body {
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  color: #333;
  background-color: #fff;
}

/* Header styles */
header {
  background-color: #fff;
  border-bottom: 1px solid #eee;
  padding: 10px 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
}

.logo a {
  text-decoration: none;
  color: #333;
  font-size: 28px;
  font-weight: bold;
}

.logo span {
  color: #e74c3c;
}

nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  margin: 0 10px;
}

nav a {
  text-decoration: none;
  color: #333;
  font-size: 14px;
}

nav a.active {
  color: #e74c3c;
  font-weight: bold;
}

/* Content sections */
.content-section {
  padding: 40px 0;
  border-bottom: 1px solid #eee;
}

.section-title {
  font-size: 24px;
  margin-bottom: 30px;
  position: relative;
  padding-bottom: 10px;
}

.section-title:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: #3498db;
}

/* Footer */
footer {
  background-color: #2c3e50;
  color: white;
  padding: 40px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
}

.footer-column {
  flex: 1;
  padding: 0 15px;
}

.footer-column h3 {
  font-size: 18px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-column h3:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: #3498db;
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  margin-bottom: 10px;
}

.footer-column a {
  color: #ecf0f1;
  text-decoration: none;
}

.footer-column a:hover {
  color: #3498db;
}

.copyright {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #34495e;
  font-size: 14px;
  color: #bdc3c7;
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  nav ul {
    margin-top: 15px;
    flex-wrap: wrap;
  }
  
  nav li {
    margin: 5px 10px 5px 0;
  }
  
  .footer-content {
    flex-direction: column;
  }
  
  .footer-column {
    margin-bottom: 30px;
  }
}