* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background: #f2f4f7;
    font-family: Arial, Helvetica, sans-serif;
    color: #222;
}

.container {
    max-width: 760px;
    margin: 30px auto;
    padding: 0 15px 40px;
}

header {
    background: #ffffff;
    padding: 25px;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 20px;
}

header h1 {
    margin: 0 0 8px;
    font-size: 30px;
}

header h2 {
    margin: 0;
    font-size: 21px;
    font-weight: normal;
}

section {
    background: #ffffff;
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 10px;
}

section h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 21px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: bold;
    margin-bottom: 7px;
}

label span {
    color: #b00020;
}

input[type="text"],
input[type="date"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #bbb;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
}

textarea {
    resize: vertical;
}

.radio-group {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.radio-group label {
    font-weight: normal;
}

.radio-group input,
.checkbox-group input {
    margin-right: 8px;
}

.checkbox-group label {
    font-weight: normal;
}

.explanation {
    line-height: 1.6;
}

.submit-button {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 7px;
    background: #333;
    color: white;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
}

.submit-button:hover {
    opacity: 0.9;
}

.required-note {
    text-align: center;
    color: #666;
    font-size: 14px;
}

.error {
    background: #ffe5e5;
    border: 1px solid #cc0000;
    color: #990000;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 7px;
}

.success {
    text-align: center;
}

.success h3 {
    font-size: 25px;
}

a {
    color: #0056b3;
}

@media (max-width: 600px) {

    .container {
        margin-top: 10px;
    }

    header,
    section {
        padding: 20px;
    }

    header h1 {
        font-size: 25px;
    }

    header h2 {
        font-size: 19px;
    }

    .radio-group {
        display: block;
    }

    .radio-group label {
        margin-bottom: 12px;
    }
}