/* form, unified form layout & styling */

.pd-form {
  display: flex;
  flex-direction: column;
  gap: var(--pd-space-4);
}

.pd-form--inline {
  flex-direction: row;
  align-items: flex-end;
  gap: var(--pd-space-2);
}
.pd-form--inline .pd-field {
  flex: 1;
  margin-bottom: 0;
}
.pd-form--inline .pd-field:last-child {
  flex: 0 0 auto;
}

.pd-form--compact {
  gap: var(--pd-space-2);
}

/* Form section (fieldset) */
.pd-form-section {
  display: flex;
  flex-direction: column;
  gap: var(--pd-space-3);
  padding: var(--pd-space-4) 0;
}
.pd-form-section:not(:last-child) {
  border-bottom: var(--pd-border);
}

.pd-form-section__legend {
  font-size: var(--pd-fs-md);
  font-weight: var(--pd-fw-bold);
  color: var(--pd-neutral-900);
  margin: 0;
}
.pd-form-section__description {
  font-size: var(--pd-fs-sm);
  color: var(--pd-neutral-600);
  margin: 0;
}

/* Form group with label + input + error */
.pd-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--pd-space-1);
}

/* Two column layout for mobile optimization */
.pd-form--2col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pd-space-4);
}
@media (min-width: 600px) {
  .pd-form--2col { grid-template-columns: 1fr 1fr; }
  .pd-form--2col .pd-form-group:nth-child(odd):last-child {
    grid-column: 1 / -1;
    max-width: 50%;
  }
}

/* Form actions (submit + secondary actions) */
.pd-form-actions {
  display: flex;
  flex-direction: column;
  gap: var(--pd-space-3);
  padding-top: var(--pd-space-3);
  border-top: var(--pd-border);
}
@media (min-width: 480px) {
  .pd-form-actions {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.pd-form-actions__primary { flex: 1; }
.pd-form-actions__secondary {
  display: flex;
  gap: var(--pd-space-2);
}

/* Loading state */
.pd-form.is-loading {
  pointer-events: none;
  opacity: 0.6;
}
.pd-form.is-loading .pd-btn { position: relative; }
.pd-form.is-loading .pd-btn span { visibility: hidden; }
.pd-form.is-loading .pd-btn::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--pd-white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 600ms linear infinite;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Validation feedback */
.pd-form-feedback {
  font-size: var(--pd-fs-xs);
  color: var(--pd-danger);
  display: none;
}
.pd-form-group.has-error .pd-form-feedback { display: block; }

/* Success state */
.pd-form.is-success { color: var(--pd-success); }

/* Helper text */
.pd-form-helper {
  font-size: var(--pd-fs-xs);
  color: var(--pd-neutral-600);
  margin-top: 4px;
}