:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: #1f2937;
  --border-color: #374151;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* Header Navbar */
.navbar {
  background-color: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
}

.navbar .brand-icon {
  font-size: 1.6rem;
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Container & Grid Layout */
.dashboard-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Metric Cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
  box-shadow: 0 8px 15px -3px rgba(6, 182, 212, 0.15);
}

.metric-card .title {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.metric-card .value {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -1px;
}

.metric-card.events .value { color: var(--accent-cyan); }
.metric-card.failed .value { color: var(--accent-yellow); }
.metric-card.threats .value { color: var(--accent-red); }
.metric-card.active .value { color: var(--accent-purple); }

/* Progress Bar for Metrics */
.progress-bar {
  width: 100%;
  height: 6px;
  background-color: var(--bg-secondary);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.4s ease;
}

/* Charts Section */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chart-container {
  position: relative;
  height: 280px;
  width: 100%;
}

/* Simulation Controls */
.sim-bar {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.sim-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.btn-danger:hover {
  background: var(--accent-red);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Table Styling */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 0.85rem 1rem;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(55, 65, 81, 0.5);
  color: var(--text-primary);
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-block;
  text-transform: uppercase;
}

.badge-low { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-medium { background: rgba(245, 158, 11, 0.15); color: var(--accent-yellow); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-high { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-critical { background: rgba(139, 92, 246, 0.2); color: var(--accent-purple); border: 1px solid rgba(139, 92, 246, 0.5); }

.badge-status {
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-active { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
.badge-resolved { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }

/* Filter Controls */
.filter-group {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

select, input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  font-size: 0.85rem;
  outline: none;
}

select:focus, input:focus {
  border-color: var(--accent-cyan);
}