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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a1a1a;
  background: #ffffff;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

header {
  margin-bottom: 48px;
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 32px;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

header p {
  margin-top: 8px;
  color: #555;
  font-size: 1.05rem;
}

nav a {
  font-size: 0.875rem;
  color: #555;
  text-decoration: none;
  margin-right: 16px;
}

nav a:hover { text-decoration: underline; }

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 12px;
  color: #111;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 6px;
  color: #333;
}

p { margin-bottom: 12px; }

ul {
  margin: 8px 0 12px 20px;
}

ul li { margin-bottom: 4px; }

a { color: #007AFF; text-decoration: none; }
a:hover { text-decoration: underline; }

.contact-box {
  margin-top: 48px;
  padding: 24px;
  background: #f5f5f7;
  border-radius: 12px;
}

.contact-box h2 { margin-top: 0; }

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid #e5e5e5;
  font-size: 0.8rem;
  color: #888;
}