:root {
  --primary-color: #1E3A8A;
  --secondary-color: #C0C0C0;
  --background-color: #F8FAFC;
  --footer-bg-color: #1E3A8A;
  --button-color: #1E3A8A;
  --section-bg-1: #FFFFFF;
  --section-bg-2: #F1F5F9;
  --section-bg-3: #E2E8F0;
  --font-primary: 'Roboto', sans-serif;
  --font-secondary: 'Open Sans', sans-serif;
  --transition-base: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
  font-family: var(--font-primary);
  background-color: var(--background-color);
  color: #334155;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 2.5rem;
  line-height: 1.2;
}

h2 {
  font-size: 2rem;
  line-height: 1.25;
}

p {
  margin-bottom: 1.5rem;
  color: #475569;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-base);
}

a:hover {
  color: #1D4ED8;
  text-decoration: underline;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-bg-1 {
  background-color: var(--section-bg-1);
}

.section-bg-2 {
  background-color: var(--section-bg-2);
}

.section-bg-3 {
  background-color: var(--section-bg-3);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-secondary);
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 0.25rem;
  transition: var(--transition-base);
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: #1D4ED8;
  border-color: #1D4ED8;
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Cards */
.card {
  background-color: white;
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: var(--transition-base);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Navigation */
.navbar {
  background-color: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.nav-link {
  color: #334155;
  padding: 0.5rem 1rem;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--primary-color);
  text-decoration: none;
}

/* Footer */
.footer {
  background-color: var(--footer-bg-color);
  color: white;
  padding: 3rem 0;
}

.footer a {
  color: white;
  opacity: 0.8;
}

.footer a:hover {
  color: white;
  opacity: 1;
  text-decoration: none;
}

/* Forms */
.form-control {
  border: 1px solid var(--secondary-color);
  border-radius: 0.25rem;
  padding: 0.75rem;
  transition: var(--transition-base);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

/* Animations */
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .section {
    padding: 3rem 0;
  }
}