/* ══════════════════════════════════════════════════════
   styles.css — Pasión por la Rítmica · Colección de libros
   Identidad propia dentro del ecosistema, coherente con
   Ritmipedia y el Directorio de Clubs.
   Paleta: Rosa #e8748a · Dorado #f6c768 · Ciruela #5c3b5e
══════════════════════════════════════════════════════ */

:root {
  --lb-rose:      #e8748a;
  --lb-rose-dk:   #c85a70;
  --lb-rose-lt:   #fcebee;
  --lb-gold:      #f6c768;
  --lb-gold-dk:   #d6a23e;
  --lb-gold-lt:   #fdf6e6;
  --lb-plum:      #5c3b5e;

  --lb-bg:        #fffaf6;
  --lb-bg-alt:    #fbf2ee;
  --lb-bg-card:   #ffffff;
  --lb-bg-hover:  #fbeef0;
  --lb-border:    #f1ddd9;
  --lb-border-dk: #e6c9c2;

  --lb-text:        #382831;
  --lb-text-muted:  #6e5660;
  --lb-text-label:  #a98c95;

  --lb-header-h: 64px;
  --lb-radius:    14px;
  --lb-radius-sm: 9px;
  --lb-radius-lg: 20px;

  --lb-sh-sm: 0 1px 4px rgba(232,116,138,.10);
  --lb-sh-md: 0 6px 20px rgba(232,116,138,.16);
  --lb-sh-lg: 0 16px 48px rgba(92,59,94,.20);
}

.dark {
  --lb-bg:        #221823;
  --lb-bg-alt:    #2b1f2c;
  --lb-bg-card:   #2f2230;
  --lb-bg-hover:  #3a2b3b;
  --lb-border:    #4a3849;
  --lb-border-dk: #5c4659;
  --lb-text:        #f6ecef;
  --lb-text-muted:  #cdb3bd;
  --lb-text-label:  #9a7f8c;
  --lb-rose-lt:   rgba(232,116,138,.14);
  --lb-gold-lt:   rgba(246,199,104,.14);
}

/* ── Reset / base ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
body {
  background-color: var(--lb-bg);
  color: var(--lb-text);
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  line-height: 1.6;
  transition: background-color .2s, color .2s;
}
.lb-container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
@media (min-width: 768px) { .lb-container { padding: 0 2rem; } }

/* ── HEADER ───────────────────────────────────────── */
.lb-header {
  position: sticky; top: 0; z-index: 200;
  height: var(--lb-header-h);
  background: var(--lb-bg-card);
  border-bottom: 1px solid var(--lb-border);
  backdrop-filter: blur(12px);
}
.lb-header-inner {
  max-width: 1200px; margin: 0 auto; height: 100%;
  padding: 0 1.25rem; display: flex; align-items: center; gap: 1rem;
}
@media (min-width: 768px) { .lb-header-inner { padding: 0 2rem; } }

.lb-logo { display: flex; align-items: center; gap: .6rem; text-decoration: none; flex-shrink: 0; }
.lb-logo-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--lb-rose);
  display: flex; align-items: center; justify-content: center;
  color: white; flex-shrink: 0;
}
.lb-logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.lb-logo-name { font-family: 'Fraunces', serif; font-size: 1.05rem; font-weight: 700; color: var(--lb-text); }
.lb-logo-tagline { font-size: .68rem; color: var(--lb-text-label); }

.lb-header-actions { display: flex; align-items: center; gap: .4rem; margin-left: auto; }
.lb-icon-btn {
  width: 36px; height: 36px; border-radius: 8px; border: none; background: transparent;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--lb-text-muted); transition: background .15s, color .15s;
}
.lb-icon-btn:hover { background: var(--lb-bg-hover); color: var(--lb-rose); }

/* Idioma */
.lb-lang-link {
  display: none; align-items: center; gap: .3rem;
  border: 1px solid var(--lb-border); border-radius: 8px;
  padding: .35rem .7rem; font-size: .76rem; font-weight: 600;
  color: var(--lb-text-muted); text-decoration: none;
  transition: background .15s, color .15s;
}
@media (min-width: 640px) { .lb-lang-link { display: flex; } }
.lb-lang-link:hover { background: var(--lb-bg-hover); color: var(--lb-rose); }

