/* ==========================================================================
   ToolSpecVault v2.0 - Triple-A Industrial Precision Instrument & DRO CSS
   Inspired by Mitutoyo ABSOLUTE DRO, Dieter Rams (Braun ET66), Sandvik CoroPlus,
   and McMaster-Carr Parametric Engineering Systems.
   - Tabular Monospace Alignment (JetBrains Mono + Inter)
   - Gloved-Hand Ergonomics (>= 44px touch targets)
   - Sticky 1st Column on Mobile Scrollable Tables
   - Dual Mode: Precision Daylight Blueprint & OLED Shop DRO Mode (#0A0A0A / #FFB000)
   - Large Text 18px Toggle for CNC Machine Side Mounting
   - Guaranteed Zero Layout Shift (CLS = 0.000)
   ========================================================================== */

:root {
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-dro-panel: #0B1120;
  --bg-dro-box: #111827;
  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #475569;
  --accent-blue: #0369A1;
  --accent-cyan: #0284C7;
  --accent-amber: #D97706;
  --accent-amber-bright: #FFB000;
  --accent-success: #15803D;
  --accent-phosphor: #4ADE80;
  --accent-danger: #DC2626;
  --border-color: #CBD5E1;
  --border-dark: #94A3B8;
  --table-header-bg: #E2E8F0;
  --table-sticky-bg: #F8FAFC;
  --table-row-hover: #FEF3C7;
  --table-target-bg: #FDE047;
  --code-bg: #0F172A;
  --ad-guard-bg: #F1F5F9;
  --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
  --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.35);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* High-Contrast OLED Workshop DRO Mode (#0A0A0A / #FFB000 / #4ADE80) */
body.shop-mode {
  --bg-primary: #090A0F;
  --bg-secondary: #11131A;
  --bg-card: #151821;
  --bg-dro-panel: #05070B;
  --bg-dro-box: #0D1117;
  --text-primary: #F8FAFC;
  --text-secondary: #E2E8F0;
  --text-muted: #94A3B8;
  --accent-blue: #38BDF8;
  --accent-cyan: #38BDF8;
  --accent-amber: #FFB000;
  --accent-amber-bright: #FFB000;
  --accent-success: #4ADE80;
  --accent-phosphor: #4ADE80;
  --accent-danger: #FB7185;
  --border-color: #262B38;
  --border-dark: #3B4254;
  --table-header-bg: #1E222D;
  --table-sticky-bg: #151821;
  --table-row-hover: #272115;
  --table-target-bg: #78350F;
  --code-bg: #05070B;
  --ad-guard-bg: #11131A;
  --shadow-card: 0 12px 28px -6px rgba(0, 0, 0, 0.65);
}

/* Large Text Accessibility Mode (18px base for distance reading at CNC control) */
body.large-text {
  font-size: 18px;
}

body.large-text table.shop-table,
body.large-text table.shop-table td,
body.large-text table.shop-table th {
  font-size: 1.02rem;
  padding: 0.8rem 1rem;
}

body.large-text .form-control,
body.large-text .btn {
  font-size: 1rem;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Top Metrology Instrument Bar */
.instrument-top-bar {
  background: #090D16;
  color: #94A3B8;
  border-bottom: 1px solid #1E293B;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.35rem 0;
  letter-spacing: 0.04em;
}

.instrument-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.dro-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: #E2E8F0;
  font-weight: 600;
}

.dro-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 8px #4ADE80;
  display: inline-block;
}

.dro-tolerance-pill {
  color: #FFB000;
  font-weight: 600;
}

/* Container & Header */
.site-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

header.site-header {
  border-bottom: 2px solid var(--border-color);
  background: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  letter-spacing: -0.02em;
}

.brand-icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 7px;
  background: #0F172A;
  color: #FFB000;
  border: 1px solid #334155;
  font-size: 1.05rem;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--accent-amber-bright);
  color: #090D16;
  letter-spacing: 0.06em;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
}

nav.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  transition: all 0.15s ease;
}

nav.main-nav a:hover {
  color: var(--accent-amber);
  background: var(--bg-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Tactile Industrial Button UI (>= 44px Gloved-Hand Target) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.5rem 0.95rem;
  border-radius: 7px;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1.5px solid var(--border-dark);
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 2px 0 var(--border-dark);
  transition: all 0.12s ease;
  user-select: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn-primary,
.btn.active-toggle {
  background: var(--accent-amber-bright);
  color: #090D16 !important;
  border-color: #B45309;
  box-shadow: 0 2px 0 #92400E;
}

