:root {
    --azul-oscuro: #0f3a5c;
    --azul-medio: #1d5a8a;
    --azul-principal: #2563eb;
    --verde: #059669;
    --morado: #7c3aed;
    --fondo: #f4f7fb;
    --texto: #1a2332;
    --texto-suave: #64748b;
    --borde: #e2e8f0;
    --blanco: #ffffff;
    --radio: 16px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--fondo);
    color: var(--texto);
}

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

/* ---------- Login / Setup ---------- */
.pagina-login {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(160deg, var(--azul-oscuro), var(--azul-medio));
}
.tarjeta-login {
    background: var(--blanco);
    padding: 40px 32px;
    border-radius: var(--radio);
    width: 100%;
    max-width: 380px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.logo-login { font-size: 40px; }
.tarjeta-login h1 { margin: 8px 0 0; font-size: 22px; }
.subtitulo { color: var(--texto-suave); margin: 4px 0 24px; font-size: 14px; }
.tarjeta-login form { text-align: left; }
.tarjeta-login label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }
.tarjeta-login input {
    width: 100%; padding: 12px 14px; border: 1px solid var(--borde);
    border-radius: 10px; font-size: 15px;
}
.boton {
    display: inline-block; width: 100%; margin-top: 22px; padding: 13px;
    background: var(--azul-principal); color: white; border: none;
    border-radius: 10px; font-size: 15px; font-weight: 600; cursor: pointer;
    text-align: center;
}
.boton:hover { background: #1d4fd1; }
.error { background: #fee2e2; color: #b91c1c; padding: 10px; border-radius: 8px; font-size: 14px; }

/* ---------- Encabezado ---------- */
.encabezado {
    background: var(--blanco);
    padding: 16px 20px;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}
.fila-superior { display: flex; align-items: center; gap: 12px; }
.boton-menu { background: none; border: none; font-size: 22px; cursor: pointer; }
.saludo { flex: 1; font-size: 19px; margin: 0; }
.acciones-superior { display: flex; align-items: center; gap: 10px; }
.icono-boton {
    width: 38px; height: 38px; border-radius: 50%; background: var(--fondo);
    border: none; display: flex; align-items: center; justify-content: center;
    font-size: 16px; cursor: pointer; position: relative;
}
.avatar {
    width: 38px; height: 38px; border-radius: 50%; background: var(--azul-principal);
    color: white; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px;
}
.barra-busqueda {
    display: flex; align-items: center; gap: 8px; background: var(--fondo);
    border-radius: 12px; padding: 12px 14px; margin-top: 14px;
}
.barra-busqueda input {
    border: none; background: none; outline: none; width: 100%; font-size: 14px;
}

/* ---------- Menú lateral ---------- */
.menu-lateral {
    position: fixed; top: 0; left: -260px; width: 240px; height: 100%;
    background: var(--azul-oscuro); padding: 24px 16px; display: flex;
    flex-direction: column; gap: 4px; transition: left 0.25s ease; z-index: 100;
}
.menu-lateral.abierto { left: 0; }
.menu-lateral a { color: #cbd8e6; padding: 10px 12px; border-radius: 8px; font-size: 15px; }
.menu-lateral a:hover { background: rgba(255,255,255,0.08); color: white; }
.menu-lateral hr { border-color: rgba(255,255,255,0.15); width: 100%; }

/* ---------- Contenido ---------- */
.contenido { padding: 20px; max-width: 1000px; margin: 0 auto; }
.titulo-pagina { font-size: 22px; margin-bottom: 16px; }

.banner-bienvenida {
    background: linear-gradient(135deg, var(--azul-oscuro), var(--azul-medio));
    color: white; padding: 28px; border-radius: var(--radio); margin: 20px 0;
}
.etiqueta {
    background: rgba(255,255,255,0.15); padding: 5px 12px; border-radius: 20px; font-size: 12px;
}
.banner-bienvenida h1 { margin: 14px 0 8px; font-size: 26px; }
.banner-bienvenida p { color: #d7e4f2; max-width: 480px; }
.enlace-banner {
    display: inline-block; margin-top: 16px; background: rgba(255,255,255,0.15);
    padding: 10px 18px; border-radius: 10px; font-weight: 600;
}

