:root {
  --bg-aurora: #0b1220;
  --surface-glass-dark: rgba(255, 255, 255, 0.08);
  --surface-glass-light: rgba(255, 255, 255, 0.14);
  --text-ink: #eaf0ff;
  --text-muted: rgba(234, 240, 255, 0.72);
  --accent-lake: #5eead4;
  --accent-ember: #fb7185;
  --stroke-hairline: rgba(255, 255, 255, 0.18);
  --shadow-depth: 0 18px 60px rgba(0, 0, 0, 0.45);
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

body {
  font-family: var(--font-base);
  background: linear-gradient(165deg, #0b1220 0%, #1a1f35 48%, #0f1829 100%);
  background-attachment: fixed;
  color: var(--text-ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  background: var(--surface-glass-dark);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--stroke-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.site-branding {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-lake) 0%, var(--accent-ember) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 12px rgba(94, 234, 212, 0.3);
}

.primary-nav {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  font-size: 0.95rem;
}

.nav-link:hover {
  color: var(--accent-lake);
  background: rgba(94, 234, 212, 0.1);
  transform: translateY(-1px);
}

.nav-link.active {
  color: var(--accent-lake);
  background: rgba(94, 234, 212, 0.15);
}

.nav-link:focus-visible {
  outline: 2px solid var(--accent-lake);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.breadcrumbs {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: var(--accent-lake);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover {
  color: var(--accent-ember);
  text-decoration: underline;
}

.breadcrumbs a:focus-visible {
  outline: 2px solid var(--accent-lake);
  outline-offset: 2px;
  border-radius: 2px;
}

.breadcrumb-separator {
  color: var(--stroke-hairline);
  user-select: none;
}

.breadcrumb-current {
  color: var(--text-ink);
  font-weight: 500;
}

.main-content {
  flex: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  width: 100%;
}

.hero-section {
  background: var(--surface-glass-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--stroke-hairline);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-depth);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(94, 234, 212, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(120deg, var(--text-ink) 0%, var(--accent-lake) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-ink);
  letter-spacing: -0.02em;
  position: relative;
  padding-bottom: var(--spacing-sm);
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-lake) 0%, transparent 100%);
  border-radius: 2px;
}

h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
  color: var(--accent-lake);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-muted);
  font-size: 1.0625rem;
}

.hero-subcopy {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 900px;
}

.content-section {
  background: var(--surface-glass-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--stroke-hairline);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-section:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
}

.intro-section {
  background: linear-gradient(145deg, var(--surface-glass-light) 0%, var(--surface-glass-dark) 100%);
  border: 1px solid var(--stroke-hairline);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

a {
  color: var(--accent-lake);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--accent-ember);
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 2px solid var(--accent-lake);
  outline-offset: 3px;
  border-radius: 3px;
}

ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--text-muted);
  line-height: 1.7;
}

li::marker {
  color: var(--accent-lake);
}

strong {
  color: var(--text-ink);
  font-weight: 600;
}

.table-section {
  background: linear-gradient(135deg, rgba(94, 234, 212, 0.05) 0%, rgba(251, 113, 133, 0.05) 100%);
  border: 1px solid rgba(94, 234, 212, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: 0 6px 28px rgba(94, 234, 212, 0.15);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background: var(--surface-glass-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

thead {
  background: linear-gradient(135deg, rgba(94, 234, 212, 0.2) 0%, rgba(94, 234, 212, 0.1) 100%);
}

th {
  padding: var(--spacing-md) var(--spacing-md);
  text-align: left;
  font-weight: 600;
  color: var(--accent-lake);
  border-bottom: 2px solid var(--stroke-hairline);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

td {
  padding: var(--spacing-md) var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

tbody tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background: rgba(94, 234, 212, 0.08);
}

tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

tbody tr:nth-child(even):hover {
  background: rgba(94, 234, 212, 0.08);
}

.info-table th {
  background: linear-gradient(120deg, rgba(251, 113, 133, 0.15) 0%, rgba(94, 234, 212, 0.15) 100%);
  color: var(--text-ink);
}

