.dropbtn {
    background-color:#f5f5ef;
    color: darkblue;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #1a1aff;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {background-color: gainsboro}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown:hover .dropbtn {
    background-color: white;
}
#smoot{
    font-family: serif;
    
    
}

.menu{
    border-top-left-radius:  
}


.main{
   border-top-right-radius: 
    
}
    
    <style>
div.container {
    width: 100%;
    border: 1px  red;
}



nav {
    float: left;
    max-width: 160px;
    margin: 0;
    padding: 1em;
}

nav ul {
    list-style-type: none;
    padding: 0;
}
   
nav ul a {
    text-decoration: none;
}

article {
    margin-left: 170px;
    border-left: 1px solid gray;
    padding: 1em;
    overflow: hidden;
}
.boat{
    text-decoration-color: aqua
}
.fun{
    margin: 100px;
    
}