/**
 * Dijkstra最短路径可视化样式
 * @author changyadai
 */

.container {
    max-width: 900px;
    padding: 25px;
}

.nav-link {
    position: absolute;
    top: 25px;
    left: 25px;
}

/* 图形区域 */
.graph-container {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

#graphSvg {
    width: 100%;
    height: 400px;
    display: block;
}

/* 节点 */
.node {
    cursor: pointer;
    transition: all 0.3s ease;
}

.node circle {
    fill: rgba(255, 255, 255, 0.1);
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 2;
    transition: all 0.3s ease;
}

.node text {
    fill: #fff;
    font-size: 14px;
    font-weight: bold;
    text-anchor: middle;
    dominant-baseline: central;
    pointer-events: none;
}

.node.start circle {
    fill: rgba(34, 197, 94, 0.4);
    stroke: #22c55e;
    stroke-width: 3;
}

.node.current circle {
    fill: rgba(251, 191, 36, 0.5);
    stroke: #fbbf24;
    stroke-width: 3;
    animation: nodePulse 0.5s ease-in-out infinite alternate;
}

@keyframes nodePulse {
    from { r: 25; }
    to { r: 30; }
}

.node.visited circle {
    fill: rgba(249, 115, 22, 0.4);
    stroke: #f97316;
}

.node.finalized circle {
    fill: rgba(34, 197, 94, 0.3);
    stroke: #22c55e;
}

.node:hover circle {
    stroke-width: 4;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
}

/* 边 */
.edge {
    stroke: rgba(255, 255, 255, 0.2);
    stroke-width: 2;
    transition: all 0.3s ease;
}

.edge.considering {
    stroke: #fbbf24;
    stroke-width: 3;
    animation: edgePulse 0.5s ease-in-out infinite alternate;
}

@keyframes edgePulse {
    from { opacity: 0.5; }
    to { opacity: 1; }
}

.edge.path {
    stroke: #22c55e;
    stroke-width: 4;
    filter: drop-shadow(0 0 5px rgba(34, 197, 94, 0.6));
}

.edge.relaxed {
    stroke: #f97316;
    stroke-width: 3;
}

/* 权重标签 */
.weight-label {
    fill: rgba(255, 255, 255, 0.6);
    font-size: 11px;
    text-anchor: middle;
    dominant-baseline: central;
}

.weight-label.highlight {
    fill: #fbbf24;
    font-weight: bold;
}

/* 距离表 */
.distance-table-section {
    margin-bottom: 20px;
}

.section-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
}

.distance-table {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dist-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    min-width: 60px;
    transition: all 0.3s ease;
}

.dist-item.start {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.4);
}

.dist-item.current {
    background: rgba(251, 191, 36, 0.3);
    border: 1px solid #fbbf24;
    transform: scale(1.1);
}

.dist-item.updated {
    animation: distUpdate 0.3s ease-out;
}

@keyframes distUpdate {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); background: rgba(249, 115, 22, 0.4); }
}

.dist-item.finalized {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.dist-node {
    font-weight: bold;
    font-size: 1rem;
    color: #fff;
    margin-bottom: 5px;
}

.dist-value {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: var(--accent-cyan);
}

.dist-value.infinity {
    color: rgba(255, 255, 255, 0.4);
}

/* 路径动画 */
@keyframes pathDraw {
    from { stroke-dashoffset: 1000; }
    to { stroke-dashoffset: 0; }
}

.edge.path-animate {
    stroke-dasharray: 1000;
    animation: pathDraw 1s ease forwards;
}