/* ============================================================
   Cash Denomination Calculator — Global Stylesheet
   Mobile-first responsive design with CSS custom properties
   ============================================================ */

/* ---------- CSS Custom Properties (Light Theme) ---------- */
:root {
  /* Brand Colors */
  --color-primary: #1a73e8;
  --color-primary-dark: #0d47a1;
  --color-primary-light: #e8f0fe;
  --color-accent: #ff9800;
  --color-accent-dark: #e65100;
  --color-accent-light: #fff3e0;

  /* Semantic Colors */
  --color-success: #0f9d58;
  --color-success-light: #e6f4ea;
  --color-danger: #d93025;
  --color-danger-light: #fce8e6;
  --color-warning: #f9ab00;
  --color-warning-light: #fef7e0;

  /* Neutrals */
  --color-bg: #f8f9fa;
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f3f4;
  --color-border: #dadce0;
  --color-border-light: #e8eaed;
  --color-text: #202124;
  --color-text-secondary: #3c4043;
  --color-text-muted: #6b7280;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.12);
  --shadow-xl: 0 8px 40px rgba(0,0,0,0.16);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 64px;

  /* Denomination colors (matching real currency) */
  --denom-500: #6b7280;
  --denom-500-bg: #f3f4f6;
  --denom-200: #ca8a04;
  --denom-200-bg: #fefce8;
  --denom-100: #7c3aed;
  --denom-100-bg: #f5f3ff;
  --denom-50: #2563eb;
  --denom-50-bg: #eff6ff;
  --denom-20: #65a30d;
  --denom-20-bg: #f7fee7;
  --denom-10: #b45309;
  --denom-10-bg: #fffbeb;
  --denom-5: #9ca3af;
  --denom-5-bg: #f9fafb;
  --denom-2: #6b7280;
  --denom-2-bg: #f3f4f6;
  --denom-1: #d97706;
  --denom-1-bg: #fffbeb;
}

/* ---------- Dark Theme ---------- */
[data-theme="dark"] {
  --color-primary: #8ab4f8;
  --color-primary-dark: #669df6;
  --color-primary-light: #1a2744;
  --color-accent: #ffb74d;
  --color-accent-light: #3d2e1a;

  --color-success: #81c995;
  --color-success-light: #1a3327;
  --color-danger: #f28b82;
  --color-danger-light: #3c2020;
  --color-warning: #fdd663;
  --color-warning-light: #3d3214;

  --color-bg: #121212;
  --color-bg-alt: #1e1e1e;
  --color-surface: #1e1e1e;
  --color-surface-hover: #2a2a2a;
  --color-border: #3c4043;
  --color-border-light: #2d2d2d;
  --color-text: #e8eaed;
  --color-text-secondary: #d2d4d8;
  --color-text-muted: #9aa0a6;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 2px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-xl: 0 8px 40px rgba(0,0,0,0.5);

  --denom-500-bg: #1f2937;
  --denom-200-bg: #2d2816;
  --denom-100-bg: #1e1533;
  --denom-50-bg: #172040;
  --denom-20-bg: #1a2e12;
  --denom-10-bg: #2d2212;
  --denom-5-bg: #1f2327;
  --denom-2-bg: #1f2937;
  --denom-1-bg: #2d2212;
}

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

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

@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;
  }
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, button, textarea, select {
  font: inherit;
}

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-tight);
  color: var(--color-text);
  font-weight: 700;
}

/* ---------- Accessibility ---------- */
.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;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  z-index: 10000;
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-sm);
  text-decoration: none;
  color: #fff;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--space-xl); }
}

/* ---------- Header / Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

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

@media (min-width: 768px) {
  .nav-inner { padding: 0 var(--space-xl); }
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.logo:hover { text-decoration: none; color: var(--color-text); }

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: 800;
}

.logo-text-accent { color: var(--color-primary); }

/* Desktop Navigation */
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-xs);
}

@media (min-width: 1024px) {
  .nav-links { display: flex; }
}

.nav-link {
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: color var(--transition-base), background var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* Nav dropdown */
.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-dropdown > .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  z-index: 1000;
  padding: var(--space-xs) 0;
}

.nav-dropdown:hover .nav-dropdown-content,
.nav-dropdown:focus-within .nav-dropdown-content {
  display: block;
}

.nav-dropdown-content a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-base), background var(--transition-base);
}

.nav-dropdown-content a:hover,
.nav-dropdown-content a:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* Blog card category */
.blog-card-category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

