:root {
  --ocean-deep: #0b192c;
  --ocean-mid: #102a45;
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --accent: #06b6d4;
  --surface: #ffffff;
  --bg: #f1f5f9;
  --text-main: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --badge-bg: #ecfeff;
  --badge-border: #a5f3fc;
  --badge-text: #0e7490;
  --success-bg: #f0fdf4;
  --success-border: #86efac;
  --success-text: #166534;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  color: var(--text-body);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Top Hero / Navigation Bar */
.site-header {
  background: linear-gradient(135deg, var(--ocean-deep) 0%, var(--ocean-mid) 55%, #0e4a6f 100%);
  color: #ffffff;
  padding: 28px 20px 32px;
  border-bottom: 3px solid var(--accent);
}

.header-inner {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: #ffffff;
}

.brand-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.brand-text h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-align: left;
}

.brand-text span {
  display: block;
  font-size: 0.88rem;
  color: #bae6fd;
  font-weight: 500;
  text-align: left;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 4px;
}

.site-nav a {
  color: #e0f2fe;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
}

.site-nav a.active {
  background: var(--accent);
  color: #082f49;
  border-color: var(--accent);
}

/* Main Content Container */
.main-wrap {
  max-width: 920px;
  margin: -18px auto 48px;
  padding: 0 16px;
}

.card {
  background: var(--surface);
  border-radius: 16px;
  padding: 40px 44px;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 4px 10px -4px rgba(15, 23, 42, 0.04);
  border: 1px solid var(--border);
}

.meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--badge-text);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 4px 12px;
  border-radius: 999px;
}

.badge-green {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success-text);
}

h1.page-title {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-top: 32px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--bg);
}

h3 {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 20px;
  margin-bottom: 8px;
}

p, ul, ol {
  margin-bottom: 14px;
}

ul, ol {
  padding-left: 24px;
}

li {
  margin-bottom: 7px;
}

a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

a:hover {
  text-decoration: underline;
}

code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 0.88em;
  color: #0f172a;
}

.callout {
  background: #f0f9ff;
  border-left: 4px solid var(--primary);
  padding: 18px 20px;
  border-radius: 0 10px 10px 0;
  margin: 22px 0;
}

.callout-green {
  background: var(--success-bg);
  border-left-color: #16a34a;
}

.callout strong.callout-title {
  display: block;
  color: var(--text-main);
  font-size: 1rem;
  margin-bottom: 8px;
}

.callout ul {
  margin-bottom: 0;
}

/* Data Table */
.table-wrap {
  overflow-x: auto;
  margin: 18px 0 22px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 11px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f8fafc;
  color: var(--text-main);
  font-weight: 700;
}

/* Hub Grid on Home Page */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.hub-card {
  display: block;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  text-decoration: none;
  color: var(--text-body);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.hub-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 20px rgba(2, 132, 199, 0.1);
  text-decoration: none;
}

.hub-card h3 {
  margin-top: 0;
  color: var(--primary-dark);
  font-size: 1.12rem;
}

.hub-card p {
  margin-bottom: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  max-width: 920px;
  margin: 0 auto 40px;
  padding: 0 20px;
  text-align: center;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 10px;
}

@media (max-width: 640px) {
  .card {
    padding: 24px 20px;
  }
  h1.page-title {
    font-size: 1.5rem;
  }
  .brand-text h1 {
    font-size: 1.45rem;
  }
}