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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f1117;
  color: #e1e4e8;
  min-height: 100vh;
}

header {
  background: linear-gradient(135deg, #1a1f2e 0%, #0f1117 100%);
  border-bottom: 1px solid #2d333b;
  padding: 2rem;
}

.header-content h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #fff;
}

.subtitle {
  color: #8b949e;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* ─── Tab Navigation ──────────────────────────────── */

.tab-nav {
  display: flex;
  gap: 0;
  background: #161b22;
  border-bottom: 1px solid #2d333b;
  padding: 0 1.5rem;
  overflow-x: auto;
}

.tab-btn {
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: #8b949e;
  font-size: 0.8125rem;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover {
  color: #e1e4e8;
}

.tab-btn.active {
  color: #58a6ff;
  border-bottom-color: #58a6ff;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ─── Main Layout ─────────────────────────────────── */

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: #161b22;
  border: 1px solid #2d333b;
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: #58a6ff;
}

.stat-critical .stat-value { color: #f85149; }
.stat-warn .stat-value { color: #f0883e; }
.stat-ok .stat-value { color: #3fb950; }

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: #8b949e;
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─── Controls ────────────────────────────────────── */

.controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

#pkg-search {
  flex: 1;
  min-width: 200px;
  padding: 0.5rem 0.75rem;
  background: #161b22;
  border: 1px solid #2d333b;
  border-radius: 6px;
  color: #e1e4e8;
  font-size: 0.875rem;
}

#pkg-search:focus {
  outline: none;
  border-color: #58a6ff;
}

#pkg-filter {
  padding: 0.5rem 0.75rem;
  background: #161b22;
  border: 1px solid #2d333b;
  border-radius: 6px;
  color: #e1e4e8;
  font-size: 0.875rem;
}

.btn {
  padding: 0.5rem 1rem;
  background: #238636;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { background: #2ea043; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.meta {
  font-size: 0.75rem;
  color: #8b949e;
  white-space: nowrap;
}

/* ─── Table ───────────────────────────────────────── */

.table-wrapper {
  overflow-x: auto;
  background: #161b22;
  border: 1px solid #2d333b;
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

th {
  position: sticky;
  top: 0;
  background: #1c2129;
  padding: 0.625rem 0.75rem;
  text-align: left;
  font-weight: 600;
  color: #8b949e;
  border-bottom: 1px solid #2d333b;
  white-space: nowrap;
  user-select: none;
}

th.sortable { cursor: pointer; }
th.sortable:hover { color: #e1e4e8; }
th.sortable::after { content: '\2195'; margin-left: 0.25rem; opacity: 0.3; }
th.sortable.active.asc::after { content: '\2191'; opacity: 1; }
th.sortable.active.desc::after { content: '\2193'; opacity: 1; }

td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #21262d;
  vertical-align: top;
}

tr:hover { background: #1c2129; }

tr.row-security { background: rgba(248, 81, 73, 0.07); }
tr.row-security:hover { background: rgba(248, 81, 73, 0.12); }
tr.row-update { background: rgba(240, 136, 62, 0.05); }
tr.row-update:hover { background: rgba(240, 136, 62, 0.1); }

/* ─── Badges ──────────────────────────────────────── */

.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-security { background: rgba(248, 81, 73, 0.15); color: #f85149; }
.badge-update { background: rgba(240, 136, 62, 0.15); color: #f0883e; }
.badge-ok { background: rgba(63, 185, 80, 0.15); color: #3fb950; }

/* ─── Utilities ───────────────────────────────────── */

.pkg-link {
  color: #58a6ff;
  text-decoration: none;
  font-weight: 600;
}

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

.version-col {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.75rem;
}

.desc-col {
  color: #8b949e;
  max-width: 350px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.loading {
  text-align: center;
  padding: 3rem;
  color: #8b949e;
}

/* ─── Responsive ──────────────────────────────────── */

@media (max-width: 768px) {
  header { padding: 1rem; }
  main { padding: 1rem; }
  .controls { flex-direction: column; align-items: stretch; }
  #pkg-search { min-width: unset; }
  .tab-nav { padding: 0 0.5rem; }
}