/* ==========================================================================
   WATER SHEEP SURVEY — pecha-inspired stylesheet
   Mobile-first, with desktop enhancements. Covers all pages of the site.
   ========================================================================== */

:root {
    /* Paper & ink — Tibetan manuscript paper palette */
    --paper:        #f4ecd8;
    --paper-deep:   #ebe0c4;
    --paper-bright: #faf4e2;
    --paper-edge:   #d9ca9f;
    --ink:          #1f1914;
    --ink-soft:     #4a3d2e;
    --ink-faded:    #7a6b55;

    /* mtshal — red cinnabar ink */
    --mtshal:       #9a2b1a;
    --mtshal-deep:  #6e1e12;
    --mtshal-tint:  rgba(154, 43, 26, 0.08);

    /* Blue accent for 'note' callouts */
    --blue:         #2e4a6b;
    --blue-tint:    rgba(46, 74, 107, 0.08);

    /* Gold leaf accent */
    --gold:         #b08a3e;

    /* Typography */
    --font-display: "EB Garamond", "Noto Serif Tibetan", Georgia, serif;
    --font-body:    "EB Garamond", "Noto Serif Tibetan", Georgia, serif;
    --font-data:    "Inter", "Noto Sans Tibetan", system-ui, sans-serif;
    --font-tib:     "Noto Serif Tibetan", "Jomolhari", "Microsoft Himalaya", serif;

    /* Rhythm */
    --rule:         1px solid var(--ink);
    --rule-soft:    1px solid rgba(31, 25, 20, 0.2);
    --rule-red:     1px solid var(--mtshal);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    /* Subtle paper grain */
    background-image:
        radial-gradient(circle at 20% 30%, rgba(121, 94, 48, 0.04) 0, transparent 2px),
        radial-gradient(circle at 70% 60%, rgba(121, 94, 48, 0.03) 0, transparent 1.5px),
        radial-gradient(circle at 45% 85%, rgba(121, 94, 48, 0.04) 0, transparent 2px);
    background-size: 140px 140px, 90px 90px, 180px 180px;
}

[lang="bo"], .tib {
    font-family: var(--font-tib);
    font-size: 1.1em;
    line-height: 1.9;
}

[lang="zh"], .zh {
    font-family: "Noto Serif CJK SC", "Noto Sans CJK SC", "STSong", serif;
}

a {
    color: var(--mtshal-deep);
    text-decoration: none;
    border-bottom: 1px solid rgba(154, 43, 26, 0.35);
    transition: color 150ms, border-color 150ms;
}
a:hover { color: var(--mtshal); border-bottom-color: var(--mtshal); }

p { margin: 0 0 1em; }

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.25;
    color: var(--ink);
}

h1 {
    font-size: clamp(1.7rem, 1.3rem + 1.3vw, 2.3rem);
    margin: 0 0 1.2rem;
    padding-bottom: 0.5rem;
    border-bottom: var(--rule);
    position: relative;
}
h1::before {
    content: "༄༅";
    font-family: var(--font-tib);
    color: var(--mtshal);
    font-size: 0.6em;
    margin-right: 0.5em;
    vertical-align: 0.15em;
}
h2 {
    font-size: 1.4rem;
    margin: 2rem 0 0.75rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--paper-edge);
}
h3 {
    font-size: 1.15rem;
    margin: 1.5rem 0 0.5rem;
    font-style: italic;
    color: var(--ink-soft);
}
h4 {
    font-size: 1.05rem;
    margin: 1.25rem 0 0.4rem;
}

blockquote {
    margin: 1.4em 0;
    padding: 0.2em 1.25em;
    border-left: 3px solid var(--mtshal);
    background: var(--paper-deep);
    color: var(--ink-soft);
    font-style: italic;
}
blockquote p:last-child { margin-bottom: 0; }

hr {
    border: none;
    border-top: 1px solid var(--paper-edge);
    margin: 2em 0;
    position: relative;
    height: 1px;
    overflow: visible;
}
hr::before {
    content: "༄༅";
    position: absolute;
    top: -0.9em;
    left: 50%;
    transform: translateX(-50%);
    background: var(--paper);
    padding: 0 0.75em;
    color: var(--mtshal);
    font-family: var(--font-tib);
    font-size: 1.2em;
}

ul, ol {
    margin: 0 0 1em;
    padding-left: 1.5em;
}
li { margin: 0.3em 0; }

sup { font-size: 0.7em; }
.footnote-ref { color: var(--mtshal-deep); font-weight: 600; }

