:root {
  /* identità "arc-in-the-shop" — allineata al sito (site/site.css) */
  --bg: #0b0e13;          /* acciaio blu-nero */
  --panel: #10151d;
  --panel2: #19222d;
  --border: #26333f;      /* hairline cyan-biased */
  --border-soft: #1a232e;
  --text: #e6edf3;
  --muted: #90a3b6;       /* cyan-grey */
  --accent: #3cc9de;      /* cyan arco */
  --accent-deep: #1c8394;
  --warn: #f5822a;        /* ember caldo */
  --good: #46c98b;
  --sel: #ffffff;
  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(900px 380px at 82% -10%, rgba(60,201,222,.07), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 13px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ---------- barra superiore ---------- */
#topbar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  background: linear-gradient(180deg, var(--panel), var(--bg));
  border-bottom: 1px solid var(--border-soft);
  flex: 0 0 auto;
  flex-wrap: wrap;
}
.brand { font-size: 14px; margin-right: 4px; white-space: nowrap; display: inline-flex; align-items: center; gap: 9px; font-weight: 700; letter-spacing: -.01em; }
.brand b { color: var(--text); }
.brand .spark {
  width: 11px; height: 11px; border-radius: 3px; flex: none;
  background: radial-gradient(circle at 50% 40%, #fff, var(--accent) 45%, var(--accent-deep) 100%);
  box-shadow: 0 0 12px 1px rgba(60,201,222,.65);
}
.brand .phase {
  margin-left: 2px; font-size: 10px; text-transform: uppercase; letter-spacing: .1em;
  color: var(--muted); font-family: var(--mono);
  border: 1px solid var(--border); border-radius: 999px; padding: 2px 9px;
}
button, select {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 11px;
  font: inherit;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
}
button:hover { border-color: var(--accent); transform: translateY(-1px); }
button:active { transform: translateY(0); }
button.active, .seg-btns button.active { background: color-mix(in srgb, var(--accent) 22%, var(--panel2)); border-color: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button.toggle { opacity: .55; }
button.toggle.active { opacity: 1; }
.seg-btns { display: inline-flex; }
.seg-btns button { border-radius: 0; margin-left: -1px; padding: 5px 9px; }
.seg-btns button:first-child { border-radius: 6px 0 0 6px; }
.seg-btns button:last-child { border-radius: 0 6px 6px 0; }
.sep { width: 1px; height: 22px; background: var(--border); margin: 0 2px; }
.grow { flex: 1; }
.chk { display: inline-flex; align-items: center; gap: 5px; color: var(--muted); cursor: pointer; white-space: nowrap; }
.chk input { accent-color: var(--accent); }
#progress { width: 160px; accent-color: var(--accent); }
#btnPlay { width: 36px; }

/* ---------- gerarchia della toolbar (design skill) ---------- */
/* azioni di GENERAZIONE CAM: accent cyan = "crea qualcosa" (le azioni primarie) */
#btnDemoRotary, #btnCoping, #btnSheetCut, #btnDxfRotary, #btnMillPart, #btnGenNc {
  background: color-mix(in srgb, var(--accent) 12%, var(--panel2));
  border-color: color-mix(in srgb, var(--accent) 32%, var(--border));
  color: #dff6fb;
}
#btnDemoRotary:hover, #btnCoping:hover, #btnSheetCut:hover, #btnDxfRotary:hover, #btnMillPart:hover, #btnGenNc:hover {
  background: color-mix(in srgb, var(--accent) 22%, var(--panel2));
  border-color: var(--accent);
}
/* EXPORT: scarica il risultato → ember caldo ("porta a casa") */
#btnDlNc {
  background: color-mix(in srgb, var(--warn) 16%, var(--panel2));
  border-color: color-mix(in srgb, var(--warn) 40%, var(--border));
  color: #ffe7d1;
}
#btnDlNc:hover { background: color-mix(in srgb, var(--warn) 26%, var(--panel2)); border-color: var(--warn); }
/* PLAY: azione di simulazione, un filo più marcata */
#btnPlay {
  background: color-mix(in srgb, var(--accent) 14%, var(--panel2));
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
  color: #eaf9fc; font-size: 14px;
}
#btnPlay:hover { border-color: var(--accent); }
/* riga-arco sotto la barra + separatori sfumati (identità "arc-in-the-shop") */
#topbar { position: relative; row-gap: 6px; }
#topbar::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; pointer-events: none;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--accent) 45%, transparent) 28%, color-mix(in srgb, var(--warn) 30%, transparent) 72%, transparent);
}
.sep { background: linear-gradient(180deg, transparent, var(--border) 20%, var(--border) 80%, transparent); }

/* ---------- layout centrale ---------- */
main { flex: 1; display: flex; min-height: 0; }
.panel {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
#codePanel { width: 300px; flex: 0 0 auto; }
#infoPanel { width: 270px; flex: 0 0 auto; border-right: none; border-left: 1px solid var(--border); }
.panel.hidden { display: none; }
.panel-title {
  padding: 9px 13px; font-size: 10.5px; text-transform: uppercase; letter-spacing: .12em;
  color: var(--accent); font-family: var(--mono);
  border-bottom: 1px solid var(--border-soft); flex: 0 0 auto;
}

