“`html

/* Base Styles for the entire article container */
.petroleum-thesis-container {
font-family: ‘Arial’, ‘Helvetica Neue’, ‘Helvetica’, sans-serif;
line-height: 1.7;
color: #333333;
max-width: 950px; /* Optimal width for readability */
margin: 0 auto; /* Center the content */
padding: 30px;
background-color: #ffffff; /* Clean white background */
border-radius: 12px;
box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08); /* Soft shadow for depth */
direction: rtl; /* Right-to-Left for Persian text */
text-align: right; /* Default text alignment */
}

/* Heading Styles */
.petroleum-thesis-container h1 {
font-size: 3em; /* Large, prominent title */
font-weight: 800;
color: #004d99; /* Deep, authoritative blue */
text-align: center; /* Center align for the main title */
margin-bottom: 45px;
line-height: 1.2;
padding-bottom: 20px;
border-bottom: 4px solid #0056B3; /* Strong blue underline */
}

.petroleum-thesis-container h2 {
font-size: 2.4em;
font-weight: 700;
color: #0056B3; /* Medium blue for main sections */
margin-top: 50px;
margin-bottom: 30px;
padding-bottom: 12px;
border-bottom: 2px solid #e0e0e0; /* Subtle grey underline */
text-align: right; /* Ensure H2s align right */
}

.petroleum-thesis-container h3 {
font-size: 1.9em;
font-weight: 600;
color: #28A745; /* Vibrant green for sub-sections, indicating progress/success */
margin-top: 35px;
margin-bottom: 20px;
text-align: right; /* Ensure H3s align right */
}

/* Paragraph Styles */
.petroleum-thesis-container p {
margin-bottom: 1.2em;
text-align: justify; /* Justified text for a formal look */
}

/* List Styles */
.petroleum-thesis-container ul,
.petroleum-thesis-container ol {
margin-right: 30px; /* Indent for RTL */
margin-left: 0;
margin-bottom: 1.5em;
padding: 0;
}

.petroleum-thesis-container ul li,
.petroleum-thesis-container ol li {
margin-bottom: 0.8em;
padding-right: 5px; /* Small padding for bullet points */
}

/* Table of Contents (Simulated) Styles */
.petroleum-thesis-toc {
background-color: #f0f8ff; /* Very light blue background */
border: 1px solid #cceeff; /* Light blue border */
padding: 25px;
margin: 40px 0;
border-radius: 8px;
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.petroleum-thesis-toc h3 {
color: #0056B3;
margin-top: 0;
margin-bottom: 15px;
border-bottom: 1px dashed #cceeff;
padding-bottom: 12px;
font-size: 1.8em;
font-weight: 600;
text-align: right;
}

.petroleum-thesis-toc ul {
list-style-type: none; /* Remove default bullet points */
padding: 0;
margin: 0;
}

.petroleum-thesis-toc ul li a {
color: #007bff; /* Standard link blue */
text-decoration: none;
padding: 10px 0;
display: block;
transition: color 0.3s ease, padding-right 0.3s ease;
text-align: right;
}

.petroleum-thesis-toc ul li a:hover {
color: #004d99; /* Darker blue on hover */
text-decoration: underline;
padding-right: 8px; /* Slight visual feedback on hover */
}
.petroleum-thesis-toc ul ul { /* Nested list for sub-sections in TOC */
margin-right: 20px;
margin-top: 5px;
}
.petroleum-thesis-toc ul ul li a {
font-size: 0.95em;
color: #444;
}
.petroleum-thesis-toc ul ul li a:hover {
color: #007bff;
}

/* Table Styles */
.petroleum-thesis-table {
width: 100%;
border-collapse: collapse;
margin: 40px 0;
box-shadow: 0 3px 12px rgba(0, 0, 0, 0.06);
border-radius: 8px; /* Rounded corners for the table */
overflow: hidden; /* Ensures rounded corners are visible */
}

.petroleum-thesis-table th,
.petroleum-thesis-table td {
border: 1px solid #e9ecef; /* Light border for cells */
padding: 15px 18px;
text-align: right; /* Align table content to the right */
}

.petroleum-thesis-table th {
background-color: #e9f5ff; /* Light blue header background */
color: #0056B3;
font-weight: 600;
font-size: 1.1em;
}

.petroleum-thesis-table tr:nth-child(even) {
background-color: #f8faff; /* Lighter alternating row color */
}

.petroleum-thesis-table tr:hover {
background-color: #eef7ff; /* Subtle highlight on row hover */
}

