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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f0f4f8;
    color: #333;
    height: 100vh;
    overflow: hidden;
}

#app {
    display: flex;
    height: 100vh;
}

/* ---------- Left panel ---------- */
#sidebar {
    width: 280px;
    min-width: 280px;
    background: #f7f9fb;
    border-right: 1px solid #d0d7de;
    padding: 14px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#sidebar h1 {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 2px;
}

#sidebar .subtitle {
    font-size: 10px;
    color: #666;
    margin-bottom: 6px;
}

.group {
    background: #fff;
    border: 1px solid #d0d7de;
    border-radius: 6px;
    padding: 10px 12px;
}

.group h3 {
    font-size: 11px;
    font-weight: 600;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

/* Slider row */
.slider-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}

.slider-row label {
    font-size: 11px;
    width: 72px;
    min-width: 72px;
    color: #444;
}

.slider-row input[type="range"] {
    flex: 1;
    accent-color: #4682b4;
    height: 4px;
}

.slider-row .val {
    font-family: 'Consolas', 'Fira Code', monospace;
    font-size: 11px;
    width: 40px;
    text-align: right;
    color: #2563eb;
}

.slider-row input[type="checkbox"] {
    accent-color: #4682b4;
}

/* Preset buttons */
.presets {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.presets button {
    font-size: 10px;
    padding: 3px 8px;
    border: 1px solid #c0c8d0;
    border-radius: 4px;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: all 0.15s;
}

.presets button:hover {
    background: #e8f0fe;
    border-color: #4682b4;
    color: #1a1a2e;
}

/* Color mode select */
select {
    width: 100%;
    padding: 4px 8px;
    font-size: 11px;
    border: 1px solid #c0c8d0;
    border-radius: 4px;
    background: #fff;
    color: #333;
}

/* Status / metrics */
#metrics {
    font-family: 'Consolas', monospace;
    font-size: 10px;
    line-height: 1.7;
    color: #555;
}

#metrics .value {
    color: #2563eb;
}

#metrics .ok {
    color: #16a34a;
}

/* ---------- Center: 3D canvas ---------- */
#canvas-container {
    flex: 1;
    position: relative;
    background: #fff;
}

#canvas-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* ---------- Right: VAE Diversity chart ---------- */
#diversity-panel {
    width: 480px;
    min-width: 420px;
    border-left: 1px solid #d0d7de;
    background: #fcfcfc;
    display: flex;
    flex-direction: column;
    padding: 12px;
    gap: 6px;
}

#diversity-chart {
    flex: 1;
    min-height: 0;
}

#diversity-status {
    font-size: 11px;
    color: #555;
    text-align: center;
    padding: 4px 6px;
    border-top: 1px solid #e4e8ee;
}

/* ---------- Colorbar (right side, larger) ---------- */
#colorbar-wrapper {
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: stretch;
    gap: 6px;
    height: 320px;
}

#colorbar-title {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-family: 'Segoe UI', sans-serif;
    font-size: 12px;
    font-weight: 500;
    color: #444;
    display: flex;
    align-items: center;
    justify-content: center;
}

#colorbar {
    width: 24px;
    height: 100%;
    border: 1px solid #aaa;
    border-radius: 3px;
    overflow: hidden;
}

#colorbar-gradient {
    width: 100%;
    height: 100%;
}

#colorbar-labels {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-family: 'Consolas', monospace;
    font-size: 11px;
    color: #555;
    padding: 2px 0;
}

/* ---------- Credits ---------- */
.credits {
    font-size: 9px;
    color: #888;
    line-height: 1.5;
    margin-top: auto;
    padding-top: 6px;
    border-top: 1px solid #e0e0e0;
}

.credits a {
    color: #4682b4;
    text-decoration: none;
}