@media only screen and (max-width: 39em){
/* header */
    .head-logo {
        width: 50%;
    }
    .logo {
        width: 50%;
        padding-left: 6%;
    }
    .head.shead .logo {
        width: 45%;
    }
    .head-list{
        display: none;
    }
    .phn-menu{
        display: block;
       width: 50%;
        justify-items: end;
        align-content: center;
    }
    .phn-mnu{
        position: relative;
        /* height: 10px; */
        /* width: 30px; */
        right: 15px;
                display: block;
        z-index: 999;
        width: 10%;
        float: right;
        align-content: end;
        align-items: end;
        padding-left: 0%;
    }
    .phn-mnu > a{
        /* align-self: self-end; */
        position: relative;
        width: 100%;
        


    }
    .phn-mnu > a > span{
        position: absolute;
        display: block;
        content: "";
        width: 20px;
        height: 1px;
        background: #000;
        transition: 1s;
        /* right: 0px; */

        /* align-self: self-end;
        justify-self: flex-start; */

    }
    .phn-mnu > a > span::before{
        position: absolute;
        display: block;
        content: "";
        width: 20px;
        height: 1px;
        background: #000;
        top: -5px;
        transition: 1s;

    }  
    .phn-mnu > a > span::after{
        position: absolute;
        display: block;
        content: "";
        width: 20px;
        height: 1px;
        background: #000;
        top: 5px;
        transition: 1s;

    }
    .phn-mnu > a.opened span{
        width: 0px;
        height: 0px;
        transition: 1s;
    }
    .phn-mnu > a.opened span::before{
        top: 0px;
        transition: 1s;
        transform: rotate(40deg);
    }
    .phn-mnu > a.opened span::after{
        top: 0px;
        transition: 1s;
        transform: rotate(140deg);
    }
    
    .menu-list{
        display: none;
        background: #a3a3a3e0;
    }
    .menu-list > ul{
        width: 80%;
        margin: 0 auto;
    }
    .menu-list > ul > li{
        border-bottom: 1px solid#ececec;
        padding-top: 5%;
        text-align: end;
    }
    .menu-list > ul > li > a{
        padding-bottom: 1%;
        color: #fff;
        letter-spacing: 2px;
    }

/* banner */
    .banner-txt > h3 {
        font-size: 17px;
        width: 90%;
    }

    /* body content */

    .anechoic{
        display: block;
        width: 90%;
    }
    .anech-1{
        width: 100%;
    }
    .anechoic-txt {
        width: 100%;
    }
    .anechoic-txt > h3{
        font-size: 22px;
        text-align: center;
    }
    .anechoic-txt > p {
        font-size: 15px;
        text-align: justify;
    }
    .anechoic-img{
        padding-top: 5%;
    }
    .thrd-top > h3 {
        font-size: 25px;
    }
    .thrd-para{
        width: 100%;
        font-size: 17px;
        text-align: justify;
    }
    .thrd-down {
        display: block;
    }
    .category{
        margin-top: 4%;
        padding: 5% 0%;
    }
    .thrd-content {
        width: 90%;
    }
    .thrd-para > p {
        width: 90%;
    }


/* about page */

.abt-txt{
    font-size: 15px;
    text-align: justify;
}
.abt-img {
    padding-top: 15%;
}
    

/* blog page */

.blogs{
    padding-top: 15%;
}
.card-container {
    width: 90%;
    padding: 0px;
}


/* contact page */

.cont-first{
    display: block;
    padding-top: 20%;
}
.first-para {
    width: 100%;
}
.first-para > h3 {
    width: 100%;
    font-size: 36px;
    line-height: 33px;
}
.first-para > p{
    width: 100%;
    text-align: justify;
}
.first-image {
    width: 100%;
}
.cont-body {
    display: block;
    width: 90%;
}
.contacts {
    width: 50%;
    margin: 0 auto;    
}
.address {
    width: 40%;
    margin: 0 auto;
}
.address-img {
    display: block;
    width: 100%;
    padding-top: 5%;
}
.add-img {
    width: 100%;
}

