body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #ff4081;
    color: white;
    padding: 1em 0;
    text-align: center;
}

nav ul {
    background-color: #333;
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

nav ul li {
    float: left;
}

nav ul li a {
    color: white;
    display: block;
    padding: 14px 20px;
    text-align: center;
    text-decoration: none;
}

nav ul li a:hover {
    background-color: #111;
}

section {
    padding: 20px;
}

section#home {
    background-color: #f2f2f2;
}

section#about, section#directory, section#cities, section#ads, section#contact {
    background-color: #ffffff;
    margin-bottom: 20px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: relative;
    width: 100%;
}

form {
    display: flex;
    flex-direction: column;
}

form label {
    margin-top: 10px;
}

form input, form textarea, form button {
    margin-top: 5px;
    padding: 10px;
    width: 100%;
}

form button {
    background-color: #ff4081;
    border: none;
    color: rgb(216, 63, 63);
    cursor: pointer;
}

form button:hover {
    background-color: #e53935;
}

.city-list {
    column-count: 2;
}

.ads-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.ad {
    background-color: #35df26;
    border: 1px solid #ddd;
    margin: 10px;
    padding: 20px;
    width: calc(33% - 40px);
    box-sizing: border-box;
    text-align: center;
}

.ad h3 {
    margin-top: 0;
}