body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
}

.sns-list {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    padding: 2rem;
}

.sns-icon-link {
    position: relative;
    display: inline-block;
}

.sns-icon-link img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.sns-icon-link:hover img {
    transform: scale(1.1);
}

/* レスポンシブなスタイル */
@media screen and (max-width: 600px) {
    .sns-list a img {
        width: 70px;
        height: 70px;
    }
}
/* 以前のCSSスタイルはこちらに記述 */

.rotate-animation {
    animation: rotate 2s ease-in-out;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(90deg); }
    50% { transform: rotate(180deg); }
    75% { transform: rotate(270deg); }
    100% { transform: rotate(360deg); }
}