body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5dc; /* ちくわの色 */
    color: #4b3621; /* ちくわの焦げ目の色 */
    margin: 0;
    padding: 0;
}
header {
    background-color: #d2b48c; /* ちくわの色 */
    padding: 20px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
nav {
    background-color: #4b3621; /* メニューバーの色 */
    padding: 10px;
    display: flex;
    justify-content: center;
    gap: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
nav a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}
nav a:hover {
    text-decoration: underline;
}
main {
    padding: 20px;
}
.content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.record-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
.record-table th, .record-table td {
    border: 1px solid #4b3621;
    padding: 10px;
    text-align: left;
    background-color: #fff0e0; /* ちくわの中の色 */
}
.record-table th {
    background-color: #d2b48c; /* ちくわの色 */
}