:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;--bg-primary: #0a0a0a;--bg-secondary: #111111;--bg-tertiary: #1a1a1a;--bg-hover: #1f1f1f;--bg-active: #252525;--border: rgba(255, 255, 255, .08);--text-primary: #fafafa;--text-secondary: rgba(255, 255, 255, .55);--text-muted: rgba(255, 255, 255, .35);--accent: #3b82f6;--accent-hover: #2563eb;--sent-bg: #1d4ed8;--received-bg: #1e1e1e;--unread: #ef4444;--avatar-1: #3b82f6;--avatar-2: #8b5cf6;--avatar-3: #10b981;--avatar-4: #f59e0b;--avatar-5: #ef4444}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--bg-primary);color:var(--text-primary)}.messenger{display:flex;height:100vh}.sidebar{width:340px;min-width:340px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-header{padding:20px 20px 0}.sidebar-title{font-size:1.35rem;font-weight:700;letter-spacing:-.02em}.search-wrap{padding:12px 20px}.search-input{width:100%;padding:10px 14px;border-radius:8px;border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text-primary);font-size:.875rem;outline:none;transition:border-color .15s}.search-input::placeholder{color:var(--text-muted)}.search-input:focus{border-color:var(--accent)}.conversation-list{list-style:none;flex:1;overflow-y:auto}.conversation-item{display:flex;align-items:center;gap:12px;padding:12px 20px;cursor:pointer;transition:background .1s}.conversation-item:hover{background:var(--bg-hover)}.conversation-item.active{background:var(--bg-active)}.avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:600;letter-spacing:.02em;color:#fff;flex-shrink:0}.avatar-1{background:var(--avatar-1)}.avatar-2{background:var(--avatar-2)}.avatar-3{background:var(--avatar-3)}.avatar-4{background:var(--avatar-4)}.avatar-5{background:var(--avatar-5)}.conversation-info{flex:1;min-width:0}.conversation-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:2px}.conversation-name{font-weight:600;font-size:.9rem}.conversation-time{font-size:.75rem;color:var(--text-muted);flex-shrink:0;margin-left:8px}.conversation-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px}.conversation-preview{font-size:.8rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.unread-badge{background:var(--unread);color:#fff;font-size:.7rem;font-weight:600;min-width:20px;height:20px;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 6px;flex-shrink:0}.chat-area{flex:1;display:flex;flex-direction:column;background:var(--bg-primary)}.chat-header{display:flex;align-items:center;gap:12px;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--bg-secondary)}.chat-header-info{display:flex;flex-direction:column}.chat-header-name{font-weight:600;font-size:.95rem}.chat-header-status{font-size:.75rem;color:#10b981}.messages-container{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:8px}.message{display:flex}.message-sent{justify-content:flex-end}.message-received{justify-content:flex-start}.message-bubble{max-width:65%;padding:10px 14px;border-radius:18px;position:relative}.message-sent .message-bubble{background:var(--sent-bg);border-bottom-right-radius:4px}.message-received .message-bubble{background:var(--received-bg);border:1px solid var(--border);border-bottom-left-radius:4px}.message-text{font-size:.9rem;line-height:1.45;word-break:break-word}.message-time{display:block;font-size:.65rem;color:#fff6;text-align:right;margin-top:4px}.input-area{display:flex;align-items:flex-end;gap:10px;padding:16px 24px;border-top:1px solid var(--border);background:var(--bg-secondary)}.message-input{flex:1;padding:10px 16px;border-radius:20px;border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text-primary);font-size:.9rem;font-family:inherit;resize:none;outline:none;line-height:1.4;max-height:120px;transition:border-color .15s}.message-input::placeholder{color:var(--text-muted)}.message-input:focus{border-color:var(--accent)}.send-button{width:40px;height:40px;border-radius:50%;border:none;background:var(--accent);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .15s,opacity .15s}.send-button:hover:not(:disabled){background:var(--accent-hover)}.send-button:disabled{opacity:.35;cursor:default}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.empty-icon{color:var(--text-muted);margin-bottom:4px}.empty-title{font-size:1.25rem;font-weight:600;letter-spacing:-.02em}.empty-text{font-size:.9rem;color:var(--text-secondary)}.conversation-list::-webkit-scrollbar,.messages-container::-webkit-scrollbar{width:6px}.conversation-list::-webkit-scrollbar-track,.messages-container::-webkit-scrollbar-track{background:transparent}.conversation-list::-webkit-scrollbar-thumb,.messages-container::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}.conversation-list::-webkit-scrollbar-thumb:hover,.messages-container::-webkit-scrollbar-thumb:hover{background:#fff3}@media(max-width:768px){.sidebar{width:100%;min-width:100%}.chat-area{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10;transform:translate(100%);transition:transform .2s ease}.chat-area.open{transform:translate(0)}}