/* Extra small devices (phones, 600px and down) */

.navbar {
    position: relative;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-pack: justify;
    justify-content: space-between;
    padding: 0rem 1rem;
}

@media only screen and (max-width: 600px) {

    .tentruong {
        color: #ffb71e;
        text-align: left;
        font-size: 17px;
    }

    .topBanner {
        height: 35px;
        background-color: #5b0013;
    }

    .flag-icon {
        height: 30px;
        width: auto;
        float: right;
        padding: 5px;
        margin-top: 2px;
    }

    .h3-matruong {
        text-align: left;
        color: #ffffff;
        font-size: 10px;
        margin-top: 10px;
    }

    .h3-hotline {
        text-align: center;
        color: yellow;
        font-size: 10px;
        margin-top: 5px;
    }

}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
    .tentruong {
        color: #ffb71e;
        text-align: left;
        font-size: 17px;
    }

    .topBanner {
        height: 35px;
        background-color: #5b0013;
    }

    .flag-icon {
        height: 30px;
        width: auto;
        float: right;
        padding: 5px;
        margin-top: 2px;
    }

    .h3-matruong {
        text-align: left;
        color: #ffffff;
        font-size: 10px;
        margin-top: 10px;
    }

    .h3-hotline {
        text-align: center;
        color: yellow;
        font-size: 10px;
        margin-top: 10px;
    }
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {
    .tentruong {
        color: #ffb71e;
        text-align: left;
        font-size: 18px;
    }

    .topBanner {
        height: 35px;
        background-color: #5b0013;
    }

    .flag-icon {
        height: 30px;
        width: auto;
        float: right;
        padding: 5px;
        margin-top: 2px;
    }

    .h3-matruong {
        text-align: left;
        color: #ffffff;
        font-size: 10px;
        margin-top: 10px;
    }

    .h3-hotline {
        text-align: center;
        color: yellow;
        font-size: 10px;
        margin-top: 10px;
    }
}

/* Large devices (laptops/desktops, 992px and up) */
@media only screen and (min-width: 992px) {
    .topBanner {
        height: 35px;
        background-color: #5b0013;
    }

    .flag-icon {
        height: 30px;
        width: auto;
        float: right;
        padding: 5px;
        margin-top: 2px;
    }

    .h3-matruong {
        text-align: left;
        color: #ffffff;
        font-size: 13px;
        margin-top: 10px;
    }

    .h3-hotline {
        text-align: center;
        color: yellow;
        font-size: 13px;
        margin-top: 10px;
    }
}

/* Extra large devices (large laptops and desktops, 1200px and up) */
@media only screen and (min-width: 1200px) {
    .topBanner {
        height: 35px;
        background-color: #5b0013;
    }

    .flag-icon {
        height: 30px;
        width: auto;
        float: right;
        padding: 5px;
        margin-top: 2px;
    }

    .h3-matruong {
        text-align: left;
        color: #ffffff;
        font-size: 15px;
        margin-top: 10px;
    }

    .h3-hotline {
        text-align: center;
        color: yellow;
        font-size: 15px;
        margin-top: 10px;
    }
}