/**
 * 快速排序可视化样式
 * @author changyadai
 * 
 * 算法特有样式 - 分区、基准和指针动画
 */

/* ==================== 递归深度指示器 ==================== */
.depth-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.depth-label {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.depth-bars {
    display: flex;
    gap: 4px;
}

.depth-bar {
    width: 20px;
    height: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.depth-bar.active {
    background: linear-gradient(90deg, #f97316 0%, #fbbf24 100%);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.5);
}

/* ==================== 指针图例 ==================== */
.pointer-legend {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.legend-item .icon {
    font-size: 1.1rem;
}

.legend-item.pivot .icon {
    color: #fbbf24;
    text-shadow: 0 0 10px rgba(251, 191, 36, 0.8);
}

.legend-item.left-ptr .icon {
    color: #3b82f6;
}

.legend-item.right-ptr .icon {
    color: #ef4444;
}

/* ==================== 数组容器 ==================== */
.array-wrapper {
    position: relative;
    margin-bottom: 20px;
    padding-top: 35px; /* 为 pivot 图标和指针标签留出空间 */
    min-height: 200px; /* 确保有足够空间显示柱状条和上方元素 */
    overflow: visible;
}

/* ==================== 柱状条样式 ==================== */
.bar {
    width: 50px;
    border-radius: 6px 6px 3px 3px;
    background: linear-gradient(180deg, #f97316 0%, #ea580c 50%, #c2410c 100%);
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    padding-bottom: 8px;
    font-size: 13px;
    font-weight: bold;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 30%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.3) 0%, transparent 100%);
    border-radius: 6px 6px 0 0;
}

/* 基准元素 - 金色闪电效果 */
.bar.pivot {
    background: linear-gradient(180deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
    box-shadow: 
        0 0 20px rgba(251, 191, 36, 0.8),
        0 0 40px rgba(251, 191, 36, 0.4);
    transform: scaleX(1.1);
    z-index: 20;
}

.bar.pivot::after {
    content: '⚡';
    position: absolute;
    top: -30px;
    font-size: 20px;
    animation: lightning 0.5s ease-in-out infinite alternate;
}

@keyframes lightning {
    0% { opacity: 0.6; transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1.1); }
}

/* 左指针指向的元素 */
.bar.left-pointer {
    box-shadow: 
        0 0 15px rgba(59, 130, 246, 0.8),
        0 0 30px rgba(59, 130, 246, 0.4);
    border: 2px solid #3b82f6;
}

.bar.left-pointer::after {
    content: '◀';
    position: absolute;
    bottom: -35px;
    color: #3b82f6;
    font-size: 16px;
    animation: pointerBounce 0.6s ease-in-out infinite;
}

/* 右指针指向的元素 */
.bar.right-pointer {
    box-shadow: 
        0 0 15px rgba(239, 68, 68, 0.8),
        0 0 30px rgba(239, 68, 68, 0.4);
    border: 2px solid #ef4444;
}

.bar.right-pointer::after {
    content: '▶';
    position: absolute;
    bottom: -35px;
    color: #ef4444;
    font-size: 16px;
    animation: pointerBounce 0.6s ease-in-out infinite;
}

@keyframes pointerBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* 比较中的元素 */
.bar.comparing {
    transform: scaleY(1.05);
    box-shadow: 
        0 0 20px rgba(255, 255, 255, 0.6),
        0 0 40px rgba(255, 255, 255, 0.3);
}

/* 交换中的元素 */
.bar.swapping {
    background: linear-gradient(180deg, #ec4899 0%, #db2777 100%);
    box-shadow: 
        0 0 25px rgba(236, 72, 153, 0.9),
        0 0 50px rgba(236, 72, 153, 0.5);
}

/* 在当前分区内 */
.bar.in-partition {
    opacity: 1;
}

/* 不在当前分区内 */
.bar.out-of-partition {
    opacity: 0.3;
    filter: grayscale(0.5);
}

/* 已排序（基准已就位） */
.bar.sorted {
    background: linear-gradient(180deg, #22c55e 0%, #16a34a 100%);
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.5);
}

/* 交换动画 */
.bar.move-right {
    animation: swapRight 0.4s ease-in-out forwards;
}

.bar.move-left {
    animation: swapLeft 0.4s ease-in-out forwards;
}

@keyframes swapRight {
    0% { transform: translateX(0); }
    50% { transform: translateX(28px) translateY(-15px) scale(1.05); }
    100% { transform: translateX(56px); }
}

@keyframes swapLeft {
    0% { transform: translateX(0); }
    50% { transform: translateX(-28px) translateY(15px) scale(0.95); }
    100% { transform: translateX(-56px); }
}

/* ==================== 分区信息 ==================== */
.partition-info {
    margin-bottom: 20px;
    padding: 12px 25px;
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: 10px;
    display: inline-block;
}

#partitionText {
    color: #fbbf24;
    font-size: 0.95rem;
}

/* ==================== 粒子效果 ==================== */
.spark-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #fbbf24;
    border-radius: 50%;
    pointer-events: none;
    animation: sparkFly 0.6s ease-out forwards;
}

@keyframes sparkFly {
    0% { opacity: 1; transform: scale(1); }
    100% { opacity: 0; transform: scale(0) translate(var(--tx), var(--ty)); }
}

/* 基准就位爆炸效果 */
.pivot-explosion {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.6) 0%, transparent 70%);
    pointer-events: none;
    animation: explode 0.5s ease-out forwards;
}

@keyframes explode {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(2); opacity: 0; }
}

/* ==================== 完成动画 ==================== */
.bar.celebrate {
    animation: quickCelebrate 0.5s ease-in-out;
}

@keyframes quickCelebrate {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15) translateY(-8px); }
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .bar {
        width: 40px;
        font-size: 11px;
    }
    
    .pointer-legend {
        flex-wrap: wrap;
        gap: 15px;
    }
}