/* Global dark theme */
body {
    background: #121212;
    color: #e0e0e0;
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 20px;
}

/* Headings */
h1, h2 {
    text-align: center;
    color: #ffffff;
    margin-bottom: 20px;
}

/* Thumbnail grid */
.grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.thumb {
    width: 250px;
    height: 160px; /* fixed thumbnail height */
    overflow: hidden;
    border-radius: 8px;
    background: #1e1e1e;
}

.thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* fills box, crops edges */
    display: block;
}

.thumb:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(255,255,255,0.2);
}

/* Full image viewer */
.viewer {
    text-align: center;
    margin-top: 20px;
}

.viewer img {
    max-width: 95%;
    max-height: 90vh;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(255,255,255,0.15);
}

/* Download link */
.download {
    text-align: center;
    margin-top: 20px;
}

.download a {
    color: #00b7ff;
    text-decoration: none;
    font-size: 1.2em;
}

.download a:hover {
    text-decoration: underline;
}
/* Category bar */
.categories {
    text-align: center;
    margin-bottom: 25px;
}

.categories .cat {
    display: inline-block;
    padding: 8px 16px;
    margin: 5px;
    background: #1e1e1e;
    color: #e0e0e0;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
}

.categories .cat:hover {
    background: #333;
}

.categories .cat.active {
    background: #00b7ff;
    color: #000;
    font-weight: bold;
}