<script>
  import { onMount } from 'svelte';
  import { getJSON } from '$lib/api.js';
  import { afterNavigate, goto } from '$app/navigation';
  import HubBar from '$lib/components/HubBar.svelte';

  // Virtual frames the viewer can switch between — remembered locally, no account needed.
  const FRAMES = [
    { id: 'walnut', label: 'Walnut' },
    { id: 'oak', label: 'Oak' },
    { id: 'mahogany', label: 'Mahogany' },
    { id: 'gold', label: 'Gold' },
    { id: 'silver', label: 'Silver' },
    { id: 'black', label: 'Black' },
    { id: 'none', label: 'No frame' },
  ];

  let art = $state(null);
  let state = $state('loading');   // loading | ready | empty
  let zoom = $state(false);
  let frame = $state('walnut');
  let thickness = $state(1);       // frame-scale multiplier, 0.7–1.9 (mat caps at 1.5)
  let lightboxEl = $state(null);
  // Wide paintings fill a portrait phone far better turned sideways: when the art is
  // landscape we rotate the fullscreen view 90° (CSS handles WHEN — only narrow+portrait
  // screens; desktop and portrait art stay upright). Aspect is read off the loaded image.
  let landscape = $state(false);

  function onKey(e) {
    if (e.key === 'Escape' && zoom) zoom = false;
  }
  // Move focus to the lightbox when it opens, so Escape/Enter work and focus is trapped sanely.
  $effect(() => { if (zoom && lightboxEl) lightboxEl.focus(); });

  // Same single-history Back as the hub pages: return to where you came from (the hub),
  // or fall back to it on a cold deep-link without pushing a new entry.
  let cameFromApp = $state(false);
  afterNavigate(({ from }) => { if (from) cameFromApp = true; });
  function goBack() {
    if (cameFromApp && typeof history !== 'undefined') history.back();
    else goto('/home3', { replaceState: true });
  }

  // Woods are built from four real mitered rails (grain turns at the corners); metals/none aren't.
  let isWood = $derived(['walnut', 'oak', 'mahogany'].includes(frame));

  onMount(async () => {
    try {
      const saved = localStorage.getItem('ub_art_frame');
      if (saved && FRAMES.some((f) => f.id === saved)) frame = saved;
      const t = parseFloat(localStorage.getItem('ub_art_thickness'));
      if (t >= 0.7 && t <= 1.9) thickness = t;
    } catch { /* private mode — defaults are fine */ }
    try {
      art = await getJSON('/api/art/today');
      state = art?.image_url ? 'ready' : 'empty';
    } catch {
      state = 'empty';
    }
  });

  function setFrame(id) {
    frame = id;
    try { localStorage.setItem('ub_art_frame', id); } catch { /* ignore */ }
  }

  function saveThickness() {
    try { localStorage.setItem('ub_art_thickness', String(thickness)); } catch { /* ignore */ }
  }

  const MONTHS = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
  let dateLabel = $derived.by(() => {
    if (!art?.date) return '';
    const [, m, d] = art.date.split('-').map(Number);
    return MONTHS[m - 1] ? `${MONTHS[m - 1]} ${d}` : '';
  });
  // "Winslow Homer, 1865 — oil on canvas"
  let attribution = $derived.by(() => {
    if (!art) return '';
    const who = [art.artist, art.date_text].filter(Boolean).join(', ');
    return art.medium ? (who ? `${who} — ${art.medium}` : art.medium) : who;
  });
  let dlName = $derived(art ? `${(art.title || 'artwork').replace(/[^\w \-]+/g, '').trim()}.jpg` : 'artwork.jpg');

  let detailsOpen = $state(true);   // mobile: collapse the writeup to bring the controls up near the art

  let copied = $state(false);
  async function share() {
    const url = art?.source_url || location.href;
    try {
      if (navigator.share) { await navigator.share({ title: art?.title || 'Daily Art', url }); return; }
      await navigator.clipboard.writeText(url);
      copied = true; setTimeout(() => (copied = false), 1800);
    } catch { /* cancelled / unsupported — no-op */ }
  }
</script>

