/* Admin sidebar: brand and toggle, search, grouped pages, account footer.
   Desktop: fixed column. Collapsed: icon rail. Tablets and phones: a top bar with the pages below it. */

.shell {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
  transition: grid-template-columns .2s ease;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 18px 14px;
  background: var(--side);
  color: var(--side-ink);
  overflow-y: auto;
  overflow-x: hidden;
}

/* Brand row with the collapse button beside it. */
.sidebar-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; color: #fff; text-decoration: none; }
.brand-mark { display: block; width: 32px; height: 32px; border-radius: 8px; flex: 0 0 auto; }
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-text strong { font-size: 15px; line-height: 1.2; white-space: nowrap; }
.brand-text small { font-size: 12px; color: var(--side-ink); }
.sidebar-toggle {
  width: 30px; height: 30px; flex: 0 0 30px; padding: 0;
  border: 1px solid #344967; border-radius: 8px; background: #1b2f4d; color: #fff;
  font-size: 20px; line-height: 1; cursor: pointer;
}
.sidebar-toggle:hover { background: #284568; }
.sidebar-toggle:focus-visible { outline: 2px solid #93c5fd; outline-offset: 2px; }

/* Search box at the top of the column. */
.sidebar-search input {
  width: 100%; padding: 10px 12px; border-radius: 8px;
  border: 1px solid #2c4262; background: #1b2f4d; color: #fff; font: inherit; font-size: 14px;
}
.sidebar-search input::placeholder { color: #8ea3bf; }
.sidebar-search input:focus { outline: 2px solid #93c5fd; border-color: transparent; }

/* Navigation: groups with small headings. */
.side-nav { display: flex; flex-direction: column; gap: 2px; }
.nav-group {
  margin: 14px 10px 4px; font-size: 11px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: #7f93b3;
}
.side-nav .nav-group:first-child { margin-top: 0; }
.side-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 12px; border-radius: 8px; color: var(--side-ink); text-decoration: none; font-size: 15px;
}
.side-nav a:hover { background: #1b2f4d; color: #fff; }
.side-nav a.active { background: var(--brand); color: #fff; font-weight: 600; }
.side-nav a:focus-visible { outline: 2px solid #93c5fd; outline-offset: 2px; }
.nav-icon {
  display: block; width: 20px; height: 20px; flex: 0 0 20px;
  fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}

/* Account footer, pinned to the bottom of the column. */
.side-account { margin-top: auto; padding-top: 14px; border-top: 1px solid #22395b; display: grid; gap: 10px; }
.account-card { display: flex; align-items: center; gap: 10px; min-width: 0; }
.avatar {
  width: 34px; height: 34px; flex: 0 0 34px; border-radius: 50%;
  display: grid; place-items: center; background: #31577f; color: #fff; font-size: 13px; font-weight: 700;
}
.account-text { display: flex; flex-direction: column; min-width: 0; }
.account-text strong { color: #fff; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-text small { font-size: 12px; text-transform: capitalize; color: #9fb1cc; }
.account-links { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 14px; }
.account-links a { color: var(--side-ink); }
.account-links a:hover { color: #fff; }
.account-links form { display: inline; margin: 0; }
.account-links button.link { color: var(--side-ink); font: inherit; font-size: 14px; padding: 0; cursor: pointer; }
.account-links button.link:hover { color: #fff; }
.account-links .nav-icon { display: none; }

/* Collapsed: a narrow icon rail. Hover or focus shows nothing extra; the title attribute names each page. */
.shell.sidebar-collapsed { grid-template-columns: 72px minmax(0, 1fr); }
.sidebar-collapsed .sidebar { padding: 18px 10px; align-items: center; }
.sidebar-collapsed .sidebar-top { flex-direction: column; gap: 12px; }
.sidebar-collapsed .brand-text,
.sidebar-collapsed .sidebar-search,
.sidebar-collapsed .nav-group,
.sidebar-collapsed .nav-label,
.sidebar-collapsed .account-text { display: none; }
.sidebar-collapsed .brand { justify-content: center; }
.sidebar-collapsed .side-nav { width: 100%; }
.sidebar-collapsed .side-nav a { justify-content: center; padding: 10px 0; }
.sidebar-collapsed .side-nav .nav-icon { width: 22px; height: 22px; flex-basis: 22px; }
.sidebar-collapsed .side-nav a.active { background: #31577f; }
.sidebar-collapsed .side-account { width: 100%; justify-items: center; }
.sidebar-collapsed .account-card { justify-content: center; }
.sidebar-collapsed .account-links { display: flex; justify-content: center; width: 100%; }
.sidebar-collapsed .account-links > a,
.sidebar-collapsed .account-links .btn-text { display: none; }
.sidebar-collapsed .account-links .nav-icon { display: block; }

/* Tablets and phones: the sidebar becomes a top bar with the pages in one scrolling row. */
@media (max-width: 900px) {
  .shell,
  .shell.sidebar-collapsed { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: relative; height: auto; overflow: visible;
    display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; padding: 12px 14px;
  }
  .sidebar-top { order: 1; }
  .sidebar-search { order: 2; }
  .side-nav {
    order: 3; flex-direction: row; gap: 4px;
    overflow-x: auto; padding-bottom: 4px; scrollbar-width: thin;
  }
  .side-nav .nav-group { display: none; }
  .side-nav a { flex: 0 0 auto; white-space: nowrap; padding: 8px 12px; }
  .side-account { order: 4; margin-top: 0; padding-top: 10px; grid-template-columns: auto minmax(0, 1fr); align-items: center; }
  .account-links { justify-content: flex-end; }
  /* Collapsed on a tablet or phone: only the top row stays. */
  .sidebar-collapsed .sidebar { padding: 12px 14px; align-items: stretch; }
  .sidebar-collapsed .sidebar-top { flex-direction: row; }
  .sidebar-collapsed .brand-text { display: flex; }
  .sidebar-collapsed .sidebar-search,
  .sidebar-collapsed .side-nav,
  .sidebar-collapsed .side-account { display: none; }
  .sidebar-collapsed .side-nav a { justify-content: flex-start; padding: 8px 12px; }
  .sidebar-collapsed .side-nav .nav-label { display: inline; }
  .sidebar-collapsed .sidebar-top { justify-content: space-between; }
}

@media (max-width: 640px) {
  .account-links { gap: 10px; font-size: 13px; }
  .sidebar-search input { font-size: 16px; }
}