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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1a1a1a;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background: #111827;
  padding: 1rem 2rem;
}

.site-header nav {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
}

.nav-links a {
  color: #d1d5db;
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: #fff;
}

.container {
  flex: 1;
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 2rem;
  width: 100%;
}

.hero {
  text-align: center;
  padding: 3rem 1rem;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.hero p {
  color: #4b5563;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  background: #111827;
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
}

.btn:hover {
  background: #374151;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature {
  background: #f9fafb;
  padding: 1.5rem;
  border-radius: 8px;
}

.feature h3 {
  margin-bottom: 0.5rem;
}

.page h1 {
  margin-bottom: 1rem;
}

.not-found {
  text-align: center;
}

.not-found h1 {
  font-size: 4rem;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: #6b7280;
  font-size: 0.85rem;
  border-top: 1px solid #e5e7eb;
}