.verification-table {
  border: 2px solid rgba(251, 113, 133, 0.3);
}

.verification-table th {
  background: linear-gradient(90deg, rgba(251, 113, 133, 0.2) 0%, rgba(251, 113, 133, 0.1) 100%);
  color: var(--accent-ember);
  border-bottom: 2px solid rgba(251, 113, 133, 0.4);
}

.standards-table {
  border: 2px solid rgba(94, 234, 212, 0.25);
  box-shadow: 0 8px 32px rgba(94, 234, 212, 0.2);
}

.standards-table thead {
  background: linear-gradient(110deg, rgba(94, 234, 212, 0.25) 0%, rgba(94, 234, 212, 0.15) 100%);
}

.standards-table th {
  color: var(--accent-lake);
  font-size: 1rem;
  padding: var(--spacing-md) var(--spacing-md);
}

.faq-accordion {
  background: var(--surface-glass-dark);
  border: 1px solid var(--stroke-hairline);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.faq-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--stroke-hairline);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--accent-lake);
  box-shadow: 0 4px 16px rgba(94, 234, 212, 0.2);
}

.faq-item[open] {
  background: rgba(94, 234, 212, 0.06);
  border-color: var(--accent-lake);
}

summary {
  padding: var(--spacing-md) var(--spacing-md);
  font-weight: 600;
  color: var(--text-ink);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: color 0.2s ease;
  font-size: 1.0625rem;
}

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

summary::before {
  content: '+';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--accent-lake);
  color: var(--bg-aurora);
  border-radius: 50%;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.2s ease;
}

.faq-item[open] summary::before {
  content: '−';
  transform: rotate(180deg);
  background: var(--accent-ember);
}

summary:hover {
  color: var(--accent-lake);
}

summary:focus-visible {
  outline: 2px solid var(--accent-lake);
  outline-offset: 2px;
}

.faq-content {
  padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
  color: var(--text-muted);
  line-height: 1.7;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.faq-content p {
  margin-bottom: var(--spacing-md);
}

.faq-content ul {
  margin-top: var(--spacing-sm);
}

.cta-section {
  background: linear-gradient(135deg, rgba(94, 234, 212, 0.1) 0%, rgba(251, 113, 133, 0.1) 100%);
  border: 2px solid var(--accent-lake);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  margin: var(--spacing-xl) 0;
  box-shadow: 0 12px 48px rgba(94, 234, 212, 0.25);
}

.cta-section h2 {
  margin-bottom: var(--spacing-md);
}

.cta-section h2::after {
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
}

.cta-link {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--accent-lake);
  color: var(--bg-aurora);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin: var(--spacing-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(94, 234, 212, 0.3);
  font-size: 1.0625rem;
}

.cta-link:hover {
  background: var(--accent-ember);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(251, 113, 133, 0.4);
  text-decoration: none;
}

.cta-link:focus-visible {
  outline: 3px solid var(--text-ink);
  outline-offset: 4px;
}

.site-footer {
  background: var(--surface-glass-dark);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--stroke-hairline);
  margin-top: auto;
  padding: var(--spacing-lg) var(--spacing-lg);
  box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.25);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.footer-container p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin: 0;
}

.footer-nav {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
  padding: var(--spacing-xs);
}

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

.footer-nav a:focus-visible {
  outline: 2px solid var(--accent-lake);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-md);
  }

  .primary-nav {
    width: 100%;
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .nav-link {
    width: 100%;
    text-align: left;
  }

  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .hero-section {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  table {
    font-size: 0.875rem;
  }

  th, td {
    padding: var(--spacing-sm);
  }

  .cta-link {
    display: block;
    margin: var(--spacing-sm) 0;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .header-container {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .main-content {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.875rem;
  }
}

@media (min-width: 1025px) {
  .content-section:hover {
    transform: translateY(-4px);
  }

  .faq-item:hover {
    transform: translateX(4px);
  }
}

@media (prefers-color-scheme: light) {
  body {
    background: linear-gradient(165deg, #f0f4f8 0%, #d9e2ec 48%, #e4ebf1 100%);
  }
}