:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --border-color: #111111;
    --transition-speed: 0.2s;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: monospace, sans-serif;
    margin: 0;
    padding: 2rem;
}

.gallery-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}

.gallery-header h1 {
    font-size: 1.25rem;
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 1rem 0;
}

.album-nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.album-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background var(--transition-speed), color var(--transition-speed);
}

.album-btn:hover, .album-btn.active {
    background: var(--text-color);
    color: var(--bg-color);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border: 1px solid #e0e0e0;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0%);
    transition: filter var(--transition-speed), transform 0.3s ease;
}

.gallery-item img:hover {
    filter: grayscale(0%); /* Revela a cor original subtilmente ao passar o cursor, se desejado */
    transform: scale(1.03);
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.lightbox[hidden] {
    display: none;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    filter: grayscale(0%);
    border: 1px solid var(--border-color);
}

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    font-family: monospace;
}