/* Ecosistema dropdown */
.lb-eco-wrap { position: relative; }
.lb-eco-btn {
  display: none; align-items: center; gap: .3rem;
  background: none; border: 1px solid var(--lb-border); border-radius: 8px;
  padding: .35rem .7rem; font-size: .76rem; font-weight: 600;
  color: var(--lb-text-muted); cursor: pointer; white-space: nowrap;
  transition: background .15s, color .15s;
}
@media (min-width: 768px) { .lb-eco-btn { display: flex; } }
.lb-eco-btn:hover { background: var(--lb-bg-hover); color: var(--lb-rose); }
.lb-eco-dropdown {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: var(--lb-bg-card); border: 1px solid var(--lb-border);
  border-radius: var(--lb-radius); min-width: 210px;
  box-shadow: var(--lb-sh-lg); overflow: hidden; z-index: 300;
}
.lb-eco-dropdown a, .lb-eco-current {
  display: block; padding: .6rem 1rem; font-size: .82rem;
  color: var(--lb-text-muted); text-decoration: none;
  transition: background .12s, color .12s;
}
.lb-eco-dropdown a:hover { background: var(--lb-bg-hover); color: var(--lb-rose); }
.lb-eco-current { color: var(--lb-rose); font-weight: 600; background: var(--lb-rose-lt); }

/* Mobile menu */
.lb-mobile-menu {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,.5); backdrop-filter: blur(3px); display: none;
}
.lb-mobile-menu.open { display: block; }
.lb-mobile-menu-inner {
  position: absolute; left: 0; top: 0; bottom: 0; width: min(300px, 85vw);
  background: var(--lb-bg-card); border-right: 1px solid var(--lb-border);
  display: flex; flex-direction: column; overflow-y: auto;
  animation: lb-slide-in .22s ease;
}
@keyframes lb-slide-in { from { transform: translateX(-100%); } to { transform: translateX(0); } }
.lb-mobile-menu-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.1rem; border-bottom: 1px solid var(--lb-border);
}
.lb-mobile-nav { flex: 1; padding: .6rem; display: flex; flex-direction: column; gap: .1rem; }
.lb-mobile-nav a {
  display: flex; align-items: center; gap: .6rem; padding: .6rem .8rem; border-radius: 8px;
  font-size: .85rem; color: var(--lb-text-muted); text-decoration: none;
  transition: background .12s, color .12s;
}
.lb-mobile-nav a:hover { background: var(--lb-bg-hover); color: var(--lb-rose); }
.lb-mobile-nav-section {
  padding: .6rem .8rem .2rem; font-size: .68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em; color: var(--lb-text-label);
}
.lb-mobile-menu-footer { padding: 1rem 1.1rem; border-top: 1px solid var(--lb-border); }

/* ── HERO ─────────────────────────────────────────── */
.lb-hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--lb-rose-lt) 0%, var(--lb-bg) 60%);
  padding: 3.5rem 0 5rem; border-bottom: 1px solid var(--lb-border);
}
.lb-hero-inner {
  max-width: 720px; margin: 0 auto; padding: 0 1.25rem; text-align: center; position: relative; z-index: 1;
}
.lb-eyebrow {
  font-family: 'JetBrains Mono', monospace; font-size: .7rem; letter-spacing: .2em;
  text-transform: uppercase; color: var(--lb-rose-dk); display: inline-block; margin-bottom: 1rem;
}
.dark .lb-eyebrow { color: var(--lb-rose); }
.lb-hero-title {
  font-family: 'Fraunces', serif; font-weight: 300;
  font-size: clamp(2.1rem, 5.5vw, 3.4rem); line-height: 1.15; color: var(--lb-text); margin-bottom: 1.1rem;
}
.lb-hero-title em {
  font-style: italic; font-weight: 500;
  background: linear-gradient(95deg, var(--lb-rose) 0%, var(--lb-gold) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lb-hero-subtitle { font-size: .98rem; color: var(--lb-text-muted); line-height: 1.7; margin-bottom: 2rem; }
.lb-hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; }

/* Cinta decorativa (firma visual del ecosistema) */
.lb-ribbon { position: absolute; left: 0; right: 0; bottom: -50px; width: 100%; pointer-events: none; }
.lb-ribbon path { fill: none; stroke-width: 2.5; stroke-linecap: round; }
@media (prefers-reduced-motion: no-preference) {
  .lb-ribbon .lb-ribbon-shimmer { stroke-dasharray: 6 14; animation: lb-ribbon-flow 16s linear infinite; }
  @keyframes lb-ribbon-flow { to { stroke-dashoffset: -400; } }
}

/* ── SECTIONS ─────────────────────────────────────── */
.lb-section { padding: 3.5rem 0; }
.lb-section-alt { background: var(--lb-bg-alt); }
.lb-section-header { text-align: center; max-width: 640px; margin: 0 auto 2.25rem; }
.lb-section-title { font-family: 'Fraunces', serif; font-size: 1.6rem; font-weight: 700; color: var(--lb-text); margin-bottom: .5rem; }
.lb-section-subtitle { font-size: .88rem; color: var(--lb-text-label); line-height: 1.6; }

