/* USA Online Loan — Main Stylesheet
   Mobile-first, CLS=0, Core Web Vitals optimized */

/* ===== CSS Custom Properties ===== */
:root {
  --color-primary: #1e3a5f;
  --color-primary-hover: #2d5282;
  --color-accent: #f59e0b;
  --color-accent-hover: #d97706;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-bg: #f8fafc;
  --color-bg-card: #ffffff;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-info: #3b82f6;
  --color-warning: #f59e0b;
  --max-width: 1280px;
  --header-height: 64px;
  --sidebar-width: 300px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

a:hover { color: var(--color-primary-hover); }

ul, ol { padding-left: 1.5rem; }

table { border-collapse: collapse; width: 100%; }

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 9999;
  text-decoration: none;
}
.skip-link:focus { top: 0.5rem; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-md);
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.2;
}

.site-logo .logo-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.site-logo .logo-tagline {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ===== Primary Navigation ===== */
.primary-nav { display: none; }

.primary-nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 0.25rem;
}

.primary-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  touch-action: manipulation;
}

.primary-nav a:hover,
.primary-nav a.active {
  color: #fff;
  background: rgba(255,255,255,0.15);
}

/* ===== Hamburger Menu ===== */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  min-height: 48px;
  min-width: 48px;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  border-radius: var(--radius-sm);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Mobile Nav Overlay ===== */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-primary);
  z-index: 99;
  overflow-y: auto;
  padding: 1.5rem 1rem;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.mobile-nav.is-open {
  display: block;
  transform: translateX(0);
}

.mobile-nav ul {
  list-style: none;
  padding: 0;
}

.mobile-nav li + li { border-top: 1px solid rgba(255,255,255,0.1); }

.mobile-nav a {
  display: block;
  padding: 1rem 0;
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 500;
  touch-action: manipulation;
}

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

/* ===== Breadcrumbs ===== */
.breadcrumbs {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: 0.625rem 1rem;
}

.breadcrumbs-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  align-items: center;
  font-size: 0.8125rem;
}

.breadcrumbs li { display: flex; align-items: center; gap: 0.25rem; }

.breadcrumbs li + li::before {
  content: "›";
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.breadcrumbs a:hover { color: var(--color-primary); text-decoration: underline; }
.breadcrumbs [aria-current="page"] { color: var(--color-text); font-weight: 500; }

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5282 50%, #1e3a5f 100%);
  color: #fff;
  padding: 3rem 1rem;
  text-align: center;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(255,255,255,0.85);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-accent);
  color: var(--color-text);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  min-height: 48px;
  transition: all var(--transition);
  touch-action: manipulation;
}

.hero-cta:hover {
  background: var(--color-accent-hover);
  color: var(--color-text);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245,158,11,0.4);
}

/* ===== Page Header (for pillar/article pages) ===== */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5282 100%);
  color: #fff;
  padding: 2.5rem 1rem 2rem;
}

.page-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-header .category-label {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  color: #fff;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.page-header h1 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.page-header .page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.75);
  margin-top: 0.75rem;
}

.page-header .page-meta span { display: flex; align-items: center; gap: 0.35rem; }

/* ===== Main Layout ===== */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
}

.content-sidebar-wrap {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.content-area { min-width: 0; }

.sidebar { width: 100%; }

/* ===== Article Content ===== */
.article-content h2 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-primary);
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.article-content h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.375rem);
  font-weight: 600;
  color: var(--color-text);
  margin: 1.5rem 0 0.5rem;
  line-height: 1.4;
}

.article-content h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 1.25rem 0 0.5rem;
}

.article-content p {
  margin-bottom: 1.25rem;
  font-size: 1.0625rem;
  line-height: 1.75;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.25rem;
}

.article-content li {
  margin-bottom: 0.5rem;
  font-size: 1.0625rem;
  line-height: 1.7;
}

.article-content strong { font-weight: 700; }

.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  background: #fffbeb;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: #78350f;
}

.article-content table {
  margin: 1.5rem 0;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-content th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
}

.article-content td {
  padding: 0.625rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.article-content tr:last-child td { border-bottom: none; }
.article-content tr:nth-child(even) td { background: #f8fafc; }

/* ===== Info Boxes ===== */
.info-box {
  border-radius: var(--radius-md);
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid;
}

.info-box.tip {
  background: #f0fdf4;
  border-color: var(--color-success);
  color: #14532d;
}