/* ---------- pannello codice ---------- */
#codeScroll { flex: 1; overflow: auto; position: relative; font: 12px/19px var(--mono); }
#codeSpacer { position: relative; }
#codeView { position: absolute; left: 0; right: 0; top: 0; }
.row { position: absolute; left: 0; right: 0; height: 19px; white-space: pre; display: flex; cursor: default; }
.row .ln {
  flex: 0 0 46px; text-align: right; padding-right: 8px; color: #4d5766;
  user-select: none; background: var(--panel);
}
.row .tx { color: #aab4c3; overflow: hidden; }
.row.geo { cursor: pointer; }
.row.geo .tx { color: var(--text); }
.row:hover { background: #1e242d; }
.row.act { background: #22303f; }
.row.sel { background: #2b425c; }
.row.sel .ln { color: var(--accent); }
.row.match { background: #3a3410; }
.row.match-cur { background: #6b5a12; }
/* riga in esecuzione durante la simulazione del percorso */
.row.run { background: #17372a; box-shadow: inset 3px 0 0 #43aa8b; }
.row.run .ln { color: #43aa8b; }

/* ---- evidenziazione sintassi G-code (stile NCnetic) ---- */
.t-g  { color: #ffd54a; }           /* G-code moto */
.t-m  { color: #ff8fb3; }           /* M-code */
.t-xyz{ color: #6fd3ff; }           /* coordinate X/Y/Z/I/J/K/R… */
.t-fs { color: #90be6d; }           /* F/S avanzamento/mandrino */
.t-tool{ color: #f8961e; }          /* T/D/H utensile */
.t-n  { color: #6b7686; }           /* N/O numeri riga/programma */
.t-cm { color: #5f7f5f; font-style: italic; }  /* commenti */

/* ---- barra di ricerca ---- */
#codeSearch {
  display: flex; align-items: center; gap: 4px; padding: 5px 8px;
  border-bottom: 1px solid var(--border); flex: 0 0 auto;
}
#codeSearch.hidden { display: none; }
#searchInput {
  flex: 1; min-width: 0; background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); border-radius: 5px; padding: 3px 7px; font: inherit;
}
#searchInput:focus { border-color: var(--accent); outline: none; }
#searchCount { font: 11px Consolas, monospace; color: var(--muted); min-width: 42px; text-align: right; }
#codeSearch button { padding: 2px 7px; }

/* ---------- viewport ---------- */
#viewport { flex: 1; position: relative; min-width: 0; background: var(--bg); }
#canvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: crosshair; display: block; }
#dropHint {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 8px;
  color: var(--muted); pointer-events: none; text-align: center;
}
#dropHint .big { font-size: 20px; }
#dropHint .big b { color: var(--accent); }
#dropHint.hidden { display: none; }
#viewport.dragging::after {
  content: "Rilascia per caricare";
  position: absolute; inset: 10px; border: 2px dashed var(--accent); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(76, 201, 240, .08); color: var(--accent); font-size: 18px;
  pointer-events: none;
}
#segTip {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%);
  background: var(--panel2); border: 1px solid var(--accent); border-radius: 8px;
  padding: 6px 12px; font: 12px Consolas, monospace; color: var(--text);
  box-shadow: 0 4px 16px rgba(0,0,0,.4); white-space: nowrap; z-index: 5;
}
#segTip .close { margin-left: 10px; cursor: pointer; color: var(--muted); }
#segTip .close:hover { color: #fff; }

/* ---------- pannello info ---------- */
#infoContent { flex: 1; overflow: auto; padding: 10px 12px; }
.info-sec { margin-bottom: 14px; }
.info-sec h3 {
  margin: 0 0 7px; font-size: 10.5px; text-transform: uppercase; letter-spacing: .1em;
  color: var(--accent); font-weight: 600; font-family: var(--mono);
}
.kv { display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; font-size: 12px; }
.kv .k { color: var(--muted); }
.kv .v { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.tool-row { display: flex; align-items: center; gap: 8px; padding: 3px 0; font-size: 12px; }
.tool-row input { accent-color: var(--accent); }
.tool-chip { width: 12px; height: 12px; border-radius: 3px; flex: 0 0 auto; }
.tool-row .cnt { margin-left: auto; color: var(--muted); font-family: Consolas, monospace; }
.warn-row {
  padding: 4px 6px; margin: 2px 0; font-size: 11px; border-left: 3px solid var(--warn);
  background: #221d14; border-radius: 0 4px 4px 0; cursor: pointer;
}
.warn-row:hover { background: #2a2318; }
.warn-row .wl { color: var(--warn); font-family: Consolas, monospace; margin-right: 6px; }
.empty-note { color: var(--muted); font-size: 12px; font-style: italic; }

/* ---------- barra di stato ---------- */
#statusbar {
  display: flex; gap: 18px; padding: 5px 14px;
  background: linear-gradient(0deg, var(--panel), var(--bg));
  border-top: 1px solid var(--border-soft);
  font: 12px var(--mono); color: var(--muted); flex: 0 0 auto;
}
#sbCoords { color: var(--text); min-width: 190px; }

/* ---------- toast ---------- */
#toast {
  position: fixed; bottom: 46px; left: 50%; transform: translateX(-50%);
  background: var(--panel2); border: 1px solid var(--warn); color: #ffd9b8;
  padding: 9px 18px; border-radius: 9px; z-index: 20; max-width: 72%;
  box-shadow: 0 10px 30px -12px #000; font-size: 12.5px;
}
#toast.ok { border-color: var(--good); color: #c6f0d8; }