.main-page {
    padding: 3% 15%;
    font-size: 1.4rem;
}

.main-page .header {
    background-color: black;
    color: #fff;
    display: grid;
    grid-template-columns: repeat(100, 1fr);
    padding: 3%;
    background-image: url('background_image.png');
    background-repeat: no-repeat;
    background-size: cover;
}

.main-page .header .background-image {
    height: 200px;
    grid-column: 1 / 101;
}

.main-page .header .title {
    /* width: 60%; */
    grid-column: 1 / 101;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.5);
}


.main-page .break-line {
    margin: 30px 0;
    background-color: #353187;
    height: 1px;
}

.main-page .container .introduction,
.main-page .container .PPI-networks,
.main-page .container .essential-proteins,
.main-page .container .source-codes,
.main-page .container .references {
    text-align: justify;
}

.main-page .container .PPI-networks img {
    width: 100%;
    object-fit: cover;
}

.main-page .container .essential-proteins .essential-proteins-table {
    border: 1px solid black;
    margin-top: 30px;
}

.main-page .container .essential-proteins .essential-proteins-table th, 
.main-page .container .essential-proteins .essential-proteins-table td {
    border: 1px solid black;
    padding: 5px;
    text-align: center;
}

.main-page .container .source-codes .description .process-DIP .description,
.main-page .container .source-codes .description .map-DIP-to_STRING .description {
    padding-left: 2.5%;
}

.main-page .footer {
    background-color: black;
    color: #fff;
    padding: 3%;
    background-image: url('background_image.png');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: bottom;
    height: 300px;
    position: relative;
}

.main-page .footer .description {
    position: absolute;
    bottom: 10px;
    font-size: 1.1rem;
}

.main-page .footer .description .email {
    color: #134482;
    font-weight: bold;
}