/* =============================================
   ESTILOS ESPECÍFICOS PARA LA PÁGINA DEL LIBRO
   ============================================= */

/* HERO DEL LIBRO */
#libro-hero {
  padding: 120px clamp(1.5rem, 8vw, 8rem) 80px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}

.libro-hero-inner {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.libro-portada {
  position: relative;
  display: flex;
  justify-content: center;
}

.portada-img {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 8px 16px 16px 8px;
  box-shadow: 0 25px 45px -12px rgba(0,0,0,0.6), -8px 0 20px rgba(0,0,0,0.4);
  transition: transform 0.3s var(--ease-out);
}

.portada-img:hover {
  transform: scale(1.02);
}

.isbn-badge {
  position: absolute;
  bottom: -12px;
  right: 20px;
  background: var(--accent);
  color: #0d1117;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 40px;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.libro-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.libro-badge {
  display: inline-block;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(88, 166, 255, 0.12);
  padding: 0.25rem 0.8rem;
  border-radius: 40px;
  border: 1px solid rgba(88, 166, 255, 0.25);
}

.libro-titulo {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

.libro-subtitulo {
  font-size: 1.2rem;
  color: var(--txt-muted);
  font-weight: 300;
  margin-top: -0.2rem;
}

.libro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0.5rem 0;
}

.meta-item {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--txt-muted);
  background: var(--bg-card);
  padding: 0.2rem 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.libro-descripcion-corta {
  margin: 0.5rem 0;
}

.libro-descripcion-corta p {
  color: var(--txt-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* BOTONES PRINCIPALES */
.libro-acciones {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
  margin: 1.5rem 0;
}

.btn-gratis {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 2.2rem;
  background: var(--accent);
  color: #0d1117;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 12px;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
}

.btn-gratis:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(88, 166, 255, 0.35);
  background: #4790e8;
}

.btn-apoyar-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.apoyar-label {
  font-size: 0.8rem;
  color: var(--txt-dim);
  font-family: var(--font-body);
  font-weight: 500;
}

.apoyar-botones {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.btn-donacion-img {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem;
  background: #ededed;
  border-radius: 12px;
  border: 2px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  min-height: 50px;
  min-width: 160px;
}

.btn-donacion-img-ko-fi {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem;
  background: #202020;
  border-radius: 12px;
  border: 2px solid #30363d;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  min-height: 50px;
  min-width: 160px;
}

.btn-donacion-img:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  border-color: var(--accent);
}

.btn-donacion-img img {
  max-height: 45px;
  width: auto;
  display: block;
}

/* SECCIÓN DESCRIPCIÓN DOS COLUMNAS */
#libro-descripcion {
  padding: 5rem clamp(1.5rem, 8vw, 8rem);
  background: var(--bg);
}

.container-dos-columnas {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.feature-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  font-size: 0.95rem;
  color: var(--txt-muted);
  line-height: 1.6;
}

.feature-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feature-item strong {
  color: var(--txt);
}

.prefacio-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border);
  position: relative;
}

.prefacio-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.prefacio-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 1.2rem;
}

.prefacio-card p {
  color: var(--txt-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  font-style: italic;
}

.prefacio-autor {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--txt);
}

.prefacio-autor span {
  font-weight: 400;
  color: var(--txt-muted);
  font-size: 0.75rem;
}

/* ÍNDICE */
#libro-indice {
  padding: 5rem clamp(1.5rem, 8vw, 8rem);
  background: var(--bg-2);
}

.indice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  max-width: 1400px;
  margin: 2rem auto 0;
}

.capitulo-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}

.capitulo-card:hover {
  border-color: var(--border-glow);
  transform: translateX(4px);
}

.cap-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  min-width: 45px;
}

.cap-titulo {
  font-size: 0.9rem;
  color: var(--txt-muted);
  line-height: 1.4;
}

/* METODOLOGÍA */
#libro-metodologia {
  padding: 5rem clamp(1.5rem, 8vw, 8rem);
  background: var(--bg);
}

.metodologia-inner {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.metodologia-flujo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.flujo-paso {
  background: var(--bg-card);
  padding: 0.5rem 1rem;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
}

.flujo-flecha {
  color: var(--txt-dim);
  font-size: 1.2rem;
}

.metodologia-cita {
  display: flex;
  align-items: center;
}

.cita-card {
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.05), transparent);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--accent);
}

.cita-card p {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--txt);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.cita-autor {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

/* TESTIMONIOS */
#libro-testimonios {
  padding: 5rem clamp(1.5rem, 8vw, 8rem);
  background: var(--bg-2);
}

.testimonios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1400px;
  margin: 2rem auto 0;
}

.testimonio-card {
  background: var(--bg-card);
  padding: 1.8rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform 0.2s;
}

.testimonio-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
}

.testimonio-texto {
  font-size: 0.95rem;
  color: var(--txt-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
  font-style: italic;
}

.testimonio-autor {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--txt);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.testimonio-autor span {
  font-weight: 400;
  color: var(--txt-muted);
  font-size: 0.7rem;
}

.testimonios-nota {
  text-align: center;
  font-size: 0.75rem;
  color: var(--txt-dim);
  margin-top: 2rem;
}

/* CTA FINAL */
#libro-cta-final {
  padding: 4rem clamp(1.5rem, 8vw, 8rem);
  background: var(--bg);
  text-align: center;
}

.cta-final-inner {
  max-width: 700px;
  margin: 0 auto;
}

.cta-final-inner h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 2rem;
}

.cta-final-botones {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.btn-gratis-grande {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 2rem;
  background: var(--accent);
  color: #0d1117;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 10px;
  transition: transform 0.2s;
}

.btn-gratis-grande:hover {
  transform: translateY(-2px);
}

.cta-nota {
  font-size: 0.75rem;
  color: var(--txt-muted);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .libro-hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  .libro-portada {
    order: -1;
  }
  
  .portada-img {
    max-width: 240px;
  }
  
  .isbn-badge {
    right: auto;
    left: 50%;
    transform: translateX(-50%);
    bottom: -12px;
  }
  
  .libro-acciones {
    justify-content: center;
  }
  
  .container-dos-columnas {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .metodologia-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .metodologia-flujo {
    justify-content: center;
  }
  
  .indice-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .btn-gratis, .btn-gratis-grande {
    width: 100%;
    justify-content: center;
  }
  
  .apoyar-botones {
    width: 100%;
    justify-content: center;
  }
  
  .libro-titulo {
    font-size: 1.8rem;
  }
}