/* =====================================================================
   Sistema de Biblioteca - Hoja de estilos unica
   Paleta: marron claro / beige + verde oliva
   ===================================================================== */

:root {
    --color-fondo: #f4efe6;
    --color-fondo-card: #fffdf9;
    --color-borde: #ded2ba;
    --color-texto: #3a352a;
    --color-texto-suave: #8a8266;
    --color-oliva: #6b6f3a;
    --color-oliva-oscuro: #4b4d28;
    --color-oliva-claro: #a7ac6e;
    --color-beige-oscuro: #e4d9c2;
    --color-exito: #4f7d4a;
    --color-error: #a94442;
    --color-advertencia: #b8860b;
    --color-info: #3d6b8a;
    --sombra: 0 2px 10px rgba(75, 77, 40, 0.12);
    --sombra-fuerte: 0 14px 34px rgba(75, 77, 40, 0.16);
    --radio: 14px;
    --topbar-alto: 64px;
    --sidebar-ancho: 240px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--color-fondo);
    color: var(--color-texto);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-oliva-oscuro); }

h1, h2, h3, h4 { color: var(--color-oliva-oscuro); margin-top: 0; letter-spacing: -.01em; }

h1 { font-weight: 800; }

/* Icono base: todos los SVG inline heredan el color del texto que los rodea */
.icono {
    width: 18px;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}

:focus-visible {
    outline: 2px solid var(--color-oliva);
    outline-offset: 2px;
}

/* ---------------------------------------------------------------
   Layout general (topbar + sidebar + contenido)
   --------------------------------------------------------------- */
.app-shell { min-height: 100vh; }

.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-alto);
    background: var(--color-oliva-oscuro);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
    box-shadow: var(--sombra);
}

.topbar__marca { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.topbar__marca-icono { width: 24px; height: 24px; color: var(--color-oliva-claro); }

.topbar__toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 22px;
    cursor: pointer;
}

.topbar__usuario { display: flex; align-items: center; gap: 14px; }

.topbar__usuario span#nombreUsuarioActual { font-weight: 600; }

.topbar__usuario .avatar {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--color-oliva-claro);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; color: var(--color-oliva-oscuro);
}

.btn-logout {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.5);
    color: #fff;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}
.btn-logout:hover { background: rgba(255,255,255,0.15); }

.sidebar {
    position: fixed;
    top: var(--topbar-alto);
    left: 0;
    bottom: 0;
    width: var(--sidebar-ancho);
    background: linear-gradient(180deg, var(--color-oliva) 0%, var(--color-oliva-oscuro) 100%);
    padding: 20px 12px;
    overflow-y: auto;
    transition: transform .25s ease;
    z-index: 90;
    box-shadow: 2px 0 12px rgba(0,0,0,0.08);
}

.sidebar__etiqueta {
    color: rgba(244,239,230,0.6);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .09em;
    padding: 0 10px 10px;
}

.sidebar nav { display: flex; flex-direction: column; gap: 3px; }

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #f4efe6;
    text-decoration: none;
    padding: 11px 14px;
    font-size: 14px;
    border-radius: 8px;
    border-left: 3px solid transparent;
    transition: background .15s ease, transform .15s ease;
}
.sidebar nav a .sidebar__icono {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    flex-shrink: 0;
    transition: background .15s ease;
}
.sidebar nav a .sidebar__icono .icono { opacity: .85; }
.sidebar nav a:hover {
    background: rgba(255,255,255,0.10);
    transform: translateX(2px);
}
.sidebar nav a.activo {
    background: rgba(255,255,255,0.16);
    border-left-color: var(--color-beige-oscuro);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}
.sidebar nav a.activo .sidebar__icono {
    background: rgba(255,255,255,0.18);
}
.sidebar nav a.activo .sidebar__icono .icono { opacity: 1; }

.contenido {
    margin-left: var(--sidebar-ancho);
    margin-top: var(--topbar-alto);
    padding: 26px 30px;
}

.contenido--sin-sesion {
    margin-left: 0;
}

@media (max-width: 880px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.abierta { transform: translateX(0); }
    .contenido { margin-left: 0; }
    .topbar__toggle { display: block; }
}

