:root,
[data-theme="dark"] {
  --bg: #0b1220;
  --bg-elevated: #121a2b;
  --bg-sidebar: #0e1626;
  --border: #243049;
  --text: #e8eef9;
  --text-muted: #9aa8c2;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --danger: #f87171;
  --warning: #fbbf24;
  --success: #34d399;
  --info: #60a5fa;
  --critical: #ef4444;
  --high: #f97316;
  --medium: #eab308;
  --low: #22c55e;
  --card-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
  --input-bg: #0a101c;
}

[data-theme="light"] {
  --bg: #f3f6fb;
  --bg-elevated: #ffffff;
  --bg-sidebar: #eef2f8;
  --border: #d5deea;
  --text: #152033;
  --text-muted: #5b6b82;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #059669;
  --info: #2563eb;
  --critical: #dc2626;
  --high: #ea580c;
  --medium: #ca8a04;
  --low: #16a34a;
  --card-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  --input-bg: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
}

.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem 0.5rem;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(145deg, #1d4ed8, #0ea5e9);
  display: grid;
  place-items: center;
  color: white;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 0.95rem;
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-list a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  color: var(--text-muted);
}

.nav-list a:hover,
.nav-list a.active {
  background: rgba(59, 130, 246, 0.12);
  color: var(--text);
}

.nav-list a.disabled {
  opacity: 0.55;
  cursor: default;
}

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 85%, transparent);
}

.topbar h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.content {
  padding: 1.5rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card,
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
}

a.stat-card-link {
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
a.stat-card-link:hover,
a.stat-card-link:focus-visible {
  border-color: var(--accent, #3d8bfd);
  box-shadow: 0 0 0 1px var(--accent, #3d8bfd);
  outline: none;
}

.stat-card {
  padding: 1rem 1.1rem;
}

.stat-card .label {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.stat-card .value {
  font-size: 1.75rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.stat-card .hint {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.panel {
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
}

.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--text);
  --bs-table-border-color: var(--border);
  --bs-table-striped-bg: color-mix(in srgb, var(--bg) 60%, transparent);
  --bs-table-hover-bg: color-mix(in srgb, var(--accent) 8%, transparent);
  color: var(--text);
}

.form-control,
.form-select {
  background: var(--input-bg);
  border-color: var(--border);
  color: var(--text);
}

.form-control:focus,
.form-select:focus {
  background: var(--input-bg);
  color: var(--text);
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.2);
}

.form-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-outline-secondary {
  color: var(--text-muted);
  border-color: var(--border);
}

.severity-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.severity-critical {
  color: var(--critical);
  background: color-mix(in srgb, var(--critical) 15%, transparent);
  border-color: color-mix(in srgb, var(--critical) 35%, transparent);
}

.severity-high {
  color: var(--high);
  background: color-mix(in srgb, var(--high) 15%, transparent);
  border-color: color-mix(in srgb, var(--high) 35%, transparent);
}

.severity-medium {
  color: var(--medium);
  background: color-mix(in srgb, var(--medium) 15%, transparent);
  border-color: color-mix(in srgb, var(--medium) 35%, transparent);
}

.severity-low {
  color: var(--low);
  background: color-mix(in srgb, var(--low) 15%, transparent);
  border-color: color-mix(in srgb, var(--low) 35%, transparent);
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse at top, rgba(37, 99, 235, 0.18), transparent 50%),
    var(--bg);
}

.login-card {
  width: min(420px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  box-shadow: var(--card-shadow);
}

.login-card h1 {
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.login-card .subtitle {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.alert {
  border: 1px solid var(--border);
}

.empty-state {
  color: var(--text-muted);
  padding: 1.5rem 0;
  text-align: center;
}

.chart-wrap {
  position: relative;
  height: 220px;
}

.muted {
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
  }
}