@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --color-bg-primary: #F5F7FA;
  --color-bg-secondary: #FFFFFF;
  --color-accent: #2C6E9E;
  --color-text-primary: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-light: #a0aec0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --border-radius: 0.5rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(44, 110, 158, 0.1);
  transition: var(--transition);
}

.nav-link {
  position: relative;
  padding-bottom: 0.25rem;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: translateX(-50%);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.hero-section {
  min-height: 100vh;
  background: linear-gradient(135deg, #e3f2fd 0%, #f5f7fa 50%, #e0e7ff 100%);
  background-size: 400% 400%;
  animation: gradientFlow 15s ease infinite;
  position: relative;
  overflow: hidden;
}

@keyframes gradientFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-image {
  opacity: 0;
  animation: fadeIn 1.2s ease-in-out forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.service-card {
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(44, 110, 158, 0.15);
}

.service-card img {
  transition: var(--transition);
}

.service-card:hover img {
  transform: scale(1.05);
}

.article-card {
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.article-card:hover {
  box-shadow: 0 8px 16px rgba(44, 110, 158, 0.12);
}

.read-more {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.read-more::after {
  content: '→';
  margin-left: 0.5rem;
  transition: var(--transition);
}

.read-more:hover::after {
  transform: translateX(4px);
}

.footer {
  border-top: 1px solid rgba(160, 174, 192, 0.2);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--color-text-light);
  font-weight: 300;
  font-size: 14px;
}

.signal-icon {
  width: 32px;
  height: 32px;
  position: relative;
}

.signal-icon::before,
.signal-icon::after {
  content: '';
  position: absolute;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  opacity: 0;
  animation: ripple 2s infinite;
}

.signal-icon::after {
  animation-delay: 1s;
}

@keyframes ripple {
  0% {
    width: 12px;
    height: 12px;
    top: 10px;
    left: 10px;
    opacity: 1;
  }
  100% {
    width: 32px;
    height: 32px;
    top: 0;
    left: 0;
    opacity: 0;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: var(--spacing-sm);
  }
  
  .hero-section {
    min-height: 80vh;
  }
  
  .service-card,
  .article-card {
    margin-bottom: var(--spacing-md);
  }
}

.smooth-scroll {
  scroll-behavior: smooth;
}

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

button:focus,
a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}