:root {
  --is-dark: 0;
  --bg: #f4f2ee;
  --panel: #ffffff;
  --panel-2: #f8f7f4;
  --border: #e4e0d8;
  --border-strong: #cfc9be;
  --text: #1f1d1a;
  --muted: #6c675f;
  --faint: #9b958b;
  --accent: #d4622a;
  --accent-hover: #bb5320;
  --accent-soft: #fbeae0;
  --accent-text: #ffffff;
  --ok: #2f8a4e;
  --ok-soft: #e4f3e8;
  --warn: #a8701a;
  --warn-soft: #fbf0dc;
  --bad: #c2412d;
  --bad-soft: #fcebe7;
  --sheet: #efe3cc;
  --sheet-grain: rgba(140, 100, 50, 0.13);
  --sheet-edge: #7d6544;
  --offcut: #4f7d43;
  --offcut-fill: rgba(110, 160, 90, 0.16);
  --scrap: rgba(120, 110, 95, 0.45);
  --trim: rgba(120, 110, 95, 0.28);
  --cut: #d6361a;
  --dim: #4a4640;
  --shadow: 0 1px 2px rgba(30, 25, 15, 0.06), 0 1px 1px rgba(30, 25, 15, 0.03);
  --radius: 10px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --is-dark: 1;
    --bg: #171614;
    --panel: #201f1c;
    --panel-2: #292724;
    --border: #35322d;
    --border-strong: #4a463f;
    --text: #ece8e1;
    --muted: #a39d92;
    --faint: #7a746a;
    --accent: #e8743a;
    --accent-hover: #f0864f;
    --accent-soft: #3a2619;
    --accent-text: #1a1209;
    --ok: #5fbf7d;
    --ok-soft: #1d2f22;
    --warn: #e0a64a;
    --warn-soft: #34291a;
    --bad: #ef7a64;
    --bad-soft: #3a1f1a;
    --sheet: #3b3328;
    --sheet-grain: rgba(220, 180, 120, 0.08);
    --sheet-edge: #a88d64;
    --offcut: #8cc47a;
    --offcut-fill: rgba(120, 190, 100, 0.13);
    --scrap: rgba(200, 190, 170, 0.32);
    --trim: rgba(200, 190, 170, 0.22);
    --cut: #ff6a4a;
    --dim: #c9c3b8;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 var(--font);
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
svg { display: block; }

/* ── Top bar ───────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 16px; letter-spacing: -0.01em; }
.brand svg { width: 26px; height: 26px; }
.logo-board { fill: var(--sheet); stroke: var(--sheet-edge); stroke-width: 2; }
.logo-cut { stroke: var(--accent); stroke-width: 2.5; fill: none; }
.project-name {
  min-width: 0; width: 280px; max-width: 32vw;
  border: 1px solid transparent; border-radius: 7px;
  padding: 5px 8px; background: transparent; font-weight: 500; color: var(--muted);
}
.project-name:hover { border-color: var(--border); }
.project-name:focus { outline: none; border-color: var(--accent); color: var(--text); background: var(--panel); }
.spacer { flex: 1; }
.status { color: var(--muted); font-size: 12.5px; display: flex; align-items: center; gap: 7px; white-space: nowrap; }
.status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.status.busy .dot { background: var(--accent); animation: pulse 0.9s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.3; transform: scale(0.8); } }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 34px; padding: 0 12px;
  border: 1px solid var(--border-strong); border-radius: 8px;
  background: var(--panel); color: var(--text);
  font-weight: 550; cursor: pointer; white-space: nowrap;
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover { background: var(--panel-2); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
#btnOptimize svg, .btn-icon svg { fill: currentColor; stroke: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-small { height: 28px; padding: 0 10px; font-size: 13px; }
.btn-ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--text); background: var(--panel-2); }
.btn-icon { width: 34px; padding: 0; justify-content: center; }
.btn-group { display: flex; }
.btn-group .btn:first-child { border-radius: 8px 0 0 8px; }
.btn-group .btn:last-child { border-radius: 0 8px 8px 0; border-left-color: rgba(255, 255, 255, 0.35); }

.menu-wrap { position: relative; }
.menu {
  position: absolute; right: 0; top: calc(100% + 6px); min-width: 210px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15); padding: 5px; z-index: 30;
}
.menu button { display: block; width: 100%; text-align: left; padding: 8px 10px; border: 0; border-radius: 6px; background: none; cursor: pointer; }
.menu button:hover { background: var(--panel-2); }
.menu .danger { color: var(--bad); }
.menu hr { border: 0; border-top: 1px solid var(--border); margin: 5px 0; }

