body {
    background-color: #d3d3d3;
    font-family: Arial, sans-serif;
}

h1 {
    background-color: #8b0000;
    color: white;
    border-radius: 5px;
    margin: 20px auto;
    width: 70%;
    padding: 15px;
    text-align: center;
}

h2 {
    text-align: center;
}

p {
    text-align: center;
}

.card-heading {
    color: red;
}

form {
    margin: 20px auto;
    width: 70%;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
}

label {
    font-weight: bold;
}

input,
select {
    padding: 8px;
    margin-top: 5px;
    border: 1px solid black;
    border-radius: 5px;
}

input[type="number"],
input[type="email"],
input[type="tel"],
select {
    width: 100%;
    box-sizing: border-box;
}

#spl {
    color: red;
    font-weight: bold;
}

.card-options {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.card-options label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-options img {
    width: 100px;
    height: 60px;
    object-fit: contain;
}

.card-number {
    display: flex;
    gap: 10px;
}

.card-number input {
    width: 25%;
    box-sizing: border-box;
}

input[type="submit"] {
    background-color: orange;
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 5px;
    cursor: pointer;
}

.submit-button {
    text-align: center;
}