/* Aligned with rh/style.css theme (dark panel, gradients, accents) */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Roboto+Mono:wght@400;500&display=swap');

:root {
    --bg-color: #0b0f19;
    --panel-bg: #111827;
    --accent-color: #3b82f6;
    --secondary-accent: #8b5cf6;
    --text-color: #f3f4f6;
    --text-muted: #9ca3af;
    --border-color: #1f2937;
    --input-bg: #1f2937;

    --ann-node-bg: #1f2937;
    --ann-node-border: #374151;
    --class-pos: #3b82f6;
    --class-neg: #f97316;
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.45);
}

* {
    box-sizing: border-box;
}

.hidden {
    display: none !important;
}

body.ann-body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    overflow-x: hidden;
}

.mono {
    font-family: 'Roboto Mono', monospace;
}

.ann-shell {
    max-width: 1440px;
    margin: 0 auto;
    padding: 20px 20px 40px;
}

/* Header */
.ann-header {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 24px;
    box-shadow: var(--shadow-card);
    margin-bottom: 16px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    position: sticky;
    top: 12px;
    z-index: 100;
}

.ann-brand {
    flex: 1 1 260px;
    min-width: 0;
}

.ann-brand h1 {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 0 4px;
    background: linear-gradient(to right, var(--accent-color), var(--secondary-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ann-brand .ann-subtitle {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.ann-brand .ann-subtitle a {
    color: var(--accent-color);
    text-decoration: none;
}

.ann-brand .ann-subtitle a:hover {
    text-decoration: underline;
}

.ann-header-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.ann-toolbar-btns {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ann-divider-v {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.stat-block .stat-label {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.stat-block .mono {
    font-size: 1.75rem;
    font-weight: 300;
    letter-spacing: -0.03em;
    color: var(--text-color);
}

.ann-hyperparameters {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 28px;
    justify-content: flex-end;
    flex: 2 1 360px;
}

.control-group label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}

.control-group select {
    width: 100%;
    min-width: 118px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    padding: 8px 10px;
    font-size: 0.875rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.control-group select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.ann-secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.ann-secondary-btn:hover {
    background: #374151;
    border-color: #4b5563;
}

.ann-secondary-btn:active {
    transform: scale(0.95);
}

.ann-play-btn {
    width: 56px;
    height: 56px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: linear-gradient(to bottom right, var(--accent-color), var(--secondary-accent));
    color: white;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
    transition: transform 0.1s, opacity 0.2s;
}

.ann-play-btn:hover {
    opacity: 0.92;
}

.ann-play-btn:active {
    transform: scale(0.96);
}

.ann-secondary-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.ann-play-btn svg {
    width: 26px;
    height: 26px;
    stroke: #fff;
}

.ann-micro-btn svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
}

/* Main grid — TF Playground-like columns */
.ann-layout {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(240px, 2.2fr) minmax(0, 1.25fr);
    gap: 20px;
    min-height: calc(100vh - 200px);
    align-items: start;
}

/*
 * Edges sit above Inputs / Network panels (opaque cards) but below Data / Output
 * columns so sliders and canvases stay usable. SVG root ignores pointer hits so
 * neurons and ± buttons underneath still receive hover/click; only .edge-hit
 * paths capture strokes (see drawNetwork).
 */
#networkSvg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 24;
    pointer-events: none;
}

#networkSvg .weight-path {
    pointer-events: none;
}

#networkSvg .edge-hit {
    pointer-events: stroke;
}

/* Data + Output panels above SVG so controls are never masked */
#colData,
#colResult {
    position: relative;
    z-index: 30;
}

/* Layers above SVG for neuron clicks; transparent pass-through elsewhere */
#featuresCol,
#networkCol {
    position: relative;
    z-index: 18;
    pointer-events: none;
}

#featuresCol #featureList > * {
    pointer-events: none;
}

#featuresCol .ann-section-title,
#featuresCol .ann-lead {
    pointer-events: none;
}

#networkCol #layerContainer {
    pointer-events: none;
}

#networkCol #layerContainer > div {
    pointer-events: none;
}

#networkCol > .ann-layer-toolbar {
    pointer-events: none;
}

#networkCol > .ann-layer-toolbar button {
    pointer-events: auto;
}

#featuresCol .node-box,
#featuresCol .node-box *,
#featuresCol #featureList > * > span,
#networkCol #layerContainer .node-box,
#networkCol #layerContainer .node-box *,
#networkCol button {
    pointer-events: auto;
}

