:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --bg-card-hover: #1f242c;
  --border-color: #30363d;
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  --primary: #58a6ff;
  --primary-hover: #388bfd;
  --success: #238636;
  --success-text: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --danger-bg: rgba(248, 81, 73, 0.15);
  --warning-bg: rgba(210, 153, 34, 0.15);
  --success-bg: rgba(35, 134, 54, 0.15);
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  line-height: 1.5;
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.brand {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.nav-links {
  list-style: none;
  padding: 15px 10px;
  flex: 1;
}

.nav-links li {
  margin-bottom: 4px;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-links a.active {
  border-left: 3px solid var(--primary);
}

.user-panel {
  padding: 15px 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.top-bar {
  height: 60px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 30px;
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success-text);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success-text);
}

.content-container {
  padding: 30px;
  max-width: 1400px;
  width: 100%;
}

/* Metrics Row */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
}

.metric-card .title {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-card .value {
  font-size: 1.8rem;
  font-weight: 700;
  margin-top: 4px;
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-healthy { background-color: var(--success-bg); color: var(--success-text); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning); }
.badge-critical { background-color: var(--danger-bg); color: var(--danger); }
.badge-unknown { background-color: #21262d; color: var(--text-muted); }

.badge-p0 { background-color: #b62324; color: #fff; }
.badge-p1 { background-color: #d29922; color: #fff; }
.badge-p2 { background-color: #1f6feb; color: #fff; }
.badge-p3 { background-color: #6e7681; color: #fff; }

/* Tables */
.table-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 24px;
}

.table-card .card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

th {
  background-color: #12161c;
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

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

/* Alert Banner */
.alert-banner {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 0.875rem;
  margin-bottom: 20px;
  border-left: 4px solid;
}

.alert-warning {
  background-color: var(--warning-bg);
  border-color: var(--warning);
  color: #e3b341;
}

.alert-danger {
  background-color: var(--danger-bg);
  border-color: var(--danger);
  color: #ff7b72;
}

/* Diff Viewer */
.diff-box {
  background-color: #0b0e14;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  overflow-x: auto;
}

.diff-box .add { color: #3fb950; background-color: rgba(46, 160, 67, 0.15); }
.diff-box .del { color: #f85149; background-color: rgba(248, 81, 73, 0.15); }

/* Buttons */
.btn {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary { background-color: var(--primary); color: #fff; }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-success { background-color: var(--success); color: #fff; }
.btn-danger { background-color: #da3633; color: #fff; }
.btn-outline { background-color: transparent; border-color: var(--border-color); color: var(--text-main); }
.btn-outline:hover { background-color: var(--bg-card-hover); }

/* Tabs */
.tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
  overflow-x: auto;
}

.tab-btn {
  padding: 10px 16px;
  color: var(--text-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}