header {
  width: 100%;
  background-color: var(--container-background-color);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 1rem 2rem;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

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

nav ul li {
  margin-left: 2rem;
}

nav ul li a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 700;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: var(--primary-color);
}

footer {
  width: 100%;
  background-color: var(--container-background-color);
  box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  text-align: center;
  margin-top: 4rem;
}

footer p {
  margin: 0;
  margin-bottom: 1rem;
}

footer ul {
  display: flex;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

footer ul li {
  margin: 0 1rem;
}

footer ul li a {
  text-decoration: none;
  color: var(--text-color);
  transition: color 0.3s;
}

footer ul li a:hover {
  color: var(--primary-color);
}