.node-box {
    width: 34px;
    height: 34px;
    border: 1px solid var(--ann-node-border);
    background: var(--ann-node-bg);
    position: relative;
    cursor: pointer;
    overflow: hidden;
    border-radius: 6px;
    transition: transform 0.1s, outline 0.12s;
}

.node-box:hover {
    transform: scale(1.08);
    z-index: 50;
}

.node-canvas {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    border-radius: 4px;
}

.node-focused {
    outline: 3px solid #fbbf24;
    outline-offset: 2px;
    z-index: 5;
}

.dataset-thumbnail {
    width: 44px;
    height: 44px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    padding: 2px;
    border-radius: 8px;
    transition: border-color 0.2s, background 0.2s;
    background: var(--input-bg);
}

.dataset-thumbnail:hover {
    border-color: var(--text-muted);
}

.dataset-thumbnail.active {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.12);
}

.ann-picker-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 28px;
}

.feat-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.feat-active {
    box-shadow: 0 0 0 2px var(--accent-color);
    opacity: 1;
}

.feat-inactive {
    opacity: 0.4;
}

.feat-label-btn {
    font-size: 0.75rem;
    cursor: pointer;
    color: var(--text-muted);
    user-select: none;
}

.feat-label-btn-strong {
    color: var(--text-color);
    font-weight: 600;
}

.ann-stack {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.ann-stack label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.ann-stack input[type='range'] {
    width: 100%;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.mono-inline {
    float: right;
    color: var(--text-color);
    font-family: 'Roboto Mono', monospace;
}

.ann-layer-toolbar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.ann-micro-btn {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    cursor: pointer;
    color: var(--text-color);
    font-size: 0.875rem;
    transition: background 0.15s;
}

.ann-micro-btn:hover {
    background: #374151;
}

.toolbar-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-muted);
}

.layer-stack {
    display: flex;
    flex-direction: column;
    gap: 18px;
    justify-content: center;
    flex: 1;
}

.layer-title {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-align: center;
}

.layer-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 22px;
    flex: 1;
}

.layer-neurons {
    display: flex;
    flex-direction: column;
    gap: 18px;
    justify-content: center;
    flex: 1;
    width: 100%;
}

.ann-grow {
    flex: 1;
    width: 100%;
}

#layerContainer {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: flex-start;
    padding: 0 8px;
    min-height: 500px;
}

.neuron-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 10px;
}

/* Panels — rh .card style */
.ann-front {
    position: relative;
    z-index: 20;
}

.ann-panel {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 22px 20px;
    box-shadow: var(--shadow-card);
}

.ann-section-title {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0 0 8px;
}

.ann-lead {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin: 0 0 20px;
}

.ann-muted {
    color: var(--text-muted);
}

.ann-loss-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.loss-tile {
    padding: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.loss-tile .loss-label {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.loss-tile .mono {
    font-size: 1.125rem;
    color: var(--text-color);
}

.output-canvas-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #0d111c;
}

.ann-checkbox-list {
    margin-top: 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ann-checkbox-list label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8125rem;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
}

.ann-checkbox-list input[type='checkbox'] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.legend-block {
    margin-top: 24px;
    padding-top: 22px;
    border-top: 1px solid var(--border-color);
}

.legend-strip {
    height: 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: linear-gradient(to right, var(--class-neg), #94a3b8, var(--class-pos));
}

.legend-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.625rem;
    color: var(--text-muted);
    margin-top: 8px;
    font-family: 'Roboto Mono', monospace;
}

.ann-edge-panel {
    margin-bottom: 16px;
    padding: 12px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.35);
    border-radius: 10px;
}

.ann-edge-panel .panel-h {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--secondary-accent);
    margin-bottom: 8px;
}

.edge-weight-field {
    width: 100%;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.8125rem;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-color);
}

.edge-meta {
    font-size: 0.625rem;
    color: var(--text-muted);
    margin: 8px 0 0;
}

.primary-block-btn {
    width: 100%;
    padding: 12px;
    margin-top: 4px;
    border: none;
    border-radius: 10px;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    background: linear-gradient(to bottom right, var(--accent-color), var(--secondary-accent));
    color: white;
    transition: opacity 0.2s;
}

.primary-block-btn:hover {
    opacity: 0.92;
}

.ann-output-hint {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin: 0 0 14px;
    min-height: 2.75rem;
    line-height: 1.45;
}

.footer {
    text-align: center;
    margin-top: 48px;
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.weight-path {
    fill: none;
    transition: stroke-width 0.12s, stroke 0.12s, opacity 0.12s;
}

.output-canvas-wrap canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.edge-hit {
    cursor: pointer;
}