How do I replace the word "MENU” to a hamburger on mobile

Site URL: https://www.michalbaratzkoren.com/

How can I  Change the menu bar on my mobile, from the word "MENU” to a hamburger ?
Without changing any thing on my desktop site

thank you 

Michal  

13 hours ago, michalov said:

Site URL: https://www.michalbaratzkoren.com/

How can I  Change the menu bar on my mobile, from the word "MENU” to a hamburger ?
Without changing any thing on my desktop site

 

thank you 

Michal  

Add to Design > Custom CSS

#mobileMenuLink a:after {
    content: "";
    background-image: url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQiIGhlaWdodD0iMjQiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgZmlsbC1ydWxlPSJldmVub2RkIiBjbGlwLXJ1bGU9ImV2ZW5vZGQiPjxwYXRoIGQ9Ik0yNCAxOHYxaC0yNHYtMWgyNHptMC02djFoLTI0di0xaDI0em0wLTZ2MWgtMjR2LTFoMjR6IiBmaWxsPSIjMTA0MGUyIi8+PHBhdGggZD0iTTI0IDE5aC0yNHYtMWgyNHYxem0wLTZoLTI0di0xaDI0djF6bTAtNmgtMjR2LTFoMjR2MXoiLz48L3N2Zz4=);
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center center;
    width: 30px;
    height: 30px;
    display: inline-block;
    visibility: visible;
}
#mobileMenuLink a {
    visibility: hidden;
}