:root{--primary: #6d5efc;--primary-2: #4c8dff;--primary-gradient: linear-gradient(135deg, #8a63ff 0%, #4c8dff 100%);--bg: #f4f5fb;--panel: #ffffff;--panel-alt: #f7f8fc;--border: #e8e9f2;--text: #1c1d29;--text-muted: #8b8fa3;--incoming: #ffffff;--shadow: 0 8px 30px rgba(30, 32, 70, .08);--radius: 16px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}button,input,textarea{font-family:inherit}button{cursor:pointer}a{color:var(--primary)}.brand-logo{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--primary-gradient);color:#fff;font-weight:800;font-size:22px;box-shadow:0 6px 18px #6d5efc59}.brand-logo.small{width:34px;height:34px;border-radius:10px;font-size:17px}.brand-logo.large{width:84px;height:84px;border-radius:26px;font-size:40px}.login-screen{min-height:100%;display:grid;place-items:center;padding:24px;background:radial-gradient(1200px 600px at 10% -10%,rgba(138,99,255,.18),transparent),radial-gradient(1000px 500px at 110% 110%,rgba(76,141,255,.18),transparent),var(--bg)}.login-card{width:100%;max-width:420px;background:var(--panel);border-radius:24px;padding:32px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:18px}.login-brand{display:flex;align-items:center;gap:14px}.login-brand h1{margin:0;font-size:24px}.login-brand p{margin:2px 0 0;color:var(--text-muted);font-size:13px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-muted)}.field input{height:46px;padding:0 14px;border:1.5px solid var(--border);border-radius:12px;font-size:15px;color:var(--text);background:var(--panel-alt);outline:none;transition:border-color .15s,background .15s}.field input:focus{border-color:var(--primary);background:#fff}.checkbox{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-muted);line-height:1.4}.checkbox input{margin-top:2px;accent-color:var(--primary);width:16px;height:16px}.login-error{background:#fdecec;color:#c0392b;border-radius:12px;padding:10px 14px;font-size:13px}.btn-primary{height:48px;border:none;border-radius:12px;background:var(--primary-gradient);color:#fff;font-size:15px;font-weight:600;transition:transform .1s,opacity .15s}.btn-primary:disabled{opacity:.6;cursor:default}.btn-primary:not(:disabled):active{transform:scale(.99)}.btn-ghost{height:42px;padding:0 18px;border:1.5px solid var(--border);border-radius:12px;background:#fff;color:var(--text);font-size:14px;font-weight:500}.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}.login-hint{margin:0;text-align:center;font-size:12px;color:var(--text-muted)}.chat-layout{height:100%;display:grid;grid-template-columns:360px 1fr;max-width:1400px;margin:0 auto;background:var(--panel);box-shadow:var(--shadow)}@media (max-width: 900px){.chat-layout{grid-template-columns:88px 1fr}.sidebar-brand h2,.chat-item-body,.status-text{display:none}}.sidebar{display:flex;flex-direction:column;border-right:1px solid var(--border);background:var(--panel);min-height:0}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 18px}.sidebar-brand{display:flex;align-items:center;gap:10px}.sidebar-brand h2{margin:0;font-size:20px}.icon-button{width:38px;height:38px;border-radius:10px;border:none;background:transparent;font-size:18px;color:var(--text-muted)}.icon-button:hover{background:var(--panel-alt);color:var(--text)}.sidebar-search{display:flex;gap:8px;padding:0 18px 14px}.sidebar-search input{flex:1;height:42px;padding:0 16px;border:none;border-radius:12px;background:var(--panel-alt);font-size:14px;outline:none}.sidebar-search input:focus{background:#eef0f8}.new-chat-button{width:42px;height:42px;border:none;border-radius:12px;background:var(--primary-gradient);color:#fff;font-size:22px;line-height:1;box-shadow:0 6px 14px #6d5efc52}.chat-list{flex:1;overflow-y:auto;padding:0 8px 8px}.chat-item{width:100%;display:flex;align-items:center;gap:12px;padding:10px;border:none;border-radius:14px;background:transparent;text-align:left;color:inherit}.chat-item:hover{background:var(--panel-alt)}.chat-item.active{background:linear-gradient(135deg,#8a63ff1f,#4c8dff1f)}.chat-item-body{flex:1;min-width:0}.chat-item-top{display:flex;align-items:baseline;justify-content:space-between;gap:8px}.chat-item-name{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-item-time{font-size:12px;color:var(--text-muted);flex-shrink:0}.chat-item-preview{font-size:13px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.empty-list{padding:40px 16px;text-align:center;color:var(--text-muted);display:flex;flex-direction:column;gap:12px;align-items:center}.empty-list p{margin:0}.avatar{flex-shrink:0;display:grid;place-items:center;border-radius:50%;color:#fff;font-weight:700;letter-spacing:.5px}.sidebar-footer{display:flex;align-items:center;gap:10px;padding:12px 18px;border-top:1px solid var(--border);font-size:13px}.status-dot{width:9px;height:9px;border-radius:50%;background:var(--text-muted);flex-shrink:0}.status-online .status-dot{background:#2ecc71;box-shadow:0 0 0 4px #2ecc7129}.status-connecting .status-dot{background:#f0ad4e}.status-error .status-dot{background:#e74c3c;box-shadow:0 0 0 4px #e74c3c29}.status-text{display:flex;flex-direction:column;min-width:0}.status-text 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26px;display:flex;flex-direction:column;gap:6px}.messages-empty{margin:auto;color:var(--text-muted);font-size:14px}.bubble-row{display:flex}.bubble-row.out{justify-content:flex-end}.bubble-row.in{justify-content:flex-start}.bubble{max-width:min(560px,76%);padding:8px 12px 6px;border-radius:16px;font-size:15px;line-height:1.4;display:flex;align-items:flex-end;gap:8px;word-break:break-word;box-shadow:0 1px 2px #1e20460f}.bubble-row.in .bubble{background:var(--incoming);border-bottom-left-radius:6px}.bubble-row.out .bubble{background:var(--primary-gradient);color:#fff;border-bottom-right-radius:6px}.bubble-text{white-space:pre-wrap}.bubble-meta{font-size:11px;opacity:.7;flex-shrink:0;display:inline-flex;align-items:center;gap:3px;transform:translateY(2px)}.msg-status.error{color:#ffd0d0}.composer{display:flex;align-items:flex-end;gap:10px;padding:14px 22px 18px;background:var(--panel);border-top:1px solid var(--border)}.composer textarea{flex:1;resize:none;max-height:140px;min-height:46px;padding:12px 16px;border:1.5px solid var(--border);border-radius:14px;background:var(--panel-alt);font-size:15px;line-height:1.4;outline:none}.composer textarea:focus{border-color:var(--primary);background:#fff}.send-button{width:46px;height:46px;border:none;border-radius:14px;background:var(--primary-gradient);color:#fff;font-size:18px;flex-shrink:0;box-shadow:0 6px 14px #6d5efc52}.send-button:disabled{opacity:.5;cursor:default;box-shadow:none}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#14162873;display:grid;place-items:center;padding:20px;z-index:50}.modal{width:100%;max-width:400px;background:var(--panel);border-radius:20px;padding:26px;display:flex;flex-direction:column;gap:16px;box-shadow:var(--shadow)}.modal h2{margin:0;font-size:20px}.modal-subtitle{margin:-8px 0 0;font-size:13px;color:var(--text-muted)}.modal-actions{display:flex;justify-content:flex-end;gap:10px}.modal-actions .btn-primary{height:42px;padding:0 22px}