/* service page */

.service-head {
    padding-top: 16%;
}
.service{
    display: block;
}
.service > .service-photo {
    width: 100%;
}
.service-para {
    width: 100%;
}
.main-service{
    padding-bottom: 3%;
}
.form {
    display: block;
    width: 90%;
}
.form-text {
    align-content: center;
    font-size: 20px;
    width: 100%;
    text-align: justify;
}
.form-detail {
    width: 100%;
    padding-top: 7%;
}

/* button {
    width: 40%;
} */
.sub-menu {
    position: absolute;
    top: 45px;
    left: 0;
    min-width: 200px;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    left: -38px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}
.semi-top {
    padding-top: 22%;
    width: 90%;
    margin: 0 auto;
    border-bottom: 1px solid #a2a2a2;
    padding-bottom: 1%;
}
.semi-top h1 {
    font-size: 25px;
    width: 90%;
}
.semi-top p {
    text-align: justify;
    width: 90%;
}
.semi-cen-head {
    font-size: 25px;
}
.semi-cen-body {
    display: block;
}
.semi-cen-img {
    width: 100%;
}
.semi-cen-txt {
    width: 100%;
}
.standards-section, .specs-section {
    display: flex;
    flex-wrap: wrap;
}
.semi-center {
    width: 90%;
}
.column .table {
    width: 100%;
}
.fully-top {
    display: block;
    width: 90%;
    margin: 0 auto;
    padding-top: 22%;
}
.fully-left, .fully-right {
    width: 100%;
}
.fully-right h1 {
    font-size: 25px;
}
.fully-middle {
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
}
.fully-test {
    padding: 2% 0%;
}
.fully-table-container h2 {
    font-size: 25px;
}
.fully-custom-table {
    width: 100%;
    border-collapse: collapse;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
 
.table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch; /* smooth scroll on iOS */
}
.fully-last {
    width: 90%;
    display: block;
}
.last-left {
    width: 100%;
}
.last-right {
    width: 100%;
}
.hemi-top {
    padding-top: 22%;
    width: 90%;
    display: block;
}
.hemi-left {
    width: 100%;
}
.hemi-right {
    width: 100%;
    padding-left: 0%;
}
.hemi-right h1 {
    font-size: 25px;
}
.hemi-right p {
    text-align: justify;
}
.hemi-top-but {
    padding-top: 5%;
}
.hemi-middle {
    width: 90%;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
}
.hemi-test {
    text-align: center;
    padding: 2% 0%;
}
.sound h2 {
    font-size: 25px;
    padding-top: 3%;
}
.wedge h3 {
    font-size: 25px;
}
.wedge-title {
    margin-bottom: 0px;
}
.sound-insulation-transmission-loss h2 {
    font-size: 25px;
}
#faq .faq-head {
    font-size: 25px;
}
#faq .faq-list > li > a {
    width: 90%;
}
.options-grid {
    grid-template-columns: 1fr;
}
.rf-shielded-room-content h2 {
    font-size: 25px;
}
.rf-shielded-room-content p {
    font-size: 15px;
}
.rf-shielded-room {
    padding: 0px 5%;
    background: #fff;
    font-family: Arial, sans-serif;
}
.rf-shielded-room-container {
    padding-top: 22%;
}
.spec-grid {
    grid-template-columns: 1fr;
}
.typical-head {
    padding: 3% 0%;
}
.milli-to-head {
    font-size: 25px;
    padding: 3% 0%;
}
.positioner-details, .turntable-theta {
    grid-template-columns: 150px 1fr;
}
    .footer {
        /* display: grid; */
        grid-template-columns: 169px 1fr;
    }
.foot-list:last-child > ul > li img {
    width: 16%;
}
.foot-list > ul > li > a {
    color: #fff;
    display: flex;
    gap: 10px;
}
.foot-list {
    padding-left: 5%;
    padding-top: 2%;
    width: 100%;
}

 
}