body{ 
    margin:0;
    font-size:16px;
    font-family:Verdana,sans-serif;
    color:#333;
    line-height: 1.8;
}

header{
    background:#00bdab;
    color:#fff;
    text-align: center;
    padding-top:64px;
}
h1{
    font-size:24px;
}

h2{
    font-size:20px;
    text-align:center;
    background-color:#fee;
}

h3{
    font-size:20px;
    margin:10px 2em;
    text-align:center;
    clear: both;
    background-color: #00bdab;
    color:#fff;
}


audio{
    display:block
}

.btn{
    text-decoration:none;
    background: #e9862a;
    color:#fff;
    display:block;
    width: 80px;
    line-height: 26px;
    margin: 4px 4px;
    padding:1px;
    font-weight:bold;
    border-radius: 4px;
    text-align: center;
    float:left;
}

.btn:hover{
    opacity:0.9;
}

.main-container{
    margin: 0 32px;
}

.work{
    background: #fee;
} */

.container{
    width:800px;
}
.container section{
    text-align:center;
    width:280px;
    height:140px;
    background-color: rgb(75, 194, 138);
    margin:auto;
    margin-bottom:30px;
    
}


@media (min-width:900px){

    .container{
        display:flex;
        justify-content: space-between;
    }

}