/* Robot Builder & Control System - Main Styles */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-panel: #1a2332;
    --bg-card: #1f2d3d;
    --accent: #00d4ff;
    --accent-hover: #00b8e6;
    --accent-dim: rgba(0, 212, 255, 0.1);
    --text-primary: #e8edf3;
    --text-secondary: #8899aa;
    --success: #00ff88;
    --warning: #ffaa00;
    --danger: #ff4466;
    --motor-color: #ff6b35;
    --sensor-color: #00d4ff;
    --controller-color: #aa66ff;
    --border: #2a3a4a;
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
#header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

#header h1 {
    font-size: 18px;
    color: var(--accent);
    font-weight: 600;
}

.header-controls {
    display: flex;
    gap: 4px;
}

.tab-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.tab-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

/* Size Config */
.size-btn {
    background: rgba(0, 212, 255, 0.1) !important;
    border-color: var(--accent) !important;
    color: var(--accent) !important;
    font-weight: 700;
}

.size-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.size-preset-btn {
    padding: 8px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.size-preset-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.size-preset-btn.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 700;
}

.size-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
}

.size-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    font-size: 13px;
    background: var(--bg-primary);
    border-radius: 4px;
}

.size-row span {
    color: var(--text-secondary);
}

.size-row strong {
    color: var(--text-primary);
}

.reset-header-btn {
    background: rgba(255, 68, 102, 0.15) !important;
    border-color: var(--danger) !important;
    color: var(--danger) !important;
    font-weight: 700;
}

.reset-header-btn:hover {
    background: rgba(255, 68, 102, 0.3) !important;
}

.lang-btn {
    background: var(--accent) !important;
    color: var(--bg-primary) !important;
    font-weight: 700;
    min-width: 60px;
    border-color: var(--accent) !important;
}

.lang-btn:hover {
    background: var(--accent-hover) !important;
}

/* Main Layout */
#main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Left Panel - Parts Library */
#parts-panel {
    width: 290px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px;
}

#parts-panel h2 {
    font-size: 15px;
    margin-bottom: 16px;
    color: var(--accent);
}

.parts-category {
    margin-bottom: 20px;
}

.parts-category h3 {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border);
}

.part-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    margin-bottom: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: grab;
    transition: all 0.2s;
    font-size: 13px;
}

.part-item:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.part-item:active {
    cursor: grabbing;
}

.part-icon {
    font-size: 20px;
    width: 30px;
    text-align: center;
}

[data-type="motor"] .part-icon { color: var(--motor-color); }
[data-type="sensor"] .part-icon { color: var(--sensor-color); }
[data-type="controller"] .part-icon { color: var(--controller-color); }

.part-info strong {
    display: block;
    font-size: 12px;
}

.part-info small {
    color: var(--text-secondary);
    font-size: 11px;
}

/* Center - Robot View */
#robot-view {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
}

.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

#tab-simulate {
    overflow: hidden;
}

#canvas-container {
    flex: 1;
    position: relative;
}

#robot-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

#joint-info-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    font-size: 13px;
}

#selected-joint-name {
    color: var(--accent);
    font-weight: 600;
}

/* Right Panel - Details */
#details-panel {
    width: 300px;
    background: var(--bg-panel);
    border-left: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px;
}

#details-panel h2 {
    font-size: 15px;
    margin-bottom: 16px;
    color: var(--accent);
}

#details-panel h3 {
    font-size: 13px;
    margin: 16px 0 8px;
    color: var(--text-secondary);
}

.placeholder-text {
    color: var(--text-secondary);
    font-size: 13px;
    text-align: center;
    padding: 40px 20px;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

.spec-row label {
    color: var(--text-secondary);
}

/* Control Panel */
#control-panel, #ai-panel, #logs-panel, #comm-panel {
    padding: 20px;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

#control-panel h2, #ai-panel h2, #logs-panel h2, #comm-panel h2 {
    color: var(--accent);
    margin-bottom: 20px;
    font-size: 20px;
}

#joint-controls-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.joint-control-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
}

.joint-control-card h4 {
    font-size: 13px;
    margin-bottom: 8px;
    color: var(--accent);
}

.joint-slider {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    font-size: 12px;
}

.joint-slider label {
    width: 20px;
    color: var(--text-secondary);
}

.joint-slider input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}

.joint-slider .value {
    width: 40px;
    text-align: right;
    font-family: monospace;
    font-size: 11px;
}

.control-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.control-actions button, .config-section button {
    padding: 10px 20px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: background 0.2s;
}

