* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1f2937;
  background: #f9fafb;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 20px;
}

.site-header {
  background: white;
  border-bottom: 1px solid #e5e7eb;
}

.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.logo img {
  height: 32px;
  margin-right: 10px;
}

.nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #374151;
  font-weight: 500;
}

.hero {
  padding: 80px 0;
  background: linear-gradient(to bottom right, #0f172a, #020617);
  color: white;
}

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

.btn-primary {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;
  background: #3b82f6;
  color: white;
  border-radius: 6px;
  text-decoration: none;
}

.features {
  padding: 60px 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.page {
  padding: 60px 0;
}

.site-footer {
  padding: 30px 0;
  text-align: center;
  font-size: 0.9rem;
  color: #6b7280;
}