/* =============================================================================
   VoltageLab /nec — Design System
   Mobile-first. Light theme, matching voltagelab.com.

   Breakpoints (min-width, mobile-first):
     560px   large phone / small tablet
     768px   tablet
     1080px  calculator goes two-column, results become sticky
     1280px  full container width
   ============================================================================= */

/* ── Tokens ─────────────────────────────────────────────────────────────────── */
:root {
  --clr-bg:          #ffffff;
  --clr-bg-2:        #f6f8fb;
  --clr-surface:     #ffffff;
  --clr-surface-2:   #f1f5f9;
  --clr-border:      #e2e8f0;
  --clr-border-2:    #cbd5e1;

  --clr-primary:     #1a4fb4;
  --clr-primary-dim: #123a87;
  --clr-primary-bg:  #edf2fb;

  --clr-accent:      #0b7a72;
  --clr-accent-dim:  #075e58;
  --clr-accent-bg:   #e6f5f3;

  --clr-success:     #059669;
  --clr-success-bg:  #ecfdf5;
  --clr-warning:     #b45309;
  --clr-warning-bg:  #fffbeb;
  --clr-danger:      #dc2626;
  --clr-danger-bg:   #fef2f2;

  --clr-text:        #0f172a;
  --clr-text-2:      #334155;
  --clr-text-3:      #5b6b80;   /* 4.6:1 on white — passes AA for body text */
  --clr-text-4:      #64748b;
  --clr-text-inv:    #ffffff;

  /* Aliases kept for templates written against the older token names */
  --clr-text-primary: var(--clr-text);
  --clr-text-muted:   var(--clr-text-3);

  --font-sans:    'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  --font-mono:    'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --sp-xs: 0.25rem;
  --sp-sm: 0.5rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2rem;
  --sp-2xl: 3rem;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  --t-fast: 140ms ease;
  --t-mid:  240ms ease;

  --shadow-sm: 0 1px 2px rgba(15,23,42,0.06), 0 1px 3px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 14px rgba(15,23,42,0.07), 0 2px 5px rgba(15,23,42,0.04);
  --shadow-lg: 0 12px 32px rgba(15,23,42,0.10), 0 4px 10px rgba(15,23,42,0.05);

  /* Height of the sticky header — used for scroll offsets */
  --header-h: 60px;

  /* Minimum comfortable touch target */
  --tap: 44px;
}

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

html {
  font-size: 112.5%; /* 18px base — two steps up from the 16px default */
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  /* Anchors and results clear the sticky header instead of hiding beneath it */
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  background: var(--clr-bg-2);
  color: var(--clr-text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  /* Nothing may push the page sideways on a phone */
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--clr-primary); }

/* Long code refs and slugs must break rather than widen the page */
h1, h2, h3, p, li, td, th, .step-value, code { overflow-wrap: anywhere; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); }

/* ── Focus & skip link ──────────────────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 2px;
  border-radius: 3px;
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--clr-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: 0 0 var(--r-md) 0;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--sp-md);
}
@media (min-width: 768px) { .container { padding-inline: var(--sp-lg); } }

.page-shell { padding-block: var(--sp-lg) var(--sp-2xl); }

/* One responsive card grid used by every listing on the site */
.card-grid,
.grid-3,
.grid-2 {
  display: grid;
  gap: var(--sp-md);
  grid-template-columns: 1fr;
}
@media (min-width: 560px) {
  .card-grid, .grid-3, .grid-2 {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--sp-lg);
  }
}
.card-grid-featured { grid-template-columns: 1fr; }
@media (min-width: 560px) {
  .card-grid-featured { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}

/* On a single-column phone width, 52 calculators stacked one-per-row makes
   the homepage ~18,000px tall. Clamp each category grid to a few cards and
   let a "Show all" button reveal the rest — full markup stays in the DOM
   (nothing removed, nothing hidden from crawlers) so this is presentation
   only. Categories above the phone breakpoint already wrap into columns
   and don't need it. */
@media (max-width: 559px) {
  .card-grid-collapsible {
    max-height: 620px;
    overflow: hidden;
    position: relative;
  }
  .card-grid-collapsible::after {
    content: '';
    position: absolute;
    inset: auto 0 0 0;
    height: 72px;
    background: linear-gradient(to bottom, rgba(246,248,251,0), var(--clr-bg-2) 85%);
    pointer-events: none;
  }
  .card-grid-collapsible.expanded {
    max-height: none;
    overflow: visible;
  }
  .card-grid-collapsible.expanded::after { display: none; }
}
.grid-show-more {
  display: none;
}
@media (max-width: 559px) {
  .grid-show-more {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    justify-content: center;
    margin-top: var(--sp-md);
    padding: 12px;
    background: #fff;
    border: 1.5px solid var(--clr-border-2);
    border-radius: var(--r-md);
    font-weight: 600;
    font-size: 0.925rem;
    color: var(--clr-primary);
  }
  .grid-show-more .chevron { transition: transform var(--t-fast); }
  .grid-show-more[aria-expanded="true"] .chevron { transform: rotate(180deg); }
}

/* ── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* Wraps so the open nav drops onto its own row beneath the logo */
  flex-wrap: wrap;
  gap: var(--sp-md);
  min-height: var(--header-h);
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  text-decoration: none;
  white-space: nowrap;
}
.logo-img { display: block; height: 32px; width: auto; flex: none; }
.logo-badge {
  background: var(--clr-primary-bg);
  color: var(--clr-primary);
  border: 1px solid rgba(26,79,180,0.2);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* Hamburger — visible below 1080px, where the five category links stop fitting */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: var(--tap);
  height: var(--tap);
  padding: 0 10px;
  background: none;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-sm);
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--clr-text-2);
  border-radius: 2px;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header-nav {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-sm) 0 var(--sp-md);
  border-top: 1px solid var(--clr-border);
  width: 100%;
}
.header-nav.open { display: flex; }
.header-nav a {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: var(--tap);
  padding: 0 var(--sp-sm);
  border-radius: var(--r-sm);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--clr-text-2);
  text-decoration: none;
  white-space: nowrap;
}
.header-nav a:hover { background: var(--clr-primary-bg); color: var(--clr-primary); }
.header-nav a[aria-current="page"] { color: var(--clr-primary); font-weight: 600; background: var(--clr-primary-bg); }

.edition-pill {
  display: none;
  align-items: center;
  gap: 6px;
  background: var(--clr-primary-bg);
  border: 1px solid rgba(26,79,180,0.2);
  border-radius: 100px;
  padding: 5px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-primary);
  white-space: nowrap;
}
.edition-pill::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--clr-success);
  border-radius: 50%;
}

@media (min-width: 1080px) {
  .header-inner { flex-wrap: nowrap; }
  .nav-toggle { display: none; }
  .header-nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 2px;
    width: auto;
    padding: 0;
    border-top: none;
    flex-shrink: 1;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .header-nav::-webkit-scrollbar { display: none; }
  .header-nav a { min-height: 36px; padding: 0 9px; font-size: 0.92rem; }
  .edition-pill { display: inline-flex; margin-left: var(--sp-sm); flex: none; }
}

/* ── Hero ───────────────────────────────────────────────────────────────────── */
.hero {
  background-color: #f8fafc;
  background-image:
    linear-gradient(90deg, rgba(26,79,180,0.055) 1px, transparent 1px),
    linear-gradient(180deg, rgba(26,79,180,0.055) 1px, transparent 1px);
  background-size: 28px 28px;
  border-bottom: 1px solid var(--clr-border);
  padding-block: var(--sp-xl);
  text-align: center;
}
@media (min-width: 768px) { .hero { padding-block: var(--sp-2xl); } }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-primary-dim);
  background: #fff;
  padding: 6px 14px 6px 11px;
  border-radius: var(--r-sm);
  border: 1px solid var(--clr-border-2);
  border-left: 3px solid var(--clr-accent);
  margin-bottom: var(--sp-md);
}
.hero h1 {
  font-size: clamp(1.65rem, 5.5vw, 2.85rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: var(--sp-md);
  text-wrap: balance;
}
.hero h1 span { color: var(--clr-primary); }
.hero-sub {
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  color: var(--clr-text-2);
  max-width: 62ch;
  margin: 0 auto var(--sp-lg);
}

.hero-search {
  position: relative;
  max-width: 520px;
  margin: 0 auto var(--sp-lg);
}
.hero-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--clr-text-3);
  pointer-events: none;
}
.hero-search input[type="search"] {
  width: 100%;
  min-height: 52px;
  padding: 12px 16px 12px 46px;
  font-size: 1rem;
  background: #fff;
  border: 1.5px solid var(--clr-border-2);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}
.hero-search input::-webkit-search-cancel-button { cursor: pointer; }

