:root {
     --primary-color: #4361ee;
     --secondary-color: #3a0ca3;
     --accent-color: #4cc9f0;
     --light-bg: #f8f9fa;
     --dark-text: #212529;
     --light-text: #6c757d;
 }
 
 body {
     font-family: 'Open Sans', sans-serif;
     color: var(--dark-text);
     line-height: 1.7;
     background-color: #fff;
     padding-top: 56px;
 }
 
 h1, h2, h3, h4, h5 {
     font-family: 'Poppins', sans-serif;
     font-weight: 600;
 }
 
 .hero-image {
     background: linear-gradient(rgba(67, 97, 238, 0.7), rgba(58, 12, 163, 0.7)), 
   url('https://images.unsplash.com/photo-1620712943543-bcc4688e7485?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
     background-size: cover;
     background-position: center;
     height: 400px;
     display: flex;
     align-items: center;
     justify-content: center;
     margin-bottom: 2rem;
     border-radius: 0 0 20px 20px;
     box-shadow: 0 10px 30px rgba(0,0,0,0.1);
 }
 
 .hero-title {
     color: white;
     font-size: 3.5rem;
     text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
     text-align: center;
     max-width: 800px;
     padding: 0 20px;
 }
 
 article {
     max-width: 900px;
     margin: 0 auto 4rem auto;
     padding: 0 20px;
 }
 
 .article-intro {
     font-size: 1.25rem;
     color: var(--secondary-color);
     font-weight: 500;
     margin-bottom: 2rem;
     border-left: 4px solid var(--accent-color);
     padding-left: 1.5rem;
 }
 
 .section-title {
     color: var(--secondary-color);
     padding-bottom: 0.5rem;
     margin-top: 2.5rem;
     margin-bottom: 1.5rem;
     border-bottom: 2px solid #e9ecef;
     position: relative;
 }
 
 .section-title:after {
     content: '';
     position: absolute;
     bottom: -2px;
     left: 0;
     width: 80px;
     height: 2px;
     background-color: var(--accent-color);
 }
 
 .highlight-box {
     background-color: var(--light-bg);
     border-left: 4px solid var(--primary-color);
     padding: 1.5rem;
     margin: 1.5rem 0;
     border-radius: 0 8px 8px 0;
 }
 
 .fun-fact {
     background-color: #e8f4fc;
     border-radius: 10px;
     padding: 1.5rem;
     margin: 2rem 0;
     border-left: 5px solid var(--accent-color);
 }
 
 .fun-fact h5 {
     color: var(--secondary-color);
     margin-bottom: 0.5rem;
 }
 
 .fun-fact i {
     color: var(--accent-color);
     margin-right: 10px;
 }
 
 .ai-example {
     background-color: white;
     border-radius: 10px;
     padding: 1.5rem;
     margin: 1.5rem 0;
     box-shadow: 0 5px 15px rgba(0,0,0,0.05);
     border-top: 3px solid var(--primary-color);
 }
 
 .ai-example i {
     color: var(--primary-color);
     font-size: 1.5rem;
     margin-bottom: 1rem;
 }
 
 .conclusion {
     background: linear-gradient(to right, #4361ee, #3a0ca3);
     color: white;
     padding: 2.5rem;
     border-radius: 15px;
     margin: 3rem 0;
     box-shadow: 0 10px 30px rgba(67, 97, 238, 0.2);
 }
 
 .conclusion h3 {
     color: white;
 }
 
 footer {
     background-color: var(--dark-text);
     color: white;
     padding: 2rem 0;
     margin-top: 3rem;
     text-align: center;
 }
 
 .social-icons a {
     color: white;
     margin: 0 10px;
     font-size: 1.2rem;
     transition: color 0.3s;
 }
 
 .social-icons a:hover {
     color: var(--accent-color);
 }
 
 .quote {
     font-style: italic;
     font-size: 1.2rem;
     color: var(--secondary-color);
     text-align: center;
     padding: 2rem;
     margin: 2rem 0;
     position: relative;
 }
 
 .quote:before, .quote:after {
     content: '"';
     font-size: 3rem;
     color: var(--accent-color);
     opacity: 0.3;
     position: absolute;
 }
 
 .quote:before {
     top: 0;
     left: 10px;
 }
 
 .quote:after {
     bottom: -20px;
     right: 10px;
 }
 
 @media (max-width: 768px) {
     .hero-title {
  font-size: 2.5rem;
     }
     
     .hero-image {
  height: 300px;
     }
     
     article {
  padding: 0 15px;
     }
 }
 
 .back-to-top {
     position: fixed;
     bottom: 30px;
     right: 30px;
     background-color: var(--primary-color);
     color: white;
     width: 50px;
     height: 50px;
     border-radius: 50%;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 1.2rem;
     box-shadow: 0 5px 15px rgba(0,0,0,0.2);
     z-index: 100;
     transition: all 0.3s;
     text-decoration: none;
 }
 
 .back-to-top:hover {
     background-color: var(--secondary-color);
     color: white;
     transform: translateY(-5px);
 }