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

body {
  height: 100vh;
  /* background: url(image.jpg); */

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.header {
  margin-top: 2em;
  display: flex;
  align-items: center;
  justify-content: center;
  color: black;
  font-size: 50px;
}

.frame {
  border-radius: 25px;
  border: 1px solid transparent;
  width: 550px;
  height: 300px;
  margin: auto;
  position: absolute;
  top: 0%;
  bottom: 22%;
  left: 0%;
  right: 0%;
  border: 1px solid transparent;
  box-shadow: 0 0 35px #999;
  border-radius: 30px;
  opacity: 0.9;
  color: black;
}

.frame-btn {
  margin-top: 35vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#btn {
  border-radius: 25px;
  padding-top: 7px;
  padding-bottom: 9px;
  padding-right: 50px;
  padding-left: 50px;
  margin-top: 5em;
  cursor: pointer;
  color: white;
  background-size: 200%;
  transition: 0.6s;
  /* background-image: linear-gradient(to left, #12cbc4, #0652dd, #12cbc4); */
  background-color: rgb(48, 48, 48);
  font-size: 20px;
}

.frame-btn :hover {
  background-position: right;
}

#main {
  padding: 30px;
  font-size: 50px;
  /* overflow: scroll; */
}

@media screen and (max-width: 665px) {
  .frame {
    margin-top: 11em;
    width: 22em;
    height: 16em;
  }
  #main {
    font-size: 35px;
  }
  .header {
    margin-top: 2em;
    font-size: 40px;
  }
}