body {
  margin: 0;
  padding: 0;
}
/* scroll */
::-webkit-scrollbar {
  width: 12px;  
  height: 12px; 
}

::-webkit-scrollbar-track {
  background: #f1f1f1; 
  border-radius: 10px;  
}


::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #888, #555);
  border-radius: 10px;   
  border: 3px solid #f1f1f1; 
}


::-webkit-scrollbar-thumb:hover {
  background-color: #555;  
}


/* nav */
.sidenav img {
  width: 175px;
  margin-left: 35px;
}
.sidenav {
  height: 100%;
  width: 280px;
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;
  background: rgb(36, 36, 36);
  background-repeat: no-repeat;
  background-size: cover;
  color: #e0e0e0;
  overflow-x: hidden;
  padding-top: 20px;
  border-top-right-radius: 30px;
  border-bottom-right-radius: 30px;
  padding: 15px;
  transition: all 0.3s ease;
      box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3); /* Jemný tieň na pravú stranu */
      top: 0;
      height: 100vh; /* Zabezpečí pokrytie celej výšky okna */
}

.sidenav a, .dropdown-btn {
  padding: 6px 8px 6px 16px;
  text-decoration: none;
  font-size: 20px;
  color: #ffffff;
  display: block;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  outline: none;
  font-family: 'ArchivoBlack';
  transition: all 0.3s ease-in-out;
}

.sidenav a:hover, .dropdown-btn:hover {
  color: #b1b1b1;
  padding-left: 20px;
}
.sidenav a {
  color: #ffffff;
  text-decoration: none;
  padding: 10px;
  font-size: 18px;
  transition: all 0.3s ease;
}
.sidenav a:hover {
  padding-left: 15px;
}
  
.active {
  background-color: rgba(0, 0, 0, 0.137);
  box-shadow: 0px 6px 12px rgba(0, 0, 0, 0.4); /* Hlbší a jemnejší tieň */
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  border: solid rgb(0, 0, 0) 2px;
  border-bottom: 0px;
  margin-top: 5px;
}

.dropdown-container {
  display: none;
  background-color: #262626;
  padding-left: 8px;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
  border: solid rgb(0, 0, 0) 2px;
  box-shadow: 0px 6px 12px rgba(0, 0, 0, 0.4); /* Hlbší a jemnejší tieň */
  padding: 5px;
}

.fa-caret-down {
  float: right;
  padding-right: 8px;
}

/* MENU BUTTON*/

.burger-button {
  background: #ffffff;
  border: 2px solid #ccc;
  border-radius: 8px;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px; /* Nastavená šírka tlačidla */
  height: 50px; /* Nastavená výška tlačidla */
  font-size: 24px; /* Nastavenie veľkosti symbolu */
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  margin-left: 50%;
}

.burger-button:hover {
  background-color: #f0f0f0;
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.15);
}
/* Skrytie burger tlačidla na väčších zariadeniach */
.burger-button {
  display: none;
}
#sideNav {
  display: block; /* MENU na PC */
}
/* Zobrazenie pre menšie zariadenia (mobilné) */
@media (max-width: 768px) {
  #sideNav {
    display: none; /* Skryté na mobilných zariadeniach */
  }

  .burger-button {
    display: block; /* Zobrazenie burger tlačidla na mobilných zariadeniach */
  }
}
  #sideNav.active {
    display: block;
    margin: 0;
    padding: 0;
    top: 0;
    height: 0;
}

/* Skrytie close tlačidla na väčších zariadeniach */
.close-button {
  display: none;
  position: absolute;
  top: 10px;
  right: 10px;
  background: #ffffff;
  border: 1px solid #ccc;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  font-size: 16px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* Zobrazenie close tlačidla na mobilných zariadeniach */
@media (max-width: 768px) {
  .close-button {
    display: flex;
  }
}

/* uvod */
body {
  background: rgb(255, 255, 255);
  background-repeat: no-repeat;
  background-size: cover;
}
.uvod img {
  width: 150px;
}
.uvod h1{
  font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: black;
  font-size: 65px;
}
h1, h2, h3 {
  font-family: 'Bebas Neue', sans-serif;
  color: #333;
  letter-spacing: 1px;
}

.uvod {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center; 
  margin-left: 15%;
}
/* body */
.text {
  margin-left: 20%;
  max-width: 75%;
  font-family: verdana;
}
.obr_text img {
  width: 45%;
  margin-left: 20%;
}
.obr_text p {
  margin-left: 3%;
  text-align: center;
}
.obr_text {
  display: flex;
  justify-content: center;
  align-items: center;
}
.porty {
  width: 75%;
  left: 50%;
}

table {
  width: 75%;
  border-collapse: collapse;
}

table, th, td {
  border: 1px solid #000000;
}

th, td {
  padding: 12px;
  text-align: left;
}

th {
  background-color: #f2f2f2;
}

tr:nth-child(even) {
  background-color: #f2f2f2;
}

video {
  width: 650px;
}

/* MOBILNA VERZIA */
@media (max-width: 768px) {
  .uvod {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center; 
    margin-left: 0px;
  }
  .uvod h1{
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: black;
    font-size: 35px;
    margin-left: 5%;
  }
  .text {
    margin-left: 15%;
    font-family: Verdana;
  }
  .text img {
    max-width: 100%;
  }
  table {
    width: 100%;
    border-collapse: collapse;
  }
  
  table, th, td {
    border: 1px solid #000000;
  }
  
  th, td {
    padding: 10px;
    text-align: center;
  }
  
  th {
    background-color: #f2f2f2;
  }
  
  tr:nth-child(even) {
    background-color: #f2f2f2;
  }
  video {
    width: 350px;
    }
}