:root {
  --fs-ink-9: #0f172a;
  --fs-mist-1: #f8fafc;
  --fs-rose-5: #e11d48;
  --fs-saffron-4: #f59e0b;
  --fs-azure-5: #2563eb;
  --fs-glass-bg: rgba(255,255,255,0.62);
  --fs-glass-brd: rgba(15,23,42,0.12);
  --fs-shadow-1: 0 18px 50px rgba(15,23,42,0.16);
  --fs-radius-1: 18px;
  --fs-transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --fs-font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

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

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

@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(--fs-font-base);
  line-height: 1.7;
  color: var(--fs-ink-9);
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.fs-home {
  background: linear-gradient(135deg, #fef3c7 0%, #dbeafe 100%);
}

body.fs-faq {
  background: linear-gradient(135deg, #fce7f3 0%, #e0e7ff 100%);
}

body.fs-about {
  background: linear-gradient(135deg, #f0fdf4 0%, #dbeafe 100%);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 10px;
  background: var(--fs-azure-5);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--fs-radius-1);
  text-decoration: none;
  font-weight: 600;
  z-index: 9999;
  transition: top var(--fs-transition-smooth);
}

.skip-link:focus {
  top: 10px;
  outline: 3px solid var(--fs-saffron-4);
  outline-offset: 4px;
}

.site-header {
  background: var(--fs-glass-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--fs-glass-brd);
  box-shadow: var(--fs-shadow-1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.site-branding .site-name {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--fs-rose-5);
  letter-spacing: -0.02em;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  color: var(--fs-ink-9);
  font-weight: 500;
  font-size: 1.05rem;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  transition: all var(--fs-transition-smooth);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--fs-azure-5);
  transition: all var(--fs-transition-smooth);
  transform: translateX(-50%);
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  width: 80%;
}

.main-nav a:hover {
  color: var(--fs-azure-5);
  background: rgba(37, 99, 235, 0.08);
}

.main-nav a:focus-visible {
  outline: 3px solid var(--fs-saffron-4);
  outline-offset: 4px;
}

.main-nav a[aria-current="page"] {
  color: var(--fs-rose-5);
  background: rgba(225, 29, 72, 0.1);
  font-weight: 600;
}

.breadcrumb-nav {
  max-width: 1400px;
  margin: 1.5rem auto 0;
  padding: 0 2rem;
}

.breadcrumb-list {
  list-style: none;
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.breadcrumb-list li:not(:last-child)::after {
  content: '/';
  color: var(--fs-ink-9);
  opacity: 0.4;
}

.breadcrumb-list a {
  color: var(--fs-azure-5);
  text-decoration: none;
  transition: color var(--fs-transition-smooth);
}

.breadcrumb-list a:hover {
  color: var(--fs-rose-5);
  text-decoration: underline;
}

.breadcrumb-list a:focus-visible {
  outline: 2px solid var(--fs-saffron-4);
  outline-offset: 3px;
  border-radius: 4px;
}

.main-content {
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 3rem 2rem;
  width: 100%;
}

.hero-section {
  text-align: center;
  margin-bottom: 4rem;
  padding: 2.5rem 1.5rem;
  background: var(--fs-glass-bg);
  backdrop-filter: blur(16px);
  border-radius: var(--fs-radius-1);
  box-shadow: var(--fs-shadow-1);
  border: 1px solid var(--fs-glass-brd);
}

.hero-section h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  color: var(--fs-ink-9);
  letter-spacing: -0.03em;
}

.hero-intro {
  font-size: 1.2rem;
  color: var(--fs-ink-9);
  opacity: 0.85;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

.content-section {
  margin-bottom: 3.5rem;
}

.section-card {
  background: var(--fs-glass-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--fs-radius-1);
  padding: 2.5rem;
  box-shadow: var(--fs-shadow-1);
  border: 1px solid var(--fs-glass-brd);
  transition: transform var(--fs-transition-smooth), box-shadow var(--fs-transition-smooth);
}

.section-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(15,23,42,0.2);
}

.section-card h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--fs-rose-5);
  letter-spacing: -0.02em;
}

.section-card p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.75;
}

.section-card p:last-child {
  margin-bottom: 0;
}

.section-card strong {
  color: var(--fs-azure-5);
  font-weight: 600;
}

.section-card a {
  color: var(--fs-azure-5);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--fs-transition-smooth);
}

.section-card a:hover {
  color: var(--fs-rose-5);
}

.section-card a:focus-visible {
  outline: 3px solid var(--fs-saffron-4);
  outline-offset: 4px;
  border-radius: 4px;
}

