#hanoi {
    background-color: black;
    width: 60%;
    aspect-ratio: 16 / 9;
}

#start-btn {
    margin-right: 15px;
}

#status-bar, #button-bar {
    width: 60%;
    user-select: none;
}

.rod {
    width:  25%;
    height: 70%;
    user-select: none;
    background: linear-gradient(
        to right,
        black 0,
        black calc(50% - 5px),
        lightgray calc(50% - 5px),
        lightgray calc(50% + 5px),
        black calc(50% + 5px),
        black 100%
    );
}

.rod > img {
    width: 100%;
}

@media (max-width: 1399px) {
    #start-btn {
        margin-right: 3px;
    }
}

@media (max-width: 1150px) {
    #status-bar, #button-bar, #hanoi {
        width: 70%;
    }
}

@media (max-width: 1000px) {
    #status-bar, #button-bar, #hanoi {
        width: 80%;
    }
}

@media (max-width: 870px) {
    #button-bar, #status-bar {
        flex-direction: column;
    }

    #button-bar > div:nth-child(1) {
        order: 2;
        margin-top: 15px;
        margin-bottom: 20px;
    }

    #button-bar > div:nth-child(2) {
        order: 3;
    }

    #status-bar > div:nth-child(2) {
        order: 3;
    }
}