/* ── HERO ─────────────────────────────────────────────────── */
    .post-hero {
      padding-top: calc(80px + clamp(32px, 8vw, 64px));
      padding-bottom: clamp(32px, 6vw, 56px);
      background: var(--color-surface-subtle);
      position: relative;
      overflow: hidden;
    }
    .post-hero::before {
      content: '';
      position: absolute;
      top: -20%;
      right: -8%;
      width: 50vw;
      height: 50vw;
      max-width: 600px;
      background: radial-gradient(circle, rgba(77,182,172,0.14) 0%, transparent 70%);
      pointer-events: none;
    }
    .post-hero__inner { position: relative; z-index: 1; max-width: 72ch; }
    .post-back {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-family: 'Montserrat', sans-serif;
      font-size: 0.82rem;
      font-weight: 600;
      color: #4DB6AC;
      text-decoration: none;
      margin-bottom: 28px;
      opacity: 0.85;
      transition: opacity 0.15s, gap 0.15s;
    }
    .post-back:hover { opacity: 1; gap: 10px; }
    .post-back::before { content: '←'; }
    .post-cat {
      display: inline-block;
      font-family: 'Montserrat', sans-serif;
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: #4DB6AC;
      background: rgba(77,182,172,0.12);
      border: 1px solid rgba(77,182,172,0.25);
      border-radius: 100px;
      padding: 4px 12px;
      margin-bottom: 18px;
      display: block;
    }
    .post-title {
      font-family: 'Montserrat', sans-serif;
      font-size: clamp(1.6rem, 4vw, 2.5rem);
      font-weight: 800;
      color: #264653;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin: 0 0 18px;
    }
    .post-meta {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.85rem;
      color: #7a9aaa;
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .post-meta__dot { color: rgba(77,182,172,0.5); }

    /* ── COVER IMAGE ──────────────────────────────────────────── */
    .post-cover {
      width: 100%;
      max-height: 480px;
      object-fit: cover;
      border-radius: 20px;
      display: block;
      margin: 40px 0;
    }
    .post-cover-placeholder {
      background: rgba(77,182,172,0.1);
      border-radius: 20px;
      height: 320px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: rgba(77,182,172,0.35);
      margin: 40px 0;
    }
    .post-cover-placeholder svg { width: 64px; height: 64px; }

    /* ── ARTICLE BODY ─────────────────────────────────────────── */
    .post-layout {
      display: grid;
      grid-template-columns: 1fr 280px;
      gap: 56px;
      align-items: start;
      padding-bottom: 80px;
    }
    .post-content {
      font-family: 'Montserrat', sans-serif;
      font-size: 1rem;
      line-height: 1.8;
      color: #2d4a56;
      min-width: 0;
    }
    .post-content h2 {
      font-size: 1.4rem;
      font-weight: 800;
      color: #264653;
      margin: 2em 0 0.6em;
      line-height: 1.2;
    }
    .post-content h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #264653;
      margin: 1.6em 0 0.5em;
    }
    .post-content p { margin: 0 0 1.2em; }
    .post-content ul, .post-content ol {
      padding-left: 1.4em;
      margin: 0 0 1.2em;
    }
    .post-content li { margin-bottom: 0.4em; }
    .post-content strong { color: #264653; font-weight: 700; }
    .post-content blockquote {
      border-left: 3px solid #4DB6AC;
      margin: 1.5em 0;
      padding: 12px 20px;
      background: rgba(77,182,172,0.07);
      border-radius: 0 10px 10px 0;
      color: #4a6270;
      font-style: italic;
    }
    .post-content a { color: #4DB6AC; }
    .post-content img {
      max-width: 100%;
      border-radius: 12px;
      margin: 1.5em 0;
    }

    /* ── SIDEBAR ──────────────────────────────────────────────── */
    .post-sidebar {
      position: sticky;
      top: 100px;
    }
    .sidebar-card {
      background: #fff;
      border: 1px solid rgba(77,182,172,0.14);
      border-radius: 16px;
      padding: 24px;
      margin-bottom: 20px;
      box-shadow: 0 2px 16px rgba(38,70,83,0.05);
    }
    .sidebar-card__title {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #7a9aaa;
      margin-bottom: 14px;
    }
    .toc-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .toc-list li {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.85rem;
      color: #4a6270;
      padding: 6px 0;
      border-bottom: 1px solid rgba(77,182,172,0.08);
      cursor: pointer;
      transition: color 0.15s;
    }
    .toc-list li:last-child { border-bottom: none; }
    .toc-list li:hover { color: #4DB6AC; }
    .author-info { display: flex; align-items: center; gap: 12px; }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(77,182,172,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-size: 1.4rem;
    }
    .author-name {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.9rem;
      font-weight: 700;
      color: #264653;
    }
    .author-role {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.78rem;
      color: #7a9aaa;
      margin-top: 2px;
    }
    .sidebar-cta {
      background: linear-gradient(135deg, #4DB6AC, #264653);
      border-radius: 14px;
      padding: 24px;
      text-align: center;
      color: #fff;
    }
    .sidebar-cta__title {
      font-family: 'Montserrat', sans-serif;
      font-size: 1rem;
      font-weight: 800;
      margin: 0 0 8px;
    }
    .sidebar-cta__sub {
      font-family: 'Montserrat', sans-serif;
      font-size: 0.8rem;
      opacity: 0.8;
      margin: 0 0 16px;
      line-height: 1.5;
    }

    /* ── RESPONSIVE ───────────────────────────────────────────── */
    @media (max-width: 900px) {
      .post-layout { grid-template-columns: 1fr; gap: 32px; }
      .post-sidebar { position: static; }
    }