pre code.hljs{display:block;overflow-x:auto;padding:1em}code.hljs{padding:3px 5px}/*!
  Theme: GitHub Dark Dimmed
  Description: Dark dimmed theme as seen on github.com
  Author: github.com
  Maintainer: @Hirse
  Updated: 2021-05-15

  Colors taken from GitHub's CSS
*/.hljs{color:#adbac7;background:#22272e}.hljs-doctag,.hljs-keyword,.hljs-meta .hljs-keyword,.hljs-template-tag,.hljs-template-variable,.hljs-type,.hljs-variable.language_{color:#f47067}.hljs-title,.hljs-title.class_,.hljs-title.class_.inherited__,.hljs-title.function_{color:#dcbdfb}.hljs-attr,.hljs-attribute,.hljs-literal,.hljs-meta,.hljs-number,.hljs-operator,.hljs-variable,.hljs-selector-attr,.hljs-selector-class,.hljs-selector-id{color:#6cb6ff}.hljs-regexp,.hljs-string,.hljs-meta .hljs-string{color:#96d0ff}.hljs-built_in,.hljs-symbol{color:#f69d50}.hljs-comment,.hljs-code,.hljs-formula{color:#768390}.hljs-name,.hljs-quote,.hljs-selector-tag,.hljs-selector-pseudo{color:#8ddb8c}.hljs-subst{color:#adbac7}.hljs-section{color:#316dca;font-weight:700}.hljs-bullet{color:#eac55f}.hljs-emphasis{color:#adbac7;font-style:italic}.hljs-strong{color:#adbac7;font-weight:700}.hljs-addition{color:#b4f1b4;background-color:#1b4721}.hljs-deletion{color:#ffd8d3;background-color:#78191b}:root{--primary: #6366f1;--primary-hover: #4f46e5;--primary-light: #e0e7ff;--sidebar-bg: #1e1b4b;--sidebar-hover: #312e81;--sidebar-active: #3730a3;--sidebar-text: #e0e7ff;--sidebar-text-muted: #a5b4fc;--main-bg: #f8fafc;--card-bg: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--danger: #ef4444;--danger-hover: #dc2626;--radius: 8px;--radius-lg: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1);--input-bg: #ffffff;--inline-code-bg: #f1f5f9;--inline-code-color: #e11d48;--table-header-bg: #f8fafc;--auth-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--auth-error-bg: #fef2f2;--auth-error-border: #fecaca}html[data-theme=dark]{--primary: #818cf8;--primary-hover: #6366f1;--primary-light: rgba(99, 102, 241, .15);--sidebar-bg: #0f0e1a;--sidebar-hover: #1e1b3a;--sidebar-active: #2d2a52;--sidebar-text: #e0e7ff;--sidebar-text-muted: #a5b4fc;--main-bg: #111118;--card-bg: #1a1a24;--text-primary: #e2e8f0;--text-secondary: #94a3b8;--border: #2d2d3d;--danger: #f87171;--danger-hover: #ef4444;--shadow: 0 1px 3px rgba(0, 0, 0, .3);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .4);--input-bg: #1e1e2a;--inline-code-bg: #2a2a3a;--inline-code-color: #fb7185;--table-header-bg: #1e1e2a;--auth-gradient: linear-gradient(135deg, #312e81 0%, #4c1d95 100%);--auth-error-bg: rgba(239, 68, 68, .1);--auth-error-border: rgba(239, 68, 68, .3)}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{height:100%;height:-webkit-fill-available;overflow:hidden;background:var(--card-bg)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--text-primary);background:var(--main-bg);-webkit-font-smoothing:antialiased;height:100%;height:-webkit-fill-available;overflow:hidden;overscroll-behavior:none;-webkit-text-size-adjust:100%}#root{height:100%;height:100dvh;overflow:hidden;position:fixed;top:0;left:0;right:0;bottom:0}input,textarea,select,button{touch-action:manipulation}.auth-page{min-height:100vh;min-height:100dvh;display:flex;align-items:center;justify-content:center;background:var(--auth-gradient);padding:20px;padding-bottom:max(20px,env(safe-area-inset-bottom));overflow-y:auto}.auth-form{background:var(--card-bg);padding:40px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:400px}.auth-logo{text-align:center;margin-bottom:32px;color:var(--primary)}.auth-logo h1{font-size:28px;margin-top:8px;color:var(--text-primary)}.auth-logo p{color:var(--text-secondary);margin-top:4px;font-size:14px}.auth-error{background:var(--auth-error-bg);color:var(--danger);padding:10px 14px;border-radius:var(--radius);font-size:14px;margin-bottom:16px;border:1px solid var(--auth-error-border)}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text-primary)}.form-group input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:16px;transition:border-color .2s;outline:none;background:var(--input-bg);color:var(--text-primary)}.