/* ==========================================================================
   Más Allá de las Estructuras Mentales — hoja de estilos
   ========================================================================== */

:root {
  --bg: #f5f0e6;
  --bg-alt: #ece3d3;
  --paper: #faf7f0;
  --ink: #1f262d;
  --ink-soft: #4d5760;
  --ink-faint: #7c8791;
  --navy: #16232f;
  --navy-2: #1f3341;
  --teal: #3f6d7c;
  --gold: #c8993f;
  --gold-soft: #e8cd93;
  --line: rgba(22, 35, 47, 0.14);
  --shadow: 0 20px 50px rgba(22, 35, 47, 0.12);
  --radius: 4px;
  --maxw: 1120px;
  --serif: 'Cormorant Garamond', 'Georgia', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10181f;
    --bg-alt: #16222b;
    --paper: #16222b;
    --ink: #ece5d6;
    --ink-soft: #c9c2b3;
    --ink-faint: #8b9198;
    --line: rgba(232, 205, 147, 0.16);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

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

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 14px;
  display: inline-block;
}

section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-head {
  max-width: 680px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head h2 { font-size: clamp(2rem, 3.4vw, 2.7rem); }
.section-head p { color: var(--ink-soft); font-size: 1.08rem; margin-top: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn-gold {
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  color: var(--navy);
  box-shadow: 0 10px 24px rgba(200, 153, 63, 0.35);
}
.btn-gold:hover { box-shadow: 0 14px 30px rgba(200, 153, 63, 0.45); }

.btn-outline {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}
@media (prefers-color-scheme: dark) {
  .btn-outline { border-color: var(--ink-soft); color: var(--ink); }
}
.btn-outline:hover { background: var(--ink); color: var(--bg); }

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink-faint);
  font-size: 0.9rem;
  padding: 15px 24px;
}
.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--ink);
  background: transparent;
}

.btn-block { width: 100%; justify-content: center; }

/* ---------- Header ---------- */
header.site {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(245, 240, 230, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: background .3s ease;
}
@media (prefers-color-scheme: dark) {
  header.site { background: rgba(16, 24, 31, 0.86); }
}

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

.brand {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.brand span { color: var(--gold); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color .2s ease;
}
.nav-links a:hover { color: var(--gold); }

.nav-cta { display: flex; align-items: center; gap: 22px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  padding: 108px 0 60px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 75% 20%, rgba(200,153,63,0.16), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg-alt));
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

.hero-text .kicker {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 20px;
  display: block;
}

.hero-text h1 {
  font-size: clamp(2.6rem, 5vw, 4rem);
  margin-bottom: 6px;
}

.hero-text .subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.hero-text .lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 62ch;
  margin-bottom: 18px;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 34px; }

.hero-author {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--ink-faint);
}
.hero-author strong { color: var(--ink); font-weight: 600; }
.hero-author .divider { width: 34px; height: 1px; background: var(--line); }

.hero-cover {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-cover img {
  width: min(340px, 80%);
  border-radius: 6px;
  box-shadow: var(--shadow);
  transform: rotate(1.2deg);
}
.hero-cover::after {
  content: '';
  position: absolute;
  width: 80%;
  height: 80%;
  top: 12%;
  left: 8%;
  background: radial-gradient(circle, rgba(200,153,63,0.28), transparent 70%);
  filter: blur(30px);
  z-index: -1;
}

/* ---------- Epígrafe ---------- */
.epigraph {
  padding: 70px 0;
  background: var(--navy);
  color: var(--bg);
  text-align: center;
}
.epigraph blockquote {
  margin: 0 auto;
  max-width: 780px;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  line-height: 1.5;
  color: #f2ead9;
}
.epigraph cite {
  display: block;
  margin-top: 22px;
  font-family: var(--sans);
  font-style: normal;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-soft);
}

/* ---------- Sobre el libro ---------- */
.book-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 60px;
  align-items: start;
}
.book-cover-wrap img {
  border-radius: 6px;
  box-shadow: var(--shadow);
}
.book-copy p { color: var(--ink-soft); margin-bottom: 18px; }
.book-copy p.lead {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.45;
  margin-bottom: 26px;
}
.book-meta {
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  font-size: 0.88rem;
  color: var(--ink-faint);
}
.book-meta strong { color: var(--ink); display: block; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 4px; }

/* ---------- Índice / contenido ---------- */
.parts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.part-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px 30px;
}
.part-card .part-num {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.part-card h3 { font-size: 1.4rem; margin-bottom: 20px; }
.part-card ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: chap;
}
.part-card li {
  counter-increment: chap;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.97rem;
  display: flex;
  gap: 10px;
}
.part-card li:first-child { border-top: none; }
.part-card li::before {
  content: counter(chap, decimal-leading-zero);
  font-family: var(--serif);
  color: var(--gold);
  font-weight: 600;
  flex-shrink: 0;
}