/* Nav right actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Dark mode toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: background var(--transition-base), color var(--transition-base);
  font-size: var(--font-size-lg);
}

.theme-toggle:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: inline; }
[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Hamburger button */
.hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background var(--transition-base);
}

.hamburger:hover { background: var(--color-surface-hover); }

@media (min-width: 1024px) {
  .hamburger { display: none; }
}

.hamburger-icon {
  width: 22px;
  height: 16px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}

.hamburger.is-active .hamburger-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-active .hamburger-icon span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Overlay */
.mobile-nav {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  z-index: 999;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
  padding: var(--space-lg);
}

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

@media (min-width: 1024px) {
  .mobile-nav { display: none; }
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-md) var(--space-lg);
  color: var(--color-text);
  font-size: var(--font-size-lg);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition-base);
  text-decoration: none;
}

.mobile-nav-link:hover,
.mobile-nav-link:focus-visible {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* Body scroll lock when mobile nav open */
body.nav-open {
  overflow: hidden;
}

/* ---------- Hero Section ---------- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: var(--space-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  opacity: 0.92;
  max-width: 800px;
  margin: 0 auto var(--space-lg);
}

.trust-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  white-space: nowrap;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-size: var(--font-size-lg);
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  box-shadow: 0 4px 14px rgba(255,152,0,0.4);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,152,0,0.5);
  background: var(--color-accent-dark);
  color: #fff;
  text-decoration: none;
}

@media (min-width: 768px) {
  .hero { padding: var(--space-3xl) 0; }
  .hero h1 { font-size: var(--font-size-4xl); }
  .hero-subtitle { font-size: var(--font-size-lg); }
  .trust-badge { font-size: var(--font-size-sm); }
}

@media (min-width: 1024px) {
  .hero h1 { font-size: 2.75rem; }
}

/* ---------- Sections (General) ---------- */
.section {
  padding: var(--space-2xl) 0;
  scroll-margin-top: calc(var(--nav-height) + var(--space-md));
}

.section-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  border: 1px solid var(--color-border-light);
}

@media (min-width: 768px) {
  .section-card { padding: var(--space-xl) var(--space-2xl); }
}

.section-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-title-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .section-title { font-size: var(--font-size-3xl); }
}

/* ---------- Calculator Section ---------- */
.calculator-wrapper {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.calculator-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
}

.calculator-header h2 {
  font-size: var(--font-size-xl);
  color: #fff;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .calculator-header h2 { font-size: var(--font-size-2xl); }
}

.calc-dark-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: #fff;
  background: rgba(255,255,255,0.2);
  transition: background var(--transition-base);
  font-size: var(--font-size-base);
}

.calc-dark-toggle:hover { background: rgba(255,255,255,0.3); }

.calculator-body {
  padding: var(--space-lg);
}

@media (min-width: 768px) {
  .calculator-body { padding: var(--space-xl); }
}

/* Denomination Grid */
.denom-grid {
  display: grid;
  gap: 1px;
  background: var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.denom-grid-header {
  display: grid;
  grid-template-columns: 1fr 120px 1fr;
  gap: 1px;
  background: var(--color-border-light);
}

.denom-grid-header > div {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-align: center;
}

.denom-grid-header > div:first-child { text-align: left; }
.denom-grid-header > div:last-child { text-align: right; }

.denom-row {
  display: grid;
  grid-template-columns: 1fr 120px 1fr;
  gap: 1px;
  background: var(--color-border-light);
  transition: background var(--transition-fast);
}

.denom-row > div {
  background: var(--color-surface);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  transition: background var(--transition-fast);
}

.denom-row:nth-child(even) > div {
  background: var(--color-bg);
}

.denom-row.is-active > div {
  background: var(--color-primary-light) !important;
}

.denom-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: var(--font-size-base);
}

.denom-icon {
  font-size: var(--font-size-lg);
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

.denom-type {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
  margin-left: var(--space-xs);
}

/* Input field */
.denom-input-wrap {
  justify-content: center;
}

.denom-input {
  width: 100%;
  max-width: 100px;
  padding: var(--space-sm) var(--space-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: 16px; /* prevent iOS zoom */
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  -webkit-appearance: none;
  -moz-appearance: textfield;
}

.denom-input::-webkit-outer-spin-button,
.denom-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.denom-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
  outline: none;
}