.control-actions button:hover, .config-section button:hover {
    background: var(--accent-hover);
}

/* Config Sections */
.config-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}

.config-section h3 {
    font-size: 15px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 13px;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

/* Growth Stats */
#growth-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.stat-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Log Entries */
.log-entry {
    background: var(--bg-primary);
    border-left: 3px solid var(--accent);
    padding: 10px 14px;
    margin-bottom: 8px;
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 13px;
}

.log-entry .log-time {
    font-size: 11px;
    color: var(--text-secondary);
}

.log-entry .log-type {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}

.log-type.md { background: #2d4a3e; color: var(--success); }
.log-type.db { background: #4a3a2d; color: var(--warning); }
.log-type.ai { background: #3a2d4a; color: var(--controller-color); }

/* Connection Status */
.status-connected {
    color: var(--success);
    padding: 8px;
    font-weight: 600;
    font-size: 13px;
}

.status-disconnected {
    color: var(--danger);
    padding: 8px;
    font-weight: 600;
    font-size: 13px;
}

/* Data Stream */
#data-stream {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    height: 300px;
    overflow-y: auto;
}

#stream-output {
    padding: 12px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    color: var(--success);
    line-height: 1.6;
}

/* Knowledge Tree */
.knowledge-node {
    padding: 8px 12px;
    margin: 4px 0;
    background: var(--bg-primary);
    border-radius: var(--radius);
    font-size: 13px;
    border: 1px solid var(--border);
}

.knowledge-node .progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 6px;
    overflow: hidden;
}

.knowledge-node .progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.5s;
}

/* Pose Timeline */
#pose-timeline {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}

#pose-timeline h3 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.pose-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    background: var(--bg-primary);
    border-radius: var(--radius);
    margin-bottom: 6px;
    font-size: 13px;
}

.pose-item .pose-num {
    width: 28px;
    height: 28px;
    background: var(--accent-dim);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-weight: 700;
    font-size: 12px;
}

/* Assigned Part Badge */
.assigned-part {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 4px;
    font-size: 12px;
}

.assigned-part .remove-part {
    color: var(--danger);
    cursor: pointer;
    font-size: 16px;
    border: none;
    background: none;
    padding: 0 4px;
}

/* Robot joint highlight */
.joint-highlight {
    position: absolute;
    pointer-events: none;
    border: 2px solid var(--accent);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ===== Joint List & Filter ===== */
#joint-region-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.region-filter-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.region-filter-btn:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.region-filter-btn.active {
    border-color: var(--accent);
    background: var(--accent-dim);
    box-shadow: 0 0 6px rgba(0,212,255,0.2);
}

#joint-list-container {
    max-height: 280px;
    overflow-y: auto;
    margin-bottom: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-primary);
}

.joint-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 12px;
    border-bottom: 1px solid rgba(42,58,74,0.4);
    transition: all 0.12s;
}

.joint-list-item:last-child {
    border-bottom: none;
}

.joint-list-item:hover {
    background: var(--accent-dim);
}

.joint-list-item.selected {
    background: rgba(0,212,255,0.15);
    border-left: 3px solid var(--accent);
}

.joint-list-item.has-parts .joint-list-name {
    color: var(--text-primary);
}

.joint-list-name {
    color: var(--text-secondary);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.joint-list-badges {
    display: flex;
    gap: 3px;
    flex-shrink: 0;
}

.jl-badge {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    font-size: 9px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.motor-badge {
    background: rgba(255,107,53,0.2);
    color: var(--motor-color);
}

.sensor-badge {
    background: rgba(0,212,255,0.2);
    color: var(--sensor-color);
}

.ctrl-badge {
    background: rgba(170,102,255,0.2);
    color: var(--controller-color);
}

.empty-badge {
    background: transparent;
    color: var(--border);
}

#joint-detail-section {
    border-top: 1px solid var(--border);
    padding-top: 8px;
}

/* ===== Parts Recommendation ===== */
.rec-section {
    margin-top: 12px;
}

.rec-section h3 {
    font-size: 13px;
    color: var(--success);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

.rec-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px;
    margin-bottom: 8px;
}

.rec-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.rec-cat-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    white-space: nowrap;
}

.rec-reason {
    font-size: 11px;
    color: var(--text-secondary);
}

.rec-product-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.rec-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 6px;
}

.rec-specs span {
    font-size: 10px;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
}

.rec-note {
    font-size: 11px;
    color: var(--accent);
    line-height: 1.5;
    margin-bottom: 8px;
    padding: 6px 8px;
    background: var(--accent-dim);
    border-radius: 6px;
}

