:root{--background-color: #f0f2f5;--card-background-color: #ffffff;--primary-color: #007bff;--text-color: #333;--border-color: #dee2e6;--error-color: #dc3545;--success-color: #28a745;--font-family: "Inter", sans-serif;--border-radius: 8px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--background-color);color:var(--text-color);display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.container{width:100%;max-width:600px;background-color:var(--card-background-color);border-radius:var(--border-radius);box-shadow:0 4px 8px #0000001a;padding:24px}h1{text-align:center;margin-bottom:24px;font-size:1.5rem}.form-group{margin-bottom:16px}label{display:block;font-weight:500;margin-bottom:8px}input[type=url]{width:100%;padding:10px 12px;border:1px solid var(--border-color);border-radius:6px;font-family:var(--font-family);font-size:1rem}input[type=url]:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #007bff33}.test-button{width:100%;padding:12px;background-color:var(--primary-color);color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s}.test-button:disabled{background-color:#6c757d;cursor:not-allowed}.results-area{margin-top:24px}h2{font-size:1.25rem;margin-bottom:12px;border-bottom:1px solid var(--border-color);padding-bottom:8px}.status{padding:12px;border-radius:6px;margin-bottom:12px;text-align:center}.status.is-loading{background-color:#e9ecef}.status.is-error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.status.is-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.response-box{background-color:#212529;color:#f8f9fa;padding:16px;border-radius:6px;overflow-x:auto;font-family:monospace;white-space:pre-wrap;word-wrap:break-word}