/* Capture & Pin — one shared stage for all three steps.
   Palette merges the three studies: grayscale surfaces, one accent for keyboard focus. */
:root{
  --bg:#e9e9eb;
  --surface:#f6f6f7;
  --fg:#131315;
  --fg-2:#5e5e66;
  --line:rgba(19,19,21,.14);
  --wall:#f6f6f7;
  --wall-line:#e1e1e4;
  --dash:#9a9aa2;
  --shadow:rgba(0,0,0,.14);
  --pin:#3a3a40;
  --pin-hl:#c4c4ca;
  --btn-bg:#ffffff;
  --btn-border:#c9c9cf;
  --accent:#2f5fd0;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e0e10;--surface:#18181b;--fg:#f1f1f3;--fg-2:#a2a2aa;--line:rgba(241,241,243,.16);
    --wall:#18181b;--wall-line:#242428;--dash:#74747c;--shadow:rgba(0,0,0,.5);
    --pin:#d6d6dc;--pin-hl:#4a4a50;--btn-bg:#232327;--btn-border:#3a3a40;--accent:#8aa9f5;color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0e0e10;--surface:#18181b;--fg:#f1f1f3;--fg-2:#a2a2aa;--line:rgba(241,241,243,.16);
  --wall:#18181b;--wall-line:#242428;--dash:#74747c;--shadow:rgba(0,0,0,.5);
  --pin:#d6d6dc;--pin-hl:#4a4a50;--btn-bg:#232327;--btn-border:#3a3a40;--accent:#8aa9f5;color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  min-height:100vh;
  background:var(--bg);color:var(--fg);font:14px/1.5 var(--sans);
  padding-block:24px;
  padding-left:max(16px,env(safe-area-inset-left,0px));
  padding-right:max(16px,env(safe-area-inset-right,0px));
}
.wrap{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}
h1{margin:0;font-size:20px;font-weight:600;letter-spacing:-.01em}
.count{font-family:var(--mono);font-size:13px;color:var(--fg-2);font-variant-numeric:tabular-nums}

.stage{position:relative;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#000;outline:none}
.stage:focus-visible{box-shadow:0 0 0 3px var(--accent)}
.stage>svg{display:block;width:100%;height:auto;touch-action:none;user-select:none;-webkit-user-select:none}

.foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;min-height:36px}
.hud{margin:0;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-2);font-variant-numeric:tabular-nums}

.icon-btn{
  position:absolute;top:12px;left:12px;width:36px;height:36px;padding:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--btn-bg);color:var(--fg);border:1px solid var(--btn-border);border-radius:8px;cursor:pointer;
  box-shadow:0 1px 4px rgba(0,0,0,.25);
}
.icon-btn:hover{border-color:var(--fg-2)}
.icon-btn:active{transform:scale(.94)}
.icon-btn:focus-visible,.text-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.text-btn{
  font:500 14px var(--sans);padding:8px 14px;border-radius:8px;cursor:pointer;
  background:var(--fg);color:var(--bg);border:1px solid var(--fg);
}
.text-btn:hover{opacity:.88}

/* Step layers crossfade; a hidden layer takes no input */
.layer{transition:opacity .45s ease}
.layer.off{opacity:0;pointer-events:none}

/* Step 2 — camera overlay (white, like the Study 01 frame, so it reads on every scene) */
.brk{fill:none;stroke:#fff;stroke-opacity:.75}
.ring{fill:none;stroke:#fff;stroke-width:3}
.disc{fill:#fff}
.chk{fill:none;stroke:#131315;stroke-width:4;stroke-linecap:square;stroke-linejoin:miter;transition:opacity .2s}
.ping{fill:none;stroke:#fff;stroke-width:1.5;transform-box:fill-box;transform-origin:center;animation:ping 1.8s ease-out infinite}
@keyframes ping{from{transform:scale(1);opacity:.6}to{transform:scale(1.3);opacity:0}}
#br{transform-origin:340px 235px;transition:transform .25s ease-out}
#shutter{cursor:pointer;outline:none}
#shutter:focus-visible #hit{stroke:var(--accent);stroke-width:3}

