/* ============================================================
   CutList Optimizer v2 — "CNC workbench" theme
   Deep graphite-blue shell, drafting-blue accents, parts
   color-coded like a nesting package. Chakra Petch display,
   IBM Plex Mono for every number.
   ============================================================ */

:root {
  --bg: #0F151C;
  --bg-raise: #161E27;
  --bg-panel: #1B2530;
  --line: #2A3644;
  --line-soft: #222D39;
  --text: #E8EDF2;
  --text-dim: #8FA0B0;
  --blue: #4D8DFF;
  --blue-dim: #2C4E85;
  --amber: #E8B15C;
  --red: #E06A55;
  --green: #7FBF7F;

  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --display: "Chakra Petch", sans-serif;
  --sans: ui-sans-serif, system-ui, "Segoe UI", sans-serif;

  --radius: 8px;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; margin: 0; }

html, body { height: 100%; }
body {
  font-family: var(--sans);
  font-size: 15px;
  background: var(--bg);
  color: var(--text);
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

::selection { background: var(--blue-dim); }

/* ---------------- App shell ---------------- */
.shell {
  display: grid;
  grid-template-rows: 56px 1fr;
  grid-template-columns: 380px 1fr;
  grid-template-areas: "top top" "rail work";
  height: 100vh;
}
@media (max-width: 960px) {
  .shell {
    grid-template-rows: 56px auto 1fr;
    grid-template-columns: 1fr;
    grid-template-areas: "top" "rail" "work";
    height: auto;
    min-height: 100vh;
  }
}

/* ---------------- Top bar ---------------- */
.topbar {
  grid-area: top;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  background: var(--bg-raise);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 30;
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  display: flex; align-items: center; gap: 10px;
}
.brand .mark {
  width: 26px; height: 26px;
  border: 2px solid var(--blue);
  border-radius: 4px;
  position: relative;
  flex: none;
}
.brand .mark::before, .brand .mark::after {
  content: ""; position: absolute; background: var(--blue);
}
.brand .mark::before { left: 55%; top: 0; bottom: 0; width: 2px; }
.brand .mark::after { top: 45%; left: 0; right: 45%; height: 2px; }
.brand em { color: var(--blue); font-style: normal; }
.topbar .status {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
}
.topbar .spacer { margin-left: auto; }
.topbar .gh {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color .15s, border-color .15s;
}
.topbar .gh:hover { color: var(--text); border-color: var(--text-dim); }

/* ---------------- Input rail ---------------- */
.rail {
  grid-area: rail;
  background: var(--bg-raise);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  padding: 20px;
}
@media (max-width: 960px) { .rail { border-right: 0; border-bottom: 1px solid var(--line); } }

.group { margin-bottom: 26px; }
.group-title {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.group-title::after { content: ""; flex: 1; height: 1px; background: var(--line-soft); }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
label {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
}
input[type="number"], input[type="text"] {
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 11px;
  width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
input:hover { border-color: #3A4A5C; }
input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(77,141,255,0.18);
}
input::placeholder { color: #4E5E6F; }
/* kill number spinners for cleaner mono fields */
input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; }
input[type=number] { -moz-appearance: textfield; appearance: textfield; }

.switch-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px 0 0;
  font-size: 0.85rem; color: var(--text);
}
.switch { position: relative; width: 40px; height: 22px; flex: none; }
.switch input { position: absolute; opacity: 0; inset: 0; cursor: pointer; z-index: 2; width: 100%; height: 100%; }
.switch .track {
  position: absolute; inset: 0;
  background: var(--line);
  border-radius: 999px;
  transition: background .15s;
}
.switch .track::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--text-dim);
  transition: transform .15s, background .15s;
}
.switch input:checked + .track { background: var(--blue-dim); }
.switch input:checked + .track::after { transform: translateX(18px); background: var(--blue); }
.switch input:focus-visible + .track { box-shadow: 0 0 0 3px rgba(77,141,255,0.3); }
.hint { font-size: 0.72rem; color: var(--text-dim); margin-top: 4px; }

/* ---------------- Parts list ---------------- */
.parts-head {
  display: grid;
  grid-template-columns: 1fr 64px 64px 48px 26px;
  gap: 8px;
  padding: 0 2px 6px;
}
.parts-head span {
  font-family: var(--mono); font-size: 0.6rem;
  letter-spacing: 1px; text-transform: uppercase; color: var(--text-dim);
}
.part-row {
  display: grid;
  grid-template-columns: 1fr 64px 64px 48px 26px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
  animation: rowIn .2s ease both;
}
@keyframes rowIn { from { opacity: 0; transform: translateX(-6px); } to { opacity: 1; transform: none; } }
.part-row .swatch-input { position: relative; }
.part-row .swatch {
  position: absolute; left: 9px; top: 50%; transform: translateY(-50%);
  width: 10px; height: 10px; border-radius: 3px;
  pointer-events: none;
}
.part-row input { padding-left: 9px; padding-right: 6px; font-size: 0.8rem; }
.part-row .p-label { padding-left: 27px; }
.row-del {
  background: none; border: none; cursor: pointer;
  color: var(--text-dim); font-size: 0.95rem; line-height: 1;
  width: 26px; height: 30px; border-radius: 6px;
  transition: color .15s, background .15s;
}
.row-del:hover { color: var(--red); background: rgba(224,106,85,0.12); }

