style.css

@font-face {
  font-family: 'GmarketSans';
  src: local('GmarketSans'), url('font/gmarketsansttfmedium.woff') format('woff'), url('font/GmarketSansTTFMedium.ttf') format('truetype');
}

body {
  margin: 0;
  padding: 0;
  font-family: 'GmarketSans';
  background-image: url('img/background.png');
  background-size: cover;
  background-position: center;
}

form {
  text-align: center;
  display: flex;
  justify-content: center;  
  border: 9px;
  border-color: black;
  
}

label {
  font-size: 20px;
  color: cornflowerblue;
  border-radius: 8%;
}

h1 {
  font-size: 30px;
  color: orchid;
  text-align: center;
}

fieldset {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  max-width: 90%;
  padding: 20px;

  background-color: rgba(255, 255, 255, 0.8);
}

.img {
  background-attachment: fixed;
  height: 100vh;
  background-image: url('img/background.png');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 90%;
}

.login-main .login {
  left: 20%;
  transform: translateX(-20%);
  opacity: 0;
  transition: all 0.6s ease-out;
  z-index: 0;
}

.login-main:hover .login {
  opacity: 1;
  transform: translateX(0%);
}


#login-form-submit {
  background-color: black;
  font-family: 'GmarketSans';
  color: white;
  border-radius: 10px;
  padding: 8px;
  min-width: 50px;
  min-height: 30px;
  transition: 0.4s;
  
}
#login-form-submit:hover {
  background-color: rgba(0, 0, 0, 0.8); 
  transition: 0.4s;
}

#sign-up-button {
  background-color: black;
  font-family: 'GmarketSans';
  color: white;
  border-radius: 10px;
  padding: 8px;
  min-width: 50px;
  min-height: 30px;
  transition: 0.4s;
  
}
#sign-up-button:hover {
  background-color: rgba(0, 0, 0, 0.8); 
  transition: 0.4s;
}