:root {
    --bodyBgC: #121212;
    --txtColor: #fff;
    --linkColor: #7ce2ff;
}

[data-theme="light"] {
    --bodyBgC: #afafaf;
    --txtColor: #000;
    --linkColor: #002aaf;
}

body {
    background-color: var(--bodyBgC);
    font-family: system-ui;
}

.nadpisGravCube{
    font-size: 42px;
}

.downloadTxtCely{
    font-size: 28px;
}

.odkazDownload{
    color: var(--linkColor);
}

.tocelyGravCube{
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;

    color: var(--txtColor);
}


.gallery-container {
    position: relative;
    width: 600px;
    max-width: 90%;
}

.gallery-container img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    display: block;
}

.arrBtn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1;
    border-radius: 50%;
    user-select: none;
}

#prevBtn {
    left: 10px;
}

#nextBtn {
    right: 10px;
}