body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: #f5f6fa;
  color: #333;
}
nav {
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 60px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}
nav img.logo {
  height: 55px;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
  margin: 0;
  padding: 0;
}
nav ul li a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.3s;
}
nav ul li a:hover {
  color: #c00;
}
header.hero {
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  padding: 40px 20px 30px;
  background: linear-gradient(135deg, #c00, #ff4d4d);
  color: #fff;
}
header.hero h1 {
  font-size: 42px;
  margin-bottom: 20px;
}
header.hero p {
  font-size: 18px;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}
.section-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  padding: 60px;
  max-width: 1200px;
  margin: auto;
}
.section {
  background: #fff;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  text-align: center;
}
.section h2 {
  color: #c00;
  margin-bottom: 15px;
}
footer {
  text-align: center;
  padding: 30px;
  color: #999;
  font-size: 14px;
  background: #fff;
  margin-top: 60px;
  box-shadow: 0 -1px 4px rgba(0,0,0,0.05);
}