/**
 * Min-Max Optimization Sandbox - "Midnight Lab" Theme
 * Engineering visualization aesthetic
 */

:root {
    --bg-dark: #121212;
    --panel-dark: #1e1e1e;
    --accent-cyan: #00e5ff;
    --accent-magenta: #ff007f;
    --accent-green: #00ff88;
    --text-main: #e0e0e0;
    --text-dim: #888;
    --border: #333;
}

/* Main wrapper: Sidebar (280px) + Canvas (800px) */
.minmax-sandbox {
    max-width: 880px;
    margin: 20px auto;
    padding: 0;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    background: var(--bg-dark);
    color: var(--text-main);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.minmax-sandbox * {
    box-sizing: border-box;
}

/* App container: sidebar + canvas */
.minmax-sandbox .app-container {
    display: flex;
    min-height: 480px;
}

/* Sidebar: fixed width, don't grow/shrink */
.minmax-sandbox .sidebar {
    width: 280px;
    flex: 0 0 280px;
    background: var(--panel-dark);
    border-right: 1px solid var(--border);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.minmax-sandbox .sidebar h2 {
    margin: 0;
    font-size: 1.1rem;
    letter-spacing: 1px;
    font-weight: 600;
}

.minmax-sandbox .sidebar .highlight {
    color: var(--accent-cyan);
}

.minmax-sandbox .control-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
}

.minmax-sandbox .control-group label {
    flex-shrink: 0;
    font-size: 0.68rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    min-width: 5.2em;
}

.minmax-sandbox .control-group select {
    flex: 1;
    min-width: 0;
    background: #2a2a2a;
    border: 1px solid var(--border);
    color: white;
    padding: 6px 8px;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
}

.minmax-sandbox .control-group input[type="range"] {
    flex: 1;
    min-width: 60px;
    background: transparent;
    padding: 6px 0;
    height: 20px;
}

/* WebKit: center thumb on track (thumb 14px, track 6px → margin-top -4px) */
.minmax-sandbox .control-group input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
    background: #444;
}

.minmax-sandbox .control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-cyan);
    margin-top: -4px;
    cursor: pointer;
}

/* Firefox: center thumb on track */
.minmax-sandbox .control-group input[type="range"]::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: #444;
}

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

.minmax-sandbox .control-group .control-value {
    flex-shrink: 0;
    font-size: 0.75rem;
    min-width: 3.5em;
    text-align: right;
}

.minmax-sandbox select {
    background: #2a2a2a;
    border: 1px solid var(--border);
}

.minmax-sandbox input[type="range"] {
    border: none;
}

.minmax-sandbox select:hover,
.minmax-sandbox input[type="range"]:hover {
    border-color: var(--accent-cyan);
}

.minmax-sandbox .button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.minmax-sandbox button {
    background: #333;
    color: white;
    border: 1px solid var(--border);
    padding: 10px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-family: inherit;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.minmax-sandbox button:hover {
    background: #444;
    border-color: var(--accent-cyan);
}

.minmax-sandbox button.primary {
    background: var(--accent-cyan);
    color: #000;
    grid-column: span 2;
    border-color: var(--accent-cyan);
}

.minmax-sandbox button.primary:hover {
    background: #33eeff;
    box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}

.minmax-sandbox button.primary.paused {
    background: var(--accent-magenta);
    color: white;
}

.minmax-sandbox button.primary.paused:hover {
    background: #ff3399;
}

.minmax-sandbox hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 8px 0;
}

/* Stats panel */
.minmax-sandbox .stats-panel {
    background: #0a0a0a;
    padding: 16px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 0.85rem;
    border: 1px solid var(--border);
}

.minmax-sandbox .stat {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    gap: 12px;
}

.minmax-sandbox .stat:last-child {
    margin-bottom: 0;
}

.minmax-sandbox .stat span {
    color: var(--text-dim);
}

.minmax-sandbox .stat b {
    color: var(--accent-cyan);
    font-weight: 600;
}

/* Probability meter for Simulated Annealing */
.minmax-sandbox .prob-meter {
    margin-top: 8px;
}

.minmax-sandbox .prob-meter label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-bottom: 4px;
}

.minmax-sandbox .prob-bar-bg {
    height: 8px;
    background: #2a2a2a;
    border-radius: 4px;
    overflow: hidden;
}

.minmax-sandbox .prob-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff4444, var(--accent-cyan));
    border-radius: 4px;
    transition: width 0.2s ease;
}

/* Log console */
.minmax-sandbox .log-console {
    background: #0a0a0a;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    max-height: 120px;
    overflow-y: auto;
    font-size: 0.75rem;
    line-height: 1.5;
}

.minmax-sandbox .log-entry {
    margin-bottom: 4px;
    color: #aaa;
}

.minmax-sandbox .log-entry.accepted {
    color: var(--accent-green);
}

.minmax-sandbox .log-entry.rejected {
    color: #ff6666;
}

.minmax-sandbox .log-entry.info {
    color: var(--accent-cyan);
    font-weight: 600;
}

/* Canvas container: strictly locked to 800px */
.minmax-sandbox .canvas-container {
    width: 800px;
    flex: 0 0 800px;
    position: relative;
    background: var(--bg-dark);
    display: flex;
    align-items: stretch;
    justify-content: center;
    padding: 0;
}

.minmax-sandbox .viz-2d {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.minmax-sandbox .viz-3d-stack {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px;
    min-height: 0;
}

.minmax-sandbox .viz-3d-stack .plot-3d {
    flex: 1;
    min-height: 240px;
    aspect-ratio: 4/3;
}

.minmax-sandbox #minmaxCanvas {
    width: 800px;
    height: 480px;
    display: block;
    background: var(--bg-dark);
}

/* Responsive */
@media (max-width: 900px) {
    .minmax-sandbox .app-container {
        flex-direction: column;
    }

    .minmax-sandbox .sidebar {
        width: 100%;
        min-width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}