/* ---------------------------------------------------------------
   Tarjetas / paneles genericos
   --------------------------------------------------------------- */
.card {
    background: var(--color-fondo-card);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    padding: 22px;
    box-shadow: var(--sombra);
    margin-bottom: 22px;
}

.card__titulo { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }

.grid-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 22px; }

.stat-tile {
    background: var(--color-fondo-card);
    border: 1px solid var(--color-borde);
    border-left: 5px solid var(--color-oliva);
    border-radius: var(--radio);
    padding: 18px;
    box-shadow: var(--sombra);
    transition: transform .15s ease, box-shadow .15s ease;
}
.stat-tile:hover { transform: translateY(-2px); box-shadow: var(--sombra-fuerte); }
.stat-tile__valor { font-size: 30px; font-weight: 700; color: var(--color-oliva-oscuro); }
.stat-tile__etiqueta { color: var(--color-texto-suave); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------
   Formularios
   --------------------------------------------------------------- */
.form-grupo { margin-bottom: 16px; }
.form-grupo label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 13.5px; color: var(--color-oliva-oscuro); }

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-borde);
    border-radius: 8px;
    background: #fff;
    font-size: 14px;
    color: var(--color-texto);
}
.form-control:focus { outline: none; border-color: var(--color-oliva); box-shadow: 0 0 0 3px rgba(107,111,58,0.18); }

select.form-control {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath fill='%236b6f3a' d='M1 1l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
    cursor: pointer;
}
select.form-control:hover { border-color: var(--color-oliva-claro); }

.form-error { color: var(--color-error); font-size: 12.5px; margin-top: 4px; display: block; min-height: 16px; }
.form-ayuda { color: var(--color-texto-suave); font-size: 12px; margin-top: 4px; display: block; }

.form-ancho-max { max-width: 440px; }

/* ---------------------------------------------------------------
   Portadas de libros (catalogo + dashboard)
   --------------------------------------------------------------- */
.libro-thumb {
    width: 42px;
    height: 58px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: var(--sombra);
    display: block;
}
.libro-thumb--vacio {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-beige-oscuro);
    color: var(--color-oliva);
    border: 1px dashed var(--color-borde);
}
.libro-thumb--vacio .icono { width: 20px; height: 20px; }

.libros-recientes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 16px;
}
.libro-portada {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--color-texto);
    background: var(--color-fondo);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    padding: 10px;
    transition: transform .15s ease, box-shadow .15s ease;
}
.libro-portada:hover { transform: translateY(-3px); box-shadow: var(--sombra); }
.libro-portada img,
.libro-portada__vacia {
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 8px;
}
.libro-portada__vacia {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, var(--color-oliva-claro) 0%, var(--color-oliva) 100%);
    color: #fff;
}
.libro-portada__vacia .icono { width: 36px; height: 36px; opacity: .9; }
.libro-portada__titulo { font-size: 13px; font-weight: 700; color: var(--color-oliva-oscuro); line-height: 1.25; }
.libro-portada__autor { font-size: 11.5px; color: var(--color-texto-suave); margin-top: 2px; }

/* ---------------------------------------------------------------
   Carrusel de "Novedades" del panel principal: muestra un libro a
   la vez y va rotando solo entre los ultimos agregados.
   --------------------------------------------------------------- */
.novedades-carrusel__viewport {
    overflow: hidden;
    border-radius: var(--radio);
    background: var(--color-beige-oscuro);
}
.novedades-carrusel__pista {
    display: flex;
    transition: transform .5s ease;
}
.novedades-slide {
    flex: 0 0 100%;
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 0;
    padding: 16px;
    text-decoration: none;
    color: var(--color-texto);
}
.novedades-slide__imagen { flex: 0 0 auto; width: 110px; }
.novedades-slide__imagen img,
.novedades-slide__imagen .libro-portada__vacia {
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: var(--sombra);
}
.novedades-slide__info { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.novedades-slide__titulo { font-size: 19px; font-weight: 700; color: var(--color-oliva-oscuro); line-height: 1.3; }
.novedades-slide__autor { font-size: 14px; color: var(--color-texto-suave); }
.novedades-carrusel__puntos { display: flex; justify-content: center; gap: 8px; margin-top: 12px; }
.novedades-carrusel__punto {
    width: 9px;
    height: 9px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: var(--color-borde);
    cursor: pointer;
    transition: background .2s ease, transform .2s ease;
}
.novedades-carrusel__punto:hover { background: var(--color-oliva-claro); }
.novedades-carrusel__punto.activo { background: var(--color-oliva); transform: scale(1.25); }

