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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #111;
    color: #eee;
    line-height: 1.5;
}

a {
    color: #ccc;
    text-decoration: none;
}
a:hover {
    color: #fff;
}

/* ── Header ────────────────────────────────────────────────────────── */

.site-header {
    padding: 1.25rem 2rem;
    text-align: center;
}
.site-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 0.05em;
}

/* ── Tag filter bar ────────────────────────────────────────────────── */

.tag-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem;
    padding: 0 2rem 1.5rem;
}
.tag-btn {
    background: transparent;
    border: 1px solid #444;
    color: #aaa;
    padding: 0.3rem 0.8rem;
    border-radius: 2rem;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.15s;
}
.tag-btn:hover {
    border-color: #888;
    color: #ddd;
}
.tag-btn.active {
    background: #fff;
    color: #111;
    border-color: #fff;
}

/* ── Gallery grid (justified rows) ─────────────────────────────────── */

.gallery {
    padding: 0 4px;
}
.gallery-row {
    display: flex;
    gap: 4px;
    margin-bottom: 4px;
}
.gallery-tile {
    display: block;
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
}
.gallery-tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s, opacity 0.3s;
}
.gallery-tile:hover img {
    transform: scale(1.03);
    opacity: 0.85;
}
.gallery-tile.hidden {
    display: none;
}

/* ── Detail page ───────────────────────────────────────────────────── */

.detail {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 3rem;
}
.detail-image {
    text-align: center;
    margin-bottom: 2rem;
}
.detail-image img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 4px;
}

.detail-info {
    max-width: 720px;
    margin: 0 auto;
}
.detail-info h1 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
}
.detail-description {
    color: #aaa;
    margin-bottom: 1.5rem;
}

.detail-meta {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1.5rem;
    margin-bottom: 2rem;
}
.detail-meta dt {
    color: #888;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.detail-meta dd {
    color: #ddd;
}

.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}
.tag {
    display: inline-block;
    font-size: 0.8rem;
    background: #222;
    border: 1px solid #444;
    padding: 0.15rem 0.6rem;
    border-radius: 2rem;
    color: #bbb;
    transition: all 0.15s;
}
.tag:hover {
    background: #333;
    color: #fff;
    border-color: #666;
}

/* ── Alternates ────────────────────────────────────────────────────── */

.detail-alternates {
    margin-bottom: 2rem;
}
.detail-alternates h2 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: #aaa;
}
.alternates-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.alternate-item {
    cursor: pointer;
    text-align: center;
    transition: opacity 0.15s;
}
.alternate-item:hover {
    opacity: 0.8;
}
.alternate-item img {
    width: 140px;
    height: 100px;
    object-fit: cover;
    border-radius: 4px;
    border: 2px solid transparent;
    transition: border-color 0.15s;
}
.alternate-item:hover img {
    border-color: #666;
}
.alternate-item.active img {
    border-color: #fff;
}
.alternate-item span {
    display: block;
    font-size: 0.75rem;
    color: #888;
    margin-top: 0.25rem;
}

/* ── Navigation ────────────────────────────────────────────────────── */

.detail-nav {
    display: flex;
    justify-content: space-between;
    padding-top: 2rem;
    border-top: 1px solid #333;
}
.detail-nav-link {
    color: #888;
    font-size: 0.9rem;
}
.detail-nav-link:hover {
    color: #fff;
}

/* ── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 600px) {
    .site-header {
        padding: 1rem;
    }
    .tag-bar {
        padding: 0 1rem 1rem;
    }
    .detail {
        padding: 0 1rem 2rem;
    }
    .detail-meta {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }
    .detail-meta dt {
        margin-top: 0.5rem;
    }
}