.btn {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius, 4px);
  font-size: 14px;
  cursor: pointer;
  text-align: center;
  line-height: 1.4;
}
.btn:hover {
  text-decoration: none;
}
.btn--primary {
  background: #0066cc;
  color: #fff;
}
.btn--secondary {
  background: #f0f0f0;
  color: #222;
  border-color: #ccc;
}
.btn--success {
  background: #2e8b57;
  color: #fff;
}
.btn--danger {
  background: #c0392b;
  color: #fff;
}
.btn--sm {
  padding: 4px 10px;
  font-size: 12px;
}
.btn--lg {
  padding: 12px 24px;
  font-size: 16px;
}
.btn--block {
  display: block;
  width: 100%;
}
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}