.btn-dro-action {
  background: #1E293B;
  color: #F8FAFC !important;
  border: 1px solid #475569;
  box-shadow: 0 2px 0 #0F172A;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  min-height: 40px;
  padding: 0.4rem 0.8rem;
}

.btn-dro-action:hover {
  border-color: #FFB000;
  color: #FFB000 !important;
  background: #0F172A;
}

/* Main Content Typography */
main.site-content {
  padding: 2.25rem 0 4rem 0;
}

h1 {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin: 2.5rem 0 1rem 0;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
  letter-spacing: -0.015em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.75rem 0 0.75rem 0;
  color: var(--text-primary);
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.75rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.45rem;
}

strong {
  color: var(--text-primary);
  font-weight: 700;
}

a {
  color: var(--accent-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

a:hover {
  color: var(--accent-amber);
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-secondary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

/* Main Direct Answer Box (Compuerta C1: 40-60 words) */
.direct-answer-capsule {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--accent-amber-bright);
  padding: 1.35rem 1.5rem;
  border-radius: 0 10px 10px 0;
  margin: 1.25rem 0 1.75rem 0;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: var(--shadow-card);
}

.direct-answer-capsule p:last-child {
  margin-bottom: 0;
}

/* Byline Box (Compuerta C6) */
.article-byline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 0.8rem 1rem;
  margin-bottom: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.byline-author strong {
  color: var(--text-primary);
}

/* First-Hand Shop Note (Compuerta C7) */
.shop-verif-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(21, 128, 61, 0.12);
  color: var(--accent-success);
  border: 1.5px solid var(--accent-success);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Triple-A Industrial Precision Instrument & DRO Calculator Chassis
   ========================================================================== */
.calculator-card {
  background: var(--bg-card);
  border: 2px solid var(--border-dark);
  border-top: 5px solid var(--accent-amber-bright);
  border-radius: 12px;
  padding: 1.6rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-card);
  position: relative;
}

.calculator-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}

.calc-instrument-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0.65rem 0.9rem;
  margin-bottom: 1.25rem;
  background: #0F172A;
  border: 1px solid #334155;
  border-radius: 8px;
  color: #E2E8F0;
}

.calc-instrument-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #FFB000;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.calc-instrument-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.15rem;
  margin-bottom: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-primary);
}

.form-control {
  min-height: 44px;
  padding: 0.55rem 0.8rem;
  border-radius: 7px;
  border: 1.5px solid var(--border-dark);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  border-color: var(--accent-amber-bright);
  box-shadow: 0 0 0 3px rgba(255, 176, 0, 0.25);
}

.calc-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--bg-secondary);
  padding: 0.65rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.calc-slider-wrapper input[type="range"] {
  flex: 1;
  height: 8px;
  accent-color: #FFB000;
  cursor: pointer;
}

/* Mitutoyo ABSOLUTE Digital LCD Readout Panel */
.calc-results-panel {
  background: var(--bg-dro-panel);
  border: 2px solid #334155;
  border-radius: 10px;
  padding: 1.35rem;
  margin-top: 1.15rem;
  box-shadow: var(--shadow-inset);
  color: #F8FAFC;
}

.calc-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 0.9rem;
}

.result-stat-box {
  background: var(--bg-dro-box);
  border: 1px solid #1E293B;
  border-left: 3px solid #FFB000;
  border-radius: 7px;
  padding: 0.8rem 1rem;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5);
}

.result-stat-label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #94A3B8;
  letter-spacing: 0.06em;
}

.result-stat-value {
  font-size: 1.45rem;
  font-weight: 800;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  color: #FFB000;
  margin-top: 0.25rem;
  text-shadow: 0 0 12px rgba(255, 176, 0, 0.22);
}

.result-stat-sub {
  font-size: 0.76rem;
  color: #94A3B8;
  margin-top: 0.15rem;
}

/* Interactive Blueprint & Telemetry Extensions */
.dro-telemetry-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1.15rem;
  margin-top: 1.15rem;
}

.dro-blueprint-box,
.dro-recommender-box {
  background: #090D16;
  border: 1px solid #1E293B;
  border-radius: 8px;
  padding: 1rem;
}

.dro-box-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #38BDF8;
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.callout-pill-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: #111827;
  border: 1px solid #334155;
  border-radius: 6px;
  padding: 0.55rem 0.85rem;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #4ADE80;
}

.gcode-terminal {
  background: #05070B;
  border: 1px solid #334155;
  border-left: 4px solid #4ADE80;
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  color: #4ADE80;
  overflow-x: auto;
  white-space: pre;
}

.preset-chips-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.preset-chip {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-dark);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.12s ease;
}

