* { box-sizing: border-box; }
    body {
      margin: 0;
      font-family: var(--font);
      color: var(--text);
      background: var(--bg);
      line-height: 1.55;
    }
    a {
      color: var(--accent);
      text-underline-offset: 2px;
    }
    a:hover {
      color: color-mix(in srgb, var(--accent) 80%, transparent);
      text-decoration: underline;
      text-decoration-thickness: 1px;
    }
    h1, h2, h3 {
      color: var(--text);
      font-weight: 700;
    }
    .site-header {
      background: var(--ivoa-primary);
      border-bottom: none;
      box-shadow: 0 2px 6px rgba(1, 38, 71, 0.18);
    }
    .site-header-inner {
      max-width: 920px;
      margin: 0 auto;
      padding: 0.85rem 1.25rem;
    }
    .site-brand {
      display: flex;
      align-items: center;
      gap: 1rem;
      text-decoration: none;
      color: inherit;
    }
    .site-brand:hover { text-decoration: none; }
    .site-brand:hover .site-title { color: var(--ivoa-accent-hover); }
    .site-brand:hover .site-subtitle { color: var(--ivoa-white); }
    .site-logo {
      display: block;
      height: 3.5rem;
      width: auto;
      flex: 0 0 auto;
    }
    .site-brand-text {
      display: flex;
      flex-direction: column;
      gap: 0.15rem;
      min-width: 0;
    }
    .site-title {
      font-size: clamp(1.05rem, 2.2vw, 1.35rem);
      font-weight: 700;
      line-height: 1.2;
      color: var(--header-text);
      letter-spacing: -0.01em;
    }
    .site-subtitle {
      font-size: 0.78rem;
      font-weight: 500;
      line-height: 1.3;
      color: var(--header-muted);
    }
    @media (max-width: 480px) {
      .site-brand { gap: 0.75rem; }
      .site-logo { height: 2.75rem; }
      .site-subtitle { font-size: 0.72rem; }
    }