body {
    margin: 0;
    background: url("https://c1.wallpaperflare.com/preview/86/468/54/student-people-latin-school.jpg");
    background-size: cover;
}
* {
    box-sizing: border-box;
}
.signup {
    color: cornflowerblue;
}
.wrapper {
    display: flex;
    flex-direction: column;
    width: 60%;
    margin-left: 30%;
    margin-right: 30%;
}
.wrapper input {
    border-radius: 15px;
    padding: 10px;
    border: none;
    background: rgb(213, 215, 219);
    color: black;
    width: 60%;
    margin-bottom: 2%;
}
b {
    color: chocolate;
}
.button {
    color: black;
    text-decoration: none;
    background: brown;
    border-radius: 15px;
    text-align: center;
    font-size: 20px;
    width: 45%;
    margin-left: 6%;
}
@media screen and (max-width: 767px){
    *{
        box-sizing: border-box;
    }
    .signup {
    color: cornflowerblue;
}
.wrapper {
    display: flex;
    flex-direction: column;
    margin: 0;
    width: 100%;
 } 
.wrapper input { 
    border-radius: 15px;
    padding: 10px;
    border: none;
    background: rgb(213, 215, 219);
    color: black;
    margin-bottom: 3%;
    width: 100%;
}
b {
    color: chocolate;
}
.button {
    padding: 10px;
    color: black;
    text-decoration: none;
    background: brown;
    border-radius: 15px;
    text-align: center;
    font-size: 20px;
    width: 80%;
    
  }
}