.info-box.warning {
  background: #fffbeb;
  border-color: var(--color-warning);
  color: #78350f;
}

.info-box.info {
  background: #eff6ff;
  border-color: var(--color-info);
  color: #1e3a8a;
}

.info-box-title {
  font-weight: 700;
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Author Box ===== */
.author-box {
  display: flex;
  gap: 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin: 2rem 0;
}

.author-avatar {
  width: 64px;
  height: 64px;
  min-width: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  font-weight: 700;
}

.author-info h4 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.2rem;
  color: var(--color-text);
}

.author-credentials {
  font-size: 0.8125rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.author-bio {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ===== FAQ Accordion ===== */
.faq-section {
  margin: 2.5rem 0;
}

.faq-section h2 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 1rem 1.25rem;
  background: var(--color-bg-card);
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  gap: 0.75rem;
  min-height: 48px;
  touch-action: manipulation;
  transition: background var(--transition);
}

.faq-question:hover { background: #f1f5f9; }

.faq-question[aria-expanded="true"] { background: #f1f5f9; }

.faq-icon {
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  transition: transform var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }

.faq-answer {
  padding: 0 1.25rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg-card);
}

.faq-answer.is-open {
  max-height: 600px;
  padding: 0 1.25rem 1.25rem;
}

/* ===== Related Articles ===== */
.related-articles {
  margin: 2.5rem 0;
  padding: 1.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.related-articles h3 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.related-articles ul {
  list-style: none;
  padding: 0;
}

.related-articles li { margin-bottom: 0.75rem; }

.related-articles a {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1.4;
}

.related-articles a::before {
  content: "→";
  font-size: 0.875rem;
  margin-top: 0.1em;
  flex-shrink: 0;
}

.related-articles a:hover { text-decoration: underline; }

/* ===== Article Cards ===== */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

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

.card-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5282 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-hover);
  margin-bottom: 0.5rem;
}

.card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.4;
  color: var(--color-text);
}

.card h3 a {
  text-decoration: none;
  color: inherit;
}
.card h3 a:hover { color: var(--color-primary); }

.card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex: 1;
}

.card-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 0.75rem;
}

/* ===== Sidebar ===== */
.sidebar-widget {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.sidebar-widget h3 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-widget ul { list-style: none; padding: 0; }

.sidebar-widget li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-widget li:last-child { border-bottom: none; }

.sidebar-widget a {
  font-size: 0.9rem;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}
.sidebar-widget a:hover { color: var(--color-primary); text-decoration: underline; }

.sidebar-cta {
  background: linear-gradient(135deg, var(--color-primary), #2d5282);
  color: #fff;
  border: none;
  text-align: center;
  padding: 1.5rem;
}

.sidebar-cta h3 {
  color: rgba(255,255,255,0.7);
  border-bottom-color: rgba(255,255,255,0.3);
}

.sidebar-cta p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  min-height: 48px;
  touch-action: manipulation;
  transition: all var(--transition);
}

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

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-1px);
}

.btn-full { width: 100%; }

/* ===== Loan Calculator ===== */
.calculator-section {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 2rem 0;
}

.calculator-section h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.calc-field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

.calc-field input,
.calc-field select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: #fff;
  min-height: 48px;
  touch-action: manipulation;
  transition: border-color var(--transition);
  -webkit-appearance: none;
}

.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,58,95,0.1);
}

.calc-results {
  background: linear-gradient(135deg, var(--color-primary), #2d5282);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  color: #fff;
  display: none;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.calc-results.visible {
  display: grid;
}

.calc-result-item { text-align: center; }

.calc-result-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.25rem;
}

.calc-result-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
}

.amortization-wrap {
  margin-top: 1.5rem;
  display: none;
}

.amortization-wrap.visible { display: block; }

.amortization-wrap h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.amortization-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  max-height: 320px;
  overflow-y: auto;
}

.amortization-table-wrap table { font-size: 0.8125rem; }

.amortization-table-wrap th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.6rem 0.875rem;
  font-size: 0.75rem;
  position: sticky;
  top: 0;
}

.amortization-table-wrap td {
  padding: 0.5rem 0.875rem;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
}

.amortization-table-wrap tr:last-child td { border-bottom: none; }
.amortization-table-wrap tr:nth-child(even) td { background: #f8fafc; }

/* ===== Feature Grid ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2rem 0;
}

