/* Pico layout (Werkbank direction, PICO-141).
   Ported from the step 2 prototype (werkbank/layout.css): left rail (240px, collapsible),
   sticky project chrome at the top of the content, fluid content up to 1440px, split-view schema
   editor, sign-in page. Used by layouts/pico.cfm only; legacy screens keep layouts/main.cfm.
   Sticker id: css-pico-layout (depends on css-pico-components). */

@layer pico.layout {

  /* ---------- Environment banner (PICO_ENV_BANNER). Absent from the markup when unset. ---------- */
  .pico-env-banner {
    position: sticky;
    top: 0;
    z-index: var(--pico-z-sticky);
    margin: 0;
    padding: var(--pico-space-2) var(--pico-gutter);
    background: var(--pico-color-warning-bg);
    color: var(--pico-color-text);
    border-bottom: 1px solid var(--pico-color-warning-border);
    font-size: var(--pico-text-sm);
    font-weight: var(--pico-weight-semibold);
    line-height: var(--pico-leading-snug);
    text-align: center;
    overflow-wrap: anywhere;
  }

  /* ---------- App shell ---------- */
  .pico-app { display: grid; grid-template-columns: var(--pico-rail-width) minmax(0, 1fr); min-height: 100vh; min-height: 100dvh; }
  :root[data-rail="collapsed"] .pico-app { grid-template-columns: var(--pico-rail-width-collapsed) minmax(0, 1fr); }
  .pico-main { display: flex; flex-direction: column; min-width: 0; min-height: 100vh; min-height: 100dvh; }

  /* ---------- Rail ---------- */
  .pico-rail {
    position: sticky;
    top: 0;
    z-index: calc(var(--pico-z-sticky) + 1);
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    padding: var(--pico-space-3) var(--pico-space-2);
    border-right: 1px solid var(--pico-color-border);
    background: var(--pico-color-bg-subtle);
  }
  .pico-rail__brand { display: flex; align-items: center; justify-content: space-between; gap: var(--pico-space-2); height: 2.25rem; margin-bottom: var(--pico-space-3); padding: 0 0 0 var(--pico-space-2); }
  .pico-rail__brand .pico-mark { min-width: 0; border-radius: var(--pico-radius-md); }
  /* One shrinkable column: long project names truncate instead of widening the rail. */
  .pico-rail__nav { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1px; }
  .pico-rail__nav > li { min-width: 0; }
  .pico-rail__item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    height: 2rem;
    padding: 0 var(--pico-space-2);
    border: 1px solid transparent;
    border-radius: var(--pico-radius-md);
    background: transparent;
    color: var(--pico-color-text-muted);
    font-size: var(--pico-text-base);
    font-weight: var(--pico-weight-medium);
    text-align: left;
    text-decoration: none;
    white-space: nowrap;
  }
  .pico-rail__item:hover { background: var(--pico-color-bg-muted); color: var(--pico-color-text); text-decoration: none; }
  .pico-rail__item > .pico-icon { color: var(--pico-color-text-subtle); }
  .pico-rail__item[aria-current="page"] { border-color: var(--pico-color-border); background: var(--pico-color-surface); color: var(--pico-color-text); box-shadow: var(--pico-shadow-xs); }
  .pico-rail__item[aria-current="page"] > .pico-icon { color: var(--pico-color-accent-text); }
  .pico-rail__item > .pico-dot { margin: 0 0.25rem; }
  .pico-rail__item .pico-kbd { margin-left: auto; }
  .pico-rail__text { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .pico-rail__count { margin-left: auto; color: var(--pico-color-text-subtle); font-size: var(--pico-text-xs); font-variant-numeric: tabular-nums; }
  .pico-rail__section { margin-top: var(--pico-space-5); }
  .pico-rail__label { padding: 0 var(--pico-space-2) var(--pico-space-1); color: var(--pico-color-text-subtle); font-size: var(--pico-text-xs); font-weight: var(--pico-weight-medium); }
  .pico-rail__footer { display: grid; gap: 2px; margin-top: auto; padding-top: var(--pico-space-3); border-top: 1px solid var(--pico-color-border); }
  .pico-rail__account { display: block; width: 100%; }
  .pico-rail__account > summary { height: 2.75rem; }
  .pico-rail__account > summary > .pico-icon { margin-left: auto; }
  .pico-rail__who { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
  .pico-rail__who strong { color: var(--pico-color-text); font-weight: var(--pico-weight-medium); overflow: hidden; text-overflow: ellipsis; }
  .pico-rail__who span { color: var(--pico-color-text-subtle); font-size: var(--pico-text-xs); font-weight: var(--pico-weight-regular); overflow: hidden; text-overflow: ellipsis; }
  .pico-rail__account .pico-menu__panel { width: 15.5rem; }
  .pico-rail__account .pico-segmented { margin: 0 var(--pico-space-2) var(--pico-space-1); }

