:root {
  --bg: #faf7fb;
  --bg-card: #ffffff;
  --bg-soft: #f2ecff;
  --accent: #d977ef;
  --accent-strong: #c026d3;
  --accent-soft: rgba(217,119,239,0.12);
  --text: #2d1b2f;
  --text-soft: #6b4a6b;
  --border: #e5d4ef;
  --radius-lg: 1.2rem;
  --radius-full: 999px;
  --shadow-soft: 0 12px 28px rgba(90,60,120,0.12);
  --transition-fast: 120ms ease-out;
  --transition-med: 180ms ease-out;
}

/* Dark mode auto (opcional) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070520;
    --bg-card: #0b072b;
    --bg-soft: #05051a;
    --accent: #e879f9;
    --accent-strong: #f472b6;
    --accent-soft: rgba(248,113,170,0.15);
    --text: #f9fafb;
    --text-soft: #cbd5f5;
    --border: #312e81;
    --shadow-soft: 0 16px 36px rgba(0,0,0,0.6);
  }
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 40%, var(--bg) 100%);
  color: var(--text);
}

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.4rem;
}

/* Top navigation */
.topnav {
  background: rgba(255,255,255,0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 30;
}
@media (prefers-color-scheme: dark) {
  .topnav {
    background: rgba(15,23,42,0.92);
  }
}

.topnav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.55rem 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
}

.topnav-title {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  color: var(--accent-strong);
}

.topnav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.topnav-links a {
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: 0.78rem;
  border: 1px solid transparent;
  color: var(--text-soft);
  background: transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.topnav-links a:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-strong);
}

/* Hero banner */
.hero {
  position: relative;
  margin: 0;
  padding: 3.2rem 0 3rem;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(15,23,42,0.6), rgba(88,28,135,0.2)),
    url('fractal-hero.png') center/cover no-repeat;
  opacity: 0.7;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(248,250,252,0.22), transparent 55%);
  mix-blend-mode: screen;
  z-index: -1;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.4rem;
  display: grid;
  grid-template-columns: minmax(0,1.7fr) minmax(0,1.3fr);
  align-items: center;
  gap: 2.5rem;
  color: #f9fafb;
}

.hero-title {
  font-size: clamp(2.3rem, 4vw, 2.9rem);
  margin: 0 0 0.6rem;
}

.hero-subtitle {
  margin: 0 0 1.3rem;
  font-size: 1rem;
  max-width: 34rem;
  color: #e5e7eb;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.hero-tag {
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(248,250,252,0.45);
  font-size: 0.75rem;
  color: #e5e7eb;
  background: rgba(15,23,42,0.3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-full);
  border: none;
  background: linear-gradient(135deg, #f97316, #ec4899);
  color: #f9fafb;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  box-shadow: 0 14px 35px rgba(15,23,42,0.6);
  cursor: pointer;
  transition: transform var(--transition-med), box-shadow var(--transition-med), filter var(--transition-med);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
  box-shadow: 0 20px 45px rgba(15,23,42,0.8);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(248,250,252,0.7);
  background: rgba(15,23,42,0.3);
  color: #e5e7eb;
  font-size: 0.85rem;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn-ghost:hover {
  background: var(--bg-card);
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-1px);
}

.hero-badge {
  justify-self: center;
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-badge-inner {
  background: rgba(200,12,125,0.7);
  padding: 1rem 1.2rem;
  border-radius: 1.2rem;
  border: 1px solid rgba(248,250,252,0.3);
  backdrop-filter: blur(10px);
  color: #e5e7eb;
  max-width: 260px;
  text-align: center;
  font-size: 0.9rem;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  padding: 1.6rem 1.5rem 1.8rem;
  margin: 1.4rem 0;
  animation: fadeUp 0.5s ease-out both;
}

.card h1, .card h2 {
  margin-top: 0;
}

/* Titles & breadcrumbs */
.page-title, .card h1 {
  color: var(--accent-strong);
}

.breadcrumb {
  font-size: 0.82rem;
  color: var(--text-soft);
  margin-bottom: 0.35rem;
}

.breadcrumb a {
  color: var(--text-soft);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

.breadcrumb span {
  font-weight: 600;
  color: var(--accent-strong);
}

/* TOC grid with hover on cards */
.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-top: 0.8rem;
}

.toc-block {
  background: #fdfbff;
  border-radius: 0.9rem;
  border: 1px solid var(--border);
  padding: 0.9rem 1rem;
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med), background var(--transition-med);
  cursor: pointer;
}

@media (prefers-color-scheme: dark) {
  .toc-block {
    background: #0b072b;
  }
}

.toc-block:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(90, 60, 120, 0.22);
  border-color: var(--accent);
  background: #fbefff;
}

