/* =========================================================
   LU740 Bedienungsanleitung — Druck-Stylesheet
   DIN A4, einseitig, schwarz auf weiß mit Bordeaux-Akzent
   ========================================================= */

@page {
  size: A4 portrait;
  margin: 0;
}

:root {
  --ink: #111111;
  --ink-soft: #2a2a2a;
  --ink-muted: #5a5a5a;
  --ink-faint: #9a9a9a;
  --rule: #d8d4cf;
  --rule-strong: #1a1a1a;
  --paper: #ffffff;
  --tint: #f6f3ee;          /* warm paper tint for boxes */
  --tint-2: #efe9e0;        /* zebra stripe */
  --accent: #bd5226;        /* lexvision burnt orange */
  --accent-soft: #f6e7de;
  --warn: #8a4a00;          /* amber for hinweis */
  --warn-soft: #f6ecd9;

  --serif: "Source Serif 4", "Source Serif Pro", "Cambria", Georgia, serif;
  --sans:  "Inter Tight", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono:  "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: #ddd;
  font-family: var(--serif);
  color: var(--ink);
  font-size: 10.5pt;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- Page frame (DIN A4 = 210 × 297 mm) ---------- */
.page {
  position: relative;
  width: 210mm;
  height: 297mm;
  margin: 8mm auto;
  background: var(--paper);
  padding: 22mm 20mm 20mm 20mm;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1), 0 8px 24px rgba(0,0,0,0.12);
  page-break-after: always;
  break-after: page;
}
.page:last-child { page-break-after: auto; }

/* ---------- Header / Footer ---------- */
.page-header {
  position: absolute;
  top: 10mm;
  left: 20mm;
  right: 20mm;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 2.5mm;
  border-bottom: 0.4pt solid var(--ink);
  font-family: var(--sans);
  font-size: 7.5pt;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.page-header .ph-l { font-weight: 600; }
.page-header .ph-r { color: var(--ink-muted); }
.page-header .ph-r b { color: var(--ink); font-weight: 600; }

.page-footer {
  position: absolute;
  bottom: 10mm;
  left: 20mm;
  right: 20mm;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2.5mm;
  border-top: 0.4pt solid var(--rule);
  font-family: var(--sans);
  font-size: 7.5pt;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}
.page-footer .pf-num {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.page-footer .pf-num::before { content: "— "; color: var(--ink-faint); }
.page-footer .pf-num::after  { content: " —"; color: var(--ink-faint); }

/* ---------- Section numbering / typography ---------- */
.kicker {
  font-family: var(--sans);
  font-size: 8pt;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 1.5mm 0;
}

h1.section {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 22pt;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 4mm 0;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 6mm;
}
h1.section .num {
  font-size: 14pt;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  border-right: 0.6pt solid var(--ink);
  padding-right: 6mm;
}

h2.sub {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 12pt;
  letter-spacing: 0;
  margin: 5mm 0 1.5mm 0;
  color: var(--ink);
  border-bottom: 0.4pt solid var(--rule);
  padding-bottom: 1mm;
}
h2.sub .num {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  margin-right: 2.5mm;
  font-weight: 500;
}

h3.subsub {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 10pt;
  margin: 4mm 0 1mm 0;
  color: var(--ink);
}

p { margin: 0 0 2.5mm 0; text-wrap: pretty; hyphens: auto; }

ul, ol { margin: 0 0 3mm 0; padding-left: 5mm; }
li { margin-bottom: 1mm; }

strong { font-weight: 600; }

/* ---------- Cover page ---------- */
.cover {
  padding: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
}
.cover-top {
  padding: 18mm 20mm 0 20mm;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.cover-logo { height: 11mm; width: auto; max-width: 60mm; object-fit: contain; }
.cover-meta {
  font-family: var(--sans);
  font-size: 7.5pt;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: right;
  color: var(--ink-soft);
  line-height: 1.6;
}
.cover-meta b { display: block; color: var(--ink); }

.cover-body {
  padding: 0 20mm;
  align-self: center;
  position: relative;
}
.cover-cat {
  font-family: var(--sans);
  font-size: 8.5pt;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4mm;
  display: flex;
  align-items: center;
  gap: 4mm;
}
.cover-cat::before {
  content: "";
  display: inline-block;
  width: 12mm;
  height: 0.8pt;
  background: var(--accent);
}
.cover-title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 37pt;
  line-height: 1;
  letter-spacing: -0.03em;
  white-space: nowrap;
  margin: 0 0 3mm 0;
  color: var(--ink);
}
.cover-sub {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 16pt;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink-soft);
  margin: 0 0 7mm 0;
  max-width: 150mm;
}
.cover-doc {
  font-family: var(--serif);
  font-style: italic;
  font-size: 11pt;
  color: var(--ink-muted);
  border-left: 2pt solid var(--accent);
  padding-left: 4mm;
  max-width: 120mm;
}

