:root {
  --bg: #0a0a0a;
  --card: #111111;
  --border: #1a1a1a;
  --text: #ffffff;
  --text-secondary: #888888;
  --accent: #00ff66;
  --degraded: #ffaa00;
  --down: #ff3333;
  --radius: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 200ms ease;
}

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

html {
  scrollbar-width: thin;
  scrollbar-color: #222 var(--bg);
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #222; border-radius: 3px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px 60px;
  flex: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.logo-icon {
  color: var(--accent);
  font-size: 22px;
  filter: drop-shadow(0 0 6px rgba(0,255,102,0.4));
}
.header-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: color var(--transition);
}
.header-link:hover { color: var(--text); }
.header-separator {
  height: 1px;
  background: var(--border);
  max-width: 860px;
  margin: 0 auto;
}

/* Global Banner */
.global-banner {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  margin-bottom: 32px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.global-banner.all-ok {
  border-color: rgba(0,255,102,0.15);
  box-shadow: 0 0 40px rgba(0,255,102,0.04);
}
.global-banner.has-issues {
  border-color: rgba(255,51,51,0.2);
  box-shadow: 0 0 40px rgba(255,51,51,0.04);
}
.banner-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.status-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: inline-block;
  margin-bottom: 4px;
  transition: background var(--transition), box-shadow var(--transition);
}
.status-dot.ok {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent), 0 0 24px rgba(0,255,102,0.3);
  animation: pulse-green 2s infinite;
}
.status-dot.degraded {
  background: var(--degraded);
  box-shadow: 0 0 12px var(--degraded), 0 0 24px rgba(255,170,0,0.3);
  animation: pulse-amber 2s infinite;
}
.status-dot.down {
  background: var(--down);
  box-shadow: 0 0 12px var(--down), 0 0 24px rgba(255,51,51,0.3);
  animation: pulse-red 2s infinite;
}
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 8px var(--accent), 0 0 20px rgba(0,255,102,0.25); }
  50% { box-shadow: 0 0 16px var(--accent), 0 0 36px rgba(0,255,102,0.4); }
}
@keyframes pulse-amber {
  0%, 100% { box-shadow: 0 0 8px var(--degraded), 0 0 20px rgba(255,170,0,0.25); }
  50% { box-shadow: 0 0 16px var(--degraded), 0 0 36px rgba(255,170,0,0.4); }
}
@keyframes pulse-red {
  0%, 100% { box-shadow: 0 0 8px var(--down), 0 0 20px rgba(255,51,51,0.25); }
  50% { box-shadow: 0 0 16px var(--down), 0 0 36px rgba(255,51,51,0.4); }
}
#global-title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
}
.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* Tier Groups */
.tier-group {
  margin-bottom: 24px;
}
.tier-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}
.tier-header:hover { background: #151515; }
.tier-name {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
}
.tier-chevron {
  color: var(--text-secondary);
  font-size: 12px;
  transition: transform var(--transition);
}
.tier-group.collapsed .tier-chevron { transform: rotate(-90deg); }
.tier-body {
  overflow: hidden;
  transition: max-height 300ms ease, opacity 200ms ease;
  max-height: 2000px;
  opacity: 1;
}
.tier-group.collapsed .tier-body {
  max-height: 0;
  opacity: 0;
}

/* Service Row */
.service-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: none;
  padding: 16px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.service-card:first-child { border-top: 1px solid var(--border); border-top-left-radius: var(--radius); border-top-right-radius: var(--radius); }
.service-card:last-child { border-bottom-left-radius: var(--radius); border-bottom-right-radius: var(--radius); }
.service-card:hover {
  background: #141414;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  z-index: 1;
  position: relative;
}
.service-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.service-info { flex: 1; min-width: 0; }
.service-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}
.service-desc {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.service-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.response-time {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}
.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}
.badge.operational { background: rgba(0,255,102,0.1); color: var(--accent); }
.badge.degraded { background: rgba(255,170,0,0.1); color: var(--degraded); }
.badge.down { background: rgba(255,51,51,0.1); color: var(--down); }
.badge.unknown { background: rgba(136,136,136,0.1); color: var(--text-secondary); }

/* Timeline */
.timeline-wrapper {
  margin-top: 12px;
}
.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.uptime-label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}
.timeline-range {
  font-size: 10px;
  color: #555;
  font-family: var(--font-mono);
}
.timeline-bar {
  display: flex;
  align-items: stretch;
  gap: 1px;
  height: 28px;
  width: 100%;
}
.timeline-segment {
  flex: 1;
  min-width: 2px;
  border-radius: 1px;
  cursor: crosshair;
  transition: opacity var(--transition), transform var(--transition);
}
.timeline-segment:hover {
  opacity: 0.8;
  transform: scaleY(1.2);
}
.seg-operational { background: var(--accent); }
.seg-degraded { background: var(--degraded); }
.seg-down { background: var(--down); }
.seg-nodata { background: #1e1e1e; }

/* Tooltip */
.tooltip {
  position: fixed;
  z-index: 9999;
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text);
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  white-space: nowrap;
  transition: opacity 100ms ease;
}
.tooltip .tt-status { font-weight: 600; margin-bottom: 2px; }
.tooltip .tt-status.operational { color: var(--accent); }
.tooltip .tt-status.degraded { color: var(--degraded); }
.tooltip .tt-status.down { color: var(--down); }
.tooltip .tt-detail { color: var(--text-secondary); }

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 32px;
}
.metric-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}
.metric-value {
  font-size: 24px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text);
  margin-bottom: 4px;
}
.metric-value.accent { color: var(--accent); }
.metric-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

/* Skeleton Loading */
.loading-skeleton { position: relative; overflow: hidden; }
.skeleton-bar {
  height: 14px;
  background: #1a1a1a;
  border-radius: 4px;
  margin-bottom: 10px;
  animation: shimmer 1.5s infinite;
}
.skeleton-bar.short { width: 40%; }
.skeleton-row {
  height: 56px;
  background: #1a1a1a;
  border-radius: var(--radius);
  margin-bottom: 8px;
  animation: shimmer 1.5s infinite;
}
.skeleton-group { padding: 16px; }
@keyframes shimmer {
  0% { opacity: 0.5; }
  50% { opacity: 1; }
  100% { opacity: 0.5; }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 20px;
  margin-top: auto;
}
.footer-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.copyright {
  font-size: 12px;
  color: var(--text-secondary);
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
}
.footer-links a {
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text); }

/* Responsive */
@media (max-width: 768px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .service-top { flex-direction: column; gap: 8px; }
  .service-meta { align-self: flex-start; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
  .global-banner { padding: 24px 16px; }
  #global-title { font-size: 17px; }
}
@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 12px 16px; }
  .container { padding: 16px 12px 40px; }
}