* {
    margin: 0;
    padding: 0;
}

.top-container {
    background-color: #f1f1f1;
    padding: 30px;
    text-align: center;
}

.header {
    padding: 30px;
    background: #99f;
    color: #f1f1f1;
}

.content {
    width: 70%;
    margin: 0 auto;
    padding: 16px;
}

section {
    padding: 30px 0;
    border-bottom: 1px solid #eee;
}

p {
    line-height: 2em;
}

.sticky {
    position: fixed;
    top: 0;
    width: 100%;
}

.sticky+.content {
    padding-top: 102px;
}