  :root[data-rail="collapsed"] .pico-rail { padding-left: var(--pico-space-2); padding-right: var(--pico-space-2); }
  :root[data-rail="collapsed"] .pico-rail__brand { flex-direction: column; height: auto; gap: var(--pico-space-2); padding: 0; }
  :root[data-rail="collapsed"] .pico-rail__text,
  :root[data-rail="collapsed"] .pico-rail__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  :root[data-rail="collapsed"] .pico-rail__item { justify-content: center; padding: 0; }
  :root[data-rail="collapsed"] .pico-rail__item > .pico-kbd,
  :root[data-rail="collapsed"] .pico-rail__account > summary > .pico-icon { display: none; }
  :root[data-rail="collapsed"] .pico-rail__collapse .pico-icon { transform: scaleX(-1); }
  :root[data-rail="collapsed"] .pico-rail__section { margin-top: var(--pico-space-4); padding-top: var(--pico-space-3); border-top: 1px solid var(--pico-color-border); }

  /* ---------- Project chrome ---------- */
  .pico-chrome {
    position: sticky;
    top: 0;
    z-index: var(--pico-z-sticky);
    background: color-mix(in srgb, var(--pico-color-bg) 90%, transparent);
    -webkit-backdrop-filter: saturate(1.5) blur(12px);
    backdrop-filter: saturate(1.5) blur(12px);
  }
  .pico-chrome__inner { padding: var(--pico-space-4) var(--pico-gutter) 0; border-bottom: 1px solid var(--pico-color-border); }
  /* Two blocks: the heading (crumb, title, state, tags) takes the free space and may shrink;
     the actions keep their size, stay right-aligned and wrap below the heading when space runs out. */
  .pico-chrome__head { display: flex; flex-wrap: wrap; align-items: flex-start; gap: var(--pico-space-2) var(--pico-space-4); max-width: calc(var(--pico-content-max) - 2 * var(--pico-gutter)); }
  .pico-chrome__heading { display: flex; flex-wrap: wrap; align-items: center; gap: var(--pico-space-2) var(--pico-space-3); flex: 1 1 20rem; min-width: 0; min-height: var(--pico-control-height); }
  .pico-chrome__titlewrap { display: flex; align-items: baseline; gap: var(--pico-space-2); min-width: 0; }
  .pico-chrome__crumb { flex: none; color: var(--pico-color-text-muted); font-size: var(--pico-text-base); font-weight: var(--pico-weight-medium); white-space: nowrap; text-decoration: none; border-radius: var(--pico-radius-sm); }
  .pico-chrome__crumb:hover { color: var(--pico-color-text); text-decoration: underline; }
  .pico-chrome__sep { flex: none; color: var(--pico-color-border-strong); }
  .pico-chrome__tags { display: inline-flex; align-items: center; gap: var(--pico-space-1); }
  /* At most two lines, then an ellipsis; the full name is in the title attribute. One line once the chrome is compact. */
  .pico-chrome__title {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    min-width: 0;
    overflow: hidden;
    overflow-wrap: anywhere;
    font-size: var(--pico-text-xl);
  }
  .pico-chrome__actions { display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center; gap: var(--pico-space-2); flex: none; max-width: 100%; margin-left: auto; }
  .pico-chrome__meta { margin-top: var(--pico-space-2); min-width: 0; max-width: 100%; }
  .pico-chrome__tabs { margin: var(--pico-space-2) 0 -1px calc(-1 * var(--pico-space-3)); }
  .pico-chrome.is-compact .pico-chrome__inner { padding-top: var(--pico-space-2); }
  .pico-chrome.is-compact .pico-chrome__meta { display: none; }
  .pico-chrome.is-compact .pico-chrome__title { -webkit-line-clamp: 1; line-clamp: 1; }
  .pico-chrome.is-compact .pico-chrome__tabs { margin-top: var(--pico-space-1); }
  .pico-chrome__banners:empty { display: none; }