.cover-image {
  position: static;
  width: 100%;
  height: 66mm;
  margin-top: 9mm;
  background: #ffffff url("assets/sp350-cover.png") center/contain no-repeat;
  border-radius: 0;
}

.cover-bottom {
  padding: 0 20mm 18mm 20mm;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 6mm;
  border-top: 0.6pt solid var(--ink);
  padding-top: 6mm;
  margin-top: auto;
}
.cover-spec {
  font-family: var(--sans);
}
.cover-spec .lbl {
  font-size: 7pt;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1mm;
}
.cover-spec .val {
  font-size: 11pt;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.cover-spec .val small {
  font-size: 7.5pt;
  font-weight: 400;
  color: var(--ink-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: block;
  margin-top: 0.5mm;
}

/* ---------- Boxes ---------- */
.box {
  border: 0.6pt solid var(--ink);
  padding: 4mm 5mm;
  margin: 3mm 0 4mm 0;
  background: var(--paper);
}
.box.tinted { background: var(--tint); border-color: var(--ink); }

.callout {
  display: grid;
  grid-template-columns: 9mm 1fr;
  gap: 3mm;
  border: 0.6pt solid var(--ink);
  padding: 2.5mm 4mm;
  margin: 2.5mm 0;
  background: var(--paper);
  align-items: start;
}
.callout .icon {
  width: 9mm;
  height: 9mm;
  display: flex;
  align-items: center;
  justify-content: center;
}
.callout .body {
  font-size: 9.5pt;
  line-height: 1.4;
}
.callout .body .ttl {
  font-family: var(--sans);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 8pt;
  margin-bottom: 1mm;
  display: block;
}

.callout.warn {
  background: #fff;
  border-color: var(--accent);
  border-left: 2.4pt solid var(--accent);
}
.callout.warn .ttl { color: var(--accent); }

.callout.note {
  background: var(--warn-soft);
  border-color: var(--warn);
  border-left: 2.4pt solid var(--warn);
}
.callout.note .ttl { color: var(--warn); }

.callout.danger {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.callout.danger .ttl { color: #fff; }
.callout.danger .icon svg { fill: #fff; stroke: #fff; }

/* ---------- Tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 9pt;
  margin: 2mm 0 3mm 0;
}
table th {
  text-align: left;
  font-weight: 600;
  font-size: 7.5pt;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: var(--ink);
  padding: 1.6mm 2.5mm;
  border-bottom: 0.4pt solid var(--ink);
}
table td {
  padding: 1mm 2.5mm;
  vertical-align: top;
  border-bottom: 0.3pt solid var(--rule);
}
table tbody tr:nth-child(even) td { background: var(--tint); }
table .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
table .ch {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 8.5pt;
  width: 12mm;
  color: var(--accent);
}

/* Spec table (key/value) */
.spec-table {
  font-family: var(--sans);
  width: 100%;
  border-collapse: collapse;
  font-size: 9.5pt;
}
.spec-table tr { border-bottom: 0.3pt solid var(--rule); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td {
  padding: 1.7mm 0;
  vertical-align: top;
}
.spec-table td.k {
  width: 42%;
  color: var(--ink-muted);
  font-size: 8.5pt;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
}
.spec-table td.v {
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- TOC ---------- */
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--sans);
  font-size: 11pt;
}
.toc-list li {
  display: flex;
  align-items: baseline;
  gap: 3mm;
  padding: 1.9mm 0;
  border-bottom: 0.3pt solid var(--rule);
}
.toc-list li.major {
  font-weight: 700;
  font-size: 12pt;
  border-bottom: 0.6pt solid var(--ink);
}
.toc-list .num {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-weight: 600;
  width: 10mm;
  flex-shrink: 0;
}
.toc-list .ttl { flex: 1; }
.toc-list .dots {
  flex: 1;
  border-bottom: 0.3pt dotted var(--ink-faint);
  transform: translateY(-1.5mm);
  margin: 0 2mm;
  min-width: 8mm;
}
.toc-list .pg {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--ink);
  width: 10mm;
  text-align: right;
  flex-shrink: 0;
}
.toc-list li.sub {
  padding-left: 10mm;
  font-size: 9.5pt;
  font-weight: 400;
  color: var(--ink-soft);
  border-bottom: 0.2pt dotted var(--rule);
  padding-top: 1.4mm;
  padding-bottom: 1.4mm;
}
.toc-list li.sub .num { color: var(--ink-muted); font-weight: 500; }

/* ---------- Two-column layout ---------- */
.cols-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7mm;
}
.cols-2-wide-left {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 8mm;
}

/* ---------- Diagrams ---------- */
.diagram {
  margin: 3mm 0 4mm 0;
}
.diagram-caption {
  font-family: var(--sans);
  font-size: 8pt;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-top: 1.5mm;
  text-align: center;
}
.diagram-caption b {
  color: var(--ink);
  font-weight: 600;
}

