.navbar{background-color:var(--navbar-bg);border-bottom:1px solid var(--border-color);box-shadow:0 2px 4px var(--shadow-color);position:sticky;top:0;z-index:100}.navbar-container{align-items:center;display:flex;height:60px;justify-content:space-between;margin:0 auto;max-width:1200px;padding:0 20px}.navbar-brand{align-items:center;color:var(--primary-color);display:flex;font-size:24px;font-weight:700;gap:8px;text-decoration:none}.brand-icon{font-size:28px}.navbar-toggle{background:none;border:none;color:var(--text-color);cursor:pointer;display:none;font-size:24px}.navbar-menu,.navbar-nav{align-items:center;display:flex}.navbar-nav{gap:6px;list-style:none}.nav-link{background:none;border:none;border-radius:8px;color:var(--text-color);cursor:pointer;font-size:14px;font-weight:500;padding:8px 16px;position:relative;text-decoration:none;transition:all .2s ease}.nav-link:hover{background-color:#007bff14;color:var(--primary-color)}.nav-link.nav-active{background-color:#007bff1f;color:var(--primary-color);font-weight:600}.nav-link.nav-active:after{background-color:var(--primary-color);border-radius:2px;bottom:-2px;content:"";height:3px;left:50%;position:absolute;transform:translateX(-50%);width:20px}.nav-link.nav-btn-register{background-color:var(--primary-color);border-radius:8px;color:#fff}.nav-link.nav-btn-register:hover{background-color:#0056b3;color:#fff}.nav-profile-wrapper{margin-left:8px;position:relative}.nav-profile-trigger{align-items:center;background:none;border:1px solid var(--border-color);border-radius:24px;cursor:pointer;display:flex;gap:8px;padding:4px 12px 4px 4px;transition:all .2s ease}.nav-profile-trigger:hover{background-color:#007bff0d;border-color:var(--primary-color)}.nav-avatar{align-items:center;background:linear-gradient(135deg,var(--primary-color),#6f42c1);border-radius:50%;color:#fff;display:flex;font-size:14px;font-weight:600;height:32px;justify-content:center;width:32px}.nav-username{color:var(--text-color);font-size:14px;font-weight:500}.nav-caret{color:var(--text-light);font-size:10px}.nav-profile-dropdown{animation:dropdownFadeIn .15s ease;background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;box-shadow:0 8px 24px var(--shadow-color);min-width:180px;padding:6px;position:absolute;right:0;top:calc(100% + 8px);z-index:200}@keyframes dropdownFadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.dropdown-item{background:none;border:none;border-radius:8px;color:var(--text-color);cursor:pointer;display:block;font-size:14px;padding:10px 14px;text-align:left;text-decoration:none;transition:background-color .15s;width:100%}.dropdown-item:hover{background-color:var(--light-color)}.dropdown-logout:hover{background-color:#dc354514;color:var(--danger-color)}.dropdown-divider{background-color:var(--border-color);height:1px;margin:4px 8px}.fab-create-post{align-items:center;background:linear-gradient(135deg,var(--primary-color),#0056b3);border-radius:50%;bottom:32px;box-shadow:0 4px 16px #007bff66;color:#fff;display:flex;height:56px;justify-content:center;position:fixed;right:32px;text-decoration:none;transition:all .3s ease;width:56px;z-index:90}.fab-create-post:hover{box-shadow:0 6px 24px #007bff80;transform:scale(1.1)}.fab-icon{font-size:24px}@media (max-width:768px){.navbar-toggle{display:block}.navbar-menu{background-color:var(--navbar-bg);border-bottom:1px solid var(--border-color);display:none;left:0;position:absolute;right:0;top:60px;width:100%}.navbar-menu.active{display:flex}.navbar-nav{align-items:stretch;flex-direction:column;gap:4px;padding:12px;width:100%}.nav-link.nav-active:after{display:none}.nav-profile-wrapper{border-top:1px solid var(--border-color);margin-left:0;margin-top:8px;padding-top:8px}.fab-create-post{bottom:20px;right:20px}}.sidebar-overlay{background:#0006;bottom:0;left:0;opacity:0;position:fixed;right:0;top:0;transition:all .3s ease;visibility:hidden;z-index:998}.sidebar-overlay.visible{opacity:1;visibility:visible}.sidebar{background:var(--card-bg);border-right:1px solid var(--border-color);box-shadow:2px 0 12px #00000026;height:100vh;left:-280px;overflow-y:auto;position:fixed;top:0;transition:left .3s ease;width:280px;z-index:999}.sidebar.open{left:0}.sidebar-header{align-items:center;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;padding:16px 20px}.sidebar-header h3{color:var(--text-color);font-size:18px;margin:0}.sidebar-close{background:none;border:none;border-radius:4px;color:var(--text-light);cursor:pointer;font-size:18px;padding:4px 8px;transition:background .2s}.sidebar-close:hover{background:var(--input-bg)}.sidebar-section{border-bottom:1px solid var(--border-color);padding:12px 0}.sidebar-section-title{color:var(--text-light);font-size:11px;font-weight:700;letter-spacing:1px;margin:0;padding:0 20px 8px;text-transform:uppercase}.sidebar-channel{align-items:center;background:none;border:none;border-left:3px solid #0000;color:var(--text-color);cursor:pointer;display:flex;font-size:14px;gap:10px;padding:10px 20px;text-align:left;transition:background .2s;width:100%}.sidebar-channel.active,.sidebar-channel:hover{background:var(--input-bg)}.sidebar-channel.active{border-left-color:var(--primary-color);color:var(--primary-color);font-weight:600}.channel-icon{font-size:18px;text-align:center;width:24px}.sidebar-menu-item{align-items:center;background:none;border:none;color:var(--text-color);cursor:pointer;display:flex;font-size:14px;gap:10px;padding:10px 20px;text-align:left;transition:background .2s;width:100%}.sidebar-menu-item:hover{background:var(--input-bg)}.sidebar-menu-item.depth-1{font-size:13px;padding-left:40px}.sidebar-menu-item.depth-2{font-size:12px;padding-left:56px}.menu-icon{font-size:16px;text-align:center;width:22px}.menu-title{flex:1 1}.menu-arrow{color:var(--text-light);font-size:12px;transition:transform .2s}.menu-arrow.expanded{transform:rotate(90deg)}.menu-badge{background:var(--input-bg);border-radius:8px;color:var(--text-light);font-size:10px;font-weight:600;padding:1px 6px}.submenu{background:var(--bg-color)}.iframe-modal-overlay{align-items:center;background:#0009;bottom:0;display:flex;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:1100}.iframe-modal{background:var(--card-bg);border-radius:12px;box-shadow:0 8px 32px #0000004d;display:flex;flex-direction:column;height:85vh;overflow:hidden;width:90vw}.iframe-header{align-items:center;background:var(--input-bg);border-bottom:1px solid var(--border-color);color:var(--text-light);display:flex;font-size:13px;justify-content:space-between;padding:10px 16px}.iframe-header button{background:none;border:none;border-radius:4px;color:var(--text-light);cursor:pointer;font-size:18px;padding:2px 8px}.iframe-header button:hover{background:var(--border-color)}.iframe-content{border:none;flex:1 1;width:100%}.sidebar-toggle{align-items:center;background:none;border:none;border-radius:6px;color:var(--text-color);cursor:pointer;display:flex;font-size:22px;padding:6px 10px;transition:background .2s}.sidebar-toggle:hover{background:var(--input-bg)}@media (max-width:768px){.sidebar{left:-260px;width:260px}}.auth-container{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;justify-content:center;min-height:calc(100vh - 60px);padding:20px}.auth-card{background:var(--card-bg);border-radius:8px;box-shadow:0 10px 40px var(--shadow-color);max-width:400px;padding:40px;width:100%}.auth-card h1{color:var(--text-color);font-size:28px;margin-bottom:10px;text-align:center}.auth-subtitle{color:var(--text-light);font-size:14px;margin-bottom:30px;text-align:center}.auth-card form{margin-bottom:20px}.auth-footer{color:var(--text-light);font-size:14px;text-align:center}.auth-footer a{color:var(--primary-color);font-weight:600;text-decoration:none}.auth-footer a:hover{text-decoration:underline}@media (max-width:480px){.auth-card{padding:30px 20px}.auth-card h1{font-size:24px}}.home-page{background-color:var(--light-color);min-height:calc(100vh - 60px);padding:40px 0}.page-header{margin-bottom:40px;text-align:center}.page-header h1{color:var(--text-color);font-size:36px;margin-bottom:10px}.page-header p{color:var(--text-light);font-size:16px}.filters-section{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:30px}.search-bar{display:flex;flex:1 