html, body {
    font-family: monospace;
    height: 100%;
    margin: 0;
    background-color: #f0f0f0;
    display: flex;
    flex-direction: column;
}

header {
    width: 100%;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: #007dc5;
    color: white;
    text-align: center;
}

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

nav li {
    display: inline;
}

nav a {
    color: white;
    text-decoration: none;
}

main {
    flex: 1;
}

.container {
    height: 100%;
    display: flex;
    flex-direction: column;
    text-align: center;
    justify-content: center;
    align-items: center;
}

form {
    width: 250px
}

#email, #username, #password {
    display: block;
    box-sizing: border-box;
    width: 100%;
    max-width: 300px;
    margin: 10px auto;
    padding: 10px;
    border: 1px solid black;
    border-radius: 5px;
}

#submit {
    background-color: #007dc5;
    color: white;
    font-size: 14px;
    width: 100%;
    max-width: 300px;
    margin-bottom: 10px;
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}