style.css

.mainContent {
  background-color: white;
  height: auto;
  width: auto;
  border-radius: 1rem;
}

body {
  background-color: #16db93;
}
.flex {
  height: 90vh;
  width: 100vw;
}
.btno {
  display: inline-block;
  height: 10vh;
  width: 10vw;
  border: none;
  background-color: #048ba8;
  border-radius: 0.5rem;
  margin: 4vh 0%;
  font-weight: 700;
  color: white;
}
.checkbx {
  height: auto;
  width: auto;
  margin-top: -12vh;
  font-size: x-large;
  font-weight: 700;
}
.chkhigh:focus {
  box-shadow: none;
}

@media screen and (max-width: 1200px) {
  .flex {
    height: 90vh;
    width: 100vw;
  }
  body {
    background-color: #16db93;
    /* height: 100vh;
    width: 100vw; */
  }
  .mainContent {
    background-color: #16db93;
    border-radius: 0rem;
    padding-top: 3vh;
  }
  .btno {
    display: inline-block;
    height: 10vh;
    width: 20vw;
    border: none;
    background-color: #048ba8;
    border-radius: 0.5rem;
    margin: none;
  }
  html {
    font-size: 14px;
  }
}