body {
    background: #aed72a;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: sans-serif;
    color: #0f453c
}

html, body {
    height: 100%;
    padding: 0;
    margin: 0;
    box-sizing: content-box;
}

a {
    color: #009554;
    transition: 0.3s all;
}

a:hover {
    color: #0f453c;

}