:root {
  --border: 1px solid #808080;
  --main-width: 1200px;
}
* {
  box-sizing: border-box;
}
.material-symbols-outlined {
  user-select: none;
}
body {
  margin: 0;
}
nav {
  border-bottom: 1px solid #ccc;
  padding: 1em;
}
nav ul {
  list-style-type: none;
  display: flex;
  gap: 1em;
  margin-block: 0;
}
main {
  margin: 1em auto;
  max-width: var(--main-width);
}
#stream {
  width: min(100vw, var(--main-width));
  aspect-ratio: 16 / 9;
  border: var(--border);
}