/* ---------------------------------------------------------------
   Catalogo para perfiles de solo lectura (Lector): filtros + tarjetas
   --------------------------------------------------------------- */
.filtro-catalogo { margin-bottom: 18px; }
.filtro-catalogo__botones { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

.chip-filtro-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-fondo-card);
    border: 1px solid var(--color-borde);
    color: var(--color-oliva-oscuro);
    font-weight: 600;
    font-size: 13.5px;
    padding: 9px 16px;
    border-radius: 999px;
    cursor: pointer;
    transition: background .15s ease, border-color .15s ease;
}
.chip-filtro-toggle:hover { background: var(--color-beige-oscuro); border-color: var(--color-oliva-claro); }
.chip-filtro-toggle .icono { width: 16px; height: 16px; }

.chip-filtro-limpiar {
    background: none;
    border: none;
    color: var(--color-oliva-oscuro);
    text-decoration: underline;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 9px 4px;
}

.filtro-catalogo__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    background: var(--color-fondo-card);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    padding: 14px;
    margin-top: 10px;
}
.chip-filtro {
    background: var(--color-beige-oscuro);
    border: 1px solid transparent;
    color: var(--color-oliva-oscuro);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
    cursor: pointer;
    transition: background .15s ease, color .15s ease;
}
.chip-filtro:hover { background: var(--color-oliva-claro); color: #fff; }
.chip-filtro.activo { background: var(--color-oliva); color: #fff; }

.catalogo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 20px;
}
.catalogo-tarjeta {
    background: var(--color-fondo-card);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    overflow: hidden;
    box-shadow: var(--sombra);
    transition: transform .15s ease, box-shadow .15s ease;
    display: flex;
    flex-direction: column;
}
.catalogo-tarjeta:hover { transform: translateY(-3px); box-shadow: var(--sombra-fuerte); }
.catalogo-tarjeta__imagen { aspect-ratio: 16 / 10; overflow: hidden; }
.catalogo-tarjeta__imagen img { width: 100%; height: 100%; object-fit: cover; display: block; }
.catalogo-tarjeta__imagen-vacia {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(160deg, var(--color-oliva-claro) 0%, var(--color-oliva) 100%);
    color: #fff;
}
.catalogo-tarjeta__imagen-vacia .icono { width: 34px; height: 34px; opacity: .9; }
.catalogo-tarjeta__cuerpo { padding: 16px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.catalogo-tarjeta__titulo { font-size: 16px; margin: 0; color: var(--color-oliva-oscuro); }
.catalogo-tarjeta__meta { font-size: 12.5px; color: var(--color-texto-suave); margin: 0; }
.catalogo-tarjeta__editorial { font-size: 12px; margin: 0 0 8px; }
.catalogo-tarjeta__pie { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.catalogo-tarjeta__accion {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 13px; font-weight: 700;
    color: var(--color-oliva-oscuro);
    text-decoration: none;
}
.catalogo-tarjeta__accion .icono { width: 15px; height: 15px; }
.catalogo-tarjeta__accion:hover { text-decoration: underline; }

.badge-disponible { background: #e3ecdf; color: var(--color-exito); }
.badge-agotado { background: #f3dede; color: var(--color-error); }

.pagina-auth {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--color-fondo) 0%, var(--color-beige-oscuro) 100%);
}
.pagina-auth .card { width: 100%; max-width: 420px; }
.pagina-auth__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 20px;
    font-weight: 800;
    color: var(--color-oliva-oscuro);
}
.pagina-auth__logo .icono { width: 22px; height: 22px; }
.pagina-auth__subtitulo { text-align: center; color: var(--color-texto-suave); margin-bottom: 22px; font-size: 13.5px; }

.icono-circulo {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--color-beige-oscuro);
    color: var(--color-oliva-oscuro);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.icono-circulo .icono { width: 28px; height: 28px; }

