:root {
  --bg: #0f1418;
  --bg-elev: #161c22;
  --bg-elev-2: #1d242c;
  --border: #2a3440;
  --text: #e8edf2;
  --text-dim: #8b97a3;
  --accent: #6c5ce7;
  --critical: #ff5566;
  --high: #ff9933;
  --medium: #ffcc44;
  --low: #66b3ff;
  --success: #44dd88;
  --shadow: 0 1px 2px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --bg-elev: #ffffff;
    --bg-elev-2: #f0f4f8;
    --border: #d8dfe6;
    --text: #1a2028;
    --text-dim: #5a6571;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
  }
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  height: 100vh;
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.topbar-left h1 {
  font-size: 16px;
  font-weight: 600;
  display: inline;
}

.topbar-left .subtitle {
  margin-left: 10px;
  color: var(--text-dim);
  font-size: 12px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.last-update {
  color: var(--text-dim);
  font-size: 12px;
}

.refresh-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.15s;
}

.refresh-btn:hover {
  background: var(--bg-elev-2);
  transform: rotate(180deg);
}

.tabs {
  display: flex;
  gap: 2px;
  padding: 0 24px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  flex-shrink: 0;
}

.tab {
  padding: 11px 16px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}

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

.tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

main {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}

.section { display: none; }
.section.active { display: block; }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.kpi {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.kpi-value {
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 6px;
}

.kpi-label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-critical .kpi-value { color: var(--critical); }
.kpi-high .kpi-value { color: var(--high); }
.kpi-medium .kpi-value { color: var(--medium); }
.kpi-low .kpi-value { color: var(--low); }
.kpi-repairs .kpi-value { color: var(--success); }
.kpi-scans .kpi-value { color: var(--accent); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-elev-2);
  border-left: 3px solid var(--border);
  border-radius: 4px;
  font-size: 13px;
  align-items: center;
}

.item.critical { border-left-color: var(--critical); }
.item.high { border-left-color: var(--high); }
.item.medium { border-left-color: var(--medium); }
.item.low { border-left-color: var(--low); }
.item.success { border-left-color: var(--success); }
.item.info { border-left-color: var(--accent); }

.item .badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--bg);
  text-align: center;
  width: fit-content;
}

.item.critical .badge { color: var(--critical); }
.item.high .badge { color: var(--high); }
.item.medium .badge { color: var(--medium); }
.item.low .badge { color: var(--low); }
.item.success .badge { color: var(--success); }
.item.info .badge { color: var(--accent); }

.item .body {
  min-width: 0;
}

.item .title {
  font-weight: 500;
  margin-bottom: 2px;
  word-break: break-word;
}

.item .meta {
  color: var(--text-dim);
  font-size: 12px;
}

.item .timestamp {
  color: var(--text-dim);
  font-size: 11px;
  white-space: nowrap;
}

.empty {
  text-align: center;
  color: var(--text-dim);
  padding: 40px 20px;
  font-size: 13px;
}

.filters {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.filter {
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
}

.filter:hover { color: var(--text); }
.filter.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.footer {
  padding: 12px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  flex-shrink: 0;
}

.footer a {
  color: var(--text-dim);
  text-decoration: none;
}

.footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

@media (max-width: 600px) {
  .topbar { padding: 10px 14px; }
  main { padding: 14px; }
  .item { grid-template-columns: 70px 1fr; }
  .item .timestamp { grid-column: 2; font-size: 10px; }
}