a {
    color: rgb(0, 100, 200);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

a:visited {
    color: rgb(0, 80, 160);
}

label {
    display: block;
}

input, button, select, textarea {
    margin: 0 0 0.5em 0;
}

input:disabled {
    color: #ccc;
}

button {
    color: #333;
    background-color: #f4f4f4;
    outline: none;
}

button:disabled {
    color: #999;
}

button:not(:disabled):active {
    background-color: #ddd;
}

button:focus {
    border-color: #666;
}

small {
    font-family: "Helvetica Neue", sans-serif;
    font-size: .9rem;
}

main {
    position: relative;
    background-color: white;
    padding: 2em;
    max-width: 720px;
    margin: 0 auto;
    box-sizing: border-box;
}

.clearfix:after {
    content: '';
    display: table;
    clear: both;
}

img {
    width: 100%;
    height: auto;
    max-width: 640px;
}

header {
    position: relative;
    top: 0;
    text-align: center;
    display: block;
    padding: 5%;
    margin: 0 auto 0;
    transition: all ease .5s;
    background-color: #f39200;
}

section {
    transition: all ease .5s;
}

.btn {
    border-radius: 15px;
    transition: all ease .2s;
    border: 2px solid #fff;
    background-color: #f39200;
}

.btn:hover {
    text-decoration: none;
}