/* ============================================================
   ATHENAEUM — sala de lectura nocturna
   Paleta:
     --tinta      #14171C  fondo principal
     --superficie #1C2129  tarjetas / paneles
     --superficie-2 #232A34  hover / elevado
     --ambar      #E3A857  acento principal (luz de lámpara)
     --teal       #4FA8A0  acento secundario (estudio)
     --texto      #EDEFF2  texto principal
     --texto-mut  #8891A0  texto secundario
   Tipografía:
     Display: Fraunces (serif con carácter, títulos)
     Cuerpo:  Inter
     Utilidad: JetBrains Mono (metadatos, fechas, contadores)
   ============================================================ */

:root {
  --tinta: #14171C;
  --superficie: #1C2129;
  --superficie-2: #232A34;
  --ambar: #E3A857;
  --ambar-suave: #F0C179;
  --teal: #4FA8A0;
  --texto: #EDEFF2;
  --texto-mut: #8891A0;
  --borde: #2A313C;
  --radio: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--tinta);
  color: var(--texto);
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .fuente-display {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  letter-spacing: -0.01em;
}

a { color: inherit; text-decoration: none; }

.mono { font-family: 'JetBrains Mono', monospace; }

/* Accesibilidad: foco visible siempre */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--ambar);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ------------------------------------------------------------
   LAYOUT GENERAL
   ------------------------------------------------------------ */
.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--superficie);
  border-right: 1px solid var(--borde);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.2rem;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-marca {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 2.5rem;
}
.sidebar-icono { font-size: 1.6rem; }
.sidebar-titulo { font-family: 'Fraunces', serif; font-size: 1.3rem; font-weight: 700; }

.sidebar-nav { display: flex; flex-direction: column; gap: .3rem; flex: 1; }
.sidebar-nav a {
  display: flex; align-items: center; gap: .8rem;
  padding: .7rem .9rem; border-radius: 10px;
  color: var(--texto-mut); font-weight: 500; font-size: .95rem;
  transition: background .15s, color .15s;
}
.sidebar-nav a:hover { background: var(--superficie-2); color: var(--texto); }
.sidebar-nav a.nav-activo { background: var(--superficie-2); color: var(--ambar); }
.nav-icono { font-size: 1.1rem; width: 1.4rem; text-align: center; }

.sidebar-usuario {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 1rem; border-top: 1px solid var(--borde);
  font-size: .85rem; color: var(--texto-mut);
}
.sidebar-usuario .salir { color: var(--ambar); font-weight: 600; }
.sidebar-usuario .salir:hover { text-decoration: underline; }

.contenido { padding: 2.5rem 3rem; max-width: 1400px; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: relative; height: auto; flex-direction: row;
    align-items: center; justify-content: space-between; padding: 1rem 1.2rem;
  }
  .sidebar-nav { flex-direction: row; }
  .sidebar-usuario { display: none; }
  .contenido { padding: 1.5rem 1.2rem; }
}

/* ------------------------------------------------------------
   LOGIN
   ------------------------------------------------------------ */
.pagina-login {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; position: relative; overflow: hidden;
  background: var(--tinta);
}
.orbe {
  position: absolute; border-radius: 50%; filter: blur(60px);
  opacity: .35; z-index: 0; animation: flotar 14s ease-in-out infinite;
}
.orbe-1 { width: 420px; height: 420px; background: var(--ambar); top: -10%; left: -8%; }
.orbe-2 { width: 340px; height: 340px; background: var(--teal); bottom: -12%; right: -6%; animation-delay: -6s; }
@keyframes flotar {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(3%, -4%) scale(1.08); }
}
.login-caja {
  background: rgba(28,33,41,.85);
  backdrop-filter: blur(14px);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 2.5rem;
  width: 100%;
  max-width: 380px;
  position: relative; z-index: 1;
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
  animation: subir .6s ease;
}
.login-marca { text-align: center; margin-bottom: 2rem; }
.login-icono { font-size: 2.6rem; display: inline-block; animation: flotar 6s ease-in-out infinite; }
.login-marca h1 { margin: .5rem 0 .3rem; font-size: 2.1rem; }
.login-marca p { color: var(--texto-mut); font-size: .9rem; margin: 0; }
.login-form label { display: block; font-size: .82rem; color: var(--texto-mut); margin: 1rem 0 .3rem; }
.login-form input {
  width: 100%; padding: .75rem .9rem; border-radius: 10px;
  border: 1px solid var(--borde); background: var(--tinta); color: var(--texto);
  font-size: .95rem;
}
.login-form input:focus { border-color: var(--ambar); }
.login-form button {
  width: 100%; margin-top: 1.5rem; padding: .8rem; border: none;
  border-radius: 10px; background: var(--ambar); color: var(--tinta);
  font-weight: 700; font-size: .95rem; cursor: pointer; transition: background .15s;
}
.login-form button:hover { background: var(--ambar-suave); }
.login-error {
  background: #3a2420; border: 1px solid #6b3a30; color: #f0a89a;
  padding: .6rem .8rem; border-radius: 8px; font-size: .85rem; margin: 0 0 .5rem;
}

