body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f3a9c2; /* 背景色を黒に設定 */
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.logo {
    width: 30%;
    height: auto;
    opacity: 0;
    animation: fadeIn 2s forwards;
}

/* スマホサイズ用のメディアクエリ */
@media (max-width: 768px) {
    .logo {
        width: 60%;
    }
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}