/* Infographic Alternative Styles */
.infographic-box {
background-color: #e8f8f0; /* Light green background */
border-right: 6px solid #28A745; /* Prominent green border on right */
padding: 30px;
margin: 45px 0;
border-radius: 10px;
box-shadow: 0 5px 15px rgba(0, 0, 0, 0.07);
}

.infographic-box h3 {
color: #1e7e34; /* Darker green for infographic title */
margin-top: 0;
margin-bottom: 25px;
font-size: 1.7em;
font-weight: 700;
border-bottom: 1px dashed #a3e6b7; /* Dashed line for subtle separation */
padding-bottom: 10px;
}

.infographic-item {
margin-bottom: 20px;
padding-right: 40px; /* Space for the custom bullet */
position: relative;
}

.infographic-item::before {
content: “✔”; /* Custom checkmark symbol */
color: #28A745; /* Green checkmark */
font-weight: bold;
position: absolute;
right: 0; /* Align to the right for RTL */
top: 2px;
font-size: 1.3em;
}
.infographic-box p {
margin-bottom: 0.5em;
text-align: right; /* Ensure infographic text aligns right */
}

/* FAQ Section Styles */
.faq-item {
background-color: #fefefe; /* Near white background */
border: 1px solid #e0e0e0;
border-radius: 8px;
margin-bottom: 20px;
padding: 25px;
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.faq-question {
font-weight: 700;
color: #0056B3;
margin-bottom: 12px;
font-size: 1.2em;
text-align: right;
}

.faq-answer {
color: #555;
font-size: 1em;
text-align: justify;
}

/* Responsive Adjustments */
@media (max-width: 1200px) {
.petroleum-thesis-container {
max-width: 90%;
}
}

@media (max-width: 768px) {
.petroleum-thesis-container {
padding: 20px;
}
.petroleum-thesis-container h1 {
font-size: 2.5em;
margin-bottom: 35px;
}
.petroleum-thesis-container h2 {
font-size: 2em;
margin-top: 40px;
margin-bottom: 25px;
}
.petroleum-thesis-container h3 {
font-size: 1.6em;
margin-top: 30px;
margin-bottom: 18px;
}
.petroleum-thesis-table th,
.petroleum-thesis-table td {
padding: 12px 15px;
font-size: 0.95em;
}
.infographic-box {
padding: 25px;
}
.infographic-box h3 {
font-size: 1.5em;
}
}

@media (max-width: 480px) {
.petroleum-thesis-container {
padding: 15px;
border-radius: 0; /* No rounded corners on very small screens */
box-shadow: none; /* No shadow */
}
.petroleum-thesis-container h1 {
font-size: 2em;
margin-bottom: 25px;
padding-bottom: 15px;
border-bottom-width: 3px;
}
.petroleum-thesis-container h2 {
font-size: 1.7em;
margin-top: 30px;
margin-bottom: 20px;
padding-bottom: 10px;
}
.petroleum-thesis-container h3 {
font-size: 1.4em;
margin-top: 25px;
margin-bottom: 15px;
}
.petroleum-thesis-table {
display: block;
border-radius: 0;
box-shadow: none;
}
.petroleum-thesis-table thead {
display: none; /* Hide header on mobile */
}
.petroleum-thesis-table tbody,
.petroleum-thesis-table tr,
.petroleum-thesis-table td {
display: block;
width: 100%;
}
.petroleum-thesis-table tr {
margin-bottom: 15px;
border: 1px solid #e0e0e0;
border-radius: 8px;
overflow: hidden;
}
.petroleum-thesis-table td {
text-align: right;
border: none;
border-bottom: 1px solid #f0f0f0;
position: relative;
padding-right: 15px;
padding-left: 50%; /* Space for data-label */
}
.petroleum-thesis-table td:last-child {
border-bottom: none;
}
.petroleum-thesis-table td::before {
content: attr(data-label); /* Use data-label for responsive headers */
position: absolute;
right: 15px;
top: 50%;
transform: translateY(-50%);
font-weight: bold;
width: 45%;
text-align: right;
color: #777;
font-size: 0.9em;
}
.infographic-box {
padding: 20px;
border-right-width: 4px;
}
.infographic-box h3 {
font-size: 1.3em;
}
.infographic-item {
padding-right: 30px;
}
.infographic-item::before {
right: 5px;
font-size: 1.1em;
}
.faq-item {
padding: 20px;
}
.faq-question {
font-size: 1.1em;
}
}

“`