html{
 font-family: 'Montserrat', 'Helvetica', 'Arial', 'Verdana', sans-serif;
 font-size: 14px;
    display: flex;
}
body{
/*border: 1px dotted #ccc;*/
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 100%;
}
header{
    /*border: 1px dotted red;*/

}
.btn{
    text-decoration: none;
    background: rgb(0, 152, 209);
    color: white;
    padding: 1rem 2rem;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.5s;
    text-align: center;
}
.btn:hover {
    background: rgba(0, 152, 209, 0.85);
    color: white;
    transition: all 0.5s;
}
.flex{
    display: flex;
}
.nowrap{
    flex-wrap: nowrap;
}
.items-center{
    align-items: center;
}
.top_bar{
    position: sticky;
    top: 0;
    background: #eee none repeat center center;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}
.top_bar_left{
    color: #000;
    font-size: 13px;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: start;
    flex-grow: 1;
    letter-spacing: 1px;
    padding: 1rem 1.5rem;
    /*max-width: 800px;*/
}
.top_bar_btn{
    display: flex;
    flex-grow: 1;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
}
.logo{
    padding: 1.5rem;
}
main{
    /*border: 1px dotted blue;*/
}
.main_text{
    background-color: #0098d1;
    color: #fff;
    padding: 4rem 2rem;
    font-size: 20px;
    text-align: center;
    margin-top: -3px;
    line-height: 30px;
    letter-spacing: 1px;
}
.catalog{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    background: rgba(0, 0, 0, 0.1);
}
.catalog_item{
    text-decoration: none;
    padding: 1rem;
    text-align: center;
    min-width: 22%;
}

.catalog_item h2{
    font-weight: bold;
    color: #0098d1;
    font-size: 25px;
    overflow: hidden;
    padding: 5px 0 10px;
    text-align: left;
    margin: 0;
}
.catalog_item_border{
    height: 2px;
    background: #fff;
    width: 0;
    transition: all 0.5s;
}
.catalog_item img{
    object-fit: contain;
    transition: all 0.5s;
    max-width: 250px;
}
.catalog_item:hover{
    background: rgba(0, 0, 0, 0.05);
}
.catalog_item:hover .catalog_item_border{
    width: 100%;
    transition: all 0.5s;
}
.catalog_item:hover img{
    margin-left: 1rem;
    transition: all 0.5s;
}
.video{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
footer{
    /*border: 1px dotted green;*/
    display: flex;
    justify-content: center;
    padding: 4rem;
}
footer .btn{
    min-width: 200px;
    font-size: 20px;
}