/* 分类统计样式 */
.category-stats {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.category-stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    background: rgba(74, 158, 255, 0.08);
    border-radius: 8px;
    transition: all 0.3s;
}

.category-stat-item:hover {
    background: rgba(74, 158, 255, 0.15);
    transform: translateX(3px);
}

.category-icon {
    font-size: 24px;
}

.category-info {
    flex: 1;
}

.category-name {
    font-size: 13px;
    color: #e0e8f0;
    margin-bottom: 4px;
}

.category-count {
    font-size: 11px;
    color: #4a9eff;
}

/* 难度分布样式 */
.difficulty-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.difficulty-bar {
    display: flex;
    align-items: center;
    gap: 8px;
}

.difficulty-label {
    font-size: 12px;
    color: #ccc;
    width: 40px;
}

.difficulty-progress {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.difficulty-fill {
    height: 100%;
    transition: width 0.6s ease;
    border-radius: 4px;
}

.difficulty-value {
    font-size: 12px;
    color: #4a9eff;
    font-weight: bold;
    min-width: 30px;
    text-align: right;
}