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sand3d-explorer
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/* Sand3D Explorer: Sandflow's light charter (27 Oct 2026). Inter only, Geist Mono for code,
   Craie background, violet carries accent text, one gradient (the band at the top). */

@font-face { font-family: "Inter"; font-weight: 300; font-display: swap; src: url("/static/fonts/Inter-Light.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("/static/fonts/Inter-Regular.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 500; font-display: swap; src: url("/static/fonts/Inter-Medium.woff2") format("woff2"); }
@font-face { font-family: "Geist Mono"; font-weight: 400; font-display: swap; src: url("/static/fonts/geist-mono-400.woff2") format("woff2"); }

:root {
  --encre: #121117; --craie: #F7F6F3; --gris: #6E6B76;
  --orange: #FF6408; --corail: #FF456A; --violet: #793CFF;
  --orange-texte: #B8460A; --corail-texte: #C2234A;
  --filet: #E4E1DB; --code-bg: #FBFAF8; --blanc: #FFFFFF;
  --sans: "Inter", system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --marge: clamp(20px, 5vw, 80px);
  --gout: 24px;
  --rayon: 6px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--craie); color: var(--encre);
  font: 400 15px/1.5 var(--sans); font-synthesis: none; -webkit-font-smoothing: antialiased;
}
a { color: var(--violet); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button, input, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.bande { height: 4px; background: url("/static/img/grad.jpg") center / cover no-repeat; }
.repere { font-size: 12px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--violet); margin: 0 0 12px; }

/* ---------------------------------------------------------------- header */
/* the header stays on screen: opaque Craie, a hairline under it; the toolbar sticks below it (--head-h, app.js) */
.top { position: sticky; top: 0; z-index: 10; background: var(--craie); border-bottom: 1px solid var(--filet); }
.top-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 24px;
           padding: 14px var(--marge); }
.brand { display: flex; align-items: center; gap: 16px; }
.brand a { color: var(--encre); }
.brand a:hover { text-decoration: none; }
.marque { height: 20px; width: auto; display: block; }
.product { font-weight: 500; font-size: 14px; padding-left: 16px; border-left: 1px solid var(--filet); }
.links { display: flex; align-items: center; gap: 4px; font-size: 13px; }
.ilink { display: inline-flex; align-items: center; gap: 8px; color: var(--encre); padding: 7px 9px; border-radius: var(--rayon);
         border: 1px solid transparent; transition: border-color 120ms, background 120ms; }
.ilink:hover { text-decoration: none; border-color: var(--filet); background: var(--blanc); }
.ilink:focus-visible { outline: 2px solid var(--violet); outline-offset: 1px; }
.ico { width: 18px; height: 18px; display: block; flex: none; }
.ilabel { white-space: nowrap; }

/* ---------------------------------------------------------------- hero */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--gout);
        align-items: center; padding: 12px var(--marge) 28px; }
.hero h1 { font-size: clamp(32px, 3.4vw, 52px); font-weight: 300; line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 18px; max-width: 18ch; }
.lead { font-size: 17px; line-height: 1.5; max-width: 46ch; margin: 0 0 16px; }
.stats { color: var(--gris); font-size: 14px; margin: 0; font-variant-numeric: tabular-nums; }
.hero-art { margin: 0; border-radius: var(--rayon); overflow: hidden; background: var(--blanc); }
.hero-art img { width: 100%; height: auto; display: block; aspect-ratio: 1660 / 640; }

