#reg-form {
  display: grid;
  justify-items: stretch;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto;
  grid-template-areas: 
    "email email"
    "username username"
    "password repeat"
    "submit submit";
}
@media only screen and (max-width: 500px) {
  #reg-form {
    display: grid;
    justify-items: center;
    align-items: center;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    grid-template-areas: "email" "username" "password" "repeat" "submit";
  }
  #reg-form > * {
    width: 85vw;
    min-width: 10rem;
  }
  #reg-form .styled-input input {
    margin-left: 0;
    margin-right: 0;
  }
  #reg-form .styled-input {
    margin-bottom: -.4rem;
  }
}
#form-section-email {
  grid-area: email;
}
#form-section-username {
  grid-area: username;
}
#form-section-password {
  grid-area: password;
}
#form-section-repeat {
  grid-area: repeat;
}
#reg-submit-btn {
  grid-area: submit;
}
#reg-form .styled-button {
  margin: .4rem;
}
#login-lnk {
  white-space: nowrap;
}