body {
  margin: 0;
  padding: 0;
}

.mainpage {
  margin-top: -250px;
}

.bg {
  display: grid;
  width: 100%;
  position: absolute;
  z-index: -1;
  margin-top: -50px;
}
.center {
  margin: auto;
  margin-top: 100px;
}
.col1 {
  z-index: -1;
}
.bg2 {
  width: 800px;
  margin-top: 200px;
  border-radius: 30px;
  opacity: 100%;
}
.col {
  display: grid;
  align-items: center;
}

#form {
  margin-top: -300px;
  margin-left: 450px;
  width: 300px;

  z-index: 1;
  opacity: 100%;
}

#form1 {
  background-color: whitesmoke;
}

#pass {
  border: 2px solid rgb(5, 5, 5);
  border-radius: 4px;
  margin-left: 3px;
  font-size: 15px;
}

#user {
  border: 2px solid rgb(5, 5, 5);
  border-radius: 4px;
  font-size: 15px;
}

#btn {
  background-color: #002df5;
  width: 70px;
  height: 30px;
  font-size: 12px;
  color: aliceblue;
  margin-left: 100px;
}