/* ============================================================
   Aurora UCP — Layout
   ============================================================ */

/* ---- App Shell ---- */
.app-shell {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 100;
  flex-shrink: 0;
}

.sidebar-logo {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  padding: 0 var(--sp-5);
  border-bottom: 1px solid var(--border-subtle);
  gap: var(--sp-3);
  flex-shrink: 0;
}

.sidebar-logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo-icon svg {
  color: var(--text-inverse);
}

.sidebar-logo-text {
  font-weight: 700;
  font-size: var(--text-md);
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.sidebar-logo-sub {
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-4) 0;
}

.nav-section-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--sp-3) var(--sp-5) var(--sp-1);
  font-weight: 500;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-5);
  color: var(--text-secondary);
  font-size: var(--text-base);
  font-weight: 400;
  border-radius: 0;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
  user-select: none;
  text-decoration: none;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-glow);
  color: var(--text-accent);
  border-left: 2px solid var(--accent);
  padding-left: calc(var(--sp-5) - 2px);
}

.nav-item svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item.active svg {
  opacity: 1;
}

.nav-badge {
  margin-left: auto;
  background: var(--status-critical-bg);
  color: var(--status-critical);
  border: 1px solid var(--status-critical-border);
  border-radius: 10px;
  font-size: var(--text-xs);
  padding: 1px 7px;
  font-weight: 600;
  min-width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--sp-4) var(--sp-5);
  border-top: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.sidebar-env-badge {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.sidebar-env-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--status-healthy);
  flex-shrink: 0;
}

/* ---- Main Wrapper ---- */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ---- Topbar ---- */
.topbar {
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 var(--sp-6);
  gap: var(--sp-4);
  z-index: 50;
  flex-shrink: 0;
}

.topbar-breadcrumb {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.topbar-breadcrumb .current {
  color: var(--text-primary);
  font-weight: 500;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.topbar-time {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.topbar-alert-dot {
  position: relative;
  cursor: pointer;
}

.topbar-alert-dot .dot {
  width: 8px;
  height: 8px;
  background: var(--status-critical);
  border-radius: 50%;
  position: absolute;
  top: -2px;
  right: -2px;
}

.topbar-sep { color: var(--border-emphasis); }

.topbar-divider {
  width: 1px;
  height: 18px;
  background: var(--border-subtle);
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 4px;
}

.topbar-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.topbar-user-info { line-height: 1.2; }

.topbar-user-name {
  font-size: 12px;
  font-weight: 500;
}

.topbar-user-sub {
  font-size: 11px;
  color: var(--text-muted);
}

/* ---- View Container ---- */
.view-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-6);
  background: var(--bg-base);
}

/* ---- View Header ---- */
.view-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--sp-6);
  gap: var(--sp-4);
}

.view-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.view-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--sp-1);
}

.view-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

/* ---- Grid Layouts ---- */
.grid-cols-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); }
.grid-cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.grid-cols-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.grid-auto   { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--sp-4); }

/* ---- Dashboard-specific grid ---- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.dashboard-main-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}

.dashboard-bottom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-main-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
  .dashboard-bottom-grid { grid-template-columns: 1fr; }
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}