*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-chat: #0f172a;--bg-inbound: #1e293b;--bg-outbound: #1e3a5f;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-accent: #60a5fa;--border-color: #475569;--hover-color: rgba(255, 255, 255, .04);--input-bg: #334155;--accent: #2563eb;--accent-hover: #1d4ed8;--success: #22c55e;--danger: #ef4444;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3)}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg-primary);color:var(--text-primary);font-size:14px;height:100vh;overflow:hidden}#root{height:100vh}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;color:var(--text-secondary)}.login-container{display:flex;align-items:center;justify-content:center;height:100vh;background:var(--bg-primary)}.login-card{background:#020617;padding:2.5rem;border-radius:12px;border:1px solid var(--border-color);box-shadow:var(--shadow);width:100%;max-width:380px}.login-card h1{text-align:center;margin-bottom:1.5rem;color:var(--text-primary);font-size:1.5rem;font-weight:600}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.4rem;color:var(--text-secondary);font-size:.875rem}.form-group input{width:100%;padding:10px 14px;border:1px solid var(--border-color);border-radius:6px;background:var(--input-bg);color:var(--text-primary);font-size:14px;font-family:inherit;outline:none;transition:border-color .2s}.form-group input:focus{border-color:var(--accent)}.login-card button{width:100%;padding:10px 20px;border:none;border-radius:6px;background:var(--accent);color:#fff;font-size:14px;font-weight:500;cursor:pointer;margin-top:.5rem;transition:background .2s}.login-card button:hover:not(:disabled){background:var(--accent-hover)}.login-card button:disabled{opacity:.6;cursor:not-allowed}.error-message{color:var(--danger);font-size:.85rem;margin-bottom:.5rem;padding:8px 12px;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:6px}.chat-layout{display:flex;height:100vh}.sidebar{width:340px;min-width:280px;border-right:1px solid var(--border-color);display:flex;flex-direction:column;background:var(--bg-secondary)}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow)}.user-name{font-weight:600;color:var(--text-primary)}.logout-btn{background:none;border:1px solid var(--border-color);color:var(--text-secondary);padding:6px 14px;border-radius:6px;cursor:pointer;font-size:13px;font-weight:500;transition:all .2s}.logout-btn:hover{color:var(--text-primary);border-color:var(--text-secondary)}.main-area{flex:1;display:flex;flex-direction:column;background:var(--bg-chat)}.no-chat-selected{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-secondary);font-size:15px}.conversation-list{flex:1;display:flex;flex-direction:column;overflow:hidden}.conversation-list-header{padding:12px 16px 0}.conversation-list-header h2{font-size:18px;font-weight:600;color:var(--text-primary)}.search-box{padding:8px 16px}.search-box input{width:100%;padding:8px 12px;border:1px solid var(--border-color);border-radius:6px;background:var(--input-bg);color:var(--text-primary);font-size:14px;font-family:inherit;outline:none;transition:border-color .2s}.search-box input:focus{border-color:var(--accent)}.search-box input::placeholder{color:var(--text-secondary)}.conversation-list-items{flex:1;overflow-y:auto}.empty-state{padding:2rem 1rem;text-align:center;color:var(--text-secondary);font-size:14px}.conversation-item{display:flex;align-items:center;padding:12px 16px;cursor:pointer;border-bottom:1px solid rgba(71,85,105,.4);transition:background .2s}.conversation-item:hover{background:var(--hover-color)}.conversation-item.selected{background:#2563eb1a;border-left:3px solid var(--accent);padding-left:13px}.conversation-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#7c3aed);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#fff;flex-shrink:0;margin-right:12px}.conversation-info{flex:1;min-width:0}.conversation-header{display:flex;justify-content:space-between;align-items:baseline}.conversation-name{font-size:14px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-time{font-size:12px;color:var(--text-secondary);flex-shrink:0;margin-left:8px}.conversation-phone{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.chat-window{display:flex;flex-direction:column;height:100%}.chat-header{padding:16px 24px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow)}.chat-header-name{font-weight:600;font-size:16px;color:var(--text-primary)}.chat-header-phone{font-size:13px;color:var(--text-secondary);margin-top:2px}.messages-container{flex:1;overflow-y:auto;padding:16px 24px;display:flex;flex-direction:column;gap:4px}.loading-state,.loading-more{text-align:center;color:var(--text-secondary);padding:16px;font-size:14px}.message-bubble{max-width:65%;padding:8px 10px;border-radius:12px;position:relative;word-wrap:break-word}.message-bubble.inbound{align-self:flex-start;background:var(--bg-inbound);border:1px solid var(--border-color);border-top-left-radius:0}.message-bubble.outbound{align-self:flex-end;background:var(--bg-outbound);border:1px solid rgba(37,99,235,.25);border-top-right-radius:0}.message-sender{font-size:13px;font-weight:600;color:var(--text-accent);margin-bottom:2px}.message-body{font-size:14px;line-height:1.4;white-space:pre-wrap}.message-meta{display:flex;align-items:center;justify-content:flex-end;gap:4px;margin-top:4px}.message-time{font-size:11px;color:var(--text-secondary)}.status-tick{font-size:12px;color:var(--text-secondary)}.status-tick.delivered{color:var(--text-secondary)}.status-tick.read{color:var(--accent)}.status-tick.failed{color:var(--danger)}.media-content{margin-bottom:4px}.media-content img{max-width:100%;border-radius:6px;display:block}.media-content video{max-width:100%;border-radius:6px}.media-content audio{width:100%}.file-download{display:inline-block;padding:8px 14px;background:#2563eb1a;border:1px solid rgba(37,99,235,.3);border-radius:6px;color:var(--text-accent);text-decoration:none;font-size:13px;font-weight:500;transition:background .2s}.file-download:hover{background:#2563eb33}.message-input{display:flex;align-items:flex-end;gap:8px;padding:12px 24px;background:var(--bg-secondary);border-top:1px solid var(--border-color)}.message-input textarea{flex:1;resize:none;padding:10px 14px;border:1px solid var(--border-color);border-radius:6px;background:var(--input-bg);color:var(--text-primary);font-size:14px;font-family:inherit;outline:none;max-height:120px;line-height:1.4;transition:border-color .2s}.message-input textarea:focus{border-color:var(--accent)}.message-input textarea::placeholder{color:var(--text-secondary)}.attach-btn,.send-btn{border:none;border-radius:6px;width:38px;height:38px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:16px;flex-shrink:0;transition:all .2s}.attach-btn{background:var(--input-bg);border:1px solid var(--border-color);color:var(--text-secondary)}.attach-btn:hover{color:var(--text-primary);border-color:var(--text-secondary)}.send-btn{background:var(--accent);color:#fff}.send-btn:hover:not(:disabled){background:var(--accent-hover)}.send-btn:disabled{opacity:.5;cursor:not-allowed}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:3px}