:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --success: #10b981;
  --text-dark: #1f2937;
  --text-gray: #6b7280;
  --text-light: #9ca3af;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --spacing: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-white);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing) * 2);
}

header {
  background: var(--bg-white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: calc(var(--spacing) * 2) 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: calc(var(--spacing) * 2);
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

nav {
  display: flex;
  gap: calc(var(--spacing) * 3);
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-gray);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.lang-switcher {
  display: flex;
  gap: calc(var(--spacing) * 1.5);
  flex-wrap: wrap;
  font-size: 14px;
}

.lang-switcher a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
}

.lang-switcher a:hover,
.lang-switcher a.active {
  color: var(--primary);
}

.hero {
  padding: calc(var(--spacing) * 10) 0;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--spacing) * 6);
  align-items: center;
}

.hero-content h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: calc(var(--spacing) * 3);
  color: var(--text-dark);
}

.hero-content .benefits {
  list-style: none;
  margin: calc(var(--spacing) * 4) 0;
}

.hero-content .benefits li {
  padding: calc(var(--spacing) * 1.5) 0;
  padding-left: calc(var(--spacing) * 4);
  position: relative;
  font-size: 18px;
  color: var(--text-gray);
}

.hero-content .benefits li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
  font-size: 24px;
}

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

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: calc(var(--spacing) * 2);
  box-shadow: var(--shadow-lg);
}

.btn {
  display: inline-block;
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 4);
  background: var(--primary);
  color: var(--bg-white);
  text-decoration: none;
  border-radius: calc(var(--spacing) * 1);
  font-weight: 600;
  font-size: 18px;
  transition: all 0.3s;
  box-shadow: var(--shadow);
  text-align: center;
}

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

.btn-large {
  padding: calc(var(--spacing) * 2.5) calc(var(--spacing) * 6);
  font-size: 20px;
}

section {
  padding: calc(var(--spacing) * 10) 0;
}

section:nth-child(even) {
  background: var(--bg-light);
}

.section-title {
  text-align: center;
  font-size: 40px;
  font-weight: 700;
  margin-bottom: calc(var(--spacing) * 6);
  color: var(--text-dark);
}

.section-subtitle {
  text-align: center;
  font-size: 18px;
  color: var(--text-gray);
  max-width: 700px;
  margin: 0 auto calc(var(--spacing) * 6);
  line-height: 1.8;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--spacing) * 3);
  margin-top: calc(var(--spacing) * 4);
}

.card {
  background: var(--bg-white);
  padding: calc(var(--spacing) * 4);
  border-radius: calc(var(--spacing) * 2);
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: calc(var(--spacing) * 2);
  color: var(--text-dark);
}

.card p {
  color: var(--text-gray);
  line-height: 1.8;
}

.icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: calc(var(--spacing) * 2);
  font-size: 24px;
  color: var(--bg-white);
}

.price-box {
  background: var(--bg-white);
  border: 2px solid var(--primary);
  border-radius: calc(var(--spacing) * 2);
  padding: calc(var(--spacing) * 5);
  max-width: 600px;
  margin: calc(var(--spacing) * 6) auto;
  text-align: center;
}

.price-box .price {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
  margin: calc(var(--spacing) * 2) 0;
}

.price-box p {
  color: var(--text-gray);
  margin: calc(var(--spacing) * 2) 0;
}

.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: calc(var(--spacing) * 3);
  margin-top: calc(var(--spacing) * 4);
}

.testimonial {
  background: var(--bg-white);
  padding: calc(var(--spacing) * 4);
  border-radius: calc(var(--spacing) * 2);
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.testimonial p {
  color: var(--text-gray);
  font-style: italic;
  margin-bottom: calc(var(--spacing) * 2);
  line-height: 1.8;
}

.testimonial .author {
  font-weight: 600;
  color: var(--text-dark);
  font-style: normal;
}

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

.faq-item {
  background: var(--bg-white);
  padding: calc(var(--spacing) * 3);
  border-radius: calc(var(--spacing) * 1.5);
  margin-bottom: calc(var(--spacing) * 2);
  box-shadow: var(--shadow);
}

.faq-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: calc(var(--spacing) * 1.5);
  color: var(--text-dark);
}

.faq-item p {
  color: var(--text-gray);
  line-height: 1.8;
}

.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--bg-white);
  text-align: center;
  padding: calc(var(--spacing) * 10) 0;
}

.cta-section h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: calc(var(--spacing) * 3);
}

.cta-section p {
  font-size: 20px;
  margin-bottom: calc(var(--spacing) * 4);
  opacity: 0.95;
}

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

.cta-section .btn:hover {
  background: var(--bg-light);
  transform: translateY(-2px);
}

footer {
  background: var(--text-dark);
  color: var(--bg-light);
  padding: calc(var(--spacing) * 6) 0;
  text-align: center;
}

footer p {
  margin: calc(var(--spacing) * 1) 0;
  color: var(--text-light);
}

footer a {
  color: var(--bg-light);
  text-decoration: none;
}

footer a:hover {
  color: var(--bg-white);
}

footer .lang-switcher {
  justify-content: center;
  margin-top: calc(var(--spacing) * 3);
}

.lang-selector {
  max-width: 800px;
  margin: calc(var(--spacing) * 10) auto;
  padding: calc(var(--spacing) * 6);
  background: var(--bg-white);
  border-radius: calc(var(--spacing) * 2);
  box-shadow: var(--shadow-lg);
}

.lang-selector h1 {
  text-align: center;
  font-size: 40px;
  margin-bottom: calc(var(--spacing) * 3);
  color: var(--text-dark);
}

.lang-selector p {
  text-align: center;
  color: var(--text-gray);
  font-size: 18px;
  margin-bottom: calc(var(--spacing) * 5);
}

.lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: calc(var(--spacing) * 2);
  margin-top: calc(var(--spacing) * 4);
}

.lang-grid a {
  padding: calc(var(--spacing) * 3);
  background: var(--bg-light);
  border-radius: calc(var(--spacing) * 1.5);
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 600;
  text-align: center;
  transition: all 0.3s;
  border: 2px solid transparent;
}

.lang-grid a:hover {
  background: var(--primary);
  color: var(--bg-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: calc(var(--spacing) * 4);
  }

  .hero-content h1 {
    font-size: 36px;
  }

  .section-title {
    font-size: 32px;
  }

  nav {
    flex-direction: column;
    align-items: flex-start;
  }

  header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .lang-switcher {
    font-size: 13px;
  }

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

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

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