.rec-price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.rec-price {
    font-size: 14px;
    font-weight: 700;
    color: var(--warning);
}

.rec-search-btn {
    padding: 4px 12px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.rec-search-btn:hover {
    background: var(--accent-hover);
}

.rec-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    margin-top: 4px;
    background: var(--bg-card);
    border: 1px solid var(--success);
    border-radius: var(--radius);
    font-size: 13px;
}

.rec-total span {
    color: var(--text-secondary);
}

.rec-total strong {
    color: var(--success);
    font-size: 15px;
}

/* AI Status */
#ai-status {
    margin-top: 10px;
    padding: 8px;
    border-radius: var(--radius);
    font-size: 13px;
}

/* ===== Assembly Guide ===== */
.assembly-header h2 {
    font-size: 18px;
    color: var(--accent);
    margin-bottom: 12px;
}

.assembly-subtitle {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 16px;
    text-align: center;
}

.total-progress {
    margin-bottom: 12px;
}

.progress-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.progress-bar-large {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill-large {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: 4px;
    transition: width 0.5s;
}

/* Region Grid */
.region-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.region-card {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.region-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.region-card.active {
    box-shadow: 0 0 12px rgba(0,212,255,0.3);
}

.region-card.complete {
    background: rgba(0, 255, 136, 0.08);
}

.region-icon {
    font-size: 28px;
    margin-bottom: 4px;
}

.region-name {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 6px;
}

.region-progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 4px;
}

.region-progress-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.5s;
}

.region-progress-text {
    font-size: 11px;
    color: var(--text-secondary);
}

/* Step Guide */
.step-guide {
    padding: 0;
}

.step-guide h2 {
    font-size: 16px;
    margin-bottom: 12px;
}

.back-btn {
    display: block;
    width: 100%;
    padding: 8px;
    margin-bottom: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.back-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.step-counter {
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.step-progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 16px;
}

.step-progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}

.step-card {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    text-align: center;
    transition: all 0.3s;
}

.step-card.step-done {
    border-color: var(--success);
    background: rgba(0, 255, 136, 0.05);
}

.step-joint-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 10px;
}

.step-part-badge {
    display: inline-block;
    padding: 4px 14px;
    border: 1px solid;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
}

.step-description {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding: 0 4px;
}

.step-install-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.step-install-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: scale(1.02);
}

.step-install-btn.installed {
    background: var(--success);
    cursor: default;
}

.step-install-btn:disabled {
    opacity: 0.8;
}

/* Step Navigation */
.step-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 12px;
}

.step-nav button {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.step-nav button:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.step-nav button:disabled {
    opacity: 0.3;
    cursor: default;
}

.step-dots {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
}

.step-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: all 0.2s;
}

.step-dot.current {
    background: var(--accent);
    transform: scale(1.3);
}

.step-dot.done {
    background: var(--success);
}

.auto-install-all-btn {
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px dashed var(--text-secondary);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.auto-install-all-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Mode Toggle */
.mode-toggle {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
}

.mode-btn {
    flex: 1;
    padding: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.2s;
}

.mode-btn.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.mode-btn:hover {
    border-color: var(--accent);
}

/* Core Parts Tab */
.core-btn {
    background: rgba(255, 170, 0, 0.1) !important;
    border-color: var(--warning) !important;
    color: var(--warning) !important;
}

.core-item {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.core-item:hover {
    border-color: var(--accent);
}

.core-item.purchased {
    border-color: var(--success);
    background: rgba(0,255,136,0.03);
}

.core-item-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.core-check {
    font-size: 16px;
}

.core-item-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}

.core-badge {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 700;
}

.core-badge.required {
    background: rgba(255,68,102,0.15);
    color: var(--danger);
}

.core-badge.optional {
    background: rgba(136,153,170,0.15);
    color: var(--text-secondary);
}

.core-item-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 6px;
}

.core-alt, .core-note {
    font-size: 11px;
    color: var(--accent);
    margin-bottom: 4px;
}

.core-item-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 6px;
}

.core-price {
    font-size: 14px;
    font-weight: 700;
    color: var(--warning);
}

/* Wiring Guide */
.phase-btn {
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
    white-space: nowrap;
}

.phase-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.phase-btn.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.wiring-diagram {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
    overflow-x: auto;
}

.wiring-diagram pre {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    color: var(--success);
    line-height: 1.4;
    white-space: pre;
}

.wiring-step {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px;
    margin-bottom: 4px;
    border-left: 3px solid var(--accent);
    background: var(--bg-primary);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.wiring-step-num {
    width: 24px;
    height: 24px;
    background: var(--accent-dim);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    flex-shrink: 0;
}

