/**
 * UK Calc Theme Assets - Modern Fintech-Minimal Design Tokens & Styles
 * Pure standalone modern CSS. No external CSS frameworks or runtime npm build required.
 * Strict adherence to TRD §8 & CONTRACTS §6:
 *  - Colors: Navy #0F172A, Interactive Blue #2563EB, Net Pay Emerald #059669, Deduction Red #DC2626
 *  - Neutrals: Slate 50-900 (#F8FAFC, #FFFFFF, #E2E8F0, #64748B, #334155, #0F172A)
 *  - Font: Inter with tabular numerals (font-feature-settings: 'tnum' 1, font-variant-numeric: tabular-nums)
 *  - Radii: 12px - 14px cards, 10px inputs
 *  - Mobile-first responsive layout (down to 360px viewport with zero horizontal overflow)
 *  - Minimum 48px touch targets
 */

/* Self-Hosted Inter Font (Eliminates External Network Requests) */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-latin-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-latin-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/inter-latin-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/inter-latin-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('../fonts/inter-latin-800.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* Color Palette */
  --ukc-navy-950: #020617;
  --ukc-navy-900: #0F172A;
  --ukc-navy-800: #1E293B;
  --ukc-slate-700: #334155;
  --ukc-slate-600: #475569;
  --ukc-slate-500: #64748B;
  --ukc-slate-400: #94A3B8;
  --ukc-slate-300: #CBD5E1;
  --ukc-slate-200: #E2E8F0;
  --ukc-slate-100: #F1F5F9;
  --ukc-slate-50: #F8FAFC;
  --ukc-white: #FFFFFF;

  /* Accent & Functional Colors */
  --ukc-blue-600: #2563EB;
  --ukc-blue-700: #1D4ED8;
  --ukc-blue-50: #EFF6FF;
  
  --ukc-emerald-600: #059669;
  --ukc-emerald-700: #047857;
  --ukc-emerald-50: #ECFDF5;

  --ukc-red-600: #DC2626;
  --ukc-red-700: #B91C1C;
  --ukc-red-50: #FEF2F2;

  --ukc-amber-600: #D97706;
  --ukc-amber-50: #FFFBEB;

  /* Typography */
  --ukc-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  
  /* Sizing & Radius */
  --ukc-radius-card: 14px;
  --ukc-radius-input: 10px;
  --ukc-radius-sm: 6px;
  --ukc-radius-full: 9999px;

  /* Shadows */
  --ukc-shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --ukc-shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --ukc-shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 12px 24px -4px rgba(15, 23, 42, 0.06);
  --ukc-shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.25);

  /* Layout */
  --ukc-max-width: 1160px;
  --ukc-max-tool-width: 780px;
  --ukc-header-height: 68px;
}

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

html {
  font-family: var(--ukc-font-sans);
  background-color: var(--ukc-slate-50);
  color: var(--ukc-slate-700);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  font-feature-settings: 'tnum' 1;
  font-variant-numeric: tabular-nums;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--ukc-slate-50);
  overflow-x: hidden;
  width: 100%;
}

img, svg, picture, video {
  max-width: 100%;
  display: block;
}

a {
  color: var(--ukc-blue-600);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--ukc-blue-700);
  text-decoration: underline;
}

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

/* Accessibility: Skip Links & Focus States */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--ukc-navy-900);
  color: var(--ukc-white);
  padding: 0.75rem 1.25rem;
  border-radius: var(--ukc-radius-sm);
  z-index: 9999;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--ukc-blue-600);
}

:focus-visible {
  outline: 2px solid var(--ukc-blue-600);
  outline-offset: 2px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--ukc-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 640px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ukc-slate-200);
  height: var(--ukc-header-height);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--ukc-navy-900);
}

.site-branding:hover {
  text-decoration: none;
}

.site-logo-icon {
  width: 36px;
  height: 36px;
  background-color: var(--ukc-navy-900);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ukc-white);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.05em;
  flex-shrink: 0;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ukc-navy-900);
}

.site-title span {
  color: var(--ukc-blue-600);
}

.site-nav {
  display: none;
}

@media (min-width: 900px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
  }

  .site-nav a {
    color: var(--ukc-slate-700);
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.5rem 0.25rem;
    border-bottom: 2px solid transparent;
    transition: all 0.15s ease;
  }

  .site-nav a:hover,
  .site-nav a.active {
    color: var(--ukc-blue-600);
    text-decoration: none;
    border-bottom-color: var(--ukc-blue-600);
  }
}

