/* TailwindCSS 备用样式 - 核心功能 */

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Display */
.flex { display: flex; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }
.grid { display: grid; }

/* Flex */
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Width & Height */
.w-5 { width: 1.25rem; }
.w-8 { width: 2rem; }
.w-64 { width: 16rem; }
.w-full { width: 100%; }
.h-5 { height: 1.25rem; }
.h-8 { height: 2rem; }
.h-screen { height: 100vh; }
.min-h-screen { min-height: 100vh; }

/* Colors - Background */
.bg-slate-900 { background-color: #0f172a; }
.bg-slate-800 { background-color: #1e293b; }

/* Colors - Text */
.text-white { color: #ffffff; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-blue-500 { color: #3b82f6; }

/* Border */
.border-r { border-right: 1px solid; }
.border-b { border-bottom: 1px solid; }
.border-slate-800 { border-color: #1e293b; }

/* Spacing - Padding */
.p-6 { padding: 1.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

/* Spacing - Margin */
.mt-1 { margin-top: 0.25rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mr-2 { margin-right: 0.5rem; }

/* Typography */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.text-center { text-align: center; }

/* Grid */
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.col-span-2 { grid-column: span 2 / span 2; }
.col-span-3 { grid-column: span 3 / span 3; }

/* Responsive Grid - Desktop */
@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.sticky { position: sticky; }
.top-0 { top: 0; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Table */
.table-auto { table-layout: auto; }
.min-w-full { min-width: 100%; }

/* Rounded */
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

/* Shadow */
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); }

/* Space */
.space-x-2 > * + * { margin-left: 0.5rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }

/* Line height */
.leading-relaxed { line-height: 1.625; }

/* Z-index */
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

/* Position - Fixed and other positioning utilities */
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }

/* Backdrop blur */
.backdrop-blur-sm { backdrop-filter: blur(4px); }
.bg-black\/60 { background-color: rgba(0, 0, 0, 0.6); }

/* Max width and height utilities */
.max-w-6xl { max-width: 72rem; }
.max-h-\[90vh\] { max-height: 90vh; }

/* Transform for centering */
.-translate-x-1\/2 { transform: translateX(-50%); }
.-translate-y-1\/2 { transform: translateY(-50%); }
.top-1\/2 { top: 50%; }
.left-1\/2 { left: 50%; }

/* Overflow utilities */
.overflow-y-auto { overflow-y: auto; }