/* 
 * Color Blind Test Website - Main Stylesheet
 * A clean, accessible, EEAT-compliant design
 */

/* CSS Variables - Distinctive Color Palette */
:root {
  /* Primary Colors - Deep teal with warm accents */
  --primary: #0d7377;
  --primary-dark: #065a5c;
  --primary-light: #14a3a8;
  
  /* Accent Colors */
  --accent: #e8a838;
  --accent-dark: #d4922a;
  --accent-light: #f5c15d;
  
  /* Neutrals - Warm grays */
  --bg-primary: #fafbfc;
  --bg-secondary: #f0f4f5;
  --bg-card: #ffffff;
  --text-primary: #1a2e35;
  --text-secondary: #4a5f68;
  --text-muted: #7a8f98;
  --border: #e2e8eb;
  --border-light: #f0f4f5;
  
  /* Semantic Colors */
  --success: #2d9a5d;
  --warning: #e8a838;
  --error: #d94f4f;
  --info: #3b82c4;
  
  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  
  /* 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;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 46, 53, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 46, 53, 0.08);
  --shadow-lg: 0 8px 24px rgba(26, 46, 53, 0.12);
  --shadow-xl: 0 16px 48px rgba(26, 46, 53, 0.16);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Container */
  --container-max: 1200px;
  --container-narrow: 800px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #0f1419;
  --bg-secondary: #1a2028;
  --bg-card: #1e2530;
  --text-primary: #e8edf2;
  --text-secondary: #a8b5c4;
  --text-muted: #6b7a8a;
  --border: #2d3a47;
  --border-light: #252f3a;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .header {
  background: var(--bg-card);
  border-bottom-color: var(--border);
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

[data-theme="dark"] .hero::before {
  background: radial-gradient(ellipse, rgba(20, 163, 168, 0.1) 0%, transparent 70%);
}

[data-theme="dark"] .section--alt {
  background: var(--bg-secondary);
}

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

[data-theme="dark"] .footer {
  background: linear-gradient(135deg, #0a0f14 0%, #060a0d 100%);
}

[data-theme="dark"] .disclaimer-box {
  background: linear-gradient(135deg, rgba(232, 168, 56, 0.15), rgba(232, 168, 56, 0.08));
  border-color: rgba(232, 168, 56, 0.4);
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-textarea {
  background: var(--bg-secondary);
  border-color: var(--border);
  color: var(--text-primary);
}

[data-theme="dark"] .test-option {
  background: var(--bg-secondary);
  border-color: var(--border);
  color: var(--text-primary);
}

[data-theme="dark"] .test-option:hover {
  background: rgba(20, 163, 168, 0.1);
}

[data-theme="dark"] .blog-card__image {
  background: linear-gradient(135deg, var(--bg-secondary), var(--border));
}

[data-theme="dark"] .table th {
  background: var(--bg-secondary);
}

[data-theme="dark"] .references {
  background: var(--bg-secondary);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  color: var(--text-primary);
  margin-right: var(--space-md);
}

.theme-toggle:hover {
  border-color: var(--primary);
  background: rgba(13, 115, 119, 0.1);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

.theme-toggle .icon-sun {
  display: block;
}

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

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

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

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

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

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

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

/* Header & Navigation */
.header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  max-width: var(--container-max);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo__icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__list {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav__link {
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-sm) 0;
  position: relative;
}

.nav__link:hover,
.nav__link--active {
  color: var(--primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-normal);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__cta {
  background: var(--primary);
  color: white !important;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.nav__cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Mobile Menu */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(13, 115, 119, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(13, 115, 119, 0.1);
  color: var(--primary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  margin-bottom: var(--space-lg);
  line-height: 1.15;
}

.hero__title span {
  color: var(--primary);
}

.hero__description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.hero__cta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__plates {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  transform: rotate(-5deg);
}

.hero__plate {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  animation: float 6s ease-in-out infinite;
}

.hero__plate:nth-child(2) { animation-delay: -1.5s; }
.hero__plate:nth-child(3) { animation-delay: -3s; }
.hero__plate:nth-child(4) { animation-delay: -4.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn--primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: white;
}

.btn--secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 2px solid var(--border);
}

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

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

.btn--accent:hover {
  background: var(--accent-dark);
}

.btn--large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.125rem;
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background: var(--bg-secondary);
}

.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
}

.section__subtitle {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section__title {
  margin-bottom: var(--space-md);
}

.section__description {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

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

.card__icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(13, 115, 119, 0.1), rgba(13, 115, 119, 0.05));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}

