/* PulseGate Enterprise Infrastructure Design System - Obsidian Dark Tech */
:root {
  --bg-page: #0b0f19;
  --bg-surface: #121827;
  --bg-surface-elevated: #1a2236;
  --border-color: #232e47;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --brand-primary: #6366f1;
  --brand-hover: #4f46e5;
  --brand-glow: rgba(99, 102, 241, 0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

html {
  scrollbar-gutter: stable;
}

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

body {
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Canonical Responsive Header */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo img {
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s ease;
  white-space: nowrap;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--brand-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--brand-hover);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-surface);
  border-color: var(--brand-primary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 16px;
}

/* Layout Containers */
.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px;
}

/* Hero Section */
.hero {
  padding: 40px 0 60px;
  text-align: center;
}

.hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero p {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Grids and Cards */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
}

.card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}

.stat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.stat-val {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

/* Responsive Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 32px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

th {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

tr:last-child td {
  border-bottom: none;
}

/* Status Badges */
.status-pill, .badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.badge-success, .status-ok, .status-operational {
  background-color: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-warning, .status-warn, .status-maintenance {
  background-color: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-danger, .status-danger, .status-degraded {
  background-color: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* Code & Preformatted Blocks */
pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

code {
  font-size: 13px;
  background-color: var(--bg-surface-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  color: #e2e8f0;
}

pre {
  background-color: #080c14;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
  color: #e2e8f0;
  margin-bottom: 24px;
}

pre code {
  background: transparent;
  padding: 0;
  border: none;
  color: inherit;
}

/* Sections and Content Hierarchy */
.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* Notice Banners */
.info-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--brand-primary);
  border-radius: 6px;
  padding: 16px 20px;
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--text-muted);
}

.info-box strong {
  color: var(--text-primary);
}

/* Canonical Responsive Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  margin-top: auto;
  background-color: var(--bg-page);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s ease;
}

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

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 12px;
}

.footer-contact {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-contact a {
  color: var(--brand-primary);
  text-decoration: none;
}

.footer-contact a:hover {
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .header-container {
    height: auto;
    padding: 12px 16px;
    flex-wrap: wrap;
  }
  .main-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-top: 8px;
    gap: 14px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero p {
    font-size: 16px;
  }
  .main-content {
    padding: 32px 16px;
  }
}