body {
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
  background: #f8f9fa;
}

section {
  scroll-margin-top: 80px;
}

.navbar-brand {
  letter-spacing: 1px;
  font-size: 1.5rem;
}

h1, h2, h3, h4, h5 {
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
}

.btn-primary, .btn-outline-primary {
  border-radius: 30px;
  font-weight: 500;
  padding-left: 32px;
  padding-right: 32px;
}

.card {
  border-radius: 18px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.04);
}

footer {
  letter-spacing: 0.5px;
  font-size: 1rem;
}

@media (max-width: 768px) {
  h1.display-4 {
    font-size: 2.2rem;
  }
  .navbar-brand {
    font-size: 1.1rem;
  }
  .btn-primary, .btn-outline-primary {
    padding-left: 18px;
    padding-right: 18px;
    font-size: 1rem;
  }
}