/* Mobile Nav Toggle (48px Touch Target) */
.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  background: transparent;
  border: 1px solid var(--ukc-slate-200);
  border-radius: var(--ukc-radius-sm);
  color: var(--ukc-navy-900);
  cursor: pointer;
  padding: 0;
}

@media (min-width: 900px) {
  .mobile-nav-toggle {
    display: none;
  }
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: var(--ukc-header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--ukc-white);
  border-top: 1px solid var(--ukc-slate-200);
  padding: 1.5rem;
  display: none;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
  z-index: 99;
}

.mobile-nav-drawer.is-open {
  display: flex;
}

.mobile-nav-drawer a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ukc-navy-900);
  border-bottom: 1px solid var(--ukc-slate-100);
  padding: 0.5rem 0;
}

/* Breadcrumbs */
.breadcrumbs-bar {
  padding: 0.75rem 0;
  font-size: 0.875rem;
  color: var(--ukc-slate-500);
  border-bottom: 1px solid var(--ukc-slate-200);
  background-color: var(--ukc-white);
}

.breadcrumbs-bar ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
}

.breadcrumbs-bar li::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--ukc-slate-400);
}

.breadcrumbs-bar li:last-child::after {
  content: "";
}

.breadcrumbs-bar a {
  color: var(--ukc-slate-600);
}

.breadcrumbs-bar a:hover {
  color: var(--ukc-blue-600);
}

.breadcrumbs-bar [aria-current="page"] {
  color: var(--ukc-navy-900);
  font-weight: 500;
}

/* Trust Badges & Callouts */
.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--ukc-emerald-50);
  border: 1px solid #A7F3D0;
  color: var(--ukc-emerald-700);
  padding: 0.375rem 0.875rem;
  border-radius: var(--ukc-radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.trust-badge svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.freshness-banner {
  background-color: var(--ukc-blue-50);
  border-left: 4px solid var(--ukc-blue-600);
  padding: 0.875rem 1.25rem;
  border-radius: 0 var(--ukc-radius-sm) var(--ukc-radius-sm) 0;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: var(--ukc-navy-900);
}

.freshness-banner strong {
  color: var(--ukc-blue-700);
}

/* Hero Section */
.hero {
  padding: 2.5rem 0 2rem;
}

@media (min-width: 768px) {
  .hero {
    padding: 3.5rem 0 2.5rem;
  }
}

.hero-title {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--ukc-navy-900);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .hero-title {
    font-size: 2.25rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 2.5rem;
  }
}

.hero-lead {
  font-size: 1.0625rem;
  color: var(--ukc-slate-600);
  max-width: 680px;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .hero-lead {
    font-size: 1.1875rem;
  }
}

/* Tool & Card Architecture */
.tool-container {
  max-width: var(--ukc-max-tool-width);
  margin: 0 auto 3rem;
}

.card {
  background-color: var(--ukc-white);
  border: 1px solid var(--ukc-slate-200);
  border-radius: var(--ukc-radius-card);
  box-shadow: var(--ukc-shadow-card);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card-padded {
  padding: 1.5rem;
}

@media (min-width: 640px) {
  .card-padded {
    padding: 2rem;
  }
}

/* Hub & Grid Cards */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }
}

.feature-card {
  background-color: var(--ukc-white);
  border: 1px solid var(--ukc-slate-200);
  border-radius: var(--ukc-radius-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.2s ease;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--ukc-blue-600);
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  text-decoration: none;
}

.feature-card .card-badge {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background-color: var(--ukc-slate-100);
  color: var(--ukc-slate-700);
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--ukc-navy-900);
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--ukc-slate-600);
  font-size: 0.9375rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.feature-card .card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ukc-blue-600);
  min-height: 48px;
}

/* Interactive Elements & Touch Targets (48px Min) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.625rem 1.25rem;
  border-radius: var(--ukc-radius-input);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--ukc-blue-600);
  color: var(--ukc-white);
}

.btn-primary:hover {
  background-color: var(--ukc-blue-700);
  color: var(--ukc-white);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--ukc-white);
  border-color: var(--ukc-slate-300);
  color: var(--ukc-slate-700);
}

.btn-secondary:hover {
  background-color: var(--ukc-slate-50);
  border-color: var(--ukc-slate-400);
  text-decoration: none;
}

/* Inputs & Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ukc-navy-900);
  margin-bottom: 0.375rem;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--ukc-slate-500);
  margin-top: 0.25rem;
}

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

.input-affix-wrapper .input-prefix {
  position: absolute;
  left: 1rem;
  font-weight: 600;
  color: var(--ukc-slate-500);
  pointer-events: none;
  font-size: 1.125rem;
}

