/* Osnovne postavke */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

nav ul, nav li {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Fiksna navigacija pri vrhu */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

/* Osnovni izgled glavne navigacije */
nav > ul {
    background-color: #003366; /* tamnoplava */
    display: flex;
    justify-content: space-around;
    align-items: center;
    font-family: sans-serif;
}

nav > ul > li {
    position: relative;
}

nav a {
    display: block;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

nav a:hover {
    background-color: #C89727;
}

/* Podmeni (drugi nivo) */
nav ul ul {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #293e6b;
    display: none;
    min-width: 250px;
    z-index: 1000;
}

nav ul ul li {
    position: relative;
}

/* Prikaz podmenija na hover */
nav ul li:hover > ul {
    display: block;
}

/* Treći nivo (npr. "Odlazna" i "Dolazna") */
nav ul ul ul {
    left: 100%;
    top: 0;
}

/* Hover efekti za podmenije */
nav ul ul a {
    padding: 12px 15px;
    color: white;
    background-color: #293e6b;
}

nav ul ul a:hover {
    background-color: #C89727;
}

/* Glavni sadržaj stranice */
main {
    max-width: 1000px;
    margin: 120px auto 40px; /* gornji razmak zbog fiksne navigacije */
    padding: 40px 20px;
    line-height: 1.6;
}

h1, h2, h3, h4 {
    color: #003366;
    text-align: center;
}


table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-family: 'Verdana', sans-serif;
  font-size: 16px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  border-radius: 12px;
  overflow: hidden;
}

/* Kontejner za responzivnost */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

/* Stil zaglavlja */
th {
  background-color: #005f99;
  color: #ffffff;
  text-align: left;
  padding: 14px;
  white-space: nowrap;
  position: relative;
  user-select: none;
}

/* Ikonice u zaglavlju - primer sa FontAwesome ili Unicode */
th.icon-name::after {
  content: " \1F4DA"; /* knjiga 📚 */
  margin-left: 8px;
  font-size: 18px;
}

th.icon-grade::after {
  content: " \2B50"; /* zvezdica ⭐ */
  margin-left: 8px;
  font-size: 18px;
}

th.icon-credits::after {
  content: " \2705"; /* zeleno čekiranje ✅ */
  margin-left: 8px;
  font-size: 18px;
}

th.icon-remarks::after {
  content: " \1F4AC"; /* oblačić za komentar 💬 */
  margin-left: 8px;
  font-size: 18px;
}

/* Stil ćelija */
td {
  padding: 14px;
  background-color: #ffffff;
  border-bottom: 1px solid #f0f0f0;
  white-space: nowrap;
}

/* Centriranje teksta u 1., 3. i 4. koloni */
/* nth-child indeksiranje počinje od 1 */
tbody td:nth-child(1),
tbody td:nth-child(3),
tbody td:nth-child(4) {
  text-align: center;
}

/* Za zaglavlja isto centriranje u odgovarajućim kolonama */
thead th:nth-child(1),
thead th:nth-child(3),
thead th:nth-child(4) {
  text-align: center;
}

/* Hover efekat */
tbody tr:hover td {
  background-color: #f1f9ff;
}

/* Poslednji red bez donje ivice */
tbody tr:last-child td {
  border-bottom: none;
}

.img-center {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

  #table-container {
    width: 100%;
    padding: 1rem;
    box-sizing: border-box;
    overflow-x: auto;
  }

  #common-courses-table {
    width: 100%;
    border-collapse: collapse;
    font-family: Arial, sans-serif;
    font-size: 14px;
    border-radius: 12px;
    overflow: hidden;
    word-break: break-word;
    table-layout: auto; /* omogućava da kolone budu šire ako je potrebno */
  }

  #common-courses-table th,
  #common-courses-table td {
    border: 1px solid #999;
    padding: 10px 12px;
    text-align: left;
    vertical-align: top;
  }

  #common-courses-table th {
   
    font-weight: bold;
    text-align: center;
  }

  #common-courses-table tr:nth-child(even) {
    background-color: #f9f9f9;
  }

  #common-courses-table td {
    background-color: #fff;
  }

  #common-courses-table th:first-child {
    border-top-left-radius: 12px;
  }

  #common-courses-table th:last-child {
    border-top-right-radius: 12px;
  }

  @media screen and (max-width: 768px) {
    #common-courses-table {
      font-size: 13px;
    }

    #common-courses-table th,
    #common-courses-table td {
      padding: 8px;
    }
  }
    
     

     .grid-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 60px;
        }

        .grid-section img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 0 auto;
        }

        .grid-section .text-content {
            text-align: left;
        }

        @media (max-width: 768px) {
            .grid-section {
                grid-template-columns: 1fr;
            }
        }
         #iframe-container {
      width: 400px;
      height: 300px;
      border: 2px solid #333;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 0 8px rgba(0,0,0,0.2);
      background-color: white;
    }

    #biografija {
      width: 100%;
      height: 100%;
      border: none;
    }
    #table-container {
  width: 100%;
  padding: 1rem;
  box-sizing: border-box;
  overflow-x: auto;
}

#master-courses-table {
  width: 100%;
  border-collapse: collapse;
  font-family: Arial, sans-serif;
  font-size: 14px;
  border-radius: 12px;
  overflow: hidden;
  word-break: break-word;
  table-layout: auto;
}

#master-courses-table th,
#master-courses-table td {
  border: 1px solid #999;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

#master-courses-table th {
  
  font-weight: bold;
  text-align: center;
}




#master-courses-table th:first-child {
  border-top-left-radius: 12px;
}

#master-courses-table th:last-child {
  border-top-right-radius: 12px;
}

/* Hamburger dugme */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    font-size: 30px;
    padding: 15px 20px;
    color: white;
    background-color: #003366;
    cursor: pointer;
}

/* Responzivna navigacija */
@media (max-width: 768px) {
    nav > ul {
        flex-direction: column;
        align-items: flex-start;
        display: none;
        width: 100%;
    }

    nav ul ul,
    nav ul ul ul {
        position: static;
    }

    nav ul li:hover > ul {
        display: block;
    }

    .nav-toggle:checked + .nav-toggle-label + ul {
        display: flex;
    }

    .nav-toggle-label {
        display: block;
    }

    nav a {
        padding: 12px 16px;
    }

    img {
      width: 350px;
    }
}