/* ==========================================================================
   FORMS.CSS — Form Component System
   CRM + HRMS Platform | Infusion Business Intelligence
   ==========================================================================
   Structure (SKILL 05):
     .form-group#group-{field}
       > .form-label  (+ .required span for asterisk)
       > .form-input | .form-select | .form-textarea
       > .form-error#error-{field}
       > .form-hint   (optional helper text)
   
   Error state:  .has-error on .form-group highlights input + shows error
   Disabled:     [disabled] attribute dims the field
   ========================================================================== */

/* ------------------------------------------------------------------
   1. Form group — wrapper with bottom spacing
   ------------------------------------------------------------------ */
.form-group {
  margin-bottom: var(--space-2);
  position: relative;
}

.form-group:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------------
   2. Form label — bold, small, with required asterisk
   ------------------------------------------------------------------ */
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-label .required {
  color: var(--danger);
  margin-left: 2px;
  font-weight: 700;
}

/* ------------------------------------------------------------------
   3. Shared input styles — input, select, textarea
   ------------------------------------------------------------------ */
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-base);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  outline: none;
}

/* Placeholder */
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

/* Focus — company-primary ring */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--company-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Hover (when not focused or errored) */
.form-input:hover:not(:focus):not(:disabled),
.form-select:hover:not(:focus):not(:disabled),
.form-textarea:hover:not(:focus):not(:disabled) {
  border-color: var(--text-muted);
}

/* ------------------------------------------------------------------
   4. Select — custom dropdown arrow
   ------------------------------------------------------------------ */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23718096' d='M1.41 0L6 4.58 10.59 0 12 1.41l-6 6-6-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 12px;
  padding-right: 36px;
  cursor: pointer;
}

/* ------------------------------------------------------------------
   5. Textarea — min height, vertical resize only
   ------------------------------------------------------------------ */
.form-textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.5;
}

/* ------------------------------------------------------------------
   6. Error state — .has-error on .form-group
   ------------------------------------------------------------------ */
.form-error {
  display: block;
  font-size: var(--text-sm);
  color: var(--danger);
  margin-top: 4px;
  min-height: 0;
  transition: all var(--transition-fast);
}

/* When empty, the error span takes no space */
.form-error:empty {
  display: none;
}

/* Highlight input border on error */
.form-group.has-error .form-input,
.form-group.has-error .form-select,
.form-group.has-error .form-textarea {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Focus within error state */
.form-group.has-error .form-input:focus,
.form-group.has-error .form-select:focus,
.form-group.has-error .form-textarea:focus {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

/* Error label color */
.form-group.has-error .form-label {
  color: var(--danger);
}

/* ------------------------------------------------------------------
   7. Hint — muted helper text below input
   ------------------------------------------------------------------ */
.form-hint {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 4px;
}

/* ------------------------------------------------------------------
   8. Disabled state
   ------------------------------------------------------------------ */
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--content-bg);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-label.disabled,
.form-group.disabled .form-label {
  color: var(--text-muted);
}

/* ------------------------------------------------------------------
   9. Checkbox & radio — custom styled
   ------------------------------------------------------------------ */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--company-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.form-check-label {
  font-size: var(--text-base);
  color: var(--text-primary);
  user-select: none;
}

/* ------------------------------------------------------------------
   10. Form actions — button row at bottom of forms
   ------------------------------------------------------------------ */
.form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-1);
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-color);
}

/* ------------------------------------------------------------------
   11. Form row — side-by-side fields
   ------------------------------------------------------------------ */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

@media (max-width: 639px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------------
   12. Input group — input with prefix/suffix
   ------------------------------------------------------------------ */
.input-group {
  display: flex;
  align-items: stretch;
}

.input-group .form-input {
  border-radius: 0;
  flex: 1;
}

.input-group .form-input:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group .form-input:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  background: var(--content-bg);
  border: 1px solid var(--border-color);
  white-space: nowrap;
}

.input-group-text:first-child {
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group-text:last-child {
  border-left: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}