:root {
  --system-blue: #007AFF;
  --light-gray: #F2F2F7;
  --border-color: #E5E5EA;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: #FFFFFF;
  color: #000000;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.logo {
  font-size: 24px;
  font-weight: 600;
  color: var(--system-blue);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  color: #000000;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--system-blue);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
  flex: 1;
}

h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--system-blue);
}

h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 32px 0 16px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 8px;
}

p {
  margin-bottom: 16px;
  font-size: 16px;
}

ul {
  margin-bottom: 16px;
  padding-left: 24px;
}

li {
  margin-bottom: 8px;
}

.btn {
  background-color: var(--system-blue);
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: background-color 0.2s;
  display: inline-block;
}

.btn:hover {
  background-color: #0062CC;
}

footer {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  text-align: center;
  color: #666;
  font-size: 14px;
}

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

/* Home page specific */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 60px 0;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 16px;
}

.subtitle {
  font-size: 24px;
  color: #666;
  max-width: 600px;
  margin-bottom: 32px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin: 60px 0;
}

.feature {
  padding: 24px;
  border-radius: 12px;
  background-color: var(--light-gray);
}

.feature h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature p {
  font-size: 16px;
  color: #666;
}

/* Privacy page specific */
.policy-container {
  background-color: var(--light-gray);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 40px;
}

.last-updated {
  font-style: italic;
  color: #666;
  margin-bottom: 24px;
}

/* 404 page specific */
.error-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.error-card {
  background-color: var(--light-gray);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  width: 100%;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--system-blue);
  margin-bottom: 16px;
}

/* Responsive styles */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  
  .subtitle {
    font-size: 20px;
  }
}