:root {
    --bg: #0a0a0a;
    --bg-2: #111111;
    --fg: #ffffff;
    --fg-dim: rgba(255, 255, 255, 0.6);
    --fg-faint: rgba(255, 255, 255, 0.35);
    --glass-bg: rgba(20, 20, 20, 0.55);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-shine: rgba(255, 255, 255, 0.08);
    --ease: cubic-bezier(0.25, 0.8, 0.25, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { scroll-behavior: smooth; background: var(--bg); }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--fg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============ TOP BAR (era / about pages) ============ */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
    background: transparent;
    transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
    border-bottom: 1px solid transparent;
}

.topbar::before {
    content: "";
    position: absolute;
    inset: 0 0 -24px 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.15) 60%, transparent 100%);
    pointer-events: none;
    transition: opacity 0.4s var(--ease);
}

.topbar.scrolled {
    background: rgba(8, 8, 8, 0.78);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

.topbar.scrolled::before { opacity: 0; }

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 18px;
    max-width: 1600px;
    margin: 0 auto;
    position: relative;
}

.topbar-back {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.topbar-back:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
}

.topbar-logo-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
}

.topbar-logo-center img {
    height: 60px;
    width: auto;
    display: block;
    filter: drop-shadow(0 2px 6px rgba(0,0,0,0.6));
}

.topbar-credit {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 6px 14px 6px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.topbar-credit:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.16);
}

/* --- menú de redes del crédito "by Nsqkcharts" --- */
.topbar-credit-wrap { position: relative; display: inline-flex; }
.topbar-credit { cursor: pointer; }
.topbar-credit-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 186px;
    padding: 8px;
    border-radius: 16px;
    background: rgba(16, 16, 16, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
    box-shadow: 0 20px 44px -16px rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    gap: 2px;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
    z-index: 1200;
}
.topbar-credit-wrap.open .topbar-credit-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.topbar-credit-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: 11px;
    color: var(--fg);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s var(--ease);
}
.topbar-credit-menu a:hover { background: rgba(255, 255, 255, 0.08); }
.topbar-credit-menu svg { width: 18px; height: 18px; flex-shrink: 0; }

.topbar-credit-label {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--fg-faint);
}

.logo-charts-img {
    height: 24px;
    width: auto;
    display: block;
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.5));
}

@media (min-width: 820px) {
    .topbar-inner { padding: 14px 32px; }
    .topbar-logo-center img { height: 78px; }
    .logo-charts-img { height: 28px; }
}

/* ============ HERO ============ */
.era-hero {
    position: relative;
    min-height: 90vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 32px 24px 80px;
}

.era-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: brightness(0.5) saturate(1.1);
}

.era-hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(0,0,0,0.5) 0%, transparent 30%, var(--bg) 100%);
}

.era-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

.era-hero-number {
    display: inline-block;
    font-family: 'Bricolage Grotesque', sans-serif;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.3em;
    color: var(--fg-dim);
    padding: 6px 14px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 999px;
    margin-bottom: 24px;
    backdrop-filter: blur(12px);
}

.era-hero-title {
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: clamp(52px, 16vw, 160px);
    line-height: 0.9;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
}

.era-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    color: var(--fg-dim);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.era-hero-meta span { position: relative; }
.era-hero-meta span:not(:last-child)::after {
    content: "·";
    position: absolute;
    right: -12px;
    color: var(--fg-faint);
}

/* ============ SECTIONS ============ */
.era-section {
    padding: 60px 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.era-section-kicker {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--fg-faint);
    margin-bottom: 14px;
}

.era-section-title {
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: clamp(32px, 8vw, 56px);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
}

.era-about {
    font-size: clamp(17px, 4vw, 22px);
    font-weight: 300;
    line-height: 1.6;
    color: rgba(255,255,255,0.85);
    max-width: 720px;
}

