```css
/* ===================================================
   Science Today Journal - Cascading Style Sheet (CSS)
   =================================================== */

/* ===== General Body Styling ===== */
body {
    font-family: "Times New Roman", serif;
    font-size: 12pt;
    line-height: 1.5;
    text-align: justify;
    margin: 1in;
    color: #222222;
    background-color: #ffffff;
}

/* ===== Page Setup ===== */
@page {
    size: A4;
    margin: 1in;
}

/* ===== Title Styling ===== */
h1 {
    font-size: 16pt;
    font-weight: bold;
    text-align: center;
    color: #003366;
    margin-bottom: 20px;
}

/* ===== Main Headings ===== */
h2 {
    font-size: 14pt;
    font-weight: bold;
    color: #004080;
    margin-top: 25px;
    margin-bottom: 10px;
    border-bottom: 2px solid #004080;
    padding-bottom: 5px;
}

/* ===== Subheadings ===== */
h3 {
    font-size: 12pt;
    font-weight: bold;
    color: #0059b3;
    margin-top: 20px;
    margin-bottom: 8px;
}

/* ===== Paragraphs ===== */
p {
    margin-bottom: 12px;
}

/* ===== Lists ===== */
ul, ol {
    margin-left: 25px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 6px;
}

/* ===== Abstract Box ===== */
.abstract {
    border: 1px solid #cccccc;
    background-color: #f7f9fc;
    padding: 15px;
    border-left: 5px solid #004080;
    margin-bottom: 20px;
}

/* ===== Keywords ===== */
.keywords {
    font-style: italic;
    color: #444444;
    margin-bottom: 20px;
}

/* ===== Tables ===== */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

table th {
    background-color: #003366;
    color: white;
    padding: 10px;
    border: 1px solid #cccccc;
    text-align: center;
}

table td {
    padding: 8px;
    border: 1px solid #cccccc;
}

/* ===== Figures ===== */
figure {
    text-align: center;
    margin: 20px 0;
}

figcaption {
    font-size: 11pt;
    font-style: italic;
    margin-top: 8px;
}

/* ===== Citation & References ===== */
.references {
    font-size: 11pt;
    line-height: 1.6;
}

.references p {
    margin-bottom: 10px;
}

/* ===== Footer ===== */
footer {
    text-align: center;
    font-size: 10pt;
    color: #666666;
    margin-top: 40px;
    border-top: 1px solid #cccccc;
    padding-top: 10px;
}

/* ===== Journal Branding ===== */
.journal-title {
    text-align: center;
    color: #002855;
    font-size: 24pt;
    font-weight: bold;
    letter-spacing: 1px;
}

.tagline {
    text-align: center;
    font-style: italic;
    color: #0059b3;
    margin-bottom: 30px;
}

/* ===== Page Numbers ===== */
.page-number {
    position: fixed;
    bottom: 10px;
    width: 100%;
    text-align: center;
    font-size: 10pt;
    color: #555555;
}

/* ===== Links ===== */
a {
    color: #0059b3;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ===== Responsive Design ===== */
@media screen and (max-width: 768px) {

    body {
        margin: 20px;
        font-size: 11pt;
    }

    h1 {
        font-size: 18pt;
    }

    h2 {
        font-size: 15pt;
    }

    table {
        display: block;
        overflow-x: auto;
    }
}
```