.form-input {
  width: 100%;
  min-height: 48px;
  padding: 0.625rem 1rem;
  font-size: 1rem;
  color: var(--ukc-navy-900);
  background-color: var(--ukc-white);
  border: 1px solid var(--ukc-slate-300);
  border-radius: var(--ukc-radius-input);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

textarea.form-input {
  min-height: 120px;
  padding: 0.75rem 1rem;
  resize: vertical;
}

.input-affix-wrapper .form-input {
  padding-left: 2.25rem;
}

.form-input:focus {
  outline: none;
  border-color: var(--ukc-blue-600);
  box-shadow: var(--ukc-shadow-focus);
}

.form-input.has-error {
  border-color: var(--ukc-red-600);
  background-color: #fef2f2;
}

.form-input.has-error:focus {
  border-color: var(--ukc-red-600);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.field-error {
  display: block;
  font-size: 0.8125rem;
  color: var(--ukc-red-600);
  font-weight: 500;
  margin-top: 0.35rem;
}

.contact-layout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

@media (min-width: 820px) {
  .contact-layout-grid {
    grid-template-columns: 3fr 2fr;
    gap: 2.5rem;
  }
}

/* Segmented Control */
.segmented-control {
  display: flex;
  background-color: var(--ukc-slate-100);
  border-radius: var(--ukc-radius-input);
  padding: 0.25rem;
  gap: 0.25rem;
  min-height: 48px;
  align-items: center;
}

.segmented-control-item {
  flex: 1;
  text-align: center;
}

.segmented-control-btn {
  width: 100%;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: calc(var(--ukc-radius-input) - 2px);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ukc-slate-600);
  cursor: pointer;
  transition: all 0.15s ease;
}

.segmented-control-btn.is-active {
  background-color: var(--ukc-white);
  color: var(--ukc-navy-900);
  box-shadow: var(--ukc-shadow-sm);
}

/* Calculator Mount Shell */
.ukcalc-mount {
  min-height: 380px;
  background-color: var(--ukc-white);
  border: 1px solid var(--ukc-slate-200);
  border-radius: var(--ukc-radius-card);
  padding: 1.5rem;
  box-shadow: var(--ukc-shadow-card);
}

@media (min-width: 640px) {
  .ukcalc-mount {
    padding: 2rem;
  }
}

/* Key Facts GEO Box */
.key-facts-box {
  background-color: var(--ukc-white);
  border: 1px solid var(--ukc-slate-200);
  border-left: 5px solid var(--ukc-blue-600);
  border-radius: var(--ukc-radius-card);
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--ukc-shadow-sm);
}

.key-facts-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.key-facts-header h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ukc-navy-900);
}

.key-facts-list {
  list-style: none;
  display: grid;
  gap: 0.625rem;
}

.key-facts-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  color: var(--ukc-slate-700);
}

.key-facts-list li::before {
  content: "•";
  position: absolute;
  left: 0.25rem;
  color: var(--ukc-blue-600);
  font-weight: 900;
  font-size: 1.25rem;
  line-height: 1;
}

/* Reference & Band Tables */
.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
  border-radius: var(--ukc-radius-card);
  border: 1px solid var(--ukc-slate-200);
  background: var(--ukc-white);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
  min-width: 520px;
}

.data-table th, 
.data-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--ukc-slate-200);
}

.data-table th {
  background-color: var(--ukc-slate-100);
  color: var(--ukc-navy-900);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

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

.data-table tbody tr:hover {
  background-color: var(--ukc-slate-50);
}

.data-table td.num, 
.data-table th.num {
  text-align: right;
  font-feature-settings: 'tnum' 1;
}

.badge-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  background-color: var(--ukc-slate-100);
  color: var(--ukc-slate-700);
}

.badge-tag.badge-emerald {
  background-color: var(--ukc-emerald-50);
  color: var(--ukc-emerald-700);
}

.badge-tag.badge-red {
  background-color: var(--ukc-red-50);
  color: var(--ukc-red-600);
}

/* FAQ Accordion (<details>-based, no JS required) */
.faq-section {
  margin: 3rem 0;
}

.faq-section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ukc-navy-900);
  margin-bottom: 1.25rem;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--ukc-slate-200);
  border-radius: var(--ukc-radius-card);
  background-color: var(--ukc-white);
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.faq-item[open] {
  border-color: var(--ukc-slate-300);
}

