.nav-overlay:not([hidden]) {
  display: flex; position: fixed; inset: 0; z-index: 55; flex-direction: column; align-items: center; justify-content: center; gap: 28px;
  background: color-mix(in srgb, var(--page) 90%, transparent);
}
.nav-overlay nav { display: grid; gap: 18px; text-align: center; }
.nav-overlay nav a { color: var(--strong); font-size: 28px; font-weight: 700; letter-spacing: -.04em; text-decoration: none; }
.nav-overlay p { color: var(--muted); font-size: 14px; }
body:has(.nav-overlay:not([hidden])) { overflow: hidden; }
@media print {
  .nav-overlay { display: none !important; }
}

/* ---------- Menú de etapas (celulares) ---------- */
.landing .nav-overlay { display: flex; flex-direction: column; gap: 14px; padding: max(18px, env(safe-area-inset-top)) 18px max(18px, env(safe-area-inset-bottom)); position: fixed; inset: 0; z-index: 95; background: color-mix(in srgb, var(--page) 92%, transparent); opacity: 0; transition: opacity .4s var(--ease); overflow: auto; }
.landing .nav-overlay[hidden] { display: none; }
.landing .nav-overlay.is-open { opacity: 1; }
.menu-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.menu-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.menu-steps a { display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start; padding: 10px 12px; border-radius: 16px; border: 1px solid var(--line); background: var(--glass); text-decoration: none; transition: all .4s var(--ease); font-size: inherit; text-align: left; }
.menu-steps a:hover,
.menu-steps a[aria-current="step"] { border-color: var(--accent); background: color-mix(in srgb, var(--sky) 9%, var(--card)); }
.menu-steps .mn { font: 700 12px/1.6 var(--mono); color: var(--accent); }
.menu-steps b { display: block; font-size: 15px; color: var(--strong); letter-spacing: -.02em; }
.menu-steps small { display: block; font-size: 12px; line-height: 1.45; color: var(--text); font-weight: 500; }
.menu-steps small em { font: 600 9px/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-style: normal; margin-right: 6px; }
.menu-steps small.y em { color: var(--accent); }
.menu-foot { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; position: sticky; bottom: 0; padding-top: 8px; }
.menu-foot { background: linear-gradient(to top, var(--page) 62%, transparent); padding: 28px 0 4px; margin-top: auto; }