body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #35424a;
    color: #ffffff;
    padding: 1rem;
    text-align: center;
}

nav {
    background-color: #2c3e50;
    padding: 0.5rem;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 10px;
}

nav ul li a {
    color: #ffffff;
    text-decoration: none;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
    padding: 20px;
}

.btn {
    display: inline-block;
    background-color: #3498db;
    color: #ffffff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
}

footer {
    background-color: #35424a;
    color: #ffffff;
    text-align: center;
    padding: 1rem;
    position: fixed;
    bottom: 0;
    width: 100%;
}