/* =========================================================
   DISEÑO VISUAL · NAVEGACIÓN DE LOS NUEVOS CAPÍTULOS
   ========================================================= */
.design-nav {
  position: relative;
  align-self: center;
  font-size: 0.9rem;
}
.design-nav summary {
  padding: 10px 0;
  list-style: none;
  cursor: pointer;
}
.design-nav summary::-webkit-details-marker {
  display: none;
}
.design-nav summary::marker {
  content: "";
}
.design-nav[open] > summary,
.design-nav > summary:hover {
  color: var(--blue);
}
.design-nav nav {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 270px;
  padding: 10px;
  background: white;
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px #18213a18;
  border-radius: 14px;
}
.design-nav nav::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -10px;
  height: 10px;
}
#main-nav .design-nav nav a {
  display: block;
  padding: 11px 13px;
  font-size: 0.85rem;
  border-radius: 8px;
}
#main-nav .design-nav nav a:hover,
#main-nav .design-nav nav a:focus-visible {
  background: #eef1ff;
  color: var(--blue);
}
.design-theme {
  background: #f0f4ff;
}
.design-three,
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}
.design-three article {
  border: 1px solid var(--line);
  padding: 25px;
  border-radius: 16px;
}
.design-three article p {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0;
}
.design-three h3 {
  font-size: 1.2rem;
}
.design-definitions {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 15px 25px;
  margin-top: 28px;
}
.design-definitions dt {
  font-weight: 800;
}
.design-definitions dd {
  color: var(--muted);
  margin: 0;
}
input[type="text"] {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  background: white;
}
.section.container > select {
  max-width: 520px;
  margin: 10px 0 20px;
}

/* 01. COMPARACIÓN DE JERARQUÍA */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.hierarchy-example {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}
.hierarchy-example figcaption {
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
  font-size: 0.85rem;
  font-weight: 800;
}
.hierarchy-example article {
  padding: 30px;
}
.hierarchy-example button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: white;
  padding: 10px 15px;
  border-radius: 8px;
  opacity: 1;
}
.flat h3,
.flat p,
.flat button {
  font:
    400 1rem/1.6 Manrope,
    sans-serif;
  color: #59657c;
  letter-spacing: 0;
  margin-bottom: 16px;
}
.ordered h3 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.15;
}
.ordered .mini-kicker {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  font-weight: 800;
  color: var(--blue);
}
.ordered .mini-meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 22px 0;
}
.ordered button {
  background: var(--blue);
  color: white;
  border: 0;
  font-weight: 800;
}

/* 02. RETÍCULA DE DOCE COLUMNAS */
.grid12-stage {
  --gutter: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  min-width: 0;
  background: #f8faff;
}
.column-ruler {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
  margin-bottom: 18px;
}
.column-ruler span {
  text-align: center;
  font-size: 0.65rem;
  background: #dde4ff;
  min-height: 42px;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.grid12-stage.no-guides .column-ruler {
  opacity: 0;
}
#grid12-preview {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}
.grid12-block {
  padding: 14px 10px;
  background: #233de0;
  color: white;
  border-radius: 10px;
  min-width: 0;
  min-height: 140px;
  overflow-wrap: anywhere;
}
.grid12-block h3 {
  font-size: 1.1rem;
}
.grid12-block p {
  font-size: 0.8rem;
  color: white;
}
#grid12-explanation {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 20px 0 0;
}

/* 03. DISTRIBUCIONES: LOS BLOQUES SON ESQUEMAS, NO OTRA PÁGINA */
.layout-preview {
  display: grid;
  gap: 12px;
  padding: 24px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  min-height: 450px;
}
.layout-preview > header,
.layout-preview > nav,
.layout-preview > footer,
.layout-preview > article,
.layout-preview > aside,
.layout-preview > section {
  padding: 24px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 700;
  min-width: 0;
}
.layout-preview > header {
  grid-area: header;
  background: #dfe6ff;
}
.layout-preview > nav {
  grid-area: nav;
  background: #e5e9f0;
}
.layout-feature {
  grid-area: feature;
  background: #233de0;
  color: white;
}
.layout-preview > aside {
  grid-area: aside;
  background: #e4edf9;
}
.layout-content {
  grid-area: content;
  background: white;
  border: 1px solid var(--line);
}
.layout-content h3 {
  font-size: 1.25rem;
}
.layout-content p {
  font-weight: 400;
  font-size: 0.875rem;
  margin: 0;
}
.layout-preview > footer {
  grid-area: footer;
  background: #e5e9f0;
}
.layout-landing {
  grid-template-columns: 2fr 1fr;
  grid-template-areas: "header nav" "feature feature" "content aside" "footer footer";
}
.layout-editorial {
  grid-template-columns: 3fr 1fr;
  grid-template-areas: "header header" "nav nav" "feature aside" "content aside" "footer footer";
}
.layout-shop {
  grid-template-columns: 1fr 3fr;
  grid-template-areas: "header header" "nav nav" "aside feature" "aside content" "footer footer";
}
.layout-dashboard {
  grid-template-columns: 1fr 3fr;
  grid-template-areas: "nav header" "nav feature" "nav content" "aside content" "footer footer";
}
.layout-portfolio {
  grid-template-columns: 1fr 1fr;
  grid-template-areas: "header nav" "feature aside" "content content" "footer footer";
}
.layout-docs {
  grid-template-columns: 1fr 3fr 1fr;
  grid-template-areas: "header header header" "nav feature aside" "nav content aside" "footer footer footer";
}

