*{
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}
 
header>h1, header>h2 {
    text-align: center;
    font-family: Courier, monospace;
    padding: 0px 20px;
}
 
header>h1 {
    font-size: 3rem;
}
 
header>h2 {
    font-size: 2rem;
}
 
nav>ul {
    list-style-type: none;
    display: flex;
    flex-direction: column;
 
}
 
nav>ul>li {
    width: 100%;
    text-align: justify;
}
 
nav>ul>li>a{
    background-color: lightgray;
    display: block;
    text-align: center;
    padding: 10px 0px;
    border: black solid 3px;
    border-radius: 18px;
}
 
nav>ul>li>a:active {
    background-color: yellow;
}
img{
    margin: auto;
    display: block;
}
 
main {
    height: 500px;
    background-color: aquamarine;
}
 
main>article {
    margin: 10px 15px;
}
 
main > article > p{
    text-align: justify;
}
 
footer {
    background-color: lightcyan;
}
 
/* Mobil */
@media screen and (max-width: 677px) {
    header{
        background-color: red;
        color: yellow;
    }
    h2{
        color: yellow;
    }
    nav > ul{
        flex-direction: row;
        background-color: red;
    }
    main{
        max-width: 677px;
        margin: auto;
        background-color: red;
    }
    footer{
        margin: auto;
        background-color: yellow;
    }
}
 
@media screen and (min-width: 678px){
    header{
        background-color: red;
        color: yellow;
    }
    h2{
        color: yellow;
    }
    nav > ul{
        flex-direction: row;
        background-color: red;
    }
    main{
        max-width: 1023px;
        margin: auto;
        background-color: red;
    }
    footer{
        margin: auto;
        background-color: yellow;
    }
}
@media screen and (min-width: 1024px){
    header{
        background-color: red;
        color: yellow;
    }
    h2{
        color: yellow;
    }
    nav > ul{
        flex-direction: row;
        background-color: red;
    }
    main{
        max-width: 2000px;
        margin: auto;
        background-color: red;
    }
    footer{
        margin: auto;
        background-color: yellow;
    }
}