body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f8f9fa;
  color: #333;
  line-height: 1.8;
  margin: 0;
  padding: 0;
}

/* =========================================
   HERO SECTION
========================================= */

.article-hero {
  background: linear-gradient(135deg, #0a2540, #1e3c72);
  color: #ffffff;
  padding: 90px 20px;
  text-align: center;
}

.article-hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.article-meta {
  opacity: 0.85;
  margin-top: 10px;
  font-size: 15px;
}

/* =========================================
   MAIN ARTICLE CONTAINER
========================================= */

.article-container {
  margin-top: -40px;
  margin-bottom: 50px;
}

.article-content {
  background: #ffffff;
  padding: 40px;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* =========================================
   TYPOGRAPHY
========================================= */

.article-content h2 {
  color: #0a2540;
  margin-top: 45px;
  margin-bottom: 18px;
  font-size: 2rem;
  font-weight: 700;
  border-bottom: 2px solid #e9eef5;
  padding-bottom: 10px;
}

.article-content h3 {
  color: #1e3c72;
  margin-top: 35px;
  margin-bottom: 14px;
  font-size: 1.45rem;
  font-weight: 600;
}

.article-content p {
  line-height: 1.8;
  color: #333;
  margin-bottom: 20px;
  font-size: 16px;
}

.article-content ul,
.article-content ol {
  margin-left: 20px;
  margin-bottom: 25px;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.7;
}

/* =========================================
   IMAGE
========================================= */

.article-content img {
  width: 100%;
  border-radius: 10px;
  margin: 25px 0;
  display: block;
}

/* =========================================
   BLOCKQUOTE
========================================= */

.article-content blockquote {
  border-left: 4px solid #1e3c72;
  padding: 15px 20px;
  color: #555;
  font-style: italic;
  margin: 30px 0;
  background: #f3f7fc;
  border-radius: 6px;
}

/* =========================================
   CODE BLOCKS
========================================= */

pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 22px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 25px 0;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
}

code {
  font-family: Consolas, monospace;
  font-size: 14px;
  line-height: 1.6;
}

/* =========================================
   INFO BOX
========================================= */

.info-box {
  background: #eef4ff;
  border-left: 5px solid #2563eb;
  padding: 22px;
  margin: 30px 0;
  border-radius: 8px;
  color: #1e293b;
}

/* =========================================
   SIDEBAR
========================================= */

.sidebar {
  background: #ffffff;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

.sidebar h5 {
  color: #0a2540;
  margin-bottom: 15px;
  font-weight: 700;
}

.sidebar ul {
  padding-left: 18px;
}

.sidebar li {
  margin-bottom: 10px;
}

/* =========================================
   CTA SECTION
========================================= */

.cta-section {
  background: linear-gradient(135deg, #0f172a, #1e3a8a);
  color: #ffffff;
  padding: 55px 30px;
  border-radius: 16px;
  text-align: center;
  margin-top: 45px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

.cta-section h2 {
  font-size: 32px;
  margin-bottom: 15px;
  font-weight: 700;
}

.cta-section p {
  font-size: 17px;
  margin-bottom: 28px;
  opacity: 0.92;
}

.cta-button {
  display: inline-block;
  padding: 14px 32px;
  background: #38bdf8;
  color: #0f172a;
  text-decoration: none;
  font-weight: 700;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.cta-button:hover {
  background: #0ea5e9;
  color: #ffffff;
  transform: translateY(-2px);
}

/* =========================================
   FOOTER
========================================= */

footer {
  background: #0a2540;
  color: #ffffff;
  padding: 25px 20px;
  text-align: center;
  margin-top: 60px;
}

footer p {
  margin: 0;
  opacity: 0.9;
}

/* =========================================
   RESPONSIVE DESIGN
========================================= */

@media (max-width: 992px) {

  .article-content {
    padding: 30px;
  }

  .article-hero h1 {
    font-size: 2.4rem;
  }

}

@media (max-width: 768px) {

  .article-hero {
    padding: 70px 20px;
  }

  .article-hero h1 {
    font-size: 2rem;
    line-height: 1.3;
  }

  .article-content {
    padding: 25px;
  }

  .article-content h2 {
    font-size: 1.7rem;
  }

  .article-content h3 {
    font-size: 1.3rem;
  }

  .cta-section {
    padding: 45px 20px;
  }

  .cta-section h2 {
    font-size: 28px;
  }

}

@media (max-width: 576px) {

  .article-content {
    padding: 20px;
  }

  .article-hero h1 {
    font-size: 1.7rem;
  }

  .article-content h2 {
    font-size: 1.5rem;
  }

  .article-content h3 {
    font-size: 1.2rem;
  }

  pre {
    padding: 18px;
  }

  code {
    font-size: 13px;
  }

}