:root{--bg-base: #111b21;--bg-sidebar: #111b21;--bg-main: #0b141a;--bg-bubble-in: #202c33;--bg-bubble-out: #005c4b;--bg-hover: #2a3942;--bg-active: #2a3942;--bg-header: #202c33;--bg-input: #2a3942;--green: #25d366;--green-dark: #128c7e;--blue-tick: #53bdeb;--text-primary: #e9edef;--text-secondary: #8696a0;--text-meta: #667781;--border: #2a3942;--radius-bubble: 7.5px;--radius-avatar: 50%;--font: "Segoe UI", system-ui, -apple-system, sans-serif;--transition: .15s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg-base);color:var(--text-primary);height:100dvh;overflow:hidden}#root{height:100dvh}.app-shell{display:flex;height:100dvh;overflow:hidden}.sidebar{width:360px;min-width:300px;max-width:400px;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bg-header);border-bottom:1px solid var(--border)}.sidebar-brand{display:flex;align-items:center;gap:10px}.brand-icon{font-size:22px}.brand-name{font-size:17px;font-weight:600;color:var(--text-primary)}.btn-refresh{background:none;border:none;color:var(--text-secondary);font-size:20px;cursor:pointer;padding:4px 8px;border-radius:50%;transition:var(--transition)}.btn-refresh:hover{background:var(--bg-hover);color:var(--green)}.chatlist{display:flex;flex-direction:column;flex:1;overflow:hidden}.search-wrap{padding:8px 12px;background:var(--bg-sidebar);border-bottom:1px solid var(--border)}.search-input{width:100%;padding:8px 14px;border-radius:8px;border:none;background:var(--bg-input);color:var(--text-primary);font-size:14px;outline:none}.search-input::placeholder{color:var(--text-meta)}.search-input:focus{box-shadow:0 0 0 2px var(--green-dark)}.chatlist-ul{list-style:none;flex:1;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.chat-item{display:flex;align-items:center;gap:12px;padding:12px 16px;cursor:pointer;border-bottom:1px solid var(--border);transition:background var(--transition)}.chat-item:hover{background:var(--bg-hover)}.chat-item--active{background:var(--bg-active)}.avatar{width:46px;height:46px;border-radius:var(--radius-avatar);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;color:#fff;flex-shrink:0;overflow:hidden}.avatar img{width:100%;height:100%;object-fit:cover}.chat-info{flex:1;min-width:0}.chat-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:3px}.chat-name{font-size:15px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-time{font-size:11px;color:var(--text-meta);flex-shrink:0}.chat-bottom{display:flex;align-items:center;justify-content:space-between}.chat-preview{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:calc(100% - 28px)}.unread-badge{background:var(--green);color:#111;font-size:11px;font-weight:700;min-width:20px;height:20px;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 5px;flex-shrink:0}.chatlist-loading{padding:8px}.skeleton-item{display:flex;align-items:center;gap:12px;padding:12px 8px}.skeleton{background:var(--bg-hover);border-radius:4px;animation:shimmer 1.4s infinite}.skeleton-avatar{width:46px;height:46px;border-radius:50%;flex-shrink:0}.skeleton-info{flex:1}.skeleton-name{height:14px;width:60%;margin-bottom:8px}.skeleton-msg{height:12px;width:85%}@keyframes shimmer{0%,to{opacity:.4}50%{opacity:.7}}.chatlist-empty{text-align:center;color:var(--text-meta);padding:40px 16px;font-size:14px}.main{flex:1;display:flex;flex-direction:column;background:var(--bg-main);overflow:hidden;position:relative}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--text-meta)}.empty-icon{font-size:64px;opacity:.3}.empty-state h2{font-size:22px;color:var(--text-secondary)}.empty-state p{font-size:14px}.chat-window{display:flex;flex-direction:column;height:100%;overflow:hidden}.chat-header{display:flex;align-items:center;gap:12px;padding:10px 20px;background:var(--bg-header);border-bottom:1px solid var(--border);flex-shrink:0}.chat-header-avatar{width:40px;height:40px;border-radius:50%;background:var(--green-dark);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}.chat-header-info{flex:1}.chat-header-name{display:block;font-size:16px;font-weight:600}.chat-header-phone{font-size:12px;color:var(--text-meta)}.chat-header-badge{font-size:11px;background:#1a3a2a;color:var(--green);border:1px solid var(--green-dark);padding:2px 8px;border-radius:12px}.messages-area{flex:1;overflow-y:auto;padding:16px;scrollbar-width:thin;scrollbar-color:var(--border) transparent;background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23182229' fill-opacity='0.6'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}.messages-loading,.messages-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:12px;color:var(--text-meta)}.