.hero-stats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-lg) var(--sp-xl);
}
@media (min-width: 768px) { .hero-stats { gap: var(--sp-2xl); } }
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1;
}
.stat-label {
  font-size: 0.72rem;
  color: var(--clr-text-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 5px;
  display: block;
}

/* ── Breadcrumb & page head ─────────────────────────────────────────────────── */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-lg);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--clr-text-3); text-decoration: none; }
.breadcrumb a:hover { color: var(--clr-primary); text-decoration: underline; }
.breadcrumb .current { color: var(--clr-text); font-weight: 600; }

.page-head { margin-bottom: var(--sp-lg); }
.page-head h1 {
  font-size: clamp(1.5rem, 4.5vw, 2.1rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.page-head-icon { margin-right: 6px; }
.page-head-sub {
  color: var(--clr-text-2);
  margin-top: var(--sp-sm);
  max-width: 70ch;
}
.page-head-meta {
  margin-top: var(--sp-sm);
  font-size: 0.82rem;
  color: var(--clr-text-3);
}
.page-head-calc {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
  align-items: flex-start;
}
@media (min-width: 768px) {
  .page-head-calc { flex-direction: row; align-items: flex-start; justify-content: space-between; }
}

/* ── Cards ──────────────────────────────────────────────────────────────────── */
.card {
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--t-mid), box-shadow var(--t-mid), transform var(--t-mid);
}
.card-link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  height: 100%;
}
.card-link:hover {
  border-color: var(--clr-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-eyebrow {
  display: block;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-primary);
  margin-bottom: var(--sp-sm);
}
.card h2, .card h3 {
  font-size: 1rem;
  font-weight: 650;
  color: var(--clr-text);
  margin-bottom: var(--sp-xs);
  line-height: 1.35;
}
.card p {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  line-height: 1.55;
}
.card-cta {
  margin-top: auto;
  padding-top: var(--sp-md);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--clr-primary);
}
.card-featured { border-color: rgba(26,79,180,0.35); background: linear-gradient(180deg, #fff 0%, var(--clr-primary-bg) 100%); }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.tag-new   { background: #dde8fa; color: #123a87; }
.tag-p1    { background: #fef3c7; color: #92400e; }
.tag-ready { background: #d1fae5; color: #065f46; }
.tag-soon  { background: var(--clr-surface-2); color: var(--clr-text-3); }

/* ── Sections ───────────────────────────────────────────────────────────────── */
.home-section { margin-bottom: var(--sp-2xl); }
.section-head {
  margin-bottom: var(--sp-lg);
  padding-bottom: var(--sp-sm);
  border-bottom: 2px solid var(--clr-border);
  display: grid;
  gap: 4px;
}
@media (min-width: 900px) {
  .section-head {
    grid-template-columns: 1fr auto;
    align-items: end;
    column-gap: var(--sp-lg);
  }
  .section-head .section-link { grid-row: 1 / span 2; grid-column: 2; align-self: center; }
}
.section-head h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-meta {
  font-size: 0.85rem;
  color: var(--clr-text-3);
  max-width: 80ch;
}
.section-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-primary);
  text-decoration: none;
  white-space: nowrap;
}
.section-link:hover { text-decoration: underline; }
.search-empty {
  padding: var(--sp-lg);
  background: #fff;
  border: 1px dashed var(--clr-border-2);
  border-radius: var(--r-lg);
  color: var(--clr-text-3);
  text-align: center;
  margin-bottom: var(--sp-lg);
}

/* ── Callouts ───────────────────────────────────────────────────────────────── */
.callout {
  border-radius: var(--r-lg);
  padding: var(--sp-md) var(--sp-lg);
  margin-bottom: var(--sp-xl);
  font-size: 0.9rem;
  line-height: 1.6;
}
.callout-primary {
  background: var(--clr-primary-bg);
  border: 1px solid rgba(26,79,180,0.25);
  color: #1e3a8a;
}
.callout a { font-weight: 600; white-space: nowrap; }

/* ── Calculator layout ──────────────────────────────────────────────────────── */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
  align-items: start;
}
@media (min-width: 1080px) {
  .calc-layout { grid-template-columns: minmax(0, 1.35fr) minmax(340px, 1fr); gap: var(--sp-xl); }
}

.calc-panel,
.calc-results-inner {
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--sp-lg);
}
@media (min-width: 768px) {
  .calc-panel, .calc-results-inner { padding: var(--sp-xl); }
}

