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(11, 27, 61); 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(11, 27, 61);
}

.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(11, 27, 61);
  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(11, 27, 61);
  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(11, 27, 61);
  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;
}
}