@charset "utf-8";
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    height: 100%;
}
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
}
header {
    background: #007BFF;
    color: #fff;
    padding: 15px;
    text-align: center;
}
main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    flex: 1; /* メインコンテンツが伸縮可能に */
}
footer {
    text-align: center;
    padding: 10px;
    background: #333;
    color: #fff;
    margin-top: 20px;
}
.section {
    margin-bottom: 20px;
}
.download-link {
    display: inline-block;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: #28a745;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-size: 16px;
}
.download-link:hover {
    background: #218838;
}
.note {
    color: #dc3545;
    font-weight: bold;
}