/* ---------------------------------------------------------------- toolbar */
.toolbar { position: sticky; top: var(--head-h, 0px); z-index: 5; background: rgba(247, 246, 243, 0.94);
           backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
           padding: 16px var(--marge) 12px; border-bottom: 1px solid var(--filet); }
.search { display: flex; align-items: center; gap: 8px; background: var(--blanc); border: 1px solid var(--filet);
          border-radius: var(--rayon); padding: 4px 4px 4px 14px; max-width: 920px; }
.search:focus-within { border-color: var(--encre); }
.search-icon { width: 18px; height: 18px; fill: none; stroke: var(--gris); stroke-width: 1.8; flex: none; }
.search input { flex: 1; border: 0; outline: 0; background: transparent; font-size: 16px; padding: 10px 4px; min-width: 0; }
.search input::-webkit-search-cancel-button { filter: grayscale(1); }
.mode { display: flex; background: var(--craie); border-radius: 4px; padding: 3px; flex: none; }
.mode button { border: 0; background: transparent; padding: 7px 12px; border-radius: 3px; cursor: pointer; font-size: 13px; color: var(--gris); }
.mode button[aria-checked="true"] { background: var(--blanc); color: var(--encre); box-shadow: 0 0 0 1px var(--filet); }
.mode button:disabled { opacity: 0.4; cursor: not-allowed; }

.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px; margin-top: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1px solid var(--filet); background: var(--blanc); border-radius: 999px; padding: 5px 12px;
        cursor: pointer; font-size: 13px; display: inline-flex; gap: 6px; align-items: baseline; }
.chip .n { color: var(--gris); font-variant-numeric: tabular-nums; font-size: 12px; }
.chip[aria-pressed="true"] { background: var(--encre); border-color: var(--encre); color: var(--craie); }
.chip[aria-pressed="true"] .n { color: #B9B6BF; }
.select { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--gris); }
.select select { border: 1px solid var(--filet); background: var(--blanc); border-radius: var(--rayon); padding: 5px 8px;
                 font-size: 13px; color: var(--encre); max-width: 240px; }
.select select:disabled { opacity: 0.5; }
.toggle { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; cursor: pointer; user-select: none; }
.toggle input { accent-color: var(--violet); width: 15px; height: 15px; margin: 0; }
.count { margin: 10px 0 0; font-size: 13px; color: var(--gris); font-variant-numeric: tabular-nums; }
.count b { font-weight: 500; color: var(--encre); }

/* ---------------------------------------------------------------- grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(196px, 1fr)); gap: 16px;
        padding: 20px var(--marge) 8px; }
.card { background: var(--blanc); border: 1px solid var(--filet); border-radius: var(--rayon); overflow: hidden;
        color: var(--encre); display: flex; flex-direction: column; position: relative;
        transition: border-color 120ms, transform 120ms; }
.card:hover { border-color: #C9C5BD; text-decoration: none; transform: translateY(-1px); }
.card .thumb { aspect-ratio: 1; background: var(--blanc); position: relative; overflow: hidden; }
.card .thumb img { width: 100%; height: 100%; object-fit: contain; display: block; padding: 6px; }
.card .code-peek { position: absolute; inset: 0; margin: 0; padding: 12px; background: rgba(251, 250, 248, 0.97);
                   font: 10.5px/1.5 var(--mono); color: var(--encre); white-space: pre; overflow: hidden;
                   opacity: 0; transition: opacity 140ms; pointer-events: none; }
.card:hover .code-peek.ready { opacity: 1; }
.card .body { padding: 10px 12px 12px; border-top: 1px solid var(--filet); }
.card .name { font-weight: 500; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .meta { font-size: 12px; color: var(--gris); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.card .tags { display: flex; gap: 12px; margin-top: 8px; font-size: 11px; color: var(--gris); }
.tag { font-family: var(--mono); font-size: 11px; color: var(--gris); white-space: nowrap; }
.tag.violet { color: var(--violet); }
.skeleton { background: linear-gradient(90deg, #F1EFEB 0%, #F8F7F4 50%, #F1EFEB 100%); background-size: 200% 100%;
            animation: shimmer 1.2s infinite linear; border-radius: var(--rayon); aspect-ratio: 0.78; }
@keyframes shimmer { to { background-position: -200% 0; } }
.more { padding: 16px var(--marge) 48px; text-align: left; color: var(--gris); font-size: 13px; min-height: 40px; }
.empty { grid-column: 1 / -1; padding: 48px 0; color: var(--gris); }
.empty b { color: var(--encre); font-weight: 500; }

