.overlay{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s, visibility .35s, height .35s;
    overflow: hidden;
    background: black;
    z-index: -1;
}

#main-menu {
    display: block;
    height: 100px;
    width: 100%;
    background: #3D0E61;
    margin: 0px;  
    z-index: 9;
}

#main-menu ul {
    max-width: 800px;
    width: 100%;
    height: 100%;
    margin: 0px auto;
    padding: 0px;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    z-index: 9;
}

#main-menu li {
    list-style-type: none;
    font-size: 2rem;
}

#main-menu a {
    color: #FF8731;
    font-size: 1.5rem;
    text-decoration: none;
}

#main-menu a:hover {
    text-decoration: underline;
}

#hamburger-input{
    display: none;
}

#hamburger-menu {
    position: fixed;
    top: 20px;
    left: 99px;
    width: 50px;
    height: 45px;
    display: none;
    border: none;
    padding: 0px;
    margin: 0px;
    font-family: 'Cabin', Sans-serif;
    background: linear-gradient(
        to bottom, 
        #11112E, #11112E 20%, 
        white 20%, white 40%, 
        #11112E 40%, #11112E 60%, 
        white 60%, white 80%, 
        #11112E 80%, #11112E 100%
        );
}

#hamburger-menu #sidebar-menu {
    visibility: hidden;
    position: fixed;
    top: 0;
    left: -250px;
    width: 200px;
    height: 100%;
    background-color: #11112E;
    transition: 0.3s;
    padding: 0px 10px;
    box-sizing: border-box;
}

#hamburger-menu h3 {
    color: white;
    font-size: 1.3rem;
    font-weight: 550;
    margin: 35px;
}

#hamburger-menu ul {
    padding-left: 0px;
}

#hamburger-menu li {
    list-style-type: none;
    line-height: 3rem;
}

#hamburger-menu a {
    color: #c6babada;
    font-size: 1.3rem;
    text-decoration: none;
}

#hamburger-menu a:hover {
    color: rgb(249, 249, 249);
    text-decoration: none;
}

#hamburger-input:checked + #hamburger-menu #sidebar-menu {
    visibility: visible;
    left: 0;
}
#hamburger-input:checked ~ .overlay{
    visibility: visible;
    opacity: 0.4;
}


@media screen and (max-width: 1000px) {
    #introductions {
        margin: 0 auto;
        text-align: start;
    }
    #main-menu {
        display: none;
    }
    #first-Nav {
        display: none;
    }
    #hamburger-menu {
        display: inline;
    }
    #abt-img {
        width: 250px;
        height: 200px;
    }
    #abt-btn-buynow {
        margin-left: 90px;
    }
    #ourHistory-container img {
        width: 350px;
        height: 300px;
    }
    #ourHistory-title { 
        margin: 0 auto;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
        align-items: center;
    }


    .collections {
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    #testimonials-container {
        margin-bottom: 25%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    #testimonials-container2 {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    #circlebtn-container {
        display: none;

    }
    .footer-container {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    .video-container {  
        position: relative;
    }
    #what-we-works {
        margin: 0 auto;
        align-items: center;
        text-align: center;
        display: flex;
        flex-wrap: wrap;
    }
    #div-btn-buy {
        font-size: 11px;
    }
    #product-features-containers {
        max-width: 700px;
    }
    #product-features-containers div {
        width: 90px;
        height: 20px;
    }
    .collections .column {
        line-height: normal;
        margin: 1px 50px 20px 20%;
        width: 50%;
    }
    #works-unorderedList {
        margin: 5px 5% 0px 5%;
    }
    #Ourhistory-section {
        margin-top: 20%;
    }
    #history-jampinterKu {
        margin: 0 auto;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
        align-items: center;

    }
    #history-jampinterKu img {
        width: 500px;
        margin: 0 auto;
        margin-top: 20px;
    }
    #history-jampinterKu a {
        font-size: 11px;
        text-align: center;
        align-items: center;
        margin: 20px auto;
    }
    #product-video {
        margin-top: 20%;
    }
    #about-us-section {
        display: flex;
        flex-wrap: wrap;
        margin: 0 auto;
        text-align: center;
        align-items: center;
        margin-top: 20px;
        margin-left: 30px;
        margin-right: 30px;
    }
    #about-us-section img {
        width: 400px;
        height: 300px;
        align-items: center;
        text-align: center;
        justify-content: center;
        margin: 10%;
    }
    #works-paragraphs-area {
        margin: 0 auto;
    }
}
@media screen and (max-width: 1300px) {
    #about-us-section {
        display: flex;
        flex-wrap: wrap;
    }
    .row-collections {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        margin: 0px 60% 5px 40%;
    }
    #introductions {
        margin: 0 auto;
        align-items: center;
        text-align: center;
        justify-content: center;
    }
    #abt-btn-buynow {
        justify-content: center;
        text-align: center;
        align-items: center;
        margin: 30px;
    }
}

@media screen and (max-width: 1100px) {
    .row-numbers {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    #buy-section h1{
        font-size: 50px;
    }
    #abt-btn-buynow {
        justify-content: center;
        text-align: center;
        align-items: center;
        margin: 30px;
    }
}

@media screen and (max-width: 1700px) {
    #abt-btn-buynow {
        margin-top: 40px;
        margin-left: 90px;
    }
    #abt-btn-buynow {
        justify-content: center;
        text-align: center;
        align-items: center;
        margin: 30px;
    }
    .collections h2 {
        max-width: 500px;
    }
}

@media screen and (max-width: 50%) {
    #abt-btn-buynow {
        margin-left: 90px;
    }
}

@media screen and (max-width: 560px) {
    #intro-title {
        text-align: center;
        justify-content: center;
        align-items: center;
        font-size: 15px;
    }
    #intro-word {
        font-size: 30px;
    }
    #intro-below {
        max-width: 450px;
        text-align: justify;
        text-align: center;
        align-items: center;
        justify-content: center;
        margin-left: 20px;
        word-wrap: wrap;
    }
    #btn-buy a {
        font-size: 15px;
    }
    #history-jampinterKu h1 {
        max-width: 500px;
        text-align: center;
        font-size: 27px;
        margin-right: 35px;
    }
    #history-jampinterKu p {
        max-width: 400px;
        margin: 0 auto;
        font-size: 15px;
        justify-content: center;
        align-items: center;
        text-align: justify;
        margin: 20px;
    }
    #product-features-containers {
        margin: 0 auto;
    }
    #abt-btn-buynow {
        justify-content: center;
        text-align: center;
        align-items: center;
        margin: 30px;
    }
    #history-jampinterKu a {
        margin: 0 auto;
    }
    footer {
        max-width: 490px;
    }
    #buy-section {
        max-width: 490px;
    }
    #product-video {
        max-width: 490px;
    }
    section {
        max-width: 490px;
    }
}