/* ==========================================================================
   IDP IELTS UK (idpielts.uk) - Official Design System & Framework
   Primary: Official IDP Red (#E31837), Clean White, Slate & Neutral Accents
   Engineered for Top Search Engine Performance, AEO, GEO & Responsive UX
   ========================================================================== */

:root {
  --primary: #E31837;
  --primary-hover: #C0132B;
  --primary-light: #FFF1F2;
  --primary-subtle: #FFE4E6;
  --primary-dark: #880B1C;

  /* Official IDP Orange from Logo */
  --orange: #F48221;
  --orange-hover: #E06F12;
  --orange-light: #FFF7ED;
  --orange-subtle: #FFEDD5;
  --orange-dark: #C2410C;
  --shadow-orange: 0 8px 20px -4px rgba(244, 130, 33, 0.35);
  
  --secondary: #0F172A;
  --secondary-light: #1E293B;
  --secondary-muted: #334155;
  
  --accent-blue: #0284C7;
  --accent-blue-light: #E0F2FE;
  --accent-green: #10B981;
  --accent-green-light: #D1FAE5;
  --accent-gold: #F59E0B;
  
  --bg-page: #FFFFFF;
  --bg-subtle: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-contrast: #0B132B;
  
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-light: #64748B;
  --text-white: #FFFFFF;
  
  --border: #E2E8F0;
  --border-subtle: #F1F5F9;
  --border-hover: #CBD5E1;
  --border-focus: #E31837;
  
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 4px -1px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 12px -2px rgba(15, 23, 42, 0.08), 0 3px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 24px -4px rgba(15, 23, 42, 0.1), 0 8px 12px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 24px 36px -6px rgba(15, 23, 42, 0.14), 0 12px 18px -6px rgba(15, 23, 42, 0.08);
  --shadow-red: 0 8px 20px -4px rgba(227, 24, 55, 0.35);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --container-max: 1280px;
  --container-narrow: 980px;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Top Announcement Bar */
.announcement-bar {
  background: var(--secondary);
  color: #E2E8F0;
  font-size: 0.85rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.announcement-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.announcement-bar .info-pills {
  display: flex;
  align-items: center;
  gap: 16px;
}

.announcement-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #CBD5E1;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  background-color: var(--orange);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(244, 130, 33, 0.7);
  animation: pulse-orange 1.8s infinite;
}

@keyframes pulse-orange {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(244, 130, 33, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 7px rgba(244, 130, 33, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(244, 130, 33, 0); }
}

.announcement-bar a {
  color: #FED7AA;
  text-decoration: underline;
  font-weight: 600;
}

.announcement-bar a:hover {
  color: var(--orange);
}

/* Official Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #FFFFFF;
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  gap: 20px;
}

/* Logo */
.brand-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
  display: block;
}

/* Navigation & Mega Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 100%;
}

.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

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

.nav-link svg.chevron {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.nav-item:hover .nav-link svg.chevron {
  transform: rotate(180deg);
}

/* Mega Dropdown Menu */
.mega-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  padding: 24px;
  min-width: 680px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  pointer-events: none;
  z-index: 1010;
}

.nav-item:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.mega-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.mega-grid-3 {
  grid-template-columns: repeat(3, 1fr);
  min-width: 820px;
}

.mega-column h4 {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 6px;
}

.mega-link-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  margin-bottom: 4px;
}

.mega-link-item:hover {
  background-color: var(--bg-subtle);
  transform: translateX(4px);
}

.mega-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mega-link-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--secondary);
  display: block;
  line-height: 1.3;
}

.mega-link-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 2px;
  display: block;
}

/* Callout inside Mega Menu */
.mega-callout {
  background: linear-gradient(135deg, #FFF1F2 0%, #FFE4E6 100%);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(227, 24, 55, 0.15);
}

.mega-callout h5 {
  color: var(--primary-dark);
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.mega-callout p {
  font-size: 0.84rem;
  color: var(--secondary-muted);
  margin-bottom: 10px;
  line-height: 1.4;
}

/* Header Action Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

/* Primary Booking Button */
.btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-red);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -3px rgba(227, 24, 55, 0.45);
}

/* Top Right Full Mock Test Button */
.btn-mock-test {
  background-color: #FFFFFF;
  color: var(--secondary);
  border: 2px solid #0F172A;
  position: relative;
  overflow: visible !important;
  display: inline-flex;
  align-items: center;
  margin-top: 4px;
}

.btn-mock-test::after {
  content: "FREE / LIVE";
  position: absolute;
  top: -10px;
  right: 10px;
  background: linear-gradient(135deg, var(--orange) 0%, #EA580C 100%);
  color: #FFFFFF;
  font-size: 0.62rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 2px 6px rgba(244, 130, 33, 0.45);
  border: 1.5px solid #FFFFFF;
  z-index: 10;
  white-space: nowrap;
  line-height: 1.2;
  pointer-events: none;
}

.btn-mock-test:hover {
  background-color: var(--secondary);
  color: #FFFFFF;
  border-color: var(--secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-mock-test:hover::after {
  background: linear-gradient(135deg, var(--primary) 0%, #C0132B 100%);
  box-shadow: 0 2px 6px rgba(227, 24, 55, 0.5);
}

/* IDP Official Orange Button */
.btn-orange {
  background-color: var(--orange);
  color: #FFFFFF;
  box-shadow: var(--shadow-orange);
}

.btn-orange:hover {
  background-color: var(--orange-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -3px rgba(244, 130, 33, 0.5);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: #FFFFFF;
}

.btn-dark {
  background-color: var(--secondary);
  color: #FFFFFF;
}

.btn-dark:hover {
  background-color: var(--secondary-light);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

