/* ============================================
   Birkly Admin — Shell + sidebar (Birch v5)
   ============================================

   Floating panels on the canvas: main, plugins, system. Rows are full width
   and square; the current page gets a 2px ink bar on the left, hover
   previews it in grey and nudges the label by 2px. The brand square sits on
   the nav-icon centre line; the brand area and the top bar share one height,
   so the top bar's rule meets the top of the first nav panel.

   Widths: 216px sidebar (>= 1280), 52px rail when collapsed by hand,
   64px rail at 1024–1279, drawer below 1024.

   Hooks kept for JS and templates: .sidebar, .sidebar-body, .sidebar-header,
   .sidebar-nav, .nav-links, .nav-item, .nav-link, .nav-icon, .nav-label,
   .nav-section, .sidebar-footer, .sidebar-collapse-toggle, .sidebar-backdrop,
   #links-main, #links-plugins, #links-settings, body.sidebar-collapsed,
   body.sidebar-rail-auto, .sidebar.open.
   ============================================ */

.admin-layout {
  display: flex;
  flex-direction: row;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  overflow-y: visible;
  background: var(--bg);
}

/* Stays in view so collapse and the program label are pinned to the bottom */
.sidebar {
  --nav-pad: var(--s-3);
  --panel-width: calc(var(--sidebar-width) - var(--gutter));
  position: sticky;
  inset-block-start: 0;
  display: flex;
  flex-direction: column;
  width: var(--sidebar-width);
  height: 100vh;
  overflow-y: auto;
  scrollbar-width: none;
  align-self: flex-start;
  flex-shrink: 0;
  padding: var(--gutter) 0 var(--s-4) var(--gutter);
  background: var(--bg-side);
  transition: width var(--dur-3) var(--ease);
}

.sidebar-body {
  flex: 1 1 auto;
  min-width: 0;
  width: var(--panel-width);
  display: flex;
  flex-direction: column;
  transition: width var(--dur-3) var(--ease);
}

/* ============================================
   Brand — same height as the top bar
   ============================================ */
#admin-sidebar .sidebar-header {
  display: flex;
  align-items: center;
  height: calc(var(--chrome-row) + var(--s-4));
  margin: 0;
  padding: 0;
  color: var(--text);
}

#admin-sidebar .sidebar-header .logo,
#admin-sidebar .sidebar-header .branding-logo {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  width: 100%;
  min-width: 0;
  /* Square centre sits within half a pixel of the 13px icon centre */
  padding-inline-start: calc(var(--nav-pad) - 7px);
}

#admin-sidebar .sidebar-header .logo-mark {
  display: block;
  flex: 0 0 var(--nav-row);
  width: var(--nav-row);
  height: var(--nav-row);
  border-radius: var(--r);
  background: var(--text);
  overflow: hidden;
}

#admin-sidebar .sidebar-header .logo-mark .logo-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#admin-sidebar .sidebar-header .logo-name {
  min-width: 0;
  color: var(--text);
  font-size: var(--size-title);
  line-height: var(--lh-title);
  font-weight: var(--weight-semibold);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: opacity var(--dur-3) var(--ease);
}

/* ============================================
   Panels
   ============================================ */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  min-width: 0;
}

.nav-section { margin: 0; }

.nav-links {
  list-style: none;
  margin: 0;
  padding: var(--s-1) 0;
  min-width: 0;
  overflow: hidden;
}

.nav-item { position: relative; }

.nav-links a,
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--s-3);
  height: var(--nav-row);
  padding-inline: var(--nav-pad);
  border: 0;
  border-radius: 0;
  background: none;
  color: var(--text-2);
  font-family: inherit;
  font-size: var(--size-body);
  line-height: var(--lh-body);
  font-weight: var(--weight-regular);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--dur-1) var(--ease);
}

.nav-links a .nav-icon,
.nav-link .nav-icon {
  flex-shrink: 0;
  color: inherit;
}

/* A plugin's own inline svg sits in the same 13 px box as the Birch icons */
.nav-link > svg:not(.birkly-icon) {
  flex-shrink: 0;
  width: var(--icon);
  height: var(--icon);
}

.nav-links a .nav-label,
.nav-link .nav-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: transform var(--dur-1) var(--ease), opacity var(--dur-3) var(--ease);
}

