body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.form-container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px; /* Max width for a simpler layout */
    box-sizing: border-box;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 25px;
    font-size: 2em;
}

fieldset {
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-bottom: 20px;
    padding: 15px;
}

legend {
    font-size: 1.2em;
    font-weight: bold;
    color: #555;
    padding: 0 5px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="month"],
.form-group select,
.form-group textarea {
    width: calc(100% - 18px); /* Adjust for padding/border */
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1em;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.2);
}

.form-group small {
    display: block;
    margin-top: 3px;
    font-size: 0.85em;
    color: #777;
}

.checkbox-group, .radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.checkbox-group input[type="checkbox"],
.radio-group input[type="radio"] {
    margin-right: 5px;
}

.checkbox-group label,
.radio-group label {
    font-weight: normal;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    margin-bottom: 0; /* Override default label margin */
}

.button-group {
    text-align: center;
    margin-top: 30px;
}

button {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    margin: 0 5px;
    transition: background-color 0.2s;
}

button[type="reset"] {
    background-color: #6c757d;
}

button:hover {
    background-color: #0056b3;
}

button[type="reset"]:hover {
    background-color: #5a6268;
}

.error-message {
    color: #dc3545;
    font-size: 0.8em;
    margin-top: 3px;
    min-height: 18px; /* Maintain space */
}

/* Validation styling */
input.input-error,
select.input-error,
textarea.input-error {
    border-color: #dc3545;
}

.payment-details {
    margin-top: 15px;
    padding: 10px;
    border: 1px dashed #b8daff;
    border-radius: 5px;
    background-color: #e6f7ff;
}

.split-fields {
    display: flex;
    gap: 15px;
}

.split-fields > div {
    flex: 1;
}

@media (max-width: 480px) {
    .form-container {
        padding: 20px;
    }
    h1 {
        font-size: 1.5em;
    }
    .split-fields {
        flex-direction: column;
        gap: 0;
    }
    .button-group button {
        width: 100%;
        margin-bottom: 10px;
    }
}