.denom-input::placeholder {
  color: var(--color-text-muted);
  font-weight: 400;
}

/* Subtotal */
.denom-subtotal {
  justify-content: flex-end;
  font-weight: 700;
  font-size: var(--font-size-base);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

/* Mobile adjustments for grid */
@media (max-width: 480px) {
  .denom-grid-header > div {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-xs);
  }
  .denom-row > div {
    padding: var(--space-sm);
  }
  .denom-label {
    font-size: var(--font-size-sm);
  }
  .denom-type { display: none; }
  .denom-input {
    max-width: 80px;
    padding: var(--space-xs) var(--space-xs);
  }
  .denom-subtotal {
    font-size: var(--font-size-sm);
  }
  .denom-grid-header,
  .denom-row {
    grid-template-columns: 1fr 90px 1fr;
  }
}

/* ---------- Grand Total ---------- */
.grand-total {
  background: linear-gradient(135deg, var(--color-success) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  margin-top: var(--space-lg);
}

.grand-total-label {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.9;
  margin-bottom: var(--space-xs);
}

.grand-total-amount {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  transition: transform var(--transition-base);
}

@media (min-width: 768px) {
  .grand-total-amount { font-size: var(--font-size-4xl); }
}

.grand-total-words {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  margin-top: var(--space-sm);
  font-style: italic;
}

.total-meta {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.total-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ---------- Statistics Panel ---------- */
.stats-panel {
  margin-top: var(--space-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stats-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg);
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: background var(--transition-base);
}

.stats-toggle:hover {
  background: var(--color-surface-hover);
}

.stats-toggle-icon {
  transition: transform var(--transition-base);
  font-size: var(--font-size-sm);
}

.stats-toggle.is-open .stats-toggle-icon {
  transform: rotate(180deg);
}

.stats-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.stats-content.is-open {
  max-height: 600px;
}

.stats-inner {
  padding: var(--space-lg);
}

.stats-bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.stat-bar-row {
  display: grid;
  grid-template-columns: 60px 1fr 50px;
  gap: var(--space-sm);
  align-items: center;
  font-size: var(--font-size-sm);
}

.stat-bar-label {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.stat-bar-track {
  height: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.stat-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
  min-width: 0;
}

.stat-bar-pct {
  text-align: right;
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.stats-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
}

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

.stat-item-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.stat-item-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ---------- Action Buttons ---------- */
.action-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

@media (min-width: 768px) {
  .action-buttons {
    grid-template-columns: repeat(5, 1fr);
  }
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  min-height: 44px;
  text-align: center;
}

.action-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.action-btn:active {
  transform: translateY(0);
}

.btn-reset {
  background: var(--color-danger-light);
  color: var(--color-danger);
}
.btn-reset:hover { background: var(--color-danger); color: #fff; }

.btn-print {
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.btn-print:hover { background: var(--color-primary); color: #fff; }

.btn-pdf {
  background: var(--color-success-light);
  color: var(--color-success);
}
.btn-pdf:hover { background: var(--color-success); color: #fff; }

.btn-copy {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}
.btn-copy:hover { background: var(--color-accent); color: #fff; }

.btn-share {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}
.btn-share:hover { background: var(--color-primary-dark); color: #fff; }

/* ---------- History Panel ---------- */
.history-panel {
  margin-top: var(--space-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.history-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg);
  color: var(--color-text);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-base);
}

.history-toggle:hover { background: var(--color-surface-hover); }

.history-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.history-content.is-open {
  max-height: 500px;
}

.history-inner {
  padding: var(--space-lg);
}

.history-empty {
  text-align: center;
  color: var(--color-text-muted);
  padding: var(--space-xl) 0;
  font-size: var(--font-size-sm);
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  transition: background var(--transition-base);
}

.history-item:hover {
  background: var(--color-primary-light);
}

.history-item-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.history-item-total {
  font-weight: 700;
  color: var(--color-success);
  font-size: var(--font-size-lg);
}

.history-item-summary {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.history-clear-btn {
  display: block;
  width: 100%;
  padding: var(--space-sm);
  text-align: center;
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg);
  transition: background var(--transition-base);
  cursor: pointer;
}

.history-clear-btn:hover {
  background: var(--color-danger-light);
}

/* ---------- Content / How-To Section ---------- */
.content-block {
  line-height: var(--line-height-relaxed);
  text-align: justify;
}

.content-block h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

.content-block h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.content-block p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
  text-align: justify;
}

