#radio-interface {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--main-color-background);
    z-index: 901;
    width: min(90vw, 500px);
    padding: 10px;
    pointer-events: none;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.15s ease-out, transform 0.15s ease-out;
    color: var(--text-color);
    gap: 10px;
}
#radio-interface.radio-interface-active {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}
#radio-keyboard {
    display: grid;
    grid-template:
    "k1 k2 k3" 40px
    "k4 k5 k6" 40px
    "k7 k8 k9" 40px
    ". k0 ." 40px
    "back delete tune"40px / 1fr 1fr 1fr;
    gap: 2px;
}
#radio-current-frequency {
    justify-self: center;
}
#radio-current-frequency::before{
    content: "frequency : ";
    font-weight: bold;
}
#radio-current-frequency::after{
    content: " Mhz";
}