/* ---------- Reset sencillo ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #0f172a;
  background: #f3f4ff;
  line-height: 1.6;
}

/* ---------- Utilidades ---------- */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: #e5edff;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: #0f172a;
}

h1 {
  font-size: clamp(2.2rem, 3vw + 1rem, 3rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: 1.9rem;
}

h3 {
  font-size: 1.2rem;
}

p {
  margin-top: 0.5rem;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: #64748b;
  margin-bottom: 0.25rem;
}

.small-text {
  font-size: 0.9rem;
  color: #64748b;
}

.tagline {
  font-weight: 500;
  margin-top: 1rem;
}

/* ---------- Botones ---------- */

.btn-primario,
.btn-secundario {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease,
    color 0.1s ease, border-color 0.1s ease;
}

.btn-primario {
  background: #2563eb;
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.25);
}

.btn-primario:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.35);
}

.btn-secundario {
  background: #e0edff;
  color: #1d4ed8;
  border-color: #bfdbfe;
}

.btn-secundario:hover {
  background: #d0e4ff;
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

/* ---------- Navegación ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(148, 163, 184, 0.2);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
}

.logo span {
  color: #2563eb;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  font-size: 0.9rem;
}

.nav-links a {
  text-decoration: none;
  color: #475569;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  background: #2563eb;
  transition: width 0.2s ease;
}

.nav-links a:hover {
  color: #0f172a;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  margin-left: 1rem;
}

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

.hero {
  padding: 4.5rem 0 3.5rem;
  background: radial-gradient(circle at top left, #dbeafe 0, #eff6ff 40%, #f9fafb 100%);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}

.hero-highlight {
  background: #e0edff;
  border-radius: 1rem;
  padding: 1rem 1.2rem;
  margin-top: 1rem;
  font-size: 0.95rem;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-small {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: #64748b;
}

/* ---------- Libros ---------- */

.hero-books {
  background: #ffffff;
  border-radius: 1.5rem;
  padding: 1.5rem;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
}

.book-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.book-card {
  border-radius: 1rem;
  padding: 1rem;
  border: 1px solid #e2e8f0;
  background: linear-gradient(135deg, #1d4ed8 0, #f97316 60%, #fefce8 100%);
  color: #0f172a;
}

.book-card p {
  margin-top: 0.7rem;
}

.book-cover {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.book-title {
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.book-author {
  font-size: 0.85rem;
}

/* ---------- Quiénes, métricas ---------- */

.quienes-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 2.5rem;
  margin-top: 1.5rem;
}

.card {
  background: #ffffff;
  border-radius: 1.2rem;
  padding: 1.4rem 1.5rem;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
  border: 1px solid #e2e8f0;
}

.lista-pasos {
  padding-left: 1.2rem;
  margin: 0.5rem 0 0;
}

.lista-pasos li + li {
  margin-top: 0.4rem;
}

.metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.metric-item {
  flex: 1 1 140px;
}

.metric-item h3 {
  font-size: 1.6rem;
  margin-bottom: 0.2rem;
}

/* ---------- Features / tarjetas ---------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 1.8rem;
}

.feature-card {
  background: #ffffff;
  border-radius: 1.1rem;
  padding: 1.3rem 1.4rem;
  border: 1px solid #e2e8f0;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

/* ---------- CTA Participa ---------- */

.cta-section {
  background: radial-gradient(circle at top right, #dbeafe 0, #eef2ff 45%, #f9fafb 100%);
}

.cta-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.cta-aside {
  background: #ffffff;
  border-radius: 1.5rem;
  padding: 1.5rem 1.7rem;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
  border: 1px solid #e2e8f0;
}

.cta-actions {
  margin-top: 1.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- Formularios ---------- */

.form-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.form-card {
  background: #ffffff;
  border-radius: 1.3rem;
  padding: 1.6rem 1.7rem;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
  border: 1px solid #e2e8f0;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  border-radius: 0.8rem;
  border: 1px solid #cbd5f5;
  padding: 0.6rem 0.75rem;
  font: inherit;
  background: #f9fbff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid #2563eb;
  outline-offset: 1px;
  background: #ffffff;
}

/* ---------- Contacto ---------- */

.contacto-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.contacto-extra {
  background: #0f172a;
  color: #e2e8f0;
}

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

.site-footer {
  border-top: 1px solid #e2e8f0;
  background: #f8fafc;
  padding: 1.5rem 0;
  font-size: 0.85rem;
}

.footer-layout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

/* ---------- Responsivo ---------- */

@media (max-width: 960px) {
  .hero-layout,
  .quienes-grid,
  .features-grid,
  .cta-layout,
  .form-layout,
  .contacto-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-books {
    margin-top: 2rem;
  }

  .nav {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-cta {
    order: -1;
  }
}

@media (max-width: 640px) {
  .section,
  .hero {
    padding: 3rem 0;
  }

  .nav {
    padding-inline: 1rem;
  }

  .nav-links {
    display: none; /* Si más adelante quieres menú móvil, aquí se revierte con JS */
  }

  .hero-layout {
    gap: 2rem;
  }

  .book-card {
    background: #ffffff;
  }

  .cta-aside,
  .form-card {
    padding: 1.3rem 1.2rem;
  }
}