/* ── Layout ───────────────────────────────────────── */
.layout { display: grid; grid-template-columns: 430px minmax(0, 1fr); align-items: start; }
.sidebar {
  position: sticky; top: 55px; height: calc(100vh - 55px); overflow-y: auto;
  padding: 14px; display: flex; flex-direction: column; gap: 12px;
  border-right: 1px solid var(--border);
}
.main { padding: 16px 20px 40px; display: flex; flex-direction: column; gap: 16px; min-width: 0; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.panel h2 { margin: 0; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.count { font-weight: 600; color: var(--faint); letter-spacing: 0; text-transform: none; margin-left: 4px; }
.hint { margin: 8px 0 0; font-size: 12px; color: var(--faint); }
.empty { margin: 10px 0 2px; color: var(--faint); font-size: 13px; text-align: center; }

/* ── Inputs ───────────────────────────────────────── */
input[type="text"], select, textarea {
  width: 100%; min-width: 0; height: 32px; padding: 0 8px;
  border: 1px solid var(--border-strong); border-radius: 7px; background: var(--panel);
}
textarea { height: auto; padding: 7px 8px; resize: vertical; font-size: 13px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
input.num { text-align: right; font-variant-numeric: tabular-nums; }
input.invalid { border-color: var(--bad); background: var(--bad-soft); }
input::placeholder, textarea::placeholder { color: var(--faint); }

.grid-head { display: grid; gap: 5px; font-size: 11.5px; color: var(--faint); font-weight: 600; padding: 0 0 4px; }
.grid-head span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.grain-ico { font-style: normal; color: var(--accent); }
.rows { display: flex; flex-direction: column; gap: 5px; }
.row { display: grid; gap: 5px; align-items: center; }
.row input { height: 30px; padding: 0 6px; font-size: 13.5px; }

.stock-grid { grid-template-columns: minmax(0, 1fr) 66px 66px 44px 78px 24px; }
.part-grid { grid-template-columns: 14px minmax(0, 1fr) 62px 62px 44px 46px 24px; }
.grid-head.part-grid span:nth-child(n+3):nth-child(-n+6) { text-align: right; }
.grid-head.stock-grid span:nth-child(n+2):nth-child(-n+5) { text-align: right; }

.del {
  width: 24px; height: 24px; border: 0; border-radius: 6px; background: none; color: var(--faint);
  cursor: pointer; display: grid; place-items: center; font-size: 16px; line-height: 1;
}
.del:hover { background: var(--bad-soft); color: var(--bad); }
.swatch { width: 14px; height: 14px; border-radius: 4px; border: 1px solid; }
.placed { font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); padding-right: 2px; }
.placed.ok { color: var(--ok); }
.placed.bad { color: var(--bad); font-weight: 700; }
.row.hl input { border-color: var(--accent); }

.settings { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; color: var(--muted); font-weight: 550; }
.field-wide { grid-column: 1 / -1; }
.label-row { display: flex; justify-content: space-between; }
.unit-label { color: var(--faint); font-weight: 500; }
.kerf-row { display: grid; grid-template-columns: 1fr 76px; gap: 10px; align-items: center; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

.toggles { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.switch { display: grid; grid-template-columns: 36px 1fr; gap: 10px; align-items: start; cursor: pointer; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track { width: 36px; height: 21px; border-radius: 11px; background: var(--border-strong); position: relative; transition: background 0.15s; margin-top: 1px; }
.switch .thumb { position: absolute; top: 2px; left: 2px; width: 17px; height: 17px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25); transition: transform 0.15s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track .thumb { transform: translateX(15px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }
.switch b { display: block; font-weight: 600; font-size: 13.5px; }
.switch small { display: block; color: var(--faint); font-size: 12px; }

.add-form { display: grid; grid-template-columns: minmax(0, 1fr) 66px 12px 66px 46px auto; gap: 5px; align-items: center; margin-bottom: 10px; padding: 8px; border-radius: 9px; background: var(--panel-2); border: 1px dashed var(--border-strong); }
.add-form .times { color: var(--faint); text-align: center; }
.btn-add { height: 32px; }
.paste-box { margin-bottom: 10px; }
.paste-actions { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 6px; }
.paste-actions .hint { margin: 0; }

/* ── Summary cards ───────────────────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 11px 13px; box-shadow: var(--shadow); min-width: 0; }
.card .k { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 650; }
.card .v { font-size: 23px; font-weight: 700; letter-spacing: -0.02em; margin-top: 2px; font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .v small { font-size: 14px; color: var(--muted); font-weight: 600; letter-spacing: 0; }
.card .s { font-size: 12px; color: var(--faint); margin-top: 1px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card.bad .v { color: var(--bad); }
.bar { height: 6px; border-radius: 3px; background: var(--panel-2); margin-top: 7px; overflow: hidden; display: flex; }
.bar i { display: block; height: 100%; }
.bar .b-used { background: var(--accent); }
.bar .b-off { background: var(--offcut); opacity: 0.7; }

/* ── Alerts ───────────────────────────────────────── */
.alert { border-radius: var(--radius); padding: 11px 14px; border: 1px solid; display: flex; gap: 10px; align-items: flex-start; }
.alert + .alert { margin-top: 8px; }
.alert.bad { background: var(--bad-soft); border-color: color-mix(in srgb, var(--bad) 35%, transparent); }
.alert.info { background: var(--panel); border-color: var(--border); color: var(--muted); }
.alert .ico { width: 20px; height: 20px; border-radius: 50%; background: var(--bad); color: #fff; font-weight: 800; display: grid; place-items: center; flex: 0 0 auto; font-size: 13px; }
.alert b { color: var(--bad); }
.alert ul { margin: 4px 0 0; padding-left: 18px; }
.alert li { margin: 1px 0; }
.alert .fix { margin-top: 6px; font-weight: 600; }

