:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --primary-accent: #64748b;
  --secondary: #f59e0b;
  --secondary-dark: #d97706;
  --accent: #10b981;
  --accent-dark: #059669;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-accent: #f1f5f9;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 2.5rem;
  --spacing-3xl: 3rem;
  --spacing-4xl: 4rem;
  --spacing-5xl: 5rem;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  font-size: 16px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-5xl) 0;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
  font-weight: 400;
  max-width: 600px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-align: center;
  transition: all 0.2s ease;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

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

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

.btn-outline:hover {
  background-color: var(--primary);
  color: white;
  transform: translateY(-2px);
}

header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: transform 0.2s ease;
}

.logo-container:hover {
  transform: scale(1.05);
}

.logo {
  width: 52px;
  height: 52px;
  filter: drop-shadow(var(--shadow-sm));
}

.brand-name {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary-accent) 100%);
  color: white;
  padding: var(--spacing-5xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
  letter-spacing: -0.03em;
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-size: 1.375rem;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.95;
  line-height: 1.6;
  font-weight: 400;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.feature-card {
  background: var(--bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-medium);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.feature-text {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1.063rem;
}

.content-section {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-accent) 100%);
}

.two-column {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-4xl);
  align-items: center;
}

.content-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.063rem;
  margin-bottom: var(--spacing-md);
}

.content-image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.content-text h2 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.mechanics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.mechanic-item {
  background: var(--bg-primary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.mechanic-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--secondary);
}

.mechanic-item h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.mechanic-item p {
  color: var(--text-secondary);
  font-size: 0.938rem;
  line-height: 1.6;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.product-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-medium);
}

.product-image {
  aspect-ratio: 16/10;
  position: relative;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-content {
  padding: var(--spacing-xl);
}

.product-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.product-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
  font-size: 0.938rem;
}

.product-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.tip-card {
  background: var(--bg-primary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
}

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

.tip-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  border-radius: var(--radius-lg);
  font-weight: 800;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-md);
}

.tip-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.tip-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.938rem;
}

.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary-accent) 100%);
  color: white;
  text-align: center;
  padding: var(--spacing-5xl) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
  pointer-events: none;
}

.cta-section .section-title {
  color: white;
  position: relative;
  z-index: 1;
}

.cta-section .section-subtitle {
  color: rgba(255, 255, 255, 0.9);
  position: relative;
  z-index: 1;
  margin-left: auto;
  margin-right: auto;
}

.contacts-section {
  background: var(--bg-secondary);
}

.contacts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.contact-card {
  background: var(--bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.contact-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-medium);
}

.contact-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.75rem;
  box-shadow: var(--shadow-lg);
}

.contact-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.contact-value {
  font-size: 1.125rem;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.5;
}

footer {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="footerPattern" width="50" height="50" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.05"/></pattern></defs><rect width="100" height="100" fill="url(%23footerPattern)"/></svg>');
  pointer-events: none;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  z-index: 1;
}

.footer-links {
  display: flex;
  flex-direction: column;
}

.footer-links a {
  margin-bottom: var(--spacing-sm);
}

.footer-section h3 {
  font-size: 1.375rem;
  margin-bottom: var(--spacing-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  display: block;
  font-size: 0.938rem;
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: white;
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--spacing-xl);
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  position: relative;
  z-index: 1;
}


@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

  .section-title {
    font-size: 2rem;
  }

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

  .btn {
    width: 100%;
    max-width: 320px;
  }

  .two-column {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .features-grid,
  .products-grid,
  .contacts-grid {
    grid-template-columns: 1fr;
  }

  .mechanics-grid,
  .tips-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .feature-card,
  .product-card,
  .contact-card {
    padding: var(--spacing-lg);
  }
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--primary);
  background-color: var(--bg-accent);
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.btn:focus,
a:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Loading animation for images */