  /* ---------- Content ---------- */
  .pico-content { flex: 1; width: 100%; max-width: var(--pico-content-max); padding: var(--pico-space-5) var(--pico-gutter) var(--pico-space-7); }
  .pico-content > .pico-flash-region { margin-bottom: var(--pico-space-4); }
  .pico-content--narrow { max-width: calc(var(--pico-form-max) + 2 * var(--pico-gutter) + 12rem); }
  .pico-page-crumbs { margin-bottom: var(--pico-space-2); }
  .pico-content__subhead { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--pico-space-3); margin-bottom: var(--pico-space-4); }

  .pico-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--pico-space-2) var(--pico-space-4); max-width: var(--pico-content-max); padding: var(--pico-space-4) var(--pico-gutter); border-top: 1px solid var(--pico-color-border-subtle); color: var(--pico-color-text-subtle); font-size: var(--pico-text-sm); }
  .pico-footer__end { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: var(--pico-space-2) var(--pico-space-4); margin-left: auto; }
  .pico-footer__links { display: flex; gap: var(--pico-space-4); }
  .pico-footer a { color: var(--pico-color-text-muted); text-decoration: none; }
  .pico-footer a:hover { color: var(--pico-color-text); text-decoration: underline; }
  .pico-footer__trust { display: inline-flex; align-items: flex-start; gap: var(--pico-space-1); max-width: 100%; }
  .pico-footer__trust span { min-width: 0; }

  /* Language switch (DE/EN): links to the same page in the other language. */
  .pico-lang { display: inline-flex; align-items: center; gap: 2px; padding: 2px; border: 1px solid var(--pico-color-border); border-radius: var(--pico-radius-pill); background: var(--pico-color-surface); font-size: var(--pico-text-xs); font-weight: var(--pico-weight-medium); line-height: 1; }
  .pico-footer .pico-lang__item, .pico-lang__item { padding: 0.25rem 0.5rem; border-radius: var(--pico-radius-pill); color: var(--pico-color-text-muted); letter-spacing: 0.04em; text-decoration: none; }
  .pico-footer .pico-lang__item:hover, .pico-lang__item:hover { color: var(--pico-color-text); text-decoration: none; background: var(--pico-color-bg-muted); }
  .pico-footer .pico-lang__item[aria-current="true"], .pico-lang__item[aria-current="true"] { background: var(--pico-color-accent); color: var(--pico-color-accent-contrast); }

  /* ---------- Grids ---------- */
  .pico-grid { display: grid; gap: var(--pico-space-4); }
  .pico-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .pico-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pico-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pico-columns { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(19rem, 1fr); gap: var(--pico-space-5); align-items: start; }
  /* One shrinkable column: long names inside a stack clamp instead of widening the page. */
  .pico-stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--pico-space-5); align-content: start; min-width: 0; }
  .pico-stack--sm { gap: var(--pico-space-3); }

  /* ---------- Split view (schema editor) ---------- */
  .pico-split { display: grid; grid-template-columns: var(--pico-split-list-width) minmax(0, 1fr); align-items: stretch; min-height: calc(100vh - var(--pico-chrome-height, 10rem) - 5rem); border: 1px solid var(--pico-color-border); border-radius: var(--pico-radius-lg); background: var(--pico-color-surface); }
  .pico-split__list { min-width: 0; border-right: 1px solid var(--pico-color-border); border-radius: var(--pico-radius-lg) 0 0 var(--pico-radius-lg); background: var(--pico-color-bg-subtle); }
  .pico-split__sticky { position: sticky; top: var(--pico-chrome-height, 10rem); max-height: calc(100vh - var(--pico-chrome-height, 10rem)); overflow-y: auto; padding: var(--pico-space-2); }
  .pico-split__detail { min-width: 0; padding: var(--pico-space-5) var(--pico-space-6) var(--pico-space-6); }
  .pico-pane { display: none; }
  .pico-pane > * + * { margin-top: var(--pico-space-6); }
  .pico-split:not(.is-js) .pico-pane:target { display: block; }
  .pico-split:not(.is-js) .pico-split__detail:not(:has(.pico-pane:target)) > .pico-pane--default { display: block; }
  .pico-split.is-js .pico-pane.is-active { display: block; }

