.app { display: grid; grid-template-columns: 240px minmax(0, 1fr); min-height: 100vh; }
.app[data-mode="auth"] { display: block; }
.app[data-mode="auth"] .sidebar, .app[data-mode="auth"] .topbar, .app[data-mode="auth"] .scrim { display: none; }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto; background: var(--surface);
  border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 12px 10px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 6px 8px 14px; color: var(--text); font-weight: 650; font-size: 15px; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 26px; height: 26px; border-radius: 7px; background: var(--accent); color: var(--on-accent); display: grid; place-items: center; flex: none; }
.brand small { display: block; font-size: 11.5px; font-weight: 400; color: var(--text-3); line-height: 1.1; }
.nav-group { margin-top: 14px; }
.nav-title { padding: 4px 10px; font-size: 12px; font-weight: 600; color: var(--text-3); }
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px; margin: 1px 0; border-radius: var(--radius-sm);
  color: var(--text-2); font-weight: 500; transition: background var(--dur), color var(--dur);
}
.nav a:hover { background: var(--surface-3); color: var(--text); text-decoration: none; }
.nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent-text); }
.nav svg { flex: none; }
.site-head { padding: 4px 10px 10px; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
.site-head .name { font-weight: 650; font-size: 15px; overflow-wrap: anywhere; margin: 8px 0 6px; }
.sidebar-foot { margin-top: auto; padding: 10px; font-size: 12px; color: var(--text-3); }
.main-col { min-width: 0; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 20; height: 52px; display: flex; align-items: center; gap: 10px;
  padding: 0 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.crumbs { display: flex; align-items: center; gap: 6px; min-width: 0; flex: 1; font-size: 13px; color: var(--text-3); }
.crumbs a { color: var(--text-2); }
.crumbs li { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.crumbs ol { display: flex; align-items: center; gap: 6px; min-width: 0; overflow: hidden; margin: 0; padding: 0; list-style: none; }
.crumbs [aria-current] { color: var(--text); font-weight: 600; overflow: hidden; text-overflow: ellipsis; }
.search-btn {
  display: flex; align-items: center; gap: 8px; width: 260px; height: 32px; padding: 0 10px; background: var(--surface-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-3); cursor: pointer; transition: border-color var(--dur);
}
.search-btn:hover { border-color: var(--border-strong); }
.search-btn kbd { margin-left: auto; font: 11px var(--font); border: 1px solid var(--border); border-radius: 4px; padding: 0 5px; background: var(--surface); }
.topbar .nav-toggle { display: none; }
#main { padding: 24px 28px 64px; width: 100%; max-width: 1180px; margin: 0 auto; outline: none; }
.page { animation: fade-in 200ms ease-out; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head p { color: var(--text-2); margin-top: 4px; max-width: 70ch; }
.page-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.stack { display: grid; gap: 16px; }
.stack > * { min-width: 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.scrim { position: fixed; inset: 0; background: rgba(8, 12, 20, .5); z-index: 29; animation: fade-in var(--dur); }
@media (max-width: 899px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; z-index: 30; left: 0; top: 0; width: 280px; max-width: 86vw; transform: translateX(-102%);
    transition: transform 180ms ease; box-shadow: var(--shadow-2); visibility: hidden;
  }
  .app[data-nav="open"] .sidebar { transform: none; visibility: visible; }
  .topbar .nav-toggle { display: inline-flex; }
  .topbar { padding: 0 12px; }
  .search-btn { width: 36px; padding: 0; justify-content: center; }
  .search-btn span, .search-btn kbd { display: none; }
  #main { padding: 16px 16px 64px; }
  .grid-3, .grid-2 { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 899px) and (prefers-reduced-motion: reduce) { .sidebar { transition: none; } }
#main:focus-visible { box-shadow: none; }
@media (min-width: 900px) { .scrim { display: none !important; } }