/* ==========================================================================
   US Finance, Tax, FIRE & Compensation Engine - Core Stylesheet
   Ultra-fast, Zero-CLS, Mobile-Optimized, Accessible Financial UI
   ========================================================================== */

:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --primary-dark: #020617;
  --accent: #059669;
  --accent-light: #10b981;
  --accent-soft: #ecfdf5;
  --brand-blue: #0284c7;
  --brand-blue-soft: #f0f9ff;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --text-main: #0f172a;
  --text-muted: #475569;
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header & Global Navigation */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand-logo {
  height: 38px;
  width: auto;
  max-width: 240px;
  display: block;
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: scale(1.02);
}

@media (max-width: 640px) {
  .brand-logo {
    height: 32px;
  }
}

.brand-badge {
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  text-decoration: none;
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--accent);
}

/* Main Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

/* Breadcrumbs */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.825rem;
  color: var(--gray-500);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--brand-blue);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--gray-400);
}

/* Page Intro & Meta */
.tool-header {
  margin-bottom: 1.5rem;
}

.tool-badge-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.badge-primary { background: #e0f2fe; color: #0369a1; }
.badge-success { background: var(--accent-soft); color: var(--accent); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-slate { background: var(--gray-100); color: var(--gray-700); }

.tool-title {
  font-size: 1.85rem;
  line-height: 1.25;
  color: var(--primary);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.tool-subtitle {
  font-size: 1rem;
  color: var(--gray-600);
  max-width: 850px;
}

/* E-E-A-T Verification Banner */
.eeat-banner {
  background: #ffffff;
  border: 1px solid #bbf7d0;
  border-left: 4px solid var(--accent);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.eeat-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.85rem;
  color: var(--gray-700);
}

.eeat-icon {
  color: var(--accent);
  font-size: 1.25rem;
}

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

.btn-share {
  background: #ffffff;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.btn-share:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

/* Calculator Grid Layout */
.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (min-width: 992px) {
  .calculator-grid {
    grid-template-columns: 460px 1fr;
    align-items: start;
  }
}

/* Input Card */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.35rem;
}

.form-label-hint {
  font-size: 0.75rem;
  color: var(--gray-400);
  font-weight: 400;
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 0.75rem;
  color: var(--gray-500);
  font-size: 0.9rem;
  font-weight: 500;
  pointer-events: none;
}

.input-suffix {
  position: absolute;
  right: 0.75rem;
  color: var(--gray-500);
  font-size: 0.85rem;
  pointer-events: none;
}

.form-control {
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-900);
  background-color: #ffffff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control.has-prefix { padding-left: 1.85rem; }
.form-control.has-suffix { padding-right: 2.25rem; }

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-range {
  width: 100%;
  margin-top: 0.4rem;
  accent-color: var(--accent);
  cursor: pointer;
}

.form-select {
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-900);
  background-color: #ffffff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* Radio / Button Toggles */
.btn-group-toggle {
  display: flex;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--gray-100);
}

.btn-group-toggle label {
  flex: 1;
  text-align: center;
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-700);
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
}

.btn-group-toggle input[type="radio"] {
  display: none;
}

.btn-group-toggle input[type="radio"]:checked + label {
  background: var(--primary);
  color: #ffffff;
}

/* Output & Chart Card */
.results-card {
  background: var(--bg-card);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.kpi-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

.kpi-box.highlight {
  background: #f0fdf4;
  border-color: #86efac;
}

.kpi-box.accent-blue {
  background: var(--brand-blue-soft);
  border-color: #bae6fd;
}

.kpi-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-500);
  margin-bottom: 0.25rem;
}

.kpi-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-feature-settings: "tnum";
}

.kpi-box.highlight .kpi-val {
  color: var(--accent);
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

/* Chart Canvas Container */
.chart-container {
  position: relative;
  width: 100%;
  min-height: 280px;
  max-height: 340px;
  background: #ffffff;
  padding: 0.5rem;
}

/* Tab Navigation for 4-Block Architecture */
.tab-container {
  margin-bottom: 2rem;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 2px;
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.65rem 1.1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  color: var(--primary);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Audit Trail Table */
.audit-table-card {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.audit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

.audit-table th {
  background: var(--gray-100);
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-200);
}

.audit-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-800);
}

.audit-table tr:last-child td {
  border-bottom: none;
}

.audit-table tr.total-row {
  background: var(--gray-50);
  font-weight: 700;
  color: var(--primary);
}

.audit-table .num {
  text-align: right;
  font-family: var(--font-mono);
}

/* Statutory Citations Cards */
.citations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.citation-card {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--brand-blue);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.citation-code {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-blue);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.citation-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.citation-desc {
  font-size: 0.825rem;
  color: var(--gray-600);
  margin-bottom: 0.75rem;
}

.citation-link {
  font-size: 0.8rem;
  color: var(--brand-blue);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.citation-link:hover {
  text-decoration: underline;
}

