:root {
  --primary: #3b82f6;
  --dark: #111827;
  --gray: #6b7280;
  --bg: #f9fafb;
  --white: #ffffff;
}

[data-theme="dark"] {
  --primary: #3b82f6;
  --dark: #f9fafb;
  --gray: #d1d5db;
  --bg: #111827;
  --white: #1f2937;
}

body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--dark);
}

header {
  background: var(--white);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

nav a {
  margin-left: 1.5rem;
  text-decoration: none;
  color: var(--gray);
  font-weight: 500;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4rem 2rem;
  text-align: center;
  background: var(--white);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  color: var(--gray);
}

.hero .cta {
  margin-top: 2rem;
}

.hero .cta a {
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
}

.features, .how-it-works {
  padding: 4rem 2rem;
  text-align: center;
}

.features h2, .how-it-works h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.feature {
  background: var(--white);
  border-radius: 8px;
  padding: 2rem;
  max-width: 300px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

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

.footer {
  background: var(--white);
  color: dark;
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .feature-list {
    flex-direction: column;
    align-items: center;
  }
}