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.forgot-password{display:block;text-align:right;font-size:13px;color:var(--primary);text-decoration:none;margin-top:-8px;margin-bottom:8px;font-weight:500}.forgot-password:hover{text-decoration:underline}.btn-primary{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;transition:background .2s;margin-top:8px}.btn-primary:hover{background:var(--primary-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.auth-switch{text-align:center;margin-top:20px;font-size:14px;color:var(--text-secondary)}.auth-switch a{color:var(--primary);text-decoration:none;font-weight:500}.auth-switch a:hover{text-decoration:underline}.main-layout{display:flex;height:100%;overflow:hidden;position:relative}.sidebar{width:300px;min-width:300px;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;border-right:1px solid rgba(255,255,255,.1);transition:width .25s ease,min-width .25s ease,opacity .2s ease;overflow:hidden;height:100%}.sidebar-collapsed{width:0;min-width:0;opacity:0;border-right:none;pointer-events:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 12px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700}.sidebar-search{display:flex;align-items:center;gap:8px;margin:12px 12px 8px;padding:8px 12px;background:#ffffff1a;border-radius:var(--radius);color:var(--sidebar-text-muted)}.sidebar-search input{flex:1;background:none;border:none;outline:none;color:var(--sidebar-text);font-size:13px}.sidebar-search input::placeholder{color:var(--sidebar-text-muted)}.new-topic-input{display:flex;align-items:center;gap:4px;padding:8px 12px;margin:0 12px 8px}.new-topic-input input{flex:1;padding:6px 10px;background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius);color:var(--sidebar-text);font-size:13px;outline:none}.new-topic-input input:focus{border-color:var(--primary)}.topic-list{flex:1;overflow-y:auto;padding:4px 8px}.topic-item{display:flex;align-items:center;padding:10px 12px;border-radius:var(--radius);cursor:pointer;transition:background .15s;gap:8px}.topic-item:hover{background:var(--sidebar-hover)}.topic-item.active{background:var(--sidebar-active)}.topic-info{flex:1;min-width:0}.topic-title{display:block;font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topic-meta{display:block;font-size:12px;color:var(--sidebar-text-muted);margin-top:2px}.topic-actions{display:none;gap:2px}.topic-item:hover .topic-actions{display:flex}.topic-editing{display:flex;align-items:center;gap:4px;width:100%}.topic-editing input{flex:1;padding:4px 8px;background:#ffffff26;border:1px solid rgba(255,255,255,.3);border-radius:4px;color:var(--sidebar-text);font-size:13px;outline:none}.sidebar-footer{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-top:1px solid rgba(255,255,255,.1)}.user-info{display:flex;align-items:center;gap:10px}.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}.user-name{font-size:14px;font-weight:500}.sidebar-loading,.sidebar-empty{padding:20px;text-align:center;color:var(--sidebar-text-muted);font-size:13px}.btn-icon{background:none;border:none;color:inherit;cursor:pointer;padding:6px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;transition:background .15s}.btn-icon:hover{background:#ffffff26}.btn-icon-sm{background:none;border:none;color:inherit;cursor:pointer;padding:4px;border-radius:4px;display:flex;align-items:center;justify-content:center;transition:background .15s;opacity:.7}.btn-icon-sm:hover{opacity:1;background:#ffffff1a}.btn-icon-sm.danger:hover{color:var(--danger)}.content-area{flex:1;display:flex;flex-direction:column;background:var(--main-bg);min-width:0;min-height:0;overflow:hidden}.content-toolbar{padding:10px 16px;background:var(--card-bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;flex-shrink:0}.content-toolbar h2{font-size:18px;font-weight:600}.sidebar-toggle{color:var(--text-secondary);flex-shrink:0}.sidebar-toggle:hover{color:var(--primary);background:var(--primary-light)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-secondary);gap:12px}.empty-state h2{font-size:20px;color:var(--text-primary)}.empty-state p{font-size:14px}.message-list{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:20px 