:root {
    --cube-size: 2em;
    --sticker-size: 92%;
    --cube-speed: 0.4s;

    /* Rubik Colors */
    --color-blue: #0045ad;
    --color-green: #009b48;
    --color-white: #ffffff;
    --color-yellow: #ffd500;
    --color-orange: #ff5800;
    --color-red: #b71234;
    --cube-bg: #111;
}

[data-theme="dark"] {
    --cube-bg: #000;
}

.playground {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
    text-align: center;
}

.cube-section-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--text-primary);
}

#cube-container {
    height: 400px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
    cursor: grab;
    touch-action: none;
    user-select: none;
}

#cube-container:active {
    cursor: grabbing;
}

.scene {
    width: 0;
    height: 0;
    transform-style: preserve-3d;
}

.cube-pivot {
    width: 0;
    height: 0;
    transform-style: preserve-3d;
    transition: transform var(--cube-speed);
}

.cube-body {
    position: absolute;
    transform-style: preserve-3d;
    margin-left: calc(var(--cube-size) / -2);
    margin-top: calc(var(--cube-size) / -2);
}

.piece {
    position: absolute;
    width: calc(var(--cube-size) - 0.1em);
    height: calc(var(--cube-size) - 0.1em);
    transform-style: preserve-3d;
}

.face {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--cube-bg);
    border: 1px solid var(--cube-bg);
    border-radius: 4px;
    backface-visibility: hidden;
    transition: background 0.2s ease;
}

.piece:hover .face {
    background: #333;
}

/* Face positioning */
.face.front {
    transform: rotateY(0deg) translateZ(calc(var(--cube-size) / 2));
}

.face.back {
    transform: rotateY(180deg) translateZ(calc(var(--cube-size) / 2));
}

.face.right {
    transform: rotateY(90deg) translateZ(calc(var(--cube-size) / 2));
}

.face.left {
    transform: rotateY(-90deg) translateZ(calc(var(--cube-size) / 2));
}

.face.top {
    transform: rotateX(90deg) translateZ(calc(var(--cube-size) / 2));
}

.face.bottom {
    transform: rotateX(-90deg) translateZ(calc(var(--cube-size) / 2));
}

.sticker {
    position: absolute;
    top: 4%;
    left: 4%;
    width: var(--sticker-size);
    height: var(--sticker-size);
    border-radius: 3px;
    box-shadow: inset 1px 1px 2px rgba(255, 255, 255, 0.2), inset -1px -1px 2px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease;
}

.piece:hover .sticker {
    transform: translateZ(4px) scale(0.95);
}

.cube-controls {
    margin-top: 20px;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.cube-btn {
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cube-btn:hover {
    background: var(--text-primary);
    color: var(--bg-color);
    transform: translateY(-2px);
}

/* Sticker colors */
.sticker.blue {
    background-color: var(--color-blue);
}

.sticker.green {
    background-color: var(--color-green);
}

.sticker.white {
    background-color: var(--color-white);
}

.sticker.yellow {
    background-color: var(--color-yellow);
}

.sticker.orange {
    background-color: var(--color-orange);
}

.sticker.red {
    background-color: var(--color-red);
}

/* Interaction Guides */
.guide {
    position: absolute;
    width: var(--cube-size);
    height: calc(var(--cube-size) * 3);
    pointer-events: none;
}

@media (max-width: 768px) {
    #cube-container {
        height: 300px;
        transform: scale(0.8);
    }
}