/* ========================================
   Decision Tree Visualization Styles
   ======================================== */

/* Tree Node Base */
.tree-node {
    cursor: pointer;
    transition: all var(--transition-base);
}

.tree-node:hover .node-circle {
    filter: brightness(1.15);
    transform: scale(1.08);
}

.node-circle {
    transition: all var(--transition-base);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.12));
}

.node-circle.goal {
    fill: var(--color-node-goal);
}

.node-circle.option {
    fill: var(--color-node-option);
}

.node-circle.priority {
    fill: var(--color-node-priority);
}

.node-circle.assumption {
    fill: var(--color-node-assumption);
}

.node-circle.confidence {
    fill: var(--color-node-confidence);
}

.node-circle.risk {
    fill: var(--color-node-risk);
}

/* Node Glow Effect based on Health */
.node-circle.glow-healthy {
    filter: drop-shadow(0 0 8px var(--color-healthy));
}

.node-circle.glow-warning {
    filter: drop-shadow(0 0 8px var(--color-warning));
}

.node-circle.glow-danger {
    filter: drop-shadow(0 0 8px var(--color-danger));
}

/* Node Label */
.node-label {
    fill: var(--color-text-primary);
    font-size: 12px;
    font-weight: var(--font-weight-medium);
    text-anchor: middle;
    pointer-events: none;
    user-select: none;
}

.node-sublabel {
    fill: var(--color-text-muted);
    font-size: 10px;
    text-anchor: middle;
    pointer-events: none;
    font-weight: var(--font-weight-normal);
}

/* Node Type Badge */
.node-type-badge {
    fill: var(--color-bg-primary);
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-anchor: middle;
}

/* Tree Edges */
.tree-edge {
    fill: none;
    stroke: var(--color-text-muted);
    stroke-width: 2;
    stroke-linecap: round;
    opacity: 0.25;
    transition: all var(--transition-base);
}

.tree-edge.active {
    opacity: 0.5;
    stroke-width: 2.5;
}

.tree-edge.highlighted {
    stroke: var(--color-accent-primary);
    opacity: 1;
    stroke-width: 3;
}

/* Animated Edge Drawing */
.tree-edge.animate {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawLine 0.8s ease forwards;
}

@keyframes drawLine {
    to {
        stroke-dashoffset: 0;
    }
}

/* Node Entry Animation */
.tree-node.entering {
    opacity: 0;
    transform: scale(0);
    animation: nodeEnter 0.4s ease forwards;
}

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

/* Node Pulse Effect for New Nodes */
.tree-node.pulse .node-circle {
    animation: nodePulse 0.6s ease;
}

@keyframes nodePulse {
    0%, 100% {
        filter: drop-shadow(0 0 0 transparent);
    }
    50% {
        filter: drop-shadow(0 0 20px currentColor);
    }
}

/* Node Selection */
.tree-node.selected .node-circle {
    stroke: white;
    stroke-width: 3;
}

/* Node Tooltip */
.node-tooltip {
    position: absolute;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 100;
}

.node-tooltip.visible {
    opacity: 1;
}

.node-tooltip-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.node-tooltip-meta {
    color: var(--color-text-muted);
    display: flex;
    gap: var(--spacing-md);
}

/* Confidence Bar in Nodes */
.confidence-bar {
    height: 4px;
    background: var(--color-bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 4px;
}

.confidence-fill {
    height: 100%;
    border-radius: 2px;
    transition: width var(--transition-base);
}

.confidence-fill.high {
    background: var(--color-healthy);
}

.confidence-fill.medium {
    background: var(--color-warning);
}

.confidence-fill.low {
    background: var(--color-danger);
}

/* Node Card (Expanded View) */
.node-card {
    position: absolute;
    width: 280px;
    padding: var(--spacing-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 50;
    opacity: 0;
    transform: translateY(8px);
    transition: all var(--transition-base);
    pointer-events: none;
    backdrop-filter: blur(8px);
}

.node-card.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.node-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.node-card-type {
    padding: 2px 8px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    color: white;
}

.node-card-type.goal { background: var(--color-node-goal); }
.node-card-type.option { background: var(--color-node-option); }
.node-card-type.priority { background: var(--color-node-priority); }
.node-card-type.assumption { background: var(--color-node-assumption); }
.node-card-type.confidence { background: var(--color-node-confidence); }
.node-card-type.risk { background: var(--color-node-risk); }

.node-card-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.3;
}

.node-card-body {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.node-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 10px;
    color: var(--color-text-muted);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

/* Risk Indicator */
.risk-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: var(--color-danger-bg);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 500;
    color: var(--color-danger);
}

/* Assumption Validity */
.validity-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
}

.validity-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.validity-dot.valid {
    background: var(--color-healthy);
}

.validity-dot.invalid {
    background: var(--color-danger);
}

.validity-dot.uncertain {
    background: var(--color-warning);
}

/* Tree Zoom Controls */
.zoom-controls {
    position: absolute;
    bottom: 60px;
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    z-index: 10;
}

/* Mini Map (Optional) */
.tree-minimap {
    position: absolute;
    bottom: 60px;
    left: var(--spacing-lg);
    width: 150px;
    height: 100px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    z-index: 10;
}

.minimap-viewport {
    position: absolute;
    border: 2px solid var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.1);
    pointer-events: none;
}