  .pico-navlist__group + .pico-navlist__group { margin-top: var(--pico-space-4); }
  .pico-navlist__head { display: flex; align-items: center; justify-content: space-between; gap: var(--pico-space-2); padding: var(--pico-space-1) var(--pico-space-1) var(--pico-space-1) var(--pico-space-2); color: var(--pico-color-text-subtle); font-size: var(--pico-text-xs); font-weight: var(--pico-weight-medium); }
  .pico-navlist__items { display: grid; gap: 1px; }
  .pico-navlist__item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--pico-space-2);
    min-height: 2.5rem;
    padding: var(--pico-space-1) var(--pico-space-2);
    border-radius: var(--pico-radius-md);
    color: var(--pico-color-text);
    text-decoration: none;
  }
  .pico-navlist__item:hover { background: var(--pico-color-bg-muted); text-decoration: none; }
  .pico-navlist__item[aria-current="true"] { background: var(--pico-color-surface); box-shadow: 0 0 0 1px var(--pico-color-border), var(--pico-shadow-xs); }
  .pico-navlist__item[aria-current="true"] .pico-navlist__icon { color: var(--pico-color-accent-text); }
  .pico-navlist__icon { color: var(--pico-color-text-subtle); }
  .pico-navlist__label { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
  .pico-navlist__name { font-weight: var(--pico-weight-medium); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .pico-navlist__tech { color: var(--pico-color-text-subtle); font-family: var(--pico-font-mono); font-size: 0.6875rem; }
  .pico-navlist__meta { display: inline-flex; align-items: center; gap: var(--pico-space-1); color: var(--pico-color-text-subtle); font-size: var(--pico-text-xs); font-variant-numeric: tabular-nums; }

  .pico-page-header--sub { margin-bottom: var(--pico-space-4); align-items: flex-start; }
  .pico-page-header--sub .pico-page-header__title { display: flex; flex-wrap: wrap; align-items: center; gap: var(--pico-space-2); font-size: var(--pico-text-xl); }
  .pico-page-header--sub .pico-meta { margin-top: var(--pico-space-2); }
  .pico-page-header__tech { color: var(--pico-color-text-subtle); font-family: var(--pico-font-mono); font-size: var(--pico-text-sm); font-weight: var(--pico-weight-regular); letter-spacing: 0; overflow-wrap: anywhere; min-width: 0; }
  .pico-drawer__title { min-width: 0; overflow-wrap: anywhere; }

  /* ---------- Sign-in ---------- */
  .pico-auth {
    display: grid;
    grid-template-rows: 1fr auto;
    justify-items: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: var(--pico-space-6) var(--pico-space-4) var(--pico-space-4);
    background-color: var(--pico-color-bg-subtle);
    background-image: radial-gradient(var(--pico-color-border) 1px, transparent 1px);
    background-size: 20px 20px;
  }
  .pico-auth__main { align-self: center; width: min(100%, 24rem); }
  .pico-auth__main--wide { width: min(100%, 44rem); }
  .pico-auth__brand { display: flex; justify-content: center; margin-bottom: var(--pico-space-5); }
  .pico-auth__card { padding: var(--pico-space-6); border: 1px solid var(--pico-color-border); border-radius: var(--pico-radius-lg); background: var(--pico-color-surface); box-shadow: var(--pico-shadow-md); }
  .pico-auth__title { font-size: var(--pico-text-xl); }
  .pico-auth__lead { margin-top: var(--pico-space-1); color: var(--pico-color-text-muted); }
  .pico-auth__card .pico-form { gap: var(--pico-space-4); margin-top: var(--pico-space-5); }
  .pico-auth__card .pico-flash-region { margin-top: var(--pico-space-4); }
  .pico-auth__row { display: flex; align-items: center; justify-content: space-between; gap: var(--pico-space-2); }
  .pico-auth__row a { font-size: var(--pico-text-sm); }
  .pico-auth__note { margin-top: var(--pico-space-4); color: var(--pico-color-text-muted); font-size: var(--pico-text-sm); text-align: center; }
  .pico-auth .pico-footer { border: 0; padding-bottom: 0; width: 100%; max-width: none; }
  .pico-auth__card .pico-form__actions .pico-btn--block { flex: 1 1 100%; }

