/* ===========================================
   📝 FORMS - 表单样式
   =========================================== */

/* ===== FORM GROUP ===== */
.form-group {
  margin-bottom: var(--space-6);
}

.form-group__label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.form-group__hint {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* ===== INPUT GROUP ===== */
.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group__icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  pointer-events: none;
  z-index: 1;
}

.input-group__suffix {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  pointer-events: none;
  z-index: 1;
}

/* ===== FORM INPUTS ===== */
.form-input,
.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: 1.5;
  border: var(--border-width) solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  background-color: #ffffff;
  color: var(--color-gray-900);
  transition: all var(--transition-fast);
}

.form-input {
  padding-left: 2.5rem;
}

.form-input::placeholder,
.form-control::placeholder {
  color: var(--color-gray-400);
}

.form-input:focus,
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input:hover,
.form-control:hover {
  border-color: var(--color-gray-400);
}

.form-input:disabled,
.form-control:disabled {
  background-color: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
}

/* ===== TEXTAREA ===== */
.form-control[rows] {
  resize: vertical;
  min-height: 80px;
}

/* ===== FORM SELECT ===== */
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-right: 2.5rem;
  font-size: var(--font-size-base);
  line-height: 1.5;
  border: var(--border-width) solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  background-color: #ffffff;
  color: var(--color-gray-900);
  cursor: pointer;
  transition: all var(--transition-fast);
  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;
}

.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-select:hover {
  border-color: var(--color-gray-400);
}

/* ===== FORM TEXTAREA ===== */
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: 1.5;
  border: var(--border-width) solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  background-color: #ffffff;
  color: var(--color-gray-900);
  resize: vertical;
  min-height: 80px;
  transition: all var(--transition-fast);
}

.form-textarea::placeholder {
  color: var(--color-gray-400);
}

.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea:hover {
  border-color: var(--color-gray-400);
}

/* ===== FORM ERRORS ===== */
.form-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-danger);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-error::before {
  content: '⚠';
  font-size: var(--font-size-xs);
}

/* ===== FORM SUCCESS ===== */
.form-success {
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-success);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-success::before {
  content: '✓';
  font-size: var(--font-size-xs);
}

/* ===== PASSWORD TOGGLE ===== */
.password-toggle {
  position: absolute;
  right: 10px !important;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-gray-400);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  z-index: 2;
}

.password-toggle:hover {
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
}

/* ===== PASSWORD STRENGTH ===== */
.password-strength {
  margin-top: var(--space-2);
}

.strength-meter {
  height: 4px;
  background-color: var(--color-gray-200);
  border-radius: var(--border-radius-full);
  overflow: hidden;
  margin-bottom: var(--space-1);
}

.strength-bar {
  height: 100%;
  background-color: var(--color-danger);
  border-radius: var(--border-radius-full);
  transition: width var(--transition-fast), background-color var(--transition-fast);
  width: 0%;
}

.strength-bar--weak {
  width: 33%;
  background-color: var(--color-danger);
}

.strength-bar--medium {
  width: 66%;
  background-color: var(--color-warning);
}

.strength-bar--strong {
  width: 100%;
  background-color: var(--color-success);
}

.strength-text {
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  font-weight: var(--font-weight-medium);
}

/* ===== FORM ROW ===== */
.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== CHECKBOX ===== */
.checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.checkbox__input {
  width: 16px;
  height: 16px;
  border: var(--border-width) solid var(--color-gray-300);
  border-radius: var(--border-radius-sm);
  background-color: #ffffff;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  position: relative;
}

.checkbox__input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox__input:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ffffff;
  font-size: 12px;
  font-weight: bold;
}

.checkbox__input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.checkbox__label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  cursor: pointer;
  user-select: none;
}

/* ===== RADIO ===== */
.radio {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.radio__input {
  width: 16px;
  height: 16px;
  border: var(--border-width) solid var(--color-gray-300);
  border-radius: var(--border-radius-full);
  background-color: #ffffff;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  position: relative;
}

.radio__input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.radio__input:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  background-color: #ffffff;
  border-radius: var(--border-radius-full);
}

.radio__input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.radio__label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  cursor: pointer;
  user-select: none;
}

/* ===== FORM ACTIONS ===== */
.form-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding-top: var(--space-4);
  border-top: var(--border-width) solid var(--color-gray-200);
}

/* ===== FORM VALIDATION ===== */
.form-group--error .form-input,
.form-group--error .form-control {
  border-color: var(--color-danger);
}

.form-group--error .form-input:focus,
.form-group--error .form-control:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group--success .form-input,
.form-group--success .form-control {
  border-color: var(--color-success);
}

