/* Site photo — recette UX · clair-obscur sur noir */
:root{
  --bg:#070707;
  --bg2:#0c0b0a;
  --ink:#cfcabf;
  --ink-dim:#7d786e;
  --warm:#d9a441;
  --warm-soft:rgba(217,164,65,.16);
  --serif:'Cormorant Garamond', 'Cormorant', Georgia, 'Times New Roman', serif;
  --sans:'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);
  font-family:var(--sans);overflow:hidden;-webkit-font-smoothing:antialiased}
body{position:fixed;inset:0}

/* ---------- HUD discret ---------- */
#hud{position:fixed;z-index:40;top:0;left:0;right:0;display:flex;
  align-items:center;gap:18px;padding:18px 22px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  transition:opacity .6s ease;mix-blend-mode:difference}
#hud.idle{opacity:.12}
#hud .brand{font-family:var(--serif);font-size:17px;letter-spacing:.04em;
  text-transform:none;color:var(--ink);opacity:.9}
#modes{display:flex;gap:2px;margin-left:auto}
#modes button,.gaze-btn{background:transparent;border:1px solid transparent;
  color:var(--ink-dim);font:inherit;letter-spacing:.14em;text-transform:uppercase;
  padding:7px 13px;cursor:pointer;transition:color .3s,border-color .3s}
#modes button:hover,.gaze-btn:hover{color:var(--ink)}
#modes button.on{color:var(--warm);border-color:rgba(217,164,65,.35)}
.gaze-btn{margin-left:6px;border:1px solid rgba(255,255,255,.12);border-radius:2px}
.gaze-btn.on{color:#0a0a0a;background:var(--warm);border-color:var(--warm)}
.gaze-btn.hidden{display:none}

/* ---------- scènes ---------- */
.scene{position:fixed;inset:0;z-index:10;opacity:0;pointer-events:none;
  transition:opacity .8s ease}
.scene.active{opacity:1;pointer-events:auto}

/* ① TRAVELLING */
#sc-travel{cursor:grab}
#sc-travel.drag{cursor:grabbing}
#travel-rail{position:absolute;top:0;height:100%;left:0;display:flex;align-items:center;
  will-change:transform}
.station{position:relative;flex:0 0 auto;height:100%;display:flex;align-items:center;
  justify-content:center;padding:0 7vw}
.station figure{margin:0;position:relative;transition:none}
.station img{display:block;max-height:74vh;max-width:62vw;object-fit:contain;
  box-shadow:0 30px 90px rgba(0,0,0,.8);will-change:opacity,transform}
.station .halo{position:absolute;inset:-12% -10%;z-index:-1;border-radius:50%;
  background:radial-gradient(ellipse at center,var(--warm-soft),transparent 62%);
  filter:blur(28px);opacity:0}
.travel-hint{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-dim);
  z-index:20;pointer-events:none}

/* ② FAISCEAU */
#sc-beam{background:#040404}
#beam-bg{position:absolute;inset:0;background-size:cover;background-position:center;
  filter:blur(44px) brightness(.32) saturate(1.1);transform:scale(1.1)}
#beam-photo{position:absolute;inset:0;background-size:contain;background-position:center;
  background-repeat:no-repeat;filter:saturate(1.02)}
#beam-veil{position:absolute;inset:0;background:#040404;
  -webkit-mask-image:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     rgba(0,0,0,0) 0, rgba(0,0,0,0) var(--br,12%), rgba(0,0,0,.6) calc(var(--br,12%) + 13%), #000 calc(var(--br,12%) + 30%));
          mask-image:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     rgba(0,0,0,0) 0, rgba(0,0,0,0) var(--br,12%), rgba(0,0,0,.6) calc(var(--br,12%) + 13%), #000 calc(var(--br,12%) + 30%));
  transition:none}
#beam-glow{position:absolute;inset:0;pointer-events:none;mix-blend-mode:screen;
  background:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     var(--warm-soft) 0, transparent 16%)}
#beam-cap{position:fixed;left:50%;bottom:46px;transform:translateX(-50%);z-index:20;
  font-family:var(--serif);font-size:19px;letter-spacing:.02em;color:var(--ink);
  opacity:.0;transition:opacity .8s;text-shadow:0 2px 30px #000;pointer-events:none}
#beam.show-cap #beam-cap{opacity:.85}
.beam-hint{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:20;
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-dim);
  pointer-events:none}

