:root {
  --fondo: #f5f0ea;
  --fondo-alt: #fffaf5;
  --card: rgba(255, 255, 255, 0.92);
  --texto: #281b22;
  --texto-suave: #6a5863;
  --borde: #eadfd8;
  --principal: #7a173b;
  --principal-oscuro: #5f0f2d;
  --principal-claro: #f8e8ef;
  --dorado: #b98a2f;
  --sombra: 0 18px 38px rgba(61, 35, 45, 0.10);
  --radio: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(185, 138, 47, 0.14), transparent 25%),
    linear-gradient(180deg, #fbf7f3 0%, #f3ece6 100%);
  color: var(--texto);
}

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 14px 90px;
}

.hero {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 22px;
  margin-bottom: 18px;
  border-radius: 28px;
  color: white;
  background: linear-gradient(135deg, #7a173b 0%, #972f57 52%, #b98a2f 100%);
  box-shadow: var(--sombra);
}

.hero-icono {
  flex: 0 0 68px;
  width: 68px;
  height: 68px;
  border-radius: 18px;
  background: rgba(255,255,255,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  backdrop-filter: blur(4px);
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  font-weight: 700;
  opacity: 0.86;
}

h1 {
  font-size: clamp(1.45rem, 3.5vw, 2rem);
  margin: 0;
  line-height: 1.2;
}

.hero-subtitulo {
  margin: 8px 0 0;
  color: rgba(255,255,255,0.92);
  line-height: 1.5;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.75);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  backdrop-filter: blur(10px);
}

.resultado,
.acciones-card,
.extras-grid {
  margin-top: 16px;
}

.app > .card + .card {
  margin-top: 16px;
}

.card-title-wrap {
  margin-bottom: 14px;
}

.card-title {
  margin: 0;
  font-size: 1.15rem;
  color: var(--principal);
}

.card-subtitle {
  margin: 6px 0 0;
  color: var(--texto-suave);
  line-height: 1.45;
  font-size: 0.95rem;
}

.buscador-card,
.acciones-card,
.extra-card,
.resultado {
  padding: 18px;
}

.buscador {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.campo {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.full-width {
  grid-column: 1 / -1;
}

.campo label {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--texto);
}

.buscador input,
.buscador button,
.acciones button,
.btn-secundario {
  border: 1px solid var(--borde);
  border-radius: 14px;
  min-height: 50px;
  font-size: 1rem;
  transition: 0.22s ease;
}

.buscador input {
  padding: 0 14px;
  background: #fff;
  color: var(--texto);
  outline: none;
}

.buscador input:focus {
  border-color: rgba(122, 23, 59, 0.40);
  box-shadow: 0 0 0 4px rgba(122, 23, 59, 0.08);
}

.campo-boton button,
#btnBuscar {
  border: none;
  background: linear-gradient(135deg, var(--principal) 0%, #9b335c 100%);
  color: white;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(122, 23, 59, 0.18);
}

.campo-boton button:hover,
#btnBuscar:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, var(--principal-oscuro) 0%, #83254b 100%);
}

.campo-libro {
  position: relative;
}

.sugerencias {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 1000;
  background: #fff;
  border: 1px solid var(--borde);
  border-radius: 16px;
  max-height: 240px;
  overflow-y: auto;
  list-style: none;
  margin: 0;
  padding: 8px;
  display: none;
  color: var(--texto);
  box-shadow: 0 16px 36px rgba(42, 24, 32, 0.15);
}

.sugerencias li {
  padding: 10px 12px;
  cursor: pointer;
  border-radius: 12px;
}

.sugerencias li:hover,
.sugerencias li.activa {
  background: var(--principal-claro);
  color: var(--principal);
}

.resultado {
  min-height: 140px;
  font-size: 18px;
  line-height: 1.72;
}

.resultado h2 {
  margin: 0 0 14px;
  color: var(--principal);
  font-size: 1.3rem;
}

.resultado p {
  margin: 0 0 12px;
}

.resultado p:last-child {
  margin-bottom: 0;
}

.estado-vacio,
.estado-error {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 100px;
  border-radius: 16px;
  padding: 16px;
}

