h1 {
    color: rgb(0, 0, 0);
    font-size: 21pt;
    text-align:left;
    font-family: Arial, Helvetica, sans-serif;
  }
  
  h2 {color: rgb(41, 39, 39); font-size: 17pt}
  h3 {color: rgb(91, 32, 24); font-size: 15pt}
  p {font-size: 15pt; text-align: left; color: rgb(0, 0, 0)}
  li {font-size: 15pt}
  a {color: rgb(43, 3, 13); font-size: 15pt}
  
  .topnav {
    overflow: hidden;
    background-color: rgb(91, 32, 24);
  }
  
  .topnav a {
    float: left;
    color: #f2f2f2;
    text-align: left;
    padding: 15px;
    text-decoration: none;
    font-size: 16pt;
  }
  
  .topnav a:hover {
    text-decoration: underline
  }
  
  .topnav a.active {
    background-color: #000000;
    color: white;
  }
  
  /* Right-aligned section inside the top navigation */
  .topnav-right {
    float: right;
  }
  
  .topnav .icon {
    display: none;
  }
  
  .topnav .icon7 {
    position: absolute;
    right: 47.8px;
    top: 0;
  }
  
  .topnav .icon3 {
    position: absolute;
    right: 0px;
    top: 0;
  }
  
  body{
      background-color: rgb(255, 255, 255);
      font-family: sans-serif;
      border: 0;
      margin: 0;
      padding: 0;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
  }
  .img-container {
      text-align: center;
      display: block;
  }
  
  div.center {
    text-align: center;
  }
  
  #obalovydiv
  {
  background: #ffffff;
  width: 100%;
  font: Verdana, sans-serif;
  }
  .obsah
  {
  padding-left:35px;
  padding-right:35px;
  padding-top:0px;
  padding-bottom:20px;
  }
  
  .topnav a:hover {
    text-decoration: underline;
  }
  
  .topnav a.active {
    background-color: rgb(91, 32, 24);
    color: white;
  }
  
  
  /* Responsive navigation menu (for mobile devices) */
  @media screen and (max-width: 68em) {
    .predmety {
      display: none;
    }
    
    .topnav a:not {display: none;}
    .topnav a {
      float: left;
      font-size: 15pt;
    }
  
    .topnav-right a:not(:nth-child(0)) {display: none;}
  
  
  
  
    .topnav a.icon {
      float: right;
      display: block;
    }
  }
  
  @media screen and (max-width: 68em) {
    .predmety {
      display: none;
    }
    
    .topnav.responsive {position: relative;}
    .topnav.responsive .icon {
      position: absolute;
      right: 0;
      top: 0;
    }
  
  
  
    
    .topnav-right{
      float: left;
    }
  
    .topnav.responsive a {
      float: none;
      display: block;
      text-align: left;
    }
    .obsah {
      padding-left:15px;
      padding-right:15px;
      padding-top:0px;
      padding-bottom:20px;
  
  
    }
  }
  
  div.scroll {
    margin: 4px, 4px;
    padding: 4px;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
  }
  
  #hp  {
    float: right;    
     margin: 0 0 0 15px;
    }
  
  
  footer{
    margin-top: auto;
    background-color: rgb(91, 32, 24);
    width: 100%;
    text-align: center;
    padding-bottom: 15px;
      padding-top: 15px;
    bottom: 0;
  }
  
  footer a {
    color: #ffffff;
    font-size: 16pt;
  
  }
  
  article {
    margin: auto 0;
  }
  
  .question {
    margin-bottom: 1.2em;
  }
  
  .kvizy h2{
    color: rgb(255, 0, 162);
  }
  
  .kvizy {
    color: rgb(255, 0, 162);
  }
  
  button {
    background-color: rgb(91, 32, 24);
    color: white;
    padding-top: 0.625em;
    padding-right: 1.25em;
    padding-bottom: 0.625em;
    padding-left: 1.25em;
    border-radius: 8%;
    cursor: pointer;
  }
  
  .cislo-otazky{
    font-weight: bold;
  }
  
  .practise {
    color: rgb(0, 126, 210);
  }
  
  .practise h2 {
    color: rgb(0, 126, 210);
  }
  
  .yt {
    overflow-x: hidden;
  }
  
  .yt-sekce {
    text-align: center;
    overflow-x: hidden;
    padding-left: 10px;
    padding-right: 10px;
  }
  
  @media screen and (max-width: 68em) {
  .yt {
    width: 100%;
    text-align: center;
    overflow-x: hidden;
  }
  }