1;gap:8px;min-width:200px}.search-input{flex:1 1;min-width:150px}.search-btn{font-size:14px;padding:8px 16px;white-space:nowrap}.search-clear-btn{font-size:14px;padding:8px 12px}.filter-select{min-width:150px}.posts-list{display:flex;flex-direction:column;gap:20px}.post-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;cursor:pointer;padding:20px;transition:all .3s ease}.post-card.post-pinned{background:linear-gradient(135deg,var(--card-bg) 0,#ffc1070d 100%);border-left:4px solid var(--warning-color)}.post-card:hover{border-color:var(--primary-color);box-shadow:0 4px 12px var(--shadow-color)}.post-badges{align-items:center;display:flex;flex-shrink:0;gap:6px}.badge-pinned{background-color:var(--warning-color);border-radius:12px;color:#333;font-size:11px;font-weight:600;padding:2px 8px}.btn-pin{background:none;border:1px solid var(--border-color);border-radius:4px;color:var(--text-light);cursor:pointer;font-size:12px;padding:2px 8px;transition:all .2s}.btn-pin:hover{border-color:var(--warning-color);color:var(--warning-color)}.post-header{align-items:flex-start;display:flex;gap:15px;justify-content:space-between;margin-bottom:15px}.post-title{color:var(--primary-color);flex:1 1;font-size:18px;font-weight:600;text-decoration:none}.post-title:hover{text-decoration:underline}.post-excerpt{color:var(--text-light);line-height:1.6;margin-bottom:15px}.post-meta{font-size:13px}.author,.time,.views{align-items:center;display:flex;gap:5px}.empty-state{background:var(--card-bg);border-radius:8px;color:var(--text-light);padding:60px 20px;text-align:center}.empty-state a{color:var(--primary-color);font-weight:600;text-decoration:none}.empty-state a:hover{text-decoration:underline}.pagination{flex-wrap:wrap;gap:10px;margin-top:40px}.page-ellipsis{color:var(--text-light);font-size:16px;line-height:40px;text-align:center;width:30px}.page-jump{align-items:center;display:flex;gap:4px;margin-left:8px}.page-jump-input{background:var(--card-bg);border:1px solid var(--border-color);border-radius:4px;color:var(--text-color);font-size:14px;height:36px;padding:4px 8px;text-align:center;width:60px}.page-jump-input:focus{border-color:var(--primary-color);outline:none}.btn-go{font-size:13px;height:36px;padding:4px 10px}.page-info{color:var(--text-light);font-size:13px;margin-left:8px;white-space:nowrap}@media (max-width:768px){.page-header h1{font-size:28px}.filters-section{flex-direction:column}.filter-select,.search-input{width:100%}.post-header{flex-direction:column}}.level-tag-compact{border-radius:12px;box-shadow:0 1px 3px #0003;display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;margin-left:6px;padding:2px 8px;vertical-align:middle;white-space:nowrap}.level-badge{background:var(--card-bg);border:1px solid var(--border-color);border-radius:10px;padding:12px}.level-info-row{align-items:center;display:flex;gap:10px;margin-bottom:8px}.level-tag{border-radius:14px;box-shadow:0 2px 6px #00000026;display:inline-block;font-size:12px;font-weight:700;letter-spacing:.5px;padding:3px 10px}.level-name{font-size:14px;font-weight:600}.exp-bar-container{width:100%}.exp-bar-bg{background:#e9ecef;background:var(--input-bg,#e9ecef);box-shadow:inset 0 1px 3px #0000001a;height:14px;overflow:hidden;width:100%}.exp-bar-bg,.exp-bar-fill{border-radius:7px;position:relative}.exp-bar-fill{height:100%;transition:width 1s ease-in-out}.exp-bar-fill:after{background:linear-gradient(180deg,#ffffff4d,#fff0 50%,#0000000d);border-radius:7px;bottom:0;content:"";left:0;position:absolute;right:0;top:0}.exp-text{align-items:center;display:flex;font-size:12px;justify-content:space-between;margin-top:4px}.exp-fraction{color:var(--text-light);font-weight:500}.exp-percent{color:var(--text-light);font-size:13px;font-weight:700}.block-renderer{display:flex;flex-direction:column;gap:16px}.render-block{border-radius:8px;overflow:hidden}.text-block p{color:var(--text-color);line-height:1.7;margin:0 0 8px}.text-block p:last-child{margin-bottom:0}.code-block-wrapper{border:1px solid var(--border-color);border-radius:8px;overflow:hidden}.code-block-header{align-items:center;background:#2d2d2d;border-bottom:1px