/* Button sizes */
.btn-lg {
  padding: 0.75rem 1.5rem; /* 12px 24px */
  font-size: 1.125rem;     /* 18px */
  border-radius: 0.5rem;   /* 8px */
}

.btn-md {
  padding: 0.5rem 1rem;    /* 8px 16px */
  font-size: 1rem;         /* 16px */
}

.btn-sm {
  padding: 0.375rem 0.75rem; /* 6px 12px */
  font-size: 0.875rem;       /* 14px */
}

.btn-xs {
  padding: 0.25rem 0.5rem;  /* 4px 8px */
  font-size: 0.75rem;       /* 12px */
  border-radius: 0.25rem;   /* 4px */
}

.wf-head {
  border-bottom: 1px solid #e5e7eb; /* garis tipis */
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.08); /* bayangan halus */
}