body {
    font-family: sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.event-item {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.event-name {
    font-size: 1.5em;
    margin-bottom: 10px;
    color: #007bff;
}

.event-date,
.event-location,
.event-performers {
    margin-bottom: 5px;
    color: #555;
}

/* スマホ向けのスタイル */
@media (max-width: 600px) {
    body {
        margin: 10px;
    }

    .container {
        padding: 15px;
    }

    .event-name {
        font-size: 1.2em;
    }
}