.content-block strong {
  color: var(--color-text);
}

.example-box {
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-md) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: justify;
}

.example-box code {
  font-family: var(--font-mono);
  background: rgba(26,115,232,0.1);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
}

@media (min-width: 768px) {
  .content-block h2 { font-size: var(--font-size-3xl); }
  .content-block h3 { font-size: var(--font-size-2xl); }
}

/* ---------- FAQ Section ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--color-text);
  text-align: left;
  background: var(--color-surface);
  cursor: pointer;
  transition: background var(--transition-base);
  gap: var(--space-md);
}

.faq-question:hover {
  background: var(--color-bg);
}

.faq-icon {
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  transition: transform var(--transition-base);
  color: var(--color-text-muted);
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-sm);
  text-align: justify;
}

.faq-item.is-open .faq-answer {
  max-height: 300px;
}

/* ---------- Currency Quick Reference Grid ---------- */
.currency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .currency-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

.currency-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

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

.currency-card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.currency-card-value {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.currency-card-type {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.currency-card-status {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.status-active {
  background: var(--color-success-light);
  color: var(--color-success);
}

/* ---------- Blog Grid ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .blog-grid { grid-template-columns: repeat(3, 1fr); }
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.blog-card-thumb {
  width: 100%;
  height: 160px;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--color-primary);
}

.blog-card-body {
  padding: var(--space-lg);
}

.blog-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-md);
  text-align: justify;
}

.blog-card-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.blog-card-link:hover {
  gap: var(--space-sm);
}

.view-all-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition-base), transform var(--transition-base);
}

.view-all-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  color: #fff;
  text-decoration: none;
}

/* ---------- Trust Section ---------- */
.trust-section {
  text-align: center;
}

.trust-section p {
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-lg);
  line-height: var(--line-height-relaxed);
  text-align: justify;
}

.trust-indicators {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.trust-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-success-light);
  color: var(--color-success);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #1a1a2e;
  color: #e0e0e0;
  padding: var(--space-3xl) 0 0;
}

[data-theme="dark"] .site-footer {
  background: #0a0a0f;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer-brand p {
  color: #9e9e9e;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-top: var(--space-sm);
}

.footer-heading {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: #fff;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  color: #9e9e9e;
  font-size: var(--font-size-sm);
  transition: color var(--transition-base);
  text-decoration: none;
}

.footer-link:hover {
  color: #fff;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: var(--space-lg) 0;
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: #9e9e9e;
}

.footer-bottom .disclaimer {
  font-size: var(--font-size-xs);
  color: #6e6e6e;
  margin-top: var(--space-sm);
}

/* ---------- Toast Notification ---------- */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: 10000;
  white-space: nowrap;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ---------- Confirmation Dialog ---------- */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.dialog-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.dialog-box {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  text-align: center;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.dialog-overlay.is-visible .dialog-box {
  transform: scale(1);
}

.dialog-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.dialog-message {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
}

.dialog-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.dialog-btn {
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  min-height: 44px;
  transition: background var(--transition-base);
}

.dialog-btn-cancel {
  background: var(--color-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.dialog-btn-cancel:hover {
  background: var(--color-surface-hover);
}

.dialog-btn-confirm {
  background: var(--color-danger);
  color: #fff;
}

.dialog-btn-confirm:hover {
  background: #c62828;
}

/* ---------- Print Styles ---------- */
@media print {
  .site-header,
  .hero,
  .mobile-nav,
  .action-buttons,
  .stats-panel,
  .history-panel,
  .site-footer,
  .toast,
  .dialog-overlay,
  .theme-toggle,
  .calc-dark-toggle,
  .nav-actions,
  .hamburger,
  .hero-cta,
  .trust-badges,
  .blog-section,
  .trust-section-wrap,
  .skip-link,
  .ad-slot { display: none !important; }

  body {
    background: #fff !important;
    color: #000 !important;
    font-size: 12pt;
  }

  .section-card,
  .calculator-wrapper {
    box-shadow: none !important;
    border: 1px solid #ccc !important;
    break-inside: avoid;
  }

  .grand-total {
    background: #f0f0f0 !important;
    color: #000 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .denom-input {
    border: 1px solid #999 !important;
  }

  .calculator-header {
    background: #333 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  a { color: #000 !important; }
  a::after { content: none !important; }

  /* Article-specific print */
  .share-bar,
  .toc-mobile,
  .toc-sidebar,
  .related-articles {
    display: none !important;
  }

