/* Gallery for the creative_coding repo. Dark by design: the artwork is dark,
   so the chrome stays quiet and lets the images carry the colour. */

:root {
    --bg: #0a0a0c;
    --surface: #131317;
    --surface-hover: #1b1b21;
    --border: #26262d;
    --border-strong: #3a3a44;
    --text: #e8e6e3;
    --muted: #8f8d96;
    --accent: #57c9dd;
    --accent-dim: rgba(87, 201, 221, 0.14);

    --radius: 10px;
    --page-max: 1500px;

    color-scheme: dark;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI",
        Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ---------------------------------------------------------- header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    align-items: baseline;
    justify-content: space-between;
    padding: 16px clamp(16px, 4vw, 40px);
    background: rgba(10, 10, 12, 0.86);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    font-size: 14px;
}

.breadcrumb .sep {
    color: var(--border-strong);
}

.breadcrumb .current {
    color: var(--text);
    font-weight: 600;
}

.breadcrumb a {
    color: var(--muted);
}

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

.site-nav {
    display: flex;
    gap: 6px;
}

.site-nav a {
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid transparent;
    color: var(--muted);
    font-size: 13px;
    letter-spacing: 0.01em;
}

.site-nav a:hover {
    color: var(--text);
    background: var(--surface-hover);
    text-decoration: none;
}

.site-nav a.active {
    color: var(--accent);
    border-color: var(--border-strong);
    background: var(--accent-dim);
}

/* ---------------------------------------------------------- layout */

.view {
    max-width: var(--page-max);
    margin: 0 auto;
    padding: clamp(24px, 4vw, 44px) clamp(16px, 4vw, 40px) 80px;
}

.page-head {
    max-width: 720px;
    margin-bottom: 32px;
}

.page-head h1 {
    margin: 0 0 8px;
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 650;
    letter-spacing: -0.02em;
}

.page-head p {
    margin: 0;
    color: var(--muted);
}

.section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 14px;
    margin: 40px 0 4px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.section-head:first-of-type {
    margin-top: 24px;
}

.section-head h2 {
    margin: 0;
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.section-head .count {
    color: var(--muted);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.section-blurb {
    margin: 0 0 20px;
    max-width: 680px;
    color: var(--muted);
    font-size: 14px;
}

/* ---------------------------------------------------------- category cards */

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.category-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: inherit;
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.category-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    text-decoration: none;
}

.category-card .cover {
    aspect-ratio: 16 / 10;
    background: #000;
    object-fit: cover;
    width: 100%;
}

.category-card .cover-placeholder {
    display: grid;
    place-items: center;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, #16161c, #0d0d11);
    color: var(--border-strong);
    font-size: 34px;
}

.category-card .body {
    padding: 16px 18px 18px;
}

.category-card h2 {
    margin: 0 0 6px;
    font-size: 18px;
    font-weight: 600;
}

.category-card p {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 14px;
}

.category-card .count {
    color: var(--accent);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------- filters */

.facets {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0 0 24px;
}

.facet-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.facet-label {
    min-width: 68px;
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.chip {
    padding: 4px 11px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--muted);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: color 0.12s ease, border-color 0.12s ease;
}

.chip:hover {
    color: var(--text);
    border-color: var(--border-strong);
}

.chip.active {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
}

/* ---------------------------------------------------------- image grid */

.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
    /* Groups mix portrait and landscape work. Let each tile take its own
       height rather than stretching to the tallest in the row. */
    align-items: start;
}

.tile {
    /* A button centres its contents vertically, which would float the
       image away from the top of the card. */
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: inherit;
    font: inherit;
    text-align: left;
    overflow: hidden;
    cursor: zoom-in;
    transition: border-color 0.15s ease;
}

.tile:hover,
.tile:focus-visible {
    border-color: var(--border-strong);
    outline: none;
}

.tile:focus-visible {
    border-color: var(--accent);
}

.tile img {
    display: block;
    width: 100%;
    background: #000;
}

.tile .tile-body {
    padding: 10px 12px 12px;
}

.tile .tile-title {
    font-size: 13px;
    font-weight: 550;
    letter-spacing: -0.005em;
    word-break: break-word;
}

.tile .tile-meta {
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

/* ---------------------------------------------------------- sketch cards */

.sketch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

.sketch-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    overflow: hidden;
}

.sketch-frame {
    position: relative;
    aspect-ratio: 4 / 3;
    background: #000;
}

.sketch-frame iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.sketch-poster {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    gap: 6px;
    border: 0;
    width: 100%;
    background: linear-gradient(135deg, #16161c, #08080a);
    color: var(--text);
    font: inherit;
    cursor: pointer;
}

.sketch-poster:hover {
    background: linear-gradient(135deg, #1c1c24, #0b0b0e);
}

.sketch-poster .play {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    color: var(--accent);
    font-size: 15px;
}

.sketch-poster .hint {
    color: var(--muted);
    font-size: 12px;
}

.sketch-body {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 14px 14px;
}

.sketch-body h3 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
}

.sketch-body .links {
    display: flex;
    gap: 12px;
    font-size: 12px;
}

/* ---------------------------------------------------------- empty state */

.empty {
    padding: 48px 0;
    color: var(--muted);
    text-align: center;
}

/* ---------------------------------------------------------- footer */

.site-footer {
    padding: 20px clamp(16px, 4vw, 40px) 40px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 12px;
}

/* ---------------------------------------------------------- lightbox */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    padding: 3vmin;
    background: rgba(5, 5, 7, 0.96);
}

.lightbox[hidden] {
    display: none;
}

.lightbox-figure {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin: 0;
    max-width: 100%;
    max-height: 100%;
}

.lightbox-figure img {
    max-width: 100%;
    max-height: 82vh;
    object-fit: contain;
    background: #000;
    border-radius: 4px;
}

.lightbox-caption {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 16px;
    color: var(--muted);
    font-size: 13px;
    text-align: center;
}

.lightbox-caption strong {
    color: var(--text);
    font-weight: 600;
}

.lightbox-close,
.lightbox-nav {
    position: absolute;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: rgba(19, 19, 23, 0.85);
    color: var(--text);
    cursor: pointer;
    transition: border-color 0.12s ease, color 0.12s ease;
}

.lightbox-close:hover,
.lightbox-nav:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.lightbox-close {
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 24px;
    line-height: 1;
}

.lightbox-nav {
    top: 50%;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    font-size: 28px;
    line-height: 1;
}

.lightbox-prev {
    left: 16px;
}

.lightbox-next {
    right: 16px;
}

@media (max-width: 640px) {
    .lightbox-nav {
        top: auto;
        bottom: 16px;
        transform: none;
    }
}