* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  height: 100%;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}
header {
  flex-shrink: 0;
  background: #fff;
  padding: 10px 0;
  margin-bottom: 30px;
  border-bottom: 1px solid #e0e0e0;
}
header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header h1 {
  color: #2c3e50;
  font-size: 28px;
  font-weight: 600;
  margin: 0;
}
header h1 a {
  color: #2c3e50;
  text-decoration: none;
}
header nav {
  font-size: 16px;
}
header nav a {
  margin-left: 20px;
  color: #3498db;
  text-decoration: none;
  transition: color 0.2s;
}
header nav a:hover {
  color: #2980b9;
}
.content {
  background: #fff;
  padding: 30px;
  border-radius: 0;
  box-shadow: none;
  border: none;
  margin-bottom: 0;
}
footer {
  flex-shrink: 0;
  text-align: center;
  padding: 100px 0;
  color: #666;
  margin-top: 0;
}
footer .container {
  padding: 0 20px;
}
footer p {
  margin: 0;
}