* {
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
}

body {
  background: #000;
  color: #fff;
}

a {
  color: #fff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.main {
  margin: 1rem;
  padding: 1rem;
  border: 1px solid #fff;
  border-radius: 1rem;
}

.main::before,
.main::after {
  content: '';
  background-image: url('../img/background-top.svg');
  background-repeat: no-repeat;
  background-size: contain;
  display: inline-block;
  position: fixed;
  top: 0;
  left: 0;
  width: 150vw;
  height: 100vh;
  z-index: -1;
}

.main::after {
  content: '';
  top: auto;
  left: auto;
  bottom: 0;
  right: 0;
  transform: rotate(180deg);
}

@media only screen and (min-width: 768px) {

  .main {
    max-width: 1024px;
    margin: 1rem auto;
  }

  .main::before,
  .main::after {
    width: 70vw;
  }
  
}