body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #ffffff;
  color: #000000;
}

header {
  background: #111;
  padding: 15px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 20px;
}

nav a {
  color: white;
  text-decoration: none;
}

main {
  padding: 40px;
  display: block;
}

footer {
  background: #f2f2f2;
  padding: 20px;
  text-align: center;
  font-size: 14px;
}
nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav > ul {
  display: flex;
  gap: 20px;
}

nav li {
  position: relative;
}

nav a {
  text-decoration: none;
  color: #000;
  font-weight: bold;
}

nav li ul {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  padding: 10px;
  border: 1px solid #ccc;
}

nav li:hover > ul {
  display: block;
}

nav li ul li {
  margin: 5px 0;
}