.otp-input {
    width: 45px;
    height: 50px;
    text-align: center;
    font-size: 1.5rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
}

.otp-input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}