:root {
  --ink: #f4f6fb;
  --muted: #98a2b7;
  --bg: #080b12;
  --panel: #111722;
  --panel-2: #171f2d;
  --line: #283348;
  --lime: #c8ff4d;
  --lime-soft: rgba(200, 255, 77, 0.11);
  --purple: #8b5cf6;
  --cut: #16a34a;
  --fold: #dc2626;
  --dimension: #2563eb;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% -10%, rgba(139, 92, 246, 0.15), transparent 27%),
    radial-gradient(circle at 95% 5%, rgba(200, 255, 77, 0.09), transparent 24%),
    var(--bg);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

button, input, select { font: inherit; }
button, select { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 72px;
  padding: 10px clamp(15px, 3vw, 42px);
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 18, 0.88);
  backdrop-filter: blur(18px);
}

.back-link {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 13px;
  text-decoration: none;
  font-size: 23px;
}

.brand-lockup { display: flex; align-items: center; gap: 11px; }
.brand-lockup div { display: grid; gap: 2px; }
.brand-lockup strong { font-size: 16px; }
.brand-lockup small { color: var(--muted); font-size: 11px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 39px;
  height: 39px;
  border-radius: 12px;
  color: #111;
  background: var(--lime);
  font-weight: 950;
}
.header-actions { display: flex; align-items: center; gap: 9px; margin-inline-start: auto; }
.beta-pill {
  padding: 7px 10px;
  color: #dfff96;
  border: 1px solid rgba(200, 255, 77, 0.25);
  border-radius: 999px;
  background: var(--lime-soft);
  font-size: 11px;
  font-weight: 800;
}
.ghost-button, .zoom-controls button {
  min-height: 36px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
}
.ghost-button { min-width: 44px; }

.workspace { width: min(1780px, 100%); margin: auto; padding: 24px clamp(12px, 2vw, 30px) 55px; }
.intro-strip {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 25px;
  padding: 18px 2px 24px;
}
.eyebrow { color: var(--lime); font-size: 11px; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
.intro-strip h1 { margin: 9px 0 6px; font-size: clamp(27px, 3.4vw, 47px); line-height: 1.05; letter-spacing: -.035em; }
.intro-strip p { max-width: 780px; margin: 0; color: var(--muted); line-height: 1.65; }
.legend { display: flex; flex-wrap: wrap; gap: 13px; padding: 12px; border: 1px solid var(--line); border-radius: 13px; background: rgba(17, 23, 34, .75); }
.legend span { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 11px; }
.line-sample { display: block; width: 23px; border-top: 2px solid; }
.line-sample.cut { border-color: var(--cut); }
.line-sample.fold { border-color: var(--fold); border-top-style: dashed; }
.line-sample.dimension { border-color: var(--dimension); }

.studio-grid { display: grid; grid-template-columns: 280px 320px minmax(440px, 1fr); gap: 13px; align-items: stretch; }
.panel { min-width: 0; border: 1px solid var(--line); border-radius: 18px; background: rgba(17, 23, 34, .94); box-shadow: 0 25px 70px rgba(0,0,0,.18); }
.catalog-panel, .controls-panel, .preview-panel { min-height: 700px; }
.catalog-panel, .controls-panel { padding: 17px; }
.preview-panel { display: flex; min-width: 0; flex-direction: column; padding: 17px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 15px; }
.panel-heading > div { display: flex; align-items: center; gap: 9px; }
.panel-heading span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 8px; color: #0d1305; background: var(--lime); font-size: 10px; font-weight: 950; }
.panel-heading h2 { margin: 0; font-size: 15px; }
.panel-heading small { color: var(--muted); font-size: 10px; }
.unit-select { width: 67px; min-height: 32px; padding: 0 8px; color: #111; border-color: var(--lime); background: var(--lime); font-size: 11px; font-weight: 950; }