solid #444;display:flex;justify-content:space-between;padding:6px 12px}.code-lang-label{color:#888;font-size:12px;font-weight:600;letter-spacing:.5px;text-transform:uppercase}.code-copy-btn{background:none;border:1px solid #555;border-radius:4px;color:#aaa;cursor:pointer;font-size:12px;padding:2px 8px;transition:all .2s}.code-copy-btn:hover{background:#444;color:#fff}.search-highlight{background-color:#ffeb3b;border-radius:2px;color:#000;padding:1px 2px}.image-carousel{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;overflow:hidden;position:relative}.carousel-container{overflow:hidden}.carousel-track{display:flex;transition:transform .3s ease}.carousel-slide{align-items:center;display:flex;flex-direction:column;min-width:100%;padding:16px}.carousel-image{border-radius:4px;max-height:500px;max-width:100%;object-fit:contain}.carousel-caption{color:var(--text-secondary);font-size:13px;margin:8px 0 0}.carousel-btn{align-items:center;background:#00000080;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;font-size:20px;height:36px;justify-content:center;position:absolute;top:50%;transform:translateY(-50%);transition:background .2s;width:36px}.carousel-btn:hover:not(:disabled){background:#000c}.carousel-btn:disabled{cursor:not-allowed;opacity:.3}.carousel-prev{left:8px}.carousel-next{right:8px}.carousel-dots{display:flex;gap:6px;justify-content:center;padding:8px}.carousel-dot{background:var(--border-color);border-radius:50%;cursor:pointer;height:8px;transition:background .2s;width:8px}.carousel-dot.active{background:var(--accent-color)}.attachments-list{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:12px 16px}.attachments-list h4{color:var(--text-secondary);font-size:14px;margin:0 0 8px}.attachment-item{align-items:center;border-bottom:1px solid var(--border-color);color:var(--text-color);display:flex;gap:8px;padding:6px 0;text-decoration:none;transition:background .2s}.attachment-item:last-child{border-bottom:none}.attachment-item:hover{color:var(--accent-color)}.attachment-icon{font-size:18px}.attachment-name{flex:1 1;font-size:14px}.attachment-size{color:var(--text-secondary);font-size:12px}.post-detail-page{background-color:var(--light-color);min-height:calc(100vh - 60px);padding:40px 0}.post-detail{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;margin-bottom:30px;padding:30px}.post-detail h1{color:var(--text-color);font-size:32px;margin-bottom:15px}.post-header{border-bottom:1px solid var(--border-color);margin-bottom:30px;padding-bottom:20px}.post-meta{color:var(--text-light);display:flex;flex-wrap:wrap;font-size:14px;gap:20px}.post-content{word-wrap:break-word;color:var(--text-color);font-size:16px;line-height:1.8;margin-bottom:30px;white-space:pre-wrap}.post-content p{margin-bottom:15px}.post-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}.tag{background-color:var(--light-color);border:1px solid var(--primary-color);border-radius:20px;color:var(--primary-color);display:inline-block;font-size:13px;padding:6px 12px}.post-actions{display:flex;gap:10px}.comments-section{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:30px}.comments-section h2{font-size:20px;margin-bottom:20px}.comment-form{border-bottom:1px solid var(--border-color);margin-bottom:30px;padding-bottom:30px}.comment-form textarea{margin-bottom:10px}.comments-list{display:flex;flex-direction:column;gap:0}.comment{background-color:initial;border:none;border-radius:0;padding:8px 12px;position:relative}.comment.accepted{background-color:#28a7450f;border-left:3px solid var(--success-color);border-radius:0}.accepted-badge{background-color:var(--success-color);border-radius:4px;color:#fff;display:inline-block;font-size:11px;font-weight:600;margin-left:8px;padding:2px 8px;vertical-align:middle}.comment-header{align-items:center;display:flex;font-size:12px;gap:8px;margin-bottom:4px}.comment-header .author{color:var(--primary-color);font-size:13px;font-weight:600}.comment-header .time{color:var(--text-light);font-size:11px}.comment-content{word-wrap:break-word;color:var(--text-color);font-size:14px;line-height:1.5;margin-bottom:4px;white-space:pre-wrap}.comment-content