* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #2c3e50;
    text-align: center;
}

p {
    margin-bottom: 20px;
}

.form-section {
    margin-bottom: 30px;
}

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

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="email"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

#submitBtn {
    width: 100%;
}

.notice {
    margin-top: 30px;
    padding: 15px;
    background-color: #f8f9fa;
    border-left: 4px solid #3498db;
    border-radius: 4px;
}

.notice h3 {
    font-size: 16px;
    margin-bottom: 10px;
}

.notice ul {
    padding-left: 20px;
}

.important-notice {
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 15px;
    background-color: #f8f8f8;
    border: 1px solid #e0e0e0;
    border-left: 4px solid #e74c3c;
    border-radius: 4px;
}

.important-notice h3 {
    color: #e74c3c;
    font-size: 16px;
    margin-bottom: 10px;
}

.important-notice ul {
    padding-left: 20px;
}

.important-notice ul ul {
    margin-top: 5px;
    margin-bottom: 10px;
}

.important-notice li {
    margin-bottom: 5px;
}

strong {
    font-weight: bold;
    color: #e74c3c;
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .container {
        margin: 20px;
        padding: 20px;
    }
}