html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font: normal 16px / 24px "Roboto", Helvetica, Arial, Verdana, sans-serif;
}

body {
    transition: background-color .5s;
}

.container {
    border: none;
    box-shadow: 0px 0px 10px 0px gray;
    margin: auto;
    max-width: 1100px;
}

.inner {
    display: flex;
}

.center-box {
    border: none;
    margin: auto;
    width: 60%;
    min-height: 700px;
    margin-top: 10px;
    padding: 10px;
}

.title-div {
    border: solid 3px #187BB4;
    width: 95%;
    margin: auto;
}

.title {
    text-align: center;
    font-size: 15px;
    font-weight: bold;
    color: #187BB4;
}

.main__cont {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.box__img>img {
    width: 150px;
    max-width: 100%;
}

.box {
    padding: 10px;
    border: 1px solid rgb(219, 219, 219);
}

.box__title>h5 {
    font-size: 13px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333333;
    text-align: center;
}

.box__btn {
    display: flex;
    justify-content: center;
}

.box__btn>.download button {
    width: 120px;
    height: 35px;
    color: #fff;
    background-color: #54595F;
    font-size: 13px;
    outline: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.box__btn>.download button:hover {
    background-color: #646669;
    transition: 0.5s;
}

.flip-card {
    background-color: transparent;
    width: 130px;
    height: 180px;
    border: 1px solid #f1f1f1;
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.flip-card-front>img {
    width: 130px;
    max-width: 100%;
}

.flip-card-back {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #f0f0f0;
    color: #187BB4;
    transform: rotateY(180deg);
}

.flip-card-back>h1 {
    font-size: 23px;
    font-weight: bold;
}

.flip-card-back>p {
    font-size: 16px;
    margin-top: 10px;
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 15px;
}

.page_link {
    display: flex;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    margin: 10px;
    width: 50px;
    font-size: 16px;
    height: 35px;
    border-radius: 2px;
    font-size: 13px;
    text-decoration: none;
    color: #ffffff;
    background-color: #3E9CD2;
}

#active_PDF {
    border: solid #0f3558 !important;
    background-color: #0f3558 !important;
}

@media only screen and (max-width: 770px) {
    .inner {
        flex-direction: column;
    }
    .center-box {
        width: 95%;
        margin: 0 auto;
    }
    .main__cont {
        flex-direction: column;
    }
    .flip-card {
        width: auto;
    }
    .flip-card-front>img {
        width: 100%;
        height: 200px;
        object-fit: cover;
    }
}