html{
    font-family: "Arial", serif;
    font-size: 20px;
    /*display: flex;*/
    /*justify-content: center;*/
}
body{
    width: 100%;
    height: 100%;
    /*max-width: 1300px;*/
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    /*border: 1px dotted #ccc;*/
    padding: 1rem;
    background: url("img/Фон.webp");
    background-repeat: no-repeat;
    background-position: bottom;
    /*background-color: white;*/
    /*background-blend-mode: hard-light;*/
    background-size: contain;
}
.btn-primary{
    background: #004C99;
    color: #fff;
    padding: 10px;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
    transition: all 0.2s;
}
.btn-primary:hover{
    background: #024181;
    font-size: 21px;
    transition: all 0.2s;
}
.btn-primary:active{
    background: #022a52;
    transition: all 0.2s;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    /*border: 1px dashed red;*/
}
header img {
    max-width: 120px;
    object-fit: contain;
}
main{
    padding-top: 2rem;
}
#about, #catalog{
    color: #004C99;
    text-shadow: 1px 1px 1px white;
}
#youtube{
    margin: 4rem 0;
    text-align: center;
}
.row{
    display: flex;
    margin-bottom: 2rem;
}
#catalog img{
    max-width: 300px;
    object-fit: contain;
}
#catalog .item_text{
    padding: 0 3rem;
    background: #ffffffb8;
    border-radius: 10px;
    margin-left: 3rem;
}
footer{
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}
footer .btn-primary{
    min-width: 200px;
}