/* 04. ESPACIO Y PRINCIPIOS */
.spacing-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: end;
  margin: 30px 0;
}
.spacing-scale figure {
  margin: 0;
}
.spacing-scale span {
  height: 30px;
  background: var(--blue);
  display: block;
  border-radius: 4px;
}
.spacing-scale figcaption {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 6px;
}
#spacing-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: #edf1ff;
  border: 1px solid #cfd8fb;
  border-radius: 18px;
  padding: 24px;
}
#spacing-card > * {
  margin: 0;
}
#spacing-card button {
  padding: 12px 18px;
  border: 0;
  background: var(--blue);
  color: white;
  font-weight: 800;
  border-radius: 9px;
  width: fit-content;
  opacity: 1;
}
.principle-grid {
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 30px;
}
.principle-grid article {
  padding: 24px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.principle-grid article > span {
  font:
    700 3rem "Space Grotesk",
    sans-serif;
  color: var(--blue);
}
.principle-grid h3 {
  margin: 15px 0;
  font-size: 1.2rem;
}
.principle-grid p {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}
.crap-preview {
  padding: 26px;
  background: #f7f9ff;
  border: 1px solid var(--line);
  border-radius: 18px;
}
.crap-preview h3 {
  font-size: 1.1rem;
  font-weight: 400;
  color: #59657c;
}
.crap-preview.contrast h3 {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--ink);
}
.crap-preview article {
  background: white;
  padding: 20px;
  border-radius: 12px;
  margin: 20px 0;
}
.crap-preview article h4 {
  margin: 0 0 32px;
}
.crap-preview.proximity article h4 {
  margin-bottom: 8px;
}
.crap-preview article p {
  margin: 0;
  font-size: 0.9rem;
}
.crap-preview:not(.alignment) article:first-of-type {
  margin-left: 30px;
}
.crap-preview:not(.alignment) article:last-of-type {
  margin-right: 25px;
  text-align: right;
}
.crap-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.crap-actions button {
  padding: 10px;
  border: 1px solid #192238;
  border-radius: 4px;
  background: #ffd7b8;
  color: #192238;
  opacity: 1;
}
.crap-preview:not(.repetition) button:last-child {
  border-radius: 30px;
  background: #dde6fc;
  font-family: Georgia, serif;
}
.crap-preview.repetition button {
  border: 0;
  background: var(--blue);
  color: white;
  border-radius: 9px;
  font:
    800 0.9rem Manrope,
    sans-serif;
}

/* 05. FAMILIAS Y SISTEMA TIPOGRÁFICO */
#font-sample {
  max-width: 440px;
  margin: 10px 0;
}
.font-family-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 26px;
}
.font-family-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  min-width: 0;
}
.font-family-name {
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  font-weight: 800;
  color: var(--muted);
}
.font-aa {
  font-size: 3.6rem;
  line-height: 1.15;
  margin: 20px 0 8px;
}
.font-word {
  font-size: 2.4rem;
  line-height: 1.4;
  overflow-wrap: anywhere;
}
.font-family-card h3 {
  font-size: 1.05rem;
  margin-top: 20px;
  letter-spacing: 0;
}
.font-family-card p:not(.font-aa):not(.font-word):not(.font-family-name) {
  font-size: 0.875rem;
}
.font-family-card a {
  font-size: 0.8rem;
  font-weight: 700;
}
.business-preview {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #f6f8ff;
  padding: 34px;
  min-width: 0;
}
.business-preview .preview-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  font-weight: 800;
}
.business-preview h3 {
  font-size: 2.5rem;
  overflow-wrap: anywhere;
}
.business-preview button {
  margin-top: 15px;
  padding: 13px 20px;
  border-radius: 9px;
  color: white;
  background: var(--blue);
  border: 1px solid transparent;
  opacity: 1;
  font-weight: 800;
}
.business-preview small {
  display: block;
  margin-top: 24px;
  font-size: 0.8rem;
}
.type-scale-preview {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
}
.type-scale-preview .scale-title {
  margin-bottom: 24px;
  overflow-wrap: anywhere;
}
.type-scale-preview .scale-subtitle {
  margin: 0 0 20px;
}
.type-scale-preview .scale-label {
  font-weight: 800;
  letter-spacing: 0.1em;
}
.scale-small {
  color: var(--muted);
}

