body
{
margin:0;
  font-family: "Poppins", sans-serif;
  font-weight: 400;
  font-style: normal;
}


a:link
{
color:cyan;
text-decoration:none;
}
a:visited
{
color:cyan;
text-decoration:none;
}
a:hover
{
color:#00ff00;
text-decoration:underline;
}

.clanek
{
width:990px;
margin-left:auto;
margin-right:auto;
text-align:center;
display:flow-root;
}

@media screen and (max-width: 700px) {
  .clanek {
width:90%;
margin-left: 1px;
        margin-right: 1px;
  }
}


.beznytext
{
font-size:1.3em;
text-align:justify;
}

@media screen and (max-width: 700px) {
  .beznytext {
display:inherit;
font-size:2.0em;
text-align:center;
  }
}


.zona0
{
background-color:#ffffff;
width:100%;
}

.zona1
{
background-color:#003a5b;
width:100%;
padding-bottom:20px;
color:#f0f0f0;
}

div.zona1 strong
{
  color:#68c7ff;

}

.zona2
{
background-color:#ffffff;
width:100%;
padding-bottom:20px;
color:black;
}

div.zona2 i
{
color:rgb(0, 110, 253);
}

div.zona2 a:link
{
color:rgb(0, 110, 253);
text-decoration:underline;
}

div.zona2 a:link:hover
{
color:rgb(253, 0, 219);
text-decoration:underline;
}


.zona3
{
background-color:#040C1B;
width:100%;
padding-bottom:20px;
color:aliceblue;
}

div.zona3 strong
{
color:cornflowerblue;
}

.zona4
{
background-color:#000000;
width:100%;
padding-bottom:20px;
color:aliceblue;
}

div.zona4 strong
{
color:rgb(237, 19, 84);
}

.zona5
{
background-color:#000000;
width:100%;
padding-bottom:20px;
color:aliceblue;
}

div.zona5 strong
{
color:#3c80ff;
}

.zona6
{
background-color:#ffffff;
width:100%;
padding-bottom:20px;

}

.zona7
{
background-color:#06121b;
width:100%;
padding-bottom:20px;
color:aliceblue;
}

.zona8
{
background-color:#92e1f2;
width:100%;
padding-bottom:20px;

}

.zona10
{
background-color:#47c6d7;
width:100%;
padding-bottom:20px;

}

.zona11
{
background-color:#ffffff;
width:100%;
padding-bottom:20px;
}

.zona12
{
background-color:#000000;
width:100%;
padding-bottom:20px;
color:aliceblue;
}


.zona20
{
background-color:#222222;
width:100%;
padding-bottom:20px;
padding-top:20px;
color:aliceblue;
}

h1
{
font-size:4rem;
color:aliceblue;
}

@media screen and (max-width: 700px) {
  h1 {
font-size:3rem;
  }
}

h2
{
font-size:2rem;
}


h3
{
font-size:1.8rem;
}

.fade-in-section {
            opacity: 0;
            transition: opacity 1s ease-out, transform 1s ease-out;
        }

        .fade-in-section.is-visible {
            opacity: 1;
        }



.zaoblene
{
border-radius: 10px;
    border: 2px dashed #222222;
    padding: 10px;
    width: 25%;
    text-align: center;
    display: inline-table;
    height: 250px;
    margin-bottom: 10px;
    margin-top: 10px;
    margin-left: 5px;
    margin-right: 5px;
    background-color:#f0f0f0;
}

.zaoblene:hover
{
background-color:#dddddd;
}



.tooltip {
    position: relative;
    display: inline-block;
    cursor: pointer;
    text-decoration: underline dashed; 
    
}

.tooltip::after {
    content: attr(data-tooltip);
    visibility: hidden;
    width: 480px;  
    background-color: #ffe8bf;
    color: #000;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 10px;
    position: absolute;
    z-index: 1;
    bottom: 170%;  
    left: 50%;
    transform: translateX(-50%); 
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    font-weight: normal;
    
  
}

.tooltip:hover::after {
    visibility: visible;
    opacity: 1;
}

.tooltip::before {
    content: "";
    visibility: hidden;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    border-width: 25px; /* Velikost zob��ku */
    border-style: solid;
    border-color: #ffe8bf transparent  transparent transparent; /* Barva zob��ku: oran�ov� */
    margin-top: -25px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 2; /* Zaji�t�n�, �e zob��ek je nad bublinou */
    

