* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: sans-serif;
    background-color: lightblue;
    line-height: 1.6;
}

h1 {
    text-align: center;
    padding: 20px;
    background-color: royalblue;
    color: white;
}

.container {
    display: flex;
    margin: 20px;
    border-radius: 8px;
    overflow: hidden;
}

.nav {
    width: 250px;
    background-color: navy;
    color: white;
    padding: 20px;
}

.nav h3 {
    border-bottom: 2px solid royalblue;
    padding-bottom: 10px;
    margin-bottom: 15px;
    color: royalblue;
    letter-spacing: 1px;
}

.nav ul {
    list-style-type: none;
}

.nav ul li {
    margin-bottom: 10px;
}

.nav ul li a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
}

.nav ul li a:hover {
    background-color: lightblue;
}

.main-content {
    flex: 1;
    padding: 20px;
    background-color: white;
}

form {
    display: flex;
    flex-direction: column;
    background-color: aliceblue;
    padding: 10px;
    border-radius: 8px;
}

form label {
    margin: 5px 0;
    font-size: 14px;
    color: navy;
}

form input,
form textarea {
    padding: 8px;
    margin-bottom: 10px;
    font-size: 14px;
    border: 1px solid lightsteelblue;
    border-radius: 4px;
}

form input:focus,
form textarea:focus {
    border-color: blue;
    outline: none;
}

form button {
    padding: 10px;
    font-size: 14px;
    border-radius: 5px;
    background-color: royalblue;
    color: white;
    border: none;
    cursor: pointer;
}

form button:hover {
    background-color: lightsteelblue;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: navy;
    color: white;
}