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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #f0f0f0;
    font-family: Arial, sans-serif;
}

.ipod {
    width: 320px;
    max-width: 100%;
    background: #474747;
    border-radius: 25px;
    padding: 20px;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.3);
    position: relative;
}

.screen {
    background: #333;
    border-radius: 7px;
    padding: 4px;
    margin-bottom: 40px;
    text-align: center;
}

.screen img {
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: 4px;
}

.wheel-container {
    display: flex;
    justify-content: center;
}

.wheel {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: #212121;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.3);
}

.wheel-btn {
    position: absolute;
    width: 50px;
    height: 50px;
    background: transparent;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    cursor: pointer;
    user-select: none;
    border: none;
    font-size: 20px;
}

.wheel-btn.minus {
    left: 10px;
}

.wheel-btn.plus {
    right: 10px;
}

.wheel-center-btn {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #474747;
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    z-index: 2;
}

.wheel-top-btn, .wheel-bottom-btn {
    position: absolute;
    width: 60px;
    height: 30px;
    background: transparent;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 20px;
    z-index: 1;
}

.wheel-top-btn {
    top: 20px;
}

.wheel-bottom-btn {
    bottom: 20px;
}

@media (max-width: 400px) {
    .ipod {
        width: 90%;
    }
    .wheel {
        width: 200px;
        height: 200px;
    }
}