/* 50-State Programmatic SEO Grid */
.state-pills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.5rem;
  margin-top: 1rem;
}

.state-pill {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-700);
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.state-pill:hover, .state-pill.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 1rem 1.25rem;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--gray-400);
}

.faq-item.open .faq-question::after {
  content: "−";
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1rem;
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  display: block;
}

/* Hub Directory Index Styles */
.search-filter-box {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-input-wrap {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  font-size: 1rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
}

.category-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cat-btn {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  color: var(--gray-700);
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.cat-btn:hover, .cat-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.tools-directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}

.tool-card {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.tool-card-top {
  margin-bottom: 0.75rem;
}

.tool-num-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 0.5rem;
}

.tool-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.4rem;
  line-height: 1.35;
}

.tool-card-desc {
  font-size: 0.825rem;
  color: var(--gray-600);
  margin-bottom: 0.75rem;
  line-height: 1.45;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--gray-500);
  border-top: 1px solid var(--gray-100);
  padding-top: 0.75rem;
}

.seo-stat {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--primary);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--gray-200);
  padding: 2.5rem 1.25rem;
  color: var(--gray-500);
  font-size: 0.825rem;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-disclaimer {
  max-width: 650px;
  line-height: 1.5;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .tool-title { font-size: 1.4rem; }
  .kpi-row { grid-template-columns: 1fr; }
  .calc-card, .results-card { padding: 1.15rem; }
  .header-inner { flex-direction: column; align-items: flex-start; }
}

/* Print / CPA Audit Export Styling */
@media print {
  body {
    background: #ffffff !important;
    color: #0f172a !important;
    font-size: 10pt !important;
  }
  .site-header, .site-footer, .nav-tabs, .btn-share, .search-filter-box, 
  .state-pills-grid, #tab-state, #tab-citations, .related-tools-section, 
  .faq-section, .pitfalls-grid, .breadcrumb-nav, .form-range, .form-label-hint,
  .quick-summary-box, .case-study-card, .rules-table-container {
    display: none !important;
  }
  .tab-pane {
    display: none !important;
  }
  #tab-audit {
    display: block !important;
  }
  .tool-header {
    margin-bottom: 1rem !important;
  }
  .tool-title {
    font-size: 1.4rem !important;
    color: #0f172a !important;
  }
  .tool-subtitle {
    font-size: 0.85rem !important;
    color: #475569 !important;
  }
  .calculator-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 1rem !important;
  }
  .calc-card, .results-card, .audit-table-card {
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    break-inside: avoid;
    padding: 0.75rem !important;
  }
  .audit-table th, .audit-table td {
    padding: 0.35rem 0.5rem !important;
    font-size: 8.5pt !important;
  }
}


/* ==========================================================================
   Editorial, SEO Depth & Case Study Enhancements
   ========================================================================== */

.quick-summary-box {
  background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
  border: 1px solid #a7f3d0;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.quick-summary-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.quick-summary-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #065f46;
  background: #d1fae5;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
}

.quick-summary-text {
  font-size: 1rem;
  line-height: 1.65;
  color: #064e3b;
  margin: 0;
  font-weight: 500;
}

.editorial-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-200);
}

.editorial-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.editorial-prose {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--gray-700);
  margin-bottom: 1.5rem;
}

.editorial-prose p {
  margin-bottom: 1rem;
}

.case-study-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--brand-blue);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.case-study-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.case-study-story {
  font-size: 0.925rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin-bottom: 1rem;
  font-style: italic;
  background: var(--gray-50);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}

.steps-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.steps-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--gray-800);
}

.step-number {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--brand-blue-soft);
  color: var(--brand-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 0.15rem;
}

.rules-table-container {
  overflow-x: auto;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  background: var(--white);
}

.rules-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

.rules-table th {
  background: var(--gray-50);
  color: var(--gray-700);
  font-weight: 700;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.rules-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
  line-height: 1.5;
}

.rules-table tr:last-child td {
  border-bottom: none;
}

.rules-table td.rule-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--gray-900);
}

.pitfalls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.pitfall-card {
  background: #fffbeb;
  border: 1px solid #fef3c7;
  border-left: 4px solid var(--warning);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.pitfall-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.pitfall-icon {
  color: #b45309;
  font-size: 1rem;
}

.pitfall-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #92400e;
}

.pitfall-desc {
  font-size: 0.85rem;
  line-height: 1.6;
  color: #78350f;
  margin: 0;
}

.related-tools-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-200);
}

.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.related-tool-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.related-tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.related-tool-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.4rem;
}

.related-tool-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.related-tool-card:hover .related-tool-title {
  color: var(--accent);
}

.related-tool-desc {
  font-size: 0.8rem;
  color: var(--gray-600);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  flex-grow: 1;
}

.related-tool-cta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-blue);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

@media (max-width: 640px) {
  .pitfalls-grid {
    grid-template-columns: 1fr;
  }
  .related-tools-grid {
    grid-template-columns: 1fr;
  }
}