/* The answer stays on screen while the form is edited */
@media (min-width: 1080px) {
  .calc-results { position: sticky; top: calc(var(--header-h) + var(--sp-md)); }
  .calc-results-inner { max-height: calc(100vh - var(--header-h) - var(--sp-xl)); overflow-y: auto; }
}

.panel-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-lg);
  padding-bottom: var(--sp-sm);
  border-bottom: 1px solid var(--clr-border);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-md);
  align-items: start;
}
@media (min-width: 640px) {
  .calc-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--sp-lg); }
}

.form-section-header {
  grid-column: 1 / -1;
  margin-top: var(--sp-sm);
  padding-bottom: var(--sp-xs);
  border-bottom: 2px solid var(--clr-border);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
}

.calc-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-md);
  margin-top: var(--sp-xl);
  padding-top: var(--sp-lg);
  border-top: 1px solid var(--clr-border);
}

/* ── Form controls ──────────────────────────────────────────────────────────── */
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: 6px;
}
.form-group .help {
  font-size: 0.78rem;
  color: var(--clr-text-3);
  margin-top: 5px;
  line-height: 1.45;
}

input[type="number"],
input[type="text"],
input[type="search"],
select {
  width: 100%;
  min-height: var(--tap);
  background: #fff;
  border: 1.5px solid var(--clr-border-2);
  border-radius: var(--r-md);
  color: var(--clr-text);
  padding: 10px 14px;
  /* 16px on touch screens — anything smaller makes iOS Safari zoom on focus */
  font-size: 1rem;
  font-weight: 500;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
@media (min-width: 1080px) {
  /* Pointer devices don't zoom, so the denser type is safe here */
  input[type="number"], input[type="text"], select { font-size: 0.925rem; }
}
input:hover, select:hover { border-color: #94a3b8; }
input:focus, select:focus {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 4px rgba(26,79,180,0.14);
}
input::placeholder { color: #94a3b8; }

/* Native select arrow varies wildly across platforms — supply our own */
.select-wrap { position: relative; }
.select-wrap select {
  appearance: none;
  padding-right: 40px;
  cursor: pointer;
}
.select-chevron {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--clr-text-3);
  pointer-events: none;
}

.input-with-unit { display: flex; }
.input-with-unit input {
  border-radius: var(--r-md) 0 0 var(--r-md);
  border-right: none;
  min-width: 0;
}
.input-unit {
  display: flex;
  align-items: center;
  background: var(--clr-surface-2);
  border: 1.5px solid var(--clr-border-2);
  padding-inline: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--clr-text-2);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  white-space: nowrap;
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--tap);
  padding: 11px 22px;
  border-radius: var(--r-md);
  font-size: 0.925rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}
.btn-sm { min-height: 38px; padding: 8px 14px; font-size: 0.82rem; }
.btn-primary { background: var(--clr-primary); color: #fff; }
.btn-primary:hover { background: var(--clr-primary-dim); box-shadow: 0 6px 16px rgba(26,79,180,0.28); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: #fff; border-color: var(--clr-border-2); color: var(--clr-text-2); }
.btn-secondary:hover { border-color: var(--clr-primary); color: var(--clr-primary); background: var(--clr-primary-bg); }
.btn-ghost { background: transparent; color: var(--clr-text-3); }
.btn-ghost:hover { color: var(--clr-primary); background: var(--clr-primary-bg); }
.btn-calc { flex: 1 1 200px; font-size: 1rem; }
@media (min-width: 640px) { .btn-calc { flex: 0 0 auto; min-width: 200px; } }

/* Sticky action bar — phones only, and only once the form scrolls out of reach */
.calc-sticky-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  padding: 10px var(--sp-md) calc(10px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--clr-border);
  box-shadow: 0 -4px 16px rgba(15,23,42,0.06);
}
.calc-sticky-bar .btn { width: 100%; }
/* Set by app.js only while the bar is showing, so the footer stays reachable */
body.has-sticky-bar { padding-bottom: 76px; }
@media (min-width: 1080px) { body.has-sticky-bar { padding-bottom: 0; } }
@media (min-width: 1080px) { .calc-sticky-bar { display: none !important; } }

/* ── Result ─────────────────────────────────────────────────────────────────── */
.result-empty {
  padding: var(--sp-xl) var(--sp-md);
  text-align: center;
  color: var(--clr-text-3);
  border: 1px dashed var(--clr-border-2);
  border-radius: var(--r-lg);
  background: var(--clr-bg-2);
  font-size: 0.9rem;
}

