html {
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

body {
    background: #fff;
    color: #545454;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    margin: 0 auto;
    max-width: 800px;
    padding: 2em 2em 4em;
}


h1, h2, h3, h4, h5, h6 {
    color: #222;
    font-weight: 600;
    line-height: 1.3;
}
h1 {
    font-size: 30px;    
}


h2 {
    margin-top: 1.3em;
    margin-bottom: .5em;
}

h3 {
    color: gray;
    display: inline;
}

a {
    color: green;
}

b, strong {
    font-weight: 700;
    color: black;
}

hr {
    margin-top: 1.5em;
    margin-bottom: 0.7em;
    outline-color: red;
}


samp {
    display: none;
}

img {
    animation: colorize 2s cubic-bezier(0, 0, .78, .36) 1;
    background: transparent;
    display: block;
    margin: 1.3em auto;
    max-width: 100%;
}

@keyframes colorize {
    0% {
        -webkit-filter: grayscale(100%);
        filter: grayscale(100%);
    }
    100% {
        -webkit-filter: grayscale(0%);
        filter: grayscale(0%);
    }
}