html { scroll-behavior: smooth; }

.nav-link { position: relative; }
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: #2563eb;
  transition: width 0.25s ease;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link.active { color: #2563eb; font-weight: 600; }

.slide { opacity: 0; transition: opacity 0.6s ease; pointer-events: none; }
.slide.active { opacity: 1; pointer-events: auto; }

.card-hover { transition: transform 0.25s ease, box-shadow 0.25s ease; }
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(37, 99, 235, 0.15);
}

.modal-overlay { transition: opacity 0.25s ease; }
.modal-panel { transition: transform 0.25s ease, opacity 0.25s ease; }
.modal-hidden { display: none !important; }
.modal-hidden .modal-overlay { opacity: 0; pointer-events: none; }
.modal-hidden .modal-panel { opacity: 0; transform: scale(0.95) translateY(8px); }

.btn-auth { transition: transform 0.2s ease, box-shadow 0.2s ease; }
.btn-auth:hover { transform: translateY(-2px); }
.btn-auth:active { transform: translateY(0); }

.page-hero {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
}