*{margin:0;padding:0;box-sizing:border-box}:root{--bg: #ffffff;--bg-secondary: #f4f4f5;--bg-chat: #e5ddd5;--text: #1a1a1a;--text-secondary: #667781;--accent: #00a884;--accent-hover: #008f72;--outgoing: #d9fdd3;--incoming: #ffffff;--border: #e9edef;--header: #008069;--input-bg: #f0f2f5}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);height:100dvh;overflow:hidden;-webkit-tap-highlight-color:transparent}#root{height:100dvh}.app{height:100dvh;display:flex;flex-direction:column;max-width:480px;margin:0 auto;position:relative;background:var(--bg)}.status-dot{position:fixed;top:8px;right:8px;width:8px;height:8px;border-radius:50%;z-index:100}.status-dot.online{background:#22c55e}.status-dot.offline{background:#ef4444}.app-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100dvh;gap:16px;color:var(--text-secondary)}.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-secondary);font-size:15px}.chat-list{display:flex;flex-direction:column;height:100dvh}.chat-list-header{background:var(--header);padding:12px 16px;color:#fff}.chat-list-header h1{font-size:20px;font-weight:600;margin-bottom:10px}.search-box input{width:100%;padding:8px 16px;border:none;border-radius:8px;background:#ffffff26;color:#fff;font-size:14px;outline:none}.search-box input::placeholder{color:#fff9}.chats-scroll{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}.chat-item{display:flex;align-items:center;padding:12px 16px;gap:12px;cursor:pointer;transition:background .15s}.chat-item:active{background:var(--bg-secondary)}.chat-avatar{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:600;flex-shrink:0}.chat-info{flex:1;min-width:0}.chat-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:2px}.chat-name{font-size:16px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-time{font-size:12px;color:var(--text-secondary);flex-shrink:0}.chat-bottom{display:flex;justify-content:space-between;align-items:center}.chat-preview{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-badge{background:var(--accent);color:#fff;font-size:11px;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-window{display:flex;flex-direction:column;height:100dvh;background:var(--bg-chat)}.chat-window-header{display:flex;align-items:center;gap:12px;padding:10px 8px;background:var(--header);color:#fff}.back-btn{background:none;border:none;color:#fff;cursor:pointer;padding:4px;display:flex}.chat-window-info{flex:1}.chat-window-name{font-size:16px;font-weight:500}.messages-container{flex:1;overflow-y:auto;padding:8px 16px;display:flex;flex-direction:column;gap:4px;-webkit-overflow-scrolling:touch}.message{display:flex;gap:6px;max-width:80%}.message.outgoing{align-self:flex-end}.message.incoming{align-self:flex-start}.message-avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;flex-shrink:0;align-self:flex-end}.message-content{padding:6px 10px;border-radius:8px;position:relative}.message.outgoing .message-content{background:var(--outgoing);border-top-right-radius:2px}.message.incoming .message-content{background:var(--incoming);border-top-left-radius:2px;box-shadow:0 1px .5px #0b141a14}.message-sender{font-size:12px;font-weight:600;color:var(--accent);display:block;margin-bottom:2px}.message-reply{font-size:12px;color:var(--text-secondary);border-left:3px solid var(--accent);padding:2px 6px;margin-bottom:4px;background:#0000000d;border-radius:2px}.message-text{font-size:14.2px;line-height:1.4;word-wrap:break-word}.message-time{font-size:11px;color:var(--text-secondary);display:block;text-align:right;margin-top:2px}.reply-preview{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:var(--bg-secondary);border-top:1px solid var(--border);font-size:13px}.reply-preview button{background:none;border:none;font-size:18px;cursor:pointer;color:var(--text-secondary)}.input-area{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--input-bg)}.input-area input{flex:1;padding:10px 16px;border:none;border-radius:24px;background:#fff;font-size:15px;outline:none}.send-btn{width:44px;height:44px;border-radius:50%;border:none;background:var(--accent);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.send-btn:disabled{opacity:.5;cursor:not-allowed}.send-btn:not(:disabled):hover{background:var(--accent-hover)}@media (min-width: 481px){.app{border-left:1px solid var(--border);border-right:1px solid var(--border)}}