/* ==========================================================================
   Elements Ink — Layout
   Contenedor, secciones, grillas editoriales, cabecera y pie de página.
   ========================================================================== */

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: calc(860px + var(--gutter) * 2);
}

main {
  display: block;
}

.section {
  padding-block: var(--space-section);
}

.section--tight {
  padding-block: calc(var(--space-section) * 0.6);
}

.section--flush-top {
  padding-top: 0;
}

.section--surface {
  background: var(--c-surface);
}

.section--sand {
  background: var(--c-sand);
}

.section--sand .text-muted,
.section--sand .lead {
  color: var(--c-ink-2-sand);
}

.section--sand .label {
  color: var(--c-olive-deep);
}

.section + .section--ruled {
  border-top: var(--rule);
}

/* Cabecera de sección: etiqueta, título y descripción */
.section-head {
  display: grid;
  gap: var(--space-m);
  margin-bottom: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
}

.section-head--split {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: end;
  column-gap: clamp(2rem, 5vw, 6rem);
}

.section-head--split > .lead {
  padding-bottom: 0.35em;
}

.section-head--center {
  text-align: center;
  justify-items: center;
}

.section-head h2 {
  max-width: 18ch;
}

.section-head--center h2 {
  max-width: 20ch;
}

/* Grillas */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 6rem);
  align-items: center;
}

.split--5-7 {
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
}

.split--7-5 {
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
}

.split--top {
  align-items: start;
}

.split--reverse > :first-child {
  order: 2;
}

.stack > * + * {
  margin-top: var(--space-m);
}

.stack-s > * + * {
  margin-top: var(--space-s);
}

.stack-l > * + * {
  margin-top: var(--space-l);
}

.sticky-col {
  position: sticky;
  top: calc(var(--header-h) + 2rem);
}

/* --------------------------------------------------------------------------
   Cabecera fija
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--c-line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-l);
  min-height: var(--header-h);
}

/* Wordmark temporal (reemplazable por el SVG oficial, ver README) */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--c-ink);
  flex-shrink: 0;
  min-height: 44px;
}

.brand:hover {
  color: var(--c-ink);
}

.brand__mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  color: var(--c-olive);
}

.brand__word {
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
}

.brand__elements {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.brand__ink {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.45rem;
  letter-spacing: 0;
  color: var(--c-olive);
}

/* Navegación de escritorio */
.nav {
  display: flex;
  align-items: center;
}

.nav__toggle {
  display: none;
}

.nav__panel {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.2vw, 2.25rem);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.6vw, 1.75rem);
}

.nav__item {
  position: relative;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
  padding: 0;
  background: none;
  border: 0;
  font-size: 0.95rem;
  font-weight: 450;
  color: var(--c-ink);
  text-decoration: none;
  position: relative;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 9px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after,
.nav__link.is-section::after {
  transform: scaleX(1);
}

.nav__link:hover {
  color: var(--c-ink);
}

.nav__chevron {
  width: 10px;
  height: 10px;
  transition: transform var(--dur) var(--ease);
}

.nav__sub-toggle[aria-expanded="true"] .nav__chevron {
  transform: rotate(180deg);
}

.nav__sub-label {
  display: none;
}

.nav__sub {
  position: absolute;
  top: calc(100% + 6px);
  left: -1.25rem;
  width: 330px;
  padding: 0.6rem;
  background: var(--c-surface);
  border: var(--rule);
  border-radius: var(--radius-m);
  box-shadow: 0 18px 40px rgba(36, 38, 33, 0.08);
  display: none;
}

.nav__sub a {
  display: block;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-s);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  line-height: 1.3;
}

.nav__sub a span {
  display: block;
  margin-top: 0.2rem;
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--c-ink-2);
}

.nav__sub a:hover,
.nav__sub a[aria-current="page"] {
  background: var(--c-bg);
  color: var(--c-ink);
}

/* Sin JS: el submenú se abre con hover y foco */
.no-js .nav__item--has-sub:hover .nav__sub,
.no-js .nav__item--has-sub:focus-within .nav__sub,
.nav__sub.is-open {
  display: block;
}

/* --------------------------------------------------------------------------
   Pie de página
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--c-ink);
  color: var(--c-on-ink);
  padding-top: clamp(4rem, 3rem + 4vw, 6.5rem);
  padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
}

.site-footer a {
  color: var(--c-on-ink);
  text-decoration: none;
}

.site-footer a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.site-footer :focus-visible {
  outline-color: var(--c-sand);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 4rem);
}

.footer__brand .brand {
  color: var(--c-on-ink);
}

.footer__brand .brand__ink,
.footer__brand .brand__mark {
  color: var(--c-sand);
}

.footer__tagline {
  margin-top: var(--space-m);
  max-width: 32ch;
  font-family: var(--font-serif);
  font-size: 1.55rem;
  line-height: 1.25;
  color: var(--c-on-ink);
}

.footer__since {
  margin-top: var(--space-m);
  font-size: var(--fs-sm);
  color: var(--c-on-ink-2);
}

.footer__title {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--c-on-ink-2);
  margin-bottom: var(--space-m);
}

.footer__list li + li {
  margin-top: 0.55rem;
}

.footer__list a {
  display: inline-block;
  padding-block: 0.2rem;
}

.footer__contact dt {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-on-ink-2);
}

.footer__contact dd {
  margin: 0.15rem 0 1rem;
  overflow-wrap: anywhere;
}

.footer__note {
  display: block;
  margin-top: 0.15rem;
  font-size: var(--fs-xs);
  color: var(--c-on-ink-2);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-s);
  margin-top: clamp(3rem, 2rem + 4vw, 5rem);
  padding-top: var(--space-m);
  border-top: 1px solid rgba(248, 247, 244, 0.14);
  font-size: var(--fs-sm);
  color: var(--c-on-ink-2);
}

/* Espacio para que el botón flotante nunca tape el pie */
.footer__bottom {
  padding-right: 76px;
}