.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ukc-navy-900);
  cursor: pointer;
  user-select: none;
  min-height: 48px;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ukc-blue-600);
  margin-left: 0.75rem;
  flex-shrink: 0;
}

.faq-item[open] .faq-summary::after {
  content: "−";
}

.faq-content {
  padding: 0 1.25rem 1.25rem;
  color: var(--ukc-slate-600);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Guide & Prose Typography */
.prose {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ukc-slate-700);
}

.prose h1, .prose h2, .prose h3, .prose h4 {
  color: var(--ukc-navy-900);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.prose h1 { font-size: 2.25rem; }
.prose h2 { font-size: 1.625rem; }
.prose h3 { font-size: 1.25rem; }

.prose p {
  margin-bottom: 1.25rem;
}

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

.prose li {
  margin-bottom: 0.375rem;
}

.prose blockquote {
  border-left: 4px solid var(--ukc-blue-600);
  padding: 0.75rem 1.25rem;
  background-color: var(--ukc-slate-100);
  border-radius: 0 var(--ukc-radius-sm) var(--ukc-radius-sm) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--ukc-navy-800);
}

/* Methodology & Sources Box */
.methodology-box {
  background-color: var(--ukc-slate-100);
  border: 1px solid var(--ukc-slate-200);
  border-radius: var(--ukc-radius-card);
  padding: 1.5rem;
  margin: 2.5rem 0;
}

.methodology-box h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ukc-navy-900);
  margin-bottom: 0.5rem;
}

.methodology-box p {
  font-size: 0.875rem;
  color: var(--ukc-slate-600);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.methodology-box ul {
  font-size: 0.875rem;
  color: var(--ukc-slate-600);
  padding-left: 1.25rem;
}

/* Footer Architecture */
.site-footer {
  margin-top: auto;
  background-color: var(--ukc-navy-950);
  color: var(--ukc-slate-400);
  padding: 3.5rem 0 2rem;
  border-top: 1px solid var(--ukc-navy-800);
  font-size: 0.875rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 2.5rem;
  }
}

.footer-col h4 {
  color: var(--ukc-white);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-links a {
  color: var(--ukc-slate-300);
  text-decoration: none;
  transition: color 0.15s ease;
  display: inline-block;
  min-height: 24px;
}

.footer-links a:hover {
  color: var(--ukc-white);
  text-decoration: underline;
}

.footer-disclaimer-box {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--ukc-navy-800);
  border-radius: var(--ukc-radius-card);
  padding: 1.25rem;
  margin-bottom: 2rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--ukc-slate-400);
}

.footer-disclaimer-box strong {
  color: var(--ukc-slate-200);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8125rem;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Accessible UK GDPR & Google AdSense Cookie Consent Banner */
.ukc-cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99999;
  background-color: var(--ukc-navy-950);
  border-top: 2px solid var(--ukc-blue-600);
  box-shadow: 0 -10px 25px -5px rgba(0, 0, 0, 0.35);
  padding: 1.25rem 1.5rem;
  color: var(--ukc-slate-200);
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: none;
}

.ukc-cookie-banner.is-visible {
  display: block;
  transform: translateY(0);
}

.ukc-cookie-container {
  max-width: var(--ukc-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: stretch;
}

@media (min-width: 900px) {
  .ukc-cookie-container {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.ukc-cookie-content {
  flex: 1;
}

.ukc-cookie-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ukc-white);
  margin: 0 0 0.375rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ukc-cookie-text {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--ukc-slate-300);
  margin: 0;
}

.ukc-cookie-text a {
  color: var(--ukc-blue-400);
  text-decoration: underline;
}

.ukc-cookie-text a:hover {
  color: var(--ukc-white);
}

.ukc-cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  align-items: center;
  flex-shrink: 0;
}

.ukc-cookie-btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--ukc-radius-btn);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.ukc-cookie-btn-accept {
  background-color: var(--ukc-blue-600);
  color: var(--ukc-white);
}

.ukc-cookie-btn-accept:hover {
  background-color: var(--ukc-blue-700);
}

.ukc-cookie-btn-reject {
  background-color: transparent;
  color: var(--ukc-slate-200);
  border-color: var(--ukc-slate-600);
}

.ukc-cookie-btn-reject:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--ukc-slate-400);
  color: var(--ukc-white);
}

.ukc-cookie-btn-link {
  background-color: transparent;
  color: var(--ukc-slate-400);
  font-size: 0.8125rem;
  padding: 0.5rem;
  text-decoration: underline;
}

.ukc-cookie-btn-link:hover {
  color: var(--ukc-slate-200);
}