*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0b141a;--sidebar-bg:#111b21;--chat-bg:#0b141a;--header-bg:#202c33;--input-bg:#2a3942;--msg-out:#005c4b;--msg-in:#202c33;--text:#e9edef;--text-muted:#8696a0;--text-time:#667781;--primary:#00a884;--primary-hover:#06cf9c;--border:#222d34;--hover:#202c33;--danger:#ea4335;--unread:#00a884;--radius:8px;--header-h:56px}html,body,#root{height:100%;overflow:hidden}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.45}.login-page{background:var(--bg);justify-content:center;align-items:center;height:100%;display:flex}.login-card{background:var(--sidebar-bg);border-radius:12px;width:100%;max-width:380px;margin:16px;padding:36px 32px}.login-card h1{text-align:center;font-size:22px;font-weight:600}.login-card .subtitle{text-align:center;color:var(--text-muted);margin:4px 0 28px;font-size:13px}.field{margin-bottom:14px}.field label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px;font-size:12px;font-weight:500;display:block}.field input{background:var(--input-bg);width:100%;color:var(--text);border:none;border-radius:6px;outline:none;padding:10px 12px;font-size:14px}.field input:focus{box-shadow:0 0 0 2px var(--primary)}.btn{cursor:pointer;border:none;border-radius:6px;justify-content:center;align-items:center;gap:6px;padding:10px 20px;font-size:14px;font-weight:500;transition:background .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff;width:100%}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-icon{width:40px;height:40px;color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:0;display:flex}.btn-icon:hover{background:var(--hover);color:var(--text)}.btn-icon svg{width:22px;height:22px}.toggle-mode{text-align:center;color:var(--text-muted);margin-top:16px;font-size:13px}.toggle-mode button{color:var(--primary);cursor:pointer;background:0 0;border:none;font-size:13px}.error-msg{color:var(--danger);margin:8px 0;font-size:13px}.app-shell{height:100%;display:flex;overflow:hidden}.sidebar{background:var(--sidebar-bg);border-right:1px solid var(--border);flex-direction:column;width:380px;min-width:320px;height:100%;display:flex}.sidebar-header{height:var(--header-h);background:var(--header-bg);flex-shrink:0;justify-content:space-between;align-items:center;padding:0 16px;display:flex}.sidebar-header .user-name{font-size:15px;font-weight:500}.search-bar{background:var(--sidebar-bg);flex-shrink:0;padding:8px 12px}.search-bar input{background:var(--input-bg);width:100%;color:var(--text);border:none;border-radius:6px;outline:none;padding:8px 12px;font-size:13px}.search-bar input::placeholder{color:var(--text-muted)}.contact-list{flex:1;overflow:hidden auto}.contact-item{cursor:pointer;border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:12px 16px;transition:background .1s;display:flex;position:relative}.contact-item:hover,.contact-item.active{background:var(--hover)}.avatar{background:var(--primary);color:#fff;text-transform:uppercase;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:18px;font-weight:600;display:flex}.contact-info{flex:1;min-width:0}.contact-top{justify-content:space-between;align-items:baseline;gap:8px;display:flex}.contact-name{white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:400;overflow:hidden}.contact-time{color:var(--text-time);flex-shrink:0;font-size:11px}.contact-preview{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;margin-top:2px;font-size:13px;overflow:hidden}.unread-badge{background:var(--unread);color:#fff;border-radius:10px;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 5px;font-size:11px;font-weight:600;display:flex;position:absolute;top:50%;right:16px;transform:translateY(-50%)}.chat-panel{background:var(--chat-bg);flex-direction:column;flex:1;min-width:0;display:flex}.chat-header{height:var(--header-h);background:var(--header-bg);flex-shrink:0;align-items:center;gap:12px;padding:0 16px;display:flex}.chat-header-info{flex:1;min-width:0}.chat-header-name{white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:500;overflow:hidden}.chat-header-status{color:var(--text-muted);font-size:12px}.chat-actions{gap:4px;display:flex}.messages-area{background:var(--chat-bg);flex-direction:column;flex:1;gap:2px;padding:16px 48px;display:flex;overflow-y:auto}.msg-bubble{word-wrap:break-word;border-radius:8px;max-width:65%;padding:6px 12px 18px;font-size:14px;line-height:1.4;position:relative}.msg-out{background:var(--msg-out);border-top-right-radius:0;align-self:flex-end}.msg-in{background:var(--msg-in);border-top-left-radius:0;align-self:flex-start}.msg-time{color:#ffffff8c;font-size:10px;position:absolute;bottom:4px;right:8px}.msg-date-divider{background:var(--header-bg);color:var(--text-muted);border-radius:6px;align-self:center;margin:8px 0;padding:4px 12px;font-size:12px}.chat-input-bar{background:var(--header-bg);flex-shrink:0;align-items:center;gap:8px;padding:8px 16px;display:flex}.chat-input-bar input{background:var(--input-bg);color:var(--text);border:none;border-radius:6px;outline:none;flex:1;padding:10px 14px;font-size:14px}.chat-input-bar input::placeholder{color:var(--text-muted)}.send-btn{background:var(--primary);cursor:pointer;color:#fff;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.send-btn:hover{background:var(--primary-hover)}.send-btn svg{width:20px;height:20px}.empty-state{color:var(--text-muted);text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;padding:32px;display:flex}.empty-state h2{color:var(--text);font-size:20px;font-weight:400}.empty-state p{max-width:400px;font-size:13px}.call-page{z-index:1000;background:#000;flex-direction:column;display:flex;position:fixed;inset:0}.call-top-bar{z-index:10;background:#0009;flex-shrink:0;justify-content:space-between;align-items:center;height:52px;padding:0 16px;display:flex}.call-top-bar .caller-name{font-size:15px;font-weight:500}.call-top-bar .call-timer{color:var(--text-muted);font-size:13px}.call-video-area{flex:1;position:relative;overflow:hidden}.call-controls{z-index:10;background:#0009;flex-shrink:0;justify-content:center;align-items:center;gap:16px;height:72px;display:flex}.call-ctrl-btn{cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;transition:background .15s;display:flex}.call-ctrl-btn svg{width:24px;height:24px}.ctrl-mic{background:var(--input-bg);color:#fff}.ctrl-mic.muted{background:var(--danger);color:#fff}.ctrl-cam{background:var(--input-bg);color:#fff}.ctrl-cam.off{background:var(--danger);color:#fff}.ctrl-end{background:var(--danger);color:#fff;width:56px;height:56px}.ctrl-end svg{width:28px;height:28px}.loading-screen{height:100%;color:var(--text-muted);justify-content:center;align-items:center;display:flex}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}@media (width<=768px){.sidebar{width:100%;min-width:0}.chat-panel{z-index:100;position:absolute;inset:0}.app-shell{position:relative}.messages-area{padding:12px 16px}.msg-bubble{max-width:85%}.mobile-back{cursor:pointer;width:32px;height:32px;color:var(--text);background:0 0;border:none;justify-content:center;align-items:center;padding:0;display:flex!important}.mobile-back svg{width:22px;height:22px}}@media (width>=769px){.mobile-back{display:none!important}}