/* CSS Variables - Design System */
:root {
  --background: hsl(0, 0%, 100%);
  --foreground: hsl(210, 20%, 15%);
  --card: hsl(210, 20%, 98%);
  --card-foreground: hsl(210, 20%, 15%);
  --primary: hsl(165, 70%, 40%);
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: hsl(210, 15%, 96%);
  --secondary-foreground: hsl(210, 20%, 15%);
  --muted: hsl(210, 10%, 92%);
  --muted-foreground: hsl(210, 10%, 45%);
  --border: hsl(210, 15%, 88%);
  --radius: 0.5rem;
}

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

/* Base */
html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-sm {
  max-width: 896px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  background: none;
  color: var(--foreground);
}

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

.btn-primary:hover {
  opacity: 0.9;
}

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

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

.btn-ghost {
  background: none;
}

.btn-ghost:hover {
  background-color: var(--muted);
}

.btn-lg {
  padding: 0.75rem 3rem;
  font-size: 1rem;
}

/* Header */
.header {
  background-color: var(--background);
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--foreground);
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--foreground);
  cursor: pointer;
}

/* Mobile Menu */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 40;
}

.mobile-menu-overlay.active {
  display: block;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 16rem;
  height: 100%;
  background-color: var(--background);
  border-left: 1px solid var(--border);
  z-index: 50;
  transition: right 0.3s ease;
  padding: 1.5rem;
}

[dir="ltr"] .mobile-menu {
  right: auto;
  left: -100%;
  border-left: none;
  border-right: 1px solid var(--border);
}

.mobile-menu.active {
  right: 0;
}

[dir="ltr"] .mobile-menu.active {
  right: auto;
  left: 0;
}

.mobile-menu-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--foreground);
  cursor: pointer;
}

[dir="ltr"] .mobile-menu-close {
  right: auto;
  left: 1rem;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 3rem;
}

/* Hero */
.hero {
  padding: 5rem 1.5rem;
  background-color: var(--background);
}

.hero-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
  max-width: 1024px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.2;
  color: var(--foreground);
}

.hero-subtitle {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
  color: var(--primary);
}

.hero-description {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  margin-bottom: 2rem;
}

.hero-card {
  background-color: var(--card);
  border-radius: 1rem;
  padding: 3rem;
  border: 1px solid var(--border);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--primary);
}

.hero-stat-label {
  color: var(--muted-foreground);
}

/* Features */
.features {
  background-color: var(--secondary);
  padding: 4rem 1.5rem;
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 896px;
  margin: 0 auto;
}

.feature-card {
  background-color: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: hsla(165, 70%, 45%, 0.5);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  flex-shrink: 0;
  background-color: hsla(165, 70%, 45%, 0.2);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--foreground);
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* Steps */
.steps {
  padding: 4rem 1.5rem;
  background-color: var(--background);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--foreground);
}

.section-subtitle {
  color: var(--muted-foreground);
  margin-bottom: 2.5rem;
}

.steps-grid {
  display: grid;
  gap: 1.5rem;
  max-width: 1024px;
  margin: 0 auto;
}

.step-card {
  background-color: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  border-left: 4px solid var(--primary);
}

[dir="ltr"] .step-card {
  border-left: none;
  border-right: 4px solid var(--primary);
}

.step-number {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--foreground);
}

/* Contact */
.contact {
  padding: 4rem 1.5rem;
  background-color: var(--background);
}

.contact-card {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--card);
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  margin-top: 1.5rem;
}

.contact-icon {
  color: var(--primary);
}

.contact-email {
  font-weight: 500;
  color: var(--foreground);
  transition: color 0.2s;
}

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

/* Footer */
.footer {
  background-color: var(--secondary);
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  transition: color 0.2s;
}

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

/* Responsive */
@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }

  .hamburger {
    display: none;
  }

  .header-right {
    gap: 1.5rem;
  }

  .hero-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-title {
    font-size: 3rem;
  }

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

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