* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, sans-serif;
}

body {
    background-color: #f3f4f6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.bg-primary {
    background-color: #1D3557;
}

.bg-gray-100 {
    background-color: #f3f4f6;
}

.bg-white {
    background-color: #ffffff;
}

.bg-gray-50 {
    background-color: #f9fafb;
}

.bg-gray-200 {
    background-color: #e5e7eb;
}

.bg-gray-800 {
    background-color: #1f2937;
}

.bg-green-500 {
    background-color: #22c55e;
}

.bg-green-600 {
    background-color: #16a34a;
}

.bg-purple-500 {
    background-color: #a855f7;
}

.bg-purple-600 {
    background-color: #9333ea;
}

.bg-secondary {
    background-color: #FF0000;
}

.bg-secondary\/90 {
    background-color: rgba(255, 0, 0, 0.9);
}

.text-white {
    color: #ffffff;
}

.text-primary {
    color: #1D3557;
}

.text-gray-700 {
    color: #374151;
}

.text-xl {
    font-size: 1.25rem;
}

.text-2xl {
    font-size: 1.5rem;
}

.font-bold {
    font-weight: 700;
}

.text-sm {
    font-size: 0.875rem;
}

.text-xs {
    font-size: 0.75rem;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

.flex-grow {
    flex-grow: 1;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.space-x-2 > * + * {
    margin-left: 0.5rem;
}

.space-x-4 > * + * {
    margin-left: 1rem;
}

.space-y-8 > * + * {
    margin-top: 2rem;
}

.gap-3 {
    gap: 0.75rem;
}

.gap-8 {
    gap: 2rem;
}

.shadow-md {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.shadow-lg {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.shadow-sm {
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.rounded-md {
    border-radius: 0.375rem;
}

.rounded-lg {
    border-radius: 0.5rem;
}

.p-2 {
    padding: 0.5rem;
}

.p-3 {
    padding: 0.75rem;
}

.p-4 {
    padding: 1rem;
}

.p-6 {
    padding: 1.5rem;
}

.px-2 {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

.px-4 {
    padding-left: 1rem;
    padding-right: 1rem;
}

.py-2 {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.py-4 {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.py-6 {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.py-8 {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-3 {
    margin-bottom: 0.75rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mr-2 {
    margin-right: 0.5rem;
}

.mr-3 {
    margin-right: 0.75rem;
}

.w-full {
    width: 100%;
}

.max-w-2xl {
    max-width: 42rem;
}

.aspect-square {
    aspect-ratio: 1 / 1;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.z-50 {
    z-index: 50;
}

.hidden {
    display: none;
}

.opacity-50 {
    opacity: 0.5;
}

.opacity-0 {
    opacity: 0;
}

.scale-95 {
    transform: scale(0.95);
}

.cursor-move {
    cursor: move;
}

.cursor-not-allowed {
    cursor: not-allowed;
}

.pointer-events-none {
    pointer-events: none;
}

.pointer-events-auto {
    pointer-events: auto;
}

.transition {
    transition: all 0.2s ease;
}

.rounded-full {
    border-radius: 9999px;
}

.grid {
    display: grid;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.hover\:bg-green-600:hover {
    background-color: #16a34a;
}

.hover\:bg-purple-600:hover {
    background-color: #9333ea;
}

.hover\:bg-secondary\/90:hover {
    background-color: rgba(255, 0, 0, 0.9);
}

@media (min-width: 768px) {
    .md\:text-2xl {
        font-size: 1.5rem;
        line-height: 2rem;
    }
}

@media (min-width: 1024px) {
    .lg\:w-1\/5 {
        width: 20%;
    }
    
    .lg\:w-4\/5 {
        width: 80%;
    }
    
    .lg\:flex-row {
        flex-direction: row;
    }
}

/* 游戏特定样式 */
.grid-bg {
    background-size: 12.5%, 12.5%;
    background-image: 
        linear-gradient(to right, rgba(0,0,0,0.2) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0,0,0,0.2) 1px, transparent 1px);
    background-color: white;
}

.piece-transition {
    transition: all 0.2s ease;
}

.game-border-7 {
    border: 7px solid #000000;
}

.piece-border-5 {
    border: 5px solid #000000;
    box-sizing: border-box;
}

.piece-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    color: #000;
    text-shadow: 1px 1px 2px rgba(255,255,255,0.7);
    pointer-events: none;
}

.piece-shadow {
    box-shadow: 0 0 0 9999px rgba(255,0,0,0.1);
    pointer-events: auto !important;
}

.white-piece-gradient {
    background-image: linear-gradient(135deg, #FFFFFF 0%, #F5F5F5 100%);
}

/* 蒙德里安颜色 */
.bg-mondrian-black {
    background-color: #000000;
}

.bg-mondrian-red {
    background-color: #FF0000;
}

.bg-mondrian-yellow {
    background-color: #FFFF00;
}

.bg-mondrian-blue {
    background-color: #0000FF;
}

.bg-mondrian-gray {
    background-color: #808080;
}

.bg-mondrian-white {
    background-color: #FFFFFF;
}

.bg-mondrian-yellow\/80 {
    background-color: rgba(255, 255, 0, 0.8);
}

.ring-2 {
    box-shadow: 0 0 0 2px rgba(29, 53, 87, 0.5);
}

.ring-primary {
    --tw-ring-color: #1D3557;
}

.ring-opacity-50 {
    --tw-ring-opacity: 0.5;
}