:root{--bg:#0f1115;--panel:#161922;--panel-border:#262b38;--text:#e6e8ee;--text-dim:#9aa1b2;--accent:#5b8cff;--accent-hover:#7aa2ff;--danger:#e05a5a;--bubble-agent:#1d212c;--bubble-user:#2a4bb0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}a{color:inherit}button{cursor:pointer;font-family:inherit}.auth-page{justify-content:center;align-items:center;min-height:100vh;padding:16px;display:flex}.auth-card{background:var(--panel);border:1px solid var(--panel-border);border-radius:12px;flex-direction:column;gap:16px;width:100%;max-width:380px;padding:32px;display:flex}.auth-card h1{margin:0;font-size:20px}.auth-card .subtitle{color:var(--text-dim);margin:-8px 0 0;font-size:13px}.auth-card label{color:var(--text-dim);flex-direction:column;gap:6px;font-size:13px;display:flex}.auth-card input{border:1px solid var(--panel-border);color:var(--text);background:#0c0e13;border-radius:8px;padding:10px 12px;font-family:inherit;font-size:14px}.auth-card input:focus{border-color:var(--accent);outline:none}.auth-card button[type=submit]{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px 12px;font-size:14px;font-weight:600}.auth-card button[type=submit]:hover:not(:disabled){background:var(--accent-hover)}.auth-card button[type=submit]:disabled{opacity:.6;cursor:default}.auth-switch{text-align:center;color:var(--text-dim);margin:0;font-size:13px}.auth-switch a{color:var(--accent);font-weight:600;text-decoration:none}.error{color:var(--danger);margin:0;font-size:13px}.chat-shell{flex-direction:column;height:100vh;display:flex}.chat-header{border-bottom:1px solid var(--panel-border);background:var(--panel);flex-shrink:0;justify-content:space-between;align-items:center;padding:14px 20px;display:flex}.chat-header h1{margin:0;font-size:15px}.logout-button{border:1px solid var(--panel-border);color:var(--text-dim);background:0 0;border-radius:8px;padding:6px 12px;font-size:13px}.logout-button:hover{border-color:var(--danger);color:var(--danger)}.chat-scroll{flex-direction:column;flex:1;gap:12px;padding:20px;display:flex;overflow-y:auto}.bubble-row{display:flex}.bubble-row.user{justify-content:flex-end}.bubble-row.agent{justify-content:flex-start}.bubble{white-space:pre-wrap;word-wrap:break-word;border-radius:14px;max-width:min(560px,80%);padding:10px 14px;font-size:14px;line-height:1.5}.bubble-row.agent .bubble{background:var(--bubble-agent);border-bottom-left-radius:4px}.bubble-row.user .bubble{background:var(--bubble-user);color:#fff;border-bottom-right-radius:4px}.chat-input-bar{border-top:1px solid var(--panel-border);background:var(--panel);flex-shrink:0;gap:10px;padding:16px 20px;display:flex}.chat-input-bar textarea{resize:none;border:1px solid var(--panel-border);color:var(--text);background:#0c0e13;border-radius:10px;flex:1;max-height:120px;padding:10px 12px;font-family:inherit;font-size:14px}.chat-input-bar textarea:focus{border-color:var(--accent);outline:none}.chat-input-bar button{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:0 20px;font-size:14px;font-weight:600}.chat-input-bar button:hover:not(:disabled){background:var(--accent-hover)}.chat-input-bar button:disabled{opacity:.5;cursor:default}.typing-indicator{color:var(--text-dim);padding:0 20px 8px;font-size:13px}.empty-chat{color:var(--text-dim);text-align:center;margin-top:40px;font-size:14px}