*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      background: #e9e9e9;
      font-family: 'Lora', serif;
      color: #1f1f1f;
      min-height: 100vh;
      padding: 36px 16px 48px;
    }

    a { color: #4880b8; text-decoration: none; }
    a:hover { text-decoration: underline; }

    .card {
      max-width: 1080px;
      margin: 0 auto;
      background: #ffffff;
      box-shadow: 0 1px 6px rgba(0, 0, 0, 0.10);
    }

    .card-header {
      padding: 30px 40px 26px;
      border-bottom: 2px solid #1f1f1f;
    }

    .blog-title {
      font-size: 1.85rem;
      font-weight: 600;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }

    .blog-title a { color: #1f1f1f; }
    .blog-title a:hover { color: #4880b8; text-decoration: none; }

    .blog-subtitle {
      margin-top: 6px;
      font-size: 0.9rem;
      font-style: italic;
      color: #777;
    }

    .card-nav {
      padding: 0 40px;
      border-bottom: 1px solid #d0d0d0;
      display: flex;
      flex-wrap: wrap;
      gap: 0;
    }

    .card-nav a {
      display: inline-block;
      padding: 9px 0;
      margin-right: 18px;
      font-size: 0.83rem;
      color: #4880b8;
    }

    .card-nav a:hover { text-decoration: underline; }
    .card-nav a.active { color: #1f1f1f; font-weight: 600; text-decoration: none; cursor: default; }

    .card-body {
      display: flex;
      align-items: flex-start;
    }

    .card-main {
      flex: 1 1 0%;
      min-width: 0;
      padding: 38px 40px 40px;
      border-right: 1px solid #d0d0d0;
    }

    .post-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 0.8rem;
      color: #888;
      margin-bottom: 10px;
    }

    .post-cat-tag {
      background: #edf2fa;
      color: #4880b8;
      padding: 2px 9px;
      font-size: 0.74rem;
      border-radius: 2px;
      font-style: normal;
    }

    .post-cat-tag:hover { background: #d7e4f5; text-decoration: none; }

    .post-title {
      font-size: 1.65rem;
      font-weight: 600;
      line-height: 1.28;
      letter-spacing: -0.015em;
      margin-bottom: 20px;
    }

    .post-title a { color: #1f1f1f; }
    .post-title a:hover { color: #4880b8; text-decoration: none; }

    .post-content {
      font-size: 1rem;
      line-height: 1.8;
      color: #1f1f1f;
    }

    .post-content p         { margin-bottom: 1.25em; }
    .post-content p:last-child { margin-bottom: 0; }
    .post-content h2        { font-size: 1.15rem; font-weight: 600; margin: 1.6em 0 0.6em; }
    .post-content h3        { font-size: 1rem; font-weight: 600; margin: 1.4em 0 0.5em; }
    .post-content blockquote {
      border-left: 3px solid #d0d0d0;
      padding-left: 18px;
      margin: 1.4em 0;
      font-style: italic;
      color: #555;
    }
    .post-content ul, .post-content ol {
      padding-left: 22px;
      margin-bottom: 1.25em;
    }
    .post-content li { margin-bottom: 0.4em; }
    .post-content a  { color: #4880b8; }

    .older-posts {
      margin-top: 38px;
      padding-top: 28px;
      border-top: 1px solid #e0e0e0;
    }

    .section-label {
      font-size: 0.68rem;
      font-weight: 600;
      letter-spacing: 0.13em;
      text-transform: uppercase;
      color: #aaa;
      margin-bottom: 14px;
    }

    .post-list-item {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 16px;
      padding: 9px 0;
      border-bottom: 1px solid #ebebeb;
    }

    .post-list-item:last-child { border-bottom: none; }

    .post-list-title {
      font-size: 0.95rem;
      color: #4880b8;
      line-height: 1.4;
    }

    .post-list-date {
      font-size: 0.76rem;
      color: #bbb;
      white-space: nowrap;
      flex-shrink: 0;
    }

    .back-link {
      display: inline-block;
      font-size: 0.82rem;
      color: #4880b8;
      margin-bottom: 28px;
    }

    .category-posts-title {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 20px;
      color: #1f1f1f;
    }

    .card-sidebar {
      width: 230px;
      flex-shrink: 0;
      padding: 38px 28px 40px;
    }

    .sidebar-block { margin-bottom: 30px; }

    .sidebar-label {
      font-size: 0.68rem;
      font-weight: 600;
      letter-spacing: 0.13em;
      text-transform: uppercase;
      color: #aaa;
      margin-bottom: 12px;
      padding-bottom: 7px;
      border-bottom: 1px solid #e0e0e0;
    }

    .cat-list { list-style: none; }

    .cat-list li {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 6px 0;
      border-bottom: 1px solid #f0f0f0;
    }

    .cat-list li:last-child { border-bottom: none; }

    .cat-list a { font-size: 0.88rem; color: #4880b8; }
    .cat-list a:hover { text-decoration: underline; }

    .cat-count {
      font-size: 0.74rem;
      color: #ccc;
    }

    .state-msg {
      font-size: 0.88rem;
      color: #aaa;
      font-style: italic;
    }

    .card-footer {
      border-top: 1px solid #d0d0d0;
      padding: 14px 40px;
      font-size: 0.76rem;
      color: #c0c0c0;
      text-align: center;
    }

    @media (max-width: 720px) {
      body { padding: 0 0 32px; }
      .card { box-shadow: none; }
      .card-header { padding: 22px 20px 18px; }
      .card-nav { padding: 0 20px; }
      .card-body { flex-direction: column; }
      .card-main { padding: 26px 20px 30px; border-right: none; border-bottom: 1px solid #d0d0d0; }
      .card-sidebar { width: 100%; padding: 24px 20px 8px; }
      .card-footer { padding: 14px 20px; }
    }