/* ③ SÉQUENCE */
#sc-seq{background:#050505;display:flex;align-items:center;justify-content:center}
#seq-img{max-height:84vh;max-width:84vw;object-fit:contain;opacity:0;
  transform:scale(1.02);transition:opacity 1.4s ease, transform 7s ease;
  box-shadow:0 40px 120px rgba(0,0,0,.85)}
#seq-img.in{opacity:1;transform:scale(1.07)}
#seq-cap{position:fixed;left:0;right:0;bottom:8vh;text-align:center;z-index:20;
  font-family:var(--serif);font-style:italic;font-size:clamp(18px,2.4vw,30px);
  color:var(--ink);opacity:0;transition:opacity 1.6s ease;letter-spacing:.01em;
  text-shadow:0 2px 40px #000;pointer-events:none}
#seq-cap.in{opacity:.82}
#seq-num{position:fixed;top:46%;left:50%;transform:translate(-50%,-50%);z-index:5;
  font-family:var(--serif);font-size:13vw;color:rgba(255,255,255,.025);
  pointer-events:none;user-select:none}
#seq-controls{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);z-index:25;
  display:flex;gap:20px;align-items:center;font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-dim);transition:opacity .5s}
#seq-controls button{background:none;border:none;color:var(--ink-dim);font:inherit;
  letter-spacing:.18em;cursor:pointer;padding:6px}
#seq-controls button:hover{color:var(--ink)}
#seq-dots{display:flex;gap:5px}
#seq-dots i{width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.18);
  display:block;transition:background .3s,transform .3s}
#seq-dots i.on{background:var(--warm);transform:scale(1.5)}

/* ---------- audio-guide : contrôles + narration ---------- */
#guideCtl{display:flex;align-items:center;gap:10px}
#guideCtl.hidden{display:none}
#guideMode.seg{display:flex;border:1px solid rgba(255,255,255,.14);border-radius:2px;overflow:hidden}
#guideMode button{background:transparent;border:none;color:var(--ink-dim);font:inherit;
  letter-spacing:.12em;text-transform:uppercase;font-size:11px;padding:6px 11px;cursor:pointer;
  transition:color .25s,background .25s}
#guideMode button:hover{color:var(--ink)}
#guideMode button.on{color:#0a0a0a;background:var(--warm)}

/* narration : texte serif, centré bas, fondu doux */
#guideText{position:fixed;left:50%;bottom:8vh;transform:translateX(-50%);z-index:25;
  max-width:min(760px,86vw);text-align:center;font-family:var(--serif);
  font-size:clamp(18px,2.3vw,27px);line-height:1.5;color:var(--ink);letter-spacing:.01em;
  opacity:0;transition:opacity .8s ease;text-shadow:0 2px 40px #000,0 0 14px #000;pointer-events:none}
#guideText.show{opacity:.92}

/* acquérir : émerge en fin de guide, discret */
#guideAcquire{position:fixed;left:50%;bottom:36px;transform:translateX(-50%) translateY(8px);z-index:26;
  background:transparent;border:1px solid rgba(217,164,65,.5);color:var(--warm);font:inherit;
  letter-spacing:.18em;text-transform:uppercase;font-size:12px;padding:11px 22px;border-radius:2px;
  cursor:pointer;opacity:0;pointer-events:none;transition:opacity .8s ease,transform .8s ease}
#guideAcquire.show{opacity:1;transform:translateX(-50%) translateY(0);pointer-events:auto}
#guideAcquire:hover{background:var(--warm);color:#0a0a0a}

