:root {
  --bg-main: #0b0f19;
  --bg-card: #111827;
  --bg-sidebar: #070a12;
  --bg-hover: #1f2937;
  --border-color: #1f293d;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;
  --sidebar-w: 260px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  height: 100vh;
  display: flex;
  overflow: hidden;
}

/* App Layout */
#app {
  display: flex;
  width: 100vw;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.brand {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #fff;
  font-size: 16px;
}

.brand-text h2 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.brand-text span {
  font-size: 11px;
  color: #8b5cf6;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-menu {
  padding: 16px 12px;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-header {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: #4b5563;
  padding: 12px 12px 4px 12px;
  letter-spacing: 0.8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.nav-item.active {
  background-color: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  font-weight: 600;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 12px;
}

.tenant-badge {
  background-color: #1e293b;
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tenant-label {
  color: var(--text-muted);
  font-size: 11px;
}

.tenant-val {
  font-weight: 600;
  color: #38bdf8;
}

/* Main Content Area */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Topbar */
.topbar {
  height: 64px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  flex-shrink: 0;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  background-color: rgba(16, 185, 129, 0.1);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.btn-logout {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.btn-logout:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
}

/* Content Body */
.content-body {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
}

/* Cards & Grid */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.stat-title {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
}

.stat-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

th {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: middle;
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.01);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-success { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.badge-info { background: rgba(6, 182, 212, 0.15); color: #38bdf8; }
.badge-neutral { background: rgba(156, 163, 175, 0.15); color: #d1d5db; }
.badge-purple { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}
.btn-primary:hover { background-color: var(--primary-hover); }

.btn-secondary {
  background-color: var(--bg-hover);
  color: var(--text-main);
  border-color: var(--border-color);
}
.btn-secondary:hover { background-color: #374151; }

.btn-sm {
  padding: 4px 8px;
  font-size: 11px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.tab {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--text-main);
}

.tab.active {
  color: #60a5fa;
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* Code & Pre */
pre {
  background-color: #050811;
  padding: 12px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: #e5e7eb;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

/* DAG Visualizer */
.dag-container {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px;
  background: #060913;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.dag-node {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 6px;
  padding: 10px 14px;
  text-align: center;
}

.dag-node-title {
  font-size: 12px;
  font-weight: 600;
  color: #f8fafc;
}

.dag-node-type {
  font-size: 10px;
  color: #94a3b8;
  margin-top: 2px;
}

.dag-arrow {
  color: #64748b;
  font-weight: bold;
}

/* Notice Banner */
.notice-banner {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: 6px;
  padding: 12px 16px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: #bfdbfe;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 90%;
  max-width: 600px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background-color: #0b0f19;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--text-main);
  font-size: 13px;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

.auth-card { max-width: 460px; margin: 8vh auto; }
.auth-copy { color: var(--text-muted); margin-bottom: 20px; }
.error-banner { color: #fecaca; background: rgba(239, 68, 68, 0.12); border-color: rgba(239, 68, 68, 0.3); }

/* Empty & Loading */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}