.feature-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.feature-icon {
  font-size: 2rem;
  width: 48px;
  min-width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.feature-item p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ===== Stats Bar ===== */
.stats-bar {
  background: var(--color-primary);
  padding: 2rem 1rem;
}

.stats-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stat-item .stat-value {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-item .stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.75);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== Categories Section ===== */
.categories-section {
  padding: 3rem 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.silo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.silo-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-decoration: none;
  display: block;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.silo-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.silo-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  color: inherit;
}

.silo-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }

.silo-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.silo-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.silo-card .silo-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== Pillar Page Cluster List ===== */
.cluster-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.cluster-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  border-left: 4px solid var(--color-primary);
  text-decoration: none;
  display: block;
  transition: all var(--transition);
}

.cluster-item:hover {
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-accent);
  color: inherit;
}

.cluster-item h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}

.cluster-item p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ===== Comparison Table ===== */
.comparison-table-wrap { overflow-x: auto; margin: 1.5rem 0; }

/* ===== Footer ===== */
.site-footer {
  background: #0f172a;
  color: rgba(255,255,255,0.75);
  padding: 3rem 1rem 1.5rem;
  margin-top: 3rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand .logo-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
}

.footer-brand p {
  font-size: 0.875rem;
  margin-top: 0.75rem;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  margin-bottom: 1rem;
}

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

.footer-col li { margin-bottom: 0.5rem; }

.footer-col a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.45);
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.6;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.07);
  margin-top: 1rem;
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.toc {
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.toc h4 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.25rem;
}

.toc li {
  font-size: 0.875rem;
  margin-bottom: 0.4rem;
}

.toc a {
  color: var(--color-primary);
  text-decoration: none;
}
.toc a:hover { text-decoration: underline; }

.tag-pill {
  display: inline-block;
  background: #e2e8f0;
  color: var(--color-text-muted);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.last-updated {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
}

/* ===== AI Writer Admin ===== */
.admin-panel {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2rem 0;
}

.admin-panel h2 {
  color: var(--color-accent);
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.admin-field { margin-bottom: 1.25rem; }

.admin-field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.admin-field input,
.admin-field select,
.admin-field textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  min-height: 48px;
  touch-action: manipulation;
  transition: border-color var(--transition);
}

.admin-field input:focus,
.admin-field select:focus,
.admin-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.admin-field select option { background: #1e293b; }

.admin-output {
  background: rgba(255,255,255,0.05);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  min-height: 200px;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  color: #a3e635;
  white-space: pre-wrap;
  overflow-y: auto;
  max-height: 500px;
}

.admin-status {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.75rem;
  font-style: italic;
}

/* ===== Responsive: Tablet (640px+) ===== */
@media (min-width: 640px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .calc-grid { grid-template-columns: repeat(2, 1fr); }
  .calc-results { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .silo-grid { grid-template-columns: repeat(2, 1fr); }
  .cluster-list { grid-template-columns: repeat(2, 1fr); }
  .stats-inner { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Responsive: Tablet Large (768px+) ===== */
@media (min-width: 768px) {
  :root { --header-height: 72px; }

  .menu-toggle { display: none; }
  .primary-nav { display: flex; }

  .hero { padding: 5rem 1rem; }
  .page-header { padding: 3.5rem 1rem 3rem; }
  .categories-section { padding: 4rem 1rem; }
}

/* ===== Responsive: Desktop (1024px+) ===== */
@media (min-width: 1024px) {
  .content-sidebar-wrap {
    flex-direction: row;
    align-items: flex-start;
  }

  .content-area { flex: 1; min-width: 0; }
  .sidebar { width: var(--sidebar-width); min-width: var(--sidebar-width); }

  .cards-grid { grid-template-columns: repeat(3, 1fr); }
  .silo-grid { grid-template-columns: repeat(3, 1fr); }
  .calc-grid { grid-template-columns: repeat(3, 1fr); }
  .calc-results { grid-template-columns: repeat(4, 1fr); }
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
  .cluster-list { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }

  .sidebar { position: sticky; top: calc(var(--header-height) + 1rem); }
}

/* ===== Print ===== */
@media print {
  .site-header, .breadcrumbs, .sidebar, .related-articles,
  .menu-toggle, .mobile-nav, .site-footer, .hero-cta, .btn { display: none !important; }
  .content-sidebar-wrap { flex-direction: column; }
  .content-area { width: 100%; }
  body { font-size: 12pt; color: #000; }
  a { color: #000; }
  h2 { page-break-after: avoid; }
}

