/**
 * IPMS Form Field Components
 * SPEC: SPEC-DESIGNSYS-001
 * Requirements: REQ-U-001, REQ-U-003, REQ-E-001, REQ-S-001, REQ-S-002
 *
 * Uses CSS custom properties from design-tokens.css
 */

/* Base Input - text, email, password, number, url, date, time */
.form-input {
  width: 100%;
  padding: var(--spacing-input-y) var(--spacing-input-x);
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-input);
  background-color: var(--color-bg-input);
  font-size: 1rem;
  line-height: 1.5;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-input::placeholder {
  color: var(--color-text-placeholder);
}

/* Focus State - REQ-S-001 */
.form-input:focus {
  outline: none;
  border-color: var(--color-border-input-focus);
  box-shadow: 0 0 0 var(--ring-width) var(--ring-color);
}

/* Disabled State - REQ-S-002 */
.form-input:disabled {
  background-color: var(--color-bg-input-disabled);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Error State - REQ-E-001 */
.form-input-error,
.form-input.is-invalid {
  border-color: var(--color-border-error);
}

.form-input-error:focus,
.form-input.is-invalid:focus {
  border-color: var(--color-border-error);
  box-shadow: 0 0 0 var(--ring-width) var(--color-error-ring);
}

/* Select Field */
.form-select {
  width: 100%;
  padding: var(--spacing-input-y) var(--spacing-input-x);
  padding-right: 2.5rem; /* space for arrow */
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-input);
  background-color: var(--color-bg-input);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  appearance: none;
  font-size: 1rem;
  line-height: 1.5;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-select:focus {
  outline: none;
  border-color: var(--color-border-input-focus);
  box-shadow: 0 0 0 var(--ring-width) var(--ring-color);
}

.form-select:disabled {
  background-color: var(--color-bg-input-disabled);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Textarea */
.form-textarea {
  width: 100%;
  min-height: 100px;
  padding: var(--spacing-input-y) var(--spacing-input-x);
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-input);
  background-color: var(--color-bg-input);
  font-size: 1rem;
  line-height: 1.5;
  resize: vertical;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-textarea:focus {
  outline: none;
  border-color: var(--color-border-input-focus);
  box-shadow: 0 0 0 var(--ring-width) var(--ring-color);
}

.form-textarea:disabled {
  background-color: var(--color-bg-input-disabled);
  cursor: not-allowed;
  opacity: 0.7;
}

/* File Input */
.form-file {
  width: 100%;
  padding: var(--spacing-input-y) var(--spacing-input-x);
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-input);
  background-color: var(--color-bg-input);
  font-size: 1rem;
  cursor: pointer;
}

.form-file:focus {
  outline: none;
  border-color: var(--color-border-input-focus);
  box-shadow: 0 0 0 var(--ring-width) var(--ring-color);
}

/* Checkbox and Radio (basic styling) */
.form-checkbox,
.form-radio {
  width: 1rem;
  height: 1rem;
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-input);
  cursor: pointer;
}

.form-radio {
  border-radius: 50%;
}

/* Radio and Checkbox Groups */
.form-radio-group,
.form-checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Label */
.form-label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-label);
}

.form-label-required::after {
  content: " *";
  color: var(--color-text-error);
}

/* Error Message */
.form-error-message {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--color-text-error);
}

/* Form Group (wrapper) */
.form-group {
  margin-bottom: 1rem;
}

/* Inline form elements */
.form-inline {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}