.footnotes {
    margin-top: 3em;
    padding-top: 1em;
    border-top: var(--rule-soft);
    font-size: 0.88rem;
    color: var(--ink-soft);
}
.footnotes ol { padding-left: 1.3em; }

/* =========================================================================
   HEADER — pecha folio masthead
   ========================================================================= */
.site-header {
    position: relative;
    padding: 2.25rem 1.25rem 1.5rem;
    text-align: center;
    border-bottom: 3px double var(--ink);
}
.site-header::before,
.site-header::after {
    content: "";
    position: absolute;
    left: 1.25rem;
    right: 1.25rem;
    height: 1px;
    background: var(--ink);
}
.site-header::before { top: 8px; }
.site-header::after  { top: 12px; }

.site-header__inner {
    max-width: 1100px;
    margin: 0 auto;
}

.site-header__yigmgo {
    font-family: var(--font-tib);
    color: var(--mtshal);
    font-size: 2rem;
    line-height: 1;
    display: block;
    margin-bottom: 0.6rem;
}

.site-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.5rem, 4vw + 0.5rem, 2.8rem);
    line-height: 1.15;
    margin: 0 0 0.4rem;
    letter-spacing: 0.01em;
}
.site-title a {
    color: var(--ink);
    border-bottom: none;
}
.site-title__tib {
    display: block;
    font-family: var(--font-tib);
    font-weight: 500;
    color: var(--mtshal);
    font-size: 0.72em;
    margin-top: 0.35rem;
    letter-spacing: 0.02em;
}

.site-subtitle {
    font-style: italic;
    color: var(--ink-soft);
    font-size: 0.95rem;
    margin: 0.4rem auto 0;
    max-width: 68ch;
}

/* =========================================================================
   NAV — restrained uppercase, mtshal active state
   ========================================================================= */
.site-nav {
    border-bottom: var(--rule);
    background: var(--paper-deep);
    position: relative;
}
.site-nav__inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
}
.site-nav__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.1rem 0.25rem;
}
.site-nav__item {
    position: relative;
}
.site-nav__link {
    display: block;
    padding: 0.7rem 1rem;
    color: var(--ink-soft);
    font-family: var(--font-data);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    border-bottom: none;
    transition: color 150ms, background 150ms;
}
.site-nav__link:hover { color: var(--ink); background: rgba(31, 25, 20, 0.04); }
.site-nav__link.active {
    color: var(--mtshal);
    position: relative;
}
.site-nav__link.active::after {
    content: "";
    position: absolute;
    left: 1rem; right: 1rem; bottom: 0;
    height: 2px;
    background: var(--mtshal);
}

/* Dropdown submenu */
.site-nav__item--has-children:hover .site-nav__submenu,
.site-nav__item--has-children:focus-within .site-nav__submenu {
    display: block;
}
.site-nav__submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: var(--paper);
    border: var(--rule);
    border-top: none;
    list-style: none;
    margin: 0;
    padding: 0.4rem 0;
    z-index: 10;
    box-shadow: 0 4px 18px -6px rgba(31, 25, 20, 0.3);
}
.site-nav__submenu .site-nav__link {
    padding: 0.55rem 1.1rem;
    border-left: 3px solid transparent;
    letter-spacing: 0.1em;
    text-transform: none;
    font-size: 0.82rem;
}
.site-nav__submenu .site-nav__link:hover,
.site-nav__submenu .site-nav__link.active {
    border-left-color: var(--mtshal);
    background: var(--mtshal-tint);
}
.site-nav__submenu .site-nav__link.active::after { display: none; }

/* Mobile nav toggle */
.site-nav__toggle {
    display: none;
    background: none;
    border: none;
    color: var(--ink);
    font-family: var(--font-data);
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 0.75rem 1rem;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

@media (max-width: 700px) {
    .site-nav__toggle { display: block; }
    .site-nav__list {
        display: none;
        flex-direction: column;
        gap: 0;
    }
    .site-nav__list.open { display: flex; }
    .site-nav__link {
        padding: 0.8rem 1rem;
        border-bottom: 1px solid var(--paper-edge);
    }
    .site-nav__submenu {
        display: block;
        position: static;
        box-shadow: none;
        border: none;
        padding: 0;
        background: var(--paper-bright);
    }
    .site-nav__submenu .site-nav__link {
        padding-left: 2.5rem;
    }
}

/* =========================================================================
   MAIN CONTENT AREA
   ========================================================================= */
.site-main {
    max-width: 860px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
}

.page-meta {
    font-family: var(--font-data);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--ink-faded);
    margin-bottom: 2rem;
}

