.5rem}.admin-tabs{display:flex;gap:0;margin-bottom:1.5rem;border-bottom:2px solid var(--border-color)}.admin-tab{padding:.75rem 1.5rem;border:none;background:none;color:var(--text-secondary);font-size:1rem;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s}.admin-tab:hover{color:var(--primary-color)}.admin-tab.active{color:var(--primary-color);border-bottom-color:var(--primary-color)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:var(--card-bg);border-radius:.75rem;padding:1.25rem;text-align:center;box-shadow:var(--shadow)}.stat-value{font-size:2rem;font-weight:700;color:var(--primary-color)}.stat-label{font-size:.85rem;color:var(--text-secondary);margin-top:.25rem}.recent-sections{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.recent-section{background:var(--card-bg);border-radius:.75rem;padding:1.25rem;box-shadow:var(--shadow)}.recent-section h3{font-size:1rem;margin-bottom:1rem;color:var(--text-primary)}.recent-list{list-style:none}.recent-list li{display:flex;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid var(--border-color);font-size:.9rem}.recent-list li:last-child{border-bottom:none}.recent-name{color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;margin-right:.5rem}.recent-date,.recent-meta{color:var(--text-secondary);font-size:.8rem}.admin-table{width:100%;border-collapse:collapse;background:var(--card-bg);border-radius:.75rem;overflow:hidden;box-shadow:var(--shadow)}.admin-table th,.admin-table td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--border-color)}.admin-table th{background:var(--bg-color);font-weight:600;font-size:.85rem;color:var(--text-secondary)}.admin-table td{font-size:.9rem}.admin-table tr:last-child td{border-bottom:none}.admin-table .actions{display:flex;gap:.5rem;flex-wrap:wrap}.badge-admin,.badge-user{padding:.25rem .5rem;border-radius:.25rem;font-size:.75rem;font-weight:500}.badge-admin{background:#10b9811a;color:var(--success-color)}.badge-user{background:var(--bg-color);color:var(--text-secondary)}.add-category-form{display:flex;gap:.75rem;margin-bottom:1.5rem}.add-category-form .input{flex:1}.input-sm{padding:.375rem .5rem;font-size:.9rem}.suggest-section{margin-top:2rem;padding:1.5rem;background:var(--bg-color);border-radius:.5rem;border:2px dashed var(--border-color)}.suggest-section h3{margin-bottom:1rem;font-size:1.25rem}.radio-group{display:flex;gap:1.5rem}.radio-label{display:flex;align-items:center;gap:.5rem;cursor:pointer}.management-section{margin-top:1.5rem}.management-section .btn{position:relative}.badge{display:inline-flex;align-items:center;justify-content:center;min-width:1.25rem;height:1.25rem;padding:0 .375rem;margin-left:.5rem;font-size:.75rem;font-weight:600;background-color:var(--danger-color);color:#fff;border-radius:9999px}.invitations-panel,.suggestions-panel{margin-top:1rem;padding:1.5rem;background:var(--card-bg);border-radius:.5rem;box-shadow:var(--shadow)}.invitations-panel h3,.suggestions-panel h3{margin-bottom:1rem;font-size:1.1rem}.invite-form{margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.form-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.form-row .input{flex:1;min-width:150px}.invitations-list,.suggestions-list{list-style:none;display:flex;flex-direction:column;gap:.75rem}.invitation-item,.suggestion-item{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1rem;background:var(--bg-color);border-radius:.5rem;flex-wrap:wrap}.invitation-item .username{font-weight:500;min-width:100px}.suggestion-content{flex:1}.suggestion-content .type{font-weight:500;color:var(--primary-color)}.suggestion-content .author{display:block;font-size:.85rem;color:var(--text-secondary);margin-top:.25rem}.suggestion-actions{display:flex;gap:.5rem}.btn-success{background-color:var(--success-color);color:#fff}.btn-success:hover{background-color:#059669}.empty{color:var(--text-secondary);font-style:italic;text-align:center;padding:1rem}.notification-bell{position:relative}.bell-button{background:none;border:none;padding:.5rem;cursor:pointer;color:var(--text-secondary);display:flex;align-items:center;justify-content:center;position:relative;border-radius:.5rem;transition:background-color .2s,color .2s}.bell-button:hover{background-color:var(--bg-color);color:var(--primary-color)}.bell-badge{position:absolute;top:0;right:0;background-color:var(--danger-color);color:#fff;font-size:.65rem;font-weight:600;min-width:1rem;height:1rem;border-radius:9999px;display:flex;align-items:center;justify-content:center;padding:0 .25rem}.notifications-dropdown{position:absolute;top:100%;right:0;width:320px;max-height:400px;background:var(--card-bg);border-radius:.5rem;box-shadow:var(--shadow-lg);overflow:hidden;z-index:1000;margin-top:.5rem}.notifications-header{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;border-bottom:1px solid var(--border-color);font-weight:600}.mark-all-read{background:none;border:none;color:var(--primary-color);font-size:.8rem;cursor:pointer}.mark-all-read:hover{text-decoration:underline}.notifications-list{max-height:340px;overflow-y:auto}.no-notifications{padding:2rem;text-align:center;color:var(--text-secondary)}.notification-item{display:flex;gap:.5rem;padding:.75rem 1rem;border-bottom:1px solid var(--border-color);cursor:pointer;transition:background-color .2s}.notification-item:hover{background-color:var(--bg-color)}.notification-item.unread{background-color:#6366f10d}.notification-item.unread .notification-title{font-weight:600}.notification-content{flex:1;min-width:0}.notification-title{font-size:.9rem;color:var(--text-primary);margin-bottom:.25rem}.notification-message{font-size:.8rem;color:var(--text-secondary);margin-bottom:.25rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.notification-time{font-size:.75rem;color:var(--text-secondary)}.notification-delete{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:1rem;padding:.25rem;opacity:.5;transition:opacity .2s}.notification-delete:hover{opacity:1;color:var(--danger-color)}@media(max-width:768px){.container{padding:1rem}.header-content{flex-direction:column;gap:1rem}.page-header{flex-direction:column;text-align:center}.search-bar{flex-direction:column}.topics-grid{grid-template-columns:1fr}.topic-meta{flex-direction:column;gap:1rem}.modal{width:95%;padding:1.5rem}.form-row{flex-direction:column;align-items:stretch}.invitation-item,.suggestion-item{flex-direction:column;align-items:flex-start}}