.wrapper {
    width: 300px;
    height: 70px;
    margin: 0 auto;
}

.field {
    font: 95% Arial, Helvetica, sans-serif;
    max-width: 300px;
    margin: 10px auto;
    padding: 16px;
    background: #f7f7f7;
    text-align: center;
}

.field h1 {
    background: #f7f7f7;
    padding: 20px 0px 0px 0px;
    font-size: 140%;
    font-weight: bold;
    text-align: center;
    color: #3da4ff;
    margin: -16px -16px 16px -16px;
}

.field input[type="text"] {
    -webkit-transition: all 0.30s ease-in-out;
    -moz-transition: all 0.30s ease-in-out;
    -ms-transition: all 0.30s ease-in-out;
    -o-transition: all 0.30s ease-in-out;
    outline: none;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    width: 100%;
    background: #fff;
    margin-bottom: 4%;
    border: 1px solid #ccc;
    padding: 3%;
    color: #555;
    font: 95% Arial, Helvetica, sans-serif;
    text-align: center;
    height: 100px;
    font-size: 45px;
}

.field input[type="text"]:focus {
    box-shadow: 0 0 5px #3da4ff;
    padding: 3%;
    border: 1px solid #3da4ff;
    text-align: center;
}

#check {
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    width: 100%;
    padding: 3%;
    background: #3da4ff;
    border-bottom: 0px solid #3da4ff;
    border-top-style: none;
    border-right-style: none;
    border-left-style: none;
    color: #fff;
    text-align: center;
    font-weight: bold;
}

#check:hover {
    cursor: pointer;
    background: #ddd;
    text-align: center;
    font-weight: bold;
    color: #3da4ff;
}