.form-group--success .form-input:focus,
.form-group--success .form-control:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* ===== SEARCH BOX ===== */
.search-box {
  position: relative;
  width: 100%;
}

.search-box__input {
  width: 100%;
  padding: var(--space-3) 5rem var(--space-3) 2.5rem;
  font-size: var(--font-size-sm);
  border: var(--border-width) solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  background-color: #ffffff;
  color: var(--color-gray-900);
  transition: all var(--transition-fast);
  line-height: 1.5;
  box-sizing: border-box;
}

.search-box__input::placeholder {
  color: var(--color-gray-400);
}

.search-box__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-box__icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
}

.search-box__button {
  position: absolute;
  right: 2.5rem;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--color-primary);
  color: white;
  border: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  height: calc(100% - 2 * var(--space-3));
  box-sizing: border-box;
}

.search-box__button:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-50%) scale(1.05);
}

.search-box__button:active {
  transform: translateY(-50%) scale(0.95);
}

.search-box__clear {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-gray-400);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  display: none;
}

.search-box__clear:hover {
  background-color: var(--color-gray-100);
  color: var(--color-gray-600);
}

/* ===== 2FA VERIFICATION ===== */
#tfaVerificationContainer {
  display: none;
}

#tfaVerificationContainer .auth-form__content {
  max-width: 400px;
}

#tfaVerificationContainer .auth-form__description {
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
  text-align: center;
}

#tfaVerificationContainer .form-label {
  display: block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

#tfaVerificationContainer .input-icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: var(--font-size-lg);
  pointer-events: none;
  z-index: 1;
}

#tfaVerificationContainer .form-input {
  padding-left: 3.5rem;
}

#tfaVerificationContainer .form-hint {
  display: block;
  margin-top: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.5;
}

#tfaVerificationContainer .form-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: space-between;
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

#tfaVerificationContainer .form-actions .btn {
  flex: 1;
  min-width: 140px;
  max-width: calc(50% - var(--space-3));
}

#tfaVerificationContainer .auth-form__footer {
  text-align: center;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
}

#tfaVerificationContainer .auth-form__footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

#tfaVerificationContainer .auth-form__footer a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  #tfaVerificationContainer .form-actions {
    flex-direction: column;
    gap: var(--space-2);
  }

  #tfaVerificationContainer .form-actions .btn {
    max-width: 100%;
    min-width: auto;
  }
}

/* ===== 2FA MANAGEMENT MODAL ===== */
.security-options {
  margin-top: 20px;
}

.option-item {
  padding: 20px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-md);
  margin-bottom: 15px;
  background: var(--color-gray-50);
}

.option-item h4 {
  margin: 0 0 10px 0;
  color: var(--color-gray-900);
  font-size: var(--font-size-lg);
  display: flex;
  align-items: center;
  gap: 8px;
}

.option-item h4 i {
  color: var(--color-primary);
}

.option-item p {
  margin: 10px 0 15px 0;
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
}

.option-item.danger {
  border-color: var(--color-danger);
  background: rgba(220, 53, 69, 0.05);
}

.option-item.danger h4 {
  color: var(--color-danger);
}

.option-item.danger h4 i {
  color: var(--color-danger);
}

/* ===== 2FA SETUP MODAL ===== */
.modal-large {
  max-width: 600px;
}

.tfa-setup-content {
  margin-top: var(--space-4);
}

.tfa-step {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.tfa-step:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.tfa-step h4 {
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-lg);
}

.tfa-step p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}

.app-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.app-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  transition: all var(--transition-fast);
  flex: 1;
  justify-content: center;
}

.app-link:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.qr-code-container {
  text-align: center;
  margin: var(--space-4) 0;
  padding: var(--space-4);
  background-color: var(--color-gray-50);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-gray-200);
}

.qr-code-image {
  max-width: 200px;
  height: auto;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-sm);
}

.secret-key-info {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-yellow-50);
  border: 1px solid var(--color-yellow-200);
  border-radius: var(--border-radius-md);
}

.secret-key-info p {
  margin-bottom: var(--space-2);
}

.secret-key-display {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-2) 0;
  padding: var(--space-2);
  background-color: var(--color-white);
  border: 1px solid var(--color-yellow-300);
  border-radius: var(--border-radius-sm);
}

.secret-key-display code {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-size: var(--font-size-sm);
  font-weight: bold;
  color: var(--color-gray-900);
  word-break: break-all;
}

.secret-key-display .btn--small {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

.text-muted {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.search-box--has-value .search-box__clear {
  display: block;
}