* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* main container */
.container {
  min-height: 100vh;
  display: flex;
  border: 20px solid rgb(0, 0, 0);
}

/* box-1 */
.container-1 {
  height: 50rem;
  width: 34.33rem;
  background-color: white;
}
/* box-2 */
.container-2 {
  height: 50rem;
  width: 34.33rem;
  background-color: white;
  /*positioning the button */
  display: flex;
  justify-content: center;
  align-items: center;
}
/* box-3 */
.container-3 {
  height: 50rem;
  width: 34.33rem;
  background-color: white;
}

/* button styling */
.Btn {
  color: whitesmoke;
  width: 10rem;
  height: 3rem;
  font-size: 1.5rem;
  background: rgba(0, 0, 0, 0.6);
  padding: 0.25px 0.5px;
  border: 3px solid whitesmoke;
  border-radius: 8px;
  outline: none;
  cursor: pointer;
  transition: all ease-in-out 1s;
  font-weight: bold;
}
/* button hover effect */
.Btn:hover {
  background: rgb(0, 0, 0);
  box-shadow: 0 0 50px rgb(15, 223, 238);
  width: 15rem;
}