/* ------------------------------------------------------------
   HERO / BANNER CARRUSEL (Inicio)
   ------------------------------------------------------------ */
.hero {
  position: relative;
  border-radius: var(--radio);
  overflow: hidden;
  background: linear-gradient(135deg, #232A34 0%, #181D24 100%);
  border: 1px solid var(--borde);
  min-height: 280px;
  display: flex;
  align-items: center;
  margin-bottom: 2.5rem;
}
.hero-slide {
  display: none;
  width: 100%;
  padding: 2.5rem 3rem;
  align-items: center;
  gap: 2.5rem;
}
.hero-slide.activa { display: flex; }
.hero-etiqueta {
  color: var(--ambar); font-family: 'JetBrains Mono', monospace;
  font-size: .78rem; letter-spacing: .08em; text-transform: uppercase;
}
.hero-titulo { font-size: 2.1rem; margin: .4rem 0 .5rem; max-width: 480px; }
.hero-meta { color: var(--texto-mut); font-size: .95rem; margin-bottom: 1.2rem; }
.hero-boton {
  display: inline-block; background: var(--ambar); color: var(--tinta);
  padding: .65rem 1.4rem; border-radius: 10px; font-weight: 700; font-size: .9rem;
}
.hero-boton:hover { background: var(--ambar-suave); }
.hero-portada {
  width: 130px; height: 190px; border-radius: 8px; object-fit: cover;
  box-shadow: 0 12px 30px rgba(0,0,0,.5); flex-shrink: 0;
}
.hero-controles {
  position: absolute; bottom: 1rem; right: 1.5rem; display: flex; gap: .5rem;
}
.hero-punto {
  width: 8px; height: 8px; border-radius: 50%; background: var(--borde);
  border: none; cursor: pointer; padding: 0;
}
.hero-punto.activo { background: var(--ambar); }

/* ------------------------------------------------------------
   SECCIONES / TÍTULOS
   ------------------------------------------------------------ */
.seccion-titulo {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 1.2rem;
}
.seccion-titulo h2 { font-size: 1.4rem; margin: 0; }
.seccion-titulo .ver-todo { color: var(--texto-mut); font-size: .85rem; }
.seccion-titulo .ver-todo:hover { color: var(--ambar); }

/* ------------------------------------------------------------
   ESTANTE — lomos de libro (elemento distintivo)
   ------------------------------------------------------------ */
.estante {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  padding-bottom: .5rem;
  margin-bottom: 2.5rem;
}
.lomo {
  flex-shrink: 0;
  width: 56px;
  height: 210px;
  border-radius: 6px 6px 3px 3px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: .8rem .4rem;
  cursor: pointer;
  transition: width .22s ease, box-shadow .22s ease;
  box-shadow: 2px 0 6px rgba(0,0,0,.3);
  position: relative;
  overflow: hidden;
}
.lomo span {
  writing-mode: vertical-rl;
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: .82rem;
  color: rgba(255,255,255,.92);
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  max-height: 100%;
}
.lomo:hover {
  width: 130px;
  box-shadow: 4px 6px 16px rgba(0,0,0,.45);
}
.lomo .lomo-estado {
  position: absolute; top: .5rem; right: .5rem;
  width: 8px; height: 8px; border-radius: 50%;
}
.estado-pendiente { background: var(--texto-mut); }
.estado-leyendo { background: var(--ambar); }
.estado-terminado { background: var(--teal); }

/* ------------------------------------------------------------
   TARJETAS (grid de biblioteca / estudio)
   ------------------------------------------------------------ */
.grid-tarjetas {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1.4rem;
}
.tarjeta {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  overflow: hidden;
  transition: transform .18s ease, border-color .18s ease;
}
.tarjeta:hover { transform: translateY(-4px); border-color: var(--ambar); }
.tarjeta-portada {
  width: 100%; height: 240px; object-fit: cover;
  background: var(--superficie-2);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Fraunces', serif; font-size: 1rem; color: var(--texto-mut);
  padding: 1rem; text-align: center;
}
.tarjeta-info { padding: 1rem; }
.tarjeta-info h3 { font-size: 1rem; margin: 0 0 .2rem; line-height: 1.3; }
.tarjeta-info .autor { color: var(--texto-mut); font-size: .82rem; margin: 0 0 .6rem; }
.tarjeta-etiqueta {
  display: inline-block; font-size: .72rem; font-family: 'JetBrains Mono', monospace;
  padding: .2rem .5rem; border-radius: 5px; text-transform: uppercase;
}
.tarjeta-etiqueta.estado-pendiente { background: rgba(136,145,160,.15); color: var(--texto-mut); }
.tarjeta-etiqueta.estado-leyendo { background: rgba(227,168,87,.15); color: var(--ambar); }
.tarjeta-etiqueta.estado-terminado { background: rgba(79,168,160,.15); color: var(--teal); }

/* ------------------------------------------------------------
   BOTONES / UTILIDADES GENERALES
   ------------------------------------------------------------ */
.boton {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .65rem 1.2rem; border-radius: 10px; border: none;
  font-weight: 600; font-size: .9rem; cursor: pointer;
  background: var(--ambar); color: var(--tinta);
}
.boton:hover { background: var(--ambar-suave); }
.boton-secundario { background: var(--superficie-2); color: var(--texto); border: 1px solid var(--borde); }
.boton-secundario:hover { background: var(--borde); }

