:root {
  --color-background: #f8f9fa;
  --color-card: #ffffff;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-border: #e9ecef;
  --color-accent: #007bff;
  --color-status-up: #28a745;
  --color-status-degraded: #ffc107;
  --color-status-down: #dc3545;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --border-radius: 0.5rem;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text);
  margin: 0;
  padding: 0;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-text);
  text-decoration: none;
}
.navbar-nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
}
.nav-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
}
.nav-link:hover {
  color: var(--color-text);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0;
  border-bottom: 1px solid var(--color-border);
}
.hero-title {
  font-size: 2.5rem;
  margin: 0 0 0.5rem;
}
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Status Section */
.status-section {
  padding: 3rem 0;
}
.status-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.status-summary {
  display: flex;
  gap: 2rem;
  background-color: var(--color-card);
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}
.summary-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}
.summary-item span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.summary-item strong {
  font-size: 1.5rem;
  font-weight: 700;
}
.summary-item .color-up { color: var(--color-status-up); }
.summary-item .color-down { color: var(--color-status-down); }

.status-meta {
  text-align: right;
}
.status-meta p {
  margin: 0 0 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}
.btn-refresh {
  font-family: inherit;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  background-color: var(--color-accent);
  color: white;
  border: none;
  cursor: pointer;
}
.btn-refresh:hover {
  opacity: 0.9;
}

.status-error-alert {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

/* Utilities */
.d-none { display: none; }

/* Status Grid */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  background-color: var(--color-card); /* Default white background */
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.1);
}

/* Status-specific card coloring */
.card.up {
    background-color: #f0fff4; /* Light green */
    border-left: 5px solid var(--color-status-up);
}
.card.degraded {
    background-color: #fffaf0; /* Light yellow */
    border-left: 5px solid var(--color-status-degraded);
}
.card.down {
    background-color: #fff5f5; /* Light red */
    border-left: 5px solid var(--color-status-down);
}

.card.loading-card {
  text-align: center;
  color: var(--color-text-muted);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.status-dot {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-dot.up { background-color: var(--color-status-up); }
.status-dot.degraded { background-color: var(--color-status-degraded); }
.status-dot.down { background-color: var(--color-status-down); }
.card-title {
  font-weight: 600;
  margin: 0;
}
.card-body p {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.card-body p:last-child {
  margin-bottom: 0;
}
.card-body strong {
  color: var(--color-text);
  font-weight: 600;
}


/* Footer */
.footer {
  padding: 2rem 1.5rem;
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}
.footer p {
  margin: 0;
}
.footer a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}
.footer a:hover {
  text-decoration: underline;
}