/* ヘッダーのスタイル設定 */
header {

    -webkit-user-select: none;  /* Chrome, Safari, Opera */
    -moz-user-select: none;     /* Firefox */
    -ms-user-select: none;      /* Internet Explorer/Edge */
    user-select: none;          /* Non-prefixed version, currently supported by Chrome, Edge, Opera and Firefox */

}

/* サイドバーのスタイル設定 */
.sidebar {

    -webkit-user-select: none;  /* Chrome, Safari, Opera */
    -moz-user-select: none;     /* Firefox */
    -ms-user-select: none;      /* Internet Explorer/Edge */
    user-select: none;          /* Non-prefixed version, currently supported by Chrome, Edge, Opera and Firefox */

}