:root {
  --bg-dark: #05060a;
  --bg-panel: #0b0d16;
  --bg-panel-soft: #111321;
  --border-strong: #3e78d1;
  --border-soft: rgba(62, 120, 209, 0.45);
  --accent-blue: #5a96ff;
  --accent-teal: #35b8c4;
  --accent-magenta: #f05a9a;
  --text-primary: #f3f5fb;
  --text-muted: #8b93b4;
  --status-online: #46c38a;
  --status-degraded: #f3c768;
  --status-offline: #ff6b8b;
  --shadow-strong: 0 20px 40px rgba(0, 0, 0, 0.7);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 999px;
  --transition-fast: 140ms ease-out;
}

/* Base layout */
.hub-body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: #020309;
}

.hub-shell {
  width: min(1100px, 100%);
  background: var(--bg-panel);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.85);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  margin: clamp(16px, 3vw, 32px) auto;
}

/* Top nav */
.hub-header {
  background: #0c0f1a;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.hub-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  gap: 12px;
}

.hub-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-primary);
}

.hub-brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(91, 182, 255, 0.5);
}

.hub-brand-text {
  font-family: "Orbitron", system-ui, sans-serif;
  letter-spacing: 0.16em;
  font-size: 0.86rem;
  text-transform: uppercase;
}

.hub-nav-center {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.hub-nav-link {
  font-size: 0.86rem;
  padding: 6px 10px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.hub-nav-link:hover,
.hub-nav-link:focus-visible {
  color: var(--text-primary);
  border-color: var(--border-soft);
  background: rgba(39, 212, 255, 0.1);
}

.hub-nav-link-active {
  color: var(--accent-blue);
  border-color: var(--border-strong);
  background: rgba(39, 212, 255, 0.12);
}

/* Main content */
.hub-main {
  padding: 20px 24px 16px;
  background: transparent;
}

/* Main layout: stacked sections (feature grid style) */
.hub-layout {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hub-section {
  background: transparent;
  border-radius: 0;
  border: none;
  padding: 0;
  margin-bottom: 16px;
}

.hub-section--status {
  margin-bottom: 0;
}

.hub-section-header {
  margin-bottom: 10px;
}

.hub-section-title {
  margin: 0 0 6px;
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.hub-section-desc {
  margin: 4px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Feature-style header above grid */
.hub-feature-header {
  text-align: center;
  margin-bottom: 18px;
}

.hub-feature-title {
  margin: 0 0 4px;
  font-size: 1.4rem;
  font-weight: 600;
}

.hub-feature-subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Sidebar status panel */
.hub-status-panel {
  background: var(--bg-panel-soft);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 10px 10px 12px;
}

.hub-status-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hub-status-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  column-gap: 8px;
  row-gap: 0;
  align-items: center;
  padding: 5px 10px;
  border-radius: 10px;
  background: rgba(4, 10, 24, 0.9);
}

.hub-status-row-name {
  font-size: 0.8rem;
  color: var(--text-primary);
}

.hub-status-row-pill {
  justify-self: end;
}

.hub-status-row-detail {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 18px;
}

/* System cards */
.system-card {
  background: #141827;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 20px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 220px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.system-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.system-card:hover,
.system-card:focus-within {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.85);
}

.system-card-header {
  display: flex;
  gap: 9px;
  align-items: center;
}

.system-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  color: var(--accent-blue);
  flex-shrink: 0;
  font-size: 1.1rem;
}

.system-card-title-wrap {
  min-width: 0;
}

.system-card-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0.02em;
}

.system-card-subtitle {
  margin: 2px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.system-card-copy {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.system-card-points {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.system-card-points li {
  margin-bottom: 4px;
}

.system-card-status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  padding-top: 4px;
  border-top: 1px solid rgba(70, 162, 255, 0.15);
}

.system-status-pill {
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border: 1px solid rgba(91, 182, 255, 0.5);
  background: rgba(6, 14, 28, 0.95);
  color: var(--accent-teal);
}

.system-status-pill--online {
  border-color: rgba(63, 208, 160, 0.9);
  background: radial-gradient(circle at 0 0, rgba(63, 208, 160, 0.32), rgba(5, 16, 28, 0.98));
  color: var(--status-online);
}

.system-status-pill--degraded {
  border-color: rgba(255, 204, 102, 0.9);
  background: radial-gradient(circle at 0 0, rgba(255, 204, 102, 0.3), rgba(32, 24, 6, 0.96));
  color: var(--status-degraded);
}

.system-status-pill--offline {
  border-color: rgba(255, 107, 139, 0.9);
  background: radial-gradient(circle at 0 0, rgba(255, 107, 139, 0.45), rgba(40, 6, 12, 0.96));
  color: var(--status-offline);
}

.system-status-pill--checking {
  border-style: dashed;
  opacity: 0.9;
}

@keyframes hub-status-pulse {
  0%, 100% { box-shadow: 0 0 6px rgba(91, 182, 255, 0.45); }
  50% { box-shadow: 0 0 14px rgba(63, 208, 216, 0.7); }
}

body[data-reduced-motion="false"] .system-status-pill--checking {
  animation: hub-status-pulse 1.1s ease-in-out infinite;
}

.system-status-detail {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
}

.system-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.system-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.86rem;
  min-width: 90px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.system-button--primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-teal));
  color: #02030a;
  border-color: rgba(0, 0, 0, 0.2);
  box-shadow: 0 0 14px rgba(63, 208, 216, 0.6);
}

.system-button--primary:hover,
.system-button--primary:focus-visible {
  box-shadow:
    0 0 18px rgba(63, 208, 216, 0.9),
    0 0 24px rgba(240, 90, 166, 0.6);
}

.system-button--ghost {
  background: transparent;
  color: var(--accent-blue);
  border-color: rgba(39, 212, 255, 0.5);
}

.system-button--ghost:hover,
.system-button--ghost:focus-visible {
  border-color: var(--accent-magenta);
  color: var(--accent-magenta);
  background: rgba(39, 212, 255, 0.08);
}


/* Footer */
.hub-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  background: #0c0f1a;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hub-footer-right {
  color: var(--accent-blue);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .hub-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .hub-nav {
    flex-wrap: wrap;
  }

  .hub-nav-center {
    order: 3;
    width: 100%;
    justify-content: flex-start;
  }

  .hub-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .hub-main {
    padding: 14px 12px 16px;
  }

  .hub-status-strip {
    flex-direction: column;
    align-items: flex-start;
  }

  .hub-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}