  .article-layout {
    display: block !important;
  }

  .comparison-table,
  .credentials-table {
    font-size: 10pt;
  }
}

/* ---------- E-E-A-T Components ---------- */

/* Content byline / meta strip */
.content-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm) var(--space-lg);
  padding: var(--space-md) 0;
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.content-meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.content-meta-label {
  font-weight: 600;
  color: var(--color-text);
}

/* Source citation box */
.source-citation {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  font-size: var(--font-size-sm);
}

.source-citation-title {
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.source-citation a {
  word-break: break-all;
}

.source-citation ul {
  margin-top: var(--space-sm);
  padding-left: var(--space-lg);
  list-style: disc;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.source-citation li {
  list-style: disc;
  color: var(--color-text-secondary);
}

/* Inline source reference */
.source-ref {
  font-size: var(--font-size-xs);
  vertical-align: super;
  line-height: 0;
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  cursor: help;
}

.source-ref:hover {
  text-decoration: underline;
}

/* Key insight / data callout */
.data-callout {
  background: var(--color-warning-light);
  border: 1px solid var(--color-warning);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  text-align: justify;
}

.data-callout-title {
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-base);
}

.data-callout p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-relaxed);
}

.data-callout p:last-child {
  margin-bottom: 0;
}

/* Case study / anecdote box */
.case-study {
  background: linear-gradient(135deg, #fdf6ec 0%, #fef9f0 100%);
  border: 1px solid #e0c88a;
  border-left: 5px solid #c5960c;
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  text-align: justify;
  position: relative;
}

.case-study-title {
  font-weight: 700;
  color: #8b6914;
  margin-bottom: var(--space-md);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.case-study p {
  color: #4a3c1f;
  font-size: var(--font-size-base);
  line-height: 1.75;
  margin-bottom: var(--space-md);
  font-style: italic;
}

.case-study p:last-of-type:not(.case-study-meta) {
  margin-bottom: var(--space-md);
}

.case-study .case-study-meta {
  font-style: normal;
  font-size: var(--font-size-sm);
  color: #6b5a2e;
  margin-bottom: 0;
  padding-top: var(--space-sm);
  border-top: 1px solid #e0c88a;
}

.case-study .case-study-meta a {
  color: #8b6914;
  font-weight: 600;
}

[data-theme="dark"] .case-study {
  background: linear-gradient(135deg, #2a2415 0%, #1f1c14 100%);
  border-color: #5a4a25;
  border-left-color: #c5960c;
}

[data-theme="dark"] .case-study-title {
  color: #e0b84a;
}

[data-theme="dark"] .case-study p {
  color: #d4c8a8;
}

[data-theme="dark"] .case-study .case-study-meta {
  color: #b0a07a;
  border-color: #5a4a25;
}

[data-theme="dark"] .case-study .case-study-meta a {
  color: #e0b84a;
}

/* Pro-tip / expert box */
.expert-tip {
  background: var(--color-success-light);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  text-align: justify;
}

.expert-tip-title {
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.expert-tip p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

/* Comparison table */
/* Editorial / trust badge strip */
.editorial-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  margin: var(--space-lg) 0;
  border: 1px solid var(--color-border-light);
}

.editorial-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.editorial-badge strong {
  color: var(--color-text);
}

/* ---------- Author Cards ---------- */
.author-cards {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.author-card {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  flex: 1 1 280px;
  padding: var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.author-card-reviewer {
  border-left: 3px solid var(--color-success);
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.author-card-reviewer .author-avatar {
  background: var(--color-success);
}

.author-name {
  font-weight: 700;
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: 2px;
}

.author-name a {
  color: var(--color-text);
  text-decoration: none;
}

.author-name a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.reviewer-badge {
  display: inline-block;
  background: var(--color-success);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 9999px;
  vertical-align: middle;
  margin-left: var(--space-xs);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.author-role {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.author-bio-short {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Full author card (About page) */
.author-card-full {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
}

.author-card-full h3 {
  margin-top: 0;
}

.author-avatar-large {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.author-role-full {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  font-style: italic;
}

/* Coming soon page style */
.coming-soon-page {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.coming-soon-page h1 {
  font-size: var(--font-size-3xl);
}

.coming-soon-icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
}

@media (max-width: 600px) {
  .author-card-full {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* ---------- AI Disclosure ---------- */
.ai-disclosure {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-text-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0 var(--space-lg);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.ai-disclosure strong {
  color: var(--color-text);
}

