.container_mask{
  margin: 0;
  padding: 0;
  font-family: 'Roboto', sans-serif;
  width: 100%;
  height: 100vh;
  background-image: linear-gradient(rgba(0,0,0,0.5),rgba(0,0,0,0.5)),url("http://sch153.minsk.edu.by/ru/sm_full.aspx?guid=153503");
  background-position: center;
  background-size: cover;
  padding-left: 8%;
  padding-right: 8%;
  box-sizing: border-box;
}

.container_mask .row{
  display: flex;
  height: 88%;
  align-items: center;
}

.container_mask .row .col{
  flex-basis: 50%;
}


.container_mask .row .col h1{
  color: #fff;
  font-size: 100px;
}

.container_mask .row .col p{
    color: #fff;
    font-size: 32px;
    line-height: 32px;
}
.container_mask .row .col .a{
  text-decoration: none;
}

.container_mask .row .col button{
  width: 180px;
  color: #000;
  font-size: 12px;
  padding: 12px 0;
  background: #fff;
  border: 0;
  border-radius: 20px;
  outline: none;
  margin-top: 30px;
}

.container_mask .row .col .card1{
  width: 250px;
  height: 280px;
  display: inline-block;
  border-radius: 10px;
  padding: 15px 25px;
  box-sizing: border-box;
  cursor: pointer;
  margin: 10px 15px;
  background-image: url("http://sch153.minsk.edu.by/ru/sm_full.aspx?guid=153563");
  background-position: center;
  background-size: cover;
position: relative;
}

.container_mask .row .col .card1 .linka1{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}

.container_mask .row .col .card2{
  width: 250px;
  height: 280px;
  display: inline-block;
  border-radius: 10px;
  padding: 15px 25px;
  box-sizing: border-box;
  cursor: pointer;
  margin: 10px 15px;
  background-image: url("http://sch153.minsk.edu.by/ru/sm_full.aspx?guid=153583");
  background-position: center;
  background-size: cover;
  position: relative;
}

.container_mask .row .col .card2 .linka2{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}



.container_mask .row .col .card3{
  width: 250px;
  height: 280px;
  display: inline-block;
  border-radius: 10px;
  padding: 15px 25px;
  box-sizing: border-box;
  cursor: pointer;
  margin: 10px 15px;
  background-image: url("http://sch153.minsk.edu.by/ru/sm_full.aspx?guid=153593");
  background-position: center;
  background-size: cover;
  position: relative;
}

.container_mask .row .col .card3 .linka3{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}


.container_mask .row .col .card4{
  width: 250px;
  height: 280px;
  display: inline-block;
  border-radius: 10px;
  padding: 15px 25px;
  box-sizing: border-box;
  cursor: pointer;
  margin: 10px 15px;
  background-image: url("http://sch153.minsk.edu.by/ru/sm_full.aspx?guid=157273");
  background-position: center;
  background-size: cover;
  position: relative;
}

.container_mask .row .col .card4 .linka4{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}