/* ==========================================================================
   layout.css — the application shell
   Sidebar (fixed) · Topbar (sticky) · Main content · Page grids
   ========================================================================== */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
  transition: grid-template-columns var(--duration-base) var(--ease);
}

.app[data-sidebar="collapsed"] {
  grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr);
}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--surface-nav);
  border-right: 1px solid var(--nav-border);
  z-index: 30;
  /* visible so the account menu can escape a collapsed sidebar; the nav
     list does its own clipping */
  overflow: visible;
}

.sidebar__brand {
  height: var(--topbar-height);
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--nav-border);
  flex-shrink: 0;
  color: var(--nav-ink-strong);
}

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-4) var(--space-3);
}

.nav-group + .nav-group { margin-top: var(--space-6); }

.nav-group__label {
  padding: 0 var(--space-3) var(--space-2);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--nav-ink-muted);
  white-space: nowrap;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--nav-ink);
  font-size: var(--text-md);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--duration-fast) var(--ease),
              color var(--duration-fast) var(--ease);
}

.nav-item + .nav-item { margin-top: 2px; }
.nav-item:hover { background: var(--nav-item-hover); color: var(--nav-ink-strong); }

.nav-item[aria-current="page"] {
  background: var(--nav-item-active);
  color: var(--nav-ink-strong);
  font-weight: 500;
}

/* The active marker is a rail on the left edge, not a heavy fill */
.nav-item[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--white);
}

.nav-item__icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.9;
}

.nav-item__label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }

.nav-item__count {
  flex-shrink: 0;
  padding: 1px var(--space-2);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.12);
  font-size: var(--text-2xs);
  font-variant-numeric: tabular-nums;
  color: var(--nav-ink-strong);
}

.sidebar__footer {
  flex-shrink: 0;
  padding: var(--space-3);
  border-top: 1px solid var(--nav-border);
}

/* The account menu opens upward, out of the footer. */
.sidebar__footer .menu {
  top: auto;
  bottom: 100%;
  left: 0;
  right: 0;
  margin-bottom: var(--space-2);
}

.app[data-sidebar="collapsed"] .sidebar__footer .menu {
  left: calc(100% + var(--space-2));
  right: auto;
  bottom: var(--space-2);
  margin-bottom: 0;
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--nav-ink);
  cursor: pointer;
  text-align: left;
  transition: background var(--duration-fast) var(--ease);
}

.sidebar__user:hover { background: var(--nav-item-hover); }

.sidebar__user-meta { min-width: 0; line-height: var(--leading-snug); }
.sidebar__user-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--nav-ink-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar__user-org {
  font-size: var(--text-2xs);
  color: var(--nav-ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Collapsed state — icons only */
.app[data-sidebar="collapsed"] .brand__text,
.app[data-sidebar="collapsed"] .nav-item__label,
.app[data-sidebar="collapsed"] .nav-item__count,
.app[data-sidebar="collapsed"] .nav-group__label,
.app[data-sidebar="collapsed"] .sidebar__user-meta {
  display: none;
}

.app[data-sidebar="collapsed"] .sidebar__brand,
.app[data-sidebar="collapsed"] .nav-item,
.app[data-sidebar="collapsed"] .sidebar__user {
  justify-content: center;
  padding-left: var(--space-2);
  padding-right: var(--space-2);
}

.app[data-sidebar="collapsed"] .nav-group + .nav-group {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--nav-border);
}

/* --------------------------------------------------------------------------
   Main column
   -------------------------------------------------------------------------- */

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--topbar-height);
  padding: 0 var(--space-6);
  background: color-mix(in srgb, var(--surface-raised) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.topbar__spacer { flex: 1; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
  min-width: 0;
}

.breadcrumb__sep { color: var(--text-faint); }
.breadcrumb__current { color: var(--text-primary); font-weight: 500; }

.page {
  flex: 1;
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: var(--space-6) var(--space-6) var(--space-9);
}

/* A view with a single centred thing on it — the employee dashboard. */
.page--center {
  display: grid;
  place-items: center;
  min-height: calc(100vh - var(--topbar-height));
  padding-block: var(--space-6);
}

.page__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.page__title { font-size: var(--text-xl); }

.page__subtitle {
  margin-top: var(--space-1);
  font-size: var(--text-md);
  color: var(--text-secondary);
  max-width: 62ch;
}

.page__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  /* Does not shrink — buttons squeezed to nothing are worse than a second row
     — but it does wrap, and max-width keeps it inside the header instead of
     pushing the whole page sideways once there are three of them. */
  flex-shrink: 0;
  flex-wrap: wrap;
  max-width: 100%;
}

/* --------------------------------------------------------------------------
   Grids — the content skeleton
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid--stats  { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--halves { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }

.grid--main {
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  align-items: start;
}

.stack { display: grid; gap: var(--space-4); }
.section + .section { margin-top: var(--space-6); }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1100px) {
  .grid--main { grid-template-columns: minmax(0, 1fr); }
  /* The topbar runs out of room before the page does — the breadcrumb is
     the first thing that can go, since the nav already says where you are. */
  .topbar .breadcrumb { display: none; }
}

@media (max-width: 900px) {
  .app,
  .app[data-sidebar="collapsed"] { grid-template-columns: minmax(0, 1fr); }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-width);
    transform: translateX(-100%);
    transition: transform var(--duration-base) var(--ease);
    box-shadow: var(--shadow-lg);
  }

  .app[data-mobile-nav="open"] .sidebar { transform: translateX(0); }

  .app[data-sidebar="collapsed"] .brand__text,
  .app[data-sidebar="collapsed"] .nav-item__label,
  .app[data-sidebar="collapsed"] .nav-item__count,
  .app[data-sidebar="collapsed"] .nav-group__label,
  .app[data-sidebar="collapsed"] .sidebar__user-meta { display: revert; }

  .app[data-sidebar="collapsed"] .sidebar__brand,
  .app[data-sidebar="collapsed"] .nav-item,
  .app[data-sidebar="collapsed"] .sidebar__user {
    justify-content: flex-start;
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  .scrim {
    position: fixed;
    inset: 0;
    z-index: 25;
    background: var(--scrim);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-base) var(--ease);
  }

  .app[data-mobile-nav="open"] .scrim { opacity: 1; pointer-events: auto; }

  .page { padding: var(--space-4) var(--space-4) var(--space-8); }
  .topbar { padding: 0 var(--space-4); }
}

@media (max-width: 640px) {
  /* The breadcrumb and the desktop collapse control both lose to the
     search field for space on a phone. */
  .topbar .breadcrumb,
  .topbar [data-action="toggle-sidebar"] { display: none; }
  .search--topbar { width: auto; flex: 1; min-width: 0; }
  .page__header { flex-direction: column; align-items: stretch; }
}

@media (min-width: 901px) {
  .app .scrim,
  .topbar .topbar__mobile-toggle { display: none; }
}