.result-box {
  background: linear-gradient(180deg, var(--clr-primary-bg) 0%, #fff 100%);
  border: 1px solid rgba(26,79,180,0.25);
  border-left: 5px solid var(--clr-primary);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  margin-bottom: var(--sp-lg);
  animation: fadeSlideIn 0.3s ease;
}
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.result-label {
  font-size: 0.68rem;
  color: var(--clr-text-3);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-sm);
}
.result-header {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.result-value {
  /* Fluid so a long answer like "#3/0 AWG Copper" never overflows the card */
  font-size: clamp(1.5rem, 6vw, 2.5rem);
  font-weight: 700;
  color: var(--clr-primary);
  font-family: var(--font-mono);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.result-unit {
  font-size: 1rem;
  color: var(--clr-text-2);
  font-weight: 600;
}
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-top: var(--sp-md);
}

/* ── Steps ──────────────────────────────────────────────────────────────────── */
.steps-panel {
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-bottom: var(--sp-md);
}
.steps-toggle {
  width: 100%;
  min-height: var(--tap);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  padding: var(--sp-sm) var(--sp-md);
  background: var(--clr-surface-2);
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text-2);
  text-align: left;
}
.steps-toggle:hover { color: var(--clr-primary); background: var(--clr-primary-bg); }
.steps-toggle .chevron { transition: transform var(--t-mid); }
.steps-body { display: none; padding: var(--sp-sm) var(--sp-md) var(--sp-md); }
.steps-body.open { display: block; }

.step-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px var(--sp-md);
  padding: 10px 0;
  border-bottom: 1px solid var(--clr-border);
}
.step-row:last-child { border-bottom: none; }
.step-label { font-size: 0.85rem; color: var(--clr-text-2); }
.step-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text);
  text-align: right;
}
.step-ref {
  grid-column: 1 / -1;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--clr-primary);
}
@media (min-width: 640px) {
  .step-row { grid-template-columns: 1fr auto minmax(72px, auto); align-items: baseline; }
  .step-ref { grid-column: auto; text-align: right; }
}

/* ── Citations ──────────────────────────────────────────────────────────────── */
.citations-panel {
  background: #fff;
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-primary);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: var(--sp-md);
  margin-bottom: var(--sp-md);
}
.citations-title {
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-sm);
}
.citation-list { list-style: none; }
.citation-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--clr-border);
}
.citation-item:last-child { border-bottom: none; }
.citation-primary {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--clr-primary);
  background: var(--clr-primary-bg);
  padding: 1px 6px;
  border-radius: 4px;
  white-space: nowrap;
}
.citation-formerly { font-size: 0.72rem; color: var(--clr-text-3); white-space: nowrap; }
.citation-desc { font-size: 0.82rem; color: var(--clr-text-2); flex: 1 1 100%; }
@media (min-width: 560px) { .citation-desc { flex: 1 1 auto; } }

/* ── Alerts ─────────────────────────────────────────────────────────────────── */
.warning-box, .error-box, .success-box {
  border-radius: var(--r-md);
  padding: var(--sp-md);
  margin-bottom: var(--sp-md);
  font-size: 0.875rem;
  line-height: 1.55;
}
.warning-box { background: var(--clr-warning-bg); border: 1px solid rgba(180,83,9,0.25); border-left: 3px solid var(--clr-warning); color: #7c2d12; }
.error-box   { background: var(--clr-danger-bg);  border: 1px solid rgba(220,38,38,0.22); border-left: 3px solid var(--clr-danger);  color: #991b1b; }
.success-box { background: var(--clr-success-bg); border: 1px solid rgba(5,150,105,0.22); border-left: 3px solid var(--clr-success); color: #065f46; }

/* ── Edition switcher ───────────────────────────────────────────────────────── */
.edition-control { display: flex; align-items: center; gap: var(--sp-sm); }
.edition-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--clr-text-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.edition-switcher {
  display: flex;
  gap: 3px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 100px;
  padding: 3px;
}
.ed-btn {
  min-height: 36px;
  padding: 6px 16px;
  border-radius: 100px;
  border: none;
  background: transparent;
  color: var(--clr-text-3);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
}
.ed-btn:hover { color: var(--clr-primary); }
.ed-btn.active { background: var(--clr-primary); color: #fff; }