24px;display:flex;flex-direction:column;gap:12px;min-height:0}.message-list-loading,.message-list-empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:14px}.message-item{position:relative;background:var(--card-bg);border-radius:var(--radius-lg);padding:14px 18px;box-shadow:var(--shadow);max-width:80%;transition:box-shadow .2s}.message-item:hover{box-shadow:var(--shadow-lg)}.message-content{display:flex;flex-direction:column;gap:8px}.markdown-body{font-size:14px;line-height:1.7;word-break:break-word}.markdown-body p{margin:0 0 8px;white-space:pre-wrap}.markdown-body p:last-child{margin-bottom:0}.markdown-body a{color:var(--primary);text-decoration:none}.markdown-body a:hover{text-decoration:underline}.markdown-body strong{font-weight:600}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{margin:12px 0 6px;font-weight:600;line-height:1.3}.markdown-body h1{font-size:1.4em}.markdown-body h2{font-size:1.25em}.markdown-body h3{font-size:1.1em}.markdown-body ul,.markdown-body ol{margin:4px 0 8px;padding-left:24px}.markdown-body li{margin-bottom:2px}.markdown-body li>p{margin:0}.markdown-body blockquote{margin:8px 0;padding:4px 14px;border-left:3px solid var(--primary);color:var(--text-secondary);background:var(--primary-light);border-radius:0 var(--radius) var(--radius) 0}.markdown-body blockquote p{margin:0}.markdown-body code{font-family:SF Mono,Fira Code,Fira Mono,Menlo,Consolas,monospace;font-size:.9em;background:var(--inline-code-bg);padding:2px 6px;border-radius:4px;color:var(--inline-code-color)}.markdown-body pre{margin:0;padding:14px 16px;background:transparent;overflow-x:auto}.markdown-body pre code{background:none;padding:0;font-size:13px;line-height:1.5}.code-block{margin:8px 0;border-radius:var(--radius);overflow:hidden;background:#22272e}.code-block pre{margin:0;padding:14px 16px}.code-block .hljs{background:transparent;padding:0}.code-block-header{display:flex;align-items:center;justify-content:space-between;padding:6px 12px 6px 16px;background:#ffffff0f;border-bottom:1px solid rgba(255,255,255,.08)}.code-block-lang{font-size:12px;color:#ffffff73;font-family:inherit;text-transform:lowercase}.code-copy-btn{display:flex;align-items:center;gap:5px;padding:4px 10px;background:#ffffff14;border:none;border-radius:6px;color:#fff9;font-size:12px;cursor:pointer;transition:background .15s,color .15s}.code-copy-btn:hover{background:#ffffff26;color:#ffffffe6}.markdown-body hr{border:none;border-top:1px solid var(--border);margin:12px 0}.markdown-body table{width:100%;border-collapse:collapse;margin:8px 0;font-size:13px}.markdown-body th,.markdown-body td{padding:6px 12px;border:1px solid var(--border);text-align:left}.markdown-body th{background:var(--table-header-bg);font-weight:600}.markdown-body img{max-width:100%;border-radius:var(--radius)}.markdown-body input[type=checkbox]{margin-right:6px}.msg-actions-top{position:absolute;top:6px;right:6px;opacity:0;transition:opacity .15s;z-index:2}.message-item:hover .msg-actions-top,.message-item.menu-open .msg-actions-top{opacity:1}.msg-more-btn{color:var(--text-secondary);opacity:.7}.msg-more-btn:hover{opacity:1;color:var(--text-primary);background:var(--primary-light)!important}.msg-dropdown{position:absolute;top:100%;right:0;margin-top:4px;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:4px;min-width:140px;animation:dropdown-in .12s ease}@keyframes dropdown-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.msg-dropdown button{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;border:none;background:none;color:var(--text-primary);font-size:13px;font-family:inherit;cursor:pointer;border-radius:4px;transition:background .1s,color .1s}.msg-dropdown button:hover{background:var(--primary-light);color:var(--primary)}.copy-toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%);background:var(--text-primary);color:var(--main-bg);padding:8px 22px;border-radius:20px;font-size:13px;font-weight:500;z-index:10001;pointer-events:none;animation:toast-in .15s ease}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(8px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.inline-code-copyable{cursor:pointer;transition:background .15s,color .15s}.inline-code-copied{background:var(--primary)!important;color:#fff!important}.message-image-preview{max-width:100%;max-height:360px;border-radius:var(--radius);object-fit:contain;cursor:pointer;transition:opacity .2s;display:block}.message-image-preview:hover{opacity:.85}.message-video-wrapper{position:relative;display:inline-block}.message-video-preview{max-width:100%;max-height:360px;border-radius:var(--radius);display:block}.video-fullscreen-btn{position:absolute;top:8px;right:8px;background:#0000008c;color:#fff;border:none;border-radius:6px;padding:6px 8px;cursor:pointer;display:flex;align-items:center;gap:4px;font-size:12px;opacity:0;transition:opacity .2s}.message-video-wrapper:hover .video-fullscreen-btn{opacity:1}.message-audio-preview{width:100%;max-width:360px;display:block}.media-loading{display:flex;align-items:center;justify-content:center;height:80px;color:var(--text-secondary)}@keyframes spin{to{transform:rotate(360deg)}}.spin{animation:spin 1s linear infinite}.lightbox-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;background:#000000eb;display:flex;flex-direction:column;animation:lightbox-fade-in .2s ease}@keyframes lightbox-fade-in{0%{opacity:0}to{opacity:1}}.lightbox-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;flex-shrink:0}.lightbox-filename{color:#fffc;font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lightbox-close{background:#ffffff1a;border:none;color:#fff;width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s;flex-shrink:0}.lightbox-close:hover{background:#fff3}.lightbox-body{flex:1;display:flex;align-items:center;justify-content:center;padding:0 40px;min-height:0}.lightbox-media{max-width:100%;max-height:100%;object-fit:contain;border-radius:6px;-webkit-user-select:none;user-select:none}video.lightbox-media{max-height:80vh}.lightbox-toolbar{display:flex;align-items:center;justify-content:center;gap:12px;padding:16px 20px 24px;flex-shrink:0}.lightbox-btn{display:flex;align-items:center;gap:8px;padding:10px 22px;background:#ffffff1f;color:#fff;border:1px solid rgba(255,255,255,.15);border-radius:10px;font-size:14px;font-weight:500;cursor:pointer;transition:background .15s,border-color .15s}.lightbox-btn:hover{background:#fff3;border-color:#ffffff4d}.message-file{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--primary-light);border-radius:var(--radius);color:var(--primary)}.message-file .file-name{flex:1;font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-footer{display:flex;align-items:center;justify-content:space-between;margin-top:6px}.message-time{font-size:11px;color:var(--text-secondary)}.message-footer .btn-icon-sm{opacity:0;color:var(--text-secondary)}.message-item:hover .message-footer .btn-icon-sm{opacity:.6}.message-item:hover .message-footer .btn-icon-sm:hover{opacity:1;color:var(--danger)}.confirm-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10000;background:#0000008c;display:flex;align-items:center;justify-content:center;animation:confirm-fade-in .15s ease}.confirm-modal{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:28px 32px 22px;max-width:340px;width:90%;text-align:center;box-shadow:0 16px 48px #0000004d;animation:confirm-scale-in .18s ease}.confirm-modal-icon{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:50%;background:#ef44441f;color:var(--danger);margin-bottom:14px}.confirm-modal-title{margin:0 0 6px;font-size:17px;font-weight:600;color:var(--text-primary)}.confirm-modal-text{margin:0 0 22px;font-size:13px;color:var(--text-secondary)}.confirm-modal-actions{display:flex;gap:10px}.confirm-modal-btn{flex:1;padding:10px 0;border:none;border-radius:8px;font-size:14px;font-weight:500;font-family:inherit;cursor:pointer;transition:background .15s,transform .1s}.confirm-modal-btn:active{transform:scale(.97)}.confirm-modal-btn.cancel{background:var(--input-bg);color:var(--text-primary)}.confirm-modal-btn.cancel:hover{background:var(--border)}.confirm-modal-btn.danger{background:var(--danger);color:#fff}.confirm-modal-btn.danger:hover{background:#dc2626}@keyframes confirm-fade-in{0%{opacity:0}to{opacity:1}}@keyframes