:root {
      --white:         #ffffff;
      --off-white:     #f4f6f9;
      --gray-100:      #eef2f7;
      --gray-200:      #dce3ec;
      --gray-300:      #b8c5d4;
      --gray-500:      #555555;
      --gray-700:      #444444;
      --gray-900:      #333333;
      --accent:        #1a3a5c;
      --accent-light:  #e8eef5;
      --accent-mid:    #2e5f94;
      --gradient-hero: linear-gradient(160deg, #ffffff 0%, #eef2f7 55%, #dce3ec 100%);
      --gradient-alt:  linear-gradient(180deg, #f4f6f9 0%, #eef2f7 100%);
      --serif:         'Palatino Linotype', Palatino, 'Book Antiqua', Georgia, "Times New Roman", serif;
      --sans:          'Palatino Linotype', Palatino, Georgia, "Times New Roman", serif;
      --radius:        2px;
      --max-w:         1100px;
      --t:             0.3s ease;
    }


 /* ─── Header ─────────────────────────────────────────────── */
    header {
      position: sticky; top: 0; z-index: 100;
      background: rgba(255,255,255,0.93);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--gray-100);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 0;
    }
    .logo { display: flex; flex-direction: column; gap: 0.05rem; }
    .logo__name {
      font-family: var(--serif);
      font-size: 1.1rem;
      font-weight: normal;
      letter-spacing: 0.01em;
      color: var(--gray-900);
    }
    .logo__sub {
      font-size: 0.7rem;
      letter-spacing: 0.13em;
      text-transform: uppercase;
      color: var(--gray-500);
    }
    nav ul {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    nav a {
      font-size: 0.8rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--gray-700);
      position: relative;
      padding-bottom: 2px;
      transition: color var(--t);
    }
    nav a::after {
      content: '';
      position: absolute;
      bottom: 0; left: 0;
      width: 0; height: 1px;
      background: var(--accent);
      transition: width var(--t);
    }
    nav a:hover { color: var(--accent); }
    nav a:hover::after { width: 100%; }
    nav .nav-cta {
      border: 1px solid var(--accent);
      padding: 0.42rem 1.05rem;
      border-radius: var(--radius);
      color: var(--accent);
      transition: background var(--t), color var(--t);
    }
    nav .nav-cta:hover { background: var(--accent); color: var(--white); }
    nav .nav-cta::after { display: none; }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 4px;
    }
    .nav-toggle span {
      display: block;
      width: 24px; height: 1px;
      background: var(--gray-700);
    }