/* Indefinit AI — Servicio Editorial — libros.indefinitai.com */

:root {
  --verde: #5BD85A;
  --verde-oscuro: #2F9E3E;
  --tinta: #191B18;
  --papel: #FAF7F1;
  --crema: #F0EAE0;
  --bronce: #B08D4F;
  --piedra: #5C5A54;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --container: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--papel);
  color: var(--tinta);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--verde-oscuro);
  margin-bottom: 16px;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 14px;
}

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Scroll progress bar ---------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--verde), var(--bronce));
  z-index: 300;
  transition: width 0.1s linear;
}

/* ---------- Hero cursor spotlight ---------- */

.hero-spotlight {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: radial-gradient(320px circle at var(--x, 50%) var(--y, 30%), rgba(91, 216, 90, 0.16), transparent 70%);
}

.hero:hover .hero-spotlight {
  opacity: 1;
}

.hero-grid {
  position: relative;
  z-index: 2;
}

@media (hover: none) {
  .hero-spotlight { display: none; }
}

.section-lede {
  font-size: 18px;
  color: var(--piedra);
  max-width: 640px;
  margin-bottom: 48px;
}

section { padding: 88px 0; }

@media (max-width: 640px) {
  section { padding: 64px 0; }
}

/* ---------- Buttons ---------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  padding: 16px 30px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  transition: left 0.65s ease;
  pointer-events: none;
}

.btn:hover::after {
  left: 130%;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: var(--verde);
  color: var(--tinta);
  box-shadow: 0 6px 20px rgba(91, 216, 90, 0.35);
}

.btn-primary:hover {
  background: var(--verde-oscuro);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(91, 216, 90, 0.45);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.96);
}

.btn-ghost {
  background: transparent;
  color: var(--papel);
  border: 1.5px solid rgba(250, 247, 241, 0.4);
}

.btn-ghost:hover {
  border-color: var(--verde);
  color: var(--verde);
  transform: translateY(-3px);
}

/* ---------- Nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 247, 241, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(25, 27, 24, 0.08);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
}

.nav-brand img { width: 34px; height: 34px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
  font-weight: 500;
}

.nav-links a:hover { color: var(--verde-oscuro); }

.nav .btn-primary { padding: 11px 22px; font-size: 14px; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-links { display: none; }

  .nav-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 22px;
    line-height: 1;
    color: var(--tinta);
    cursor: pointer;
    padding: 6px;
  }

  .nav.is-open .nav-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--papel);
    padding: 12px 24px 20px;
    border-bottom: 1px solid rgba(25, 27, 24, 0.1);
    box-shadow: 0 16px 24px -12px rgba(25, 27, 24, 0.15);
  }

  .nav.is-open .nav-links a {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid rgba(25, 27, 24, 0.06);
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: var(--tinta);
  color: var(--papel);
  padding: 100px 0 90px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 700px 500px at 15% 0%, rgba(91, 216, 90, 0.16), transparent 60%),
    radial-gradient(ellipse 500px 400px at 100% 100%, rgba(176, 141, 79, 0.14), transparent 60%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-cover { order: -1; }
}

.hero-slogan {
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--verde);
  margin-bottom: 18px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5.4vw, 58px);
  margin-bottom: 22px;
}

.hero h1 em {
  font-style: italic;
  color: var(--verde);
}

.hero p.lede {
  font-size: 19px;
  color: rgba(250, 247, 241, 0.78);
  max-width: 520px;
  margin-bottom: 34px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-bottom: 14px;
}

.hero-note {
  font-size: 14px;
  color: rgba(250, 247, 241, 0.55);
}

.hero-cover {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  object-fit: cover;
  background: #000;
  box-shadow: 0 30px 60px -18px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.hero-video-placeholder p {
  font-size: 14px;
  font-weight: 500;
}

/* ---------- Cifras ---------- */

.stats {
  padding: 56px 0;
  background: var(--crema);
  border-bottom: 1px solid rgba(25, 27, 24, 0.08);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

@media (max-width: 760px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
}

.stat-number {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 44px);
  color: var(--verde-oscuro);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 13.5px;
  color: var(--piedra);
  max-width: 160px;
  margin: 0 auto;
}