/* ── Hub switcher ───────────────────────────────────────────────────────────── */
.hub-switch { margin-top: var(--sp-2xl); padding-top: var(--sp-lg); border-top: 1px solid var(--clr-border); }
.hub-switch h2 { font-size: 0.95rem; font-weight: 700; margin-bottom: var(--sp-md); }
.hub-switch ul { list-style: none; display: flex; flex-wrap: wrap; gap: var(--sp-sm); }
.hub-switch a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: var(--tap);
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text-2);
  text-decoration: none;
}
.hub-switch a:hover { border-color: var(--clr-primary); color: var(--clr-primary); }
.hub-switch-count {
  background: var(--clr-surface-2);
  border-radius: 100px;
  padding: 1px 8px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--clr-text-3);
}

/* ── Quiz ───────────────────────────────────────────────────────────────────── */
.quiz-block {
  background: #fff;
  border: 1px solid var(--clr-border);
  border-top: 3px solid var(--clr-accent);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  margin-top: var(--sp-lg);
  box-shadow: var(--shadow-sm);
}
.quiz-block-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-accent-dim);
  margin-bottom: var(--sp-md);
}
.quiz-question {
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-md);
  margin-bottom: var(--sp-sm);
}
.quiz-q-text { font-size: 0.92rem; margin-bottom: var(--sp-sm); font-weight: 600; }
.quiz-options { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.quiz-option {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: var(--tap);
  padding: 10px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--clr-border);
  background: #fff;
  font-size: 0.875rem;
  color: var(--clr-text-2);
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast), color var(--t-fast);
}
.quiz-option:hover { border-color: var(--clr-primary); color: var(--clr-primary); background: var(--clr-primary-bg); }
.quiz-option.correct { background: var(--clr-success-bg); border-color: var(--clr-success); color: #065f46; }
.quiz-option.wrong   { background: var(--clr-danger-bg);  border-color: var(--clr-danger);  color: #991b1b; }
.quiz-explanation {
  font-size: 0.82rem;
  color: var(--clr-text-2);
  margin-top: 10px;
  display: none;
  padding: 10px;
  background: var(--clr-primary-bg);
  border-radius: var(--r-sm);
}

/* ── App promo ──────────────────────────────────────────────────────────────── */
.app-promo {
  display: flex;
  gap: var(--sp-md);
  align-items: flex-start;
  background: var(--clr-primary-bg);
  border: 1px solid rgba(26,79,180,0.2);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  margin-top: var(--sp-lg);
}
.app-promo-icon {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  object-fit: cover;
  background: #fff;
  border-radius: var(--r-md);
  border: 1px solid var(--clr-border);
}
.app-promo-body { min-width: 0; }
.app-promo-eyebrow {
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-primary);
  margin-bottom: 4px;
}
.app-promo-body h3 { font-size: 1rem; font-weight: 650; margin-bottom: 4px; }
.app-promo-body p { font-size: 0.875rem; color: var(--clr-text-2); line-height: 1.55; }
.app-promo-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-top: var(--sp-md);
}
.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--clr-border-2);
  color: var(--clr-text-2);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.app-store-btn:hover { border-color: var(--clr-primary); color: var(--clr-primary); background: var(--clr-primary-bg); }
.app-store-btn--google:hover { border-color: #00c07a; color: #00875a; background: #e6faf3; }
.app-store-btn--apple:hover { border-color: #000; color: #000; background: #f1f1f1; }

/* ── Footer apps ────────────────────────────────────────────────────────────── */
.footer-apps { margin-top: var(--sp-2xl); padding-top: var(--sp-xl); border-top: 1px solid var(--clr-border); }
.footer-apps-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-4);
  margin-bottom: var(--sp-md);
}
.footer-apps-grid { display: grid; grid-template-columns: 1fr; gap: var(--sp-md); }
@media (min-width: 640px)  { .footer-apps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .footer-apps-grid { grid-template-columns: repeat(3, 1fr); } }
.footer-app-card {
  display: flex;
  gap: var(--sp-sm);
  align-items: flex-start;
  padding: var(--sp-md);
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
}
.footer-app-icon {
  flex: none;
  width: 38px;
  height: 38px;
  object-fit: cover;
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
}
.footer-app-info { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.footer-app-name { font-size: 0.82rem; font-weight: 650; color: var(--clr-text); line-height: 1.3; }
.footer-app-badges { display: flex; flex-wrap: wrap; gap: 6px; }
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 9px;
  border-radius: var(--r-sm);
  background: #fff;
  border: 1px solid var(--clr-border-2);
  color: var(--clr-text-2);
  font-size: 0.7rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.store-badge svg { flex: none; display: block; }
.store-badge:hover { border-color: var(--clr-primary); color: var(--clr-primary); background: var(--clr-primary-bg); }
.store-badge--google:hover { border-color: #00c07a; color: #00875a; background: #e6faf3; }
.store-badge--apple:hover { border-color: #000; color: #000; background: #f1f1f1; }

