html {
  width: 100%;
  height: 100%;
  min-width: 320px;
  min-height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  background-image: url("../images/background.jpg");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  background-attachment: fixed;
}

body > main {
  flex-shrink: 0;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

body > main.frosted {
  background-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

body > main > iframe {
  flex-shrink: 0;
  flex-grow: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 1300px;
  height: 0px;
  max-height: 0;
  border-width: 0;
  text-shadow: none;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}