/* =========================================================================
   IMAGES — framed as document plates
   ========================================================================= */
figure {
    margin: 2em 0;
    padding: 0.9rem 0.9rem 0.5rem;
    background: var(--paper-deep);
    border: 1px solid var(--ink-faded);
    box-shadow:
        0 1px 0 var(--paper-edge),
        0 3px 0 var(--paper-edge),
        0 5px 18px -8px rgba(31, 25, 20, 0.35);
    text-align: center;
}
figure img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    background: #fff;
}
figcaption {
    font-family: var(--font-data);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-faded);
    margin-top: 0.7rem;
    text-align: center;
}

/* =========================================================================
   CALLOUTS
   ========================================================================= */
.callout {
    margin: 1.6em 0;
    padding: 1em 1.3em;
    border-left: 4px solid;
    background: var(--paper-bright);
    border-top: 1px solid var(--paper-edge);
    border-right: 1px solid var(--paper-edge);
    border-bottom: 1px solid var(--paper-edge);
}
.callout--warning {
    border-left-color: var(--mtshal);
    background: var(--mtshal-tint);
}
.callout--note {
    border-left-color: var(--blue);
    background: var(--blue-tint);
}
.callout__title {
    font-family: var(--font-display);
    font-weight: 500;
    font-style: italic;
    font-size: 1.05rem;
    margin: 0 0 0.4em 0;
    color: var(--ink);
}

/* =========================================================================
   DOWNLOAD CARDS — pecha folios with red chapter markers
   ========================================================================= */
.download-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--paper-deep);
    border: var(--rule-soft);
    border-left: 3px solid var(--mtshal);
    margin: 1rem 0;
    transition: transform 180ms ease, box-shadow 180ms ease;
}
.download-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px -12px rgba(31, 25, 20, 0.45);
}
.download-card a { border-bottom: none; }
.download-card a:hover { color: var(--mtshal); }

.download-card__icon {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--paper);
    font-family: var(--font-data);
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.05em;
    background: var(--mtshal);
}
.download-card__icon--xlsx { background: #4a6a3d; }
.download-card__icon--csv  { background: var(--blue); }
.download-card__icon--preview { background: var(--mtshal-deep); }

.download-card__body { flex: 1; min-width: 0; }

.download-card__title {
    font-family: var(--font-display);
    font-weight: 500;
    color: var(--ink);
    margin: 0 0 0.15em 0;
    font-size: 1.1rem;
    line-height: 1.25;
}
.download-card__meta {
    font-family: var(--font-data);
    font-size: 0.78rem;
    color: var(--ink-faded);
    margin: 0;
    letter-spacing: 0.02em;
}

/* =========================================================================
   HOMEPAGE — hero + explore cards
   ========================================================================= */
.home-hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.home-hero__text h1 {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0.3rem;
}
.home-hero__text h1::before {
    display: none;
}
.home-hero__dateline {
    font-family: var(--font-data);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--ink-faded);
    margin-bottom: 1.5rem;
}
.home-hero__dateline .dot {
    color: var(--mtshal);
    margin: 0 0.4em;
}
.home-hero__lede {
    font-size: clamp(1.1rem, 0.9rem + 0.6vw, 1.3rem);
    line-height: 1.55;
    margin: 0 0 1.25rem;
    color: var(--ink);
}
.home-hero__lede::first-letter {
    font-family: var(--font-display);
    float: left;
    font-size: 4.2em;
    line-height: 0.85;
    padding: 0.15em 0.12em 0 0;
    color: var(--mtshal);
    font-weight: 500;
}

.home-hero__plate {
    margin: 0;
    padding: 0.9rem 0.9rem 0.5rem;
    background: var(--paper-deep);
    border: 1px solid var(--ink-faded);
    box-shadow:
        0 1px 0 var(--paper-edge),
        0 3px 0 var(--paper-edge),
        0 5px 18px -8px rgba(31, 25, 20, 0.35);
    align-self: start;
}
.home-hero__plate img {
    display: block;
    width: 100%;
    height: auto;
}
.home-hero__plate figcaption {
    font-family: var(--font-data);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-faded);
    margin-top: 0.7rem;
    text-align: center;
}

@media (min-width: 780px) {
    .home-hero {
        grid-template-columns: 1.4fr 1fr;
        gap: 3rem;
        align-items: start;
    }
}

.explore {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: var(--rule);
    position: relative;
}
.explore::before {
    content: "༄༅";
    position: absolute;
    top: -0.85rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--paper);
    padding: 0 0.75rem;
    color: var(--mtshal);
    font-family: var(--font-tib);
    font-size: 1.4rem;
}
.explore h2 {
    font-family: var(--font-display);
    font-weight: 500;
    font-style: italic;
    font-size: 1.3rem;
    text-align: center;
    margin: 0 0 1.75rem;
    color: var(--ink-soft);
    border-bottom: none;
    padding-bottom: 0;
}
.explore h2::before { display: none; }

.cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}
.card {
    position: relative;
    padding: 1.5rem 1.5rem 1.75rem;
    background: var(--paper-deep);
    border: var(--rule-soft);
    border-left: 3px solid var(--mtshal);
    transition: transform 180ms ease, box-shadow 180ms ease;
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px -12px rgba(31, 25, 20, 0.45);
}
.card .sigil {
    font-family: var(--font-tib);
    color: var(--mtshal);
    font-size: 1.6rem;
    line-height: 1;
    margin-bottom: 0.5rem;
    display: block;
}
.card h3 {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 1.25rem;
    margin: 0 0 0.4rem;
    line-height: 1.25;
    font-style: normal;
    color: var(--ink);
}
.card h3 a {
    color: var(--ink);
    border-bottom: none;
}
.card h3 a:hover { color: var(--mtshal); }
.card .meta {
    font-family: var(--font-data);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-faded);
    margin: 0 0 0.75rem;
}
.card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--ink-soft);
    line-height: 1.55;
}

@media (min-width: 780px) {
    .cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* =========================================================================
   TABLES — scholarly presentation
   ========================================================================= */
.data-table-wrapper {
    overflow-x: auto;
    margin: 1.5em 0;
    border: 1px solid var(--paper-edge);
    background: var(--paper-bright);
}
.data-table, table.data-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.88rem;
    font-family: var(--font-data);
}
.data-table th, .data-table td {
    padding: 0.55em 0.9em;
    text-align: left;
    border-bottom: 1px solid var(--paper-edge);
    vertical-align: top;
}
.data-table thead th {
    background: var(--paper-deep);
    border-bottom: 2px solid var(--ink);
    color: var(--ink);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    position: sticky;
    top: 0;
}

/* Inline <code> and <pre> */
code, pre {
    font-family: "SF Mono", "Menlo", "Consolas", monospace;
    font-size: 0.85em;
}
code {
    background: var(--paper-deep);
    padding: 0.1em 0.35em;
    border: 1px solid var(--paper-edge);
}
pre {
    background: var(--paper-deep);
    padding: 1em 1.1em;
    border: 1px solid var(--paper-edge);
    border-left: 3px solid var(--mtshal);
    overflow-x: auto;
    line-height: 1.5;
    margin: 1.2em 0;
}
pre code {
    background: none;
    border: none;
    padding: 0;
}

/* =========================================================================
   PROMPT BLOCK — the long AI prompts on prompt.html pages
   Styled like <pre> but with wrapping enabled, so the prompts read as
   pre-formatted verbatim text but don't overflow narrow viewports.
   ========================================================================= */
.prompt-block {
    font-family: "SF Mono", "Menlo", "Consolas", monospace;
    font-size: 0.82rem;
    line-height: 1.55;
    white-space: pre-wrap;
    word-wrap: break-word;
    background: var(--paper-deep);
    color: var(--ink);
    padding: 1.25em 1.3em;
    margin: 1.5em 0;
    border: 1px solid var(--paper-edge);
    border-left: 3px solid var(--mtshal);
    max-height: 70vh;
    overflow-y: auto;
    box-shadow: inset 0 1px 0 var(--paper-bright);
}
.prompt-block [lang="bo"], .prompt-block .tib {
    font-family: var(--font-tib);
    font-size: 1.05em;
    line-height: 1.75;
}

/* =========================================================================
   FOOTER
   ========================================================================= */
.site-footer {
    border-top: 3px double var(--ink);
    background: var(--paper-deep);
    padding: 2rem 1.25rem 2.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--ink-soft);
}
.site-footer__inner {
    max-width: 1100px;
    margin: 0 auto;
}
.site-footer__yigmgo {
    font-family: var(--font-tib);
    color: var(--mtshal);
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
    display: block;
}
.site-footer p { margin: 0.3rem 0; }
.site-footer .tib { font-size: 1em; color: var(--mtshal-deep); }

/* =========================================================================
   SMALL PHONE OVERRIDES
   ========================================================================= */
@media (max-width: 420px) {
    body { font-size: 17px; }
    .site-header { padding: 1.75rem 1rem 1.25rem; }
    .site-header::before,
    .site-header::after { left: 0.75rem; right: 0.75rem; }
    .site-header__yigmgo { font-size: 1.6rem; }
    .site-main { padding: 1.75rem 1rem 2.25rem; }
    .card { padding: 1.25rem 1.25rem 1.5rem; }
    .download-card { flex-direction: column; align-items: flex-start; }
}

