* {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}

body {
    background-color: rgb(248, 248, 248);
    margin: 0;
}

img {
    display: inline-block;
}

img.wide {
    width: 100%;
    display: block;
}

.content {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    background-color: rgb(237, 242, 243);
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    padding: 5rem;
    font-family: 'Open Sans', sans-serif;
    min-height: 100%;
}

header {
    padding: 3rem 0;
    margin: -5rem -5rem 3rem -5rem;
    box-shadow: 0 7px 7px -5px rgba(0, 0, 0, 0.2);
    background-color: rgb(207, 227, 231);
}

header>img {
    display: block;
    margin: auto;
}

h1 {
    font-size: 400%;
    font-family: 'Raleway', sans-serif;
}

.row {
    margin-top: 1rem;
}

.row:after {
    content: "";
    display: table;
    clear: both;
}

label>span {
    display: inline-block;
    width: 100px;
}

.amount>span, .amount>div {
    display: table-cell;
}

.amount>input {
    border-bottom-left-radius: 0;
    border-top-left-radius: 0;
    max-width: 10rem;
}

.amount {
    display: table;
}

.units {
    width: 1%;
    padding: 10px;
    display: inline-block;
    text-align: center;
}

input, textarea {
    width: 100%;
    background-color: inherit;
    border-width: 0px;
    border:none;
    border-bottom: 2px solid rgb(173, 220, 229);
}

textarea {
    height: 12rem;
}

::-webkit-input-placeholder {
    font-family: 'Open Sans', sans-serif;
}

::-moz-placeholder {
    font-family: 'Open Sans', sans-serif;
}

:-ms-input-placeholder {
    font-family: 'Open Sans', sans-serif;
}

::placeholder {
    font-family: 'Open Sans', sans-serif;
}

button, input, textarea {
    font-family : inherit;
    font-size   : 100%;
    padding: 10px 0;
    outline: none;
}

button:hover {
    background-color: rgb(35, 189, 219);
}

button {
    padding: 1rem;
    margin-top: 2rem;
    background-color: rgb(192, 227, 235);
    border: 2px solid rgb(173, 220, 229);
    border-radius: 5px;
}

label.error {
    color: red;
    display: inline-block;
    padding-top: 1rem;
}

input.error, textarea.error {
    border-color: red;
}

.center {
    margin: 0 auto;
    display: block;
    max-width: 600px;
    text-align: center;
}

@media only screen and (max-width: 500px) {
    .content {
        padding: 1rem;
        width: 100%;
    }
    h1 {
        font-size: 300%;
        margin: 1rem 0;
    }
    header>img, header>div {
        padding: 2rem 0;
    }
    header {
        padding: 0 0 1rem 0;
        margin: -1rem -1rem 2rem -1rem;
    }
}