body {
  font-family: sans-serif;
  margin: 0;
  background: rgb(249, 249, 249);
  --page-width: 62rem;
  overflow-x: hidden;
}

body.playing {
  background: black;
}

* {
  box-sizing: border-box;
}

@media (max-width: 45rem) {
  nav form {
    position: fixed;
    z-index: -1;
    top: 0;
    height: 100%;
    width: 100%;
  }
  .player {
    --page-width: 30rem;
  }
}

@media (max-width: 62rem) {
  .player {
    --page-width: 45rem;
  }
}

@media (min-width: 90rem) {
  body {
    --page-width: 80rem;
  }
}

nav {
  background: white;
  padding: .5rem;
  transition: all .5s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.playing nav {
  opacity: 0;
}

.playing nav:hover {
  opacity: 1;
}

nav svg {
  display: block;
  width: 2rem;
  height: 2rem;
  color: magenta;
}

nav form {
  display: flex;
  align-items: center;
  justify-content: center;
}

nav form[hidden] {
  display: none;
}

nav input {
  font-size: 1rem;
  font-family: sans-serif;
  padding: .2rem;
  border: .05rem solid black;
}

.new:after {
  content: '.';
  position: relative;
  right: -10px;
  top: -35px;
  clip-path: circle(7px);
  background: red;
  display: block;
}

.info-icon {
  cursor: pointer;
}

.info {
  background: white;
  padding: 1rem;
  margin: 2rem auto auto;
  max-width: 30rem;
  border: .2rem solid black;
  box-shadow: 0 0 2rem rgba(0, 0, 0, .5);
}

.info svg {
  width: 2rem;
  height: 2rem;
  float: right;
  color: magenta;
  cursor: pointer;
}

.player {
  background: black;
  height: calc((9 / 16) * var(--page-width));
}

.player iframe {
  width: 100%;
  max-width: var(--page-width);
  height: calc((9 / 16) * var(--page-width));
  display: block;
  margin: auto;
}

.player.float iframe {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 1;
  width: 30rem;
  height: calc((9 / 16) * 30rem);
}