/* 06. COLOR, PALETAS Y CONTRASTE */
.tone-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.tone-buttons button {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-weight: 700;
}
.tone-buttons button > span {
  width: 22px;
  height: 22px;
  border: 1px solid #9ca3b5;
  background: var(--tone);
  border-radius: 50%;
}
.tone-buttons button[aria-pressed="true"] {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
.tone-description {
  padding: 26px 0;
}
.tone-description h3 {
  font-size: 2rem;
}
#tone-voice {
  font-weight: 800;
}
.harmony-swatches {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.harmony-swatches figure {
  margin: 0;
  min-width: 0;
}
.harmony-swatches span {
  display: block;
  height: 180px;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.harmony-swatches figcaption {
  font:
    400 0.75rem/1.5 "JetBrains Mono",
    monospace;
  margin-top: 12px;
  overflow-wrap: anywhere;
}
#harmony-description {
  margin-top: 24px;
}
.palette-preview {
  padding: 30px;
  background: var(--palette-base, #fff9f1);
  color: var(--base-ink, #18213a);
  border: 1px solid var(--line);
  border-radius: 20px;
}
.palette-preview header > p {
  font-size: 0.8rem;
  font-weight: 800;
}
.palette-preview h3 {
  font-size: 2.1rem;
  overflow-wrap: anywhere;
}
.palette-preview section {
  padding: 22px;
  background: var(--palette-secondary, #f0dcc4);
  color: var(--secondary-ink, #18213a);
  border-radius: 14px;
  margin: 24px 0;
}
.palette-preview section h4 {
  margin: 0 0 12px;
}
.palette-preview section p {
  margin: 0;
}
.palette-preview button {
  background: var(--palette-accent, #87361d);
  color: var(--accent-ink, white);
  border: 1px solid currentColor;
  border-radius: 9px;
  padding: 12px 20px;
  font-weight: 800;
  opacity: 1;
}
.palette-preview small {
  display: block;
  font-size: 0.75rem;
  line-height: 1.6;
  margin-top: 20px;
}
.palette-preview p {
  color: inherit;
}
.ratio-bar {
  display: grid;
  grid-template-columns: 6fr 3fr 1fr;
  min-height: 130px;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.ratio-bar > span {
  display: grid;
  align-content: center;
  text-align: center;
  padding: 12px 2px;
  font-weight: 800;
  background: #fff9f1;
  color: #18213a;
}
.ratio-bar > span:nth-child(2) {
  background: #f0dcc4;
}
.ratio-bar > span:nth-child(3) {
  background: #87361d;
  color: white;
}
.ratio-bar small {
  display: block;
  font-size: 0.7rem;
}
.contrast-preview {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 18px;
}
.contrast-preview output {
  display: block;
  font:
    700 2.5rem "Space Grotesk",
    sans-serif;
  margin: 24px 0 15px;
}
.contrast-preview p {
  color: inherit;
}
.contrast-preview output,
.contrast-preview #contrast-result {
  color: #18213a;
  background: #fff;
  border: 1px solid #e1e6f0;
  padding: 12px;
  border-radius: 10px;
}

/* 07. MÓVIL Y TEXTO AMPLIADO */
@media (max-width: 1000px) {
  .font-family-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .nav-inner {
    gap: 16px;
  }
  #main-nav {
    gap: 20px;
  }
}
@media (max-width: 750px) {
  .comparison-grid,
  .design-three {
    grid-template-columns: 1fr;
  }
  .design-nav nav {
    position: static;
    box-shadow: none;
    margin-top: 8px;
    width: 100%;
  }
  .design-nav {
    width: 100%;
  }
  .design-nav summary {
    padding: 10px;
  }
  .font-family-grid {
    grid-template-columns: 1fr;
  }
  .layout-preview {
    grid-template-columns: 1fr;
    grid-template-areas: "header" "nav" "feature" "content" "aside" "footer";
    padding: 16px;
  }
  .layout-preview > header,
  .layout-preview > nav,
  .layout-preview > footer,
  .layout-preview > article,
  .layout-preview > aside,
  .layout-preview > section {
    padding: 16px;
  }
  .harmony-swatches {
    gap: 8px;
  }
  .harmony-swatches span {
    height: 120px;
  }
  .business-preview,
  .palette-preview {
    padding: 24px;
  }
  .design-definitions {
    grid-template-columns: 1fr;
  }
  .grid12-stage {
    padding: 12px;
    overflow: auto;
  }
  .column-ruler,
  #grid12-preview {
    min-width: 500px;
  }
  .grid12-block {
    font-size: 0.8rem;
    padding: 12px 5px;
  }
  .grid12-block h3 {
    font-size: 0.875rem;
  }
}
@media (max-width: 400px) {
  .principle-grid {
    grid-template-columns: 1fr;
  }
  .hierarchy-example article {
    padding: 22px;
  }
}