/*
 * Unified Form Component System
 * ==============================
 * A consistent form system with inputs, selects, textareas, and form layouts.
 *
 * Usage:
 *   <div class="form-group">
 *     <label class="form-label">Email</label>
 *     <input type="email" class="form-input" placeholder="you@example.com">
 *   </div>
 *
 *   <div class="form-group">
 *     <label class="form-label">Country</label>
 *     <select class="form-select">
 *       <option>Choose...</option>
 *     </select>
 *   </div>
 *
 * Layouts:
 *   <div class="form-row">
 *     <div class="form-group">...</div>
 *     <div class="form-group">...</div>
 *   </div>
 *
 * With hints/errors:
 *   <div class="form-group">
 *     <label class="form-label">Password <span class="form-hint">(6 characters min)</span></label>
 *     <input type="password" class="form-input">
 *     <span class="form-error">Password is too short</span>
 *   </div>
 */

/* ==========================================
 * FORM LAYOUT
 * ========================================== */

/* Form Group - Container for label + input */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Form Row - Horizontal layout for multiple form groups */
.form-row {
  display: flex;
  flex-wrap: wrap;
}

.form-row > .form-group {
  flex: 1 1 calc(50% - var(--space-4));
  min-width: 200px;
  margin-right: var(--space-6);
  margin-bottom: var(--space-4);
}

.form-row > .form-group:last-child {
  margin-right: 0;
}

/* Form Actions - Container for submit buttons */
.form-actions {
  margin-top: var(--space-4);
}

/* ==========================================
 * FORM LABELS
 * ========================================== */

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  line-height: var(--line-height-tight);
}

/* Hint text - inline with label or below input */
.form-hint {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-light);
}

/* Required indicator */
.form-label-required::after {
  content: ' *';
  color: var(--color-error-500);
}

/* ==========================================
 * BASE INPUT STYLES
 * ========================================== */

.form-input,
.form-select,
.form-textarea {
  /* Layout */
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);

  /* Typography */
  font-family: var(--font-family-sans);
  font-size: var(--input-font-size);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);

  /* Appearance */
  background: var(--input-bg);
  border: var(--input-border-width) solid var(--input-border-color);
  border-radius: var(--input-border-radius);

  /* Transitions */
  transition:
    border-color var(--transition-default),
    box-shadow var(--transition-default),
    background-color var(--transition-default);
}

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

/* ==========================================
 * INPUT STATES
 * ========================================== */

/* Focus State */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--input-border-color-focus);
  box-shadow: 0 0 0 3px var(--color-primary-50);
}

/* Hover State */
.form-input:hover:not(:focus):not(:disabled),
.form-select:hover:not(:focus):not(:disabled),
.form-textarea:hover:not(:focus):not(:disabled) {
  border-color: var(--color-border-dark);
}

/* Disabled State */
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--color-bg-disabled);
  color: var(--color-text-disabled);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Read-only State */
.form-input:read-only,
.form-textarea:read-only {
  background-color: var(--color-bg-secondary);
  cursor: default;
}

/* Error State */
.form-input.is-invalid,
.form-select.is-invalid,
.form-textarea.is-invalid,
.form-group.has-error .form-input,
.form-group.has-error .form-select,
.form-group.has-error .form-textarea {
  border-color: var(--color-error-500);
}

.form-input.is-invalid:focus,
.form-select.is-invalid:focus,
.form-textarea.is-invalid:focus,
.form-group.has-error .form-input:focus,
.form-group.has-error .form-select:focus,
.form-group.has-error .form-textarea:focus {
  box-shadow: 0 0 0 3px var(--color-error-50);
}

/* Success State */
.form-input.is-valid,
.form-select.is-valid,
.form-textarea.is-valid {
  border-color: var(--color-success-500);
}

.form-input.is-valid:focus,
.form-select.is-valid:focus,
.form-textarea.is-valid:focus {
  box-shadow: 0 0 0 3px var(--color-success-50);
}

/* ==========================================
 * SELECT SPECIFIC STYLES
 * ========================================== */

.form-select {
  appearance: none;
  cursor: pointer;
  padding-right: var(--space-10);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
}

.form-select:focus {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%233498db' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* ==========================================
 * TEXTAREA SPECIFIC STYLES
 * ========================================== */

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-textarea-sm {
  min-height: 80px;
}

.form-textarea-lg {
  min-height: 200px;
}

/* ==========================================
 * CHECKBOX & RADIO
 * ========================================== */

.form-group-checkbox,
.form-group-radio {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-checkbox,
.form-radio {
  width: var(--space-5);
  height: var(--space-5);
  accent-color: var(--color-primary-500);
  cursor: pointer;
}

.form-checkbox-label,
.form-radio-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
}

/* ==========================================
 * ERROR & HELPER MESSAGES
 * ========================================== */

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-error-600);
  margin-top: var(--space-1);
}

.form-help {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-top: var(--space-1);
}

/* ==========================================
 * FORM NOTICE / ALERT BOXES
 * ========================================== */

.form-notice {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-default);
  font-size: var(--font-size-sm);
}

.form-notice-info {
  background: var(--color-info-50);
  border: var(--border-width-1) solid var(--color-info-200);
  color: var(--color-info-800);
}

.form-notice-warning {
  background: var(--color-warning-100);
  border: var(--border-width-1) solid var(--color-warning-500);
  color: var(--color-warning-800);
}

.form-notice-error {
  background: var(--color-error-50);
  border: var(--border-width-1) solid var(--color-error-200);
  color: var(--color-error-800);
}

.form-notice-success {
  background: var(--color-success-50);
  border: var(--border-width-1) solid var(--color-success-200);
  color: var(--color-success-800);
}

/* ==========================================
 * INPUT SIZES
 * ========================================== */

/* Small inputs */
.form-input-sm,
.form-select-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

/* Large inputs */
.form-input-lg,
.form-select-lg {
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-lg);
}

/* ==========================================
 * INPUT GROUP (with icons or addons)
 * ========================================== */

.input-group {
  display: flex;
  align-items: stretch;
}

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

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

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

.input-group-addon {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  background: var(--color-bg-secondary);
  border: var(--input-border-width) solid var(--input-border-color);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

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

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

/* ==========================================
 * BROWSER AUTOFILL OVERRIDE
 * ========================================== */

/* Override browser autofill background color */
.form-input:-webkit-autofill,
.form-input:-webkit-autofill:hover,
.form-input:-webkit-autofill:focus,
.form-input:-webkit-autofill:active,
.form-select:-webkit-autofill,
.form-select:-webkit-autofill:hover,
.form-select:-webkit-autofill:focus,
.form-select:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px var(--input-bg) inset;
  -webkit-text-fill-color: var(--color-text-primary);
  box-shadow: 0 0 0 1000px var(--input-bg) inset;
  transition: background-color 5000s ease-in-out 0s;
}

/* ==========================================
 * INPUT TYPE MODIFIERS
 * ========================================== */

/*
 * These are modifier classes to be used WITH .form-input
 * They only adjust specific properties, not redefine the entire input
 */

/* Search input - slightly more horizontal padding */
.search-input {
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

/* Date input - uses base .form-input styles, no overrides needed */
.date-input {
  /* Inherits all styles from .form-input */
  /* Add specific date input overrides here if needed */
}

/* ==========================================
 * RESPONSIVE ADJUSTMENTS
 * ========================================== */

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .form-input,
  .form-select,
  .form-textarea {
    font-size: var(--font-size-base); /* Prevent zoom on iOS */
  }
}