/* Neural Network — forward & backward visualization */

/* Phase indicator */
.phase-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #2a2a4a;
    border: 1px solid #444;
    border-radius: 8px;
    margin-bottom: 18px;
}
.phase-badge {
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    background: #1a1a2e;
    border: 1px solid #555;
    color: #aaa;
}
.phase-badge.forward { background: #1a2a3a; border-color: #00d9ff; color: #00d9ff; }
.phase-badge.loss { background: #3a2a1a; border-color: #ffd700; color: #ffd700; }
.phase-badge.backward { background: #2a1a2a; border-color: #ff79c6; color: #ff79c6; }
.phase-badge.done { background: #1a3a2a; border-color: #00ff88; color: #00ff88; }
.phase-desc { color: #bbb; font-size: 14px; }

/* Network SVG */
.network-wrapper {
    background: #11132e;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 16px;
    border: 1px solid #2a2a4a;
    overflow-x: auto;
}
#networkSvg { width: 100%; height: 360px; display: block; }

/* Nodes */
.net-node { stroke-width: 2.5; }
.net-node.input { fill: #1e2a4a; stroke: #5b8def; }
.net-node.hidden { fill: #1a2a3a; stroke: #00d9ff; }
.net-node.output { fill: #1a2a2a; stroke: #ff79c6; }
.net-node.active { filter: drop-shadow(0 0 8px currentColor); stroke-width: 3.5; }
.net-label { font-family: 'Courier New', monospace; font-size: 13px; font-weight: 700; text-anchor: middle; dominant-baseline: central; fill: #fff; }
.net-sublabel { font-family: 'Courier New', monospace; font-size: 10px; fill: #aaa; text-anchor: middle; }

/* Edges */
.net-edge { stroke-width: 2.2; fill: none; opacity: 0.9; transition: all 0.3s; }
.net-edge.dim { opacity: 0.25; stroke-width: 1.5; }
.net-edge.highlight { stroke-width: 4; filter: drop-shadow(0 0 6px currentColor); opacity: 1; }
.net-edge.forward { stroke: #00d9ff; }
.net-edge.backward { stroke: #ff79c6; }
.net-edge.loss { stroke: #ffd700; }
.net-weight { font-family: 'Courier New', monospace; font-size: 12px; font-weight: 700; text-anchor: middle; paint-order: stroke; stroke: #11132e; stroke-width: 3px; }
.net-weight.forward { fill: #00d9ff; }
.net-weight.backward { fill: #ff79c6; }
.net-weight.loss { fill: #ffd700; }

/* Formula display */
.formula-display {
    text-align: center;
    padding: 14px;
    background: #2a2a4a;
    border-radius: 8px;
    margin: 14px 0 16px;
    font-size: 15px;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}
.formula-label { color: #888; }
.formula-content { font-family: 'Courier New', monospace; color: #fff; }
.formula-content .hl { color: #00d9ff; font-weight: 700; }
.formula-content .hl2 { color: #ff79c6; font-weight: 700; }
.formula-content .hl3 { color: #ffd700; font-weight: 700; }
.formula-content .muted { color: #888; }

/* Values grid */
.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}
.value-card {
    background: #1e1e3f;
    border: 1px solid #2a2a4a;
    border-radius: 8px;
    padding: 12px;
    transition: all 0.25s;
}
.value-card.active { border-color: #00d9ff; background: #1a2a3a; box-shadow: 0 0 14px rgba(0,217,255,0.2); }
.value-card.backward-active { border-color: #ff79c6; background: #2a1a2a; box-shadow: 0 0 14px rgba(255,121,198,0.2); }
.value-card.highlight-card.active { border-color: #ffd700; background: #2a2a1a; }
.value-card.loss-card.active { border-color: #ffd700; background: #3a2a1a; }
.value-label { color: #888; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.value-num { font-family: 'Courier New', monospace; font-size: 22px; font-weight: 700; color: #fff; }
.value-num.small { font-size: 16px; }
.value-sub { font-family: 'Courier New', monospace; font-size: 11px; color: #666; margin-top: 4px; }

@media (max-width: 900px) {
    .values-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Grad table */
.grad-table-wrapper { margin: 10px 0 16px; overflow-x: auto; }
.grad-table { width: 100%; border-collapse: collapse; font-family: 'Courier New', monospace; font-size: 13px; }
.grad-table th { background: #2a2a4a; color: #00d9ff; padding: 8px; text-align: left; border: 1px solid #444; font-size: 11px; text-transform: uppercase; }
.grad-table td { padding: 7px 8px; border: 1px solid #333; background: #1e1e3f; color: #ddd; }
.grad-table tr.highlight td { background: #1a2a3a; color: #fff; }
.grad-table tr.backward-hl td { background: #2a1a2a; }
.grad-table .pos { color: #00ff88; }
.grad-table .neg { color: #ff6b6b; }
.grad-table .wname { color: #00d9ff; font-weight: 700; }

/* Info panel tweaks */
.info-panel { grid-template-columns: repeat(4, 1fr); }
.legend-color.forward { border-color: #00d9ff; background: #1a2a3a; }
.legend-color.activation { border-color: #bd93f9; background: #2a1a3a; }
.legend-color.loss { border-color: #ffd700; background: #3a2a1a; }
.legend-color.backward { border-color: #ff79c6; background: #2a1a2a; }

.analogy-box {
    margin-top: 16px;
    padding: 12px 14px;
    background: linear-gradient(135deg, rgba(0,217,255,0.08), rgba(255,121,198,0.08));
    border: 1px solid #2a2a4a;
    border-radius: 8px;
    color: #b8b8d0;
    font-size: 13px;
    line-height: 1.6;
}
.analogy-box strong { color: #ffd700; }

@media (max-width: 768px) {
    .info-panel { grid-template-columns: repeat(2, 1fr); }
    #networkSvg { height: 300px; }
}