/* App frame: sidebar + topbar + scrollable content. */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
  background:
    radial-gradient(1200px 600px at 110% -10%, rgba(34, 211, 238, 0.06), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(79, 140, 255, 0.06), transparent 60%),
    var(--bg);
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 14px 14px;
  background: linear-gradient(180deg, var(--bg-elev), var(--bg));
  border-right: 1px solid var(--border);
  min-height: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 4px 8px 16px;
}
.brand img {
  width: 34px;
  height: 34px;
}
.brand strong {
  display: block;
  font-size: 15px;
  letter-spacing: 0.2px;
}
.brand span {
  display: block;
  font-size: var(--fs-xs);
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 1.4px;
}
.side-nav {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-label {
  margin: 18px 10px 6px;
  font-size: var(--fs-xs);
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 1.2px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  transition: background 0.15s, color 0.15s;
}
.nav-item:hover {
  background: var(--surface-2);
  color: var(--text);
}
.nav-item.active,
.nav-item.current {
  background: var(--surface-2);
  color: var(--text);
}
.nav-item.active {
  box-shadow: inset 2px 0 0 var(--accent);
}
.nav-item .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--tone);
  box-shadow: 0 0 10px var(--tone);
  flex-shrink: 0;
}
.nav-item span {
  flex: 1;
}
.nav-item small {
  font-size: var(--fs-xs);
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.nav-sub {
  display: flex;
  flex-direction: column;
  margin: 4px 0 8px 18px;
  padding-left: 10px;
  border-left: 1px solid var(--border-strong);
  animation: fade-up 0.25s var(--ease);
}
.nav-subitem {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  border-radius: var(--radius-xs);
  color: var(--text-3);
  font-size: var(--fs-sm);
}
.nav-subitem:hover {
  color: var(--text);
}
.nav-subitem.active {
  color: var(--text);
  background: var(--accent-soft);
}
.nav-subitem.active .icon {
  color: var(--accent);
}
.side-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}
.side-user-name {
  flex: 1;
  min-width: 0;
}
.side-user-name strong {
  display: block;
  font-size: var(--fs-sm);
}
.side-user-name span {
  font-size: var(--fs-xs);
  color: var(--text-3);
}

/* Main column */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}
.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 9, 16, 0.6);
  backdrop-filter: blur(12px);
  flex-shrink: 0;
}
.menu-btn {
  display: none;
}
.crumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  font-size: var(--fs-sm);
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
}
.crumbs a:hover {
  color: var(--text);
}
.crumbs > span:last-child {
  color: var(--text);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
}
.crumb-sep {
  opacity: 0.5;
}
.spacer {
  flex: 1;
}
.search-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 260px;
  padding: 8px 10px 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-3);
  font-size: var(--fs-sm);
  transition: border-color 0.15s;
}
.search-trigger:hover {
  border-color: var(--border-strong);
  color: var(--text-2);
}
.search-trigger span {
  flex: 1;
  text-align: left;
}
kbd {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  color: var(--text-2);
}
.content {
  flex: 1;
  overflow-y: auto;
  padding: 28px;
}
.scrim {
  display: none;
}

/* Page scaffolding */
.page {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  animation: fade-up 0.35s var(--ease);
}
.grid {
  display: grid;
  gap: var(--gap);
}
.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.grid-2-1 {
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap);
}
.section-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 8px;
}
.section-title h2 {
  font-size: var(--fs-md);
  font-weight: 600;
}
.section-title span {
  font-size: var(--fs-sm);
}
.tab-body {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}
.toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 1180px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .grid-2-1 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-w);
    z-index: 40;
    transform: translateX(-100%);
    transition: transform 0.25s var(--ease);
  }
  .nav-open .sidebar {
    transform: none;
  }
  .nav-open .scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 30;
    background: var(--overlay);
  }
  .menu-btn {
    display: inline-grid;
  }
  .topbar {
    padding: 0 16px;
  }
  .search-trigger {
    min-width: 0;
  }
  .search-trigger span,
  .search-trigger kbd {
    display: none;
  }
  .content {
    padding: 18px 16px;
  }
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}