.vacio {
  text-align: center; padding: 3rem 1rem; color: var(--texto-mut);
  border: 1px dashed var(--borde); border-radius: var(--radio);
}

/* ------------------------------------------------------------
   SHOWCASE — banner grande con portadas rotando (Ken Burns)
   ------------------------------------------------------------ */
.showcase {
  position: relative;
  border-radius: var(--radio);
  overflow: hidden;
  min-height: 360px;
  margin-bottom: 2rem;
  isolation: isolate;
}
.showcase-fondo { position: absolute; inset: 0; z-index: 0; }
.showcase-fondo-img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0;
  animation: kenburns 12s ease-in-out infinite;
  transition: opacity 1.2s ease;
}
.showcase-fondo-img.activa { opacity: 1; }
@keyframes kenburns {
  0% { transform: scale(1) translate(0,0); }
  50% { transform: scale(1.12) translate(-1%, -1%); }
  100% { transform: scale(1) translate(0,0); }
}
.showcase-velo {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,23,28,.55) 0%, rgba(20,23,28,.85) 75%, rgba(20,23,28,.97) 100%);
}
.showcase-contenido {
  position: relative; z-index: 1;
  padding: 3rem 3rem 2.2rem;
  min-height: 360px;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.showcase-bienvenida {
  font-family: 'JetBrains Mono', monospace; font-size: .8rem;
  letter-spacing: .08em; text-transform: uppercase; color: var(--ambar-suave);
  margin-bottom: auto; padding-top: .5rem;
}
.showcase-slide { display: none; animation: subir .5s ease; }
.showcase-slide.activa { display: block; }
@keyframes subir { from { opacity:0; transform: translateY(14px); } to { opacity:1; transform: translateY(0); } }
.showcase-titulo { font-size: 2.6rem; margin: 0 0 .3rem; max-width: 640px; line-height: 1.1; }
.showcase-autor { color: var(--texto-mut); font-size: 1rem; margin: 0 0 1.2rem; }
.showcase-puntos { display: flex; gap: .5rem; margin-top: 1.2rem; }

@media (max-width: 700px) {
  .showcase-contenido { padding: 2rem 1.4rem 1.6rem; }
  .showcase-titulo { font-size: 1.8rem; }
}

/* ------------------------------------------------------------
   TARJETAS DE ESTADÍSTICAS (Inicio)
   ------------------------------------------------------------ */
.stats-fila { display: flex; gap: 1rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.stat-card {
  background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio);
  padding: 1.1rem 1.5rem; flex: 1; min-width: 150px;
  display: flex; flex-direction: column;
}
.stat-num { font-family: 'Fraunces', serif; font-size: 2rem; font-weight: 700; color: var(--ambar); }
.stat-label { color: var(--texto-mut); font-size: .82rem; }

/* ------------------------------------------------------------
   BARRA DE FILTROS (Biblioteca)
   ------------------------------------------------------------ */
.barra-filtros { display: flex; gap: .7rem; margin-bottom: 2rem; flex-wrap: wrap; }
.barra-filtros input[type="text"] {
  flex: 1; min-width: 220px; padding: .65rem 1rem; border-radius: 10px;
  border: 1px solid var(--borde); background: var(--superficie); color: var(--texto);
}
.barra-filtros select {
  padding: .65rem 1rem; border-radius: 10px; border: 1px solid var(--borde);
  background: var(--superficie); color: var(--texto);
}

/* ------------------------------------------------------------
   ACCIONES SOBRE TARJETA (leer / descargar / editar / eliminar)
   ------------------------------------------------------------ */
.tarjeta-acciones {
  display: flex; gap: .6rem; margin-top: .7rem; padding-top: .7rem;
  border-top: 1px solid var(--borde); font-size: 1rem;
}
.tarjeta-acciones a {
  color: var(--texto-mut); width: 28px; height: 28px; display: flex;
  align-items: center; justify-content: center; border-radius: 7px;
  transition: background .15s, color .15s;
}
.tarjeta-acciones a:hover { background: var(--superficie-2); color: var(--ambar); }

/* ------------------------------------------------------------
   FORMULARIO (agregar / editar libro)
   ------------------------------------------------------------ */
.form-libro {
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: var(--radio); padding: 2rem; max-width: 720px;
}
.form-fila { display: flex; gap: 1.2rem; margin-bottom: 1.2rem; flex-wrap: wrap; }
.form-campo { flex: 1; min-width: 220px; }
.form-campo label { display: block; font-size: .82rem; color: var(--texto-mut); margin-bottom: .4rem; }
.form-campo input, .form-campo select {
  width: 100%; padding: .65rem .85rem; border-radius: 10px;
  border: 1px solid var(--borde); background: var(--tinta); color: var(--texto);
}
.form-campo input[type="file"] { padding: .5rem; }
.form-ayuda { font-size: .75rem; color: var(--texto-mut); margin: .3rem 0 0; }