:root{--primary-color: #007bff;--secondary-color: #6c757d;--background-color: #f8f9fa;--surface-color: #ffffff;--text-color: #212529;--border-color: #dee2e6;--error-color: #dc3545}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;margin:0;padding:20px;background-color:var(--background-color);color:var(--text-color);display:flex;justify-content:center;align-items:flex-start;min-height:100vh}#root{width:100%;max-width:500px}.container{background-color:var(--surface-color);padding:2rem;border-radius:8px;box-shadow:0 4px 6px #0000001a;text-align:center}h1{color:var(--primary-color);margin-bottom:2rem}.input-group{margin-bottom:1.5rem;text-align:left}.input-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--secondary-color)}.input-group input{width:100%;padding:.75rem;font-size:1.25rem;border:1px solid var(--border-color);border-radius:4px;box-sizing:border-box;transition:border-color .15s ease-in-out,box-shadow .15s ease-in-out}.input-group input:focus{border-color:var(--primary-color);outline:0;box-shadow:0 0 0 .2rem #007bff40}.rate-info{margin-top:2rem;font-size:1rem;color:var(--secondary-color)}.loader-container,.error-container{display:flex;justify-content:center;align-items:center;padding:2rem;flex-direction:column;text-align:center}.loader{border:4px solid #f3f3f3;border-top:4px solid var(--primary-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error{color:var(--error-color);font-weight:500;max-width:400px}