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

:root {
    --bg: #0a0a0a;
    --text: #d4d4d4;
    --text-muted: #888;
    --gap: 4px;
    --col-size: 1fr;
}

html {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* --- Header --- */

.site-header {
    padding: 3rem 2rem 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

.site-header h1 {
    font-weight: 300;
    font-size: 2rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #f0f0f0;
}

.back-link {
    display: inline-block;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--text);
}

.photo-count {
    display: block;
    margin-top: 0.25rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* --- Gallery Overview --- */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 3rem 2rem 4rem;
    max-width: 1600px;
    margin: 0 auto;
}

.gallery-card {
    display: block;
    overflow: hidden;
    border-radius: 4px;
    background: #141414;
    transition: transform 0.3s ease;
}

.gallery-card:hover {
    transform: translateY(-2px);
}

.gallery-card-img {
    aspect-ratio: 3 / 2;
    overflow: hidden;
}

.gallery-card-img img {
    transition: transform 0.5s ease;
}

.gallery-card:hover .gallery-card-img img {
    transform: scale(1.03);
}

.gallery-card-info {
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.gallery-card-name {
    font-weight: 400;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    color: #f0f0f0;
}

.gallery-card-count {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* --- Masonry Grid --- */

.masonry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-flow: dense;
    gap: var(--gap);
    padding: 0 var(--gap) var(--gap);
    max-width: 1600px;
    margin: 0 auto;
}

.tile {
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

.tile img {
    transition: opacity 0.2s;
}

.tile:hover img {
    opacity: 0.85;
}

.tile-small {
    grid-column: span 1;
    grid-row: span 1;
    aspect-ratio: 1;
}

.tile-wide {
    grid-column: span 2;
    grid-row: span 1;
    aspect-ratio: 2 / 1;
}

.tile-tall {
    grid-column: span 1;
    grid-row: span 2;
}

.tile-large {
    grid-column: span 2;
    grid-row: span 2;
}

/* --- Footer --- */

.site-footer {
    padding: 2rem;
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    opacity: 0.5;
}

/* --- Lightbox --- */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.95);
}

.lightbox-img-wrap {
    position: relative;
    max-width: 90vw;
    max-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-img-wrap img {
    max-width: 90vw;
    max-height: 80vh;
    width: auto;
    height: auto;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text);
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
    z-index: 1001;
    line-height: 1;
}

.lightbox-close:hover {
    opacity: 1;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text);
    font-size: 2.5rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
    padding: 1rem;
    z-index: 1001;
    line-height: 1;
}

.lightbox-nav:hover {
    opacity: 1;
}

.lightbox-prev {
    left: 1rem;
}

.lightbox-next {
    right: 1rem;
}

.lightbox-exif {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.6;
    white-space: nowrap;
    z-index: 1001;
}

/* --- Mobile --- */

@media (max-width: 800px) {
    .site-header {
        padding: 2rem 1rem 1.5rem;
    }

    .site-header h1 {
        font-size: 1.75rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        padding: 0 1rem 3rem;
        gap: 1rem;
    }

    .masonry-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tile-wide,
    .tile-large {
        grid-column: span 2;
    }

    .tile-large {
        grid-row: span 2;
    }

    .tile-tall {
        grid-row: span 2;
    }

    .lightbox-nav {
        font-size: 1.5rem;
        padding: 0.5rem;
    }

    .lightbox-prev {
        left: 0.5rem;
    }

    .lightbox-next {
        right: 0.5rem;
    }

    .lightbox-exif {
        font-size: 0.65rem;
        bottom: 1rem;
        max-width: 90vw;
        white-space: normal;
    }
}