/* ── DESTACADO (Nuevo libro) ──────────────────────── */
.lb-destacado {
  display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: center;
  background: var(--lb-bg-card); border: 1px solid var(--lb-border);
  border-radius: var(--lb-radius-lg); padding: 2rem; box-shadow: var(--lb-sh-md);
}
@media (min-width: 768px) { .lb-destacado { grid-template-columns: 200px 1fr; padding: 2.5rem; } }
.lb-destacado-cover {
  width: 100%; max-width: 200px; margin: 0 auto; border-radius: 10px;
  box-shadow: 0 18px 40px -16px rgba(92,59,94,.35); transform: rotate(-2deg);
  transition: transform .3s;
}
.lb-destacado:hover .lb-destacado-cover { transform: rotate(0deg) translateY(-4px); }
.lb-destacado-label {
  font-family: 'JetBrains Mono', monospace; font-size: .68rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--lb-rose-dk); margin-bottom: .6rem; display: block;
}
.dark .lb-destacado-label { color: var(--lb-rose); }
.lb-destacado-title { font-family: 'Fraunces', serif; font-size: 1.6rem; font-weight: 700; color: var(--lb-text); margin-bottom: .65rem; }
.lb-destacado-text { font-size: .9rem; color: var(--lb-text-muted); line-height: 1.7; margin-bottom: 1.25rem; }

/* ── SOBRE LA COLECCIÓN ───────────────────────────── */
.lb-about { max-width: 680px; margin: 0 auto; }
.lb-about p { font-size: .92rem; color: var(--lb-text-muted); line-height: 1.85; margin-bottom: 1.1rem; }
.lb-about p:first-of-type {
  font-family: 'Fraunces', serif; font-size: 1.15rem; color: var(--lb-text); font-style: italic; line-height: 1.6;
}

/* ── TABS Libros / Libretas ───────────────────────── */
.lb-tabs {
  display: inline-flex; gap: .25rem; background: var(--lb-bg-alt);
  border: 1px solid var(--lb-border); border-radius: 50px; padding: .3rem;
  margin: 0 auto 2.25rem; display: flex; justify-content: center; width: fit-content;
}
.lb-tab {
  border: none; background: transparent; border-radius: 50px;
  padding: .5rem 1.25rem; font-size: .85rem; font-weight: 700;
  color: var(--lb-text-muted); cursor: pointer; transition: background .15s, color .15s;
  display: flex; align-items: center; gap: .4rem;
}
.lb-tab.active { background: var(--lb-rose); color: white; }
.lb-tab-panel { display: none; }
.lb-tab-panel.active { display: block; }

/* ── GRID de libros / libretas ───────────────────── */
.lb-books-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1.5rem;
}
.lb-book-card {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  text-decoration: none; padding: 1.25rem 1rem; border-radius: var(--lb-radius);
  background: var(--lb-bg-card); border: 1px solid var(--lb-border);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.lb-book-card:hover { transform: translateY(-5px); box-shadow: var(--lb-sh-md); border-color: var(--lb-rose); }
.lb-book-cover {
  width: 100%; max-width: 140px; border-radius: 6px; margin-bottom: 1rem;
  box-shadow: 0 10px 24px -10px rgba(92,59,94,.35); transition: transform .25s;
}
.lb-book-card:hover .lb-book-cover { transform: scale(1.04); }
.lb-book-title { font-family: 'Fraunces', serif; font-size: .92rem; font-weight: 600; color: var(--lb-text); margin-bottom: .5rem; line-height: 1.35; }
.lb-book-link {
  font-size: .74rem; font-weight: 700; color: var(--lb-rose);
  display: inline-flex; align-items: center; gap: .25rem; margin-top: auto;
}
.lb-book-card:hover .lb-book-link svg { transform: translateX(3px); }
.lb-book-link svg { transition: transform .2s; }

/* Placeholder cuando una portada no carga */
.lb-cover-fallback {
  width: 100%; max-width: 140px; aspect-ratio: 3/4; border-radius: 6px; margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--lb-rose-lt), var(--lb-gold-lt));
  display: flex; align-items: center; justify-content: center; color: var(--lb-rose);
  font-size: 2.5rem;
}