<svelte:window onkeydown={onKey} />

<svelte:head>
  <title>Daily Art · upbeatBytes</title>
  <meta name="description" content="A masterwork a day from the world's open museum collections — one piece, beautifully framed, on upbeatBytes." />
</svelte:head>

{#snippet woodRails()}
  <span class="rail rail--t"></span>
  <span class="rail rail--r"></span>
  <span class="rail rail--b"></span>
  <span class="rail rail--l"></span>
{/snippet}

<div class="room">
  <HubBar active="art" />

  <main class="gallery">
    <button class="back" onclick={goBack} aria-label="Go back">
      <svg viewBox="0 0 24 24" width="15" height="15" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
        <path d="M15 18l-6-6 6-6" />
      </svg>
      Back
    </button>
    {#if state === 'ready'}
      <!-- "The Story": the guide write-up on the left, the framed piece + controls on the right -->
      <article class="story-card">
        <div class="left">
          <div class="head">
            <div class="kicker"><span class="kicker-rule"></span>Daily Art{#if dateLabel} · {dateLabel}{/if}</div>
            <h1 class="art-title">{art.title}</h1>
            {#if attribution}<p class="attribution">{attribution}</p>{/if}
          </div>
          <div class="body">
            <button class="details-toggle" onclick={() => (detailsOpen = !detailsOpen)}
                    aria-expanded={detailsOpen} aria-controls="art-details">
              About this piece
              <svg class="chev" class:open={detailsOpen} viewBox="0 0 24 24" width="14" height="14"
                   fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
                <path d="M6 9l6 6 6-6" />
              </svg>
            </button>
            <div class="body-content" id="art-details" class:collapsed={!detailsOpen}>
              {#if art.blurb}<p class="blurb">{art.blurb}</p>{/if}
              <div class="meta-cols">
                <div class="meta"><span class="meta-label">Collection</span><span class="meta-val">{art.museum}</span></div>
                {#if art.license}<div class="meta"><span class="meta-label">Rights</span><span class="meta-val">{art.license}</span></div>{/if}
              </div>
              {#if art.source_url}
                <a class="cta" href={art.source_url} target="_blank" rel="noopener">View at {art.museum} →</a>
              {/if}
            </div>
          </div>
        </div>

        <div class="right">
          <div class="art-stage">
            <button class="frame frame--{frame} art-frame" style="--frame-scale:{thickness}"
                    onclick={() => (zoom = true)} aria-label="Expand artwork">
              {#if isWood}{@render woodRails()}{/if}
              <span class="mat">
                <img src={art.image_url} alt={art.title}
                     onload={(e) => (landscape = e.currentTarget.naturalWidth > e.currentTarget.naturalHeight)} />
                <span class="hint">
                  <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor"
                       stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
                    <path d="M9 4H4v5M15 4h5v5M9 20H4v-5M15 20h5v-5" />
                  </svg>
                  Expand
                </span>
              </span>
            </button>
          </div>

          <div class="controls">
            <div class="ctl-row">
              <span class="ctl-label">Frame</span>
              <div class="swatches">
                {#each FRAMES as f}
                  <button class="swatch swatch--{f.id}" class:on={frame === f.id}
                          onclick={() => setFrame(f.id)} aria-pressed={frame === f.id} title={f.label}>
                    <span class="sr">{f.label}</span>
                  </button>
                {/each}
              </div>
            </div>
            {#if frame !== 'none'}
              <div class="ctl-row">
                <span class="ctl-label">Thickness</span>
                <input type="range" min="0.7" max="1.9" step="0.05"
                       bind:value={thickness} oninput={saveThickness} aria-label="Frame thickness" />
              </div>
            {/if}

