html,body{margin:0}
[hidden]{display:none!important}

/* Mesa de corte: painel de controles à esquerda, prancha quadriculada à direita; empilha no celular */
:root{
  --mat:#f5f3ea; --grid:#e6e3d8; --panel:#fffff9; --ink:#120d10; --muted:#6b6267;
  --line:#e0dcd2; --accent:#db3114; --accent-ink:#fffff9; --chip:#f0eee5;
  --display:"Bricolage Grotesque", "Arial Black", system-ui, sans-serif;
  --body:"Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:"DM Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --mat:#120d10; --grid:#1f181c; --panel:#1a1418; --ink:#fffff9; --muted:#a69da2;
  --line:#2e252a; --accent:#db3114; --accent-ink:#fffff9; --chip:#241c21; color-scheme:dark}}
:root[data-theme="dark"]{
  --mat:#120d10; --grid:#1f181c; --panel:#1a1418; --ink:#fffff9; --muted:#a69da2;
  --line:#2e252a; --accent:#db3114; --accent-ink:#fffff9; --chip:#241c21; color-scheme:dark}
*{box-sizing:border-box}
html,body{height:100%}
body{background:var(--mat);color:var(--ink);font-family:var(--body);font-size:15px;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:20px}
.wrap{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:340px minmax(0,1fr);gap:20px;align-items:start}
@media (max-width:860px){.wrap{grid-template-columns:minmax(0,1fr)}.stage{order:-1}.board{min-height:220px;padding:16px}}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:20px;display:flex;flex-direction:column;gap:18px}
h1{font-family:var(--display);font-weight:800;font-size:30px;line-height:1;margin:0;letter-spacing:-.01em;text-wrap:balance}
.sub{color:var(--muted);margin:6px 0 0;line-height:1.45;font-size:14px}
label,.lab{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);display:flex;justify-content:space-between;gap:8px}
.field{display:flex;flex-direction:column;gap:7px}
textarea{width:100%;min-height:92px;resize:vertical;border:1px solid var(--line);border-radius:8px;background:var(--mat);color:var(--ink);
  font:500 16px/1.35 var(--body);padding:10px 12px}
textarea:focus-visible,input:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input[type=range]{width:100%;accent-color:var(--accent)}
input[type=checkbox]{accent-color:var(--accent)}
.val{font-variant-numeric:tabular-nums;color:var(--ink)}
.seg{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg.three{grid-template-columns:repeat(3,1fr)}
.seg button{border:0;background:transparent;color:var(--ink);font:500 13px var(--body);padding:8px 4px;cursor:pointer;border-right:1px solid var(--line)}
.seg button:last-child{border-right:0}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--panel)}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.check{display:flex;gap:8px;align-items:center;font-size:14px;cursor:pointer}
input[type=color]{width:38px;height:30px;border:1px solid var(--line);border-radius:6px;background:none;padding:2px}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{border:1px solid var(--ink);background:var(--panel);color:var(--ink);font:600 14px var(--body);padding:10px 14px;border-radius:8px;cursor:pointer}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.stage{min-width:0;display:flex;flex-direction:column;gap:10px}
.board{position:relative;border-radius:10px;border:1px solid var(--line);min-height:360px;padding:28px;overflow:auto;
  background-color:var(--mat);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:24px 24px;display:flex;align-items:center;justify-content:center}
canvas{max-width:100%;height:auto;cursor:pointer;display:block}
.hint{font-family:var(--mono);font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.status{min-height:1.2em;font-size:13px;color:var(--muted)}
.note a{color:var(--accent)}
.note{font-size:13px;color:var(--muted);line-height:1.45;border-top:1px solid var(--line);padding-top:14px;margin:0}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}