.keyword-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.keyword-item {
  background: rgba(255, 255, 255, 0.5);
  padding: 1rem 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--fs-glass-brd);
  font-size: 0.98rem;
  transition: all var(--fs-transition-smooth);
}

.keyword-item:hover {
  background: rgba(255, 255, 255, 0.8);
  transform: scale(1.03);
  box-shadow: 0 8px 20px rgba(15,23,42,0.12);
}

.reference-list {
  list-style: none;
  margin-top: 1.5rem;
}

.reference-list li {
  margin-bottom: 1rem;
  padding-left: 1.75rem;
  position: relative;
}

.reference-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--fs-rose-5);
  font-weight: 700;
  font-size: 1.2rem;
}

.table-wrapper {
  overflow-x: auto;
  margin-top: 1.5rem;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(15,23,42,0.15);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 14px;
  overflow: hidden;
}

table caption {
  font-size: 1.15rem;
  font-weight: 600;
  padding: 1.25rem;
  background: linear-gradient(135deg, var(--fs-rose-5), var(--fs-azure-5));
  color: white;
  text-align: left;
  letter-spacing: 0.01em;
}

table thead {
  background: linear-gradient(135deg, #1e293b, #334155);
  color: white;
}

table th {
  padding: 1.1rem 1.25rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

table tbody tr {
  border-bottom: 1px solid #e2e8f0;
  transition: background var(--fs-transition-smooth);
}

table tbody tr:nth-child(even) {
  background: #f8fafc;
}

table tbody tr:hover {
  background: #fef3c7;
}

table td {
  padding: 1.1rem 1.25rem;
  font-size: 0.98rem;
  line-height: 1.6;
}

.faq-accordion {
  margin-top: 1.5rem;
}

.faq-item {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--fs-glass-brd);
  border-radius: 14px;
  margin-bottom: 1.25rem;
  overflow: hidden;
  transition: all var(--fs-transition-smooth);
}

.faq-item:hover {
  box-shadow: 0 12px 35px rgba(15,23,42,0.18);
}

.faq-item summary {
  padding: 1.5rem 1.75rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--fs-azure-5);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--fs-transition-smooth);
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--fs-rose-5);
  transition: transform var(--fs-transition-smooth);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: rgba(37, 99, 235, 0.08);
}

.faq-item summary:focus-visible {
  outline: 3px solid var(--fs-saffron-4);
  outline-offset: -3px;
}

.faq-answer {
  padding: 0 1.75rem 1.75rem;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--fs-ink-9);
}

.faq-answer p {
  margin-bottom: 1rem;
}

.faq-answer a {
  color: var(--fs-azure-5);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--fs-transition-smooth);
}

.faq-answer a:hover {
  color: var(--fs-rose-5);
}

.faq-answer a:focus-visible {
  outline: 2px solid var(--fs-saffron-4);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-footer {
  background: linear-gradient(135deg, #1e293b, #334155);
  color: white;
  margin-top: auto;
  padding: 3rem 2rem 2rem;
  border-top: 3px solid var(--fs-rose-5);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.footer-brand .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fs-saffron-4);
  display: block;
  margin-bottom: 0.75rem;
}

.footer-disclaimer {
  font-size: 0.92rem;
  line-height: 1.6;
  opacity: 0.85;
  margin-top: 0.5rem;
}

.footer-nav ul {
  list-style: none;
}

.footer-nav li {
  margin-bottom: 0.75rem;
}

.footer-nav a {
  color: white;
  text-decoration: none;
  font-size: 1rem;
  transition: color var(--fs-transition-smooth);
  display: inline-block;
}

.footer-nav a:hover {
  color: var(--fs-saffron-4);
  transform: translateX(4px);
}

.footer-nav a:focus-visible {
  outline: 2px solid var(--fs-saffron-4);
  outline-offset: 4px;
  border-radius: 4px;
}

.footer-legal {
  text-align: right;
  font-size: 0.95rem;
  opacity: 0.9;
}

@media (max-width: 900px) {
  .header-container {
    flex-direction: column;
    gap: 1.25rem;
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .hero-section h1 {
    font-size: 2.2rem;
  }
  
  .keyword-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-legal {
    text-align: left;
  }
}

@media (max-width: 600px) {
  .main-content {
    padding: 2rem 1rem;
  }
  
  .section-card {
    padding: 1.75rem;
  }
  
  .hero-section h1 {
    font-size: 1.85rem;
  }
  
  .hero-intro {
    font-size: 1.05rem;
  }
  
  table th,
  table td {
    padding: 0.85rem;
    font-size: 0.9rem;
  }
}