:root {
  --sky-blue: #00bfff;
  --sky-blue-dark: #009acd;
  --light-bg: #f8f9fa;
  --white: #ffffff;
  --text-dark: #333333;
  --text-muted: #666666;
}

body {
  background: var(--light-bg);
  color: var(--text-dark);
  font-family: 'Inter', sans-serif;
}

h1, h2, h3, h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
}

.text-sky { color: var(--sky-blue) !important; }

.navbar {
  background: var(--white) !important;
}

.navbar-brand {
  color: var(--sky-blue) !important;
}

.nav-link {
  color: var(--text-dark) !important;
  transition: color 0.3s;
}

.nav-link:hover {
  color: var(--sky-blue) !important;
}

.hero {
  background: linear-gradient(135deg, #e0f7ff 0%, #ffffff 100%);
  min-height: 50vh;
  display: flex;
  align-items: center;
}

.btn-enroll {
  background: var(--sky-blue);
  color: white;
  border: none;
  padding: 14px 32px;
  font-weight: 600;
  border-radius: 50px;
  box-shadow: 0 8px 25px rgba(0, 191, 255, 0.3);
  transition: all 0.3s ease;
}

.btn-enroll:hover {
  background: var(--sky-blue-dark);
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(0, 191, 255, 0.5);
}

.card {
  border-radius: 16px;
  background: white;
}

.border-sky {
  border-color: var(--sky-blue) !important;
}

.bg-light {
  background: #f0f8ff !important; /* very light sky */
}

.accordion-button {
  font-weight: 600;
}

.accordion-button:not(.collapsed) {
  background: rgba(0, 191, 255, 0.1);
  color: var(--sky-blue-dark);
}

.modal-content {
  border-radius: 16px;
  border: none;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

.form-control:focus {
  border-color: var(--sky-blue);
  box-shadow: 0 0 0 0.25rem rgba(0, 191, 255, 0.25);
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
}