/* === Fruere rail: columna lateral de las páginas internas — mantener IDÉNTICO en las 3 propiedades (recreo, resuelve, tutoriales) ===
   Cada propiedad aporta sus colores y tipografías con variables en su :root:
   --rail-ink, --rail-soft, --rail-line, --rail-accent, --rail-surface, --rail-head-font, --rail-main-max, --rail-narrow-max, --rail-narrow-pad */

/* Por defecto (pantallas angostas): el contenido queda como siempre y la columna pasa debajo, sin índice. */
.page-layout{ padding: 0; }
.rail{
  max-width: calc(var(--rail-narrow-max, 832px) + 2 * var(--rail-narrow-pad, 24px));
  margin: 8px auto 48px;
  padding: 0 var(--rail-narrow-pad, 24px);
}
.rail:empty{ display: none; }
.rail-toc{ display: none; }
.rail-block + .rail-block{ margin-top: 28px; }
.rail-label{
  font-family: var(--rail-head-font, inherit);
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--rail-accent, currentColor);
  margin: 0 0 12px;
}
.rail-toc ol{ list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--rail-line, rgba(0,0,0,0.12)); }
.rail-toc a{
  display: block;
  padding: 6px 0 6px 14px;
  margin-left: -2px;
  border-left: 2px solid transparent;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--rail-soft, inherit);
  text-decoration: none;
}
.rail-toc a:hover{ color: var(--rail-ink, inherit); }
.rail-toc a.is-active{ color: var(--rail-accent, inherit); border-left-color: var(--rail-accent, currentColor); font-weight: 600; }
.rail-list{ display: flex; flex-direction: column; }
.rail-item{
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  margin-bottom: 10px;
  border: 1px solid var(--rail-line, rgba(0,0,0,0.12));
  border-radius: 12px;
  background: var(--rail-surface, #FFFFFF);
  color: inherit;
  text-decoration: none;
}
.rail-item:hover{ border-color: var(--rail-accent, currentColor); }
.rail-icon{ font-size: 20px; line-height: 1.2; flex: none; }
.rail-text{ min-width: 0; }
.rail-text strong{
  display: block;
  font-family: var(--rail-head-font, inherit);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--rail-ink, inherit);
}
.rail-text small{
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  margin-top: 3px;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--rail-soft, inherit);
}
.rail-all{ display: inline-block; margin-top: 2px; font-size: 13.5px; font-weight: 600; color: var(--rail-accent, inherit); text-decoration: none; }
.rail-all:hover{ text-decoration: underline; }
.page-main h2[id]{ scroll-margin-top: 24px; }
.rail a:focus-visible{ outline: 2px solid var(--rail-accent, currentColor); outline-offset: 2px; border-radius: 6px; }

/* Pantallas anchas: contenido + columna lateral */
@media (min-width: 1100px){
  .page-layout{
    max-width: var(--page-max, 1180px);
    margin: 0 auto;
    padding: 0 var(--fruere-gutter, 24px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: 56px;
    align-items: start;
  }
  .page-layout .page-main > :where(.tool-page, .tutorial-page){
    max-width: var(--rail-main-max, 780px);
    margin-left: 0;
    margin-right: 0;
    padding-left: 0;
    padding-right: 0;
  }
  .rail{
    position: sticky;
    top: 24px;
    max-width: none;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    margin: 0;
    padding: 20px 0 24px;
  }
  .rail-toc{ display: block; }
  .page-layout.no-rail{ display: block; padding: 0; }
  .page-layout.no-rail .rail{ display: none; }
}