/* ── Sheets ───────────────────────────────────────── */
.sheets { display: flex; flex-direction: column; gap: 16px; }
.sheet-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.sheet-head { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.sheet-head h3 { margin: 0; font-size: 15px; font-weight: 700; }
.sheet-head .meta { color: var(--muted); font-size: 13px; display: flex; gap: 12px; flex-wrap: wrap; }
.sheet-head .meta span { white-space: nowrap; }
.sheet-head .actions { margin-left: auto; display: flex; gap: 4px; }
.pill { font-size: 11.5px; font-weight: 700; padding: 2px 8px; border-radius: 20px; }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }
.sheet-body { padding: 12px 14px 8px; }
.sheet-body canvas { display: block; width: 100%; cursor: crosshair; }
.sheet-foot { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 4px 16px; padding: 10px 14px 12px; border-top: 1px solid var(--border); background: var(--panel-2); font-size: 12.5px; }
.sheet-foot div { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); }
.sheet-foot b { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
.offcut-list { grid-column: 1 / -1; display: flex; gap: 5px; flex-wrap: wrap; align-items: center; margin-top: 4px; }
.offcut-list .chip { font-size: 12px; padding: 1px 7px; border-radius: 5px; background: var(--offcut-fill); color: var(--offcut); border: 1px dashed var(--offcut); font-variant-numeric: tabular-nums; }

.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--muted); padding: 0 2px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 14px; height: 10px; border-radius: 2px; display: inline-block; }
.lg-off { background: var(--offcut-fill); border: 1px dashed var(--offcut); }
.lg-scrap { background: repeating-linear-gradient(135deg, var(--scrap) 0 1px, transparent 1px 4px); border: 1px solid var(--border-strong); }
.lg-cut { height: 0 !important; border-top: 2px dashed var(--cut); }
.lg-sheet { background: var(--sheet); border: 1px solid var(--sheet-edge); }

/* ── Costs table ───────────────────────────────────────── */
.costs { padding: 0; overflow: hidden; }
.costs .panel-head { padding: 12px 14px 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
th, td { padding: 8px 14px; text-align: right; white-space: nowrap; }
th:first-child, td:first-child, th:nth-child(2), td:nth-child(2) { text-align: left; }
th { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 650; border-bottom: 1px solid var(--border); }
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:hover { background: var(--panel-2); }
tbody tr.hl { background: var(--accent-soft); }
tfoot td { font-weight: 700; border-top: 1px solid var(--border-strong); }
tfoot tr.sub td { font-weight: 500; color: var(--muted); border-top: 1px solid var(--border); padding-top: 6px; padding-bottom: 6px; }
td .nm { display: inline-flex; align-items: center; gap: 8px; }
td.bad { color: var(--bad); font-weight: 700; }
.costs .note { padding: 10px 14px 12px; font-size: 12px; color: var(--faint); margin: 0; }

/* ── Tooltip ───────────────────────────────────────── */
.tooltip {
  position: fixed; z-index: 50; pointer-events: none;
  background: #1f1d1a; color: #f4f2ee; border-radius: 8px; padding: 8px 10px;
  font-size: 12.5px; line-height: 1.45; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25); max-width: 260px;
}
.tooltip b { display: block; font-size: 13px; margin-bottom: 2px; }
.tooltip .r { display: flex; justify-content: space-between; gap: 14px; }
.tooltip .r span:first-child { color: #b7b1a6; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); background: var(--panel); border: 1px dashed var(--border-strong); border-radius: var(--radius); }
.empty-state h3 { margin: 0 0 4px; color: var(--text); font-size: 17px; }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 1000px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; overflow: visible; border-right: 0; padding: 16px 16px 0; }
  .main { padding: 16px; }
  .project-name { display: none; }
}
@media (max-width: 640px) {
  .topbar { position: static; flex-wrap: wrap; gap: 8px; padding: 8px 16px; }
  .status { order: 10; width: 100%; }
  #btnOptimize { padding: 0 9px; }
  #btnOptimize span { display: none; }
  .stock-grid { grid-template-columns: minmax(0, 1fr) 58px 58px 38px 66px 24px; }
  .part-grid { grid-template-columns: 12px minmax(0, 1fr) 56px 56px 38px 40px 24px; }
  .add-form { grid-template-columns: minmax(0, 1fr) 12px minmax(0, 1fr) 64px; }
  .add-form #addName { grid-column: 1 / -1; }
  .add-form .btn-add { grid-column: 1 / -1; justify-content: center; }
}
@media print {
  .topbar, .sidebar { display: none; }
  .layout { display: block; }
}