body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

header {
    background-color: #4f42b5;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header h1 {
    font-size: 36px;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #4f42b5;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content li {
    padding: 5px;
    text-align: left;
}

.dropdown-content li:hover {
    text-decoration: underline;
}

nav ul {
    list-style: none;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav a {
    text-decoration: none;
    color: #fff;
}

nav a:hover {
    text-decoration: underline;
}

section {
    padding: 20px;
}

section h2 {
    font-size: 24px;
}

footer {
    background-color: #4f42b5;
    color: #fff;
    text-align: center;
    padding: 10px;
}

address {
    font-style: normal;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}
.column {
  float: left;
  width: 33.33%;
  padding: 5px;
}
.row::after {
  content: "";
  clear: both;
  display: table;
}