p{margin-bottom:2px}.comment-actions{display:flex;font-size:12px;gap:12px;padding:2px 0}.btn-accept,.btn-delete,.btn-reply,.btn-vote{background:none;border:none;border-radius:4px;color:var(--text-light);cursor:pointer;font-size:12px;font-weight:500;padding:2px 6px;transition:all .15s}.btn-accept:hover,.btn-reply:hover,.btn-vote:hover{background-color:#0000000d;color:var(--primary-color)}.btn-vote.voted{color:var(--primary-color);font-weight:700}.btn-delete{color:var(--text-light)}.btn-delete:hover{background-color:#dc354514;color:var(--danger-color)}.comment-thread{display:flex;flex-direction:column}.comment-thread.reply{margin-left:0;margin-top:0}.replies{border-left:2px solid var(--border-color);display:flex;flex-direction:column;gap:0;margin-left:12px;margin-top:0;padding-left:16px;position:relative}.replies:hover{border-left-color:var(--primary-color)}.reply-form{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;margin-top:8px;padding:12px}.reply-form textarea{font-size:13px;margin-bottom:8px;resize:vertical}.reply-actions{display:flex;gap:8px;justify-content:flex-end}@media (max-width:768px){.post-detail{padding:20px}.post-detail h1{font-size:24px}.comments-section{padding:20px}}.comment-collapsed{border-left:2px solid var(--border-color);cursor:pointer;margin-left:12px;padding:8px 16px;transition:all .2s}.comment-collapsed:hover{background:var(--hover-bg);border-left-color:var(--accent-color)}.collapsed-indicator{color:var(--accent-color);font-size:13px;font-weight:500}.btn-collapse{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:12px;padding:2px 6px}.btn-collapse:hover{color:var(--accent-color)}.block-editor{display:flex;flex-direction:column;gap:0}.block-item{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;overflow:hidden;transition:box-shadow .2s,opacity .2s}.block-item:hover{box-shadow:0 2px 8px #0000001a}.block-item.dragging{opacity:.5}.block-toolbar{align-items:center;background:var(--hover-bg);border-bottom:1px solid var(--border-color);display:flex;font-size:13px;gap:8px;padding:6px 12px}.block-type-indicator{align-items:center;color:var(--text-secondary);display:flex;font-weight:600;gap:6px}.block-drag-handle{cursor:grab;font-size:16px;opacity:.5;-webkit-user-select:none;user-select:none}.block-drag-handle:active{cursor:grabbing}.block-lang-select{background:var(--input-bg);border:1px solid var(--border-color);border-radius:4px;color:var(--text-color);font-size:12px;padding:2px 8px}.block-actions{display:flex;gap:4px;margin-left:auto}.block-btn{background:none;border:1px solid var(--border-color);border-radius:4px;color:var(--text-secondary);cursor:pointer;font-size:12px;padding:2px 6px;transition:all .2s}.block-btn:hover:not(:disabled){background:var(--hover-bg);color:var(--text-color)}.block-btn:disabled{cursor:not-allowed;opacity:.3}.block-btn-danger:hover:not(:disabled){background:#f44;border-color:#f44;color:#fff}.block-code-textarea,.block-textarea{background:var(--card-bg);border:none;box-sizing:border-box;color:var(--text-color);font-size:14px;outline:none;padding:12px 16px;resize:vertical;width:100%}.block-code-textarea{background:#1e1e1e;background:var(--code-bg,#1e1e1e);color:#d4d4d4;color:var(--code-color,#d4d4d4);font-family:Fira Code,Cascadia Code,JetBrains Mono,Consolas,monospace;font-size:13px;line-height:1.5;tab-size:2}.block-add-row{display:flex;gap:8px;justify-content:center;opacity:0;padding:6px;transition:opacity .2s}.block-item:hover .block-add-row{opacity:1}.block-add-btn{background:none;border:1px dashed var(--border-color);border-radius:6px;color:var(--accent-color);cursor:pointer;font-size:13px;padding:4px 16px;transition:all .2s}.block-add-btn:hover{background:var(--hover-bg);border-style:solid}.block-empty{border:2px dashed var(--border-color);border-radius:8px;display:flex;gap:12px;justify-content:center;padding:40px}.file-upload{margin-top:16px}.upload-dropzone{background:var(--card-bg);border:2px dashed var(--border-color);border-radius:8px;cursor:pointer;padding:24px;text-align:center;transition:all 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