.app-shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  padding: 28px 18px;
  border-right: 1px solid var(--panel-border);
  background: rgba(15, 23, 42, 0.88);
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav a {
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
}

.nav a.active,
.nav a:hover {
  background: var(--primary-soft);
  color: #bfdbfe;
  text-decoration: none;
}

.main-content {
  padding: 28px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.page-header h1 {
  margin: 4px 0 8px;
  font-size: 32px;
}

.page-desc {
  margin: 0;
  color: var(--muted);
}

.eyebrow {
  margin: 0;
  color: #93c5fd;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.header-actions {
  display: flex;
  gap: 10px;
}

.content-grid {
  display: grid;
  gap: 20px;
  margin-bottom: 20px;
}

.content-grid.two-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-grid.top-align {
  align-items: start;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-grid.compact-stats {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--panel-border);
  }

  .main-content {
    padding: 20px;
  }

  .page-header,
  .content-grid.two-columns,
  .stat-grid,
  .stat-grid.compact-stats {
    grid-template-columns: 1fr;
    display: grid;
  }
}