.wiring-step-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.wiring-step-text {
    font-size: 13px;
    line-height: 1.5;
}

/* ===== Virtual Robot Simulator ===== */
#sim-subtabs {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sim-subtab {
    padding: 6px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.2s;
}

.sim-subtab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.sim-subtab.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

#tab-simulate.active {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#sim-viewport {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

#sim-3d-container {
    flex: 1;
    position: relative;
    min-height: 300px;
}

#sim-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

#sim-sidebar {
    width: 300px;
    background: var(--bg-panel);
    border-left: 1px solid var(--border);
    padding: 12px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

#sim-sidebar h3 {
    font-size: 15px;
    color: var(--accent);
    margin-bottom: 12px;
}

#sim-sidebar h4 {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 12px 0 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sim-test-buttons {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sim-btn {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    text-align: left;
    transition: all 0.2s;
}

.sim-btn:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.alltest-btn {
    background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(170,102,255,0.15)) !important;
    border-color: var(--accent) !important;
    color: var(--accent) !important;
    font-size: 14px !important;
    padding: 12px 14px !important;
}
.alltest-btn:hover {
    background: linear-gradient(135deg, rgba(0,212,255,0.25), rgba(170,102,255,0.25)) !important;
    border-color: var(--success) !important;
}
.walk-btn:hover { border-color: var(--success); }
.balance-btn:hover { border-color: var(--warning); }
.grasp-btn:hover { border-color: var(--motor-color); }
.full-btn:hover { border-color: var(--controller-color); }
.reset-btn { color: var(--text-secondary); font-size: 12px; padding: 6px 14px; }

.sensor-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 8px;
    font-size: 11px;
    font-family: 'Consolas', monospace;
    color: var(--success);
    background: var(--bg-primary);
    border-radius: 4px;
    margin-bottom: 3px;
}

.sensor-row span:first-child {
    color: var(--text-secondary);
}

#sim-log {
    flex: 1;
    min-height: 150px;
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px;
}

.sim-log-entry {
    font-size: 11px;
    font-family: 'Consolas', monospace;
    color: var(--text-primary);
    padding: 2px 0;
    line-height: 1.5;
}

.sim-log-time {
    color: var(--text-secondary);
    margin-right: 6px;
}

/* ===== Save/Load ===== */
.save-btn {
    background: rgba(0, 255, 136, 0.1) !important;
    border-color: var(--success) !important;
    color: var(--success) !important;
}

.save-item {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    margin-bottom: 10px;
    transition: border-color 0.2s;
}

.save-item:hover {
    border-color: var(--accent);
}

.save-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.save-item-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.save-item-date {
    font-size: 11px;
    color: var(--text-secondary);
}

.save-item-stats {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.save-progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 10px;
}

.save-progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}

.save-item-actions {
    display: flex;
    gap: 6px;
}

.save-action-btn {
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.save-action-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.save-action-btn.load-btn {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    font-weight: 700;
}

.save-action-btn.load-btn:hover {
    background: var(--accent-hover);
}

.save-action-btn.del-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* ===== Community ===== */
.community-btn {
    background: rgba(170, 102, 255, 0.1) !important;
    border-color: var(--controller-color) !important;
    color: var(--controller-color) !important;
    font-weight: 700;
}

.comm-cat-btn {
    padding: 6px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.comm-cat-btn:hover { border-color: var(--controller-color); color: var(--controller-color); }
.comm-cat-btn.active { background: rgba(170,102,255,0.15); border-color: var(--controller-color); color: var(--controller-color); font-weight: 700; }

.comm-post-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.comm-post-item:hover { border-color: var(--controller-color); background: rgba(170,102,255,0.03); }
.comm-post-icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }

.comm-post-body { flex: 1; min-width: 0; }
.comm-post-title { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.comm-post-meta { display: flex; gap: 12px; font-size: 11px; color: var(--text-secondary); flex-wrap: wrap; }

.comm-content { font-size: 14px; line-height: 1.8; color: var(--text-primary); white-space: pre-wrap; }

.comm-comment {
    padding: 10px 12px;
    background: var(--bg-primary);
    border-radius: var(--radius);
    margin-bottom: 6px;
}

.comm-comment-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.comm-page-btn {
    width: 32px; height: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
}

.comm-page-btn:hover { border-color: var(--accent); color: var(--accent); }
.comm-page-btn.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); font-weight: 700; }

.code-block {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    color: var(--success);
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre;
}