/* narrativa larga (historia de la era) */
.era-story {
    font-size: clamp(15px, 3.6vw, 17px);
    font-weight: 300;
    line-height: 1.75;
    color: rgba(255,255,255,0.80);
    max-width: 720px;
}
.era-story + .era-story { margin-top: 1.15em; }
.era-story strong { font-weight: 600; color: var(--fg); }
.era-story a {
    color: var(--fg);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--fg-faint);
    transition: text-decoration-color 0.25s var(--ease), color 0.25s var(--ease);
}
.era-story a:hover {
    color: var(--fg);
    text-decoration-color: var(--fg);
}

/* etiqueta para tracklists múltiples dentro de una misma era */
.tracklist-label {
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: clamp(20px, 5vw, 28px);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}
.tracklist-note {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--fg-faint);
    margin-bottom: 18px;
}
.tracklist + .tracklist-label { margin-top: 48px; }

/* ============ TRACKLIST ============ */
.tracklist {
    list-style: none;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.tracklist li {
    display: grid;
    grid-template-columns: 32px 1fr auto;
    align-items: center;
    gap: 16px;
    padding: 18px 4px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transition: background 0.3s var(--ease), padding 0.3s var(--ease);
    cursor: pointer;
}

.tracklist li:hover {
    background: rgba(255,255,255,0.03);
    padding-left: 12px;
}

.track-num {
    font-family: 'Bricolage Grotesque', sans-serif;
    color: var(--fg-faint);
    font-size: 13px;
    font-weight: 500;
}

.track-title {
    font-size: clamp(15px, 4vw, 17px);
    font-weight: 500;
    letter-spacing: -0.01em;
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.track-name {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.track-feat {
    font-size: 12px;
    font-weight: 400;
    color: var(--fg-faint);
    letter-spacing: 0.02em;
}

.track-explicit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    font-size: 9px;
    font-weight: 700;
    background: rgba(255,255,255,0.12);
    color: var(--fg-dim);
    border-radius: 3px;
    letter-spacing: 0;
    line-height: 1;
}

.track-time {
    color: var(--fg-faint);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
    align-self: center;
}

/* ============ GALLERY ============ */
.gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.gallery-item {
    aspect-ratio: 3 / 4;
    border-radius: 14px;
    background-color: var(--bg-2);
    background-size: cover;
    background-position: center;
    perspective: 1000px;
    cursor: pointer;
    transition: transform 0.6s var(--ease);
}

.gallery-item:hover { transform: scale(1.02); }

/* ---- Flip de créditos ---- */
.flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 14px;
    transform-style: preserve-3d;
    transition: transform 0.6s var(--ease);
}

.gallery-item.flipped .flip-inner { transform: rotateY(180deg); }

.flip-front,
.flip-back {
    position: absolute;
    inset: 0;
    border-radius: 14px;
    overflow: hidden;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.flip-front {
    background-size: cover;
    background-position: center;
    background-color: var(--bg-2);
}

.flip-back {
    transform: rotateY(180deg);
    background-color: var(--bg-2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 18px;
    text-align: center;
}

.flip-back-label {
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-2, rgba(255,255,255,0.5));
}

.flip-back-handle {
    font-weight: 600;
    color: var(--text-1, #fff);
    text-decoration: none;
    border-bottom: 1px solid currentColor;
    word-break: break-word;
}

.flip-back-handle:hover { opacity: 0.7; }

.flip-back-empty {
    font-size: 0.8rem;
    color: var(--text-2, rgba(255,255,255,0.35));
    font-style: italic;
}

@media (min-width: 720px) {
    .gallery {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
    }
}

@media (min-width: 1000px) {
    .era-section {
        padding: 100px 48px;
    }
    .gallery {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============ CTA NEXT ============ */
.era-next {
    padding: 80px 24px 120px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.era-next-kicker {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--fg-faint);
    margin-bottom: 14px;
}

.era-next-link {
    display: inline-flex;
    align-items: baseline;
    gap: 14px;
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: clamp(32px, 8vw, 64px);
    line-height: 1;
    letter-spacing: -0.03em;
    transition: opacity 0.3s var(--ease);
}

