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

  nav {
    position:absolute;
    top:0;
    left:0;
    width: 100%;
    background-color: purple;
    font-size: 18pt;
  }

  .nav-links {
    list-style-type: none;
    margin: 0;
    padding: 0;
    justify-content: center;
  display: flex;
}

.nav-links li {
    display: inline-block;
    margin-left: 20px;
}

.nav-links li a {
    color: #fff;
    text-decoration: none;
    padding: 10px 15px;
    display: inline-block;
    transition: background-color 0.3s;
}

.nav-links li a:hover {
    background-color: #450049;
}
  
  html, body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #FFC568;
    font-size: 62.5%;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  }
  @media screen and (max-width: 520px) {
    html, body {
      /* don't know how to set default units to rem in mojs :(( */
    }
  }
  
  h1 {
    margin-top: 40px;
    text-align: center;
    font-size: 35pt;
  }
  
  .container {
    width: 50rem;
    height: 20rem;
    position: relative;
  }
  
  .svg-container {
    z-index: 2;
    position: absolute;
  }
  
  .mo-container {
    width: 100%;
    height: 100%;
  }
  
  .line {
    fill: none;
    stroke: #FFFFFF;
    stroke-width: 8;
    stroke-linecap: round;
    stroke-miterlimit: 10;
  }
  
  .lttr {
    fill: #763C8C;
  }
  
  .sound {
    position: fixed;
    color: #763C8C;
    font-size: 1.6rem;
    bottom: 1rem;
    right: 1rem;
    text-decoration: underline;
    cursor: default;
  }
  .sound--off {
    text-decoration: line-through;
  }