:root{--primary-color: #3498db;--secondary-color: #2c3e50;--background-color: #f8f9fa;--text-color: #333;--border-color: #ddd;--success-color: #2ecc71;--error-color: #e74c3c}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--background-color);padding:20px}.container{max-width:1200px;margin:0 auto;padding:20px}.header{margin-bottom:30px;text-align:center}.header h1{color:var(--secondary-color);margin-bottom:10px}.card{background:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;padding:20px;margin-bottom:20px}.form-group{margin-bottom:15px}label{display:block;margin-bottom:5px;font-weight:600}select,input,textarea,button{width:100%;padding:10px;border:1px solid var(--border-color);border-radius:4px;font-size:16px}button{background-color:var(--primary-color);color:#fff;border:none;cursor:pointer;font-weight:600;transition:background-color .3s}button:hover{background-color:#2980b9}.button-group{display:flex;gap:10px;margin-top:15px}.button-group button{flex:1}.results{margin-top:30px}.block{background:#fff;border-radius:8px;box-shadow:0 2px 5px #0000001a;padding:15px;margin-bottom:15px}.block-content{white-space:pre-wrap}.response{background-color:#f0f8ff;border-left:4px solid var(--primary-color);padding:15px;margin-top:20px;border-radius:4px}.loading{text-align:center;padding:20px;font-style:italic;color:#666}.error{color:var(--error-color);background-color:#ffebee;padding:10px;border-radius:4px;margin-bottom:15px}