/* Sidebar */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-width); background: var(--bg-secondary);
  border-right: 1px solid var(--border); z-index: 100;
  display: flex; flex-direction: column;
  transition: width 0.25s ease, transform 0.25s ease;
  overflow: hidden;
}
.sidebar.collapsed { width: var(--sidebar-collapsed); }
.sidebar.collapsed .sidebar__title,
.sidebar.collapsed .nav-label { opacity: 0; width: 0; overflow: hidden; }
.sidebar__brand {
  display: flex; align-items: center; gap: var(--space-md);
  padding: var(--space-lg); height: var(--topbar-height);
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.sidebar__logo { border-radius: var(--radius-sm); flex-shrink: 0; }
.sidebar__title { font-weight: 700; font-size: 16px; white-space: nowrap; transition: opacity 0.2s; }
.sidebar__nav { flex: 1; padding: var(--space-sm) 0; overflow-y: auto; }
.nav-item {
  display: flex; align-items: center; gap: var(--space-md);
  padding: 10px var(--space-lg); color: var(--text-secondary);
  border-left: 3px solid transparent; transition: all 0.15s;
  white-space: nowrap;
}
.nav-item:hover { color: var(--text-primary); background: rgba(255,255,255,0.03); }
.nav-item.active {
  color: var(--accent); border-left-color: var(--accent);
  background: var(--accent-dim);
}
.nav-icon { width: 20px; height: 20px; flex-shrink: 0; }
.nav-label { transition: opacity 0.2s; }
.nav-divider { height: 1px; background: var(--border); margin: var(--space-sm) var(--space-lg); }

/* Main */
.main {
  margin-left: var(--sidebar-width); min-height: 100vh;
  display: flex; flex-direction: column; transition: margin-left 0.25s ease;
}
.sidebar.collapsed ~ .main { margin-left: var(--sidebar-collapsed); }

/* Topbar */
.topbar {
  height: var(--topbar-height); display: flex; align-items: center;
  padding: 0 var(--space-lg); gap: var(--space-md);
  border-bottom: 1px solid var(--border); background: var(--bg-secondary);
  position: sticky; top: 0; z-index: 50; flex-shrink: 0;
}
.topbar__toggle {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  color: var(--text-secondary); transition: all 0.15s;
}
.topbar__toggle:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }
.topbar__title { font-size: 18px; font-weight: 600; flex: 1; }
.topbar__actions { display: flex; align-items: center; gap: var(--space-sm); }

/* Content */
.content { flex: 1; padding: var(--space-lg); max-width: 1440px; width: 100%; }

/* Grid system */
.grid { display: grid; gap: var(--space-lg); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-1 { grid-template-columns: 1fr; }

/* Footer */
.footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-md) var(--space-lg);
  color: var(--text-muted); font-size: 12px;
  border-top: 1px solid var(--border); flex-shrink: 0;
}

/* Offline banner */
.offline-banner {
  background: rgba(251, 191, 36, 0.12); color: var(--warning);
  padding: var(--space-sm) var(--space-lg); font-size: 12px; font-weight: 500;
  text-align: center;
}

/* Date range */
.date-range-selector { position: relative; }
.date-range-trigger {
  display: flex; align-items: center; gap: var(--space-xs);
  padding: 6px 12px; background: var(--bg-tertiary);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-secondary); transition: all 0.15s;
}
.date-range-trigger:hover { border-color: var(--border-hover); color: var(--text-primary); }
.date-range-dropdown {
  position: absolute; top: calc(100% + 4px); right: 0;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: var(--space-xs);
  min-width: 160px; box-shadow: var(--shadow-card);
  display: none; z-index: 60;
}
.date-range-dropdown.open { display: block; }
.date-range-option {
  display: block; width: 100%; text-align: left;
  padding: 8px 12px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-secondary); transition: all 0.1s;
}
.date-range-option:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }
.date-range-option.active { background: var(--accent-dim); color: var(--accent); }

/* Responsive */
@media (max-width: 1200px) {
  .sidebar { width: var(--sidebar-collapsed); }
  .sidebar .sidebar__title, .sidebar .nav-label { opacity: 0; width: 0; overflow: hidden; }
  .main { margin-left: var(--sidebar-collapsed); }
  .sidebar:hover { width: var(--sidebar-width); }
  .sidebar:hover .sidebar__title, .sidebar:hover .nav-label { opacity: 1; width: auto; }
}
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); width: var(--sidebar-width); }
  .sidebar.mobile-open { transform: translateX(0); }
  .main { margin-left: 0; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .topbar__title { font-size: 15px; }
}