:root {
  --bg: #0b0d12;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #a1a1aa;
  --border: rgba(255,255,255,0.12);
  --tab: rgba(255,255,255,0.06);
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

.nav {
  position: sticky;
  top: 0;
  background: rgba(11,13,18,0.78);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 24px;
  max-width: 980px;
  margin: 0 auto;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.2px;
}

.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tab {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--muted);
  text-decoration: none;
  background: transparent;
}

.tab:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text);
}

.tab[aria-current="page"] {
  background: var(--tab);
  border-color: var(--border);
  color: var(--text);
}

.card {
  background: rgba(17,24,39,0.70);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}

h1 { margin: 0 0 10px; }
p { color: var(--muted); line-height: 1.5; }