            {#if art.palette?.length}
              <div class="ctl-divider"></div>
              <div class="ctl-label">Colors in this piece</div>
              <div class="palette" aria-hidden="true">
                {#each art.palette as c}<span class="chip" style="background:{c}"></span>{/each}
              </div>
            {/if}

            <div class="actions">
              <button class="act act-share" onclick={share}>{copied ? 'Link copied' : '↗ Share'}</button>
              {#if art.is_public_domain}
                <a class="act act-dl" href={art.image_url_large || art.image_url} download={dlName}>↓ Download</a>
              {/if}
            </div>
          </div>
        </div>
      </article>
    {:else if state === 'empty'}
      <p class="note">The gallery's resting — a new piece is hung each morning. Check back soon.</p>
    {:else}
      <p class="note">Hanging today's piece…</p>
    {/if}
  </main>

  <footer class="foot">upbeatBytes — no ads, no paywalls, no doomscrolling.</footer>
</div>

{#if zoom && art}
  <button class="lightbox" class:rotate={landscape} bind:this={lightboxEl} onclick={() => (zoom = false)} aria-label="Close artwork">
    <span class="lb-stage">
      <span class="frame frame--{frame} lb-frame" style="--frame-scale:{thickness}">
        {#if isWood}{@render woodRails()}{/if}
        <span class="mat"><img src={art.image_url_large || art.image_url} alt={art.title} /></span>
      </span>
      <span class="lb-cap">{art.title}{#if art.artist}<span class="sep">·</span>{art.artist}{/if}</span>
    </span>
  </button>
{/if}

<style>
  @font-face { font-family: 'Hanken Grotesk'; src: url('/fonts/hanken-var.woff2') format('woff2'); font-weight: 400 700; font-style: normal; font-display: swap; }
  @font-face { font-family: 'Newsreader'; src: url('/fonts/newsreader-var.woff2') format('woff2'); font-weight: 400 600; font-style: normal; font-display: swap; }
  @font-face { font-family: 'Newsreader'; src: url('/fonts/newsreader-italic-var.woff2') format('woff2'); font-weight: 400 500; font-style: italic; font-display: swap; }
  @font-face { font-family: 'Space Mono'; src: url('/fonts/space-mono-latin.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }

  /* --- "The Story": editorial Daily Art page. Daily-Art identity = the purple accent. --- */
  .room {
    --canvas: #faf6ee;        /* warm room ground */
    --card: #ece1cc;          /* warm-tan story card */
    --art-band: #ddcfb2;      /* deeper tan behind the framed piece */
    --ink: #232a31;           /* dark slate — titles */
    --story: #4f4a3f;         /* warm body text */
    --muted: #8a8273;
    --label: #4a4334;         /* Space Mono micro-labels — darker so they stand out */
    --line: #ece5d8;
    --accent: #8857C2;        /* Daily-Art purple (matches the home tile) */
    --accent-deep: #6f42a8;
    min-height: 100vh;
    background: var(--canvas);
    color: var(--ink);
    font-family: 'Hanken Grotesk', ui-sans-serif, system-ui, -apple-system, sans-serif;
    display: flex;
    flex-direction: column;
    overflow-x: clip;        /* seatbelt: nothing can scroll the page sideways */
  }

  /* /art runs wider than the hub's 1180 column — the artwork is the point, and the
     mobile view is separate, so the desktop card gets room for a properly-sized piece. */
  .gallery {
    flex: 1; width: 100%; max-width: 1280px; margin: 0 auto;
    padding: clamp(10px, 2vw, 22px) clamp(18px, 5vw, 44px) clamp(28px, 5vw, 48px);
    box-sizing: border-box;
    display: flex; flex-direction: column; justify-content: center;
  }
  /* top-left Back */
  .back {
    align-self: flex-start; display: inline-flex; align-items: center; gap: 6px;
    margin: 0 0 clamp(10px, 2vw, 16px); padding: 6px 10px 6px 0;
    background: none; border: none; cursor: pointer; font: inherit; font-size: 14px;
    font-weight: 600; color: var(--muted); transition: color 0.15s ease;
    -webkit-tap-highlight-color: transparent;
  }
  .back:hover { color: var(--accent); }
  .back svg { transition: transform 0.15s ease; }
  .back:hover svg { transform: translateX(-2px); }