.ai-disclosure a {
  color: var(--color-primary);
}

/* ---------- Ad Disclosure ---------- */
.ad-disclosure {
  font-size: 11px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

/* ---------- Content Changelog ---------- */
.content-changelog {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0;
  font-size: var(--font-size-xs);
}

.changelog-title {
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
}

.changelog-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.changelog-list li {
  padding-left: var(--space-md);
  position: relative;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.changelog-list li::before {
  content: "\2022";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.changelog-list li strong {
  color: var(--color-text);
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ---------- Content Figures / Images ---------- */
.content-figure {
  margin: var(--space-lg) 0;
  padding: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.content-figure .content-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  object-fit: cover;
}

.content-figure figcaption {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.content-figure figcaption em {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--color-text-muted, #999);
}

/* Float right on larger screens */
@media (min-width: 768px) {
  .content-figure-right {
    float: right;
    max-width: 420px;
    margin: 0 0 var(--space-md) var(--space-lg);
  }
}

/* Currency photos side-by-side */
.currency-photos {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .currency-photos {
    grid-template-columns: 1fr 1fr;
  }
}

.currency-photos .content-figure {
  margin: 0;
}

.content-figure-inline {
  margin: 0;
}

/* Dark mode overrides for images */
[data-theme="dark"] .content-figure {
  border-color: var(--color-border);
  background: var(--color-surface);
}

[data-theme="dark"] .content-figure figcaption {
  background: var(--color-bg);
  border-color: var(--color-border);
}

/* ---------- Contact Form ---------- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.form-label .required {
  color: var(--color-danger);
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  box-sizing: border-box;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23666'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

.form-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-xl);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-base);
  align-self: flex-start;
}

.form-submit:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.form-submit:active {
  transform: translateY(0);
}

/* Contact info blocks */
.contact-info-block {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.contact-info-block:last-child {
  border-bottom: none;
}

.contact-info-block h3 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

/* ---------- Credentials Table ---------- */
.credentials-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-sm) 0 var(--space-md);
  font-size: var(--font-size-sm);
}

.credentials-table td {
  padding: var(--space-xs) var(--space-sm);
  vertical-align: top;
  border-bottom: 1px solid var(--color-border-light);
}

.credentials-table td:first-child {
  white-space: nowrap;
  width: 130px;
  color: var(--color-text-secondary);
  font-weight: 500;
}

@media (max-width: 600px) {
  .credentials-table td:first-child {
    width: auto;
    white-space: normal;
  }
}

/* ---------- Editorial Steps ---------- */
.editorial-steps {
  counter-reset: editorial;
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
}

.editorial-steps li {
  position: relative;
  padding: var(--space-sm) 0 var(--space-sm) var(--space-xl);
  border-left: 2px solid var(--color-primary-light);
  margin-bottom: var(--space-sm);
}

.editorial-steps li::before {
  counter-increment: editorial;
  content: counter(editorial);
  position: absolute;
  left: -13px;
  top: var(--space-sm);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Author Photo ---------- */
.author-photo-wrap {
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.author-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-primary-light);
}

/* Dark mode overrides for forms */
[data-theme="dark"] .form-input {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

[data-theme="dark"] .form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
}

[data-theme="dark"] select.form-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23aaa'/%3E%3C/svg%3E");
}

/* ============================================================
   ARTICLE PAGE STYLES
   ============================================================ */

/* Article layout with sidebar TOC */
.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr 280px;
    padding: 0 var(--space-lg);
  }
}

/* Article header */
.article-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.article-header h1 {
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .article-header h1 {
    font-size: var(--font-size-4xl);
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  align-items: center;
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.article-category-tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-category-tag:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Table of Contents — Sidebar */
.toc-sidebar {
  position: relative;
}

.toc-card {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-md));
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  max-height: calc(100vh - var(--nav-height) - var(--space-xl));
  overflow-y: auto;
}

.toc-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list li {
  margin-bottom: 2px;
}

.toc-list a {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.toc-list a:hover,
.toc-list a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-left-color: var(--color-primary);
}

.toc-list .toc-h3 {
  padding-left: var(--space-lg);
  font-size: var(--font-size-xs);
}

/* Mobile TOC (collapsible) */
.toc-mobile {
  display: block;
  margin-bottom: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
}

.toc-mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toc-mobile-content {
  display: none;
  padding-top: var(--space-md);
}

