* {
  box-sizing: border-box;
}

@font-face {
  font-family: Roboto;
  font-style: normal;
  font-weight: 300;
  src: url(https://fonts.gstatic.com/s/roboto/v20/KFOlCnqEu92Fr1MmSU5fCRc4AMP6lbBP.woff2); 
}

body {
  padding: 20px;
  font-family: Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 22px;
  color: currentColor;
}

header {
  margin-bottom: 30px;
}

.container {
  max-width: 700px;
}

main {
  padding: 0;
}

fieldset {
  margin: 15px 0;
}

fieldset p {
  padding: 0;
  margin: 0;
  color: #6d6d6d;
  font-style: italic;
}

textarea {
  width: 100%;
  border: 2px solid currentColor;
  height: 200px;
  padding: 10px;
}

#warnings {
  color: #dd0000;
  padding: 5px 0;
}

#warnings:empty {
  display: none;
}

.audio-error {
  color: red;
  border: 2px solid red;
  padding: 10px;
}

pre, span.code {
  font-size: 14px;
  padding: 5px;
  font-family: Monaco, monospace;
  border: 1px solid #ffffff;
}

a {
  color: currentColor;
}

a:visited {
  color: currentColor;
}

h1 {
  margin: 20px 0;
}

h2 {
  margin-bottom: 5px;
}

p {
  text-align: start;
}

input {
  font-size: 1em;
}

button {
  margin: 0 4px;
  padding: 5px 10px;
  font-size: inherit;
  background: #e2fdf1;
  border: 1px solid #5c5c5c;
  border-radius: 4px;
}

button:hover {
  background-color: #3FB07C;
  color: white;
  border-color: #3FB07C;
}

.visible-background svg {
  background: #f5f5f5;
}

table {
  border-spacing: 0;
}

th {
  text-align: start;
}

th, td {
  border: 1px solid #dfe2e5;
  padding: 16px 20px;
}

tr:nth-child(even) {
  background-color: #F6F8FA;
}

.table-header td {
  background: #adf3f3;
  font-size: 22px;
}

@media only screen and (min-width:700px) {

  header {
    max-width: 1000px;
    margin: 0 auto 30px auto;
    padding: 0 30px;
  }

  /* center content on wider screens */
  .container {
    margin: 0 auto;
    max-width: 770px;
  }

  h1 {
    text-align: center;
  }

  table {
    margin: 0 auto;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    color: #ffffff;
    background: #121212;
  }
  .table-header td {
    color: #000000;
  }
  tr:nth-child(even) {
    background-color: #666666;
  }
  .visible-background svg {
    background: #404040;
  }
}