:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #1a2234;
  --bg-card-hover: #222d44;
  --border-color: #2a364f;
  --border-subtle: #1e293b;
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  
  --critical-red: #ef4444;
  --critical-bg: rgba(239, 68, 68, 0.15);
  --critical-border: rgba(239, 68, 68, 0.4);

  --high-orange: #f97316;
  --high-bg: rgba(249, 115, 22, 0.15);
  --high-border: rgba(249, 115, 22, 0.4);

  --med-yellow: #eab308;
  --med-bg: rgba(234, 179, 8, 0.15);
  --med-border: rgba(234, 179, 8, 0.4);

  --low-blue: #06b6d4;
  --low-bg: rgba(6, 182, 212, 0.15);
  --low-border: rgba(6, 182, 212, 0.4);

  --secure-green: #10b981;
  --secure-bg: rgba(16, 185, 129, 0.15);
  --secure-border: rgba(16, 185, 129, 0.4);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-badge {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.shield-icon {
  width: 26px;
  height: 26px;
  color: #ffffff;
}

.title-group h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.title-group .subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.status-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 500;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.status-chip.demo {
  border-color: var(--med-border);
  color: #fde047;
}

.status-chip.connected {
  border-color: var(--secure-border);
  color: #6ee7b7;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-icon {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #2563eb);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #60a5fa, var(--accent-blue));
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.6);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-blue);
}

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.75rem;
  border-radius: 6px;
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  min-width: 150px;
  z-index: 100;
}

.dropdown-menu.show {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.85rem;
}

.dropdown-menu a:hover {
  background-color: var(--bg-card-hover);
  color: var(--accent-blue);
}

/* Main Content */
.main-content {
  padding: 2rem;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, border-color 0.2s;
}

.kpi-card:hover {
  border-color: #3b82f6;
  transform: translateY(-2px);
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.kpi-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.kpi-badge.neutral { background: var(--secure-bg); color: var(--secure-green); border: 1px solid var(--secure-border); }
.kpi-badge.warning { background: var(--high-bg); color: var(--high-orange); border: 1px solid var(--high-border); }
.kpi-badge.info { background: var(--low-bg); color: var(--low-blue); border: 1px solid var(--low-border); }

.kpi-value {
  font-size: 2.25rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.kpi-footer {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Severity Bars in KPI Card */
.severity-bars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.sev-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 0.25rem;
  border-radius: 6px;
  border: 1px solid transparent;
}

.sev-item.critical { background: var(--critical-bg); border-color: var(--critical-border); color: var(--critical-red); }
.sev-item.high { background: var(--high-bg); border-color: var(--high-border); color: var(--high-orange); }
.sev-item.medium { background: var(--med-bg); border-color: var(--med-border); color: var(--med-yellow); }
.sev-item.low { background: var(--low-bg); border-color: var(--low-border); color: var(--low-blue); }

.sev-label { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; }
.sev-count { font-size: 1.25rem; font-weight: 700; }

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 1.25rem;
}

@media (max-width: 960px) {
  .charts-grid { grid-template-columns: 1fr; }
}

.chart-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  min-height: 320px;
}

.chart-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 1rem;
}

.chart-body {
  flex: 1;
  position: relative;
  width: 100%;
  height: 240px;
}

/* Explorer Section */
.explorer-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.explorer-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  gap: 1rem;
  background-color: var(--bg-secondary);
}

.view-tabs {
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 500;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn svg {
  width: 16px;
  height: 16px;
}

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

.tab-btn.active {
  background-color: var(--accent-blue);
  color: #ffffff;
  font-weight: 600;
}

.explorer-filters {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  width: 16px;
  height: 16px;
  color: var(--text-dim);
}

.search-box input {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 0.75rem 0.5rem 2.25rem;
  color: var(--text-main);
  font-size: 0.85rem;
  min-width: 260px;
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus {
  border-color: var(--accent-blue);
}

.filter-group select {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  color: var(--text-main);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.data-table th {
  background-color: #151d2f;
  padding: 0.85rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.data-table tr:hover td {
  background-color: var(--bg-card-hover);
}

.code-font {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: #93c5fd;
}

.risk-badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.risk-badge.critical { background: var(--critical-bg); color: var(--critical-red); border: 1px solid var(--critical-border); }
.risk-badge.high { background: var(--high-bg); color: var(--high-orange); border: 1px solid var(--high-border); }
.risk-badge.medium { background: var(--med-bg); color: var(--med-yellow); border: 1px solid var(--med-border); }
.risk-badge.low { background: var(--low-bg); color: var(--low-blue); border: 1px solid var(--low-border); }
.risk-badge.secure { background: var(--secure-bg); color: var(--secure-green); border: 1px solid var(--secure-border); }

.empty-state {
  text-align: center;
  padding: 3rem !important;
  color: var(--text-muted);
  font-style: italic;
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

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

.modal-content {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 90%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-close:hover {
  color: #ffffff;
}

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-cve-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modal-cve-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cve-id-link {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: #60a5fa;
  text-decoration: none;
}

.cve-id-link:hover {
  text-decoration: underline;
}

.cve-desc {
  font-size: 0.875rem;
  color: var(--text-main);
  line-height: 1.5;
}

.remediation-box {
  background: rgba(16, 185, 129, 0.1);
  border-left: 3px solid var(--secure-green);
  padding: 0.6rem 0.8rem;
  font-size: 0.85rem;
  color: #a7f3d0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}