:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface2: #273549;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --critical: #ef4444;
  --high: #f97316;
  --medium: #eab308;
  --low: #3b82f6;
  --success: #22c55e;
  --sidebar-w: 220px;
  --radius: 8px;
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

/* Layout */
.layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

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

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.sidebar-nav {
  flex: 1;
  padding: 8px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-radius: 0;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
  font-size: 13.5px;
}

.nav-item:hover { background: var(--surface2); color: var(--text); }
.nav-item.active { background: var(--accent); color: #fff; }

.sidebar-footer {
  padding: 8px 0;
  border-top: 1px solid var(--border);
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 56px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

.page-title {
  font-size: 16px;
  font-weight: 600;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
  color: var(--muted);
}

.search-box input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 13px;
  width: 220px;
}

.search-box input::placeholder { color: var(--muted); }

.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card-title {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

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

.stat-label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.stat-value.critical { color: var(--critical); }
.stat-value.high { color: var(--high); }
.stat-value.medium { color: var(--medium); }
.stat-value.low { color: var(--low); }
.stat-value.success { color: var(--success); }

/* Table */
.table-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.table-header h2 {
  font-size: 14px;
  font-weight: 600;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  padding: 10px 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--surface2); }

tbody td {
  padding: 11px 20px;
  font-size: 13px;
  vertical-align: middle;
}

.td-mono {
  font-family: ui-monospace, monospace;
  font-size: 12px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-critical { background: rgba(239,68,68,0.15); color: var(--critical); }
.badge-high     { background: rgba(249,115,22,0.15); color: var(--high); }
.badge-medium   { background: rgba(234,179,8,0.15);  color: var(--medium); }
.badge-low      { background: rgba(59,130,246,0.15); color: var(--low); }
.badge-unknown  { background: rgba(148,163,184,0.15); color: var(--muted); }

.badge-cat {
  background: var(--surface2);
  color: var(--muted);
  border: 1px solid var(--border);
  font-size: 10px;
  padding: 1px 6px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background 0.15s;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--border); }

/* Links */
.link { color: var(--accent); cursor: pointer; }
.link:hover { text-decoration: underline; }

/* Detail page */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.detail-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.detail-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail-value {
  font-size: 14px;
  font-weight: 500;
}

/* Search bar for pages */
.page-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.filter-select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 7px 12px;
  font-size: 13px;
  cursor: pointer;
  outline: none;
}

.filter-select:focus { border-color: var(--accent); }

/* Loading / empty */
.loading-state, .empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--muted);
  font-size: 14px;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  justify-content: flex-end;
}

.pagination span { color: var(--muted); font-size: 13px; }

/* Back button */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 16px;
  cursor: pointer;
}

.back-btn:hover { color: var(--text); }

/* OS Badges */
.badge-os { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; letter-spacing: 0.03em; }
.badge-os-ubuntu  { background: rgba(233,84,32,0.15);   color: #e95420; }
.badge-os-debian  { background: rgba(215,7,81,0.15);    color: #d70751; }
.badge-os-redhat  { background: rgba(238,0,0,0.15);     color: #ee0000; }
.badge-os-rocky   { background: rgba(16,185,129,0.15);  color: #10b981; }
.badge-os-alma    { background: rgba(0,174,233,0.15);   color: #00aee9; }
.badge-os-fedora  { background: rgba(60,110,180,0.15);  color: #6e9fe8; }
.badge-os-centos  { background: rgba(147,34,121,0.15);  color: #c263af; }
.badge-os-default { background: rgba(148,163,184,0.15); color: #94a3b8; }

/* Sortable table headers */
thead th.sortable {
  cursor: pointer;
  user-select: none;
}
thead th.sortable:hover { color: var(--text); }
thead th.sort-active { color: var(--accent); }

/* Token input in topbar */
.token-wrap {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
  color: var(--muted);
}

.token-wrap input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 13px;
  width: 160px;
}

.token-wrap input::placeholder { color: var(--muted); }

/* CVE ID external link */
.cve-link {
  color: var(--accent);
  font-family: ui-monospace, monospace;
  font-size: 12px;
}

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

/* Responsive */
@media (max-width: 900px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}