:root {
      --primary: #1D7BFF;
      --primary-hover: #0056D2;
      --bg-dark: #0A0F1D;
      --bg-card: #141B2D;
      --bg-light: #F4F7FC;
      --text-white: #FFFFFF;
      --text-gray: #94A3B8;
      --text-dark: #0F172A;
      --border-color: rgba(255, 255, 255, 0.1);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: var(--font-family); background-color: var(--bg-light); color: var(--text-dark); line-height: 1.6; }

    
    .header {
      background-color: var(--bg-dark);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
      padding: 15px 0;
    }

    .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
    .header-container { display: flex; justify-content: space-between; align-items: center; }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .logo img {
      display: block;
      height: 40px;
      width: auto;
      max-width: 160px;
      object-fit: contain;
      flex-shrink: 0;
    }

    .logo span {
      display: inline-block;
      font-size: 20px;
      font-weight: 800;
      line-height: 1;
      color: var(--text-white);
      white-space: nowrap;
    }

    .nav-menu { display: flex; gap: 24px; align-items: center; }
    .nav-menu a { color: var(--text-gray); text-decoration: none; font-size: 15px; font-weight: 500; transition: color 0.3s; }
    .nav-menu a:hover { color: var(--primary); }
    .menu-toggle { display: none; background: none; border: none; color: var(--text-white); font-size: 24px; cursor: pointer; }

    
    .drawer { position: fixed; top: 0; left: -100%; width: 280px; height: 100%; background-color: var(--bg-dark); z-index: 1100; transition: left 0.3s ease; padding: 30px 20px; display: flex; flex-direction: column; gap: 30px; box-shadow: 5px 0 15px rgba(0,0,0,0.5); }
    .drawer.active { left: 0; }
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 1050; display: none; }
    .drawer-overlay.active { display: block; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; }
    .drawer-close { background: none; border: none; color: var(--text-white); font-size: 28px; cursor: pointer; }
    .drawer-menu { display: flex; flex-direction: column; gap: 20px; }
    .drawer-menu a { color: var(--text-gray); text-decoration: none; font-size: 18px; font-weight: 500; }
    .drawer-menu a:hover { color: var(--primary); }

    
    .breadcrumbs-box {
      padding: 20px 0;
      font-size: 14px;
      color: #64748B;
    }

    .breadcrumbs-box a {
      color: #64748B;
      text-decoration: none;
    }

    .breadcrumbs-box a:hover {
      color: var(--primary);
    }

    
    .article-layout {
      display: grid;
      grid-template-columns: 3fr 1fr;
      gap: 40px;
      margin-bottom: 60px;
    }

    .article-main {
      background-color: var(--text-white);
      border-radius: 12px;
      padding: 40px;
      border: 1px solid #E2E8F0;
    }

    .article-header {
      border-bottom: 1px solid #E2E8F0;
      padding-bottom: 24px;
      margin-bottom: 30px;
    }

    .article-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 15px;
      line-height: 1.3;
    }

    .article-meta-info {
      display: flex;
      gap: 20px;
      font-size: 14px;
      color: #64748B;
      flex-wrap: wrap;
    }

    .article-meta-info span {
      display: flex;
      align-items: center;
      gap: 5px;
    }

    
    .article-body {
      font-size: 16px;
      color: #334155;
      line-height: 1.8;
    }

    .article-body p {
      margin-bottom: 20px;
    }

    .article-body img {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      margin: 20px 0;
    }

    
    .post-nav {
      border-top: 1px solid #E2E8F0;
      padding-top: 30px;
      margin-top: 50px;
      display: flex;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }

    .post-nav-item {
      max-width: 48%;
    }

    .post-nav-item span {
      font-size: 12px;
      color: #64748B;
      display: block;
      margin-bottom: 5px;
    }

    .post-nav-item a {
      color: var(--text-dark);
      text-decoration: none;
      font-weight: 600;
    }

    .post-nav-item a:hover {
      color: var(--primary);
    }

    
    .related-section {
      margin-top: 60px;
    }

    .related-title {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 25px;
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .related-card {
      background-color: var(--text-white);
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid #E2E8F0;
    }

    .related-card img {
      width: 100%;
      height: 130px;
      object-fit: cover;
      background-color: #F1F5F9;
    }

    .related-card-info {
      padding: 15px;
    }

    .related-card-info h4 {
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .related-card-info h4 a {
      color: var(--text-dark);
      text-decoration: none;
    }

    
    .footer {
      background-color: var(--bg-dark);
      color: var(--text-gray);
      padding: 60px 0 30px 0;
      border-top: 1px solid var(--border-color);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 50px;
      margin-bottom: 40px;
    }

    .footer-brand .logo { margin-bottom: 20px; }
    .footer-brand p { font-size: 14px; line-height: 1.8; }
    .footer-links h4 { color: var(--text-white); margin-bottom: 20px; font-size: 16px; }
    .footer-links ul { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { color: var(--text-gray); text-decoration: none; font-size: 14px; transition: color 0.3s; }
    .footer-links a:hover { color: var(--primary); }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 30px; text-align: center; font-size: 13px; }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .article-layout { grid-template-columns: 1fr; }
      .related-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }