/* Body and Background */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(to bottom, #f8f9fa, #b1bac4);
    text-align: center;
}

/* Header */
header h1 {
    font-size: 2.5rem;
    color: #333;
    margin: 20px 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

/* Gallery */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 0; /* Ensures spacing */
}

.gallery img,
.gallery video {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.gallery img:hover,
.gallery video:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* Popup */
.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.popup-media {
    max-width: 90%;
    max-height: 90%;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.close {
    position: absolute;
    top: 20px;
    right: 40px;
    font-size: 40px;
    color: #fff;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #ff4d4d;
}

/* Arrow buttons */
.arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2.5rem;
    color: #fff;
    cursor: pointer;
    user-select: none;
    transition: color 0.3s;
}

.arrow:hover {
    color: #ff4d4d;
}

.left-arrow {
    left: 20px;
}

.right-arrow {
    right: 20px;
}