  /* The Story card: writeup (left) + framed art & controls (right). On phones the wrappers
     collapse (display:contents) so the pieces reflow to head → art → writeup → controls. */
  .story-card {
    display: flex; border-radius: 22px; overflow: hidden; background: var(--card);
    box-shadow: 0 16px 40px -22px rgba(120, 95, 50, 0.32);
  }
  .left { flex: 1; min-width: 0; padding: clamp(28px, 4vw, 50px) clamp(24px, 3.4vw, 46px); display: flex; flex-direction: column; justify-content: center; }
  .head, .body, .body-content { display: flex; flex-direction: column; }   /* so .cta align-self works */
  .details-toggle { display: none; }    /* desktop: the writeup is always shown in the left column */
  .chev { transition: transform 0.2s ease; }
  .kicker { display: inline-flex; align-items: center; gap: 9px; font-family: 'Space Mono', monospace; font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
  .kicker-rule { width: 18px; height: 2px; background: var(--accent); border-radius: 2px; }
  .art-title { font-family: 'Newsreader', Georgia, serif; font-weight: 500; font-size: clamp(2rem, 4.2vw, 2.9rem); line-height: 1.05; letter-spacing: -0.01em; color: var(--ink); margin: 14px 0 0; }
  .attribution { font-family: 'Newsreader', Georgia, serif; font-style: italic; font-size: clamp(1rem, 1.6vw, 1.13rem); color: #7a7263; margin: 12px 0 0; }
  .blurb { font-size: clamp(0.97rem, 1.25vw, 1.02rem); line-height: 1.72; color: var(--story); margin: 20px 0 0; max-width: 44ch; text-wrap: pretty; }
  .meta-cols { display: flex; gap: 36px; margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(120, 95, 50, 0.20); }
  .meta { display: flex; flex-direction: column; gap: 4px; }
  .meta-label { font-family: 'Space Mono', monospace; font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--label); }
  .meta-val { font-size: 14px; font-weight: 600; color: #3f3a30; }
  .cta { align-self: flex-start; margin-top: 26px; background: var(--accent); color: #fff; font-size: 14px; font-weight: 700; padding: 13px 22px; border-radius: 9px; text-decoration: none; transition: background 0.15s ease; -webkit-tap-highlight-color: transparent; }
  .cta:hover { background: var(--accent-deep); }

  /* right column: the framed piece on a deeper-tan ground, controls beneath */
  .right { flex: 0 0 50%; background: var(--art-band); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: clamp(28px, 3vw, 42px) clamp(20px, 2.5vw, 34px); }
  .art-stage { display: flex; justify-content: center; width: 100%; }
  .art-frame { max-width: 100%; }

  .controls { width: 100%; max-width: 440px; margin-top: clamp(24px, 3vw, 32px); }
  .ctl-row { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
  .ctl-row:first-child { margin-top: 0; }
  .ctl-label { font-family: 'Space Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--label); }
  .ctl-row > .ctl-label { width: 78px; flex: none; }
  .swatches { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
  .ctl-row input[type="range"] { flex: 1; accent-color: var(--accent); cursor: pointer; }
  .ctl-divider { height: 1px; background: rgba(120, 95, 50, 0.18); margin: 24px 0 18px; }
  .palette { display: flex; gap: 9px; margin-top: 11px; }
  .chip { flex: 1; max-width: 46px; height: 34px; border-radius: 8px; }
  .actions { display: flex; gap: 11px; margin-top: 24px; }
  .act { flex: 1; text-align: center; font-size: 13.5px; font-weight: 700; padding: 12px 0; border-radius: 9px; cursor: pointer; text-decoration: none; -webkit-tap-highlight-color: transparent; }
  .act-share { background: var(--accent); color: #fff; border: none; font-family: inherit; transition: background 0.15s ease; }
  .act-share:hover { background: var(--accent-deep); }
  .act-dl { border: 1.5px solid #c7b48f; color: var(--story); background: transparent; display: inline-flex; align-items: center; justify-content: center; transition: border-color 0.15s ease, color 0.15s ease; }
  .act-dl:hover { border-color: var(--accent); color: var(--accent); }

