:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-input: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --warning: #eab308;
  --orange: #f97316;
  --danger: #ef4444;
  --purple: #a855f7;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Layout */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.sidebar-header h1 {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.sidebar-header small {
  color: var(--text-muted);
  font-size: 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--text-muted);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-item:hover { background: var(--bg-card-hover); color: var(--text); }
.nav-item.active { color: var(--accent); border-left-color: var(--accent); background: rgba(59, 130, 246, 0.1); }

.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: white;
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 10px;
  font-weight: 600;
}

.main {
  margin-left: 240px;
  flex: 1;
  padding: 24px 32px;
  min-width: 0;
}

/* Header bar */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h2 { font-size: 24px; font-weight: 700; }

/* Connection indicator */
.connection-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--bg-card);
}

.connection-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}

.connection-dot.disconnected { background: var(--danger); }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
}

.status-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.status-operational { background: rgba(34, 197, 94, 0.15); color: var(--success); }
.status-operational::before { background: var(--success); }
.status-degraded_performance { background: rgba(234, 179, 8, 0.15); color: var(--warning); }
.status-degraded_performance::before { background: var(--warning); }
.status-partial_outage { background: rgba(249, 115, 22, 0.15); color: var(--orange); }
.status-partial_outage::before { background: var(--orange); }
.status-major_outage { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.status-major_outage::before { background: var(--danger); }
.status-maintenance { background: rgba(168, 85, 247, 0.15); color: var(--purple); }
.status-maintenance::before { background: var(--purple); }
.status-unknown { background: rgba(148, 163, 184, 0.15); color: var(--text-muted); }
.status-unknown::before { background: var(--text-muted); }
.status-unmonitored { background: rgba(234, 179, 8, 0.12); color: #b45309; }
.status-unmonitored::before { background: #b45309; }

/* Severity badges */
.severity-critical { color: var(--danger); font-weight: 700; }
.severity-major { color: var(--orange); font-weight: 700; }
.severity-minor { color: var(--warning); font-weight: 600; }

/* Criticality badges */
.criticality-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}
.criticality-critical { background: rgba(239, 68, 68, 0.2); color: var(--danger); }
.criticality-high { background: rgba(249, 115, 22, 0.2); color: var(--orange); }
.criticality-medium { background: rgba(234, 179, 8, 0.2); color: var(--warning); }
.criticality-low { background: rgba(148, 163, 184, 0.2); color: var(--text-muted); }

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

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  white-space: nowrap;
}

/* Sticky actions column */
th:last-child,
td:last-child {
  position: sticky;
  right: 0;
  background: var(--bg-card);
  box-shadow: -4px 0 8px rgba(0, 0, 0, 0.15);
}

tr:hover td { background: rgba(255, 255, 255, 0.02); }
tr:hover td:last-child { background: var(--bg-card-hover); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-secondary { background: var(--bg-card-hover); color: var(--text); }
.btn-secondary:hover { background: var(--border); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-card-hover); color: var(--text); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

select.form-control { cursor: pointer; }
textarea.form-control { min-height: 80px; resize: vertical; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal h3 { margin-bottom: 20px; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* Incident timeline */
.timeline { margin: 16px 0; }

.timeline-item {
  position: relative;
  padding: 12px 16px 12px 32px;
  margin-bottom: 8px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
}

.timeline-item::after {
  content: '';
  position: absolute;
  left: 14px;
  top: 28px;
  bottom: -8px;
  width: 2px;
  background: var(--border);
}

.timeline-item:last-child::after { display: none; }

.timeline-status {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2px;
}

.timeline-message { font-size: 14px; }

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

/* Impact warning */
.impact-warning {
  background: rgba(234, 179, 8, 0.1);
  border: 1px solid rgba(234, 179, 8, 0.3);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 12px 0;
}

.impact-warning h4 {
  color: var(--warning);
  font-size: 14px;
  margin-bottom: 8px;
}

.impact-list {
  list-style: none;
  padding: 0;
}

.impact-list li {
  padding: 4px 0;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  min-width: 300px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s ease;
}

.toast.toast-danger { border-left: 4px solid var(--danger); }
.toast.toast-warning { border-left: 4px solid var(--warning); }
.toast.toast-success { border-left: 4px solid var(--success); }

.toast-title { font-weight: 600; font-size: 14px; }
.toast-body { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Vendor grid view */
.vendor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.vendor-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.15s;
}

.vendor-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.vendor-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.vendor-card-name { font-weight: 600; font-size: 15px; }
.vendor-card-category { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.vendor-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

/* File upload area */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}

.upload-area:hover { border-color: var(--accent); background: rgba(59, 130, 246, 0.05); }
.upload-area input[type="file"] { display: none; }

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

.empty-state h3 { margin-bottom: 8px; color: var(--text); }

/* Utility */
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }

/* Vendor toolbar */
.vendor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}
.vendor-toolbar .search-input {
  flex: 1;
  min-width: 180px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 13px;
}
.vendor-toolbar .search-input:focus {
  outline: none;
  border-color: var(--accent);
}
.vendor-toolbar select {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}
.vendor-toolbar .toolbar-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-right: -4px;
}
.vendor-toolbar .result-count {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
}

/* Sortable table headers */
th.sortable {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
th.sortable:hover {
  color: var(--accent);
}
th.sortable .sort-arrow {
  display: inline-block;
  margin-left: 4px;
  font-size: 11px;
  opacity: 0.3;
}
th.sortable.sort-active .sort-arrow {
  opacity: 1;
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
}