}

.tooltip:hover::before {
    visibility: visible;
    opacity: 1;
}


.sloupec
{
display:inline-block;
text-align:center;
background-color:#eeeeee;
padding:5px;
font-size:1.2rem;
}

.tabulka
{
width:80%;
margin-left:auto;
margin-right:auto;
display: grid;
  grid-template-columns: 1fr 1fr; /* dvě stejně široké sloupce */
  gap: 10px; /* mezery mezi buňkami */
}



.thumbnail {
  cursor: pointer;
  max-width: 150px;
  height: 150px;
  object-fit: cover;
  margin: 10px;
  border:2px solid #aaaaaa;
  opacity:0.7;
  transition-duration: 0.5s;
}

.thumbnail:hover
{
opacity:1.0;
border:2px solid #ffaaaa;
transition-duration: 0.5s;
}        

#lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 1999;
}

#lightbox-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 90%;
  max-height: 90%;
}

#lightbox-image {
  max-width: 100%;
  max-height: 90vh;
  display: block;
  margin: 0 auto;
}

#close-button {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 30px;
  cursor: pointer;
}


.toggle-block {
  max-width: 400px;
  margin: 20px auto;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.toggle-header {
  padding: 15px 20px;
  font-size: 18px;
  font-weight: bold;
  color: #fff;
  cursor: pointer;
  text-align: center;
  transition: background-color 0.3s ease;
  user-select: none;
}

.toggle-header:hover {
  filter: brightness(1.1);
}

.toggle-content {
  max-height: 0;
  overflow: hidden;
  background-color: #f9f9f9;
  padding: 0 20px;
  font-size: 1rem;
  line-height: 1.5;
  transition: max-height 0.5s ease, padding 0.5s ease;
}

.toggle-content.open {
  max-height: 700px; /* dostatečně vysoká pro většinu obsahu */
  padding: 15px 20px;
}


#main-header {
  width: 100%;
  background-color: #ffffff;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 999;
}

.navbar {
  display: flex;
  justify-content: center;
  padding: 10px 0;
  background-color: #ffffff;
  font-family: 'Poppins', sans-serif;
  
}

.nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  padding: 0;
  margin: 0;
}

.nav-links li {
  margin: 0 15px;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.3s;
  font-weight: 600;
}

.nav-links a:hover {
  color: #007bff;
}

.publikace
{
  //width: 20%;
  display: inline-block;
  padding: 10px;
  transition-duration: 0.5s;
  object-fit: cover;
  width:150px;
  
}

.publikace:hover
{
  width:155px;
  transition-duration: 0.5s;
}


.edu-aktivita-body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
.edu-aktivita-grid {
  display: grid;
  //grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  padding: 20px;
  grid-template-columns: 1fr 1fr 1fr;
}
.edu-aktivita-card {
  border: 1px solid #ccc;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  background-color: #f9f9f9;
  transition: transform 0.2s;
  text-align: left;
}
.edu-aktivita-card:hover {
  transform: scale(1.02);
}
.edu-aktivita-card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}
.edu-aktivita-card h3 {
  margin: 10px;
}
.edu-aktivita-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  justify-content: center;
  align-items: center;
  z-index: 999;
}
.edu-aktivita-modal-content {
  background-color: white;
  padding: 20px;
  max-width: 80%;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: 8px;
}
.edu-aktivita-close-button {
  float: right;
  font-size: 20px;
  cursor: pointer;
}
.edu-aktivita-reseni-toggle {
  margin-top: 20px;
  padding: 10px 15px;
  background-color: #e0e0e0;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
.edu-aktivita-reseni {
  display: none;
  margin-top: 5px;
  background-color: #a7ffb1;
  padding: 10px;
  border-radius: 5px;
  font-size:1.0rem;
}

.aktivita-zadani
{
font-size:1.3rem;
color:#000000;
text-align:left;
}

.aktivita-cile
{
  font-size:1rem;
  color:#333333;
  text-align:left;

}

.idobrazku
{
display: inline-block;
text-align: center;
font-size:1rem;
}

div.idobrazku .thumbnail
{
opacity:1.0;
}



.bt
{
    background-color: #ebebeb;
    padding: 15px 20px;
    font-size: 1.5rem;
    font-weight: bold;
    color: #312e2e;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s ease;
    user-select: none;
    margin-left: auto;
    margin-right: auto;
    border-radius: 10px;
    width: 300px;
    border: 2px #444444 dashed;
}

.bt:hover
{
background-color: #dddddd;
}