.menu{
    position: fixed;
    left: 0;
    top: 0;
    display:flex;
    flex-flow: column;
    width: 280px;
    height: 100%;
    padding: 0;
    background-color: rgba(100, 20, 20, 1);
}
.menu_items{
    display:flex;
    flex-flow: column;
    margin: 20px;
    
}
.menu_items a{
    margin: 3px;
    color: rgba(255, 255, 255, 1);
    text-decoration: none;
}
/*許可していない入力条件時*/
input:invalid {
	background-color: lightpink;
}

.yoko{display: flex;}

dialog{
    background-color: rgba(200, 200, 200, 1);
    border:solid 10px rgba(0, 0, 0, 1);
    border-radius: 20px;
}

.qr-create{
    background-color: #8d0000;
}