/* ============================================
   Input 组件 - Input Component
   ============================================ */

/* ========== 基础输入框样式 ========== */
input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="search"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea,
select {
  width: 100%;
  height: var(--height-input);
  padding: 0 var(--spacing-3);
  font-size: var(--font-base);
  line-height: var(--height-input);
  color: var(--color-text-primary);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
  font-family: inherit;
}

/* ========== 文本域 ========== */
textarea {
  height: auto;
  min-height: 80px;
  padding: var(--spacing-3);
  line-height: var(--line-height-normal);
  resize: vertical;
}

/* ========== 聚焦状态 ========== */
input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
input[type="search"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
textarea:focus,
select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha-10);
}

/* ========== 禁用状态 ========== */
input[type="text"]:disabled,
input[type="password"]:disabled,
input[type="email"]:disabled,
input[type="number"]:disabled,
input[type="search"]:disabled,
input[type="tel"]:disabled,
input[type="url"]:disabled,
input[type="date"]:disabled,
input[type="time"]:disabled,
input[type="datetime-local"]:disabled,
textarea:disabled,
select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========== 只读状态 ========== */
input[type="text"]:read-only,
input[type="password"]:read-only,
input[type="email"]:read-only,
input[type="number"]:read-only,
input[type="search"]:read-only,
input[type="tel"]:read-only,
input[type="url"]:read-only,
textarea:read-only {
  background: var(--color-bg-secondary);
  cursor: default;
}

/* ========== 错误状态 ========== */
.input-error input,
.input-error textarea,
.input-error select {
  border-color: var(--color-danger);
}

.input-error input:focus,
.input-error textarea:focus,
.input-error select:focus {
  box-shadow: 0 0 0 3px var(--color-danger-alpha-10);
}

.error-message {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-xs);
  color: var(--color-danger);
}

/* ========== 成功状态 ========== */
.input-success input,
.input-success textarea,
.input-success select {
  border-color: var(--color-success);
}

.input-success input:focus,
.input-success textarea:focus,
.input-success select:focus {
  box-shadow: 0 0 0 3px var(--color-success-alpha-10);
}

.success-message {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-xs);
  color: var(--color-success);
}

/* ========== 输入框组 ========== */
.input-group {
  display: flex;
  align-items: stretch;
}

.input-group input {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  flex: 1;
}

.input-group .btn {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  height: var(--height-input);
}

.input-group .input-group-addon {
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-3);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-left: none;
  color: var(--color-text-muted);
  font-size: var(--font-sm);
}

.input-group .input-group-addon:first-child {
  border-left: 1px solid var(--color-border);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

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

/* ========== 搜索输入框 ========== */
.input-search {
  position: relative;
}

.input-search::before {
  content: '';
  position: absolute;
  left: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'/%3E%3C/svg%3E");
  background-size: contain;
  opacity: 0.5;
  pointer-events: none;
}

.input-search input {
  padding-left: 36px;
}

/* ========== 带图标输入框 ========== */
.input-with-icon {
  position: relative;
}

.input-icon {
  position: absolute;
  left: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.input-icon-right {
  left: auto;
  right: var(--spacing-3);
}

.input-with-icon input {
  padding-left: 36px;
}

.input-with-icon input.with-icon-right {
  padding-right: 36px;
}

/* ========== 标签 ========== */
.form-label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-size: var(--font-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.form-label.required::after {
  content: '*';
  color: var(--color-danger);
  margin-left: 2px;
}

/* ========== 提示文字 ========== */
.form-hint {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-xs);
  color: var(--color-text-muted);
}

/* ========== 尺寸变体 ========== */
.input-sm {
  height: 30px;
  padding: 0 var(--spacing-2);
  font-size: var(--font-sm);
}

.input-lg {
  height: 42px;
  padding: 0 var(--spacing-4);
  font-size: var(--font-lg);
}

/* ========== 复选框和单选框 ========== */
input[type="checkbox"],
input[type="radio"] {
  width: 16px;
  height: 16px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.checkbox-label,
.radio-label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  cursor: pointer;
  font-size: var(--font-base);
  color: var(--color-text-primary);
}

.checkbox-group,
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.checkbox-group-inline,
.radio-group-inline {
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

/* ========== 开关按钮 ========== */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-border);
  transition: all var(--transition-fast);
  border-radius: 24px;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: all var(--transition-fast);
  border-radius: 50%;
  box-shadow: var(--shadow-xs);
}

.switch input:checked + .switch-slider {
  background-color: var(--color-primary);
}

.switch input:checked + .switch-slider:before {
  transform: translateX(20px);
}

/* ========== 文件输入框 ========== */
.file-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.file-input-label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: 0 var(--spacing-4);
  height: var(--height-input);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-base);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.file-input-label:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.file-name {
  font-size: var(--font-sm);
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

/* ========== 选择框 ========== */
select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  background-size: 16px;
  padding-right: 36px;
}

select option {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
}

/* ========== 多行输入框自动大小 ========== */
textarea.auto-resize {
  overflow: hidden;
  resize: none;
}