:root {
    --bg: #000000;
    --text: #ffffff;
    --muted: #888888;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
    padding: 40px;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 4px;
}

.nav {
    display: flex;
    gap: 40px;
}

.nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 2px;
    transition: 0.3s;
}

.nav a:hover {
    color: var(--text);
}

/* Masonry Gallery */
.gallery {
    display: flex;
    gap: 20px;
}

.gallery-column {
    flex: 33.33%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.gallery-column img {
    width: 100%;
    border-radius: 4px;
    filter: grayscale(80%);
    transition: 0.5s;
    cursor: pointer;
}

.gallery-column img:hover {
    filter: grayscale(0%);
    transform: scale(1.02);
}

/* Footer */
.footer {
    margin-top: 60px;
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
}

.demo {
    color: #444;
}

@media (max-width: 768px) {
    .header { flex-direction: column; gap: 24px; }
    .gallery { flex-direction: column; }
    .gallery-column { flex: 100%; }
}