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

:root {
    font-family: 'Montserrat', sans-serif;

    --bg: oklch(0.9961 0.0034 325.6);
    --txt: oklch(0 0 0);
    --header-footer-bg: oklch(0.9 0.01 260);
    --link: oklch(0.398 0.123 255.206);
    --link-hover: oklch(0.45 0.13 255);
}

body {
    line-height: 1.6;
    color: var(--txt);
    background-color: var(--bg);
    scroll-behavior: smooth;
}

.container {
    max-width: 80rem;
    margin: 0 auto;
    padding: 1rem 2rem;
}

header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    padding-block: 1rem;
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--txt);
    margin-bottom: 1rem;
    animation: fadeInDown 0.6s ease-out;
}

nav {
    animation: fadeInDown 0.6s ease-out 0.2s backwards;
}

nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

nav li {
    animation: slideInNav 0.5s ease-out backwards;
}

nav li:nth-child(1) {
    animation-delay: 0.3s;
}

nav li:nth-child(2) {
    animation-delay: 0.4s;
}

nav li:nth-child(3) {
    animation-delay: 0.5s;
}

nav li:nth-child(4) {
    animation-delay: 0.6s;
}

nav li:nth-child(5) {
    animation-delay: 0.7s;
}

nav a {
    text-decoration: none;
    color: var(--txt);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    position: relative;
}

nav a:hover {
    background-color: var(--link);
    color: var(--bg);
    box-shadow: 0 4px 12px oklch(0 0 0 / 0.15);
    transform: translateY(-2px);
}

nav a:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px oklch(0 0 0 / 0.1);
}

/* inspiratie van https://dev.to/tiaeastwood/super-simple-css-animation-for-fade-in-on-page-load-2p8m  &  https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules/@keyframes  &  https://css-tricks.com/almanac/rules/k/keyframes/ vorig jaar dit ook gezien code zelf geschreven */

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInNav {
    from {
        opacity: 0;
        transform: translateX(-1rem);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

main {
    animation: fadeIn 0.8s ease-out 0.2s backwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

section {
    animation: slideUp 0.6s ease-out backwards;
}

section:nth-child(1) {
    animation-delay: 0.3s;
}

section:nth-child(2) {
    animation-delay: 0.5s;
}

section:nth-child(3) {
    animation-delay: 0.7s;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

footer {
    margin-top: 3rem;
    padding-block: 2rem;
    text-align: center;
    background-color: var(--bg);
    font-size: 0.9rem;
    color: oklch(0.373 0.005 236.64);
    padding-top: 1rem;
}

@media (min-width: 48em) {

    .header-bar {
        display: grid;
        grid-template-columns: auto 1fr;
        grid-template-rows: auto auto;
        align-items: center;
        column-gap: 2rem;
    }

  /*inspiratie van https://css-tricks.com/almanac/properties/g/grid-row-column/  &  https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/grid-row */
    .brand {
        grid-column: 1;
        grid-row: 1;
        justify-self: start;
    }

    nav {
        grid-column: 2;
        grid-row: 1;
        justify-self: end;
    }

    nav ul {
        display: flex;
        flex-direction: row;
        gap: 1.25rem;
    }

    @keyframes slideInNav {
        from {
            opacity: 0;
            transform: translateX(1rem);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }

    nav a {
        position: relative;
        padding: 0.5rem 0.75rem;
        font-weight: 500;
    }

    nav a::after {
        content: "";
        position: absolute;
        left: 50%;
        bottom: 0;
        width: 0;
        height: 2px;
        background-color: var(--link);
        transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), left 0.3s cubic-bezier(0.4, 0, 0.2, 1);   /* https://www.w3schools.com/css/css3_transitions.asp  &  https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/transition  &  https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/::after#examples */
        transform: translateX(-50%);
    }

    nav a:hover::after {
        width: 100%;
    }

    nav a:hover {
        background-color: transparent;
        color: var(--link);
        box-shadow: none;
        transform: translateY(-2px);
    }

    .lijn {
        grid-column: 1 / -1;
        grid-row: 2;
        margin-top: 1rem;
    }


    footer {
        margin-top: 3rem;
        padding-block: 2rem;
        background-color: var(--bg);
        font-size: 0.9rem;
        color: oklch(0.373 0.005 236.64);
        text-align: center;
    }
}
}