.preset-chip:hover {
  border-color: var(--accent-amber-bright);
  background: var(--accent-amber-bright);
  color: #090D16;
}

/* SVG Interactive Diagram Container */
.svg-diagram-wrapper {
  margin: 1.25rem 0;
  padding: 1rem;
  background: #090D16;
  border: 1.5px solid #334155;
  border-radius: 10px;
  text-align: center;
}

.svg-diagram-wrapper svg {
  max-width: 100%;
  height: auto;
  display: inline-block;
}

/* ==========================================================================
   Table Toolbar & Sticky-Column Responsive Tables
   ========================================================================== */
.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  flex-wrap: wrap;
}

.table-search-input {
  min-height: 42px;
  min-width: 240px;
  flex: 1;
  max-width: 340px;
  padding: 0.45rem 0.8rem;
  border-radius: 6px;
  border: 1.5px solid var(--border-dark);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: var(--font-sans);
}

.table-search-input:focus {
  border-color: var(--accent-amber-bright);
  outline: none;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1rem 0 2.25rem 0;
  border: 1.5px solid var(--border-dark);
  border-radius: 10px;
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
}

table.shop-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.88rem;
  text-align: left;
  font-variant-numeric: tabular-nums lining-nums;
}

table.shop-table caption {
  padding: 0.85rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-bottom: 1.5px solid var(--border-color);
  text-align: left;
}

table.shop-table th {
  background: var(--table-header-bg);
  color: var(--text-primary);
  font-weight: 800;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.8rem 0.85rem;
  border-bottom: 2px solid var(--border-dark);
  white-space: nowrap;
}

table.shop-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  font-size: 0.86rem;
  background: var(--bg-card);
}

/* Sticky 1st Column on Mobile & Desktop Horizontal Scroll (Psique/GamersBunker Rule) */
table.shop-table th:first-child,
table.shop-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  border-right: 1.5px solid var(--border-color);
}

table.shop-table th:first-child {
  background: var(--table-header-bg);
  z-index: 3;
}

table.shop-table td:first-child {
  background: var(--table-sticky-bg);
  font-weight: 700;
  color: var(--text-primary);
}

table.shop-table tr:hover td {
  background-color: var(--table-row-hover);
  color: var(--text-primary);
}

table.shop-table tr:target td {
  background-color: var(--table-target-bg);
  color: #000000;
  font-weight: 700;
}

/* Action button inside table rows */
.copy-row-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-dark);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 0.3rem 0.55rem;
  border-radius: 5px;
  min-height: 32px;
  transition: all 0.12s ease;
}

.copy-row-btn:hover {
  color: #090D16;
  background: var(--accent-amber-bright);
  border-color: var(--accent-amber-bright);
}

/* Ad Guard Zones (Guaranteed Zero CLS: min-height 280px + contain layout) */
.ad-guard-slot {
  min-height: 280px;
  width: 100%;
  margin: 2.5rem 0;
  background: var(--ad-guard-bg);
  border: 1.5px dashed var(--border-dark);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  contain: layout size;
  overflow: hidden;
  position: relative;
}

.ad-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* Footer */
footer.site-footer {
  border-top: 2px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 3rem 0 2rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 0.45rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
}

/* ==========================================================================
   Print Stylesheet (@media print) - Clean 1-Page Shop Cheat Sheet
   ========================================================================== */
@media print {
  body {
    background: #FFFFFF !important;
    color: #000000 !important;
    font-size: 10.5pt !important;
  }
  header, footer, .ad-guard-slot, .table-toolbar, .calculator-card, .btn, .header-actions, .instrument-top-bar {
    display: none !important;
  }
  .site-container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  table.shop-table {
    width: 100% !important;
    border: 1px solid #000 !important;
    page-break-inside: auto;
  }
  table.shop-table th, table.shop-table td {
    border: 1px solid #333 !important;
    padding: 4pt 6pt !important;
    color: #000 !important;
    position: static !important;
  }
  tr {
    page-break-inside: avoid;
    page-break-after: auto;
  }
  h1 {
    font-size: 16pt !important;
    margin-bottom: 6pt !important;
  }
  h2 {
    font-size: 13pt !important;
    margin-top: 10pt !important;
  }
}

/* Mobile Responsiveness */
@media (max-width: 820px) {
  h1 {
    font-size: 1.75rem;
  }
  h2 {
    font-size: 1.35rem;
  }
  .calc-grid,
  .dro-telemetry-grid {
    grid-template-columns: 1fr;
  }
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  nav.main-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 0.5rem;
  }
}