  /* Phones: collapse the wrappers so the four blocks reflow into one calm column —
     head → artwork → writeup → controls (the artwork sits high, seen before it's read). */
  @media (max-width: 760px) {
    .gallery { justify-content: flex-start; }
    .story-card { flex-direction: column; }
    .left, .right { display: contents; }              /* promote head/body/art-stage/controls */
    .head { order: 1; padding: clamp(22px, 5vw, 28px) clamp(18px, 5vw, 22px) 14px; }
    .art-stage { order: 2; background: var(--art-band); padding: 22px 18px; box-sizing: border-box; }
    .body { order: 3; padding: 6px clamp(18px, 5vw, 22px) 4px; }
    /* writeup collapses (tap "About this piece") so the controls rise up beside the art */
    .details-toggle {
      display: flex; align-items: center; justify-content: space-between; gap: 10px; width: 100%;
      background: none; border: none; cursor: pointer; padding: 14px 0;
      font-family: 'Space Mono', monospace; font-size: 11px; letter-spacing: 0.14em;
      text-transform: uppercase; color: var(--label); -webkit-tap-highlight-color: transparent;
      border-top: 1px solid rgba(120, 95, 50, 0.16);
    }
    .chev.open { transform: rotate(180deg); }
    .body-content.collapsed { display: none; }
    .controls { order: 4; width: auto; max-width: none; box-sizing: border-box;
                margin: 16px clamp(14px, 4vw, 18px) clamp(20px, 5vw, 24px);
                background: #fff; border: 1px solid #ece3d0; border-radius: 16px; padding: 18px 16px; }
    .meta-cols { gap: 28px; }
    .cta { align-self: stretch; text-align: center; }
  }

  /* The frame: a beveled moulding (wood/metal) around a cream mat around the art.
     --rail / --mat are the moulding and mat widths; both scale with --frame-scale (the
     thickness slider). EVERY variant — even "No frame" — reserves the same footprint, so
     switching frames never reflows the page. */
  .frame {
    box-sizing: border-box;
    /* Rail scales across the whole slider; the mat caps at scale 1.5 so the top of the
       slider thickens only the moulding (wood), holding the white border steady. */
    --rail: calc(clamp(11px, 2.3vw, 22px) * var(--frame-scale, 1));
    --mat: calc(clamp(10px, 2.4vw, 22px) * min(var(--frame-scale, 1), 1.5));
    border: none; cursor: zoom-in; background: none;
    position: relative; line-height: 0; display: inline-block; max-width: 100%;
    border-radius: 4px; padding: var(--rail);
    box-shadow: 0 24px 58px rgba(20, 30, 45, 0.20), 0 3px 10px rgba(20, 30, 45, 0.10);
  }
  /* The three woods share one real (CC0, Poly Haven) fine-grain texture, recolored per
     species with a CSS filter, with a soft bevel baked into the texture layer. Metals
     stay gradient. The texture sits on ::before (behind the mat); miters on ::after. */
  .frame--walnut, .frame--oak, .frame--mahogany {
    background: linear-gradient(135deg, #5a3a24, #34210f);   /* fallback if texture misses */
  }

