/* PresagoDS — App shell
 * Layout applicativo condiviso da tutte le pagine:
 * sr-only, sidebar, transizioni di pagina,
 * section base, doc-page layout (heading, content, nav). */

/* ─── Screen-reader only ────────────────────────────── */
.lumia-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─── App shell / Sidebar ───────────────────────────── */
.lumia-app-shell {
  --sidebar-width: calc(var(--spacing-800) * 4);
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

.lumia-sidebar {
  grid-row: span 2;
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  background-color: var(--color-surface-default);
  border-inline-end: var(--border-width-thin) solid var(--color-border-default);
  z-index: var(--z-sidebar);
}

.lumia-sidebar__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--spacing-200);
  gap: var(--spacing-300);
}

.lumia-sidebar__brand-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-100);
}

.lumia-shell__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-100);
  color: var(--color-text-default);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-heading-h3);
  text-decoration: none;
  min-width: 0;
}

/* A brand logo stands a sixth taller than the label beside it, at its own aspect ratio:
 * the sidebar brand and the home theme logo share it. */
.lumia-shell__brand-logo {
  block-size: calc(7em / 6);
  color: var(--color-item-primary-idle);
  flex: none;
}

.lumia-shell__brand-mark {
  color: var(--color-text-subtle);
  font-weight: var(--font-weight-regular);
}

.lumia-sidebar__brand-label,
.lumia-sidebar__nav-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lumia-sidebar__toggle {
  margin-inline-start: auto;
  flex: none;
}

.lumia-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-050);
}

.lumia-sidebar__nav .lumia-button {
  justify-content: flex-start;
  width: 100%;
  gap: var(--spacing-150);
}

.lumia-sidebar__nav .lumia-button:not([href]) {
  pointer-events: none;
}

.lumia-sidebar__page-nav {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.lumia-sidebar__version {
  margin: auto 0 0;
  color: var(--color-text-subtle);
  font-size: var(--font-size-caption);
}

.lumia-sidebar__page-nav:not(:empty) {
  padding-top: var(--spacing-200);
  border-top: var(--border-width-thin) solid var(--color-border-default);
}

/* ─── Header ────────────────────────────────────────── */
/* The Lumia header, holding the theme brand with the page heading as a kicker beside it and the version tag at the opposite end. */
.lumia-shell__header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.lumia-shell__header-brand {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--spacing-200);
  color: var(--color-text-default);
  font-size: var(--font-size-heading-h3);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-none);
}

.lumia-shell__kicker {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-brand);
  font-size: var(--font-size-body-small);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-compact);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-uppercase);
}

.lumia-theme-logo {
  display: flex;
  background-color: currentColor;
  mask-position: center;
  mask-size: contain;
  mask-repeat: no-repeat;
}

.lumia-theme-logo > img {
  block-size: inherit;
  visibility: hidden;
}

/* ─── Theme and variant selects ─────────────────────── */
.lumia-sidebar__selects {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-200);
}

/* ─── Main area / page transitions ──────────────────── */
.lumia-shell__main {
  min-height: 60vh;
  animation: lumia-page-enter var(--motion-duration-medium) var(--motion-easing-standard);
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: var(--motion-duration-medium);
  animation-timing-function: var(--motion-easing-standard);
}

:root[data-page-transition="leaving"] .lumia-shell__main {
  opacity: 0;
  transform: translateY(var(--spacing-100));
  transition: opacity var(--motion-duration-short) var(--motion-easing-standard), transform var(--motion-duration-short) var(--motion-easing-standard);
}

@keyframes lumia-page-enter {
  from {
    opacity: 0;
    transform: translateY(var(--spacing-100));
  }
}

@media (prefers-reduced-motion: reduce) {
  .lumia-shell__main {
    animation: none;
  }

  :root[data-page-transition="leaving"] .lumia-shell__main {
    opacity: 1;
    transform: none;
    transition: none;
  }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }
}

/* ─── Section base ──────────────────────────────────── */
.lumia-section {
  padding: var(--spacing-800) 0;
}

.lumia-section__inner {
  max-width: var(--size-container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-300);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-400);
}

.lumia-section__inner > h2.lumia-heading:not(:first-child) {
  margin-top: var(--spacing-400);
}