confirm-scale-in{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.message-input-area{padding:12px 24px;background:var(--card-bg);border-top:1px solid var(--border);flex-shrink:0}.file-preview-bar{display:flex;align-items:center;gap:10px;padding:8px 12px;margin-bottom:8px;background:var(--primary-light);border-radius:var(--radius);color:var(--primary)}.file-preview-thumb{width:48px;height:48px;object-fit:cover;border-radius:6px;flex-shrink:0;border:1px solid rgba(99,102,241,.2)}.file-preview-info{flex:1;display:flex;align-items:center;gap:6px;min-width:0}.file-preview-name{font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-preview-size{font-size:11px;opacity:.7;flex-shrink:0}.input-row{display:flex;align-items:center;gap:8px}.input-row .btn-icon{color:var(--text-secondary);flex-shrink:0}.input-row .btn-icon:hover{color:var(--primary);background:var(--primary-light)}.input-editable{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:inherit;outline:none;overflow-y:auto;max-height:360px;min-height:42px;line-height:1.5;transition:border-color .2s;background:var(--input-bg);color:var(--text-primary);white-space:pre-wrap;word-break:break-word;-webkit-user-select:text;user-select:text}.input-editable:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.input-editable:empty:before{content:attr(data-placeholder);color:var(--text-secondary);pointer-events:none}.btn-send{background:var(--primary);color:#fff;border:none;border-radius:var(--radius);padding:10px 14px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s;flex-shrink:0}.btn-send:hover{background:var(--primary-hover)}.btn-send:disabled{opacity:.4;cursor:not-allowed}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#00000026;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#00000040}.profile-page{flex:1;display:flex;flex-direction:column;background:var(--main-bg);min-width:0}.profile-header{display:flex;align-items:center;gap:12px;padding:12px 20px;background:var(--card-bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow);flex-shrink:0}.profile-header h2{font-size:18px;font-weight:600;color:var(--text-primary)}.profile-body{flex:1;overflow-y:auto;padding:32px 24px;display:flex;flex-direction:column;align-items:center}.profile-card{background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:32px;width:100%;max-width:480px}.profile-user-section{display:flex;flex-direction:column;align-items:center;gap:12px;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--border)}.profile-avatar{width:72px;height:72px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:28px;color:#fff}.profile-username{font-size:20px;font-weight:600;color:var(--text-primary)}.profile-section-title{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:16px}.theme-options{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.theme-option{display:flex;flex-direction:column;align-items:center;gap:10px;padding:20px 16px;border:2px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:border-color .2s,box-shadow .2s,background .2s;background:var(--main-bg)}.theme-option:hover{border-color:var(--primary);background:var(--primary-light)}.theme-option.active{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.theme-preview{width:64px;height:44px;border-radius:8px;border:1px solid var(--border);overflow:hidden;display:flex}.theme-preview-sidebar{width:30%;height:100%}.theme-preview-content{width:70%;height:100%}.theme-preview-light .theme-preview-sidebar{background:#1e1b4b}.theme-preview-light .theme-preview-content{background:#f8fafc}.theme-preview-dark .theme-preview-sidebar{background:#0f0e1a}.theme-preview-dark .theme-preview-content{background:#111118}.theme-option-label{font-size:14px;font-weight:500;color:var(--text-primary)}.user-info-link{display:flex;align-items:center;gap:10px;cursor:pointer;border-radius:var(--radius);padding:4px 8px;margin:-4px -8px;transition:background .15s}.user-info-link:hover{background:#ffffff1a}.admin-menu{width:100%;max-width:480px;display:flex;flex-direction:column;gap:12px}.admin-menu-item{display:flex;align-items:center;gap:16px;padding:20px 24px;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:border-color .2s,box-shadow .2s;text-align:left;font-family:inherit;color:inherit}.admin-menu-item:hover{border-color:var(--primary);box-shadow:var(--shadow-lg)}.admin-menu-icon{width:48px;height:48px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}.admin-menu-text{display:flex;flex-direction:column;gap:4px}.admin-menu-title{font-size:16px;font-weight:600;color:var(--text-primary)}.admin-menu-desc{font-size:13px;color:var(--text-secondary)}.admin-users-card{width:100%;max-width:600px;background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden}.admin-loading{padding:40px 20px;text-align:center;color:var(--text-secondary);font-size:14px}.admin-users-list{display:flex;flex-direction:column}.admin-user-row{border-bottom:1px solid var(--border);padding:16px 20px}.admin-user-row:last-child{border-bottom:none}.admin-user-main{display:flex;align-items:center;gap:12px}.admin-user-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px;flex-shrink:0}.admin-user-info{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.admin-user-name{font-size:15px;font-weight:500;color:var(--text-primary);display:flex;align-items:center;gap:8px}.admin-badge{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:10px;background:var(--primary-light);color:var(--primary)}.admin-user-date{font-size:12px;color:var(--text-secondary)}.admin-pwd-btn{color:var(--text-secondary);flex-shrink:0}.admin-pwd-btn:hover{color:var(--primary);background:var(--primary-light)!important}.admin-pwd-form{display:flex;align-items:center;gap:10px;margin-top:12px;padding-left:52px}.admin-pwd-input-wrap{flex:1;position:relative;display:flex;align-items:center}.admin-pwd-input-wrap input{width:100%;padding:8px 36px 8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;outline:none;background:var(--input-bg);color:var(--text-primary);font-family:inherit;transition:border-color .2s}.admin-pwd-input-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.admin-pwd-eye{position:absolute;right:4px;color:var(--text-secondary);padding:4px}.admin-pwd-eye:hover{color:var(--text-primary);background:transparent!important}.admin-pwd-save{padding:8px 18px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:13px;font-weight:600;cursor:pointer;transition:background .2s;white-space:nowrap;font-family:inherit}.admin-pwd-save:hover{background:var(--primary-hover)}.admin-pwd-save:disabled{opacity:.5;cursor:not-allowed}.admin-user-clickable{cursor:pointer}.admin-user-info.admin-user-clickable:hover .admin-user-name{color:var(--primary)}.admin-activity{width:100%;max-width:600px;display:flex;flex-direction:column;gap:20px}.admin-activity-header{display:flex;align-items:center;gap:16px;padding:24px;background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.admin-activity-avatar{width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:22px;flex-shrink:0}.admin-activity-user{display:flex;flex-direction:column;gap:4px;min-width:0}.admin-activity-name{font-size:18px;font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:8px}.admin-activity-joined{font-size:13px;color:var(--text-secondary)}.admin-stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.admin-stat-card{background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:20px 16px;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}.admin-stat-icon{width:40px;height:40px;border-radius:10px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center}.admin-stat-value{font-size:24px;font-weight:700;color:var(--text-primary);line-height:1.2}.admin-stat-value-sm{font-size:14px;font-weight:600}.admin-stat-label{font-size:12px;color:var(--text-secondary);font-weight:500}.admin-recent-topics{background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden}.admin-section-title{font-size:15px;font-weight:600;color:var(--text-primary);padding:16px 20px 0;margin:0}.admin-topics-list{display:flex;flex-direction:column;padding:12px 0}.admin-topic-row{padding:10px 20px;transition:background .15s}.admin-topic-row:hover{background:var(--hover-bg)}.admin-topic-info{display:flex;flex-direction:column;gap:2px}.admin-topic-title{font-size:14px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.admin-topic-meta{font-size:12px;color:var(--text-secondary)}.admin-empty-activity{padding:40px 