*{
    box-sizing: border-box;
}
body{
    background-color: #3498DB;
    font-family: "Arial", sans-serif;
    padding: 50px;
    /*padding: 15px;*/
    text-align: center;
}
.container{
    margin: 20px auto;
    padding: 10px;
    width: 300px;
    background-color: #fff;
    border-radius: 5px;
}
h1{
    width: 90%;
    color: #777;
    font-size: 32px;
    margin: 28px auto;
    margin-bottom: 20px;
    text-align: center;
    /*padding-top: 40px;*/
}
.input{
    padding: 12px 0;
    margin-bottom: 10px;
    border-radius: 3px;
    border: 2px solid transparent;
    text-align: center;
    width: 90%;
    font-size: 16px;
    transition: border .2s, background-color .2s;
}
.field{
    background-color: #ECF0F1;
}
.field:focus {
    border: 2px solid #3498DB;
}
.field.success {
    background-color: #ACDF87;
    color: black;
}
.btn{
    background-color: #3498DB;
    color: #fff;
    line-height: 25px;
    cursor: pointer;
}
.btn:hover,
.btn:active {
    background-color: #1F78B4;
    border: 2px solid #1F78B4;
}