.estado-vacio {
  background: linear-gradient(180deg, rgba(248, 232, 239, 0.7), rgba(255, 255, 255, 0.8));
  border: 1px dashed rgba(122, 23, 59, 0.22);
}

.estado-error {
  background: rgba(255, 240, 240, 0.95);
  border: 1px solid rgba(205, 68, 68, 0.22);
}

.estado-vacio-titulo,
.estado-error-titulo {
  margin: 0 0 6px;
  font-weight: 700;
  font-size: 1.04rem;
}

.estado-vacio-texto,
.estado-error-texto {
  margin: 0;
  color: var(--texto-suave);
  line-height: 1.55;
}

.acciones {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.acciones button,
.btn-secundario {
  padding: 12px 14px;
  background: #fff;
  color: var(--texto);
  font-weight: 700;
  cursor: pointer;
}

.acciones button:hover,
.btn-secundario:hover {
  transform: translateY(-1px);
  border-color: rgba(122, 23, 59, 0.28);
  background: #fff8fb;
}


/* Hace que la última acción no quede sola y desalineada */
.acciones button:last-child {
  grid-column: 1 / -1;
}

.extras-grid {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.extra-card {
  flex: 1 1 0;
  min-width: 0;
  min-height: 350px;
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.extra-head {
  height: 72px;
  margin-bottom: 14px;
}

.extra-head .card-title {
  margin: 0 0 8px;
}

.extra-head .card-subtitle {
  margin: 0;
}

.extra-body {
  flex: 1;
  display: flex;
}

.lista-referencias {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
  min-height: 170px;
  overflow: auto;
}

.lista-referencias:empty {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  color: var(--texto-suave);
  background: linear-gradient(180deg, rgba(248, 232, 239, 0.52), rgba(255, 255, 255, 0.8));
  border: 1px dashed rgba(122, 23, 59, 0.16);
  border-radius: 14px;
}

.lista-referencias:empty::before {
  content: "Aún no hay elementos guardados.";
}

.lista-referencias li {
  background: var(--fondo-alt);
  border: 1px solid var(--borde);
  border-radius: 14px;
  padding: 12px;
  cursor: pointer;
  transition: 0.2s ease;
  margin-bottom: 8px;
}

.lista-referencias li:last-child {
  margin-bottom: 0;
}

.lista-referencias li:hover {
  background: var(--principal-claro);
  border-color: rgba(122, 23, 59, 0.22);
}

.extra-footer {
  margin-top: 14px;
}

.btn-peligro {
  width: 100%;
  border: 1px solid rgba(199, 63, 63, 0.22);
  color: #a93131;
  background: #fff5f5;
}

.btn-peligro:hover {
  background: #ffeaea;
}

.btn-volver {
  position: fixed;
  bottom: 18px;
  right: 18px;
  background: linear-gradient(135deg, rgba(166, 22, 36, 0.95), rgba(122, 23, 59, 0.95));
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 58px;
  height: 58px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  cursor: pointer;
  z-index: 2000;
  box-shadow: 0 10px 24px rgba(0,0,0,0.22);
}

.btn-volver:hover {
  transform: translateY(-2px);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-thumb {
  background: rgba(122, 23, 59, 0.25);
  border-radius: 999px;
}

::-webkit-scrollbar-track {
  background: rgba(122, 23, 59, 0.06);
}

@media (max-width: 720px) {
  .app {
    padding: 14px 12px 90px;
  }

  .hero {
    padding: 18px;
    border-radius: 24px;
  }

  .buscador,
  .acciones {
    grid-template-columns: 1fr;
  }

  .extras-grid {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-icono {
    width: 60px;
    height: 60px;
    font-size: 28px;
  }

  .resultado {
    font-size: 17px;
  }

  .btn-volver {
    width: 50px;
    height: 50px;
    font-size: 21px;
    bottom: 12px;
    right: 12px;
  }
}


.extras-grid > .card {
  margin-top: 0 !important;
}