.tarjetas-resumen { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px,1fr)); gap: 14px; margin: 20px 0; }
.tarjeta-resumen {
    background: white; border-radius: var(--radio); padding: 18px; display: flex;
    align-items: center; gap: 12px; box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}
.tarjeta-resumen strong { display: block; font-size: 20px; }
.tarjeta-resumen span { color: var(--texto-suave); font-size: 13px; }
.icono-tarjeta { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.fondo-azul { background: #dbeafe; } .fondo-verde { background: #d1fae5; } .fondo-morado { background: #ede9fe; }

.seccion { margin: 32px 0; }
.titulo-seccion { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.titulo-seccion h3 { margin: 0; font-size: 17px; }
.titulo-seccion a { color: var(--azul-principal); font-size: 14px; font-weight: 600; }

.filtros-categoria { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.chip {
    padding: 8px 14px; border-radius: 20px; background: white; border: 1px solid var(--borde);
    font-size: 13px; font-weight: 600;
}
.chip.activo { background: var(--azul-principal); color: white; border-color: var(--azul-principal); }

.rejilla-videos { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 16px; }
.tarjeta-video {
    background: white; border-radius: var(--radio); overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04); display: block;
}
.miniatura-video {
    background: linear-gradient(160deg, var(--azul-oscuro), var(--azul-medio));
    height: 120px; display: flex; align-items: center; justify-content: center;
    color: white; font-size: 28px; position: relative;
}
.insignia-completado {
    position: absolute; top: 8px; right: 8px; background: var(--verde); color: white;
    width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center;
    justify-content: center; font-size: 12px;
}
.etiqueta-categoria {
    display: inline-block; font-size: 11px; font-weight: 700; padding: 3px 10px;
    border-radius: 20px; margin: 10px 12px 0;
}
.tarjeta-video h4 { margin: 8px 12px 14px; font-size: 14px; }
.vacio { color: var(--texto-suave); padding: 20px 0; }

.lista-documentos { display: flex; flex-direction: column; gap: 10px; }
.fila-documento {
    background: white; border-radius: 14px; padding: 14px; display: flex;
    align-items: center; gap: 14px; box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}
.icono-documento { font-size: 22px; }
.info-documento h4 { margin: 0 0 4px; font-size: 14px; }
.info-documento p { margin: 0; font-size: 12px; color: var(--texto-suave); }

.lista-noticias { display: flex; flex-direction: column; gap: 12px; }
.tarjeta-noticia { background: white; border-radius: 14px; padding: 16px; box-shadow: 0 2px 10px rgba(0,0,0,0.04); }
.tarjeta-noticia h4 { margin: 0 0 6px; }
.tarjeta-noticia p { margin: 0 0 8px; font-size: 14px; color: #475569; }
.tarjeta-noticia .fecha { font-size: 12px; color: var(--texto-suave); }
.imagen-noticia { width: 100%; border-radius: 10px; margin-bottom: 10px; }

.contenedor-video { border-radius: var(--radio); overflow: hidden; margin-bottom: 16px; background: black; }
.contenedor-video video { width: 100%; display: block; max-height: 480px; }
.titulo-video { margin: 12px 0 6px; }
.descripcion-video { color: #475569; }
.enlace-volver { display: inline-block; margin-bottom: 14px; color: var(--azul-principal); font-weight: 600; }

/* ---------- Panel admin ---------- */
.tabla-admin { width: 100%; border-collapse: collapse; background: white; border-radius: 14px; overflow: hidden; }
.tabla-admin th, .tabla-admin td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--borde); font-size: 14px; }
.tabla-admin th { background: var(--fondo); font-size: 12px; text-transform: uppercase; color: var(--texto-suave); }
.barra-acciones-admin { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.boton-secundario { background: white; border: 1px solid var(--borde); padding: 9px 16px; border-radius: 10px; font-weight: 600; font-size: 13px; }
.boton-peligro { color: #dc2626; }
.formulario-admin { background: white; padding: 20px; border-radius: var(--radio); max-width: 520px; }
.formulario-admin label { display: block; font-weight: 600; font-size: 13px; margin: 14px 0 6px; }
.formulario-admin input, .formulario-admin textarea, .formulario-admin select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--borde); border-radius: 8px; font-size: 14px; font-family: inherit;
}
.tarjetas-admin-resumen { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px,1fr)); gap: 14px; margin-bottom: 24px; }

