* {
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}

:root {
    --white: #ffffff;
    --grey: #ffffff;
    --main: #fca311;
    --sec: #14213d;
    --black: #000000;
    --red: 212, 38, 38;
    --green: 92, 199, 30;
}

body {
    margin: 0;
    padding: 0;
}

.w100 {
    width: 100%;
    display: block;
}

.text-center {
    text-align: center;
}

.simple-link {
    color: var(--sec);
    text-decoration: none;
}

/* Nav bar */

nav {
    background: #ececec;
    margin: 0;
    box-shadow: 0 0 8px 1px #888888ef;
    height: 60px;
}

nav ul {
    display: flex;
    margin: 0;
    padding: 20px 40px;
}

nav ul li {
    list-style: none;
}

nav ul .expand {
    flex-grow: 1
}

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

/* 404 page */
.page404 {
    display: grid;
    place-items: center;
    height: calc(100vh - 60px);
    text-align: center;
}
.page404 h1 {
    font-size: 10em;
    margin: 0;
}
.page404 h2 {
    font-size: 5em;
    margin: 0;
    margin-bottom: 0.3em;
} 
.page404 div.description {
    font-size: 1.5em;
}

/* Login Page */
.login-page {
    display: grid;
    place-items: center;
    margin-bottom: 40px;
}
.login-page > div {
    width: 40vw;
}
.login-page h1 {
    text-align: center;
}


/* forms */

a {
    cursor: pointer;
}

form {
    padding: 30px;
    border-radius: 10px;
    box-shadow: 2px 5px 8px 2px #66666655;
}

form label {
    display: block;
    padding-bottom: 5px;
    font-size: 1.2rem;
}

form input {
    border: none;
    box-shadow: 0 2px 5px 1px #66666655;
    border-radius: 5px;
    padding: 10px;
    width: 100%;
}

form input:invalid:focus,
form.submitted input:invalid {
    box-shadow: 0 2px 5px 1px rgba(var(--red), 0.2);
}
form.submitted input:valid {
    box-shadow: 0 2px 5px 1px rgba(var(--green), 0.2);
}

form .spacer {
    padding-bottom: 10px;
}

form fieldset {
    padding-bottom: 15px;
    border: none;
}

form fieldset .form-msg {
    font-size: 0.9rem;
}

form fieldset .error {
    color: rgb(var(--red))
}

form button {
    border-radius: 9px 10px;
    text-align: center;
    padding: 10px;
    background: none;
    border: none;
    box-shadow: 0 2px 8px 1px #66666655;
    margin-left: 50%;
    width: 50%;
    transform: translateX(-50%);
    background: var(--main);
    color: var(--black);
    font-size: 1.2rem;
}