/* ---------- Extracto ---------- */
.excerpt {
  background: var(--navy);
  color: #ece5d6;
  position: relative;
}
.excerpt .section-head h2,
.excerpt .eyebrow { color: #f2ead9; }
.excerpt .section-head p { color: #b9c3ca; }
.excerpt-card {
  max-width: 780px;
  margin: 0 auto;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(232,205,147,0.18);
  border-radius: 10px;
  padding: 52px;
}
.excerpt-card p {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.75;
  color: #e4dccb;
  margin-bottom: 22px;
}
.excerpt-card p:last-of-type { margin-bottom: 0; }
.excerpt-mark {
  font-family: var(--serif);
  font-size: 3.5rem;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 6px;
  opacity: .8;
}
.excerpt-cta { text-align: center; margin-top: 40px; }

/* ---------- Autor ---------- */
.author-grid {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 56px;
  align-items: center;
}
.author-portrait {
  aspect-ratio: 4/5;
  border-radius: 8px;
  background: linear-gradient(160deg, var(--navy), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-family: var(--serif);
  font-style: italic;
  text-align: center;
  padding: 20px;
  box-shadow: var(--shadow);
}
.author-copy p { color: var(--ink-soft); margin-bottom: 16px; }
.author-socials { display: flex; gap: 16px; margin-top: 28px; }

/* ---------- Página /autor ---------- */
.autor-page { padding: 160px 0 100px; }
.autor-page-container { max-width: 720px; }
.autor-page .section-head { max-width: none; text-align: left; margin-left: 0; }
.autor-page .section-head h1 { font-size: clamp(2.2rem, 4vw, 3rem); }
.autor-page-portrait {
  aspect-ratio: 16/10;
  border-radius: 8px;
  background: linear-gradient(160deg, var(--navy), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-family: var(--serif);
  font-style: italic;
  text-align: center;
  margin-bottom: 48px;
  box-shadow: var(--shadow);
}
.autor-page-bio p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 26px;
}
.autor-page-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 48px; }

@media (max-width: 760px) {
  .autor-page { padding: 130px 0 70px; }
}
.author-socials a {
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
  transition: all .2s ease;
}
.author-socials a:hover { background: var(--gold); border-color: var(--gold); color: var(--navy); }

/* ---------- Comunidad ---------- */
.community {
  background: var(--bg-alt);
}
.community-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}
.community-copy p { color: var(--ink-soft); margin-bottom: 20px; }
.community-list { list-style: none; margin: 0 0 26px; padding: 0; }
.community-list li {
  display: flex; gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.97rem;
}
.community-list li:first-child { border-top: none; }
.community-list li .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold);
  margin-top: 9px;
  flex-shrink: 0;
}

.form-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 40px;
  box-shadow: var(--shadow);
}
.form-card--plain {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.form-card h3 { font-size: 1.5rem; margin-bottom: 8px; }
.form-card .form-sub { color: var(--ink-faint); font-size: 0.92rem; margin-bottom: 24px; }

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 7px;
}
.field input,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.96rem;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--gold);
}
.form-note {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--ink-faint);
  text-align: center;
}
.form-success {
  display: none;
  text-align: center;
  padding: 20px;
  color: var(--teal);
  font-weight: 600;
}

/* ---------- Reseña Amazon ---------- */
.review-cta {
  text-align: center;
}
.review-cta .stars {
  color: var(--gold);
  font-size: 1.6rem;
  letter-spacing: 4px;
  margin-bottom: 18px;
}
.review-cta p {
  max-width: 560px;
  margin: 0 auto 30px;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

/* ---------- Contacto ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}
.contact-info h2 { font-size: clamp(2rem, 3.4vw, 2.6rem); margin-bottom: 18px; }
.contact-info p { color: var(--ink-soft); margin-bottom: 26px; max-width: 42ch; }
.contact-detail { margin-bottom: 20px; }
.contact-detail strong {
  display: block; font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 4px;
}
.contact-detail a, .contact-detail span { font-size: 1.05rem; color: var(--ink); }

/* ---------- Footer ---------- */
footer.site {
  background: var(--navy);
  color: #cdd6dc;
  padding: 64px 0 30px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand { font-family: var(--serif); font-size: 1.3rem; color: #f2ead9; margin-bottom: 12px; }
.footer-top p { color: #93a1ab; font-size: 0.93rem; max-width: 34ch; }
.footer-col h4 { color: #f2ead9; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 16px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: #93a1ab; font-size: 0.93rem; transition: color .2s ease; }
.footer-col a:hover { color: var(--gold-soft); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 26px;
  font-size: 0.82rem;
  color: #7e8b95;
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .parts { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-cover { order: -1; }
  .hero-cover img { width: min(280px, 70%); }
  .book-grid, .author-grid, .community-grid, .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .parts { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-links, .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 24px 28px;
    border-bottom: 1px solid var(--line);
    gap: 18px;
  }
  section { padding: 64px 0; }
  .hero { padding-top: 140px; }
  .excerpt-card { padding: 30px; }
  .form-card { padding: 28px; }
}