/* ----- RESET & BASE ----- */
       * {
           margin: 0;
           padding: 0;
           box-sizing: border-box;
       }

       body {
           font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
           background: #f8fafc;
           color: #0b1a2e;
           line-height: 1.7;
           padding: 2rem 1rem;
           display: flex;
           justify-content: center;
       }

       /* main container – max-width for readability */
       .blog-container {
           max-width: 820px;
           width: 100%;
           background: #ffffff;
           border-radius: 32px;
           box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.08), 0 8px 24px -6px rgba(0, 20, 40, 0.04);
           padding: 2.5rem 2.8rem;
           transition: box-shadow 0.2s;
       }

       /* ----- TYPOGRAPHY & SPACING (SEO-friendly hierarchy) ----- */
       h1 {
           font-size: 2.6rem;
           font-weight: 700;
           letter-spacing: -0.02em;
           line-height: 1.2;
           margin-top: 0.2rem;
           margin-bottom: 0.4rem;
           color: #0b1a2e;
       }

       .post-meta {
           display: flex;
           flex-wrap: wrap;
           align-items: center;
           gap: 0.75rem 1.2rem;
           font-size: 0.95rem;
           color: #4a5a6e;
           border-bottom: 1px solid #e9edf2;
           padding-bottom: 1.2rem;
           margin-bottom: 1.8rem;
       }

       .post-meta .author {
           font-weight: 600;
           color: #1a2c42;
       }

       .post-meta .date {
           display: flex;
           align-items: center;
           gap: 4px;
       }

       .post-meta .reading-time {
           background: #eef2f6;
           padding: 0.2rem 0.8rem;
           border-radius: 40px;
           font-size: 0.85rem;
           font-weight: 500;
           color: #1f3a57;
       }

       /* featured image placeholder */
       .featured-image {
           background: #e6edf5;
           height: 350px;
           display: flex;
           align-items: center;
           justify-content: center;
           margin-bottom: 2rem;
           color: #1f3a57;
           overflow: hidden;
       }

       .featured-image img {
           max-width: 100%;
       }

       /* content headings – semantic hierarchy */
       h2 {
           font-size: 1.9rem;
           font-weight: 650;
           letter-spacing: -0.01em;
           margin-top: 2.8rem;
           margin-bottom: 0.8rem;
           color: #0b1a2e;
           border-left: 5px solid #3b6ea5;
           padding-left: 1rem;
       }

       h3 {
           font-size: 1.4rem;
           font-weight: 600;
           margin-top: 2rem;
           margin-bottom: 0.5rem;
           color: #1a3350;
       }

       p {
           margin-bottom: 1.4rem;
           color: #1f2f44;
       }

       ul,
       ol {
           margin: 0.8rem 0 1.6rem 1.8rem;
       }

       li {
           margin-bottom: 0.45rem;
       }

       blockquote {
           border-left: 6px solid #3b6ea5;
           background: #f2f6fc;
           padding: 1.2rem 2rem;
           margin: 2rem 0;
           border-radius: 12px 20px 20px 12px;
           font-style: italic;
           color: #1a2f47;
           font-size: 1.1rem;
           box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
       }

       blockquote cite {
           display: block;
           margin-top: 0.5rem;
           font-style: normal;
           font-weight: 500;
           color: #3b5a7a;
           font-size: 0.95rem;
       }

       /* inline code / highlight */
       code {
           background: #eef3f9;
           padding: 0.15rem 0.5rem;
           border-radius: 6px;
           font-family: 'Fira Code', 'Cascadia Code', monospace;
           font-size: 0.9em;
           color: #1e3b5c;
       }

       .img-container {
           overflow: hidden;
       }

       .img-container img {
           border: 2px solid #0b1a2e;
           max-width: 100%;
           border-radius: 20px;
       }

       pre {
           background: #0e1a2b;
           color: #e3eaf3;
           padding: 1.5rem;
           border-radius: 18px;
           overflow-x: auto;
           margin: 1.8rem 0;
           font-size: 0.9rem;
           line-height: 1.5;
           border: 1px solid #243854;
       }

       pre code {
           background: transparent;
           color: #d6e4f0;
           padding: 0;
           font-size: 0.9rem;
       }

       /* table – clean and readable */
       table {
           width: 100%;
           border-collapse: collapse;
           margin: 2rem 0;
           font-size: 0.95rem;
           border-radius: 14px;
           overflow: hidden;
           box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
       }

       th {
           background: #e9eff6;
           text-align: left;
           padding: 0.9rem 1.2rem;
           font-weight: 600;
           color: #0b1e33;
       }

       td {
           padding: 0.8rem 1.2rem;
           border-bottom: 1px solid #e3eaf2;
           background: #fafcff;
       }

       tr:last-child td {
           border-bottom: none;
       }

       /* tags / categories */
       .tags {
           display: flex;
           flex-wrap: wrap;
           gap: 0.5rem 0.7rem;
           margin: 2.4rem 0 1.2rem 0;
           border-top: 1px solid #e6ecf3;
           padding-top: 2rem;
       }

       .tag {
           background: #ecf2f9;
           padding: 0.25rem 1rem;
           border-radius: 40px;
           font-size: 0.8rem;
           font-weight: 500;
           color: #1a3b5c;
           letter-spacing: 0.2px;
           text-decoration: none;
           transition: background 0.2s;
       }

       .tag:hover {
           background: #d6e2f0;
       }

       /* author bio box – rich snippet friendly */
       .author-bio {
           background: #f2f7fe;
           border-radius: 24px;
           padding: 1.6rem 2rem;
           margin: 2.8rem 0 1.2rem;
           display: flex;
           flex-wrap: wrap;
           align-items: center;
           gap: 1.5rem;
           border: 1px solid #deeaf6;
       }

       .author-avatar {
           width: 70px;
           height: 70px;
           border-radius: 50%;
           background: #3b6ea5;
           display: flex;
           align-items: center;
           justify-content: center;
           color: white;
           font-weight: 600;
           font-size: 1.8rem;
           flex-shrink: 0;
       }

       .author-bio-content {
           flex: 1;
       }

       .author-bio-content h4 {
           font-size: 1.2rem;
           font-weight: 600;
           margin-bottom: 0.2rem;
           color: #0b1e33;
       }

       .author-bio-content p {
           margin-bottom: 0.2rem;
           color: #1f3a57;
       }

       .author-bio-content .bio-social a {
           color: #2a5c8a;
           text-decoration: none;
           font-weight: 500;
           margin-right: 1rem;
           font-size: 0.9rem;
       }

       .author-bio-content .bio-social a:hover {
           text-decoration: underline;
       }

       /* responsive */
       @media (max-width: 640px) {
           .blog-container {
               padding: 1.5rem 1.2rem;
               border-radius: 24px;
           }

           h1 {
               font-size: 2rem;
           }

           h2 {
               font-size: 1.6rem;
               padding-left: 0.8rem;
           }

           h3 {
               font-size: 1.25rem;
           }

           .featured-image {
               height: 150px;
           }

           .post-meta {
               flex-direction: column;
               align-items: flex-start;
               gap: 0.3rem;
           }

           .author-bio {
               flex-direction: column;
               text-align: center;
               padding: 1.5rem;
           }

           blockquote {
               padding: 1rem 1.2rem;
           }
       }

       @media (max-width: 420px) {
           .blog-container {
               padding: 1rem 0.8rem;
           }

           h1 {
               font-size: 1.7rem;
           }

           .featured-image {
               height: 120px;
               font-size: 0.9rem;
           }
       }