/* ═══════════════════════════════════════════════════════════
   App shell — barra lateral en tablet+, barra inferior en movil.
   Es el unico sitio del sistema con una media query, y esta declarada: la
   navegacion CAMBIA de forma entre movil y escritorio, que es justo el caso que
   Every Layout deja fuera de sus primitivas sin media queries.
   ═══════════════════════════════════════════════════════════ */

.skip-link {
  position: absolute;
  inline-size: 1px; block-size: 1px;
  overflow: hidden; clip-path: inset(50%);
}
.skip-link:focus {
  inline-size: auto; block-size: auto;
  clip-path: none;
  inset-block-start: var(--space-xs); inset-inline-start: var(--space-xs);
  z-index: 60;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  background-color: var(--color-teal-600); color: #fff;
}

.print-header { display: none; }

.app-shell { display: block; }
.sidebar { display: none; }

.brand { padding: var(--space-lg) var(--space-md); border-block-end: 1px solid var(--color-stone-700); }
.brand__name { font-family: var(--font-display); font-size: var(--size-step-3); color: #fff; }
.brand__tag { font-size: var(--size-step--1); color: var(--color-stone-500); }

.nav-link {
  display: flex; align-items: center; gap: var(--space-sm);
  min-block-size: var(--tap-target);
  padding-inline: var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--size-step-0); font-weight: 500;
  color: var(--color-stone-300); text-decoration: none;
}
.nav-link:hover { background-color: var(--color-stone-800); color: #fff; }
.nav-link[aria-current="page"] { background-color: var(--color-stone-800); color: #fff; }
.nav-icon { inline-size: 1.25rem; block-size: 1.25rem; color: var(--color-stone-500); flex: none; }

/* Barra inferior (movil) */
.tabbar {
  position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 20;
  display: flex; justify-content: space-around;
  background-color: var(--surface-card);
  border-block-start: 1px solid var(--line);
}
.tabbar__item {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-3xs);
  min-block-size: var(--tap-target); min-inline-size: var(--tap-target);
  padding-inline: var(--space-sm);
  color: var(--ink-muted); text-decoration: none;
}
.tabbar__item[aria-current="page"], .tabbar__item:hover { color: var(--color-teal-700); }
.tabbar__label { font-size: 0.625rem; font-weight: 500; }

.app-main { flex: 1; min-inline-size: 0; padding-block-end: 5rem; }

@media (min-width: 48rem) {
  .app-shell { display: flex; min-block-size: 100%; }
  .sidebar {
    display: flex; flex-direction: column;
    inline-size: 14rem; flex: none;
    background-color: var(--color-stone-900); color: var(--color-stone-300);
  }
  .tabbar { display: none; }
  .app-main { padding-block-end: var(--space-xl); }
}

@media print {
  .sidebar, .tabbar, .skip-link { display: none !important; }
  .print-header { display: block; text-align: center; margin-block-end: var(--space-lg);
                  border-block-end: 1px solid var(--color-stone-300); padding-block-end: var(--space-md); }
  .app-main { padding-block-end: 0; }
}

.sidebar__nav { flex: 1; padding: var(--space-md) var(--space-sm); }
.sidebar__foot { padding: var(--space-md) var(--space-sm); border-block-start: 1px solid var(--color-stone-700); }
.tabbar__row { display: flex; justify-content: space-around; inline-size: 100%; padding-block: var(--space-2xs); }
.messages { padding: var(--space-md) var(--space-md) 0; }

.avatar {
  inline-size: 2rem; block-size: 2rem;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  background-color: var(--color-teal-600); color: #fff;
  font-size: var(--size-step-0); font-weight: 600;
}