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--green);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.date-divider{display:flex;justify-content:center;margin:12px 0}.date-divider span{background:var(--bg-header);color:var(--text-meta);font-size:12px;padding:4px 12px;border-radius:8px}.bubble-row{display:flex;margin-bottom:2px}.bubble-row--in{justify-content:flex-start}.bubble-row--out{justify-content:flex-end}.bubble{max-width:65%;padding:6px 10px 4px;border-radius:var(--radius-bubble);position:relative;word-break:break-word}.bubble--in{background:var(--bg-bubble-in);border-top-left-radius:0}.bubble--out{background:var(--bg-bubble-out);border-top-right-radius:0}.bubble-text{font-size:14.2px;line-height:1.5;color:var(--text-primary)}.bubble-meta{display:flex;align-items:center;justify-content:flex-end;gap:4px;margin-top:2px}.bubble-time,.bubble-status{font-size:11px;color:var(--text-meta)}.status--read{color:var(--blue-tick)}.bubble-media{max-width:260px}.media-img,.media-video{width:100%;border-radius:6px;display:block}.media-caption{font-size:13px;color:var(--text-secondary);margin-top:4px}.media-placeholder{padding:20px;background:var(--bg-input);border-radius:6px;color:var(--text-meta);text-align:center}.bubble-doc{display:flex;align-items:flex-start;gap:10px;padding:4px 2px;min-width:200px;max-width:280px}.doc-icon-wrap{display:flex;flex-direction:column;align-items:center;gap:2px;flex-shrink:0}.doc-icon{font-size:26px}.doc-ext{font-size:9px;font-weight:700;color:var(--text-meta);letter-spacing:.5px}.doc-info{display:flex;flex-direction:column;gap:3px;min-width:0}.doc-name{font-size:13px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}.doc-caption{font-size:12px;color:var(--text-secondary)}.doc-download{font-size:12px;color:var(--green);text-decoration:none}.doc-download:hover{text-decoration:underline}.doc-unavailable{font-size:12px;color:var(--text-meta)}.bubble-audio{display:flex;align-items:flex-start;gap:10px;min-width:220px;max-width:280px}.audio-icon{font-size:24px;flex-shrink:0;margin-top:2px}.audio-body{display:flex;flex-direction:column;gap:5px;flex:1}.audio-label{font-size:12px;color:var(--text-secondary)}.audio-player{width:100%;height:32px;filter:invert(.85);border-radius:4px}.audio-unavailable{font-size:12px;color:var(--text-meta)}.bubble-sticker{background:transparent!important;padding:0!important;box-shadow:none!important}.sticker-img{width:120px;height:120px;object-fit:contain}.chat-footer{padding:10px 20px;background:var(--bg-header);border-top:1px solid var(--border);text-align:center;font-size:12px;color:var(--text-meta);flex-shrink:0}.mobile-header{display:none;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-header);border-bottom:1px solid var(--border);flex-shrink:0}.hamburger{background:none;border:none;color:var(--text-primary);font-size:20px;cursor:pointer}.overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:10}@media (max-width: 768px){.sidebar{position:fixed;left:-100%;top:0;height:100dvh;width:85vw;z-index:20;transition:left .25s ease}.sidebar--open{left:0}.mobile-header{display:flex}.overlay{display:block}.main{flex:1}}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0a0a0a,#111827,#0d1117);padding:1rem}.login-card{background:#1a1a1a;border:1px solid #2a2a2a;border-radius:16px;padding:2.5rem 2rem;width:100%;max-width:380px;box-shadow:0 20px 60px #0009}.login-brand{text-align:center;margin-bottom:2rem}.login-brand-icon{font-size:2.5rem;display:block;margin-bottom:.5rem}.login-brand-name{font-size:1.5rem;font-weight:700;color:#e8e8e8;margin:0 0 .25rem}.login-brand-sub{font-size:.82rem;color:#555;margin:0}.login-form{display:flex;flex-direction:column;gap:1rem}.login-field{display:flex;flex-direction:column;gap:.4rem}.login-label{font-size:.78rem;color:#888;font-weight:500;letter-spacing:.04em;text-transform:uppercase}.login-input{background:#111;border:1px solid #2e2e2e;border-radius:8px;color:#e8e8e8;font-size:.95rem;padding:.65rem .9rem;outline:none;transition:border-color .2s;width:100%;box-sizing:border-box}.login-input:focus{border-color:#25d366}.login-input::placeholder{color:#3a3a3a}.login-error{background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:8px;color:#f87171;font-size:.83rem;margin:0;padding:.5rem .75rem;text-align:center}.login-btn{background:#25d366;border:none;border-radius:8px;color:#000;cursor:pointer;font-size:.95rem;font-weight:600;margin-top:.5rem;padding:.75rem;transition:background .2s,opacity .2s;width:100%}.login-btn:hover:not(:disabled){background:#1db954}.login-btn--loading,.login-btn:disabled{opacity:.6;cursor:not-allowed}.sidebar-header-actions{display:flex;align-items:center;gap:.25rem}.btn-logout{background:transparent;border:1px solid #2a2a2a;border-radius:6px;color:#888;cursor:pointer;font-size:1rem;height:32px;line-height:1;padding:0 8px;transition:color .2s,border-color .2s}.btn-logout:hover{border-color:#ef4444;color:#ef4444}.btn-logout-mobile{background:transparent;border:none;color:#888;cursor:pointer;font-size:1.1rem;padding:4px 8px;margin-left:auto}.btn-logout-mobile:hover{color:#ef4444}.chat-bottom-right{display:flex;align-items:center;gap:4px;flex-shrink:0}.btn-edit-name{background:transparent;border:none;cursor:pointer;font-size:.7rem;opacity:0;padding:2px 3px;transition:opacity .15s;line-height:1}.chat-item:hover .btn-edit-name{opacity:1}.edit-name-wrap{display:flex;flex-direction:column;gap:5px;padding:2px 0;width:100%}.edit-name-input{background:#111;border:1px solid #25D366;border-radius:6px;color:#e8e8e8;font-size:.85rem;outline:none;padding:5px 8px;width:100%;box-sizing:border-box}.edit-name-error{color:#f87171;font-size:.73rem}.edit-name-actions{display:flex;gap:5px}.edit-name-save{background:#25d366;border:none;border-radius:5px;color:#000;cursor:pointer;font-size:.78rem;font-weight:600;padding:3px 10px}.edit-name-save:disabled{opacity:.5;cursor:not-allowed}.edit-name-cancel{background:transparent;border:1px solid #333;border-radius:5px;color:#888;cursor:pointer;font-size:.78rem;padding:3px 10px}.edit-name-cancel:hover{border-color:#555;color:#bbb}