/* ── Guide / long-form content ──────────────────────────────────────────────── */
.calc-guide-container {
  margin-top: var(--sp-xl);
  padding-top: var(--sp-xl);
  padding-bottom: var(--sp-2xl);
  border-top: 2px solid var(--clr-border);
}
.guide-card {
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  margin-bottom: var(--sp-lg);
  box-shadow: var(--shadow-sm);
}
@media (min-width: 768px) { .guide-card { padding: var(--sp-xl); } }
.guide-card-related { background: var(--clr-bg-2); }
.guide-card h2 {
  font-size: clamp(1.1rem, 3vw, 1.3rem);
  font-weight: 700;
  margin-bottom: var(--sp-md);
  letter-spacing: -0.01em;
}
.guide-card h3 {
  font-size: 1.02rem;
  font-weight: 650;
  margin: var(--sp-lg) 0 var(--sp-sm);
}
.guide-card p, .guide-card li { font-size: 1rem; color: var(--clr-text-2); line-height: 1.7; }
.guide-card p + p { margin-top: var(--sp-sm); }
.guide-card ul, .guide-card ol { margin: var(--sp-sm) 0 var(--sp-md) var(--sp-lg); }
.guide-card li { margin-bottom: 6px; }
.guide-card .card p { font-size: 0.875rem; }
.article-content { max-width: 78ch; }

.formula-box {
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  border-left: 4px solid var(--clr-primary);
  border-radius: var(--r-md);
  padding: var(--sp-md);
  margin: var(--sp-md) 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  /* Long equations scroll inside the box instead of stretching the page */
  overflow-x: auto;
}
.formula-math {
  display: block;
  font-size: clamp(1rem, 3.5vw, 1.2rem);
  font-weight: 700;
  color: var(--clr-primary);
  margin-bottom: var(--sp-sm);
  white-space: nowrap;
}
.formula-legend {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--clr-text-3);
  margin-top: var(--sp-sm);
  line-height: 1.6;
  white-space: normal;
}

/* Every table scrolls in its own track — .table-wrapper is added by app.js
   for tables emitted without one. */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--sp-md) 0;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
}
.data-table, .translator-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
  background: #fff;
}
.data-table th, .translator-table th {
  background: var(--clr-surface-2);
  color: var(--clr-text);
  font-weight: 700;
  padding: 10px 14px;
  border-bottom: 1px solid var(--clr-border);
  white-space: nowrap;
  position: sticky;
  top: 0;
}
.data-table td, .translator-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--clr-border);
  color: var(--clr-text-2);
  vertical-align: top;
}
.data-table tr:nth-child(even) td { background: #fbfcfe; }
.data-table tr:hover td, .translator-table tr:hover td { background: var(--clr-primary-bg); }

.example-box {
  background: var(--clr-bg-2);
  border: 1px solid rgba(26,79,180,0.2);
  border-radius: var(--r-md);
  padding: var(--sp-md);
  margin: var(--sp-md) 0;
}
@media (min-width: 768px) { .example-box { padding: var(--sp-lg); } }
.example-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--clr-primary);
  margin-bottom: var(--sp-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── FAQ ────────────────────────────────────────────────────────────────────── */
.faq-list { display: flex; flex-direction: column; gap: var(--sp-sm); margin-top: var(--sp-md); }
.faq-item { border: 1px solid var(--clr-border); border-radius: var(--r-md); background: #fff; overflow: hidden; }
.faq-item h3 { margin: 0; font-size: inherit; font-weight: inherit; }
.faq-question {
  width: 100%;
  min-height: var(--tap);
  text-align: left;
  background: none;
  border: none;
  padding: var(--sp-md);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-md);
}
.faq-question:hover { color: var(--clr-primary); background: var(--clr-primary-bg); }
.faq-icon { font-size: 1.2rem; color: var(--clr-primary); flex-shrink: 0; }
.faq-answer { display: none; padding: 0 var(--sp-md) var(--sp-md); font-size: 0.9rem; color: var(--clr-text-2); line-height: 1.65; }
.faq-item.open .faq-answer { display: block; }

