:root {
  --primary: #6667ab;
  --primary-hover: #535494;
  --bg-light: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --accent: #0284c7;
  --border-color: #e2e8f0;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background-color: var(--bg-light);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: #ffffff;
}

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

.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--primary);
}

.hero {
  padding: 80px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 480px) {
  .logo {
    font-size: 19px;
  }

  .header-nav .btn {
    padding: 8px 14px;
    font-size: 13px;
    white-space: nowrap;
  }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 40px 0;
    text-align: center;
  }
}

h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

h1 span {
  color: var(--primary);
}

.hero-text {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  background-color: var(--primary);
  color: #fff;
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.1s ease;
  border: none;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 4px 6px -1px rgba(102, 103, 171, 0.2);
}

.btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.section-padding {
  padding: 80px 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: 50px 0;
  }
}

.section-title {
  text-align: center;
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 48px;
  letter-spacing: -0.5px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

@media (max-width: 768px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
  font-size: 15px;
}

.proof-banner {
  background-color: #f1f5f9;
  padding: 32px 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.proof-text {
  font-size: 18px;
  font-weight: 600;
  color: #334155;
}

.proof-text span {
  color: var(--primary);
}

.cta-section {
  background-color: #ffffff;
  border-radius: 24px;
  padding: 60px;
  border: 1px solid var(--border-color);
  max-width: 650px;
  margin: 0 auto;
  text-align: center;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.02);
}

@media (max-width: 768px) {
  .cta-section {
    padding: 40px 24px;
  }
}

.cta-section p {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 16px;
}

.main-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-card);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

.footer-copyright {
  margin: 0 0 6px 0;
  font-weight: 500;
  color: var(--text-main);
}

.footer-patent {
  margin: 0 0 10px 0;
  color: #94a3b8;
  font-size: 12px;
}

.footer-requisites {
  margin: 0 0 16px 0;
  font-size: 12px;
}

.footer-requisites span {
  white-space: nowrap;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
}

.footer-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px dashed var(--primary);
  transition: color 0.2s ease, border-color 0.2s ease;
}

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