:root {
    --bg-dark: rgba(20, 22, 28, 0.95);
    --bg-panel: rgba(30, 32, 40, 0.95);
    --bg-hover: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.12);
    --text: #c8c8c8;
    --text-dim: #888;
    --text-muted: #666;
    --accent: #4a9eff;
    --accent-hover: #6ab0ff;
    --danger: #ff6b6b;
    --success: #51cf66;
    --cyan: #00CED1;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #0a0a0f;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 13px;
    color: var(--text);
    overflow: hidden;
}

#canvas {
    display: block;
    cursor: crosshair;
}

/* Tool Palette - Redesigned */
#tool-palette {
    position: fixed;
    top: 16px;
    left: 16px;
    width: 220px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0;
    overflow: hidden;
}

/* Tool Tabs */
.tool-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border);
}

.tool-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 8px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.15s;
}

.tool-tab:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.tool-tab.active {
    background: rgba(255, 255, 255, 0.03);
    color: #fff;
    border-bottom-color: var(--tab-color, var(--accent));
}

.tab-icon {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}

.tab-name {
    font-size: 11px;
    font-weight: 500;
}

.tab-key {
    font-size: 9px;
    opacity: 0.5;
    background: rgba(255, 255, 255, 0.1);
    padding: 1px 5px;
    border-radius: 3px;
}

/* Tool Sections */
.tool-section {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
}

.tool-section:last-child {
    border-bottom: none;
}

.section-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
    margin-bottom: 10px;
}

/* Mode Toggle */
.mode-toggle {
    display: flex;
    gap: 8px;
}

.mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 12px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.15s;
}

.mode-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
    color: var(--text);
}

.mode-icon {
    font-size: 16px;
    font-weight: 600;
}

.mode-btn.add.active {
    background: rgba(81, 207, 102, 0.15);
    border-color: var(--success);
    color: var(--success);
}

.mode-btn.remove.active {
    background: rgba(255, 107, 107, 0.15);
    border-color: var(--danger);
    color: var(--danger);
}

/* Slider Rows */
.slider-row {
    display: grid;
    grid-template-columns: 55px 1fr 32px;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.slider-row:last-child {
    margin-bottom: 0;
}

.slider-row label {
    font-size: 12px;
    color: var(--text-dim);
}

.slider-row .value {
    font-size: 12px;
    color: var(--text);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.slider-row .hint {
    grid-column: 2 / -1;
    font-size: 10px;
    color: var(--text-muted);
    margin-top: -6px;
}

.slider-row input[type="range"] {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

.slider-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.slider-row input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Source-specific sliders use cyan accent */
.source-settings input[type="range"]::-webkit-slider-thumb {
    background: var(--cyan);
}

.source-settings input[type="range"]::-moz-range-thumb {
    background: var(--cyan);
}

/* Source Info */
.source-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
}

.source-count {
    font-size: 12px;
    color: var(--text-dim);
}

.clear-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-dim);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
}

.clear-btn:hover {
    background: rgba(255, 107, 107, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

/* Legacy slider group (kept for compatibility) */
.slider-group {
    margin-bottom: 10px;
}

.slider-group label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    margin-bottom: 4px;
    color: var(--text-dim);
}

.slider-group .value {
    color: var(--text);
}

.slider-group .hint {
    font-size: 10px;
    color: var(--text-dim);
    opacity: 0.6;
    margin-top: 2px;
}

.slider-group input[type="range"] {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.slider-group input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Parameter Panel */
#param-panel {
    position: fixed;
    top: 16px;
    right: 16px;
    width: 260px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

/* Status Bar */
#status-bar {
    position: fixed;
    bottom: 16px;
    left: 16px;
    right: 16px;
    background: var(--bg-dark);
    padding: 8px 16px;
    border-radius: 6px;
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

#status-bar .divider {
    color: var(--border);
}

#status-bar .mode.running {
    color: var(--success);
}

#status-bar .mode.paused {
    color: var(--danger);
}

#status-bar .shortcuts {
    margin-left: auto;
    color: var(--text-dim);
    font-size: 11px;
}

/* Initial loading status */
#status {
    position: fixed;
    bottom: 16px;
    left: 16px;
    color: var(--text-dim);
    font-family: monospace;
}

/* Tweakpane overrides */
.tp-dfwv {
    width: 100% !important;
}