/* ---------------------------------------------------------------
   Login (pantalla de acceso con panel decorativo)
   --------------------------------------------------------------- */
.login-caja {
    width: 100%;
    max-width: 780px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--color-fondo-card);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 34px rgba(75, 77, 40, 0.18);
}
.login-panel {
    background: linear-gradient(160deg, var(--color-oliva) 0%, var(--color-oliva-oscuro) 100%);
    color: #f4efe6;
    padding: 46px 34px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.login-panel::before,
.login-panel::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    border: 1.5px solid rgba(244,239,230,0.18);
    pointer-events: none;
}
.login-panel::before { width: 280px; height: 280px; right: -100px; bottom: -120px; }
.login-panel::after { width: 170px; height: 170px; right: 20px; bottom: -70px; border-color: rgba(244,239,230,0.12); }
.login-panel__icono {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(244,239,230,0.14);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    position: relative;
}
.login-panel__icono .icono { width: 26px; height: 26px; }
.login-panel h2 { color: #fff; font-size: 24px; margin-bottom: 10px; }
.login-panel p { color: rgba(244,239,230,0.85); font-size: 14px; line-height: 1.5; position: relative; }
.login-form-lado { padding: 46px 38px; }
.login-form-lado .pagina-auth__logo,
.login-form-lado .pagina-auth__subtitulo { text-align: left; }

@media (max-width: 760px) {
    .login-caja { grid-template-columns: 1fr; max-width: 420px; }
    .login-panel { display: none; }
}

/* ---------------------------------------------------------------
   Botones
   --------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    border-radius: 10px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: filter .15s ease, transform .15s ease, box-shadow .15s ease;
}
.btn:hover { filter: brightness(0.94); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.btn-primario { background: var(--color-oliva); color: #fff; box-shadow: 0 4px 12px rgba(107,111,58,0.28); }
.btn-primario:hover { box-shadow: 0 6px 16px rgba(107,111,58,0.34); }
.btn-secundario { background: var(--color-beige-oscuro); color: var(--color-oliva-oscuro); }
.btn-peligro { background: var(--color-error); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--color-oliva); color: var(--color-oliva-oscuro); }
.btn-bloque { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }

/* ---------------------------------------------------------------
   Tablas
   --------------------------------------------------------------- */
.tabla-wrap { overflow-x: auto; }
table.tabla { width: 100%; border-collapse: collapse; font-size: 13.8px; }
table.tabla th, table.tabla td { padding: 10px 12px; border-bottom: 1px solid var(--color-borde); text-align: left; }
table.tabla th { background: var(--color-beige-oscuro); color: var(--color-oliva-oscuro); text-transform: uppercase; font-size: 12px; letter-spacing: .03em; }
table.tabla tbody tr:hover { background: #faf6ee; }
.tabla-acciones { display: flex; gap: 6px; flex-wrap: wrap; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 700; text-transform: uppercase; }
.badge-activo { background: #e3ecdf; color: var(--color-exito); }
.badge-baja { background: #f3dede; color: var(--color-error); }
.badge-prestado { background: #fdeecb; color: var(--color-advertencia); }
.badge-vencido { background: #f3dede; color: var(--color-error); }
.badge-devuelto { background: #e3ecdf; color: var(--color-exito); }
.badge-pendiente { background: #e6e9f5; color: var(--color-info); }
.badge-rechazado { background: #f3dede; color: var(--color-error); }

.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.buscador { max-width: 280px; }

/* ---------------------------------------------------------------
   Toasts (notificaciones propias, sin alert() nativo)
   --------------------------------------------------------------- */
#toast-contenedor {
    position: fixed;
    top: calc(var(--topbar-alto) + 16px);
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 340px;
}

.toast {
    background: var(--color-fondo-card);
    border-left: 5px solid var(--color-oliva);
    border-radius: 8px;
    padding: 14px 16px;
    box-shadow: var(--sombra);
    font-size: 13.5px;
    animation: entrada-toast .2s ease-out;
}
.toast-exito { border-left-color: var(--color-exito); }
.toast-error { border-left-color: var(--color-error); }
.toast-advertencia { border-left-color: var(--color-advertencia); }
.toast-info { border-left-color: var(--color-info); }
.toast__titulo { font-weight: 700; margin-bottom: 2px; display: block; }

@keyframes entrada-toast {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
.toast.saliendo { animation: salida-toast .2s ease-in forwards; }
@keyframes salida-toast { to { opacity: 0; transform: translateX(20px); } }