/* ---------- Puntos de partida ---------- */

.origen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 800px) {
  .origen-grid { grid-template-columns: 1fr; }
}

.origen-card {
  background: #fff;
  border: 1px solid rgba(25, 27, 24, 0.08);
  border-radius: 16px;
  padding: 32px 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.origen-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -18px rgba(25, 27, 24, 0.2);
}

.origen-card:hover .origen-icon {
  transform: scale(1.12) rotate(-4deg);
}

.origen-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--crema);
  color: var(--verde-oscuro);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.origen-card h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.origen-card p {
  color: var(--piedra);
  font-size: 15px;
}

/* ---------- Proceso ---------- */

.proceso {
  background: var(--crema);
}

.proceso-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.proceso-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid rgba(25, 27, 24, 0.1);
}

.proceso-item:last-child { border-bottom: 1px solid rgba(25, 27, 24, 0.1); }

.proceso-num {
  font-family: var(--serif);
  font-size: 30px;
  color: var(--bronce);
}

.proceso-item h3 {
  font-size: 19px;
  margin-bottom: 6px;
}

.proceso-item p {
  color: var(--piedra);
  font-size: 15px;
  max-width: 620px;
}

/* ---------- Todo incluido ---------- */

.incluido-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 32px;
}

@media (max-width: 640px) {
  .incluido-grid { grid-template-columns: 1fr; }
}

.incluido-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 16px;
}

.check {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--verde);
  color: var(--tinta);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  margin-top: 2px;
}

/* ---------- Precios ---------- */

.precios {
  background: var(--tinta);
  color: var(--papel);
}

.precios .eyebrow { color: var(--verde); }
.precios .section-lede { color: rgba(250, 247, 241, 0.72); }

.precios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}

@media (max-width: 860px) {
  .precios-grid { grid-template-columns: 1fr; }
}

.precio-card {
  background: rgba(250, 247, 241, 0.05);
  border: 1px solid rgba(250, 247, 241, 0.14);
  border-radius: 16px;
  padding: 30px 26px;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.precio-card:hover {
  transform: translateY(-6px);
  background: rgba(250, 247, 241, 0.09);
  border-color: rgba(91, 216, 90, 0.4);
}

.precio-card .precio-label {
  font-size: 14px;
  color: rgba(250, 247, 241, 0.6);
  margin-bottom: 10px;
}

.precio-card .precio-valor {
  font-family: var(--serif);
  font-size: 30px;
  color: var(--bronce);
  margin-bottom: 8px;
}

.precio-card p.precio-detalle {
  font-size: 14px;
  color: rgba(250, 247, 241, 0.65);
}

.precios-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid rgba(250, 247, 241, 0.14);
  font-size: 14px;
  color: rgba(250, 247, 241, 0.65);
}

.precios-foot strong { color: var(--papel); }

/* ---------- Fundadora ---------- */

.fundadora-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 56px;
  align-items: center;
}

@media (max-width: 800px) {
  .fundadora-grid { grid-template-columns: 1fr; }
}

.fundadora-photo img {
  border-radius: 16px;
  box-shadow: 0 24px 48px -16px rgba(25, 27, 24, 0.25);
}

.fundadora-text p { margin-bottom: 16px; color: var(--piedra); font-size: 16.5px; }
.fundadora-text p:last-child { margin-bottom: 0; }
.fundadora-text .firma {
  font-family: var(--serif);
  font-style: italic;
  color: var(--tinta);
  font-size: 18px;
  margin-top: 20px;
}

/* ---------- Galería ---------- */

.galeria-carousel {
  position: relative;
  margin: 0 -4px;
  padding: 0 4px;
}

.galeria-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 4px 4px 16px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  cursor: grab;
  user-select: none;
}

.galeria-track::-webkit-scrollbar { display: none; }

.galeria-track.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
  scroll-behavior: auto;
}

.galeria-item {
  flex: 0 0 auto;
  width: 240px;
  scroll-snap-align: start;
  text-align: center;
}

.galeria-item img { pointer-events: none; }

@media (max-width: 760px) {
  .galeria-item { width: 200px; }
}

@media (max-width: 500px) {
  .galeria-item { width: 168px; }
  .galeria-track { gap: 16px; }
}

