“`html

/* Global Styles for Responsiveness and Aesthetics */
body {
font-family: ‘Segoe UI’, Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.7;
color: #333;
margin: 0;
padding: 0;
background-color: #f8f9fa; /* Light background for the page */
}

.article-container {
max-width: 900px;
margin: 30px auto;
padding: 30px;
background-color: #ffffff;
border-radius: 12px;
box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
text-align: justify;
overflow-x: hidden; /* Prevent horizontal scroll on small screens */
}

/* Responsive adjustments for smaller screens */
@media (max-width: 768px) {
.article-container {
margin: 15px;
padding: 20px;
border-radius: 8px;
}
}
@media (max-width: 480px) {
.article-container {
margin: 10px;
padding: 15px;
}
}

/* Headings Styling */
h1, h2, h3 {
color: #2c3e50; /* Darker blue-grey for headings */
margin-top: 1.5em;
margin-bottom: 0.8em;
}

h1 {
font-size: 2.8em;
font-weight: bold;
text-align: center;
margin-bottom: 0.6em;
line-height: 1.2;
}
@media (max-width: 768px) {
h1 { font-size: 2.2em; }
}
@media (max-width: 480px) {
h1 { font-size: 1.8em; }
}

h2 {
font-size: 2.1em;
font-weight: 700;
border-bottom: 2px solid #3498db; /* A vibrant blue for separation */
padding-bottom: 10px;
margin-top: 2.5em;
}
@media (max-width: 768px) {
h2 { font-size: 1.8em; }
}
@media (max-width: 480px) {
h2 { font-size: 1.5em; }
h2 { padding-bottom: 8px; }
}

h3 {
font-size: 1.6em;
font-weight: 600;
color: #34495e; /* Slightly lighter than h2 */
margin-top: 1.8em;
border-left: 5px solid #2ecc71; /* A nice green accent */
padding-left: 10px;
}
@media (max-width: 768px) {
h3 { font-size: 1.4em; }
}
@media (max-width: 480px) {
h3 { font-size: 1.2em; }
h3 { padding-left: 8px; }
h3 { border-left-width: 3px; }
}

/* Paragraphs and Lists */
p {
margin-bottom: 1em;
font-size: 1.1em;
}
@media (max-width: 480px) {
p { font-size: 1em; }
}

ul {
list-style: disc;
margin-left: 25px;
margin-bottom: 1em;
padding-left: 0;
}
ul li {
margin-bottom: 0.6em;
font-size: 1.05em;
}
@media (max-width: 480px) {
ul { margin-left: 15px; }
ul li { font-size: 1em; }
}

/* Table Styling */
.styled-table {
width: 100%;
border-collapse: collapse;
margin: 2em 0;
font-size: 1.05em;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
border-radius: 8px;
overflow: hidden; /* Ensures rounded corners apply to content */
}

.styled-table thead tr {
background-color: #3498db; /* Header background color */
color: #ffffff;
text-align: left;
}

.styled-table th,
.styled-table td {
padding: 14px 18px;
border: 1px solid #dddddd;
}

.styled-table tbody tr {
border-bottom: 1px solid #dddddd;
}

.styled-table tbody tr:nth-of-type(even) {
background-color: #f3f3f3; /* Zebra striping */
}

.styled-table tbody tr:last-of-type {
border-bottom: 2px solid #3498db;
}
@media (max-width: 600px) {
.styled-table, .styled-table thead, .styled-table tbody, .styled-table th, .styled-table td, .styled-table tr {
display: block; /* Make table responsive by stacking on smaller screens */
}
.styled-table thead tr {
position: absolute;
top: -9999px;
left: -9999px;
}
.styled-table tr {
border: 1px solid #ddd;
margin-bottom: 10px;
border-radius: 8px;
}
.styled-table td {
border: none;
border-bottom: 1px solid #eee;
position: relative;
padding-left: 50%;
text-align: right;
}
.styled-table td:before {
position: absolute;
top: 6px;
left: 6px;
width: 45%;
padding-right: 10px;
white-space: nowrap;
text-align: left;
font-weight: bold;
color: #555;
}
/* Data labels for responsiveness (must match table headers) */
.styled-table td:nth-of-type(1):before { content: “عامل موثر”; }
.styled-table td:nth-of-type(2):before { content: “تأثیر بر قیمت”; }
}

/* Infographic-style Block */
.infographic-block {
background-color: #e8f8f5; /* Light greenish-blue background */
border: 1px solid #2ecc71;
border-radius: 10px;
padding: 25px;
margin: 2.5em 0;
box-shadow: 0 6px 15px rgba(46, 204, 113, 0.15);
display: flex;
flex-direction: column;
gap: 20px;
}
@media (max-width: 480px) {
.infographic-block {
padding: 15px;
gap: 15px;
}
}

.info-item {
display: flex;
align-items: flex-start;
gap: 15px;
}
.info-item .icon {
font-size: 2.2em;
color: #2ecc71; /* Green icon color */
flex-shrink: 0;
line-height: 1; /* Align icon better */
}
.info-item .text h4 {
margin: 0;
font-size: 1.3em;
color: #2c3e50;
font-weight: 600;
}
.info-item .text p {
margin-top: 0.5em;
font-size: 1.0em;
line-height: 1.6;
color: #555;
}
@media (max-width: 480px) {
.info-item { gap: 10px; }
.info-item .icon { font-size: 1.8em; }
.info-item .text h4 { font-size: 1.1em; }
.info-item .text p { font-size: 0.9em; }
}

/* Table of Contents */
.table-of-contents {
background-color: #ecf0f1; /* Light grey background */
border: 1px solid #bdc3c7;
border-radius: 8px;
padding: 20px;
margin: 2em 0;
box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}
.table-of-contents h3 {
color: #2c3e50;
margin-top: 0;
padding-left: 0;
border-left: none;
border-bottom: 1px solid #bdc3c7;
padding-bottom: 10px;
}
.table-of-contents ul {
list-style: none; /* No bullet points for TOC */
padding: 0;
margin-top: 15px;
}
.table-of-contents ul li {
margin-bottom: 0.8em;
}
.table-of-contents ul li a {
color: #3498db;
text-decoration: none;
font-weight: 500;
transition: color 0.3s ease;
}
.table-of-contents ul li a:hover {
color: #2980b9;
text-decoration: underline;
}
@media (max-width: 480px) {
.table-of-contents { padding: 15px; }
.table-of-contents h3 { font-size: 1.3em; padding-bottom: 8px; }
.table-of-contents ul li a { font-size: 0.95em; }
}

“`