@media (min-width: 901px) {
  .bottom-part {background:rgba(0,0,0,.4);border-radius: 5px;}
}
section.intro .intro-main {background: rgba(0,0,0,.4);border-radius: 5px;padding: 10px;} 
section.intro .intro-head {background: rgba(0,0,0,.4);border-radius: 5px;padding: 10px;}
header .block-logo .mobile-logo {width: 180px;}
header .block-logo .desktop-logo {max-width: 200px;}
header .btn-menu.btn-slide:not(.open){padding: 8px 8px 0;margin: 8px 0 15px;background-color: rgba(0,0,0,0.5);border: 2px solid #fff}
header .btn-menu.btn-slide:not(.open):hover{background-color: rgba(0,0,0,1)}
header .btn-menu #burger span{height:2px}
h1, h2.heading-1 {font-size: 25px}