.lumia-section__header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-200);
}

.lumia-section__description,
.lumia-section__caption {
  margin: 0;
}

/* Explicit color so that a description inside a heading reads as running text. */
.lumia-section__description {
  color: var(--color-text-default);
  font-size: var(--font-size-body-medium);
  line-height: var(--line-height-body);
}

.lumia-section__caption {
  color: var(--color-text-subtle);
  font-size: var(--font-size-body-small);
  line-height: var(--line-height-body);
}

/* ─── Doc-page layout (tokens, components) ──────────── */
.lumia-doc-layout {
  padding: 0 var(--spacing-300);
}

.lumia-doc-content {
  min-width: 0;
  max-width: var(--size-container-xl);
  margin: 0 auto;
}

.lumia-doc-content .lumia-section {
  padding: var(--spacing-600) 0;
}

.lumia-doc-content .lumia-section__inner {
  padding: 0;
}

.lumia-page-nav {
  min-height: 0;
  overflow-x: clip;
  overflow-y: auto;
  padding-inline-end: var(--spacing-100);
}

.lumia-page-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-100);
}

.lumia-page-nav .lumia-button {
  justify-content: flex-start;
  width: 100%;
}

.lumia-page-nav__details > summary {
  list-style: none;
  cursor: pointer;
}

.lumia-page-nav__details > summary::-webkit-details-marker {
  display: none;
}

.lumia-page-nav__details > summary::before {
  content: "▸";
  color: var(--color-text-subtle);
  font-size: var(--font-size-body-small);
  transition: transform var(--motion-duration-short) var(--motion-easing-emphasized);
}

.lumia-page-nav__details[open] > summary::before {
  transform: rotate(90deg);
}

.lumia-page-nav__details > summary a {
  flex: 1;
  color: inherit;
  text-decoration: none;
}

.lumia-page-nav__details > summary:has(a[aria-current="true"]) {
  background-color: var(--color-surface-raised);
  color: var(--color-text-default);
}

.lumia-page-nav__sublist {
  list-style: none;
  margin: var(--spacing-050) 0 0;
  padding: 0 0 0 var(--spacing-150);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-025);
  border-left: var(--border-width-thin) solid var(--color-border-default);
}

.lumia-doc-content :is(.lumia-heading[id], .lumia-demo[id], .lumia-token-table tbody[id], .lumia-token-table tr[id]) {
  scroll-margin-top: calc(var(--size-header) + var(--spacing-300));
}

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 767px) {
  /* The floating button sits centered in the header height, and the header leaves it room. */
  .lumia-app-shell {
    --floating-inset: calc((var(--size-header) - var(--size-control-md)) / 2);
    grid-template-columns: minmax(0, 1fr);
  }

  .lumia-sidebar {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    width: var(--sidebar-width);
    max-width: 86vw;
    transform: translateX(-100%);
    transition: transform var(--motion-duration-long) var(--motion-easing-standard);
    box-shadow: var(--shadow-md);
  }

  .lumia-app-shell[data-sidebar-open] .lumia-sidebar {
    transform: translateX(0);
  }

  .lumia-app-shell[data-sidebar-open]::before {
    content: "";
    position: fixed;
    inset: 0;
    background-color: color-mix(in srgb, var(--color-surface-default) 92%, transparent);
    backdrop-filter: saturate(140%) blur(8px);
    z-index: var(--z-overlay);
  }

  .lumia-shell__header {
    gap: var(--spacing-200);
    padding-inline-start: calc(var(--floating-inset) + var(--size-control-md) + var(--spacing-200));
  }

  .lumia-sidebar__floating-toggle {
    position: fixed;
    top: var(--floating-inset);
    left: var(--floating-inset);
    z-index: var(--z-floating);
    box-shadow: var(--shadow-xs);
  }

  .lumia-app-shell[data-sidebar-open] .lumia-sidebar__floating-toggle {
    display: none;
  }

  .lumia-section { padding: var(--spacing-500) 0; }
  .lumia-section__inner { padding-inline: var(--spacing-200); }
}

@media (min-width: 768px) {
  .lumia-sidebar__floating-toggle,
  .lumia-sidebar__toggle {
    display: none;
  }
}