/* ---------------------------------------------------------------- about */
.about { padding: 48px var(--marge) 24px; border-top: 1px solid var(--filet); }
.about h2 { font-size: 28px; font-weight: 300; letter-spacing: -0.01em; margin: 0 0 24px; }
.ds-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--gout); }
.ds { border-top: 1px solid var(--encre); padding-top: 12px; }
.ds h3 { margin: 0 0 4px; font-size: 16px; font-weight: 500; display: flex; justify-content: space-between; }
.ds h3 span { font-weight: 400; color: var(--gris); font-variant-numeric: tabular-nums; }
.ds p { margin: 0 0 8px; color: var(--gris); font-size: 14px; }
.ds a { font-size: 13px; }
.note { color: var(--gris); font-size: 14px; max-width: 72ch; margin: 32px 0 0; }

/* ---------------------------------------------------------------- object page */
#object { padding: 8px var(--marge) 48px; }
.back { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--encre); background: none; border: 0;
        padding: 6px 0; cursor: pointer; margin-bottom: 12px; }
.back:hover { color: var(--violet); }
.obj-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px; align-items: start; }
.stage { background: var(--blanc); border: 1px solid var(--filet); border-radius: var(--rayon); overflow: hidden; position: relative; }
.stage .still, .stage .three { width: 100%; height: min(64vh, 600px); display: block; background: var(--blanc); }
.three { position: relative; cursor: grab; }
.three:active { cursor: grabbing; }
.three canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; display: block; opacity: 0; transition: opacity 200ms; }
.three.ready canvas { opacity: 1; }
.three .poster { position: absolute; inset: 0; height: 100%; transition: opacity 200ms; }
.three.ready .poster { opacity: 0; pointer-events: none; }
.three-loading { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--filet); overflow: hidden; }
.three-loading div { height: 100%; width: 30%; background: var(--violet); animation: slide 1.4s infinite ease-in-out; }
.three.ready .three-loading, .three.failed .three-loading { display: none; }
.three-tip { position: absolute; top: 0; left: 0; pointer-events: none; z-index: 3; background: var(--encre); color: var(--craie);
             font: 12px/1.3 var(--mono); padding: 4px 8px; border-radius: 3px; white-space: nowrap; }
.three-bar { position: absolute; left: 12px; right: 12px; bottom: 12px; z-index: 2; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.seg { display: flex; background: rgba(247, 246, 243, 0.92); border-radius: 4px; padding: 3px; }
.seg button { border: 0; background: transparent; padding: 5px 10px; border-radius: 3px; font-size: 12px; cursor: pointer; color: var(--gris); }
.seg button[aria-checked="true"] { background: var(--blanc); color: var(--encre); box-shadow: 0 0 0 1px var(--filet); }
.explode { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; color: var(--gris); background: rgba(247, 246, 243, 0.92); border-radius: 4px; padding: 5px 10px; }
.explode input { width: 140px; accent-color: var(--violet); }
.three-info { font-size: 12px; color: var(--gris); margin-left: auto; }
.stage .still { object-fit: contain; padding: 24px; }
.stage-tabs { position: absolute; top: 12px; left: 12px; display: flex; gap: 4px; z-index: 2;
              background: rgba(247, 246, 243, 0.9); border-radius: 4px; padding: 3px; }
.stage-tabs button { border: 0; background: transparent; padding: 5px 10px; border-radius: 3px; font-size: 12px; cursor: pointer; color: var(--gris); }
.stage-tabs button[aria-pressed="true"] { background: var(--blanc); color: var(--encre); box-shadow: 0 0 0 1px var(--filet); }
.stage-hint { position: absolute; bottom: 10px; left: 12px; font-size: 12px; color: var(--gris); }
.obj-info h1 { font-size: clamp(28px, 3vw, 40px); font-weight: 300; line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 8px; }
.obj-info .sub { color: var(--gris); margin: 0 0 24px; font-size: 15px; }
.facts { width: 100%; border-collapse: collapse; font-size: 14px; }
.facts th { font-weight: 400; color: var(--gris); text-align: left; width: 34%; padding: 9px 12px 9px 0; vertical-align: top; }
.facts td { padding: 9px 0; vertical-align: top; overflow-wrap: anywhere; }
.facts tr { border-bottom: 1px solid var(--filet); }
.facts .mono { font-family: var(--mono); font-size: 12.5px; }
.pending { color: var(--orange-texte); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.btn { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--filet); background: var(--blanc);
       border-radius: var(--rayon); padding: 8px 14px; font-size: 13px; color: var(--encre); cursor: pointer; }
.btn:hover { border-color: var(--encre); text-decoration: none; }
.btn.primary { background: var(--encre); color: var(--craie); border-color: var(--encre); }
.btn svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.program { margin-top: 40px; }
.program-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.program-head h2 { font-size: 24px; font-weight: 400; margin: 0; }
.program-head .lines { color: var(--gris); font-size: 14px; }
.code { position: relative; background: var(--code-bg); border: 1px solid var(--filet); border-radius: var(--rayon); }
.code pre { margin: 0; padding: 20px 0; overflow: auto; max-height: 72vh; font: 13px/1.6 var(--mono); counter-reset: ln; }
.code code { display: block; }
.code .ln { display: block; padding: 0 24px 0 0; }
.code .ln::before { counter-increment: ln; content: counter(ln); display: inline-block; width: 52px; padding-right: 16px;
                    text-align: right; color: #B4B0BA; user-select: none; }
.code .copy { position: absolute; top: 10px; right: 10px; z-index: 2; }
.code .copy.done { border-color: var(--violet); color: var(--violet); }
/* highlight.js in the charter: violet keywords, orange/coral (text shades) for literals, grey comments */
.hljs-keyword, .hljs-built_in, .hljs-literal { color: var(--violet); }
.hljs-string { color: var(--orange-texte); }
.hljs-number { color: var(--corail-texte); }
.hljs-comment { color: var(--gris); font-style: normal; }
.hljs-title.function_, .hljs-title { color: var(--encre); font-weight: 500; }
.hljs-params { color: var(--encre); }
.hljs-meta { color: var(--gris); }
.s3d { color: #4A2A9E; }