.search-box { display: flex; align-items: center; gap: 9px; padding: 0 11px; border: 1px solid var(--line); border-radius: 11px; background: #0c111a; }
.search-box span { color: var(--muted); font-size: 20px; }
.search-box input { width: 100%; height: 42px; color: var(--ink); border: 0; outline: 0; background: transparent; }
.category-tabs { display: flex; gap: 5px; margin: 11px 0; padding: 4px; border-radius: 10px; background: #0b1018; }
.category-tabs button { flex: 1; min-height: 31px; padding: 0 7px; color: var(--muted); border: 0; border-radius: 8px; background: transparent; font-size: 10px; font-weight: 800; }
.category-tabs button.active { color: #111; background: var(--lime); }
.template-list { display: grid; gap: 8px; max-height: 570px; overflow-y: auto; padding-inline-end: 3px; }
.template-card { display: grid; grid-template-columns: 62px 1fr; gap: 11px; width: 100%; padding: 10px; text-align: start; color: var(--ink); border: 1px solid var(--line); border-radius: 12px; background: var(--panel-2); }
.template-card:hover, .template-card.active { border-color: rgba(200, 255, 77, .55); background: var(--lime-soft); }
.template-thumb { display: grid; place-items: center; width: 62px; height: 50px; color: var(--lime); border-radius: 9px; background: #0b1018; font-size: 27px; }
.template-copy { display: grid; align-content: center; gap: 4px; }
.template-copy strong { font-size: 12px; }
.template-copy small { color: var(--muted); font-size: 9px; line-height: 1.35; }
.template-badges { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 2px; }
.template-badges i { padding: 3px 5px; color: #cbd5e1; border-radius: 5px; background: rgba(255,255,255,.05); font-size: 8px; font-style: normal; }

.selected-structure { display: flex; align-items: center; gap: 11px; margin-bottom: 14px; padding: 12px; border: 1px solid rgba(200,255,77,.18); border-radius: 12px; background: var(--lime-soft); }
.structure-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 10px; color: #111; background: var(--lime); font-size: 24px; }
.selected-structure div:last-child { display: grid; gap: 4px; }
.selected-structure strong { font-size: 12px; }
.selected-structure small { color: var(--muted); font-size: 9px; }
.dimension-form { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; }
.dimension-form label, .advanced-grid label, .sheet-controls label { display: grid; gap: 6px; color: var(--muted); font-size: 10px; font-weight: 700; }
input, select { width: 100%; min-height: 41px; padding: 0 10px; color: var(--ink); border: 1px solid var(--line); border-radius: 10px; background: #0b1018; }
input[type="color"] { padding: 5px; }
.advanced-settings { margin: 14px 0; border: 1px solid var(--line); border-radius: 11px; background: #0b1018; }
.advanced-settings summary { padding: 12px; color: #cbd5e1; cursor: pointer; font-size: 11px; font-weight: 800; }
.advanced-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 0 12px 12px; }
.primary-button, .secondary-button { min-height: 44px; padding: 0 14px; border-radius: 11px; font-weight: 900; }
.primary-button { width: 100%; color: #10150a; border: 0; background: var(--lime); }
.primary-button.compact { width: auto; }
.secondary-button { color: var(--ink); border: 1px solid var(--line); background: var(--panel-2); }
.precision-note { margin: 11px 2px 0; color: #8892a6; font-size: 9px; line-height: 1.55; }
.validation-message { display: none; margin-bottom: 10px; padding: 9px; color: #fecaca; border: 1px solid rgba(239,68,68,.35); border-radius: 9px; background: rgba(239,68,68,.08); font-size: 10px; }
.validation-message.show { display: block; }