/* ===== Definition Block (Featured Snippet targeting) ===== */
.definition-block {
  background: #eff6ff;
  border-left: 4px solid var(--color-primary);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.9375rem;
  line-height: 1.65;
}
.definition-block strong { color: var(--color-primary); }

/* ===== Fact-Check Badge ===== */
.fact-check-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
}
.fact-check-badge::before { content: '✓'; font-weight: 900; }

/* ===== Lead Form ===== */
.lead-form {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5282 100%);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2.5rem 0;
  color: #fff;
}
.lead-form h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: #fff;
}
.lead-form p {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 1.25rem;
}
.lead-form-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
.lead-form-fields input,
.lead-form-fields select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  min-height: 48px;
  touch-action: manipulation;
}
.lead-form-fields input:focus,
.lead-form-fields select:focus {
  outline: 3px solid var(--color-accent);
}
.lead-form .btn-submit {
  width: 100%;
  margin-top: 0.5rem;
  background: var(--color-accent);
  color: #000;
  font-weight: 700;
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  cursor: pointer;
  min-height: 48px;
  transition: background var(--transition);
}
.lead-form .btn-submit:hover { background: var(--color-accent-hover); }
.lead-form .form-disclaimer {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.75rem;
}

@media (min-width: 640px) {
  .lead-form-fields { grid-template-columns: 1fr 1fr; }
  .lead-form-fields .btn-submit-wrap { grid-column: 1 / -1; }
}

/* ===== Sticky CTA (mobile) ===== */
.sticky-cta-mobile {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-primary);
  padding: 0.75rem 1rem;
  z-index: 200;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.15);
}
.sticky-cta-mobile p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.85);
  margin: 0;
  flex: 1;
}
.sticky-cta-mobile .btn {
  white-space: nowrap;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
}
.sticky-cta-mobile .close-sticky {
  background: none;
  border: none;
  color: rgba(255,255,255,0.6);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
}
@media (max-width: 767px) {
  .sticky-cta-mobile { display: flex; }
  body { padding-bottom: 68px; }
}

/* ===== Exit-Intent Popup ===== */
.exit-popup-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.exit-popup-overlay.active { display: flex; }
.exit-popup {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  max-width: 480px;
  width: 100%;
  position: relative;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.exit-popup .popup-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1;
}
.exit-popup h3 {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}
.exit-popup p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}
.exit-popup .btn { width: 100%; }

/* ===== Reading Progress Bar ===== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--color-accent);
  z-index: 9999;
  width: 0%;
  transition: width 0.1s linear;
}

/* ===== Article Layout (2-column with sidebar) ===== */
.article-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.article-main { min-width: 0; }

.article-sidebar {
  width: 100%;
}

@media (min-width: 1024px) {
  .article-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }
  .article-main { flex: 1; min-width: 0; }
  .article-sidebar {
    width: 300px;
    min-width: 300px;
    position: sticky;
    top: calc(var(--header-height) + 1rem);
  }
}

/* ===== Article Header ===== */
.article-header { margin-bottom: 2rem; }

.article-category-tag {
  display: inline-block;
  background: #dbeafe;
  color: #1e40af;
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.article-header h1 {
  font-size: clamp(1.625rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.author-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.author-info .author-avatar {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0;
}

.author-name {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
}

.author-title {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.article-dates {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.date-divider { opacity: 0.5; }

.updated-badge {
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 600;
}

.reading-time {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.fact-check-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.badge-icon { font-weight: 900; }

/* ===== Definition Box (Featured Snippet) ===== */
.definition-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.definition-title {
  font-size: 0.875rem !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.08em !important;
  color: var(--color-primary) !important;
  margin: 0 0 0.5rem !important;
}

.definition-box p {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  margin: 0;
}

/* ===== Breadcrumb (article inline) ===== */
.breadcrumb {
  margin-bottom: 1.25rem;
}

.breadcrumb ol {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
  font-size: 0.8125rem;
}

.breadcrumb li { display: flex; align-items: center; gap: 0.3rem; }

.breadcrumb li + li::before {
  content: "›";
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--color-primary); text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--color-text); font-weight: 500; }

/* ===== Table of Contents ===== */
.toc-title {
  font-size: 0.875rem !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.06em !important;
  color: var(--color-text-muted) !important;
  margin: 0 0 0.75rem !important;
}