.toc-mobile.is-open .toc-mobile-content {
  display: block;
}

@media (min-width: 1024px) {
  .toc-mobile { display: none; }
  .toc-sidebar { display: block; }
}

@media (max-width: 1023px) {
  .toc-sidebar { display: none; }
}

/* Author bio box (end of article) */
.author-bio-box {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin: var(--space-2xl) 0;
}

.author-bio-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-xl);
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.author-bio-name {
  font-weight: 700;
  font-size: var(--font-size-lg);
  margin-bottom: 2px;
}

.author-bio-role {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.author-bio-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  margin: 0;
}

.author-bio-link {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-top: var(--space-xs);
  display: inline-block;
}

@media (max-width: 600px) {
  .author-bio-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* Social share buttons */
.share-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-xl) 0;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  align-items: center;
}

.share-label {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-right: var(--space-sm);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  background: var(--color-surface);
  font-family: inherit;
}

.share-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.share-btn--twitter:hover { border-color: #1da1f2; color: #1da1f2; }
.share-btn--whatsapp:hover { border-color: #25d366; color: #25d366; }
.share-btn--linkedin:hover { border-color: #0077b5; color: #0077b5; }

/* Related articles grid */
.related-articles {
  margin: var(--space-2xl) 0;
}

.related-articles h2 {
  margin-bottom: var(--space-lg);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 600px) {
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.related-card {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-base);
}

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

.related-card-title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  font-size: var(--font-size-base);
}

.related-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Article comparison table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: var(--font-size-sm);
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.comparison-table th {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: var(--font-size-xs);
}

.comparison-table tr:hover td {
  background: var(--color-bg);
}

/* Article content lists */
.content-block ul,
.content-block ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-xl);
  color: var(--color-text-secondary);
}

.content-block li {
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-relaxed);
}

/* Reviewed-by inline badge */
.reviewed-by {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  color: var(--color-success);
  font-weight: 500;
}

/* ---------- Responsive Table Wrapper ---------- */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-md) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.table-responsive table {
  margin: 0;
  border: none;
  min-width: 480px;
}

/* ---------- Mobile Optimization — Global ---------- */

/* ── Touch Targets ── */
/* Ensure all interactive elements meet Google's 48px minimum */
@media (max-width: 768px) {
  /* Share buttons — increase tap size */
  .share-btn {
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
  }

  /* TOC links on mobile — bigger tap area */
  .toc-list a {
    padding: var(--space-sm) var(--space-md);
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  /* Mobile TOC toggle — bigger tap area */
  .toc-mobile-toggle {
    min-height: 48px;
    padding: var(--space-sm) 0;
  }

  /* Theme toggle — ensure 44px */
  .theme-toggle {
    width: 44px;
    height: 44px;
  }

  /* Editorial badges — give breathing room */
  .editorial-badge {
    font-size: var(--font-size-sm);
    padding: var(--space-xs) 0;
    min-height: 36px;
  }

  /* FAQ questions — bigger tap target */
  .faq-question {
    min-height: 48px;
    padding: var(--space-md);
  }

  /* Stats toggle — bigger tap target */
  .stats-toggle {
    min-height: 48px;
  }

  /* History toggle — bigger tap target */
  .history-toggle {
    min-height: 48px;
  }

  /* Related article cards — bigger tap target */
  .related-card {
    padding: var(--space-lg);
  }

  /* Article category tag — bigger tap target */
  .article-category-tag {
    padding: var(--space-xs) var(--space-md);
    min-height: 32px;
    display: inline-flex;
    align-items: center;
  }
}

/* ── Font Size Fixes (prevent too-small text on mobile) ── */
@media (max-width: 768px) {
  /* Override xs font-size elements to be at least 13px on mobile */
  .ad-disclosure {
    font-size: 13px;
  }

  .ai-disclosure {
    font-size: var(--font-size-sm);
  }

  .content-changelog {
    font-size: var(--font-size-sm);
  }

  .author-bio-short,
  .author-role,
  .reviewer-badge,
  .reviewed-by {
    font-size: var(--font-size-sm);
  }

  .editorial-badge {
    font-size: var(--font-size-sm);
  }

  .stat-bar-pct,
  .stat-item-label {
    font-size: var(--font-size-sm);
  }

  .comparison-table {
    font-size: var(--font-size-sm);
  }

  .comparison-table th {
    font-size: var(--font-size-sm);
  }

  .content-figure figcaption {
    font-size: var(--font-size-sm);
  }

  .content-figure figcaption em {
    font-size: 0.8rem;
  }

  /* Denom type label — keep xs hidden on small screens (already done at 480px) */
  .toc-list .toc-h3 {
    font-size: var(--font-size-sm);
    padding-left: var(--space-md);
  }
}