.era-next-link:hover { opacity: 0.65; }

.era-next-link .arrow {
    font-size: 0.6em;
    transition: transform 0.4s var(--ease);
}

.era-next-link:hover .arrow {
    transform: translateX(8px);
}

.era-back-home {
    display: inline-block;
    margin-top: 32px;
    padding: 12px 22px;
    border-radius: 999px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--fg-dim);
    transition: all 0.3s var(--ease);
}

.era-back-home:hover {
    background: rgba(255,255,255,0.12);
    color: var(--fg);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============ CTA a experiencias del ecosistema ============ */
.era-cta {
    --cta: #011EF6;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-top: 30px;
    padding: 15px 26px;
    border-radius: 999px;
    background: var(--cta);
    color: #fff;
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: clamp(14px, 3.6vw, 17px);
    letter-spacing: -0.01em;
    box-shadow: 0 14px 34px -10px var(--cta);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), filter 0.3s var(--ease);
}

.era-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 22px 46px -10px var(--cta);
    filter: brightness(1.08);
}

.era-cta .era-cta-arrow {
    font-size: 1.05em;
    transition: transform 0.35s var(--ease);
}

.era-cta:hover .era-cta-arrow { transform: translateX(6px); }

.era-cta--flaco   { --cta: #011EF6; }
.era-cta--atp     { --cta: #FF6700; }
.era-cta--tickets { --cta: #E11D2A; }

/* ============ menú "Escuchar a NSQK" en la nav (páginas con era.css) ============ */
.topbar-music-wrap { position: relative; display: inline-flex; }
.topbar-music { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.topbar-music-caret { transition: transform 0.25s var(--ease); }
.topbar-music-wrap.open .topbar-music-caret { transform: rotate(180deg); }
.topbar-music-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    min-width: 210px;
    padding: 8px;
    border-radius: 16px;
    background: rgba(16, 16, 16, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
    box-shadow: 0 20px 44px -16px rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    gap: 2px;
    opacity: 0;
    transform: translateX(-50%) translateY(-8px);
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
    z-index: 1200;
}
.topbar-music-wrap.open .topbar-music-menu {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}
.topbar-music-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: 11px;
    color: var(--fg);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.2s var(--ease);
}
.topbar-music-menu a:hover { background: rgba(255, 255, 255, 0.08); }
.topbar-music-menu svg { width: 18px; height: 18px; flex-shrink: 0; }
.topbar-mobile-music { display: flex; flex-direction: column; }
.topbar-mobile-music-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    cursor: pointer;
}
.topbar-mobile-music-toggle .topbar-music-caret { transition: transform 0.25s var(--ease); }
.topbar-mobile-music.open .topbar-mobile-music-toggle .topbar-music-caret { transform: rotate(180deg); }
.topbar-mobile-music-list {
    display: flex;
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    padding-left: 12px;
    transition: max-height 0.35s var(--ease);
}
.topbar-mobile-music.open .topbar-mobile-music-list { max-height: 420px; }

/* ============ sección "Escucha y sigue a NSQK" ============ */
.listen {
    max-width: 980px;
    margin: 0 auto;
    padding: 72px 24px;
    text-align: center;
}
.listen-title {
    font-family: 'Bricolage Grotesque', sans-serif;
    font-size: clamp(28px, 5vw, 44px);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 10px;
}
.listen-text {
    color: var(--fg-dim);
    font-size: 15px;
    margin: 0 auto 28px;
    max-width: 460px;
}
.listen-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}
.listen-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--fg);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.listen-btn:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.22);
    transform: translateY(-2px);
}
.listen-btn svg { width: 20px; height: 20px; flex-shrink: 0; }

/* En teléfono, los pills de distinto ancho quedan disparejos al envolverse;
   los mostramos en una cuadrícula uniforme de 2 columnas. */
@media (max-width: 600px) {
    .listen-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .listen-btn {
        justify-content: center;
        padding: 14px 12px;
    }
    /* si el total es impar, el último ocupa toda la fila (queda centrado) */
    .listen-btn:last-child:nth-child(odd) { grid-column: 1 / -1; }
}