/* Mobile Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--secondary);
  cursor: pointer;
  padding: 8px;
}

/* Hero Section */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 60%, #090E17 100%);
  color: #FFFFFF;
  padding: 70px 0 90px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -5%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(227, 24, 55, 0.25) 0%, rgba(227, 24, 55, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-content h1 .text-highlight {
  color: #FF4D6D;
  background: linear-gradient(90deg, #FF4D6D 0%, #F48221 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.6;
  color: #CBD5E1;
  margin-bottom: 30px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: #E2E8F0;
}

.trust-item svg {
  color: #10B981;
  flex-shrink: 0;
}

/* Hero Interactive Card / Quick Test Finder */
.hero-card {
  background: #FFFFFF;
  color: var(--text-main);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 8px;
}

.hero-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.finder-tabs {
  display: flex;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  padding: 4px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.finder-tab {
  flex: 1;
  text-align: center;
  padding: 8px 12px;
  font-size: 0.86rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-muted);
  transition: var(--transition);
}

.finder-tab.active {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.finder-form-group {
  margin-bottom: 16px;
}

.finder-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 6px;
}

.finder-select, .finder-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background-color: var(--bg-subtle);
  transition: var(--transition);
}

.finder-select:focus, .finder-input:focus {
  outline: none;
  border-color: var(--primary);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(227, 24, 55, 0.15);
}

/* Alliance Banner Section */
.alliance-banner-section {
  background: linear-gradient(90deg, #FFF1F2 0%, #FFFFFF 50%, #EFF6FF 100%);
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}

.alliance-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.alliance-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--orange) 100%);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 10px rgba(244, 130, 33, 0.25);
}

.alliance-cards {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.alliance-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.alliance-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -2px rgba(244, 130, 33, 0.2);
  border-color: var(--orange);
}

.alliance-info h5 {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 2px;
}

.alliance-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.alliance-link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.alliance-link:hover {
  color: var(--orange-dark);
}

/* Section Header Component */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: linear-gradient(90deg, #FFF1F2 0%, #FFF7ED 100%);
  border: 1px solid rgba(244, 130, 33, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--secondary);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Feature Grid */
.feature-section {
  padding: 80px 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 12px;
}

.card-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-footer {
  margin-top: auto;
}

/* Band Score Interactive Calculator */
.calc-container {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-xl);
  padding: 40px;
  margin-top: 30px;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
}

.calc-skill {
  margin-bottom: 24px;
}

.calc-skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.calc-skill-title {
  font-weight: 700;
  color: var(--secondary);
  font-size: 1rem;
}

.calc-skill-val {
  font-weight: 800;
  color: var(--primary);
  font-size: 1.15rem;
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.calc-slider {
  width: 100%;
  -webkit-appearance: none;
  height: 8px;
  border-radius: 4px;
  background: var(--border);
  outline: none;
  transition: opacity 0.2s;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(227, 24, 55, 0.4);
  transition: transform 0.1s ease;
}

.calc-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.calc-result-box {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.calc-score-display {
  font-size: 5rem;
  font-weight: 900;
  line-height: 1;
  color: #FF4D6D;
  margin: 16px 0;
  text-shadow: 0 4px 12px rgba(227, 24, 55, 0.4);
}

.calc-cefr-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 20px;
}

/* Comparison Tables (Competitor & Mock Test Battle) */
.comparison-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  margin-top: 32px;
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  background: #FFFFFF;
  text-align: left;
  font-size: 0.95rem;
}

.comp-table th, .comp-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.comp-table th {
  background-color: var(--bg-subtle);
  font-weight: 800;
  color: var(--secondary);
}

.comp-table th.highlight-col, .comp-table td.highlight-col {
  background-color: #FFF1F2;
  border-left: 2px solid var(--primary);
  border-right: 2px solid var(--primary);
}

.comp-table th.highlight-col {
  color: var(--primary);
}

.badge-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #059669;
  font-weight: 700;
}

.badge-cross {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #DC2626;
  font-weight: 600;
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  background: #FFFFFF;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--secondary);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
  padding: 0 24px 20px;
}

.faq-answer p {
  color: var(--text-muted);
  line-height: 1.6;
}

/* Strategic Breadcrumbs */
.breadcrumb-nav {
  background: var(--bg-subtle);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb-item a {
  color: var(--text-muted);
}

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

.breadcrumb-separator {
  color: var(--text-light);
}

.breadcrumb-item.active {
  color: var(--secondary);
  font-weight: 600;
}

/* Footer Architecture */
.site-footer {
  background: #090E17;
  color: #94A3B8;
  font-size: 0.92rem;
  padding: 70px 0 30px;
  border-top: 4px solid var(--primary);
  border-image: linear-gradient(90deg, var(--primary) 0%, var(--orange) 50%, var(--primary) 100%) 1;
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94A3B8;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

.footer-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #FFFFFF;
  font-weight: 700;
  margin-left: 6px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: #CBD5E1;
  text-decoration: underline;
}

/* Floating Conversion Bar for Mobile */
.mobile-conversion-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #FFFFFF;
  padding: 10px 16px;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.12);
  border-top: 1px solid var(--border);
  z-index: 999;
}

.mobile-conversion-bar .btn-group {
  display: flex;
  gap: 10px;
  width: 100%;
}

.mobile-conversion-bar .btn {
  flex: 1;
  padding: 12px 10px;
  font-size: 0.88rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-menu {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  .site-header .container {
    height: 70px;
  }
  .hero-content h1 {
    font-size: 2.2rem;
  }
  .grid-3, .grid-2, .grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .header-actions .btn-mock-test {
    display: none;
  }
  .mobile-conversion-bar {
    display: block;
  }
  body {
    padding-bottom: 60px;
  }
}