*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f5f5f5}#app{min-height:100vh}.demo-selector{background:#fff;padding:20px;box-shadow:0 2px 4px #0000001a;text-align:center}.demo-selector h1{margin-bottom:20px;color:#333}.button-group{display:flex;gap:10px;justify-content:center}.button-group button{padding:12px 24px;background:#fff;border:2px solid #667eea;color:#667eea;border-radius:6px;cursor:pointer;font-size:16px;font-weight:600;transition:all .3s}.button-group button:hover{background:#667eea;color:#fff}.button-group button.active{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-color:#667eea}.fullscreen-container{position:fixed;inset:0;z-index:1000;background:#fff}.agent-container{max-width:100%;height:calc(100vh - 100px)}.login-form{max-width:400px;margin:50px auto;padding:40px;background:#fff;border-radius:12px;box-shadow:0 4px 12px #0000001a}.login-form h2{margin-bottom:30px;text-align:center;color:#333}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:600;color:#333}.form-group input{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:6px;font-size:14px}.form-group input:focus{outline:none;border-color:#667eea}.login-form button{width:100%;padding:14px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:600;cursor:pointer}.login-form button:hover{opacity:.9}.login-form button:disabled{opacity:.6;cursor:not-allowed}.error{margin-top:15px;padding:12px;background:#ffebee;color:#c62828;border-radius:6px;font-size:14px}