.similar { margin-top: 48px; }
.similar h2 { font-size: 24px; font-weight: 400; margin: 0 0 4px; }
.similar p { color: var(--gris); margin: 0 0 16px; font-size: 14px; }
.similar .grid { padding: 0; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.similar .card .body { padding: 8px 10px 10px; }
.similar .card .name { font-size: 13px; }

/* ---------------------------------------------------------------- loading, footer */
.loading { position: fixed; inset: 0; background: rgba(247, 246, 243, 0.96); display: grid; place-items: center; z-index: 20; }
.loading-box { width: min(360px, 80vw); }
.loading-mark { width: 28px; height: 28px; margin-bottom: 20px; }
#loading-stage { margin: 0 0 12px; font-size: 15px; }
.loading-bar { height: 2px; background: var(--filet); overflow: hidden; }
.loading-bar div { height: 100%; width: 30%; background: var(--encre); animation: slide 1.4s infinite ease-in-out; }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(340%); } }
.foot { display: flex; align-items: center; gap: 16px; padding: 28px var(--marge); border-top: 1px solid var(--filet); color: var(--gris); font-size: 13px; }
.foot p { margin: 0; }
.foot-mark { width: 20px; height: 20px; }
.foot-links { margin-left: auto !important; }

@media (max-width: 760px) {
  .ilabel { display: none; }
  .product { display: none; }
  .toolbar { position: static; }      /* on a phone only the header stays: the toolbar would take a third of the screen */
}
@media (max-width: 900px) {
  .hero, .obj-head { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .search { flex-wrap: wrap; }
  .mode { width: 100%; }
  .mode button { flex: 1; }
}