* {
    box-sizing: border-box;
}

body {
    padding: 1rem;
    width: 100%;
    max-width: 1200px;
    margin: auto;
}

input {
    width: 100%;
    height: 2rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
nav {
    background-color: lightgoldenrodyellow;
    padding: 1rem;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    justify-content: space-around;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

nav ul a {
    text-decoration: none;
    font-weight: bold;
    display: block;
}

nav:empty {
    display: none;
}

header {
    font-size: 2rem;
    text-align: center;
    background-color: green;
    color: white;
    padding: 1rem;
}

#login {
    padding: 2rem;
    width: 100%;
    max-width: 500px;
    margin: auto;
    background-color: antiquewhite;
}

#pageContent {
    display: flex;
    gap: 1rem;
}

#pageContent > section {
    flex: 1;
    padding: 1rem;e
}

#pageContent > nav {
    max-width: 300px;
}

.err_message {
    background-color: red;
    padding: .5rem;
    color: white;
    text-align: center;
    font-size: 1.5rem;
}

.err_message:empty {
    display: none;
}