  /* Four real mitered rails: the grain TURNS at every corner — horizontal moulding on the
     top/bottom rails (rotated texture), vertical on the sides — like four cut lengths of
     wood. Each rail is a trapezoid clipped to 45° at the joints; --rail drives size + cut.
     A directional bevel per rail (lit top-left) gives the moulding a rounded profile. */
  .rail {
    position: absolute; z-index: 0; pointer-events: none;
    background-position: center; background-size: cover; background-repeat: no-repeat;
  }
  .rail--t { top: 0; left: 0; right: 0; height: var(--rail);
    clip-path: polygon(0 0, 100% 0, calc(100% - var(--rail)) 100%, var(--rail) 100%);
    background-image: linear-gradient(to bottom, rgba(255,255,255,0.22), rgba(0,0,0,0.22)), url("/textures/wood-grain-h.jpg"); }
  .rail--b { bottom: 0; left: 0; right: 0; height: var(--rail);
    clip-path: polygon(var(--rail) 0, calc(100% - var(--rail)) 0, 100% 100%, 0 100%);
    background-image: linear-gradient(to top, rgba(255,255,255,0.05), rgba(0,0,0,0.36)), url("/textures/wood-grain-h.jpg"); }
  .rail--l { top: 0; bottom: 0; left: 0; width: var(--rail);
    clip-path: polygon(0 0, 100% var(--rail), 100% calc(100% - var(--rail)), 0 100%);
    background-image: linear-gradient(to right, rgba(255,255,255,0.20), rgba(0,0,0,0.22)), url("/textures/wood-grain.jpg"); }
  .rail--r { top: 0; bottom: 0; right: 0; width: var(--rail);
    clip-path: polygon(0 var(--rail), 100% 0, 100% 100%, 0 calc(100% - var(--rail)));
    background-image: linear-gradient(to left, rgba(255,255,255,0.05), rgba(0,0,0,0.36)), url("/textures/wood-grain.jpg"); }
  /* per-species recolor, now applied to the rails */
  .frame--walnut .rail { filter: brightness(1.08) saturate(1.05); }
  .frame--oak .rail { filter: brightness(1.72) contrast(0.92) saturate(1.12) sepia(0.22) hue-rotate(-6deg); }
  .frame--mahogany .rail { filter: brightness(0.98) contrast(1.06) saturate(1.55) sepia(0.4) hue-rotate(-16deg); }

  /* Metals: fine brushed striations over an anisotropic sheen. */
  .frame--gold {
    background:
      repeating-linear-gradient(180deg, rgba(255,255,255,0.08) 0 1px, rgba(120,80,10,0.07) 1px 2px),
      linear-gradient(135deg, #b88c3d, #ecd293 42%, #a9772f 60%, #dcbd71);
    box-shadow: 0 24px 58px rgba(20, 30, 45, 0.20),
      inset 0 0 0 1px rgba(255, 255, 255, 0.30),
      inset 0 2px 3px rgba(255, 249, 226, 0.60),
      inset 0 -3px 9px rgba(92, 62, 12, 0.48);
  }
  .frame--silver {
    background:
      repeating-linear-gradient(180deg, rgba(255,255,255,0.11) 0 1px, rgba(40,50,60,0.07) 1px 2px),
      linear-gradient(135deg, #a9b0ba, #edf0f3 45%, #98a0ab 62%, #d2d7de);
    box-shadow: 0 24px 58px rgba(20, 30, 45, 0.18),
      inset 0 0 0 1px rgba(255, 255, 255, 0.50),
      inset 0 2px 3px rgba(255, 255, 255, 0.75),
      inset 0 -3px 9px rgba(60, 70, 85, 0.42);
  }
  .frame--black {
    background: linear-gradient(135deg, #2a2c30, #15171a 45%, #25282c 60%, #101113);
    box-shadow: 0 24px 58px rgba(20, 30, 45, 0.30),
      inset 0 0 0 1px rgba(255, 255, 255, 0.08),
      inset 0 2px 3px rgba(255, 255, 255, 0.10),
      inset 0 -3px 9px rgba(0, 0, 0, 0.60);
  }

