/* ===================================
   Essential Utility Classes
   =================================== */

/* Display Utilities - 显示工具类 */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

/* Essential Flexbox Utilities - 基础 Flexbox 工具类 */
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-1 { flex: 1 1 0% !important; }

.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }

.items-center { align-items: center !important; }
.items-start { align-items: flex-start !important; }

/* Essential Grid Utilities - 基础 Grid 工具类 */
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)) !important; }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)) !important; }


/* Essential Spacing Utilities - 基础间距工具类 */
.m-0 { margin: 0 !important; }
.m-sm { margin: var(--spacing-sm) !important; }
.m-md { margin: var(--spacing-md) !important; }
.m-lg { margin: var(--spacing-lg) !important; }
.m-xl { margin: var(--spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-md { margin-bottom: var(--spacing-md) !important; }
.mb-lg { margin-bottom: var(--spacing-lg) !important; }

.mx-auto { margin-left: auto !important; margin-right: auto !important; }

/* Essential Padding Utilities - 基础内边距工具类 */
.p-0 { padding: 0 !important; }
.p-sm { padding: var(--spacing-sm) !important; }
.p-md { padding: var(--spacing-md) !important; }
.p-lg { padding: var(--spacing-lg) !important; }

.px-md { padding-left: var(--spacing-md) !important; padding-right: var(--spacing-md) !important; }
.py-md { padding-top: var(--spacing-md) !important; padding-bottom: var(--spacing-md) !important; }

/* Essential Text Utilities - 基础文字工具类 */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }

.text-sm { font-size: var(--font-size-sm) !important; }
.text-base { font-size: var(--font-size-base) !important; }
.text-lg { font-size: var(--font-size-lg) !important; }

.font-medium { font-weight: var(--font-weight-medium) !important; }
.font-bold { font-weight: var(--font-weight-bold) !important; }

.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }

.truncate {
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
}

/* Essential Background Utilities - 基础背景工具类 */
.bg-primary { background-color: var(--bg-primary) !important; }
.bg-secondary { background-color: var(--bg-secondary) !important; }

/* Essential Border Utilities - 基础边框工具类 */
.border { border: 1px solid var(--border-primary) !important; }
.rounded-md { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

/* Essential Position Utilities - 基础定位工具类 */
.relative { position: relative !important; }
.absolute { position: absolute !important; }
.fixed { position: fixed !important; }

/* Essential Width/Height Utilities - 基础宽高工具类 */
.w-full { width: 100% !important; }
.h-full { height: 100% !important; }

/* Essential Cursor Utilities - 基础光标工具类 */
.cursor-pointer { cursor: pointer !important; }

/* Essential Transition Utilities - 基础过渡工具类 */
.transition-all { transition: all var(--transition-normal) !important; }

/* Essential Responsive Utilities - 基础响应式工具类 */
@media (min-width: 768px) {
    .md\:d-block { display: block !important; }
    .md\:d-flex { display: flex !important; }
    .md\:text-center { text-align: center !important; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)) !important; }
}