*{
    margin: 0; padding: 0;border: 0;box-sizing:border-box; line-height: 1.4;
}

body{
    text-align: center;
    padding: 10px;
    margin: 10px;
    background-color: rgb(28, 200, 165);
    color: black;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

header{
    border-bottom: 2px solid black;
    padding: 8px;
    text-align: center;
}

.mainmenu{
    display: flex;
    flex-flow: row wrap;
    justify-content: space-evenly;
    margin: 24px 0;
    gap: 12px;
    
}

.mainmenu a{
    flex: 0 0 120px;
    aspect-ratio: 1;
    background-color: rgb(12, 39, 215);
    padding: 4px;
    text-decoration: none;
    border: 2px solid black;
    color: black;
    font-size: 20px;
}

.mainmenu a:hover{
    background-color: red;
}

article{
    background-color: yellow;
    margin: 8px;
    padding: 8px;
}

article h2{
    text-align: center;
    margin: 12px;
    


}