/* =========================================================================
   DESKTOP POLISH
   ========================================================================= */
@media (min-width: 960px) {
    body { font-size: 19px; }
    .site-main { padding: 3.5rem 2rem 4rem; }
    .site-header { padding: 2.75rem 2rem 1.75rem; }
}

/* =========================================================================
   PRINT
   ========================================================================= */
@media print {
    body { background: white; color: black; }
    .site-nav, .site-header::before, .site-header::after { display: none; }
    a { color: black; border-bottom: none; }
    .download-card, .callout, figure { page-break-inside: avoid; }
}

/* =========================================================================
   RESIZABLE COLUMN HANDLES — used by browser pages
   ========================================================================= */
.ws-col-resizer {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 6px;
    cursor: col-resize;
    user-select: none;
    touch-action: none;
    z-index: 5;
    background: transparent;
}
.ws-col-resizer:hover,
.ws-col-resizer.active {
    background: rgba(154, 43, 26, 0.25);
}

/* =========================================================================
   LIGHTBOX — zoom overlay for the homepage cover image
   ========================================================================= */

/* The clickable thumbnail — matches the existing plate styling but adds
   affordance cues so users realise it's interactive. */
.lightbox-trigger {
    display: block;
    width: 100%;
    padding: 0;
    margin: 0;
    border: none;
    background: none;
    cursor: zoom-in;
    transition: transform 180ms ease, filter 180ms ease;
}
.lightbox-trigger:hover,
.lightbox-trigger:focus-visible {
    transform: scale(1.015);
    filter: brightness(1.04);
    outline: none;
}
.lightbox-trigger:focus-visible {
    box-shadow: 0 0 0 3px var(--mtshal);
}
.lightbox-trigger img {
    display: block;
    width: 100%;
    height: auto;
}

/* Inline hint under the caption */
.home-hero__zoom-hint {
    font-style: italic;
    color: var(--ink-faded);
    font-family: var(--font-display);
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.88em;
    display: inline-block;
    margin-left: 0.3em;
}

/* The overlay itself — dark translucent backdrop filling the viewport */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    background: rgba(20, 15, 10, 0.86);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: lightbox-fade 220ms ease-out;
    cursor: zoom-out;
}
.lightbox.is-open {
    display: flex;
}

@keyframes lightbox-fade {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* The close × in the top-right corner */
.lightbox__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid rgba(244, 236, 216, 0.4);
    background: rgba(31, 25, 20, 0.6);
    color: var(--paper);
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 400;
    line-height: 1;
    cursor: pointer;
    transition: background 150ms, border-color 150ms, transform 150ms;
    z-index: 2;
}
.lightbox__close:hover,
.lightbox__close:focus-visible {
    background: var(--mtshal);
    border-color: var(--mtshal);
    outline: none;
    transform: scale(1.05);
}

/* The framed image inside — pecha plate styling, pale paper border */
.lightbox__frame {
    position: relative;
    margin: 0;
    padding: 0.9rem 0.9rem 0.6rem;
    background: var(--paper);
    border: 1px solid var(--ink-faded);
    box-shadow:
        0 1px 0 var(--paper-edge),
        0 3px 0 var(--paper-edge),
        0 15px 40px -10px rgba(0, 0, 0, 0.6);
    max-width: min(95vw, 1200px);
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    cursor: default;
}
.lightbox__img {
    display: block;
    max-width: 100%;
    max-height: calc(92vh - 5rem);
    width: auto;
    height: auto;
    margin: 0 auto;
    object-fit: contain;
    background: #fff;
}
.lightbox__caption {
    font-family: var(--font-data);
    font-size: 0.8rem;
    color: var(--ink-faded);
    margin-top: 0.7rem;
    text-align: center;
    line-height: 1.5;
    padding: 0 0.5rem;
}

/* Small-screen adjustments */
@media (max-width: 480px) {
    .lightbox {
        padding: 1rem 0.75rem;
    }
    .lightbox__close {
        top: 0.5rem;
        right: 0.5rem;
        width: 40px;
        height: 40px;
        font-size: 1.6rem;
    }
    .lightbox__frame {
        padding: 0.5rem 0.5rem 0.4rem;
    }
    .lightbox__caption {
        font-size: 0.72rem;
    }
}

/* Reduced motion — respect user preference */
@media (prefers-reduced-motion: reduce) {
    .lightbox-trigger {
        transition: none;
    }
    .lightbox-trigger:hover,
    .lightbox-trigger:focus-visible {
        transform: none;
    }
    .lightbox {
        animation: none;
    }
}