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

body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(ellipse at 15% 0%, rgba(124, 58, 237, 0.07), transparent 55%),
    radial-gradient(ellipse at 85% 100%, rgba(88, 101, 242, 0.05), transparent 55%),
    #111827;
  color: #f9fafb;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(17, 24, 39, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0 2rem;
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: #f9fafb;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: #9ca3af;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active { color: #f9fafb; }

main {
  flex: 1;
  padding: 2rem;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
}

footer {
  text-align: center;
  padding: 1.5rem 2rem;
  color: #4b5563;
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

footer a { color: #6b7280; text-decoration: none; }
footer a:hover { color: #9ca3af; }