/* ── Calculator Mobile Enhancements ── */
@media (max-width: 600px) {
  /* Make denomination rows single-column on very small screens */
  .denom-grid-header,
  .denom-row {
    grid-template-columns: 1fr 80px auto;
  }

  .denom-input {
    max-width: 72px;
    padding: var(--space-sm);
    font-size: 16px; /* prevent iOS zoom */
  }

  .denom-subtotal {
    font-size: var(--font-size-sm);
    padding-right: var(--space-sm);
  }

  /* Action buttons — 2 columns, bigger text */
  .action-buttons {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .action-btn {
    font-size: var(--font-size-sm);
    padding: var(--space-md) var(--space-sm);
    min-height: 48px;
  }

  /* Grand total — tighter on mobile */
  .grand-total {
    padding: var(--space-lg);
  }

  .grand-total-amount {
    font-size: var(--font-size-2xl);
  }

  /* Stats bar — stack label better */
  .stat-bar-row {
    grid-template-columns: 50px 1fr 42px;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
  }
}

/* ── Article Mobile Enhancements ── */
@media (max-width: 768px) {
  /* Article header — smaller heading on mobile */
  .article-header h1 {
    font-size: var(--font-size-2xl);
    word-break: break-word;
  }

  /* Article meta — stack vertically */
  .article-meta {
    flex-direction: column;
    gap: var(--space-xs);
  }

  /* Author bio box — already stacks at 600px, ensure padding */
  .author-bio-box {
    padding: var(--space-md);
  }

  .author-bio-avatar {
    width: 56px;
    height: 56px;
    font-size: var(--font-size-lg);
  }

  /* Share bar — wrap nicely */
  .share-bar {
    justify-content: center;
  }

  .share-label {
    width: 100%;
    text-align: center;
    margin-right: 0;
    margin-bottom: var(--space-xs);
  }

  /* Example boxes — full width */
  .example-box {
    padding: var(--space-md);
    font-size: var(--font-size-sm);
  }

  /* Expert tip — snug */
  .expert-tip {
    padding: var(--space-md);
  }

  /* Sources list — reduce padding */
  .sources-list {
    padding-left: var(--space-md);
  }

  /* Content block lists — tighter */
  .content-block ul,
  .content-block ol {
    padding-left: var(--space-lg);
  }
}

/* ── Header / Logo Mobile Fix ── */
@media (max-width: 480px) {
  .logo {
    font-size: var(--font-size-base);
    gap: var(--space-xs);
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-base);
  }

  /* Nav inner — tighter padding */
  .nav-inner {
    padding: 0 var(--space-sm);
  }
}

@media (max-width: 360px) {
  .logo {
    font-size: var(--font-size-sm);
  }

  .logo-icon {
    width: 28px;
    height: 28px;
    font-size: var(--font-size-sm);
  }
}

/* ── Footer Mobile Fix ── */
@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }
}

/* ── Horizontal Overflow Prevention ── */
html, body {
  overflow-x: hidden;
  max-width: 100vw;
}

/* Ensure images never cause overflow */
img, video, iframe, embed, object {
  max-width: 100%;
}

/* Prevent long words from causing overflow */
.article-content,
.content-block,
.section-intro,
.faq-answer,
.author-bio-text {
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}

/* Prevent long URLs in content from breaking layout */
.article-content a,
.content-block a {
  word-break: break-all;
}

/* ── Smooth Scroll Offset for Sticky Header ── */
html {
  scroll-padding-top: calc(var(--nav-height) + var(--space-md));
}

/* ── Safe Area Insets (notched phones) ── */
@supports (padding: max(0px)) {
  .site-header .nav-inner {
    padding-left: max(var(--space-md), env(safe-area-inset-left));
    padding-right: max(var(--space-md), env(safe-area-inset-right));
  }

  .site-footer {
    padding-bottom: max(var(--space-xl), env(safe-area-inset-bottom));
  }
}

/* ---------- Ad Slots ---------- */
.ad-slot {
  margin: var(--space-xl) 0;
  text-align: center;
  min-height: 90px;
  overflow: hidden;
}