.btn {
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 14px;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
}
.btn:hover { border-color: #3E5169; }
.btn:active { transform: scale(0.985); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(77,141,255,0.3); }
.btn-dashed { width: 100%; border-style: dashed; color: var(--text-dim); background: transparent; }
.btn-dashed:hover { color: var(--text); }
.btn-primary {
  width: 100%;
  background: var(--blue);
  border-color: var(--blue);
  color: #0B1220;
  font-size: 0.86rem;
  padding: 14px;
  margin-top: 14px;
  box-shadow: 0 6px 18px rgba(77,141,255,0.25);
}
.btn-primary:hover { background: #6BA0FF; border-color: #6BA0FF; }
.btn-demo { background: transparent; }
.kbd {
  font-family: var(--mono); font-size: 0.62rem;
  border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 4px; padding: 1px 5px; color: var(--text-dim);
  margin-left: 6px;
}

/* ---------------- Work area ---------------- */
.work {
  grid-area: work;
  overflow-y: auto;
  padding: 24px 28px 80px;
}

/* Empty state */
.empty {
  height: 100%;
  min-height: 420px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 18px;
  color: var(--text-dim);
  text-align: center;
}
.empty .ghost-sheet {
  width: 220px; height: 120px;
  border: 1.5px dashed var(--line);
  border-radius: 6px;
  position: relative;
  background:
    linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0/22px 22px,
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px) 0 0/22px 22px;
}
.empty .ghost-sheet::before {
  content: ""; position: absolute; left: 12px; top: 12px;
  width: 90px; height: 52px; border-radius: 3px;
  background: rgba(77,141,255,0.16);
  border: 1px solid var(--blue-dim);
}
.empty .ghost-sheet::after {
  content: ""; position: absolute; left: 110px; top: 12px;
  width: 56px; height: 52px; border-radius: 3px;
  background: rgba(232,177,92,0.14);
  border: 1px solid rgba(232,177,92,0.35);
}
.empty p { font-size: 0.9rem; max-width: 320px; line-height: 1.55; }
.empty strong { color: var(--text); }

/* Warnings */
.warn {
  background: rgba(224,106,85,0.1);
  border: 1px solid rgba(224,106,85,0.4);
  color: #F0A093;
  font-family: var(--mono); font-size: 0.76rem;
  border-radius: var(--radius);
  padding: 11px 14px;
  margin-bottom: 18px;
}

/* Toolbar */
.toolbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-bottom: 18px;
}
.toolbar .right { margin-left: auto; display: flex; gap: 10px; }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
.stat {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  position: relative;
  overflow: hidden;
}
.stat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--line);
}
.stat.blue::before { background: var(--blue); }
.stat.red::before { background: var(--red); }
.stat.green::before { background: var(--green); }
.stat .k {
  font-family: var(--mono); font-size: 0.62rem;
  letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--text-dim);
}
.stat .v {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.65rem;
  margin-top: 6px;
  font-variant-numeric: tabular-nums;
}
.stat .v small { font-family: var(--mono); font-size: 0.72rem; color: var(--text-dim); font-weight: 400; }
.stat.blue .v { color: var(--blue); }
.stat.red .v { color: var(--red); }
.stat.green .v { color: var(--green); }

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
}
.panel-head h2 {
  font-family: var(--mono);
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 1.6px; text-transform: uppercase;
}
.panel-head .meta { font-family: var(--mono); font-size: 0.68rem; color: var(--text-dim); }
.panel-body { padding: 16px; }

/* Charts */
.charts { display: grid; grid-template-columns: 250px 1fr; gap: 18px; align-items: center; }
@media (max-width: 700px) { .charts { grid-template-columns: 1fr; } }
.chart-box { position: relative; height: 210px; }

/* Sheet cards */
.sheet-canvas-wrap { padding: 18px; overflow-x: auto; position: relative; }
canvas.sheet { display: block; max-width: 100%; height: auto; cursor: crosshair; }
.tip {
  position: fixed; z-index: 50;
  pointer-events: none;
  background: var(--bg);
  border: 1px solid var(--blue);
  border-radius: 6px;
  padding: 7px 10px;
  font-family: var(--mono); font-size: 0.7rem;
  color: var(--text);
  box-shadow: var(--shadow);
  transform: translate(12px, 12px);
  white-space: nowrap;
}
.tip .dim { color: var(--text-dim); }

/* Cut table */
.cutlist-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 0.74rem; }
.cutlist-table th, .cutlist-table td { padding: 6px 10px; text-align: left; }
.cutlist-table th {
  font-size: 0.6rem; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
}
.cutlist-table tbody tr { border-bottom: 1px solid var(--line-soft); cursor: default; transition: background .1s; }
.cutlist-table tbody tr:hover, .cutlist-table tbody tr.hl { background: rgba(77,141,255,0.10); }
.cutlist-table .chip {
  display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 8px;
  vertical-align: -1px;
}
.cutlist-table .rot { color: var(--blue); font-weight: 600; }

/* Print */
@media print {
  body { background: #fff; color: #000; }
  .topbar, .rail, .toolbar { display: none !important; }
  .shell { display: block; }
  .work { padding: 0; overflow: visible; }
  .panel, .stat { box-shadow: none; border-color: #999; background: #fff; }
  .stat .v { color: #000 !important; }
}

/* DigiStep link + hidden-state fix */
.topbar .gh.digi { color: var(--blue); border-color: var(--blue-dim); }
.topbar .gh.digi:hover { border-color: var(--blue); }
.empty[hidden] { display: none !important; }