/* ==========================================================================
   LISTAS DE CANCIONES — sistema compartido (rkb-nav-*)
   --------------------------------------------------------------------------
   Lo usan dos páginas: la lista de Navidad (single-navidad.php) y la del Día
   del Padre (single-padre.php). El prefijo se quedó en `rkb-nav-` por la
   primera que lo estrenó, pero el bloque no sabe de qué fiesta se trata: es
   un listado de canciones con barra de secciones, buscador y fichas.

   Lo que sea propio de una sola página va en su propio archivo
   (rkb-padre.css), no aquí.

   Escrito mobile-first: primero el móvil, y a partir de 760px se abren las
   columnas. Nada de anchos fijos en píxeles para el texto.
   ========================================================================== */

.rkb-nav {
	--nav-bg: #0a080d;
	--nav-panel: #14111a;
	--nav-panel-2: #1b1724;
	--nav-line: rgba(255, 255, 255, .1);
	--nav-line-2: rgba(255, 255, 255, .18);
	--nav-text: #f7f1e7;
	--nav-muted: #bcb5aa;
	--nav-red: #e3262e;
	--nav-gold: #f3c347;
	--nav-radio: 16px;

	position: relative;
	background: var(--nav-bg);
	color: var(--nav-text);
	font-size: 1rem;
	line-height: 1.7;
	padding-bottom: 3rem;
	/* `clip` y no `hidden`: `overflow-x: hidden` rompe el `position: sticky`
	   de la barra de secciones. */
	overflow-x: clip;
}

/* Luz de temporada: dos manchas suaves, roja y dorada, fijas al fondo. */
.rkb-nav::before {
	content: "";
	position: absolute;
	inset: 0 0 auto;
	height: 70vh;
	pointer-events: none;
	background:
		radial-gradient(ellipse 60% 50% at 78% -10%, rgba(243, 195, 71, .16), transparent 68%),
		radial-gradient(ellipse 70% 55% at 12% 0%, rgba(227, 38, 46, .2), transparent 70%);
}

.rkb-nav-wrap {
	position: relative;
	width: 100%;
	max-width: 1080px;
	margin: 0 auto;
	padding: 0 1.15rem;
}

/* --------------------------------------------------------------------------
   Cabecera
   -------------------------------------------------------------------------- */

.rkb-nav-hero {
	position: relative;
	padding: 2.2rem 0 1.4rem;
}

.rkb-nav-kicker {
	display: inline-flex;
	align-items: center;
	gap: .5rem;
	margin: 0 0 .9rem;
	padding: .35rem .8rem;
	border: 1px solid rgba(243, 195, 71, .4);
	border-radius: 999px;
	background: rgba(243, 195, 71, .1);
	color: var(--nav-gold);
	font-size: .78rem;
	font-weight: 800;
	letter-spacing: .08em;
	text-transform: uppercase;
}

.rkb-nav-kicker__dot {
	width: .45rem;
	height: .45rem;
	border-radius: 999px;
	background: var(--nav-red);
	box-shadow: 0 0 0 3px rgba(227, 38, 46, .25);
}

.rkb-nav-h1 {
	margin: 0 0 1rem;
	font-size: clamp(1.9rem, 8vw, 3.1rem);
	line-height: 1.08;
	letter-spacing: -.02em;
	font-weight: 900;
	text-wrap: balance;
}

.rkb-nav-lead {
	max-width: 62ch;
	margin: 0 0 1.5rem;
	color: var(--nav-muted);
	font-size: 1.02rem;
	line-height: 1.75;
}

.rkb-nav-acciones {
	display: flex;
	flex-wrap: wrap;
	gap: .6rem;
	margin-bottom: 1.8rem;
}

.rkb-nav-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 48px;
	padding: .8rem 1.25rem;
	border-radius: 999px;
	font-size: .95rem;
	font-weight: 800;
	text-decoration: none;
	transition: transform .18s ease, filter .18s ease, border-color .18s ease;
}

.rkb-nav-btn--primary {
	background: linear-gradient(135deg, var(--nav-gold), #e8a51c);
	color: #14100c;
}

.rkb-nav-btn--ghost {
	border: 1px solid var(--nav-line-2);
	color: var(--nav-text);
}

.rkb-nav-btn:hover,
.rkb-nav-btn:focus-visible {
	transform: translateY(-1px);
	filter: brightness(1.06);
}

