body{
    background-color: #355EFC;
}
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    color: #dfe4fd;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0; /* Сначала скрываем кнопку */
    transition: opacity 0.3s ease-in-out;
    background-image: url('../images/992703.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
  }
.show {
    opacity: 1;
  }
header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #dfe4fd;
    border-radius: 10px;
}
.language{
    width: 100%;
    height: 30px;
    background-color: #355EFC;
    display: flex;
    justify-content: flex-end;
}
.language img{
    text-align: right;
    height: 20px;
    margin:5px 20px 0px 10px;
}
.logo_img{
    display: flex;
    height: 170px;
    margin-right: 100px;
    margin-left: 50px;
}
.title{
    display: flex;
}
.text_head{
    display: flex;
    flex-direction: column;
    margin: 40px 0 0 0;
    font-size: 36px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}
.text_head a{
    text-decoration: none;
    color: black;
}
p{
    margin: 0;
}
.structure{
    margin: 30px 100px 80px 100px;
    
}
h1{
    text-align: center;
    background-color: #dfe4fd;
    border-radius: 20px;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    padding: 20px;
    font-weight: 100;
}
.management{
    margin-bottom: 70px;
}
.researcher{
    display: flex;
    margin-left: 90px;
    margin-bottom: 30px;
}
.text_res{
    display: flex;
    flex-direction: column;
    background-color: #dfe4fd;
    /* background: linear-gradient(90deg, rgb(240, 248, 255), rgb(223, 228, 253)); */
    width: 900px;
    border-radius: 20px;
    padding-left: 15px;
    padding-right: 15px;
    box-shadow: 3px 3px 5px rgba(0, 0, 0, 0.3);
}
.researcher img{
    height: 300px;  
}
.icon img{
    height: 50px;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin: 30px 30px 20px 30px;
}
.id_img{
    margin-right: 60px;
    border-radius: 15px;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}
.name{
    font-size: 30px;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin-top: 15px;
    margin-bottom: 15px;
}
.job_title{
    font-size: 24px;
}
.p_info{
    font-size: 24px;
    margin-bottom: 30px;
    text-align: justify;
}
.labs_title{
    margin: 30px 100px 40px 100px;
}
.labs_title a{
    text-decoration: none;
}
h2{
    background-color: #dfe4fd;
    border-radius: 10px;
    text-align: center;
    font-size: 36px;
    padding: 20px;
    color: black;
    font-weight: 100;
}
.laboratories{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.row_lab{
    display: flex;
    text-align: center;
    margin-left: 100px;
}
.lab{
    display: flex;
    background-color: #dfe4fd;
    border-radius: 10px;
    width: 370px;
    height: 100px;
    margin: 30px;
    
}
.lab p{
    margin: 15px;
    text-align: center;
    font-size: 26px;
}
.lab a{
    text-decoration: none;
}
footer{
    background-color: blue;
    height: 170px;
    display: flex;
    justify-content:flex-end;
}
.footer{
    margin-top: 50px;
    margin-right: 200px;
    text-align: right;
}

@media (max-width: 768px) {
    .logo_img{
        display: flex;
        height: 100px;
        margin: 0 auto;
    }
    .text_head {
        font-size: 20px;
        width: 90%; 
        text-align: center;
    }
    .title {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .structure {
        width: 90%; 
        text-align: center;  
        margin: 10px;
    }
    h1{
        font-size: 24px;
    }
    h2{
        font-size: 22px;
    }
    .researcher {
      flex-direction: column;
      align-items: center;
      margin-left: 0;
    }
    .id_img{
        height: 10px;
    }
    .text_res {
      width: 90%;
      padding: 10px;
    }
    .text_res p {
        font-size: 20px;
    }
    .id_img { 
        margin: 0 auto;
    }
    .icon {
        text-align: center;
    }
    .icon img {
        width: 40px;
        height: auto;
        margin: 5px;
    }
    .row_lab {
      flex-direction: column;
      align-items: center;
      margin-left: 0;
    }
    .labs_title{
        font-size: 20px;
        width: 90%; 
        text-align: center;
        margin: 0 auto; 
    }
    .lab {
      width: 90%;
      height: auto;
      text-align: center;
    }
  
    .footer {
      margin-right: 20px;
      text-align: center;
    }
  }