  /* Mitered (45°) corner joints for the woods — each seam runs from the outer corner to
     the mat, sized to the rail width so it tracks the thickness slider. */
  .frame--walnut::after, .frame--oak::after, .frame--mahogany::after {
    content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none; border-radius: inherit;
    background:
      linear-gradient(45deg, transparent calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 1px), transparent calc(50% + 1px)) top left / var(--rail) var(--rail) no-repeat,
      linear-gradient(135deg, transparent calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 1px), transparent calc(50% + 1px)) top right / var(--rail) var(--rail) no-repeat,
      linear-gradient(135deg, transparent calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 1px), transparent calc(50% + 1px)) bottom left / var(--rail) var(--rail) no-repeat,
      linear-gradient(45deg, transparent calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% - 0.9px), rgba(28, 16, 6, 0.7) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 0.1px), rgba(255, 230, 190, 0.34) calc(50% + 1px), transparent calc(50% + 1px)) bottom right / var(--rail) var(--rail) no-repeat;
  }

  .mat {
    display: block; position: relative; z-index: 1; background: #fbf8f1; border-radius: 1px;
    padding: var(--mat);
    /* The mat sits recessed below the moulding: a crisp rabbet groove at the lip, the
       frame casting shadow onto the top/left of the mat, the bottom/right catching light
       — a small chiseled step instead of a flat transition. */
    box-shadow:
      inset 0 0 0 1px rgba(40, 28, 16, 0.18),
      inset 0 6px 9px -3px rgba(0, 0, 0, 0.34),
      inset 6px 0 9px -4px rgba(0, 0, 0, 0.24),
      inset 0 -3px 6px -2px rgba(255, 255, 255, 0.55),
      inset -3px 0 6px -2px rgba(255, 255, 255, 0.40);
  }
  .frame img { display: block; width: 100%; height: auto; max-height: 72vh; object-fit: contain; border-radius: 1px; }

  /* No frame: keep the footprint (so switching never shifts the layout), drop the
     moulding + mat, and let the bare art float with a soft drop shadow. */
  .frame--none { background: transparent; box-shadow: none; }
  .frame--none .mat { background: transparent; box-shadow: none; }
  .frame--none img {
    border-radius: 6px;
    box-shadow: 0 18px 44px rgba(20, 30, 45, 0.20), 0 4px 12px rgba(20, 30, 45, 0.10);
  }

  /* A quiet, always-there affordance — no hover wobble. */
  .hint {
    position: absolute; right: 12px; bottom: 12px;
    display: inline-flex; align-items: center; gap: 6px;
    font-family: ui-sans-serif, system-ui, sans-serif;
    font-size: 0.76rem; font-weight: 600; line-height: 1; color: #fff;
    background: rgba(20, 26, 33, 0.50); border-radius: 999px; padding: 7px 11px;
    backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
    pointer-events: none; transition: background 0.2s ease;
  }
  .frame:hover .hint, .frame:focus-visible .hint { background: rgba(20, 26, 33, 0.72); }

  .sep { display: inline-block; margin: 0 0.5em; color: var(--muted); }   /* used in the lightbox caption */

  /* Frame chips read as little beveled beads; selection is a clean offset ring. */
  .swatch {
    width: 30px; height: 30px; border-radius: 50%; border: none; cursor: pointer; padding: 0;
    box-shadow: inset 0 2px 3px rgba(255, 255, 255, 0.38),
      inset 0 -3px 5px rgba(0, 0, 0, 0.30), 0 1px 3px rgba(0, 0, 0, 0.22);
    outline: 2.5px solid transparent; outline-offset: 2px;
    transition: outline-color 0.15s ease, transform 0.15s ease;
  }
  .swatch:hover { transform: translateY(-1px); }
  .swatch.on { outline-color: var(--accent); }
  .swatch--walnut { background: linear-gradient(150deg, #6b4528, #8a5d31 55%, #4f3420); }
  .swatch--oak { background: linear-gradient(150deg, #b07f46, #cb9c5b 55%, #8c5d2f); }
  .swatch--mahogany { background: linear-gradient(150deg, #5a241a, #7e3826 55%, #3a160e); }
  .swatch--gold { background: linear-gradient(150deg, #c79a45, #ecd293 55%, #a9772f); }
  .swatch--silver { background: linear-gradient(150deg, #aab1bb, #edf0f3 55%, #98a0ab); }
  .swatch--black { background: linear-gradient(150deg, #34373c, #16181b 55%, #0c0d0f); }
  .swatch--none { background: linear-gradient(150deg, #ffffff, #ece6da); }
  .sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