/* Product diagram with labels */
.product-diagram {
  position: relative;
  background: var(--tint);
  padding: 6mm;
  border: 0.4pt solid var(--rule);
}
.product-diagram img {
  width: 100%;
  height: auto;
  display: block;
}
.label-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--sans);
  font-size: 9pt;
  counter-reset: lbl;
}
.label-list li {
  display: grid;
  grid-template-columns: 7mm 1fr;
  gap: 3mm;
  padding: 1.8mm 0;
  border-bottom: 0.3pt solid var(--rule);
  align-items: baseline;
}
.label-list li::before {
  counter-increment: lbl;
  content: counter(lbl);
  font-weight: 700;
  font-size: 9pt;
  color: #fff;
  background: var(--accent);
  border-radius: 50%;
  width: 5mm;
  height: 5mm;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}
.label-list li b {
  display: block;
  color: var(--ink);
  font-weight: 600;
  font-size: 9.5pt;
  margin-bottom: 0.3mm;
}
.label-list li span {
  color: var(--ink-muted);
  font-size: 8.5pt;
  line-height: 1.35;
}

/* Step list */
.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 3mm 0;
}
.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 9mm 1fr;
  gap: 3mm;
  padding: 3mm 0;
  border-top: 0.3pt solid var(--rule);
  align-items: start;
}
.steps li:last-child { border-bottom: 0.3pt solid var(--rule); }
.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--sans);
  font-weight: 700;
  font-size: 14pt;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.steps li b {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 10.5pt;
  display: block;
  margin-bottom: 1mm;
}
.steps li span {
  font-size: 9.5pt;
  line-height: 1.45;
  color: var(--ink-soft);
}

/* Menu tree */
.menu-tree {
  font-family: var(--mono);
  font-size: 8.5pt;
  background: var(--tint);
  border: 0.4pt solid var(--rule);
  padding: 4mm 5mm;
  margin: 2mm 0;
  white-space: pre-wrap;
  line-height: 1.7;
}
.menu-tree .root { color: var(--accent); font-weight: 700; }
.menu-tree .leaf { color: var(--ink-muted); }

/* Quick reference card */
.qrc {
  border: 1pt dashed var(--ink);
  padding: 8mm;
  margin: 0;
}
.qrc-tear {
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  font-family: var(--sans);
  font-size: 7.5pt;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.qrc-tear-top { top: 12mm; }
.qrc-tear svg { vertical-align: middle; margin: 0 3mm; }

.qrc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5mm 8mm;
  margin-top: 4mm;
}
.qrc-block .ttl {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 9pt;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  border-bottom: 0.6pt solid var(--accent);
  padding-bottom: 1mm;
  margin-bottom: 2mm;
}
.qrc-block dl {
  margin: 0;
  font-family: var(--sans);
  font-size: 8.5pt;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1mm 3mm;
}
.qrc-block dt {
  font-weight: 600;
  font-family: var(--mono);
  color: var(--ink);
  font-size: 8pt;
}
.qrc-block dd {
  margin: 0;
  color: var(--ink-soft);
}

/* Index */
.index-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  font-family: var(--sans);
  font-size: 9pt;
  line-height: 1.6;
}
.index-cols dl:first-child { padding-right: 8mm; }
.index-cols dl:last-child {
  padding-left: 8mm;
  border-left: 0.3pt solid var(--rule);
}
.index-cols dl { margin: 0; }
.index-cols .letter {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 11pt;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin: 3mm 0 1mm 0;
  padding-bottom: 0.5mm;
  border-bottom: 0.6pt solid var(--accent);
  break-after: avoid;
}
.index-cols .letter:first-child { margin-top: 0; }
.index-cols .entry {
  display: flex;
  justify-content: space-between;
  break-inside: avoid;
}
.index-cols .entry .pg {
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
  margin-left: 2mm;
}

/* Master/Slave wiring */
.wiring {
  background: var(--tint);
  padding: 8mm 6mm;
  border: 0.4pt solid var(--rule);
  margin: 3mm 0;
}

/* Decorative elements */
.divider {
  border: 0;
  border-top: 0.4pt solid var(--ink);
  margin: 4mm 0;
}
.divider.faint { border-top: 0.3pt solid var(--rule); }

.lead {
  font-family: var(--serif);
  font-size: 12pt;
  line-height: 1.4;
  color: var(--ink-soft);
  margin-bottom: 4mm;
  max-width: 150mm;
}

/* Print-specific */
@media print {
  html, body { background: #fff; }
  .page {
    margin: 0;
    box-shadow: none;
  }
  .no-print { display: none !important; }
}

/* Screen helper toolbar */
.toolbar {
  position: fixed;
  top: 12px;
  right: 12px;
  background: #1a1a1a;
  color: #fff;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.05em;
  padding: 8px 12px;
  border-radius: 6px;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  display: flex;
  gap: 12px;
  align-items: center;
}
.toolbar button {
  background: #fff;
  color: #111;
  border: 0;
  font: inherit;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
}
.toolbar button:hover { background: #eee; }