20px;text-align:center;color:var(--text-secondary);font-size:14px;background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.admin-danger-zone{margin-top:8px}.admin-delete-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 20px;background:var(--card-bg);border:1px solid #e53e3e40;border-radius:var(--radius-lg);color:#e53e3e;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;transition:background .2s,border-color .2s}.admin-delete-btn:hover{background:#e53e3e10;border-color:#e53e3e}.admin-confirm-delete{background:var(--card-bg);border:1px solid #e53e3e;border-radius:var(--radius-lg);padding:20px}.admin-confirm-delete p{margin:0 0 16px;font-size:14px;color:var(--text-primary);line-height:1.5}.admin-confirm-actions{display:flex;gap:10px;justify-content:flex-end}.admin-confirm-cancel{padding:8px 18px;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-weight:600;cursor:pointer;color:var(--text-primary);font-family:inherit;transition:background .2s}.admin-confirm-cancel:hover{background:var(--hover-bg)}.admin-confirm-yes{padding:8px 18px;background:#e53e3e;border:none;border-radius:var(--radius);font-size:13px;font-weight:600;cursor:pointer;color:#fff;font-family:inherit;transition:background .2s}.admin-confirm-yes:hover{background:#c53030}.admin-confirm-yes:disabled,.admin-confirm-cancel:disabled{opacity:.5;cursor:not-allowed}.sidebar-backdrop{display:none}@media (max-width: 768px){.sidebar{position:fixed;top:0;left:0;bottom:0;z-index:200;width:85vw;max-width:320px;min-width:0;box-shadow:4px 0 24px #00000059;transform:translate(0);transition:transform .25s ease,opacity .2s ease}.sidebar-collapsed{transform:translate(-100%);opacity:0;pointer-events:none;box-shadow:none}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:150;background:#00000073;animation:backdrop-fade-in .2s ease}@keyframes backdrop-fade-in{0%{opacity:0}to{opacity:1}}.content-area{width:100%}.content-toolbar{padding:8px 12px;padding-top:max(8px,env(safe-area-inset-top))}.content-toolbar h2{font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.message-list{padding:12px;gap:10px}.message-item{max-width:100%;padding:10px 14px}.message-footer .btn-icon-sm{opacity:.6}.msg-actions-top{opacity:1}.message-input-area{padding:8px 12px}.input-editable{font-size:16px;min-height:40px}.sidebar-search input,.new-topic-input input,.topic-editing input{font-size:16px}.auth-page{padding:16px;padding-bottom:max(16px,env(safe-area-inset-bottom));align-items:flex-start;padding-top:max(10vh,env(safe-area-inset-top))}.auth-form{padding:28px 20px}.auth-logo h1{font-size:24px}.empty-state{padding-bottom:max(20px,env(safe-area-inset-bottom))}.empty-state h2{font-size:18px}.empty-state p{font-size:13px;text-align:center;padding:0 20px}.lightbox-header{padding-top:max(14px,env(safe-area-inset-top))}.lightbox-body{padding:0 12px}.lightbox-toolbar{padding:12px 12px 20px;padding-bottom:max(20px,env(safe-area-inset-bottom));gap:8px}.lightbox-btn{padding:8px 16px;font-size:13px}.code-block pre,.markdown-body pre{padding:10px 12px}.message-image-preview,.message-video-preview{max-height:240px}.video-fullscreen-btn{opacity:1}.file-preview-bar{padding:6px 10px}.file-preview-thumb{width:40px;height:40px}.sidebar-header{padding-top:max(16px,env(safe-area-inset-top))}.sidebar-footer{padding:10px 14px;padding-bottom:max(10px,env(safe-area-inset-bottom))}.topic-actions{display:flex}.profile-header{padding-top:max(12px,env(safe-area-inset-top))}.profile-body{padding:20px 16px}.profile-card{padding:24px 16px}.admin-menu-item{padding:16px 18px}.admin-user-row{padding:14px 16px}.admin-pwd-form{padding-left:0;flex-wrap:wrap}.admin-pwd-input-wrap{min-width:0}.admin-pwd-input-wrap input{font-size:16px}.admin-stats-grid{grid-template-columns:1fr}.admin-stat-card{flex-direction:row;padding:14px 16px;gap:12px;text-align:left}.admin-stat-icon{width:36px;height:36px}.admin-stat-value{font-size:18px}.admin-activity-header{padding:18px 16px}.admin-activity-avatar{width:48px;height:48px;font-size:18px}.admin-topic-row{padding:10px 16px}}