.prevodnik {
    width: fit-content;
    margin-top: 1em;
    margin-bottom: 1em;
    padding: 1em;
    /*background-color: #001018;*/
    border-radius: 1em;
    border: 0.1em solid #fff;
    display: inline-block;
}

.nadpis_prevodnik {
    margin-top: 0;
    margin-bottom: 0.2em;
}

#cVstup_prevodnik {
    padding: 0.25em;
    border-radius: 0.5em;
    background-color: #0080ff;
    border-color: #fff;
    font-weight: 900;
}
::placeholder {
    color: #fff;
}

.context_menu {
    padding: 0.25em;
    border-radius: 0.5em;
    background-color: #0080ff;
    border-color: #fff;
    font-weight: 900;
}
.context_menu option {
    font-weight: 800;
}

#cVysledok_prevodnik {
    display: block;
    margin-top: 1em;
    padding: 0.25em;
    border-radius: 0.25em;
    border: 0.1em solid #fff;
    background-color: #ffffa0;
    font-size: 16px;
    font-weight: 900;
    color: black;
}

#tl_prehod_sustavy {
    display: inline-block;
    width: auto;
    height: 100%;
    background-color: #0080ff;
    border-radius: 0.25em;
    border: 1px solid white;
    cursor: pointer;
}
#tl_prehod_sustavy img {
    width: 1em;
    height: 1em;
}

@media screen and (max-width: 750px) {
    #cVstup_prevodnik {
        width: 100%;
        display: block;
    }
    .context_menu {
        display: block;
        margin-top: 0.5em;
    }
    #tl_prehod_sustavy {
        margin-top: 0.4em;
    }
    #tl_prehod_sustavy img {
        rotate: 90deg;
    }
}