.card__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* Test Interface */
.test-container {
  max-width: 800px;
  margin: 0 auto;
}

.test-progress {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.test-progress__bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.test-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.test-progress__text {
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 80px;
  text-align: right;
}

.test-plate {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-2xl);
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.test-plate__image {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-md);
  background: var(--border);
}

.test-plate__question {
  font-size: 1.25rem;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.test-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  width: 100%;
  max-width: 400px;
}

.test-option {
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.test-option:hover {
  border-color: var(--primary);
  background: rgba(13, 115, 119, 0.05);
}

.test-option--selected {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.test-nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xl);
}

/* Results Display */
.results {
  text-align: center;
  padding: var(--space-2xl);
}

.results__score {
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-md);
}

.results__label {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.results__breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.results__item {
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.results__item-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.results__item-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Trust Signals */
.trust-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: var(--space-2xl) 0;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.trust-badge__icon {
  color: var(--success);
  font-size: 1.25rem;
}

/* Author Card */
.author-card {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.author-card__image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-secondary);
}

.author-card__content {
  flex: 1;
}

.author-card__name {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.author-card__title {
  color: var(--primary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.author-card__bio {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.author-card__credentials {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.credential {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* FAQ */
.faq {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--border);
}

.faq__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: left;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

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

.faq__icon {
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform var(--transition-fast);
}

.faq__item--open .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  padding: 0 0 var(--space-lg);
  color: var(--text-secondary);
  display: none;
}

.faq__item--open .faq__answer {
  display: block;
}

/* Medical Disclaimer */
.disclaimer-box {
  background: linear-gradient(135deg, rgba(232, 168, 56, 0.1), rgba(232, 168, 56, 0.05));
  border: 1px solid rgba(232, 168, 56, 0.3);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.disclaimer-box__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-dark);
  margin-bottom: var(--space-sm);
}

.disclaimer-box__text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Blog Cards */
.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

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

.blog-card__image {
  height: 200px;
  background: linear-gradient(135deg, var(--bg-secondary), var(--border));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.blog-card__content {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.blog-card__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.blog-card__excerpt {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  flex: 1;
}

.blog-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Footer */
.footer {
  background: linear-gradient(135deg, #1a2e35 0%, #0d1f24 100%);
  color: #b8c5ca;
  padding: var(--space-3xl) 0 var(--space-xl);
}

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

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-md);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.footer__description {
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  color: #a0b5bc;
}

.footer__title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: var(--space-sm);
}

.footer__links a {
  color: #a0b5bc;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: #14a3a8;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.875rem;
  color: #8a9da5;
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.footer__social a:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--bg-card);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.table th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}

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

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

/* Content Styles */
.content {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.content h2 {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.content ul, .content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.content li {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.content blockquote {
  border-left: 4px solid var(--primary);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

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

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

.breadcrumbs__separator {
  color: var(--border);
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.stat {
  text-align: center;
  padding: var(--space-xl);
}

.stat__value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-display);
}

.stat__label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}

/* References */
.references {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
}

.references__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.references__list {
  list-style: none;
  padding: 0;
}

.references__list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  padding-left: var(--space-lg);
  position: relative;
}

.references__list li::before {
  content: attr(data-ref);
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 600;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__description {
    max-width: none;
    margin: 0 auto var(--space-xl);
  }
  
  .hero__cta {
    justify-content: center;
  }
  
  .hero__visual {
    order: -1;
    margin-bottom: var(--space-xl);
  }
  
  .hero__plates {
    transform: rotate(0);
  }
  
  .grid--3, .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav__list {
    display: none;
  }
  
  .nav__toggle {
    display: block;
  }
  
  .nav--open .nav__list {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border);
  }
  
  .grid--2, .grid--3, .grid--4 {
    grid-template-columns: 1fr;
  }
  
  .test-options {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .results__breakdown {
    grid-template-columns: 1fr;
  }
  
  .author-card {
    flex-direction: column;
    text-align: center;
  }
  
  .author-card__credentials {
    justify-content: center;
  }
  
  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer__brand {
    max-width: none;
  }
  
  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .stats {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  .header, .footer, .nav, .btn {
    display: none;
  }
  
  body {
    font-size: 12pt;
    color: black;
    background: white;
  }
  
  .container {
    max-width: none;
    padding: 0;
  }
}

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

/* Focus Styles */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--primary);
  color: white;
  border-radius: var(--radius-md);
  z-index: 9999;
}

.skip-link:focus {
  top: var(--space-md);
}