body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #5a8c80; /* Prilagodite boju */
    color: white;
    padding: 1rem 2rem;
    text-align: center;
}

main {
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 1rem auto;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
    font-size: 0.9em;
    color: #666;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 1rem;
    min-height: 400px; /* Minimalna visina da se izbjegne skakanje paginacije */
}

.gallery-item {
    cursor: pointer;
    overflow: hidden;
    border: 1px solid #ddd;
    transition: transform 0.2s ease;
    background-color: #eee; /* Pozadina dok se slika učitava */
    aspect-ratio: 1 / 1; /* Održava kvadratni oblik prije učitavanja slike */
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-item:hover {
    transform: scale(1.05);
    border-color: #aaa;
}

.gallery-item img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover; /* Osigurava da slika pokrije prostor bez izobličenja */
    /* Osnovna zaštita od preuzimanja slike iz thumbnaila */
    pointer-events: none;
}

/* Lightbox/Modal stilovi */
.lightbox {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex; /* Koristimo flex za centriranje */
    align-items: center;
    justify-content: center;
    overflow: auto; /* Omogućava scroll ako je slika prevelika */
}

.lightbox-content {
    position: relative;
    margin: auto;
    padding: 20px;
    max-width: 90%;
    max-height: 90%;
    text-align: center;
}

.image-container {
    position: relative; /* Važno za pozicioniranje vodenog žiga */
    display: inline-block; /* Da se prilagodi veličini slike */
    overflow: hidden; /* Za zoom */
}

#lightbox-img {
    display: block;
    max-width: 100%;
    max-height: 80vh; /* Ograničava visinu slike */
    margin: 0 auto;
    transition: transform 0.3s ease; /* Za glatki zoom */
     /* Osnovna zaštita od preuzimanja */
    -webkit-user-drag: none;
    user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    pointer-events: none; /* Dodatna mjera */
}

/* Vodeni žig - CSS verzija */
.watermark {
    position: absolute;
    bottom: 10px; /* Pozicija od dna */
    right: 10px;  /* Pozicija s desne strane */
    color: rgba(255, 255, 255, 0.4); /* Bijela s prozirnošću */
    font-size: 1.5vw; /* Veličina relativna širini viewporta */
    font-weight: bold;
    padding: 5px 10px;
    background-color: rgba(0, 0, 0, 0.2); /* Blaga pozadina */
    border-radius: 3px;
    pointer-events: none; /* Da ne ometa interakciju sa slikom */
    user-select: none; /* Da se ne može lako selektirati */
    z-index: 10; /* Iznad slike */
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5); /* Dodan blagi sjen */
}

.close-button {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    z-index: 1010; /* Iznad lightbox sadržaja */
}

.close-button:hover,
.close-button:focus {
    color: #bbb;
    text-decoration: none;
}

.nav-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
    padding: 16px;
    user-select: none;
    transition: 0.3s;
    z-index: 1010; /* Iznad lightbox sadržaja */
}

.nav-button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.prev-button {
    left: 20px;
}

.next-button {
    right: 20px;
}

.caption {
    margin-top: 15px;
    color: #ccc;
    font-size: 1.1em;
    text-align: center;
    line-height: 1.4;
}

.zoom-controls {
    margin-top: 10px;
    text-align: center;
}

.zoom-controls button {
    font-size: 1.2em;
    padding: 5px 10px;
    margin: 0 5px;
    cursor: pointer;
    background-color: #555;
    color: white;
    border: none;
    border-radius: 3px;
}
.zoom-controls button:hover {
    background-color: #777;
}

#usage-info {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    line-height: 1.6;
}

#usage-info h3 {
    color: #5a8c80;
}

/* Stilovi za paginaciju */
.pagination {
    margin-top: 2rem;
    margin-bottom: 1rem;
    text-align: center;
    padding: 1rem 0;
}

.pagination button {
    background-color: #ddd;
    color: #333;
    border: 1px solid #ccc;
    padding: 8px 12px;
    margin: 0 3px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.pagination button:hover {
    background-color: #ccc;
}

.pagination button.active {
    background-color: #5a8c80; /* Ista boja kao header */
    color: white;
    border-color: #5a8c80;
    font-weight: bold;
}

.pagination button:disabled {
    background-color: #e9e9e9;
    color: #aaa;
    cursor: not-allowed;
    border-color: #ddd;
}

.pagination span { /* Stil za eventualne točkice (...) */
    padding: 8px 12px;
    margin: 0 3px;
    color: #666;
}


/* Responsive design */
@media (max-width: 768px) {
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    .nav-button {
        font-size: 24px;
        padding: 12px;
    }
    .close-button {
        font-size: 30px;
        top: 15px;
        right: 25px;
    }
    #lightbox-img {
         max-height: 75vh;
    }
    .watermark {
        font-size: 2.5vw;
    }
     .pagination button {
        padding: 6px 10px;
        margin: 0 2px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5em;
    }
     header h2 {
        font-size: 1.1em;
    }
    main {
        padding: 1rem;
    }
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 5px;
    }
     .watermark {
        font-size: 3.5vw;
        bottom: 5px;
        right: 5px;
    }
     .pagination button {
        padding: 5px 8px;
        margin: 0 1px;
        font-size: 0.9em;
    }
     .pagination span {
        padding: 5px 8px;
        margin: 0 1px;
        font-size: 0.9em;
    }
     .nav-button {
        font-size: 20px;
        padding: 10px;
    }
    .prev-button { left: 5px; }
    .next-button { right: 5px; }
    .close-button { top: 10px; right: 15px; font-size: 28px;}
}