  /* ---------- Keyboard shortcuts ---------- */
  .pico-shortcuts__list { display: grid; gap: var(--pico-space-2); margin: 0; padding: 0; list-style: none; color: var(--pico-color-text); }
  .pico-shortcuts__row { display: flex; align-items: center; justify-content: space-between; gap: var(--pico-space-3); min-height: var(--pico-row-height); }
  .pico-shortcuts__keys { display: inline-flex; align-items: center; gap: var(--pico-space-1); flex: none; }
  .pico-keyhint {
    position: fixed;
    z-index: var(--pico-z-toast);
    left: 50%;
    bottom: var(--pico-space-4);
    transform: translateX(-50%);
    max-width: calc(100vw - 2rem);
    padding: var(--pico-space-1) var(--pico-space-3);
    border: 1px solid var(--pico-color-border);
    border-radius: var(--pico-radius-pill);
    background: var(--pico-color-surface);
    box-shadow: var(--pico-shadow-md);
    color: var(--pico-color-text-muted);
    font-size: var(--pico-text-sm);
  }

  /* ---------- Responsive ---------- */
  @media (max-width: 1279px) {
    .pico-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  }
  @media (max-width: 1100px) {
    .pico-columns { grid-template-columns: minmax(0, 1fr); }
  }
  /* Next to the 240px rail, list and detail no longer fit side by side (field tables need ~470px): stack them. */
  @media (max-width: 1140px) {
    .pico-split { grid-template-columns: minmax(0, 1fr); }
    .pico-split__list { border-right: 0; border-bottom: 1px solid var(--pico-color-border); border-radius: var(--pico-radius-lg) var(--pico-radius-lg) 0 0; }
    .pico-split__sticky { position: static; max-height: none; }
    .pico-split__detail { padding: var(--pico-space-4) var(--pico-space-5) var(--pico-space-5); }
  }
  @media (max-width: 800px) {
    :root { --pico-gutter: var(--pico-space-4); }
    .pico-app, :root[data-rail="collapsed"] .pico-app { grid-template-columns: minmax(0, 1fr); }
    .pico-rail { position: relative; flex-direction: row; align-items: center; gap: var(--pico-space-2); height: auto; padding: var(--pico-space-2) var(--pico-space-3); border-right: 0; border-bottom: 1px solid var(--pico-color-border); overflow: visible; }
    .pico-rail__brand { margin: 0; padding: 0; }
    .pico-rail__collapse, .pico-rail__section, .pico-rail__shortcuts { display: none; }
    .pico-rail__nav { display: flex; }
    .pico-rail__count { display: none; }
    .pico-rail__footer { margin: 0 0 0 auto; padding: 0; border: 0; }
    .pico-rail__account > summary { height: 2.25rem; }
    .pico-rail__account > summary .pico-rail__who, .pico-rail__account > summary > .pico-icon { display: none; }
    .pico-rail__account.pico-menu--up .pico-menu__panel { top: calc(100% + 4px); bottom: auto; left: auto; right: 0; }
    .pico-chrome { position: relative; }
    .pico-grid--4, .pico-grid--3, .pico-grid--2 { grid-template-columns: minmax(0, 1fr); }
    .pico-split__detail { padding: var(--pico-space-4); }
    .pico-page-header { align-items: flex-start; }
    .pico-form__row { grid-template-columns: minmax(0, 1fr); }
    .pico-search { flex: 1 1 100%; }
  }
}