.preview-heading { flex-wrap: wrap; }
.zoom-controls { display: flex; gap: 5px; }
.zoom-controls button { min-width: 35px; padding: 0 8px; }
.piece-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.piece-tabs button { min-height: 32px; padding: 0 10px; color: var(--muted); border: 1px solid var(--line); border-radius: 9px; background: #0b1018; font-size: 9px; font-weight: 800; }
.piece-tabs button.active { color: #111; border-color: var(--lime); background: var(--lime); }
.drawing-stage { position: relative; display: grid; height: 420px; min-height: 420px; flex: 0 0 auto; place-items: center; overflow: auto; border: 1px solid #303a4e; border-radius: 13px; background-color: #f8fafc; background-image: linear-gradient(#dce3ed 1px, transparent 1px), linear-gradient(90deg, #dce3ed 1px, transparent 1px); background-size: 10mm 10mm; }
#dielineSvg { display: block; flex: 0 0 auto; overflow: visible; background: #fff; box-shadow: 0 12px 34px rgba(15,23,42,.16); transition: width .15s ease, height .15s ease; }
.preview-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 11px; }

.results-grid { display: grid; grid-template-columns: minmax(0,.8fr) minmax(0,1.2fr); gap: 13px; margin-top: 13px; }
.metrics-panel, .sheet-panel { padding: 17px; }
.piece-results { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px; }
.piece-result-card { padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: #0b1018; }
.piece-result-card h3 { margin: 0 0 10px; color: var(--lime); font-size: 12px; }
.metric-row { display: flex; justify-content: space-between; gap: 8px; padding: 6px 0; border-top: 1px solid rgba(40,51,72,.65); color: var(--muted); font-size: 9px; }
.metric-row strong { color: var(--ink); text-align: end; }
.sheet-controls { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 9px; }
.sheet-result { display: grid; grid-template-columns: minmax(200px,.9fr) minmax(240px,1.1fr); gap: 14px; align-items: center; margin-top: 14px; }
.sheet-visual-wrap { display: grid; min-height: 230px; place-items: center; padding: 12px; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #0b1018; }
.sheet-visual { position: relative; width: 100%; max-width: 400px; aspect-ratio: 1.414/1; border: 2px solid #6b7280; background: #f8fafc; }
.sheet-piece { position: absolute; border: 1px solid #65a30d; background: rgba(200,255,77,.35); }
.sheet-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sheet-stats div { padding: 12px; border: 1px solid var(--line); border-radius: 11px; background: #0b1018; }
.sheet-stats span { display: block; color: var(--muted); font-size: 9px; }
.sheet-stats strong { display: block; margin-top: 7px; font-size: 18px; }

body[dir="rtl"] { font-family: Tahoma, Arial, sans-serif; }
body[dir="rtl"] .back-link { transform: scaleX(-1); }
body[dir="rtl"] .intro-strip h1 { letter-spacing: 0; line-height: 1.25; }

@media (max-width: 1280px) {
  .studio-grid { grid-template-columns: 250px 300px minmax(400px,1fr); }
  .catalog-panel, .controls-panel, .preview-panel { min-height: 660px; }
}
@media (max-width: 1040px) {
  .studio-grid { grid-template-columns: 280px 1fr; }
  .preview-panel { grid-column: 1 / -1; min-height: 650px; }
  .catalog-panel, .controls-panel { min-height: 650px; }
}
@media (max-width: 760px) {
  .beta-pill { display: none; }
  .intro-strip { align-items: flex-start; flex-direction: column; }
  .studio-grid, .results-grid { grid-template-columns: 1fr; }
  .catalog-panel, .controls-panel, .preview-panel { min-height: auto; }
  .template-list { max-height: 390px; }
  .drawing-stage { height: 380px; min-height: 380px; }
  .piece-results, .sheet-controls, .sheet-result { grid-template-columns: 1fr 1fr; }
  .sheet-result { align-items: stretch; }
}
@media (max-width: 520px) {
  .brand-lockup small { display: none; }
  .workspace { padding-inline: 9px; }
  .dimension-form, .advanced-grid, .piece-results, .sheet-controls, .sheet-result, .sheet-stats { grid-template-columns: 1fr; }
  .preview-actions { flex-direction: column; }
  .drawing-stage { height: 330px; min-height: 330px; }
  .primary-button.compact, .secondary-button { width: 100%; }
}