.toc-list {
  margin: 0;
  padding-left: 1.25rem;
}

.toc-list li {
  font-size: 0.875rem;
  margin-bottom: 0.4rem;
}

.toc-list a {
  color: var(--color-primary);
  text-decoration: none;
}
.toc-list a:hover { text-decoration: underline; }

/* ===== Article body paragraphs ===== */
.article-main p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.article-main h2 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-primary);
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.article-main h3 {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  font-weight: 600;
  color: var(--color-text);
  margin: 1.5rem 0 0.5rem;
  line-height: 1.4;
}

.article-main ul,
.article-main ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-main li {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

/* ===== Callout Boxes ===== */
.info-callout {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--color-info);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.info-callout h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #1e3a8a;
  margin: 0 0 0.5rem;
}

.info-callout p,
.info-callout ul {
  font-size: 0.9375rem;
  color: #1e3a8a;
  margin: 0;
}

.warning-callout {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-left: 4px solid #f97316;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.warning-callout h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #c2410c;
  margin: 0 0 0.5rem;
}

.warning-callout p {
  font-size: 0.9375rem;
  color: #7c2d12;
  margin: 0;
}

/* ===== Comparison Table ===== */
.table-responsive {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.comparison-table caption {
  caption-side: top;
  text-align: left;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding: 0 0 0.5rem;
  font-weight: 600;
}

.comparison-table th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.comparison-table td {
  padding: 0.625rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.5;
}

.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:nth-child(even) td { background: #f8fafc; }
.comparison-table tr.highlight-row td {
  background: #fefce8;
  font-weight: 600;
}

.table-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: -0.75rem;
  margin-bottom: 1.5rem;
  font-style: italic;
}

/* ===== Steps List ===== */
.steps-list {
  counter-reset: steps;
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem;
}

.steps-list li {
  counter-increment: steps;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
  font-size: 1.0625rem;
  line-height: 1.6;
}

.steps-list li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
  margin-top: 0.15em;
  flex-shrink: 0;
}

/* ===== Author Bio Card ===== */
.author-bio-card {
  display: flex;
  gap: 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 2.5rem 0;
  align-items: flex-start;
}

.author-bio-avatar {
  width: 60px;
  height: 60px;
  min-width: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.02em;
}

.author-bio-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.15rem;
}

.author-bio-title {
  font-size: 0.8125rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.author-bio-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ===== Related Articles (card grid version) ===== */
.related-articles h2 {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

/* ===== Sidebar enhancements ===== */
.sidebar-quick-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.sidebar-quick-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text);
}

.sidebar-quick-list li:last-child { border-bottom: none; }

.sidebar-stats-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.sidebar-stats-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.sidebar-stats-list li:last-child { border-bottom: none; }

.stat-val {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  min-width: 3.5rem;
}

.btn-block { display: flex; width: 100%; }

.sidebar-cta-warning {
  background: linear-gradient(135deg, #7f1d1d, #b91c1c);
  border: none;
  color: #fff;
}

.sidebar-cta-warning h3 { color: rgba(255,255,255,0.7); border-bottom-color: rgba(255,255,255,0.3); }
.sidebar-cta-warning p { color: rgba(255,255,255,0.85); }
.sidebar-cta-warning .sidebar-quick-list li { color: rgba(255,255,255,0.85); border-color: rgba(255,255,255,0.2); }

/* ===== Sticky CTA link variant ===== */
.sticky-cta-link {
  color: #fff;
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  flex: 1;
}
.sticky-cta-link:hover { color: var(--color-accent); }

/* ===== Calculator alt layout (used in articles) ===== */
.calc-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .calc-fields { grid-template-columns: 1fr 1fr; }
  .calc-fields .btn { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .calc-fields { grid-template-columns: repeat(3, 1fr); }
  .calc-fields .btn { grid-column: auto; }
}

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

.calc-field-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.calc-field-group input,
.calc-field-group select {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  min-height: 48px;
  touch-action: manipulation;
  transition: border-color var(--transition);
}

.calc-field-group input:focus,
.calc-field-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,58,95,0.1);
}

.calc-results {
  background: linear-gradient(135deg, var(--color-primary), #2d5282);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  color: #fff;
  display: none;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 1rem;
}

.calc-results.visible { display: grid; }

@media (min-width: 640px) {
  .calc-results { grid-template-columns: repeat(4, 1fr); }
}

.result-item { text-align: center; }

.result-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.65);
  margin-bottom: 0.35rem;
}

.result-value {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-accent);
}