body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    background: #f9f9f9;
    color: #333;
}
nav {
    background-color: #333;
}
nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}
nav li {
    margin: 0;
}
nav a {
    color: white;
    padding: 15px 20px;
    display: block;
    text-decoration: none;
}
nav a:hover, nav a.active {
    background-color: #555;
}
main {
    max-width: 800px;
    min-height: 90vh;
    padding-bottom: 5vh;
    flex-grow: 1;
    overflow-y: auto;
    margin: 30px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 {
    margin-top: 0;
}
ul {
    padding-left: 20px;
}
.gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
.item {
    position: relative;
    width: 200px;
    height: 200px;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 0 8px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}
.item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 10px;
}
.label {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    white-space: nowrap;
}
.item:hover .label {
    top: -50px;
    opacity: 1;
}
#description-box {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    background: #c0f1fc;
    border: 1px solid #109196;
    border-radius: 10px;
    display: none;
    font-family: Arial, Helvetica, sans-serif;
}
#description-box h2 {
    margin-top: 0;
}
#description-box h3 {
    margin-bottom: 10px;
    color: #555;
}
#description-box ul {
    margin-top: 0;
    margin-bottom: 15px;
    padding-left: 20px;
}
.hidden {
    display: none;
}
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    margin-top: auto;
}