@media (prefers-color-scheme: dark) {
  .toc-block:hover {
    background: #1f1d3f;
  }
}

.toc-block h3 {
  margin: 0 0 0.35rem;
  font-size: 0.98rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.toc-icon {
  font-size: 1rem;
}

.toc-block ul {
  margin: 0.2rem 0 0;
  padding-left: 1.1rem;
}

.toc-block li {
  margin: 0.08rem 0;
  font-size: 0.9rem;
}

.toc-block a {
  text-decoration: none;
  color: var(--accent-strong);
}

/* Page content */
.page {
  padding: 1.8rem 0 3rem;
}

.page-content p {
  color: var(--text-soft);
  line-height: 1.4;
  margin: 0.6rem 0;
}

/* Navigation buttons */
.page-nav {
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: #ffffff;
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--text-soft);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

@media (prefers-color-scheme: dark) {
  .btn-nav {
    background: #020617;
  }
}

.btn-nav:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-strong);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(90, 60, 120, 0.18);
}

/* Ver también section */
.related {
  margin-top: 1.4rem;
  padding: 0.8rem 1rem;
  border-radius: 0.9rem;
  background: var(--accent-soft);
  border: 1px dashed var(--accent);
  font-size: 0.9rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 1.2rem;
  margin-top: 2rem;
  color: var(--text-soft);
  font-size: 0.85rem;
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-badge {
    justify-self: flex-start;
  }
}

@media (max-width: 800px) {
  .topnav-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-nav {
    flex-direction: column;
    gap: 0.5rem;
    align-items: stretch;
  }
}






/* === Estilos adicionales (listas, cajas, actividades) === */

.list-ideas {
  list-style: none;
  padding-left: 0;
  margin: 0.6rem 0 0.2rem;
}
.list-ideas li {
  position: relative;
  padding-left: 1.6rem;
  margin: 0.25rem 0;
  color: var(--text-soft);
}
.list-ideas li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 0.15rem;
  font-size: 0.9rem;
  color: var(--accent-strong);
}

.list-pasos {
  list-style: none;
  counter-reset: pasos;
  padding-left: 0;
  margin: 0.6rem 0 0.2rem;
}
.list-pasos li {
  counter-increment: pasos;
  position: relative;
  padding-left: 2.1rem;
  margin: 0.35rem 0;
}
.list-pasos li::before {
  content: counter(pasos);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.box-definicion {
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  border-radius: 0.9rem;
  border: 1px solid var(--accent);
  background: var(--accent-soft);
}
.box-definicion h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--accent-strong);
}
.box-definicion p {
  margin: 0.2rem 0;
}

.box-ejemplo {
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  border-radius: 0.9rem;
  border: 1px dashed var(--border);
  background: #fdfbff;
}
.box-ejemplo h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--accent-strong);
}

.box-ejemplo p {
  margin: 0.2rem 0;
}

.box-actividad1 {
  margin: 1rem 0;
  padding: 0.95rem 1rem;
  border-radius: 0.9rem;
  border: 1px solid var(--accent);
  background: #fff7ed;
}
.box-actividad1 h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: #ea580c;
}
.box-actividad1 p {
  margin: 0.25rem 0;
}

.box-resumen {
  margin: 0.8rem 0 1.2rem;
  padding: 0.7rem 1rem;
  border-left: 4px solid var(--accent);
  background: #fdfbff;
  font-size: 0.9rem;
  color: var(--text-soft);
   /* Sombra ligera */
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}


.box-actividad {
  width: 80%;                     /* ancho deseado */
  margin: 1rem auto;              /* centrado horizontal */
  padding: 0.95rem 1rem;

  /* Sin bordes redondeados */
  border-radius: 0;

  /* Bordes */
  border: 1px solid #f0c49c;          /* borde suave */
  border-top: 2px solid var(--accent); /* borde superior destacado */

  background: #fff7ed;

  /* Sombra ligera */
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.box-actividad h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: #ea580c;
}

.box-actividad p {
  margin: 0.25rem 0;
}





.paso-simple {
  margin: 0.6rem 0;
  padding: 0.4rem 0 0.4rem 0.8rem;
  border-left: 3px solid var(--accent);
  color: var(--text-soft);
  line-height: 1.5;
}


/* === Tablas estilo fractales === */
.tabla-fractal {
  width: 90%;
  border-collapse: collapse;
  margin: 0 auto;
  font-size: 0.95rem;
  color: var(--text-soft);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  overflow: hidden;
}

.tabla-fractal th {
  background: var(--accent-soft);
  color: var(--accent-strong);
  text-align: center;
  padding: 0.6rem 0.8rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.tabla-fractal td {
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--border);
}

.tabla-fractal tr:last-child td {
  border-bottom: none;
}

.tabla-fractal tr:hover {
  background: #faf5ff;
}