/*
 * The app shell: fixed sidebar and the main column beside it.
 * The sidebar collapses to an icon rail when the user asks (.sidebar-collapsed on <body>, set by ux.js)
 * and always below 820px. PR 18 replaces the narrow rail with a drawer.
 */

.premium-shell {
  --sidebar-current: var(--sidebar-width);
  background: var(--surface-page);
  color: var(--text);
}

.sidebar-collapsed {
  --sidebar-current: var(--sidebar-width-collapsed);
}

.skip-link {
  position: fixed;
  top: -80px;
  left: var(--space-4);
  z-index: var(--z-skip-link);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--surface-inverse);
  color: var(--text-inverse);
}

.skip-link:focus {
  top: var(--space-3);
}

main {
  min-height: 100vh;
  margin-left: var(--sidebar-current);
  transition: margin var(--duration-base) var(--ease);
}

/* Sidebar */

.premium-side {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: var(--z-sidebar);
  display: flex;
  flex-direction: column;
  width: var(--sidebar-current);
  padding: var(--space-5) var(--space-4) var(--space-4);
  background: var(--surface-translucent);
  box-shadow: 1px 0 0 var(--border);
}

.side-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-0-5) var(--space-1) var(--space-4);
}

.premium-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text);
  text-decoration: none;
}

/* The brand mark: the app shell and the sign-in pages. */
.mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--accent), var(--accent-hover));
  box-shadow: var(--shadow-accent);
  color: var(--text-inverse);
  font-weight: var(--weight-bold);
}

.premium-brand .brand-copy {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-snug);
}

.premium-brand small {
  display: block;
  margin-top: var(--space-0-5);
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}

.side-collapse {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
}

.nav-scroll {
  overflow: auto;
  padding-right: var(--space-0-5);
}

.navgroup {
  margin: var(--space-2) 0 var(--space-5);
}

.navgroup > span {
  display: block;
  padding: 0 var(--space-3) var(--space-1-5);
  color: var(--text-faint);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
}

.premium-side nav a,
.side-footer > a,
.side-footer .signout {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-tertiary);
  text-decoration: none;
}

.premium-side nav a {
  min-height: 40px;
  margin: var(--space-0-5) 0;
  font-weight: var(--weight-semibold);
}

.premium-side nav a i,
.side-footer > a i,
.side-footer .signout i {
  width: 22px;
  color: var(--text-muted);
  font-size: var(--text-base);
  font-style: normal;
  text-align: center;
}

.premium-side nav a b,
.side-footer > a b,
.side-footer .signout b {
  font-weight: var(--weight-semibold);
}

.premium-side nav a:hover {
  background: var(--surface-page);
  color: var(--text);
}

.premium-side nav a.active,
.premium-side nav a.active i {
  color: var(--text-accent);
}

.premium-side nav a.active {
  background: var(--accent-soft);
}

.side-footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

.side-footer > a,
.side-footer .signout {
  color: var(--text-muted);
}

.side-footer form {
  margin: 0;
}

.side-footer .signout {
  width: 100%;
  border: 0;
  background: none;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.side-footer > a:hover,
.side-footer .signout:hover {
  background: var(--surface-sunken);
}

.org-switcher {
  margin-top: var(--space-2);
  padding: 0 var(--space-1);
}

.org-switcher label {
  margin: 0 0 var(--space-1);
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.org-switcher-row {
  display: flex;
  gap: var(--space-1-5);
}

.org-switcher select,
.org-switcher button {
  height: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font: inherit;
  font-size: var(--text-sm);
}

.org-switcher select {
  flex: 1;
  min-width: 0;
  padding: 0 var(--space-2);
  background: var(--surface);
  color: var(--text);
}

.org-switcher button {
  padding: 0 var(--space-3);
  background: var(--surface-subtle);
  color: var(--text-secondary);
  font-weight: var(--weight-semibold);
  cursor: pointer;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
}

.user-chip .avatar {
  width: 30px;
  height: 30px;
}

.user-chip b,
.user-chip small {
  display: block;
  font-size: var(--text-xs);
}

.user-chip small {
  margin-top: var(--space-0-5);
  color: var(--text-faint);
}

/*
 * Icon rail: wide screens, collapsed on request. Labels are hidden visually but stay readable by
 * screen readers (and show as tooltips), so every link keeps its name.
 */

@media (min-width: 821px) {
  .sidebar-collapsed .premium-side {
    padding-inline: var(--space-3);
  }

  .sidebar-collapsed .brand-copy,
  .sidebar-collapsed .navgroup > span,
  .sidebar-collapsed nav a b,
  .sidebar-collapsed .side-footer > a b,
  .sidebar-collapsed .side-footer .signout b,
  .sidebar-collapsed .user-chip > div {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .sidebar-collapsed .org-switcher {
    display: none;
  }

  .sidebar-collapsed .side-top {
    flex-wrap: wrap;
    justify-content: center;
  }

  .sidebar-collapsed .side-collapse {
    position: absolute;
    top: var(--space-6);
    left: 58px;
    width: 24px;
    height: 24px;
  }

  .sidebar-collapsed nav a,
  .sidebar-collapsed .side-footer > a,
  .sidebar-collapsed .side-footer .signout,
  .sidebar-collapsed .user-chip {
    justify-content: center;
    padding: var(--space-2);
  }

  .sidebar-collapsed nav a i,
  .sidebar-collapsed .side-footer > a i,
  .sidebar-collapsed .side-footer .signout i {
    width: auto;
  }

  .sidebar-collapsed .user-chip {
    background: transparent;
  }
}

/*
 * Narrow screens: the sidebar is a drawer, opened from the header's menu button (ux.js adds
 * .nav-open to <body>). Closed, it is hidden from keyboards and screen readers as well as the eye.
 */

.nav-backdrop {
  display: none;
}

@media (max-width: 820px) {
  .premium-shell,
  .sidebar-collapsed {
    --sidebar-current: 0px;
  }

  .premium-side {
    width: min(var(--sidebar-width), 85vw);
    z-index: var(--z-modal);
    visibility: hidden;
    transform: translateX(-100%);
    transition:
      transform var(--duration-base) var(--ease),
      visibility var(--duration-base) var(--ease);
  }

  .nav-open .premium-side {
    visibility: visible;
    transform: none;
    box-shadow: var(--shadow-lg);
  }

  .side-collapse {
    display: none;
  }

  .nav-open .nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: var(--z-overlay);
    display: block;
    background: var(--overlay);
  }

  .nav-open {
    overflow: hidden;
  }
}