/* Ink bar: hover previews it in grey, the current page shows it in ink */
.nav-links a::before,
.nav-link::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block: 0;
  width: 2px;
  border-radius: var(--r-pixel);
  background: transparent;
  transition: background-color var(--dur-1) var(--ease);
}

.nav-links a:hover,
.nav-link:hover { color: var(--text); }

.nav-links a:hover::before,
.nav-link:hover::before { background: var(--line-strong); }

.nav-links a:hover .nav-label,
.nav-link:hover .nav-label { transform: translateX(2px); }

.nav-links a.active,
.nav-links li.active > a {
  color: var(--text);
  font-weight: var(--weight-medium);
}

.nav-links a.active::before,
.nav-links li.active > a::before { background: var(--text); }

.nav-links a:focus-visible,
.nav-link:focus-visible {
  outline: var(--focus-outline);
  outline-offset: -2px;
}

/* Plugin activity: a 6px blue square (title and aria-label carry the text) */
.nav-links a .nav-attention-dot,
.nav-link .nav-attention-dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-inline-start: auto;
  border-radius: var(--r-pixel);
  background: var(--accent);
}

/* The flyout trigger is only for the rail; the plugin list shows inline */
#links-plugins-rail { display: none; }

/* ============================================
   Bottom: collapse, version, program
   ============================================ */
.sidebar-collapse-toggle {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  width: 100%;
  height: var(--nav-row);
  margin-block-start: auto;
  padding-inline: var(--nav-pad);
  border: 0;
  border-radius: var(--r);
  background: none;
  color: var(--text-3);
  font-family: inherit;
  font-size: var(--size-small);
  line-height: var(--lh-small);
  cursor: pointer;
  transition: color var(--dur-1) var(--ease);
}

.sidebar-collapse-toggle:hover { color: var(--text); }

.sidebar-collapse-toggle:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

.sidebar-collapse-toggle svg {
  flex-shrink: 0;
  transition: transform var(--dur-3) var(--ease);
}

body.sidebar-collapsed .sidebar-collapse-toggle svg { transform: scaleX(-1); }

.sidebar-footer {
  flex-shrink: 0;
  width: var(--panel-width);
  padding: var(--s-1) var(--nav-pad) 0;
  transition: width var(--dur-3) var(--ease);
}

.sidebar-program-label {
  margin: 0;
  color: var(--text-3);
  font-size: var(--size-caption);
  line-height: var(--lh-caption);
  white-space: nowrap;
}

.sidebar-program-label-full {
  display: inline-block;
  vertical-align: top;
  transition: opacity var(--dur-3) var(--ease);
}

.sidebar-program-label-short { display: none; }

/* ============================================
   Rails: collapsed by hand (52px) and automatic at 1024–1279 (64px)
   ============================================ */
/* Icons sit on whole pixels: 19px in the 52px rail, 25px in the 64px rail */
body.sidebar-collapsed .sidebar { --panel-width: var(--sidebar-rail); --nav-pad: 19px; }
body.sidebar-rail-auto .sidebar { --panel-width: var(--sidebar-rail-auto); --nav-pad: 25px; }

body.sidebar-collapsed .sidebar,
body.sidebar-rail-auto .sidebar {
  width: calc(var(--gutter) + var(--panel-width));
}

body.sidebar-collapsed #admin-sidebar .sidebar-header .logo,
body.sidebar-rail-auto #admin-sidebar .sidebar-header .logo {
  padding-inline-start: calc((var(--panel-width) - var(--nav-row)) / 2);
}

body.sidebar-collapsed #admin-sidebar .sidebar-header .logo-name,
body.sidebar-rail-auto #admin-sidebar .sidebar-header .logo-name,
body.sidebar-collapsed .nav-links a .nav-label,
body.sidebar-rail-auto .nav-links a .nav-label,
body.sidebar-collapsed .sidebar-collapse-label,
body.sidebar-collapsed .sidebar-program-label-full,
body.sidebar-rail-auto .sidebar-program-label-full {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

body.sidebar-collapsed .nav-links a,
body.sidebar-rail-auto .nav-links a { gap: 0; }

body.sidebar-collapsed .nav-links a .nav-attention-dot,
body.sidebar-rail-auto .nav-links a .nav-attention-dot {
  position: absolute;
  inset-block-start: var(--s-1);
  inset-inline-end: var(--s-2);
  margin: 0;
}

body.sidebar-collapsed .sidebar-program-label-short,
body.sidebar-rail-auto .sidebar-program-label-short { display: inline; }

