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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    /* Removed custom background-color so common-styles.css takes over */
    overflow: hidden;
    position: relative;
    font-family: var(--font-primary);
    color: var(--text-dark);
}

.controls {
    position: absolute;
    top: 80px; /* offset by navbar height */
    left: 20px;
    background: var(--bg-primary);
    padding: 16px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    gap: 16px;
    z-index: 10;
    min-width: 180px;
    border: 1px solid var(--border-color);
}

.controls button {
    padding: 10px 16px;
    cursor: pointer;
    background-color: var(--primary-color);
    /* Clean modern */
    color: var(--text-white);
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.controls button:hover {
    background-color: var(--primary-dark);
}

.controls button:active {
    transform: scale(0.98);
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 13px;
    color: var(--text-dark);
    font-weight: 500;
}

.slider-group input[type="range"] {
    cursor: pointer;
    width: 100%;
    accent-color: var(--primary-color);
}

.slider-group input[type="number"],
.slider-group select {
    background-color: var(--bg-primary);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
}

.canvas-container {
    /* Square container taking max available space while preserving aspect ratio */
    width: min(100vw, calc(100vh - 4rem));
    height: min(100vw, calc(100vh - 4rem));
    padding: 2vmin;
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    background-color: white;
    border: none;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    width: 100%;
    height: 100%;
    cursor: crosshair;
    border-radius: 4px;
}