.rkb-nav-heroimg {
	margin: 0;
	border: 1px solid var(--nav-line);
	border-radius: var(--nav-radio);
	overflow: hidden;
	background: var(--nav-panel);
}

.rkb-nav-heroimg img {
	display: block;
	width: 100%;
	height: auto;
}

/* --------------------------------------------------------------------------
   Barra de secciones
   --------------------------------------------------------------------------
   Por encima de 760px se pega bajo la cabecera del sitio (66px). En el móvil
   se queda estática para no comerse media pantalla. */

.rkb-nav-tabs {
	position: sticky;
	top: 66px;
	z-index: 20;
	margin: 0 0 1.6rem;
	border-top: 1px solid var(--nav-line);
	border-bottom: 1px solid var(--nav-line);
	background: rgba(10, 8, 13, .94);
	backdrop-filter: blur(10px);
}

.rkb-nav-tabs__inner {
	display: flex;
	gap: .35rem;
	max-width: 1080px;
	margin: 0 auto;
	padding: .5rem .8rem;
	overflow-x: auto;
	scrollbar-width: none;
	-webkit-overflow-scrolling: touch;
}

.rkb-nav-tabs__inner::-webkit-scrollbar { display: none; }

.rkb-nav-tabs a {
	flex: 0 0 auto;
	padding: .5rem .85rem;
	border-radius: 999px;
	color: var(--nav-muted);
	font-size: .86rem;
	font-weight: 700;
	white-space: nowrap;
	text-decoration: none;
}

.rkb-nav-tabs a:hover,
.rkb-nav-tabs a:focus-visible {
	background: rgba(255, 255, 255, .07);
	color: var(--nav-text);
}

/* --------------------------------------------------------------------------
   Secciones
   -------------------------------------------------------------------------- */

.rkb-nav-sec {
	position: relative;
	padding: 2.4rem 0;
	border-top: 1px solid var(--nav-line);
	scroll-margin-top: 120px;
}

.rkb-nav-h2 {
	display: flex;
	align-items: baseline;
	gap: .7rem;
	margin: 0 0 .8rem;
	font-size: clamp(1.35rem, 5.4vw, 1.9rem);
	line-height: 1.2;
	font-weight: 900;
	letter-spacing: -.01em;
	text-wrap: balance;
}

.rkb-nav-h2__num {
	flex: 0 0 auto;
	color: var(--nav-red);
	font-size: .82rem;
	font-weight: 900;
	letter-spacing: .1em;
}

.rkb-nav-intro {
	max-width: 66ch;
	margin: 0 0 1.5rem;
	color: var(--nav-muted);
}

.rkb-nav-intro strong { color: var(--nav-text); }

.rkb-nav-nota {
	margin: 1.4rem 0 0;
	color: var(--nav-muted);
	font-size: .9rem;
}

/* --------------------------------------------------------------------------
   Reproductor
   -------------------------------------------------------------------------- */

.rkb-nav-player {
	border: 1px solid var(--nav-line);
	border-radius: var(--nav-radio);
	background: linear-gradient(160deg, var(--nav-panel), var(--nav-panel-2));
	overflow: hidden;
}

.rkb-nav-player__tabs {
	display: flex;
	gap: .3rem;
	padding: .5rem;
	border-bottom: 1px solid var(--nav-line);
}

.rkb-nav-player__tab {
	flex: 1 1 0;
	min-height: 44px;
	padding: .55rem .5rem;
	border: 1px solid transparent;
	border-radius: 10px;
	background: transparent;
	color: var(--nav-muted);
	font-family: inherit;
	font-size: .88rem;
	font-weight: 800;
	cursor: pointer;
}

.rkb-nav-player__tab[aria-selected="true"] {
	border-color: rgba(243, 195, 71, .45);
	background: rgba(243, 195, 71, .14);
	color: var(--nav-text);
}

.rkb-nav-player__stage { padding: .5rem; }

.rkb-nav-player__frame {
	display: block;
	width: 100%;
	border: 0;
	border-radius: 10px;
}

.rkb-nav-player__idle {
	padding: 2rem 1.2rem;
	text-align: center;
	color: var(--nav-muted);
}

.rkb-nav-player__icon {
	display: grid;
	place-items: center;
	width: 3.2rem;
	height: 3.2rem;
	margin: 0 auto .9rem;
	border-radius: 999px;
	background: rgba(243, 195, 71, .16);
	color: var(--nav-gold);
	font-size: 1.1rem;
}