body.sidebar-collapsed .sidebar-footer,
body.sidebar-rail-auto .sidebar-footer {
  padding-inline: 0;
  text-align: center;
}

body.sidebar-collapsed .sidebar-collapse-toggle { gap: 0; }

/* Rail tooltips: an ink float beside the rail */
.sidebar-rail-tooltip {
  position: fixed;
  z-index: var(--z-tooltip);
  padding: var(--s-1) var(--s-2);
  border-radius: var(--r);
  background: var(--ink-float);
  box-shadow: var(--shadow-float-2);
  color: var(--on-ink-float);
  font-size: var(--size-small);
  line-height: var(--lh-small);
  white-space: nowrap;
  pointer-events: none;
  transform: translateY(-50%);
}

.nav-plugins-flyout {
  position: fixed;
  z-index: var(--z-popover);
  min-width: 12rem;
  padding: var(--s-1);
  border-radius: var(--r);
  background: var(--surface);
  box-shadow: var(--shadow-menu);
}

.nav-plugins-flyout-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 1024px) and (max-width: 1279px) {
  .sidebar-collapse-toggle { display: none; }
}

/* ============================================
   Drawer below 1024
   ============================================ */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-backdrop);
  background: var(--scrim);
}

.sidebar-backdrop.visible { display: block; }

body.sidebar-open { overflow: hidden; }

@media (max-width: 1023px) {
  .sidebar-collapse-toggle { display: none; }

  .sidebar {
    position: fixed;
    inset-block-start: 0;
    inset-inline-start: 0;
    z-index: var(--z-drawer);
    height: 100vh;
    max-height: 100vh;
    overflow-y: auto;
    padding-inline-end: var(--gutter);
    width: calc(var(--sidebar-width) + var(--gutter));
    background: var(--bg);
    box-shadow: var(--shadow-sheet);
    transform: translateX(-100%);
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--dur-3) var(--ease), visibility 0s linear var(--dur-3);
  }

  .sidebar.open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform var(--dur-3) var(--ease);
  }
}

/* ============================================
   Phone drawer: search, theme and account move here from the top bar
   ============================================ */
.drawer-search,
.drawer-tools { display: none; }

@media (max-width: 767px) {
  .drawer-search {
    display: flex;
    align-items: center;
    gap: var(--s-2);
    width: var(--panel-width);
    height: var(--control);
    margin: 0 0 var(--s-2);
    padding: 0 var(--s-3);
    border: 0;
    border-radius: var(--r);
    background: var(--surface);
    color: var(--text-3);
    font: var(--weight-regular) var(--size-body) / var(--lh-body) var(--font-sans);
    text-align: start;
    cursor: pointer;
  }

  .drawer-search:hover { color: var(--text-2); }

  .drawer-tools {
    display: flex;
    flex-direction: column;
    gap: var(--s-2);
    width: var(--panel-width);
    margin-block-start: var(--s-4);
  }

  .drawer-theme { display: flex; }
  .drawer-theme > button { flex: 1 1 0; justify-content: center; height: var(--control-xs); }

  .drawer-account { display: flex; flex-direction: column; padding: var(--s-1) 0; }

  .drawer-account-link,
  .drawer-logout {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    min-height: var(--nav-row);
    padding: var(--s-1) var(--nav-pad);
    border: 0;
    background: none;
    color: var(--text-2);
    font: var(--weight-regular) var(--size-body) / var(--lh-body) var(--font-sans);
    text-align: start;
    text-decoration: none;
    cursor: pointer;
  }

  .drawer-account-link:hover,
  .drawer-logout:hover { color: var(--text); }

  .drawer-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 var(--nav-row);
    width: var(--nav-row);
    height: var(--nav-row);
    border-radius: var(--r);
    object-fit: cover;
    font-size: var(--size-caption);
  }

  .drawer-account-text { display: flex; flex-direction: column; min-width: 0; }
  .drawer-account-name { color: var(--text); font-weight: var(--weight-medium); }
  .drawer-account-name,
  .drawer-account-email { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .drawer-account-email { color: var(--text-3); font-size: var(--size-small); line-height: var(--lh-small); }
  .drawer-logout { color: var(--danger); }
  .drawer-logout:hover { color: var(--danger); }
}

@media (max-width: 639px) {
  .admin-layout { --gutter: var(--s-4); }
}