*, *::after, *::before {
    box-sizing:border-box; 
    margin: 0;
}

html, body {
    overflow-x: clip;
}

/* MARK: Colors and fonts 
/* ---------- COLORS ----------*/
:root {
    color-scheme: light dark;

    --color-background-one:light-dark(#FFC919, #FFC919);
    --color-background-two:light-dark(#FDFDFD, #252528);
    --color-background-three:light-dark(#FFFFFF, #252528);
    --color-background-four:light-dark(#E6E6E9, #343536);
    --color-text-one:light-dark(#003082, #FFFFFF);
    --color-text-two:light-dark(#6A6A7A, #FFFFFF);
    --color-text-three:light-dark(#FFFFFF, #FFFFFF);
    --color-accent-one:light-dark(#0063D3, #0063D3);
    --color-accent-two:light-dark(#DB0028, #FF9496);
    --color-accent-three:light-dark(#3E7F67, #4DCDA5);
    --color-opacity-one:light-dark(#0063D326, #0063D380);
    --color-opacity-two:light-dark(#DB002826, #DB002826);
    --color-input:light-dark(#FFFFFF, #4D4D50);
    --color-nav:light-dark(#6A6A7A,#4D4D50);
}


/* ---------- FONTS ----------*/
@font-face {
    font-family: 'NS Sans Bold';
    src: url(../fonts/nssans-bold.woff2);
}

@font-face {
    font-family: 'NS Sans Bolditalic';
    src: url(../fonts/nssans-bolditalic.woff2);
}

@font-face {
    font-family: 'NS Sans Demi';
    src: url(../fonts/nssans-demi.woff2);
}

@font-face {
    font-family: 'NS Sans Italic';
    src: url(../fonts/nssans-italic.woff2);
}

@font-face {
    font-family: 'NS Sans Regular';
    src: url(../fonts/nssans-regular.woff2);
}





/* MARK: General
/* ---------- ALGEMEEN ----------*/
body {
    background-color: var(--color-background-four);
    font-family: 'NS Sans Regular', Arial, Helvetica, sans-serif;
    font-size: .9em;
}

header {
    background-color: var(--color-background-one);
    position: sticky;
    top: 0;

    & p {
        color: var(--color-accent-two);
        background-color: var(--color-background-two);
        padding: 1em;
        text-transform: uppercase;
    }

    & p strong {
        text-transform: uppercase;
    }

    & svg {
        width: 7em;
        margin: 1em; 
    }
}

h1 {
    color: var(--color-text-one);
    font-size: 2em;
    font-family: 'NS Sans Bold', Arial, Helvetica, sans-serif;
    margin: .5em 1em;
}

h2 {
    font-size: 1.5em;
    font-family: 'NS Sans Demi', Arial, Helvetica, sans-serif;
}





/* MARK: Form
/* ---------- FORM: navigatie ----------*/
nav {
    position: sticky;
    background-color: var(--color-background-three);

    border-radius: 10px 10px 0 0;

    padding: 2em;
    margin: 0 2em 0 2em;

    & ul {
        display: flex;
        gap: .5em;
        padding: 0;
        place-content: center;

        & li {
            list-style-type: none;
            display: flex;

            & a:has(+p) {
                background-color: var(--color-accent-one);
                color: var(--color-text-three);
            }
        }

        & a {
            background-color: var(--color-nav);
            color: var(--color-text-three);
            display: flex;
            justify-content: center;
            align-items: center;

            width: 2em;
            height: 3em;
            text-decoration: none;
            border-radius: 5px;

            &:hover {
                background-color: var(--color-background-one);
            }
        }

        & p {
            width: min-content;
            margin: .5em;
        }
    }
}


/* ---------- FORM: algemeen ----------*/
form {
    margin: 0 2em;
    background-color: var(--color-background-two);
    color: var(--color-text-two);
    border-radius: 0 0 10px 10px;

    height: 65vh;
    overflow-y: auto;

    padding: 1em;

    & > fieldset {
        padding: 1em 1em 3em 1em;
    }

    & > fieldset > legend {
        padding: .1em 0 0 0;
        font-size: 1.5em;
        font-family: 'NS Sans Bold', Arial, Helvetica, sans-serif;
    }
}

fieldset {
    margin: 1em;
    border: none;
    padding: 0;
    margin: 0;

    & legend {
        color: var(--color-text-one);
        padding: 1em 0 .5em 0;
    }
}

input {
    border-radius: 5px;

    border: .5px solid var(--color-accent-one);
    padding: .5em;
    margin: .5em 0;

    background: var(--color-input);

    &[type=date] {
        width: 100%;
        font-family: 'NS Sans Regular', Arial, Helvetica, sans-serif;
        color: var(--color-text-one);
    }

    &[type=text] {
        width: 100%;
    }
}

.name {
    display: flex;
    flex-direction: column;

    & input {
        display: block;
    }
}






/* MARK: Validity
/* ---------- Name ---------- */
/* Direct op input geplaatst: pattern klopt niet? dan GELIJK melding (dus werkt ook zonder JS) */
input:user-invalid {
background-color: var(--color-opacity-two);
}

input[aria-invalid="true"] {
    border: 1px solid var(--color-accent-two);
    border-left-width: 6px;
}

input[aria-invalid="false"] {
    border: .5px solid var(--color-accent-one);
}


/* MARK: Error message
/* ---------- Foutmelding ---------- */
.error-msg {
    color: var(--color-accent-two);
    margin: 0;
    margin-bottom: 1em;

    &:empty {
        display: none;
    }
}



/* MARK: a/button
/* ---------- PREVIOUS BUTTON ---------- */
.nav-buttons {
    display: flex;
    width: 100%;
    justify-content: space-between;
    padding: 1em;
}

.previous-button {
    text-decoration: none;
    color: var(--color-text-one);
    padding: 1em 1.5em;
    border-radius: 5px;
    border: 1px solid var(--color-accent-one);
    display: block;
    margin-right: auto;

    &:hover {
        background-color: var(--color-opacity-one);
    }
}

.next-button {
    background-color: var(--color-accent-one);
    color: var(--color-text-three);
    padding: 1em;
    border-radius: 5px;
    border: none;
    display: block;
    margin-left: auto;
    text-decoration: none;

    &:hover {
        background-color: var(--color-background-one);
        color: var(--color-text-one); 
    }
}


/* MARK: BIGGER SCREEN
/* ------ groot scherm media query ----- */
@media screen and (min-width: 48em) {
    main {
        display: grid;
        place-content:center;
    }

    nav {
        width: clamp(50em, 60vw, 55em);

        & ul {
            gap: 1em;
            & li a {
                width: 4em;
            }
        }
    }
}