.rkb-nav-player__idle p { margin: 0 0 .8rem; }

.rkb-nav-player__links {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: .5rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rkb-nav-player__links a {
	display: inline-block;
	padding: .45rem .9rem;
	border: 1px solid var(--nav-line-2);
	border-radius: 999px;
	color: var(--nav-text);
	font-size: .84rem;
	font-weight: 700;
	text-decoration: none;
}

/* --------------------------------------------------------------------------
   Buscador
   -------------------------------------------------------------------------- */

.rkb-nav-buscador { margin-bottom: 1.1rem; }

.rkb-nav-buscador__label {
	display: block;
	margin-bottom: .45rem;
	color: var(--nav-muted);
	font-size: .82rem;
	font-weight: 700;
	letter-spacing: .04em;
	text-transform: uppercase;
}

.rkb-nav-buscador__campo {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: .6rem;
	padding: .5rem .75rem;
	border: 1px solid var(--nav-line);
	border-radius: 12px;
	background: var(--nav-panel);
}

.rkb-nav-buscador__campo input {
	flex: 1 1 12rem;
	min-width: 0;
	min-height: 40px;
	border: 0;
	background: transparent;
	color: var(--nav-text);
	font-family: inherit;
	font-size: 1rem;
}

.rkb-nav-buscador__campo input::placeholder { color: rgba(188, 181, 170, .7); }

.rkb-nav-buscador__campo input:focus {
	outline: 2px solid rgba(243, 195, 71, .55);
	outline-offset: 2px;
	border-radius: 8px;
}

.rkb-nav-buscador__cuenta {
	flex: 0 0 auto;
	color: var(--nav-gold);
	font-size: .82rem;
	font-weight: 800;
	white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Lista de canciones
   -------------------------------------------------------------------------- */

.rkb-nav-songs {
	display: grid;
	/* `start` y no `stretch`: al abrir una ficha no debe estirar la de al lado. */
	align-items: start;
	gap: .4rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rkb-nav-song {
	border: 1px solid var(--nav-line);
	border-radius: 10px;
	background: var(--nav-panel);
	overflow: hidden;
}

.rkb-nav-song[hidden] { display: none; }

.rkb-nav-song__det[open] { background: rgba(243, 195, 71, .05); }

.rkb-nav-song__sum {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto auto;
	align-items: baseline;
	gap: .7rem;
	min-height: 48px;
	padding: .7rem .85rem;
	cursor: pointer;
	list-style: none;
}

.rkb-nav-song__sum::-webkit-details-marker { display: none; }

.rkb-nav-song__sum::after {
	content: "+";
	color: var(--nav-gold);
	font-size: 1.05rem;
	line-height: 1;
}

.rkb-nav-song__det[open] .rkb-nav-song__sum::after { content: "−"; }

.rkb-nav-song__num {
	flex: 0 0 auto;
	color: rgba(188, 181, 170, .65);
	font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
	font-size: .78rem;
	font-weight: 700;
}

.rkb-nav-song__txt {
	display: flex;
	flex-direction: column;
	min-width: 0;
	line-height: 1.35;
}

.rkb-nav-song__titulo {
	color: var(--nav-text);
	font-weight: 700;
	overflow-wrap: anywhere;
}

.rkb-nav-song__artista {
	color: var(--nav-muted);
	font-size: .86rem;
	overflow-wrap: anywhere;
}

.rkb-nav-song__anio {
	color: var(--nav-gold);
	font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
	font-size: .8rem;
	font-weight: 800;
}

/* Ficha desplegada: año, publicación y curiosidad. */
.rkb-nav-song__ficha {
	margin: 0 .85rem .9rem;
	padding-top: .7rem;
	border-top: 1px solid var(--nav-line);
}

.rkb-nav-song__pub {
	margin: 0 0 .45rem;
	color: var(--nav-gold);
	font-size: .82rem;
	font-weight: 700;
	line-height: 1.5;
}

.rkb-nav-song__nota {
	margin: 0;
	color: var(--nav-muted);
	font-size: .92rem;
	line-height: 1.65;
}

.rkb-nav-vacio {
	margin: 1rem 0 0;
	padding: .9rem 1rem;
	border: 1px dashed var(--nav-line-2);
	border-radius: 10px;
	color: var(--nav-muted);
	font-size: .92rem;
}