/* ---------------------------------------------------------------
   Modal propio (confirmaciones, en vez de confirm() nativo)
   --------------------------------------------------------------- */
.modal-fondo {
    position: fixed; inset: 0;
    background: rgba(58, 53, 42, 0.55);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 500;
}
.modal-fondo.visible { display: flex; }
.modal-caja {
    background: var(--color-fondo-card);
    border-radius: var(--radio);
    padding: 24px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--sombra);
}
.modal-caja h3 { margin-bottom: 10px; }
.modal-acciones { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ---------------------------------------------------------------
   Imagen ampliada (lightbox) de la portada de un libro
   --------------------------------------------------------------- */
.catalogo-tarjeta__imagen-click { cursor: zoom-in; }
.modal-caja--imagen {
    background: transparent;
    box-shadow: none;
    padding: 0;
    max-width: 90vw;
    width: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    position: relative;
}
.modal-caja--imagen img {
    max-width: 90vw;
    max-height: 80vh;
    border-radius: var(--radio);
    box-shadow: var(--sombra-fuerte);
    display: block;
}
.modal-caja--imagen p { color: #f4efe6; }
.modal-imagen-cerrar {
    position: absolute;
    top: -14px;
    right: -14px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--color-fondo-card);
    color: var(--color-oliva-oscuro);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    box-shadow: var(--sombra);
}
.modal-imagen-cerrar:hover { background: var(--color-beige-oscuro); }

/* ---------------------------------------------------------------
   Calificación por estrellas de los lectores
   --------------------------------------------------------------- */
.estrellas { color: var(--color-advertencia); letter-spacing: 1px; }

/* ---------------------------------------------------------------
   Alerta de error centrada (para errores importantes como la
   politica de contraseña: mas visible que un toast al costado)
   --------------------------------------------------------------- */
.alerta-error-fondo {
    position: fixed; inset: 0;
    background: rgba(58, 53, 42, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: entrada-alerta-error .15s ease-out;
    padding: 16px;
}
.alerta-error-caja {
    background: var(--color-fondo-card);
    border-radius: var(--radio);
    padding: 28px 26px 24px;
    width: 100%;
    max-width: 380px;
    box-shadow: var(--sombra);
    text-align: center;
}
.alerta-error-icono { width: 50px; height: 50px; margin: 0 auto 14px; color: var(--color-error); }
.alerta-error-titulo { font-weight: 700; font-size: 17px; margin-bottom: 8px; color: var(--color-texto); }
.alerta-error-mensaje { color: var(--color-texto-suave); font-size: 14px; margin-bottom: 22px; line-height: 1.4; }
.alerta-error-caja .btn { width: 100%; }
@keyframes entrada-alerta-error {
    from { opacity: 0; } to { opacity: 1; }
}
.alerta-error-fondo.saliendo { animation: salida-alerta-error .15s ease-in forwards; }
@keyframes salida-alerta-error { to { opacity: 0; } }

/* ---------------------------------------------------------------
   Utilidades
   --------------------------------------------------------------- */
.texto-suave { color: var(--color-texto-suave); }
.texto-centro { text-align: center; }
.mt-0 { margin-top: 0; } .mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; }
.oculto { display: none !important; }

/* ---------------------------------------------------------------
   Recomendador de libros con IA
   --------------------------------------------------------------- */
.recomendador-ia__titulo { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.recomendador-ia__titulo svg { width: 20px; height: 20px; color: var(--color-advertencia); }
.recomendador-ia__form { display: flex; gap: 10px; align-items: flex-start; flex-wrap: wrap; margin-top: 10px; }
.recomendador-ia__form textarea {
    flex: 1 1 260px;
    min-width: 220px;
    padding: 10px 12px;
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    font-family: inherit;
    resize: vertical;
}
.recomendador-ia__resultado {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: var(--radio);
    background: var(--color-fondo-suave, var(--color-beige-oscuro));
    white-space: pre-line;
    line-height: 1.5;
}
.recomendador-ia__resultado--error { color: var(--color-peligro, #b3261e); }
.chip-permiso { display:inline-flex; align-items:center; gap:6px; background:var(--color-beige-oscuro); padding:4px 10px; border-radius:20px; font-size:12px; margin:2px; }