:root {
  --bg-color: #ffffff;
  --text-main: #1a1a1a;
  --text-secondary: #666666;
  --accent: #0070f3;
  --card-bg: #ffffff;
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --card-hover-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

@media (max-width: 640px) {
  .container {
    padding: 3rem 1.5rem;
  }
}

/* Common Navigation */
nav {
  margin-bottom: 4rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

nav a svg {
  margin-right: 0.5rem;
}

/* Common Footer */
footer {
  text-align: center;
  padding: 4rem 0 2rem;
  border-top: 1px solid #eaeaea;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

footer p {
  margin-bottom: 0.5rem;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}