html {
  scroll-behavior: smooth;
}

.fade-in {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.btn {
  display: inline-block;
  padding: 10px 15px;
  margin-right: 10px;
  margin-left: 10px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  color: #3b82f6;
  text-decoration: none;
  transition: all 0.3s ease;
}
.btn:hover {
  background: #0000ff;
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.card {
  background: #1e293b;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}