/* Step 3 — wall */
.wall-fill{fill:var(--wall)}
.wall-line{stroke:var(--wall-line)}
.hand{fill:var(--fg)}
.hand-s{stroke:var(--fg)}
.shadow{fill:var(--shadow)}
.dash{stroke:var(--dash)}
.march{animation:m 1.2s linear infinite}
@keyframes m{to{stroke-dashoffset:-18}}
#held{outline:none}
#held:focus-visible #hs{stroke:var(--accent);stroke-width:3}

@media (prefers-reduced-motion:reduce){
  .ping{animation:none;opacity:.4}
  #br{transition:none}
  .march{animation:none}
  .layer{transition-duration:.15s}
}

/* Floating, collapsible background-controls panel (left side) */
.panel{
  position:fixed;z-index:10;top:16px;left:max(16px,env(safe-area-inset-left,0px));
  width:min(290px,calc(100vw - 32px));max-height:calc(100vh - 32px);
  display:flex;flex-direction:column;
  background:var(--surface);color:var(--fg);border:1px solid var(--line);border-radius:12px;
  box-shadow:0 6px 24px rgba(0,0,0,.18);font-size:13px;
}
.panel.collapsed{width:auto}
.ptoggle{
  display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;
  background:none;border:0;color:inherit;font:600 13px var(--sans);cursor:pointer;text-align:left;border-radius:12px;
}
.ptoggle::after{content:"";margin-left:auto;width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s}
.panel.collapsed .ptoggle::after{transform:rotate(-45deg)}
.ptoggle:focus-visible,.pbtn:focus-visible,.panel input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.pbody{overflow-y:auto;padding:0 12px 12px;border-top:1px solid var(--line)}
.pintro{margin:10px 0 4px;color:var(--fg-2);font-size:12px;line-height:1.4}
.pg{border:0;margin:0;padding:10px 0 4px;border-bottom:1px solid var(--line)}
.pg legend{padding:0;margin-bottom:4px;font:500 11px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--fg-2)}
.prow{display:flex;flex-direction:column;gap:2px;margin:6px 0}
.ptop{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.plab{font-weight:500}
.prow output{font:12px var(--mono);font-variant-numeric:tabular-nums;color:var(--fg)}
.pnote{font-size:11px;color:var(--fg-2);line-height:1.35}
.prow input[type=range]{width:100%;margin:2px 0;accent-color:var(--fg)}
.tog{flex-direction:row;align-items:center;gap:8px;cursor:pointer}
.tog input{accent-color:var(--fg);width:16px;height:16px;margin:0}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:4px;margin:2px 0}
.seg label{position:relative}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg span{display:block;padding:5px 6px;text-align:center;border:1px solid var(--btn-border);border-radius:6px;font-size:12px;background:var(--btn-bg)}
.seg input:checked+span{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.seg input:focus-visible+span{outline:2px solid var(--accent);outline-offset:1px}
.pactions{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:12px}
.pbtn{font:500 12px var(--sans);padding:7px 8px;border-radius:8px;cursor:pointer;background:var(--btn-bg);color:var(--fg);border:1px solid var(--btn-border)}
.pbtn:hover{border-color:var(--fg-2)}
.pbtn.primary{grid-column:1/-1;background:var(--fg);color:var(--bg);border-color:var(--fg)}
/* keep the stage clear of the panel: beside it on wide screens, below its tab on narrow ones */
@media (min-width:1100px){body.panel-open{padding-left:322px}}
@media (max-width:1099px){.wrap{padding-top:48px}}
.pcol{flex-direction:row;align-items:center;justify-content:space-between;cursor:pointer}
.pcv{display:flex;align-items:center;gap:8px}
.pcv output{font:12px var(--mono);color:var(--fg-2);text-transform:uppercase}
.pcol input[type=color]{width:36px;height:24px;padding:0 2px;border:1px solid var(--btn-border);border-radius:6px;background:var(--btn-bg);cursor:pointer}