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

:root {
  --color-primary: #1a1a1a;
  --color-secondary: #2d2d2d;
  --color-accent: #0a66c2;
  --color-text: #1a1a1a;
  --color-text-light: #666666;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-border: #e5e5e5;

  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  font-weight: 400;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-width: 320px;
}

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

h1 {
  font-size: 3.5rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: 24px;
}

h2 {
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: 16px;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: 8px;
}

p {
  line-height: 1.8;
  color: var(--color-text-light);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  padding: 16px 0;
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--color-accent);
}

.hero {
  padding: 160px 0 120px;
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

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

.hero-text {
  max-width: 600px;
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  object-fit: cover;
  aspect-ratio: 4/5;
}

.expertise {
  padding: 120px 0;
  background-color: var(--color-bg);
}

.activities {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  margin-top: 64px;
}

.activity-card {
  background-color: var(--color-bg-alt);
  padding: 48px;
  border-radius: 16px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-border);
}

.activity-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.activity-type {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.activity-card p:not(.activity-type) {
  margin-top: 16px;
  font-size: 1rem;
  margin-bottom: 24px;
}

.btn-cta {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--color-accent);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color 0.3s ease, transform 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-cta:hover {
  background-color: #054f99;
  transform: translateY(-2px);
}

.clients {
  padding: 120px 0;
  background-color: var(--color-bg-alt);
}


.clients-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 64px;
  align-items: center;
}

.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background-color: var(--color-bg);
  border-radius: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-border);
  min-height: 140px;
}

.client-logo:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.client-logo img {
  max-width: 160px;
  max-height: 80px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: filter 0.3s ease, opacity 0.3s ease;
}

.client-logo:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

.contact {
  padding: 120px 0;
  background-color: var(--color-bg);
}

.contact-intro {
  text-align: center;
  font-size: 1.125rem;
  margin-bottom: 64px;
  color: var(--color-text);
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
}

.social-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 32px;
  background-color: var(--color-bg-alt);
  border-radius: 16px;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-border);
}

.social-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.social-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: transform 0.3s ease;
}

.social-card:hover .social-icon {
  transform: scale(1.1);
}

.social-icon svg {
  width: 32px;
  height: 32px;
}

.social-icon.linkedin {
  background-color: #0a66c2;
  color: white;
}

.social-icon.youtube {
  background-color: #ff0000;
  color: white;
}

.social-icon.twitter {
  background-color: #000000;
  color: white;
}

.social-card h3 {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.social-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.footer {
  padding: 48px 0;
  background-color: var(--color-primary);
  color: white;
  text-align: center;
}

.footer p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

@media (max-width: 968px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-image {
    order: -1;
  }

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

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .social-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .nav-links {
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero {
    padding: 120px 0 80px;
  }

  .expertise,
  .clients,
  .contact {
    padding: 80px 0;
  }

  .activity-card {
    padding: 32px;
  }

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

  .nav-links {
    display: none;
  }
}