/* --------------------------------------------------------------------------
   Cinco para empezar
   -------------------------------------------------------------------------- */

.rkb-nav-cards {
	display: grid;
	gap: .8rem;
}

.rkb-nav-card {
	position: relative;
	padding: 1.15rem 1.2rem;
	border: 1px solid var(--nav-line);
	border-radius: var(--nav-radio);
	background: linear-gradient(160deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
}

.rkb-nav-card::before {
	content: "";
	position: absolute;
	inset: 0 0 auto;
	height: 2px;
	background: linear-gradient(90deg, var(--nav-gold), var(--nav-red));
	opacity: .8;
}

.rkb-nav-card__titulo {
	margin: 0 0 .2rem;
	font-size: 1.02rem;
	font-weight: 800;
	line-height: 1.3;
}

.rkb-nav-card__artista {
	margin: 0 0 .6rem;
	color: var(--nav-gold);
	font-size: .82rem;
	font-weight: 800;
	letter-spacing: .03em;
	text-transform: uppercase;
}

.rkb-nav-card__texto {
	margin: 0;
	color: var(--nav-muted);
	font-size: .93rem;
}

/* --------------------------------------------------------------------------
   Preguntas frecuentes
   -------------------------------------------------------------------------- */

.rkb-nav-faq {
	display: grid;
	gap: .5rem;
}

.rkb-nav-faq__item {
	border: 1px solid var(--nav-line);
	border-radius: 12px;
	background: var(--nav-panel);
}

.rkb-nav-faq__item summary {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	min-height: 48px;
	padding: .9rem 1rem;
	font-weight: 800;
	cursor: pointer;
	list-style: none;
}

.rkb-nav-faq__item summary::-webkit-details-marker { display: none; }

.rkb-nav-faq__item summary::after {
	content: "+";
	flex: 0 0 auto;
	color: var(--nav-gold);
	font-size: 1.2rem;
	line-height: 1;
}

.rkb-nav-faq__item[open] summary::after { content: "−"; }

.rkb-nav-faq__item p {
	margin: 0;
	padding: 0 1rem 1rem;
	color: var(--nav-muted);
	font-size: .95rem;
}

/* --------------------------------------------------------------------------
   Tabletas y escritorio
   -------------------------------------------------------------------------- */

@media (min-width: 760px) {
	.rkb-nav-wrap { padding: 0 2rem; }

	.rkb-nav-hero { padding: 3rem 0 2rem; }

	.rkb-nav-acciones { margin-bottom: 2.2rem; }

	.rkb-nav-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }

	.rkb-nav-songs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
	.rkb-nav-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }

	/* En escritorio la quinta tarjeta se queda sola: ocupa el hueco libre. */
	.rkb-nav-card:last-child:nth-child(3n + 2) { grid-column: span 2; }
}

/* --------------------------------------------------------------------------
   Pestaña de plataforma sin reproductor incrustado
   --------------------------------------------------------------------------
   Amazon Music no ofrece iframe, así que su pestaña es un enlace que abre en
   ventana nueva. El estilo base está pensado para un <button>, que centra el
   texto solo; un <a> no.
   ------------------------------------------------------------------------ */

.rkb-nav-player__tab--ext {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .35rem;
    text-decoration: none;
}

.rkb-nav-player__tab--ext:hover,
.rkb-nav-player__tab--ext:focus-visible {
    border-color: rgba(243, 195, 71, .45);
    background: rgba(243, 195, 71, .1);
    color: var(--nav-gold);
}

.rkb-nav-ext {
    font-size: .78em;
    line-height: 1;
    opacity: .75;
}

/* --------------------------------------------------------------------------
   Modo embed (WebView de la app): no hay cabecera del sitio, así que sobran
   los 66px de despeje de la barra de secciones.
   -------------------------------------------------------------------------- */

.rkb-embed .rkb-nav-tabs { top: 0; }

/* Sin cabecera del sitio, los 120px de despeje de las secciones sobran: la
   barra de secciones sola mide unos 48px. */
.rkb-embed .rkb-nav-sec { scroll-margin-top: 72px; }

.rkb-embed .rkb-nav-hero { padding-top: calc(1.6rem + env(safe-area-inset-top, 0px)); }

.rkb-embed .rkb-nav { padding-bottom: calc(3rem + env(safe-area-inset-bottom, 0px)); }