homework-js/js14-change/css/style.css

#nicknameBox, #messageBox  {
    width: 90%;
    height: 50px;
    text-align: center;
    font-size: 20px;
    margin-left: 65px;
    border-radius: 10px;
    border: 1px solid rgb(65, 63, 63);
    background-color: aqua;
    margin-bottom: 10px;
}

#buttonBox {
    width: 70%;
    height: 50px;
    font-size: 20px;
    margin-left: 205px;
    border-radius: 20px;
    border: 1px solid rgb(65, 63, 63);
    background-color: coral;
    color: rgb(65, 63, 63);
    opacity: 0.8;
    cursor: pointer;
}

#buttonBox:hover {
    opacity: 1
}

div {
  background-color: cyan;
  margin-top: 10px;
  border: 1px solid rgb(65, 63, 63);
  border-radius: 10px;
  font-size: 18px;
  color: rgb(65, 63, 63);
  text-align: center;
}