  .note { color: var(--muted); font-size: 1.05rem; margin-top: 40px; }

  .foot {
    text-align: center; color: var(--muted); font-size: 0.84rem;
    padding: 28px 16px 36px; border-top: 1px solid var(--line); margin-top: 24px;
  }

  .lightbox {
    position: fixed; inset: 0; z-index: 50; border: none; cursor: zoom-out;
    /* A soft, top-lit gallery wall — lighter than the page so every frame (Black
       included) reads, like a piece hung on a real wall. */
    background: linear-gradient(180deg, #efe9dd, #e2dbcc);
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; padding: 2.5vmin;
  }
  /* frame + caption travel together so a rotated view turns as one piece */
  .lb-stage { display: flex; flex-direction: column; align-items: center; gap: 12px; }
  /* The full-screen view wears the same frame. Rail + mat are only a touch larger than the
     page (keeping the ~1:1 wood:white proportion), and the image is capped so the whole
     framed piece — including the bottom rail — always fits on screen. */
  .lb-frame {
    cursor: zoom-out; max-width: 92vw;
    --rail: calc(clamp(18px, 1.9vw, 36px) * var(--frame-scale, 1));
    --mat: calc(clamp(16px, 1.6vw, 30px) * min(var(--frame-scale, 1), 1.5));
  }
  .lb-frame.frame--none { --rail: 0px; --mat: 0px; }   /* bare art fills the screen */
  .lb-frame img { max-width: 86vw; max-height: 66vh; width: auto; height: auto; object-fit: contain; }
  .lb-frame.frame--none img { max-width: 96vw; max-height: 88vh; }   /* no frame → go big */
  .lb-cap { color: #5b636e; font-size: 0.9rem; }
  .lb-cap .sep { color: #a6acb4; }

  /* On a narrow portrait phone the framed piece (image + mat + rail) overflowed the
     viewport — the rail got clipped and the whole thing read as distorted. Pull the
     image cap in so the WHOLE frame fits on screen, and leave room for the caption. */
  @media (max-width: 640px) {
    .lb-frame { max-width: 94vw; }
    .lb-frame img { max-width: 72vw; max-height: 60vh; }
    .lb-frame.frame--none img { max-width: 92vw; max-height: 78vh; }
  }

  /* Landscape artwork on a PORTRAIT phone: turn the whole stage 90° so the painting
     fills the long axis (turn the phone to view it level; tap anywhere to close). The
     image caps are in SWAPPED units — vh drives the on-screen long edge after rotation,
     vw the short edge — so it always fits. Desktop and portrait art never hit this. */
  @media (max-width: 640px) and (orientation: portrait) {
    .lightbox.rotate .lb-stage { transform: rotate(90deg); transform-origin: center; }
    .lightbox.rotate .lb-cap { display: none; }   /* would sit sideways; the placard's on the page */
    /* The image's SHORT edge + the frame's rail/mat map to the phone's narrow width, so
       cap it there (max-height, pre-rotation) with a modest fixed frame so the whole
       moulding always fits; the long edge (max-width → screen height) stays generous. */
    .lightbox.rotate .lb-frame { max-width: 92vh; }   /* rail/mat keep scaling with thickness */
    /* short edge (→ screen width after rotation) capped low enough that the frame fits even
       at max thickness; the long edge stays generous */
    .lightbox.rotate .lb-frame img { max-width: 88vh; max-height: 60vw; }
    .lightbox.rotate .lb-frame.frame--none img { max-width: 94vh; max-height: 92vw; }
  }
</style>
