The basic styles for Twitter example

twitter.css

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

html, body {
    height: 100%;
}

html {
    font-size: 10px;
    font-family: Arial, Helvetica, sans-serif;
    background: #afccdb;
}

h2 {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 2.4rem;
}

p {
    margin-bottom: 2.0rem;
}

body > header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 46px;
    background: #FFF;
    border-bottom: 3px solid rgba(0,0,0,0.05);
}

body > main {
    width: 100%;
    padding: 10px;
    margin-top: 46px;
}

.tile {
    padding: 10px 12px;
    background: #FFF;
}