/* B.B. Design Studio — 3D Portfolio gallery */

@import url('https://fonts.googleapis.com/css2?family=Raleway:wght@600;800&display=swap');

:root {
    --bg: #0b0b0d;
    --surface: #141417;
    --surface-2: #1c1c21;
    --text: #e8e8ea;
    --muted: #9a9aa2;
    --accent: #F90;
    --border: rgba(255, 255, 255, 0.08);
    --radius: 8px;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 'Raleway', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

body.lb-open {
    overflow: hidden;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
}

.wrap {
    width: min(1200px, 92vw);
    margin-inline: auto;
}

/* Header ------------------------------------------------------------------ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(11, 11, 13, 0.82);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.site-header .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-block: 14px;
}

.brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    line-height: 1.15;
}

.brand-name {
    font-weight: 800;
    letter-spacing: 0.02em;
    font-size: clamp(15px, 2vw, 19px);
}

.brand-sub {
    color: var(--muted);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.back {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.back:hover,
.back:focus-visible {
    color: var(--text);
    border-color: var(--accent);
}

/* Intro ------------------------------------------------------------------- */

.intro {
    color: var(--muted);
    margin: 28px 0 20px;
    max-width: 60ch;
    font-size: 15px;
}

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

.gallery {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fill, minmax(clamp(160px, 22vw, 260px), 1fr));
    padding-bottom: 8px;
}

.tile {
    position: relative;
    display: block;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    cursor: zoom-in;
}

.tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.45s ease, filter 0.45s ease;
}

.tile::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, 0.55));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tile:hover img,
.tile:focus-visible img {
    transform: scale(1.05);
}

.tile:hover::after,
.tile:focus-visible::after {
    opacity: 1;
}

.tile:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Footer ------------------------------------------------------------------ */

.site-footer {
    color: var(--muted);
    font-size: 13px;
    padding: 28px 0 40px;
}

/* Lightbox ---------------------------------------------------------------- */

.lb {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    place-items: center;
    padding: 4vh 4vw;
    background: rgba(0, 0, 0, 0.92);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.lb.open {
    display: grid;
    opacity: 1;
}

.lb-img {
    max-width: 92vw;
    max-height: 88vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: scale(0.985);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.lb.open .lb-img.loaded {
    opacity: 1;
    transform: none;
}

.lb-btn {
    position: absolute;
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: rgba(28, 28, 33, 0.85);
    color: var(--text);
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.lb-btn:hover,
.lb-btn:focus-visible {
    background: var(--surface-2);
    border-color: var(--accent);
    color: var(--accent);
}

.lb-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.lb-close {
    top: 18px;
    right: 18px;
    font-size: 30px;
}

.lb-prev {
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
}

.lb-next {
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
}

@media (max-width: 560px) {
    .intro {
        margin-top: 20px;
    }

    .lb-btn {
        width: 44px;
        height: 44px;
    }

    .lb-prev {
        left: 10px;
    }

    .lb-next {
        right: 10px;
    }

    .lb-close {
        top: 10px;
        right: 10px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tile img,
    .tile::after,
    .back,
    .lb,
    .lb-img {
        transition: none;
    }

    .tile:hover img,
    .tile:focus-visible img {
        transform: none;
    }
}