“`html

/* Base styles for the document, ensuring responsiveness and a clean look across devices */
body {
font-family: ‘Tahoma’, ‘Arial’, sans-serif; /* Professional, widely available font */
line-height: 1.7; /* Good readability */
color: #333; /* Dark gray for main text */
margin: 0;
padding: 0;
background-color: #f8f8f8; /* Light background for the page */
box-sizing: border-box; /* Include padding and border in the element’s total width and height */
}

/* Main container for the article, centered and with a defined max-width for readability on large screens */
.article-container {
max-width: 1000px; /* Max width for desktop viewing */
margin: 20px auto; /* Center the container with some top/bottom margin */
padding: 25px 30px; /* Internal padding for content */
background-color: #ffffff; /* White background for the article content */
box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08); /* Subtle shadow for depth */
border-radius: 12px; /* Slightly rounded corners */
overflow-x: hidden; /* Prevents horizontal scroll on smaller screens due to wide elements */
}

/* Heading 1 (H1) styling – main title of the article */
h1 {
font-size: 2.8em; /* Large font for prominence */
font-weight: bold;
color: #004d40; /* Deep teal for a professional, scientific feel */
text-align: center;
margin-bottom: 45px;
padding-bottom: 18px;
border-bottom: 4px solid #00796b; /* Stronger teal separator */
line-height: 1.3;
}

/* Heading 2 (H2) styling – major sections */
h2 {
font-size: 2.1em;
font-weight: bold;
color: #00796b; /* Teal */
margin-top: 40px;
margin-bottom: 25px;
padding-left: 20px;
border-left: 8px solid #4db6ac; /* Accent border on the left */
line-height: 1.4;
}

/* Heading 3 (H3) styling – sub-sections */
h3 {
font-size: 1.6em;
font-weight: bold;
color: #26a69a; /* Lighter teal */
margin-top: 30px;
margin-bottom: 18px;
padding-left: 12px;
line-height: 1.5;
}

/* Paragraph styling */
p {
margin-bottom: 1.5em;
font-size: 1.08em; /* Slightly larger font for readability */
color: #444;
}

/* Unordered list styling */
ul {
list-style-type: disc; /* Standard disc bullets */
margin-left: 30px;
margin-bottom: 1.8em;
padding: 0;
}

ul li {
margin-bottom: 0.9em;
font-size: 1.05em;
color: #555;
}

/* Table styling – for educational content */
table {
width: 100%;
border-collapse: collapse; /* Collapse borders for a clean look */
margin: 35px 0;
font-size: 1.05em;
box-shadow: 0 3px 10px rgba(0, 0, 0, 0.07); /* Subtle shadow */
border-radius: 10px;
overflow: hidden; /* Ensures border-radius applies to all corners */
}

th, td {
padding: 18px;
text-align: right; /* Right align text for Persian */
border-bottom: 1px solid #e0e0e0; /* Light gray border between rows */
}

th {
background-color: #e0f2f1; /* Very light teal background for headers */
color: #004d40;
font-weight: bold;
font-size: 1.15em;
}

tr:nth-child(even) {
background-color: #f7fcfc; /* Alternating row color for readability */
}

tr:hover {
background-color: #eafcfb; /* Hover effect for rows */
}

/* Custom “infographic-like” block – visual element */
.infographic-block {
background-color: #e0f2f1; /* Light teal background */
border-right: 8px solid #00796b; /* Darker teal accent border on right for Persian layout */
padding: 30px;
margin: 45px 0;
border-radius: 12px;
color: #004d40;
line-height: 1.6;
}

.infographic-block h3 {
color: #004d40; /* Ensure heading color contrasts with block background */
margin-top: 0;
border-right: none; /* Remove default h3 border */
padding-right: 0;
}

.infographic-block ul {
list-style-type: none; /* Remove default bullet from this specific list */
padding: 0;
margin-left: 0;
}

.infographic-block ul li {
margin-bottom: 18px;
padding-right: 35px; /* Space for the custom icon */
position: relative;
font-size: 1.1em;
color: #004d40;
}

.infographic-block ul li:before {
content: ‘⭐’; /* Custom star icon */
position: absolute;
right: 0; /* Position icon on the right for Persian */
top: 0;
font-size: 1.4em;
color: #fdd835; /* Gold color for the star */
}

/* Responsive adjustments for smaller screens (tablets and mobile) */
@media (max-width: 992px) {
.article-container {
margin: 15px auto;
padding: 20px 25px;
border-radius: 10px;
}

h1 {
font-size: 2.4em;
margin-bottom: 35px;
padding-bottom: 12px;
}

h2 {
font-size: 1.8em;
margin-top: 35px;
margin-bottom: 20px;
padding-left: 15px;
border-left: 6px solid #4db6ac;
}

h3 {
font-size: 1.4em;
margin-top: 25px;
margin-bottom: 15px;
padding-left: 10px;
}

p, ul li, th, td {
font-size: 1em;
}

.infographic-block {
padding: 25px;
margin: 35px 0;
}
.infographic-block ul li {
padding-right: 30px;
}
.infographic-block ul li:before {
font-size: 1.3em;
}
}

@media (max-width: 768px) {
.article-container {
margin: 10px auto;
padding: 18px 20px;
border-radius: 8px;
}

h1 {
font-size: 2em;
margin-bottom: 30px;
padding-bottom: 10px;
}

h2 {
font-size: 1.6em;
margin-top: 30px;
margin-bottom: 18px;
padding-left: 12px;
border-left: 5px solid #4db6ac;
}

h3 {
font-size: 1.3em;
margin-top: 22px;
margin-bottom: 12px;
padding-left: 8px;
}

p, ul li, th, td {
font-size: 0.95em;
padding: 15px;
}

table {
margin: 25px 0;
}

.infographic-block {
padding: 20px;
margin: 30px 0;
border-right: 6px solid #00796b;
}
.infographic-block ul li {
padding-right: 25px;
margin-bottom: 15px;
}
.infographic-block ul li:before {
font-size: 1.2em;
}
}

@media (max-width: 480px) {
.article-container {
margin: 5px auto;
padding: 15px;
border-radius: 5px;
}

h1 {
font-size: 1.7em;
margin-bottom: 25px;
padding-bottom: 8px;
}

h2 {
font-size: 1.4em;
margin-top: 25px;
margin-bottom: 15px;
padding-left: 10px;
border-left: 4px solid #4db6ac;
}

h3 {
font-size: 1.1em;
margin-top: 18px;
margin-bottom: 10px;
padding-left: 6px;
}

p, ul li, th, td {
font-size: 0.9em;
padding: 12px;
}

table {
margin: 20px 0;
}

.infographic-block {
padding: 15px;
margin: 25px 0;
border-right: 5px solid #00796b;
}
.infographic-block ul li {
padding-right: 20px;
margin-bottom: 12px;
}
.infographic-block ul li:before {
font-size: 1.1em;
}
}

“`