body {
    font-family: 'Segoe UI',Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    margin: 0;
    height: 100vh;
    background: #1e1e1e; 
    color: #ddd;
}

.sidebar {
    width: 320px;
    padding: 20px;
    background: #252526;
    overflow-y: auto;
    box-shadow: 2px 0 5px rgba(0,0,0,0.5);
    z-index: 10;
}

.main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
    align-items: center;
    justify-content: center;
    background: #1e1e1e;
}

canvas {
    background: #333;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    cursor: crosshair;
}

h2 {
    margin-top: 0;
    color: #fff;
    font-size: 20px;
    border-bottom: 1px solid #444;
    padding-bottom: 10px;
}
.control-group {
    margin-bottom: 15px;
}

.control-row {
    display: flex;
    gap: 10px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 13px;
    color: #aaa;
}

select, input[type="number"] {
    width: 100%;
    padding: 6px;
    box-sizing: border-box;
    background: #3c3c3c;
    color: white;
    border: 1px solid #555;
    border-radius: 3px;
}

input[type="range"] {
    width: 100%;
}

button {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    background: #0e639c;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #1177bb;
}

button.secondary {
    background: #444;
}

button.secondary:hover {
    background: #555;
}

.hidden {
    display: none;
}

.stats {
    margin-top: 20px;
    padding: 15px;
    background: #111;
    border-radius: 5px;
    font-family: monospace;
    font-size: 14px;
}

.stats span {
    font-weight: bold;
    color: #4fc3f7;
}

.legend {
    display: flex;
    gap: 10px;
    font-size: 12px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.legend div {
    display: flex;
    align-items: center;
    gap: 5px;
}

.box {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}