/* ---------- banc regard : contrôles HUD ---------- */
#gazeCtl{display:flex;align-items:center;gap:8px}
#gazeCtl.hidden{display:none}
#gazeTool{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
#gazeTool .fam{display:flex;align-items:center;gap:2px}
#gazeTool .famlbl{color:var(--ink-dim);font-size:9px;letter-spacing:.14em;text-transform:uppercase;
  margin-right:3px;opacity:.65}
#gazeTool button{background:transparent;border:1px solid rgba(255,255,255,.12);border-radius:2px;
  color:var(--ink-dim);font:inherit;letter-spacing:.1em;text-transform:uppercase;font-size:10px;
  padding:5px 8px;cursor:pointer;transition:color .25s,background .25s,border-color .25s}
#gazeTool button:hover{color:var(--ink)}
#gazeTool button.on{color:#0a0a0a;background:var(--warm);border-color:var(--warm)}
.tgl.hidden{display:none}
.tgl{background:transparent;border:1px solid rgba(255,255,255,.12);border-radius:2px;
  color:var(--ink-dim);font:inherit;letter-spacing:.12em;text-transform:uppercase;
  font-size:11px;padding:6px 10px;cursor:pointer;transition:color .25s,border-color .25s}
.tgl:hover{color:var(--ink)}
.tgl.on{color:var(--warm);border-color:rgba(217,164,65,.5)}

/* faisceau grossier = halo plus large (la lumière éclaire une zone, pas un point) */
#beam.gaze-coarse #beam-veil{
  -webkit-mask-image:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     rgba(0,0,0,0) 0, rgba(0,0,0,0) 17%, rgba(0,0,0,.55) 36%, #000 58%);
          mask-image:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     rgba(0,0,0,0) 0, rgba(0,0,0,0) 17%, rgba(0,0,0,.55) 36%, #000 58%)}
#beam.gaze-coarse #beam-glow{background:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     var(--warm-soft) 0, transparent 24%)}

/* paume ouverte = révéler large (montrer toute l'œuvre un instant) */
#beam.gaze-reveal #beam-veil{
  -webkit-mask-image:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     rgba(0,0,0,0) 0, rgba(0,0,0,0) 30%, rgba(0,0,0,.4) 56%, rgba(0,0,0,.92) 86%);
          mask-image:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     rgba(0,0,0,0) 0, rgba(0,0,0,0) 30%, rgba(0,0,0,.4) 56%, rgba(0,0,0,.92) 86%)}
#beam.gaze-reveal #beam-glow{background:radial-gradient(circle at var(--mx,50%) var(--my,50%),
     var(--warm-soft) 0, transparent 42%)}

/* ---------- banc regard : overlay métriques (debug) ---------- */
#gazeOverlay{position:fixed;top:64px;right:18px;z-index:55;min-width:152px;
  background:rgba(6,6,6,.82);border:1px solid rgba(255,255,255,.1);border-radius:4px;
  padding:10px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;
  color:var(--ink);display:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
#gazeOverlay.show{display:block}
#gazeOverlay .row{display:flex;justify-content:space-between;gap:14px;padding:2px 0}
#gazeOverlay .row span{color:var(--ink-dim);text-transform:uppercase;letter-spacing:.08em}
#gazeOverlay .row b{color:var(--warm);font-weight:500}
#gazeOverlay .hint{margin-top:8px;padding-top:8px;border-top:1px solid rgba(255,255,255,.08);
  color:var(--ink-dim);font-family:var(--sans);font-size:10px;line-height:1.5;max-width:170px}

/* message flash (caméra indisponible, contexte non sécurisé, etc.) */
#gazeMsg{position:fixed;bottom:64px;left:50%;transform:translateX(-50%) translateY(8px);z-index:65;
  background:rgba(6,6,6,.9);border:1px solid rgba(217,164,65,.4);border-radius:3px;
  color:var(--ink);font-size:12px;padding:10px 16px;max-width:80vw;text-align:center;
  opacity:0;pointer-events:none;transition:opacity .3s,transform .3s}
#gazeMsg.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- grain + loader ---------- */
#grain{position:fixed;inset:0;z-index:50;pointer-events:none;opacity:.05;
  mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
#vignette{position:fixed;inset:0;z-index:30;pointer-events:none;
  background:radial-gradient(ellipse at center,transparent 55%,rgba(0,0,0,.55) 100%)}
#loader{position:fixed;inset:0;z-index:70;background:var(--bg);display:flex;
  align-items:center;justify-content:center;flex-direction:column;gap:18px;
  transition:opacity .8s}
#loader.gone{opacity:0;pointer-events:none}
#loader .lname{font-family:var(--serif);font-size:30px;letter-spacing:.03em}
#loader .bar{width:160px;height:1px;background:rgba(255,255,255,.12);position:relative;overflow:hidden}
#loader .bar i{position:absolute;left:0;top:0;height:100%;width:0;background:var(--warm)}