.header{
    width: 100%;
    height: 60px;
    background-color: darkcyan;
}

.header-main{
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;

    position: relative;
}

.header-logo{
    float: left;
    height: 100%;
    
}

.header-logo img{
    height: 100%;
    padding: 8px;
    box-sizing: border-box;
}

ul.header-menu{

    float: left;

    margin: 0;
    padding: 0 16px;

    list-style: none;

    height: 100%;
}

ul.header-menu li{
    float: left;
    
    transition: background-color 0.3s;
}

ul.header-menu li:hover{
    background-color: lightseagreen;
}


ul.header-menu li a{
    display: inline-block;
    height: 100%;
    
    padding-left: 16px;
    padding-right: 16px;
    line-height: 60px;
    color: white;
    text-decoration: none;
}

.header-menu-toggle{

    display: none;

    float: right;
    height: 100%;

    position: relative;

    padding: 0 16px;

    color: white;

    font-size: 32px;
}


input#header-menu-toggle{
    position: absolute;
    top: 0;
    left: 0;
    visibility: hidden;
}

.header-menu-toggle span{
    line-height: 60px;

    transform: rotate(0deg);

    transition: transform 0.3s;
}

input#header-menu-toggle:checked + .header-menu-toggle span{
    transform: rotate(90deg);
}

@media screen and (max-width: 600px){

    ul.header-menu{
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: darkcyan;
        height: auto;
        padding: 0;
        margin: 0;

        max-height: 0;
        overflow: hidden;

        transition: max-height 0.3s;

    }

    ul.header-menu li{
        float: none;
    }
    ul.header-menu li a{
        text-align: center;
        width: 100%;
    }

    input#header-menu-toggle:checked ~ ul.header-menu{
        max-height: 500px;

    }

    .header-menu-toggle{
        display: inherit;
    }

}