:root {
  --bs-primary: #0d6efd;
  --bs-secondary: #6c757d;
  --bs-success: #198754;
  --bs-info: #0dcaf0;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-light: #f8f9fa;
  --bs-dark: #212529;
  --bs-font-sans-serif: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bs-body-font-size: 1rem;
  --bs-body-line-height: 1.6;
  --bs-border-radius: 0.5rem;
  --bs-border-radius-sm: 0.25rem;
  --bs-border-radius-lg: 0.75rem;
  --bs-border-radius-xl: 1rem;
  --bs-box-shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
  --bs-box-shadow-sm: 0 0.05rem 0.2rem rgba(0,0,0,0.05);
  --bs-box-shadow-lg: 0 0.5rem 1rem rgba(0,0,0,0.1);
}

[data-bs-theme="dark"] {
  --bs-light: #212529;
  --bs-dark: #f8f9fa;
}

body {
  font-family: var(--bs-font-sans-serif);
  font-size: var(--bs-body-font-size);
  line-height: var(--bs-body-line-height);
  scroll-behavior: smooth;
}

a {
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

.btn {
  transition: all 0.2s ease-in-out;
}

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

.card {
  border-radius: var(--bs-border-radius-lg);
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--bs-box-shadow-lg);
}

.navbar-brand {
  font-size: 1.25rem;
}

.hero {
  background: linear-gradient(135deg, var(--bs-light) 0%, var(--bs-white) 100%);
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease-out both;
}

.animate-fadeInUp.delay-1 {
  animation-delay: 0.2s;
}

.animate-fadeInUp.delay-2 {
  animation-delay: 0.4s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.show {
  opacity: 1;
  transform: translateY(0);
}

.theme-toggle {
  border: none;
  background: transparent;
  font-size: 1.1rem;
}

footer a:hover {
  color: var(--bs-primary) !important;
}

@media (max-width: 576px) {
  .hero h1 {
    font-size: 2rem;
  }
  .btn-lg {
    font-size: 1rem;
    padding: 0.5rem 1.25rem;
  }
}