/* ── Nav ── */
  .nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 80;
    transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
  }
  .nav.scrolled {
    background: rgba(255,255,255,0.55);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border-bottom: 1px solid var(--glass-edge);
    box-shadow: 0 6px 30px rgba(27,35,46,0.06);
  }
  .nav-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 3rem;
    display: flex; align-items: center; justify-content: space-between; height: 72px;
  }
  .nav-logo { font-family: var(--serif); font-size: 1.36rem; font-weight: 500; letter-spacing: -0.01em; color: var(--ink); }
  .nav-links { display: flex; align-items: center; gap: 2rem; }
  .nav-link {
    font-family: var(--serif); font-size: 0.74rem; font-weight: 500;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--ink); background: none; border: none; padding: 0; transition: color 0.2s;
    display: inline-flex; align-items: center; cursor: pointer;
  }
  .nav-link:hover { color: var(--shell-accent); }
  .nav-cta {
    color: #fff; background: var(--shell-accent); font-family: var(--serif);
    padding: 8px 24px; border-radius: 40px;
    font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
    font-weight: 600; transition: background 0.2s, transform 0.2s; border: none;
  }
  .nav-cta:hover { background: var(--shell-accent-deep); transform: translateY(-1px); }

  /* hamburger (mobile) */
  .nav-burger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; padding: 8px; background: none; border: none; cursor: pointer; }
  .nav-burger span { display: block; height: 2px; width: 100%; background: var(--ink); border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease; }
  .nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  @media (max-width: 720px) {
    .nav-inner { padding: 0 1.5rem; }
    .nav-burger { display: flex; }
    .nav-links {
      position: absolute; top: 100%; left: 0; right: 0;
      flex-direction: column; align-items: stretch; gap: 0;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%);
      border-bottom: 1px solid var(--glass-edge); box-shadow: 0 16px 40px rgba(27,35,46,0.12);
      padding: 0 1.5rem; max-height: 0; overflow: hidden; opacity: 0; pointer-events: none;
      transition: max-height 0.32s ease, opacity 0.25s ease, padding 0.32s ease;
    }
    .nav-links.open { max-height: 80vh; opacity: 1; pointer-events: auto; padding: 0.5rem 1.5rem 1rem; }
    .nav-links > .nav-link, .nav-links > .nav-cta { width: 100%; text-align: left; justify-content: flex-start; padding: 14px 0; }
    .nav-cta { background: none; color: var(--shell-accent); border-radius: 0; }
    .work-dropdown { width: 100%; }
    .work-menu { position: static; opacity: 1; transform: none; pointer-events: auto; min-width: 0; background: transparent; border: none; box-shadow: none; padding: 0 0 8px; }
    #workToggle { width: 100%; justify-content: space-between; padding: 14px 0; }
  }

  .work-dropdown { position: relative; }
  .work-menu {
    position: absolute; top: calc(100% + 16px); right: 0; min-width: 246px;
    background: rgba(255,255,255,0.6);
    backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%);
    border: 1px solid var(--glass-edge); border-radius: 16px;
    box-shadow: var(--glass-shadow), var(--glass-inset); padding: 8px; overflow: hidden;
    opacity: 0; transform: translateY(-8px) scale(0.97); pointer-events: none;
    transition: opacity 0.18s, transform 0.18s;
  }
  .work-menu.open { opacity: 1; transform: none; pointer-events: auto; }
  .work-item {
    display: block; padding: 11px 16px; border-radius: 10px;
    font-family: var(--sans); font-size: 0.86rem; color: var(--ink);
    transition: background 0.16s, padding-left 0.2s;
  }
  .work-item:hover { background: var(--shell-accent-soft); padding-left: 20px; }
  .work-item.is-current { color: var(--shell-accent); background: var(--shell-accent-soft); }
  .work-item .sub { display: block; font-size: 0.72rem; color: var(--muted-soft); margin-top: 2px; }