body {
    background-color: #f1f8e9;
}

a:link {
    color: #77ae37;
}

a:visited {
    color: #77ae37;
}

a:hover {
    color: #90c851;
}

a:active {
    color: #90c851;
}

.center-text {
    text-align: center;
}

.center-img {
    display: block;
    margin: auto;
}

.content {
    margin: 0 auto;
    width: 70%;
    box-sizing: border-box;
}

@media (max-width: 700px) {
    .content {
        width: 100%;
        padding: 0 16px;
    }
}