body {
    background-color: ghostwhite;
    font-family: sans-serif;
    font-size: 14px;
}

/* For mobile phones: */

.col-main {
    width: 100%;
}

.burger_menu {
    display: block;
}

.phone_menu {
    display: none;
    background-color: black;
    position: absolute;
    width: 90%;
    z-index: 100;
}

.desktop_menu {
    display: none;
    background-color: black;
}

.menu_base {
    width: 100%;
}

.menu_link {
    color: whitesmoke;
    text-decoration: none;
    font-size: 20px;
}

.lbl_pair {
    color: black;
}

.lbl_ask {
    color: green;
}

.lbl_frm {
}

.btn_frm {
    font-weight: bold;
}

.txt_long {
    width: 250px;
}

.txt_med {
    width: 100px;
}

.img_panel {
    width: 100%;
}

.footer {
    font-size: 10px;
}

/* For tablets: */
@media only screen and (min-width: 600px) {
    body {
        background-color: ghostwhite;
        font-family: sans-serif;
        font-size: 16px;
    }

    .col-main {
        width: 590px;
    }

    .burger_menu {
        display: none;
    }

    .desktop_menu {
        display: block;
        background-color: black;
    }

    .menu_base {
        width: 16.66%;
    }

    .menu_link {
        color: whitesmoke;
        text-decoration: none;
        font-size: 18px;
    }

        .menu_link:hover {
            color: white;
            font-weight: bold;
            text-decoration: underline;
        }

    .img_panel {
        width: 48%;
        padding: 5px;
    }

    .footer {
        font-size: 12px;
    }
}

/* For desktop: */
@media only screen and (min-width: 1000px) {
    body {
        background-color: ghostwhite;
        font-family: sans-serif;
        font-size: 18px;
    }

    .col-main {
        width: 990px;
    }

    .burger_menu {
        display: none;
    }

    .desktop_menu {
        display: block;
        background-color: black;
    }

    .menu_base {
        width: 16.66%;
    }

    .menu_link {
        color: whitesmoke;
        text-decoration: none;
        font-size: 20px;
    }

        .menu_link:hover {
            color: white;
            font-weight: bold;
            text-decoration: underline;
        }

    .img_panel {
        width: 48%;
        padding: 5px;
    }

    .footer {
        font-size: 14px;
    }
}