/* ==================== 动画效果 ==================== */

/* 脉冲动画 */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* 弹跳动画 - 结果图标 */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 淡入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 正确答案脉冲 */
@keyframes correctPulse {
    0% {
        transform: scale(0.97);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(0.97);
    }
}

/* 卡片进入动画 */
.card {
    animation: fadeIn 0.5s ease-out;
}

/* 方格单元格进入动画 */
.grid-cell {
    animation: fadeIn 0.3s ease-out;
}

/* 添加交错动画效果 */
.grid-cell:nth-child(odd) {
    animation-delay: 0.05s;
}

.grid-cell:nth-child(even) {
    animation-delay: 0.1s;
}

/* 减少动画（为偏好减少动态效果的用户） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}