/* ── Translator ─────────────────────────────────────────────────────────────── */
.translator-search { position: relative; margin-bottom: var(--sp-lg); max-width: 520px; }
.translator-search input[type="search"] { padding-left: 46px; min-height: 52px; font-size: 1rem; border-radius: var(--r-lg); }
.search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--clr-text-3); pointer-events: none; }
.ref-pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--clr-primary);
  background: var(--clr-primary-bg);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  white-space: nowrap;
}
.ref-pill.old { color: var(--clr-text-3); background: var(--clr-surface-2); text-decoration: line-through; }
.change-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  white-space: nowrap;
}
.change-badge.renumbered { background: #ede9fe; color: #5b21b6; }
.change-badge.value      { background: #fef3c7; color: #92400e; }
.change-badge.new        { background: #d1fae5; color: #065f46; }

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer { background: #fff; border-top: 3px solid var(--clr-primary); padding-block: var(--sp-2xl) var(--sp-xl); margin-top: var(--sp-2xl); }
.footer-inner { display: grid; grid-template-columns: 1fr; gap: var(--sp-xl); }
@media (min-width: 640px)  { .footer-inner { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .footer-inner { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-2xl); } }
.footer-brand .logo-img { height: 36px; }
.footer-brand p { font-size: 0.85rem; color: var(--clr-text-3); margin-top: var(--sp-sm); line-height: 1.6; max-width: 42ch; }
.footer-links h2 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text);
  margin-bottom: var(--sp-md);
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 2px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 0.85rem;
  color: var(--clr-text-3);
  text-decoration: none;
}
.footer-links a:hover { color: var(--clr-primary); text-decoration: underline; }
.footer-bottom {
  margin-top: var(--sp-lg);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--clr-border);
  font-size: 0.75rem;
  color: var(--clr-text-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}
@media (min-width: 900px) { .footer-bottom { flex-direction: row; justify-content: space-between; } }
.disclaimer {
  background: var(--clr-warning-bg);
  border: 1px solid rgba(180,83,9,0.2);
  border-radius: var(--r-sm);
  padding: var(--sp-md);
  font-size: 0.78rem;
  color: #78350f;
  margin-top: var(--sp-lg);
  line-height: 1.55;
}

/* ── Utilities ──────────────────────────────────────────────────────────────── */
.mt-sm { margin-top: var(--sp-sm); }
.mt-md { margin-top: var(--sp-md); }
.mt-lg { margin-top: var(--sp-lg); }
.mt-xl { margin-top: var(--sp-xl); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-sm { gap: var(--sp-sm); }
.gap-md { gap: var(--sp-md); }
.text-muted { color: var(--clr-text-3); }
.text-primary { color: var(--clr-primary); }
.text-accent { color: var(--clr-accent-dim); }
.mono { font-family: var(--font-mono); }

/* ── Motion & scrollbars ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .card-link:hover, .btn-primary:hover { transform: none; }
}

@media (pointer: fine) {
  ::-webkit-scrollbar { width: 8px; height: 8px; }
  ::-webkit-scrollbar-track { background: var(--clr-surface-2); }
  ::-webkit-scrollbar-thumb { background: var(--clr-border-2); border-radius: 4px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--clr-text-3); }
}

/* ── Print — a clean one-page submittal of the result ───────────────────────── */
@media print {
  .site-header, .site-footer, .breadcrumb, .calc-panel, .quiz-block,
  .calc-sticky-bar, .result-actions, .skip-link, .hub-switch,
  .edition-control, .faq-list, .callout, .hero-search { display: none !important; }

  body { background: #fff; color: #000; font-size: 11pt; }
  .calc-layout { display: block; }
  .calc-results { position: static !important; }
  .calc-results-inner { max-height: none !important; overflow: visible !important; border: none; box-shadow: none; padding: 0; }
  .guide-card, .result-box, .steps-panel, .citations-panel { break-inside: avoid; box-shadow: none; }
  .result-box { background: #fff; border: 1px solid #000; }
  .steps-body { display: block !important; }
  a[href]::after { content: ''; }
}

/* ── 404 ────────────────────────────────────────────────────────────────────── */
.not-found { text-align: center; padding-block: var(--sp-2xl); }
.not-found-mark { font-size: 3.5rem; opacity: 0.25; margin-bottom: var(--sp-md); }
.not-found h1 { font-size: clamp(1.4rem, 5vw, 2rem); font-weight: 700; margin-bottom: var(--sp-sm); }
.not-found p { color: var(--clr-text-2); }
.not-found-slug { background: var(--clr-surface-2); padding: 3px 8px; border-radius: 4px; font-size: 0.9em; }