:root {
      --bg: #f6f7fb;
      --surface: #ffffff;
      --surface-2: #f1f3f8;
      --text: #1d2433;
      --muted: #687086;
      --border: #dde3ee;
      --accent: #2d5bff;
      --accent-soft: #eaf0ff;
      --max: 1180px;
      --content: 740px;
      --sidebar: 320px;
      --radius: 18px;
      --shadow: 0 10px 30px rgba(18, 31, 53, 0.08);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: var(--text);
      background: var(--bg);
      line-height: 1.7;
    }


    h2[id],
    h3[id] {
      scroll-margin-top: 120px;
    }


    img {
      max-width: 100%;
      display: block;
      border-radius: 14px;
    }

    a {
      color: var(--accent);
      text-decoration: none;
    }

    a:hover { text-decoration: underline; }

    .container {
      width: min(calc(100% - 32px), var(--max));
      margin: 0 auto;
    }

    .topbar {
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(10px);
      background: rgba(255,255,255,0.92);
      border-bottom: 1px solid rgba(221, 227, 238, 0.8);
    }

    .topbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: 68px;
    }

    /*.brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      color: var(--text);
      letter-spacing: -0.02em;
    }*/
    .logo {
      height: 70px;
      width: auto;
      display: block;
    }

    .brand {
      display: flex;
      align-items: center;
      text-decoration: none;
    }
    /*.brand-badge {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--accent), #7b92ff);
      color: white;
      font-size: 0.95rem;
      box-shadow: var(--shadow);
    }*/

    .top-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 14px;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: white;
      color: var(--text);
      font-weight: 600;
    }

    .btn--primary {
      background: var(--accent);
      border-color: var(--accent);
      color: white;
    }

    .hero {
      padding: 28px 0 18px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 18px;
    }

    .notice-ad,
    .inline-ad,
    .sidebar-ad,
    .mobile-sticky-ad,
    .infeed-ad {
      background: var(--surface);
      border: 1px dashed #b9c3d8;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .ad-label {
      display: inline-block;
      font-size: 0.72rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
      padding: 10px 14px 0;
    }

    .ad-box {
      min-height: 120px;
      display: grid;
      place-items: center;
      padding: 18px;
      color: var(--muted);
      text-align: center;
      font-size: 0.95rem;
    }

    .notice-ad .ad-box { min-height: 110px; }
    .inline-ad .ad-box { min-height: 220px; }
    .sidebar-ad .ad-box { min-height: 280px; }
    .infeed-ad .ad-box { min-height: 160px; }

    .layout {
      display: grid;
      grid-template-columns: minmax(0, var(--content)) minmax(280px, var(--sidebar));
      gap: 24px;
      align-items: start;
      padding-bottom: 100px;
    }

    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 24px;
      box-shadow: var(--shadow);
    }

    .article {
      padding: 28px;
    }

    .eyebrow {
      display: inline-flex;
      gap: 8px;
      align-items: center;
      background: var(--accent-soft);
      color: var(--accent);
      border-radius: 999px;
      padding: 8px 12px;
      font-size: 0.82rem;
      font-weight: 700;
    }

    h1 {
      margin: 16px 0 12px;
      font-size: clamp(2rem, 4vw, 3.35rem);
      line-height: 1.08;
      letter-spacing: -0.04em;
    }

    .subtitle {
      margin: 0 0 20px;
      color: var(--muted);
      font-size: 1.08rem;
      max-width: 62ch;
    }

    .meta {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      color: var(--muted);
      font-size: 0.94rem;
      padding-bottom: 18px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 22px;
    }

    .article p,
    .article li {
      font-size: 1.06rem;
      color: #273047;
    }

    .article h2,
    .article h3 {
      line-height: 1.18;
      letter-spacing: -0.03em;
      margin-top: 34px;
      margin-bottom: 12px;
    }

    .article h2 { font-size: 1.7rem; }
    .article h3 { font-size: 1.25rem; }

    .article blockquote {
      margin: 26px 0;
      padding: 18px 20px;
      background: var(--surface-2);
      border-left: 4px solid var(--accent);
      border-radius: 14px;
      color: #33405d;
    }

    .key-takeaways {
      margin: 24px 0;
      padding: 20px;
      border: 1px solid var(--border);
      background: linear-gradient(180deg, #fff, #fafbff);
      border-radius: 18px;
    }

    .key-takeaways h2 {
      margin-top: 0;
      font-size: 1.2rem;
    }

    .toc,
    .author-card,
    .newsletter,
    .trending,
    .widget {
      padding: 20px;
    }

    .sidebar {
      position: sticky;
      top: 92px;
      display: grid;
      gap: 18px;
    }

    .toc ul,
    .trending ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .toc li + li,
    .trending li + li {
      margin-top: 12px;
    }

    .toc a,
    .trending a {
      display: block;
      padding: 10px 12px;
      border-radius: 12px;
      color: var(--text);
      background: var(--surface-2);
      font-weight: 600;
    }

    .toc a:hover,
    .trending a:hover {
      background: var(--accent-soft);
      text-decoration: none;
    }

    .author-row {
      display: flex;
      gap: 14px;
      align-items: center;
    }

    .avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ced8ff, #eef2ff);
      display: grid;
      place-items: center;
      font-weight: 800;
      color: var(--accent);
      flex: 0 0 auto;
    }

    .newsletter form {
      display: grid;
      gap: 10px;
      margin-top: 14px;
    }

    input[type="email"] {
      width: 100%;
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 13px 14px;
      font: inherit;
      background: white;
    }

    .related-posts {
      margin-top: 28px;
      display: grid;
      gap: 16px;
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
    }

    .post-card {
      padding: 16px;
      border: 1px solid var(--border);
      border-radius: 18px;
      background: white;
    }

    .post-card p {
      font-size: 0.96rem;
      color: var(--muted);
      margin-bottom: 0;
    }

    .comments-cta {
      margin-top: 24px;
      padding: 18px 20px;
      border-radius: 18px;
      background: linear-gradient(180deg, #fff, #f6f8ff);
      border: 1px solid var(--border);
    }

    footer {
      padding: 28px 0 110px;
      color: var(--muted);
    }

    .mobile-sticky-ad {
      position: fixed;
      left: 12px;
      right: 12px;
      bottom: 12px;
      z-index: 60;
      display: none;
    }

    .mobile-sticky-ad .ad-box {
      min-height: 70px;
      padding: 10px 16px 14px;
    }

    .disclosure {
      margin: 18px 0 0;
      font-size: 0.86rem;
      color: var(--muted);
    }

    .contact-form {
      display: grid;
      gap: 12px;
      margin-top: 20px;
    }

    .contact-form label {
      font-weight: 600;
    }

    .contact-form input,
    .contact-form textarea {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: 12px;
      font: inherit;
      background: white;
    }

    .contact-form textarea {
      resize: vertical;
      min-height: 140px;
    }


    @media (max-width: 1040px) {
      .layout {
        grid-template-columns: 1fr;
      }

      .sidebar {
        position: static;
      }

      .related-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 720px) {
      .logo { height: 50px; }
      .article { padding: 20px; }
      .topbar-inner { min-height: 62px; }
      .top-actions .btn:not(.btn--primary) { display: none; }
      .related-grid { grid-template-columns: 1fr; }
      .mobile-sticky-ad { display: block; }
      footer { padding-bottom: 140px; }
    }