:root{--bg: #0b0e14;--bg-elev: #12161f;--bg-panel: #171c27;--border: #232a38;--text: #e6e9ef;--text-dim: #8b93a5;--accent: #4f8cff;--accent-hover: #6ba1ff;--ok: #3ecf8e;--warn: #f0b429;--err: #ef4444}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.5}.app{display:flex;flex-direction:column;height:100vh;max-width:960px;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--bg-elev)}.brand{display:flex;align-items:center;gap:10px}.logo{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#4f8cff,#7c5cff);color:#fff;font-weight:700;font-size:12px}.title{font-weight:650;font-size:16px}.topbar-right{display:flex;align-items:center;gap:10px}.provider-badge{display:inline-flex;align-items:center;gap:7px;background:var(--bg-panel);border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:999px;cursor:pointer;font-size:13px}.provider-badge:hover{border-color:var(--accent)}.dot{width:8px;height:8px;border-radius:50%;display:inline-block}.icon-btn{background:var(--bg-panel);border:1px solid var(--border);color:var(--text);width:34px;height:34px;border-radius:8px;cursor:pointer;font-size:15px}.icon-btn:hover{border-color:var(--accent)}.banner{padding:10px 20px;font-size:13px}.banner.error{background:#ef44441f;color:#fca5a5;border-bottom:1px solid rgba(239,68,68,.3)}.chat-feed{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.empty-state{margin:auto;text-align:center;color:var(--text-dim);max-width:420px}.empty-logo{width:56px;height:56px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:linear-gradient(135deg,#4f8cff,#7c5cff);color:#fff;font-weight:700;font-size:20px}.empty-state h2{color:var(--text);margin:0 0 8px;font-size:20px}.empty-state p{margin:0}.msg{display:flex;flex-direction:column;gap:4px}.msg.user{align-items:flex-end}.msg.assistant{align-items:flex-start}.msg-label{font-size:11px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em}.msg-bubble{max-width:80%;padding:12px 16px;border-radius:12px;background:var(--bg-panel);border:1px solid var(--border)}.msg.user .msg-bubble{background:var(--accent);border-color:var(--accent);color:#fff}.msg-content{white-space:pre-wrap;word-break:break-word;margin:0}.thinking{display:flex;align-items:center;gap:8px;color:var(--text-dim)}.progress{color:var(--text-dim);font-style:italic}.stream-indicator{display:inline-flex;align-items:center;gap:6px;margin-top:8px;font-size:12px;color:var(--text-dim)}.spinner{width:12px;height:12px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;display:inline-block;flex:none}@keyframes spin{to{transform:rotate(360deg)}}.status{margin-top:8px;font-size:12px;font-weight:600}.status.ok{color:var(--ok)}.status.err{color:var(--err)}.status.warn{color:var(--warn)}.input-bar{display:flex;gap:10px;padding:14px 20px;border-top:1px solid var(--border);background:var(--bg-elev)}.input-bar textarea{flex:1;resize:none;background:var(--bg-panel);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:10px 14px;font-family:inherit;font-size:14px;outline:none}.input-bar textarea:focus{border-color:var(--accent)}.send-btn{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:0 22px;font-weight:600;cursor:pointer;font-size:14px}.send-btn:hover:not(:disabled){background:var(--accent-hover)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;width:440px;max-width:92vw;box-shadow:0 20px 60px #00000080}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-header h3{margin:0;font-size:16px}.modal-body{padding:20px;display:flex;flex-direction:column;gap:16px}.modal-body label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-dim)}.modal-body select{background:var(--bg-panel);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:9px 12px;font-size:14px;outline:none}.modal-body select:focus{border-color:var(--accent)}.active-info{font-size:13px;color:var(--text-dim)}.ok-text{color:var(--ok)}.warn-text{color:var(--warn)}.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 20px;border-top:1px solid var(--border)}.btn{padding:9px 16px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;border:1px solid transparent}.btn.secondary{background:var(--bg-panel);border-color:var(--border);color:var(--text)}.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover:not(:disabled){background:var(--accent-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}