* {box-sizing: border-box;}

#home {
    color: #0000ff;
} 

.headerdiv {
    overflow: hidden;
    padding: 20px 100px;
    overflow: hidden;
    background-color: #222222;
}

.headerdiv a {
    float: left;
    color: white;
    text-align: center;
    padding: 12px;
    text-decoration: none;
    font-size: 18px; 
    line-height: 25px;
    border-radius: 4px;
}

.header-right {
    float: right;
}

.dropdown-header {
    float: left;
    overflow: hidden;
}

.dropdown-header .dropbtn-header {
    font-size: 17px;    
    border: none;
    outline: none;
    color: white;
    padding: 14px 16px;
    background-color: inherit;
    font-family: inherit;
    margin: 0;
}

.dropdown-content-header {
    display: none;
    position: absolute;
    background-color: #333;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 2;
}

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

.dropdown-content-header a:hover {
    background-color: #333;
    color: #0000ff;
}

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