.fondo-menu {
    display: none;
    position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 99;
}
.fondo-menu.visible { display: block; }
.menu-lateral { box-shadow: 4px 0 20px rgba(0,0,0,0.15); }
.boton-cerrar-menu {
    display: block; margin-left: auto; background: none; border: none;
    color: white; font-size: 22px; cursor: pointer; padding: 0 0 12px;
}

/* ---------- Barra de progreso en tarjetas de video ---------- */
.mini-barra-progreso {
    height: 4px; background: #e2e8f0; margin: 0 12px; border-radius: 4px; overflow: hidden;
}
.mini-relleno { height: 100%; background: var(--verde); border-radius: 4px; }
.miniatura-video { background-size: cover; background-position: center; }

/* ---------- Barra de progreso en la página del video ---------- */
.barra-progreso-video {
    height: 8px; background: #e2e8f0; border-radius: 6px; overflow: hidden; margin-top: 4px;
}
.relleno-progreso { height: 100%; background: var(--verde); border-radius: 6px; transition: width 0.3s; }
.texto-progreso { font-size: 12px; color: var(--texto-suave); margin: 6px 0 16px; }

/* ---------- Comentarios ---------- */
.seccion-comentarios { margin-top: 28px; }
.formulario-comentario { display: flex; gap: 10px; margin-bottom: 18px; align-items: flex-start; }
.formulario-comentario textarea {
    flex: 1; padding: 10px 12px; border: 1px solid var(--borde); border-radius: 10px;
    font-family: inherit; font-size: 14px; resize: vertical;
}
.lista-comentarios { display: flex; flex-direction: column; gap: 14px; }
.comentario { display: flex; gap: 12px; background: white; padding: 14px; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,0.04); }
.avatar-comentario {
    flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%; background: var(--azul-principal);
    color: white; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700;
}
.comentario strong { font-size: 14px; }
.fecha-comentario { font-size: 11px; color: var(--texto-suave); margin-left: 8px; }
.comentario p { margin: 4px 0 0; font-size: 14px; color: #334155; }

/* ---------- Documentos gráficos ---------- */
.pestanas-documentos { display: flex; gap: 4px; border-bottom: 2px solid var(--borde); margin-bottom: 20px; overflow-x: auto; }
.pestana { padding: 10px 16px; font-size: 14px; font-weight: 600; color: var(--texto-suave); white-space: nowrap; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.pestana.activa { color: var(--azul-principal); border-color: var(--azul-principal); }

.rejilla-documentos { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 16px; }
.tarjeta-documento {
    background: white; border-radius: var(--radio); overflow: hidden; cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04); display: flex; flex-direction: column;
}
.vista-doc {
    height: 140px; display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative;
}
.vista-doc img { width: 100%; height: 100%; object-fit: cover; }
.vista-doc embed { width: 100%; height: 260px; margin-top: -60px; pointer-events: none; }
.icono-doc-grande { font-size: 42px; }
.etiqueta-tipo-doc { font-size: 10px; font-weight: 700; padding: 3px 10px; border-radius: 20px; margin: 10px 12px 0; align-self: flex-start; }
.tarjeta-documento h4 { margin: 8px 12px 2px; font-size: 14px; }
.descripcion-doc { margin: 0 12px 10px; font-size: 12px; color: var(--texto-suave); flex: 1; }
.enlace-descarga { margin: 0 12px 14px; font-size: 12px; font-weight: 700; color: var(--azul-principal); }

/* ---------- Modal de vista previa ---------- */
.modal-vista-previa {
    display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 200;
    align-items: center; justify-content: center; padding: 20px;
}
.modal-vista-previa.visible { display: flex; }
.contenido-modal { background: white; border-radius: 16px; max-width: 800px; width: 100%; padding: 16px; position: relative; }
.cerrar-modal { position: absolute; top: 10px; right: 14px; background: none; border: none; font-size: 22px; cursor: pointer; z-index: 2; }