:root {
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-active: #1d4ed8;
  --color-secondary: #0f172a;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition-base: all 0.2s ease-in-out;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 2.5rem;
  --max-width: 1200px;
  --container-padding: 1.5rem;
}

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

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.875rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p,
ul,
ol {
  margin-bottom: var(--spacing-md);
}

ul,
ol {
  padding-left: 1.5rem;
}

li {
  margin-bottom: var(--spacing-xs);
}

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

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

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

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

.section {
  padding: var(--spacing-2xl) 0;
}

.section--compact {
  padding: var(--spacing-xl) 0;
}

/* Header & Navigation */
.header {
  background-color: white;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-brand a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-secondary);
  text-decoration: none;
  display: inline-block;
}

.header-brand a span {
  color: var(--color-primary);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.nav-item a {
  font-weight: 600;
  color: var(--color-text);
  position: relative;
  padding: 0.5rem 0;
  display: inline-block;
}

.nav-item a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-item a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition-base);
}

.nav-item a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: 4rem 0;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-secondary);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.feature-tag {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  display: inline-block;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition-base);
  border: none;
  cursor: pointer;
  text-decoration: none;
  min-width: 160px;
}

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

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

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

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

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

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

/* Section Title & Description */
.section-title {
  font-size: 1.875rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-secondary);
}

.section-desc {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.card {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
}

.card-text {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* Audience Section */
.audience-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.audience-item {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
}

.audience-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
}

.audience-text {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* Timeline */
.timeline-steps {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.timeline-steps::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background-color: var(--color-border);
  transform: translateX(-50%);
}

.timeline-step {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding-left: var(--spacing-xl);
}

.timeline-step::before {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-primary);
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  border: 4px solid white;
}

.timeline-step:nth-child(odd) {
  padding-left: 0;
  padding-right: var(--spacing-xl);
  text-align: right;
}

.timeline-step:nth-child(odd)::before {
  left: auto;
  right: 0;
}

.step-number {
  display: inline-block;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  line-height: 32px;
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.step-content h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.step-content p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

/* Compliance Section */
.compliance-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.compliance-item {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-light);
}

.compliance-item:last-child {
  border-bottom: none;
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  position: relative;
}

.faq-question::after {
  content: "+";
  font-weight: bold;
  font-size: 1.25rem;
}

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

.faq-answer {
  color: var(--color-text-light);
  margin-top: var(--spacing-sm);
  padding-left: 1.25rem;
  border-left: 2px solid var(--color-border);
}

/* Contact Section */
.contact-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.contact-card {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  text-align: left;
}

.contact-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
}

.contact-text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

/* Footer */
.footer {
  background-color: var(--color-secondary);
  color: white;
  padding: var(--spacing-xl) 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-brand a {
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  text-decoration: none;
  display: inline-block;
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.75);
  margin-top: var(--spacing-xs);
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.875rem;
  transition: var(--transition-base);
}

.footer-links a:hover {
  color: white;
  text-decoration: underline;
}

.footer-copyright {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: var(--spacing-md);
}

/* Utilities */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.font-bold {
  font-weight: 700;
}

.mt-auto {
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    height: auto;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .timeline-steps::before {
    left: 20px;
  }

  .timeline-step {
    padding-left: 0;
    padding-right: 0;
    text-align: left;
  }

  .timeline-step::before {
    left: 0;
    transform: none;
  }

  .timeline-step:nth-child(odd) {
    text-align: left;
  }

  .timeline-step:nth-child(odd)::before {
    left: 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  .hero {
    padding: 2.5rem 0;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .feature-tag {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .btn {
    min-width: auto;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
}