.carousel-arrow {
  position: absolute;
  top: 38%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--papel);
  border: 1px solid rgba(25, 27, 24, 0.12);
  box-shadow: 0 10px 24px -10px rgba(25, 27, 24, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  line-height: 1;
  color: var(--tinta);
  cursor: pointer;
  z-index: 2;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.carousel-arrow:hover {
  background: var(--verde);
  color: var(--tinta);
  transform: translateY(-50%) scale(1.1);
}

.carousel-arrow:disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.carousel-prev { left: -20px; }
.carousel-next { right: -20px; }

@media (max-width: 900px) {
  .carousel-prev { left: -8px; }
  .carousel-next { right: -8px; }
}

@media (max-width: 640px) {
  .carousel-arrow { display: none; }
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.carousel-dots .dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(25, 27, 24, 0.18);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.carousel-dots .dot:hover { background: rgba(25, 27, 24, 0.35); }

.carousel-dots .dot.active {
  background: var(--verde-oscuro);
  transform: scale(1.35);
}

.galeria-item .cover-wrap {
  background: #fff;
  border-radius: 10px;
  padding: 14px;
  box-shadow: 0 16px 32px -12px rgba(25, 27, 24, 0.18);
  transition: transform 0.2s ease;
  margin-bottom: 12px;
}

.galeria-item:hover .cover-wrap { transform: translateY(-6px) rotate(-1deg); }

.galeria-item .cover-wrap img { border-radius: 3px; }

.galeria-item .cover-title {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--tinta);
  font-weight: 600;
  margin-bottom: 2px;
}

.galeria-item .cover-author {
  font-size: 12.5px;
  color: var(--piedra);
  margin-bottom: 6px;
}

.galeria-item .cover-amazon-link {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--verde-oscuro);
}

.galeria-item .cover-amazon-link:hover { color: var(--bronce); }

/* ---------- Testimonios ---------- */

.testimonios { background: var(--crema); }

.testimonios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 860px) {
  .testimonios-grid { grid-template-columns: 1fr; }
}

.testimonio-card {
  background: var(--papel);
  border-radius: 16px;
  padding: 30px 26px;
  border: 1px solid rgba(25, 27, 24, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.testimonio-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -18px rgba(25, 27, 24, 0.18);
}

.testimonio-quote-mark {
  font-family: var(--serif);
  font-size: 40px;
  color: var(--bronce);
  line-height: 1;
  margin-bottom: 8px;
  display: block;
}

.testimonio-card p.quote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  margin-bottom: 18px;
}

.testimonio-autor {
  font-size: 14px;
  font-weight: 600;
  color: var(--verde-oscuro);
}

.testimonio-badge {
  display: inline-block;
  margin-top: 18px;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--piedra);
  border: 1px solid rgba(25, 27, 24, 0.15);
  border-radius: 999px;
  padding: 4px 10px;
}

/* ---------- FAQ ---------- */

.faq-list {
  max-width: 760px;
}

.faq-item {
  border-bottom: 1px solid rgba(25, 27, 24, 0.12);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary .faq-icon {
  flex: none;
  font-family: var(--sans);
  font-size: 20px;
  color: var(--verde-oscuro);
  transition: transform 0.2s ease;
}

.faq-item[open] summary .faq-icon { transform: rotate(45deg); }

.faq-item p {
  color: var(--piedra);
  font-size: 15.5px;
  padding-bottom: 22px;
  max-width: 640px;
}

/* ---------- Cierre CTA ---------- */

.cierre {
  background: var(--tinta);
  color: var(--papel);
  text-align: center;
  padding: 110px 0;
}

.cierre-slogan {
  font-family: var(--serif);
  font-style: italic;
  color: var(--verde);
  font-size: 16px;
  margin-bottom: 18px;
}

.cierre h2 {
  color: #fff;
  font-size: clamp(30px, 5vw, 46px);
  max-width: 720px;
  margin: 0 auto 34px;
}

/* ---------- Footer ---------- */

footer {
  background: var(--tinta);
  color: rgba(250, 247, 241, 0.55);
  padding: 32px 0;
  border-top: 1px solid rgba(250, 247, 241, 0.1);
}

footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
}

footer a:hover { color: var(--verde); }

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-social:hover {
  color: var(--verde);
  transform: translateY(-2px);
}