body{
    margin: 0;
}
nav{
    display: flex;
    justify-content: center;
    padding: 10px 0;
    border-bottom: 1px solid #000000;
}
nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
}
nav a{
    text-decoration: none;
    color: black;
}
nav a:hover{
    text-decoration: underline;
}
header{
    text-align: center;
}
header h1{
    margin-bottom: 0;
}
form{
    display: flex;
    justify-content: center;
    margin-top: 20px;
    width: 100%;
}
form button{
    margin-left: 10px;
}
form input{
    width: 80%;
}
footer{
    text-align: center;
    margin-top: 20px;
}