html {
    height: 100%;
}
* {
    box-sizing: border-box;
    line-height: 125%;
    margin: 0;
    padding: 0;
}
h1{
    text-align: center;
    color: white;
}
form{
    position: relative;
    display: inline-block;
    padding: 100px;
    color: #03e9f4;
    font-size: 16px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: .5s;
    margin-top: 40px;
    letter-spacing: 4px;
    width: 400px;
    padding: 40px;
    background: rgba(0,0,0,.5);
    box-sizing: border-box;
    box-shadow: 0 15px 25px rgba(0,0,0,.6);
    border-radius: 10px;
    font-family: sans-serif;

}
body{
    margin:0;
    padding:0;
    font-family: sans-serif;
    background: linear-gradient(#141e30, #243b55);
    background-repeat: round;
    padding: 70px 0;
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
input[type="text"] {
    border-radius: 5px;
    border: 1px solid #999999;
    padding: 5px;
    width: 80%;
}
input {
    font-size: 16px;
    font-weight: 400;
}
input[type="submit"]:hover {
    background: #03e9f4;
    color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 5px #03e9f4,
                0 0 25px #03e9f4,
                0 0 50px #03e9f4,
                0 0 100px #03e9f4;
}

input[type="submit"] {
    background-color: #243b55;
    border-radius: 5px;
    border: none;
    color: #ffffff;
    font-weight: 2000;
    padding: 10px;
    width: 100%;
}
.thank{
    color: white;
}