/* Kth Largest Element - Max Heap Visualization Styles */

/* Heap Tree Container */
.heap-wrapper {
    padding: 20px;
    min-height: 250px;
    display: flex;
    justify-content: center;
}

.heap-tree {
    width: 100%;
    max-width: 600px;
    height: 220px;
}

/* Tree Node Styling */
.tree-node {
    cursor: default;
    transition: all 0.3s ease;
}

.tree-node circle {
    fill: #2a2a4a;
    stroke: #444;
    stroke-width: 2;
    transition: all 0.3s ease;
}

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

.tree-node .node-index {
    fill: #666;
    font-size: 10px;
    font-weight: normal;
}

/* Node States */
.tree-node.root circle {
    fill: #3a3a2a;
    stroke: #ffd700;
    stroke-width: 3;
}

.tree-node.current circle {
    fill: #3a2a1a;
    stroke: #ffaa00;
    stroke-width: 3;
    filter: drop-shadow(0 0 8px rgba(255, 170, 0, 0.6));
}

.tree-node.parent circle {
    fill: #1a3a4a;
    stroke: #00d9ff;
    stroke-width: 3;
}

.tree-node.child circle {
    fill: #1a2a4a;
    stroke: #5b8def;
    stroke-width: 3;
}

.tree-node.larger-child circle {
    fill: #1a3a2a;
    stroke: #4ecdc4;
    stroke-width: 3;
}

.tree-node.swapping circle {
    animation: nodeSwap 0.4s ease;
}

@keyframes nodeSwap {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* Tree Edges */
.tree-edge {
    stroke: #444;
    stroke-width: 2;
    fill: none;
    transition: all 0.3s ease;
}

.tree-edge.active {
    stroke: #00d9ff;
    stroke-width: 3;
}

.tree-edge.swapping {
    stroke: #ffaa00;
    stroke-width: 3;
    animation: edgePulse 0.4s ease;
}

@keyframes edgePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Heap Array */
.array-wrapper {
    padding: 15px 20px;
    display: flex;
    justify-content: center;
}

.heap-array {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    justify-content: center;
}

.array-box {
    width: 45px;
    height: 45px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2a2a4a 0%, #1e1e3f 100%);
    border: 2px solid #444;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    color: #fff;
    transition: all 0.3s ease;
    position: relative;
}

.array-box .arr-index {
    position: absolute;
    bottom: -16px;
    font-size: 10px;
    color: #666;
    font-weight: normal;
}

.array-box.root {
    border-color: #ffd700;
    background: linear-gradient(135deg, #3a3a2a 0%, #2a2a1a 100%);
}

.array-box.current {
    border-color: #ffaa00;
    box-shadow: 0 0 10px rgba(255, 170, 0, 0.5);
}

.array-box.parent {
    border-color: #00d9ff;
}

.array-box.child {
    border-color: #5b8def;
}

.array-box.larger-child {
    border-color: #4ecdc4;
}

/* Extracted Elements Section */
.extracted-section {
    margin-top: 20px;
    padding: 15px 20px;
}

.extracted-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    min-height: 50px;
    padding: 10px;
    background: #1e1e3f;
    border-radius: 8px;
}

.extracted-box {
    width: 45px;
    height: 45px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a3a2a 0%, #0a2a1a 100%);
    border: 2px solid #4ecdc4;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    color: #4ecdc4;
    position: relative;
}

.extracted-box .extract-order {
    position: absolute;
    top: -12px;
    font-size: 10px;
    color: #888;
    font-weight: normal;
}

.extracted-box.latest {
    animation: extractPulse 0.5s ease;
    box-shadow: 0 0 12px rgba(78, 205, 196, 0.5);
}

.extracted-box.result {
    border-color: #ffd700;
    color: #ffd700;
    background: linear-gradient(135deg, #3a3a2a 0%, #2a2a1a 100%);
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.4);
}

@keyframes extractPulse {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.empty-message {
    color: #666;
    font-style: italic;
}

/* Info Panel */
.info-panel {
    grid-template-columns: repeat(4, 1fr);
}

.info-box.phase-box h3 {
    color: #ffaa00;
}

.info-box.size-box h3 {
    color: #00d9ff;
}

.info-box.k-box h3 {
    color: #5b8def;
}

.info-box.result-box h3 {
    color: #4ecdc4;
}

.info-desc {
    color: #666;
    font-size: 11px;
    margin-top: 5px;
}

/* Legend Colors */
.legend-color.root-color {
    background: linear-gradient(135deg, #3a3a2a 0%, #2a2a1a 100%);
    border: 2px solid #ffd700;
}

.legend-color.current-color {
    background: linear-gradient(135deg, #3a2a1a 0%, #2a1a0a 100%);
    border: 2px solid #ffaa00;
    box-shadow: 0 0 6px rgba(255, 170, 0, 0.4);
}

.legend-color.parent-color {
    background: linear-gradient(135deg, #1a3a4a 0%, #0a2a3a 100%);
    border: 2px solid #00d9ff;
}

.legend-color.child-color {
    background: linear-gradient(135deg, #1a2a4a 0%, #0a1a3a 100%);
    border: 2px solid #5b8def;
}

.legend-color.extracted-color {
    background: linear-gradient(135deg, #1a3a2a 0%, #0a2a1a 100%);
    border: 2px solid #4ecdc4;
}

/* Responsive */
@media (max-width: 768px) {
    .info-panel {
        grid-template-columns: repeat(2, 1fr);
    }

    .heap-tree {
        height: 180px;
    }

    .array-box, .extracted-box {
        width: 38px;
        height: 38px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .info-panel {
        grid-template-columns: 1fr;
    }

    .heap-tree {
        height: 150px;
    }
}