/* ============================================================
   SHELL — estructura tipo aplicación móvil
   Barra superior fija · contenido scrollable · nav inferior
   ============================================================ */

.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 640px;              /* en escritorio se comporta como app */
  margin: 0 auto;
  border-left: 0.5px solid var(--line);
  border-right: 0.5px solid var(--line);
}

/* ---------- barra superior ---------- */

.barra {
  flex: 0 0 auto;
  padding-top: var(--safe-top);
  background: var(--white);
  border-bottom: 0.5px solid var(--line);
  z-index: 20;
}

.barra-fila {
  height: var(--barra-alto);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 var(--pad-x);
}

.barra-titulo {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.barra-btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--black);
  transition: opacity 0.22s var(--curva);
}
.barra-btn:hover  { opacity: 0.6; }
.barra-btn:active { opacity: 0.4; }
.barra-btn svg { width: 19px; height: 19px; }

/* ---------- buscador ---------- */

.buscador {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 var(--pad-x) 0.7rem;
}

.buscador input {
  flex: 1;
  padding: 0.62rem 0.75rem;
  font-size: 0.9rem;
  font-weight: 300;
  background: var(--off);
  border: 0.5px solid transparent;
  transition: border-color 0.22s var(--curva);
}
.buscador input::placeholder { color: var(--muted); }
.buscador input:focus {
  outline: none;
  border-color: var(--black);
}

.buscador-limpiar {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
}

/* ---------- conmutador de vista ---------- */

.conmutador {
  display: flex;
  border-top: 0.5px solid var(--line-sutil);
}

.conmutador button {
  flex: 1;
  padding: 0.62rem 0;
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  position: relative;
  transition: color 0.22s var(--curva);
}

.conmutador button[aria-pressed="true"] {
  color: var(--black);
  font-weight: 700;
}

/* Marcador naranja: señala acción, no decora */
.conmutador button[aria-pressed="true"]::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--accent);
}

/* ---------- área de contenido ---------- */

.vistas {
  flex: 1 1 auto;
  position: relative;
  overflow: hidden;
}

.vista {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2rem;
}

.vista[hidden] { display: none; }

/* ---------- nav inferior ---------- */

.nav {
  flex: 0 0 auto;
  display: flex;
  background: var(--white);
  border-top: 0.5px solid var(--line);
  padding-bottom: var(--safe-bottom);
  z-index: 20;
}

.nav-btn {
  flex: 1;
  height: var(--nav-alto);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--muted);
  position: relative;
  transition: color 0.22s var(--curva);
}

.nav-btn svg { width: 20px; height: 20px; }

.nav-btn span {
  font-size: 0.55rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav-btn[aria-current="page"] { color: var(--black); }
.nav-btn[aria-current="page"] span { font-weight: 700; }

.nav-btn[aria-current="page"]::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 22px; height: 2px;
  background: var(--accent);
}

/* Contador de artículos sobre el icono */
.nav-contador {
  position: absolute;
  top: 9px;
  left: 50%;
  margin-left: 6px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--accent);
  color: var(--white);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0;
  display: grid;
  place-items: center;
}
.nav-contador[data-vacio="true"] { display: none; }

/* ---------- hoja inferior ---------- */

.hoja-fondo {
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.35);
  z-index: 40;
  animation: entrar 0.2s var(--curva);
}
.hoja-fondo[hidden] { display: none; }

.hoja {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  max-width: 640px;
  margin: 0 auto;
  max-height: 82dvh;
  overflow-y: auto;
  background: var(--white);
  padding: 1.4rem var(--pad-x) calc(1.6rem + var(--safe-bottom));
  animation: subir 0.3s var(--curva);
}

.hoja-titulo {
  font-size: 0.66rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.2rem;
}

.hoja-opcion {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 0;
  text-align: left;
  font-size: 0.95rem;
  border-bottom: 0.5px solid var(--line-sutil);
  transition: opacity 0.22s var(--curva);
}
.hoja-opcion:last-child { border-bottom: none; }
.hoja-opcion:active { opacity: 0.5; }
.hoja-opcion svg { width: 18px; height: 18px; flex: 0 0 auto; }
.hoja-opcion small {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 2px;
}
.hoja-opcion.peligro { color: #c0392b; }

/* ---------- aviso flotante ---------- */

.aviso {
  position: fixed;
  left: 50%;
  bottom: calc(var(--nav-alto) + var(--safe-bottom) + 16px);
  transform: translateX(-50%);
  background: var(--black);
  color: var(--white);
  padding: 0.7rem 1.1rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  z-index: 60;
  animation: entrar 0.25s var(--curva);
}
.aviso[hidden] { display: none; }

/* ---------- estado vacío ---------- */

.vacio {
  padding: 22vh var(--pad-x) 0;
  text-align: center;
}
.vacio p {
  font-size: 0.9rem;
  color: var(--muted-2);
  line-height: 1.7;
  max-width: 260px;
  margin: 0 auto;
}
.vacio strong {
  display: block;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--black);
  margin-bottom: 0.6rem;
}

/* Punto naranja sobre una pestaña que reclama atención */
.nav-punto {
  position: absolute;
  top: 11px;
  left: 50%;
  margin-left: 7px;
  width: 6px;
  height: 6px;
  background: var(--accent);
}