/* ── NEWSLETTER ───────────────────────────────────── */
.lb-newsletter {
  background: linear-gradient(135deg, var(--lb-plum) 0%, #3e2640 100%);
  border-radius: var(--lb-radius-lg); padding: 2.5rem; text-align: center;
  max-width: 640px; margin: 0 auto; color: #fdf6f0;
}
.lb-newsletter-title { font-family: 'Fraunces', serif; font-size: 1.4rem; font-weight: 700; margin-bottom: .5rem; }
.lb-newsletter-text { font-size: .88rem; color: #e3cdd6; margin-bottom: 1.5rem; line-height: 1.6; }
.lb-newsletter-form { display: flex; flex-direction: column; gap: .7rem; max-width: 380px; margin: 0 auto; }
@media (min-width: 480px) { .lb-newsletter-form { flex-direction: row; } }
.lb-newsletter-form input {
  flex: 1; padding: .65rem .9rem; border-radius: 50px; border: none;
  background: rgba(255,255,255,.12); color: white; font-size: .85rem; outline: none;
  border: 1.5px solid rgba(255,255,255,.18);
}
.lb-newsletter-form input::placeholder { color: #cbb5c0; }
.lb-newsletter-form input:focus { border-color: var(--lb-gold); }
.lb-newsletter-form button {
  background: var(--lb-gold); color: #3e2640; border: none; border-radius: 50px;
  padding: .65rem 1.5rem; font-size: .85rem; font-weight: 700; cursor: pointer;
  transition: opacity .15s; white-space: nowrap;
}
.lb-newsletter-form button:hover { opacity: .88; }
.lb-newsletter-privacy { font-size: .72rem; color: #cbb5c0; margin-top: 1rem; }

/* ── BUTTONS ──────────────────────────────────────── */
.lb-btn-primary {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--lb-rose); color: white; text-decoration: none;
  border: none; border-radius: 50px; padding: .6rem 1.4rem;
  font-size: .85rem; font-weight: 700; cursor: pointer; transition: background .15s, transform .15s;
}
.lb-btn-primary:hover { background: var(--lb-rose-dk); transform: translateY(-1px); }
.lb-btn-outline {
  display: inline-flex; align-items: center; gap: .4rem;
  background: transparent; color: var(--lb-text-muted);
  border: 1.5px solid var(--lb-border); border-radius: 50px;
  padding: .55rem 1.3rem; font-size: .85rem; font-weight: 600;
  cursor: pointer; text-decoration: none; transition: background .15s, color .15s, border-color .15s;
}
.lb-btn-outline:hover { background: var(--lb-bg-hover); color: var(--lb-rose); border-color: var(--lb-rose); }

/* ── FOOTER ───────────────────────────────────────── */
.lb-footer { background: var(--lb-bg-alt); border-top: 1px solid var(--lb-border); padding: 2.5rem 0 1.5rem; }
.lb-footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 2rem; }
@media (min-width: 640px) { .lb-footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.lb-footer-brand { max-width: 280px; }
.lb-footer-logo { display: flex; align-items: center; gap: .5rem; margin-bottom: .6rem; }
.lb-footer-logo-name { font-family: 'Fraunces', serif; font-size: .95rem; font-weight: 700; color: var(--lb-text); }
.lb-footer-tagline { font-size: .78rem; color: var(--lb-text-muted); line-height: 1.5; }
.lb-footer-links { display: flex; flex-direction: column; gap: .35rem; }
.lb-footer-links h4 {
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--lb-text-label); margin-bottom: .25rem;
}
.lb-footer-links a { font-size: .82rem; color: var(--lb-text-muted); text-decoration: none; transition: color .15s; }
.lb-footer-links a:hover { color: var(--lb-rose); }
.lb-footer-bottom {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
  padding-top: 1.25rem; border-top: 1px solid var(--lb-border); font-size: .75rem; color: var(--lb-text-label);
}

/* ── TOAST ────────────────────────────────────────── */
#toast-container { position: fixed; bottom: 1.5rem; right: 1rem; z-index: 9999; display: flex; flex-direction: column; gap: .4rem; pointer-events: none; }
.toast {
  display: flex; align-items: center; gap: .5rem; padding: .55rem .9rem; border-radius: 10px;
  font-size: .82rem; font-weight: 500; max-width: 300px; opacity: 0; transform: translateX(16px);
  transition: opacity .25s, transform .25s; box-shadow: var(--lb-sh-md); pointer-events: auto;
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast-success { background: #e8f5e0; border: 1.5px solid #8bc06a; color: #2a5a10; }
.toast-error   { background: #fff0f0; border: 1.5px solid #f0b0b0; color: #c0392b; }
.toast-info    { background: var(--lb-rose-lt); border: 1.5px solid rgba(232,116,138,.4); color: var(--lb-rose-dk); }
.dark .toast-success { background: #1a3010; border-color: #4a7a30; color: #8adf5a; }
.dark .toast-error   { background: #3a0d12; border-color: #7a2020; color: #f0a0a0; }

/* ── SCROLL TO TOP ────────────────────────────────── */
.lb-scroll-top {
  position: fixed; bottom: 1.5rem; left: 1rem; z-index: 800;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--lb-rose); color: white; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; box-shadow: var(--lb-sh-md);
  opacity: 0; transform: translateY(8px); transition: opacity .25s, transform .25s; pointer-events: none;
}
.lb-scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.lb-scroll-top:hover { background: var(--lb-rose-dk); }