html { font-family: 'Heebo', sans-serif; font-size: 15px; direction: rtl; background-color: #FFFFFF; color: #000; }

.main_title { font-size: 4em; text-align: center; padding: 100px 10px; box-sizing: border-box; }

@media only screen and (max-width : 600px) {
    .main_title {font-size:2em;}
}