/* example-petstore.com — ontwerp 2026/2027.
   Rustige developer-docs-stijl, licht en donker volgens het systeem. Moderne CSS zonder extra JavaScript of externe
   bestanden: cascade layers, native nesting, light-dark() + oklch + color-mix(), container queries, :has(), clamp(),
   text-wrap, View Transitions, scroll-driven animations, interpolate-size / ::details-content, Popover API met anchor
   positioning. Oudere browsers krijgen dezelfde inhoud zonder die extra's (progressive enhancement).
   Kleuren alleen als tokens in @layer tokens; alle tekst ≥ 4,5:1 contrast in beide thema's. */

@layer reset, tokens, base, layout, components, pages, utilities;

/* ---------- reset ---------- */
@layer reset {
    *, *::before, *::after { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
    body, h1, h2, h3, h4, p, ul, ol, dl, dd, figure, pre { margin: 0; }
    img, svg { display: block; max-width: 100%; }
    button { font: inherit; color: inherit; }
}

/* ---------- tokens ---------- */
@layer tokens {
    /* thema: volgt het systeem, tenzij de bezoeker zelf koos (data-theme, gezet door assets/prefs.js vóór de eerste weergave) */
    :root[data-theme="light"] { color-scheme: light; }
    :root[data-theme="dark"] { color-scheme: dark; }
    :root {
        color-scheme: light dark;
        interpolate-size: allow-keywords;

        /* vlakken */
        --bg:        light-dark(oklch(0.985 0.004 265), oklch(0.165 0.012 268));
        --surface:   light-dark(oklch(1 0 0),           oklch(0.205 0.014 268));
        --surface-2: light-dark(oklch(0.968 0.006 265), oklch(0.24 0.016 268));
        --glass:     light-dark(oklch(1 0 0 / 0.72),    oklch(0.18 0.013 268 / 0.72));
        --line:      light-dark(oklch(0.91 0.008 265),  oklch(0.3 0.016 268));
        --line-strong: light-dark(oklch(0.84 0.01 265), oklch(0.38 0.018 268));

        /* tekst */
        --heading: light-dark(oklch(0.2 0.03 268),  oklch(0.97 0.006 268));
        --fg:      light-dark(oklch(0.33 0.02 268), oklch(0.87 0.012 268));
        --strong:  var(--heading);
        --muted:   light-dark(oklch(0.47 0.02 268), oklch(0.74 0.014 268));
        --faint:   var(--muted);

        /* merk: indigo, met een koele tweede tint */
        --accent:        light-dark(oklch(0.52 0.19 272), oklch(0.78 0.12 272));
        --accent-strong: light-dark(oklch(0.44 0.2 272),  oklch(0.86 0.09 272));
        --accent-2:      light-dark(oklch(0.56 0.12 200), oklch(0.8 0.1 200));
        --accent-soft:   color-mix(in oklch, var(--accent) 12%, transparent);
        --ring:          color-mix(in oklch, var(--accent) 45%, transparent);

        /* signaal */
        --warn-bg:   light-dark(oklch(0.97 0.05 85),  oklch(0.27 0.05 70));
        --warn-line: light-dark(oklch(0.83 0.13 80),  oklch(0.55 0.11 70));
        --warn-fg:   light-dark(oklch(0.42 0.1 60),   oklch(0.9 0.09 85));
        --ok:        light-dark(oklch(0.49 0.13 155), oklch(0.78 0.14 155));
        --ok-soft:   color-mix(in oklch, var(--ok) 12%, transparent);
        --bad:       light-dark(oklch(0.55 0.19 25),  oklch(0.75 0.14 25));

        /* code */
        --code-bg:   light-dark(oklch(0.975 0.005 265), oklch(0.14 0.012 268));
        --code-fg:   light-dark(oklch(0.28 0.03 268),   oklch(0.9 0.012 268));
        --code-bar:  light-dark(oklch(0.95 0.007 265),  oklch(0.19 0.014 268));
        --ph-bg:     light-dark(oklch(0.95 0.1 100),    oklch(0.4 0.09 95));
        --ph-fg:     light-dark(oklch(0.38 0.09 80),    oklch(0.95 0.08 100));
        --ph-line:   light-dark(oklch(0.72 0.14 90),    oklch(0.8 0.13 95));

        /* compatibiliteit met oudere regels (/stats) */
        --band: var(--surface-2);
        --footer-fg: var(--muted);
        --nav: var(--heading);
        --pill: var(--surface-2);

        /* vorm en beweging */
        --radius-lg: 18px;
        --radius: 12px;
        --radius-sm: 8px;
        --shadow-sm: 0 1px 2px light-dark(oklch(0.2 0.03 268 / 0.06), oklch(0 0 0 / 0.3));
        --shadow:    0 1px 2px light-dark(oklch(0.2 0.03 268 / 0.05), oklch(0 0 0 / 0.3)),
                     0 8px 28px -12px light-dark(oklch(0.2 0.05 268 / 0.18), oklch(0 0 0 / 0.55));
        --ease: cubic-bezier(.2, .7, .2, 1);

        /* typografie: systeemletters (geen externe fonts), vloeiende schaal */
        --font: "Inter var", InterVariable, system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", sans-serif;
        --font-display: "Inter Display", "Segoe UI Variable Display", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
        --mono: ui-monospace, "Cascadia Code", "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
        --step--1: clamp(.84rem, .82rem + .1vw, .9rem);
        --step-0:  clamp(1rem, .97rem + .15vw, 1.075rem);
        --step-1:  clamp(1.15rem, 1.08rem + .35vw, 1.35rem);
        --step-2:  clamp(1.35rem, 1.2rem + .7vw, 1.8rem);
        --step-3:  clamp(1.9rem, 1.4rem + 2.4vw, 3.4rem);

        --wrap: 76rem;
        --measure: 68ch;
    }
    @media (prefers-contrast: more) {
        :root { --line: light-dark(oklch(0.7 0.01 265), oklch(0.55 0.02 268)); --muted: var(--fg); }
    }
}

/* ---------- basis ---------- */
@layer base {
    html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; scrollbar-gutter: stable; }
    @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
    body {
        min-height: 100dvh;
        display: flex;
        flex-direction: column;
        background: var(--bg);
        color: var(--fg);
        font: var(--step-0)/1.7 var(--font);
        font-feature-settings: "cv11", "ss01";
        -webkit-font-smoothing: antialiased;
        text-rendering: optimizeLegibility;
    }
    ::selection { background: color-mix(in oklch, var(--accent) 28%, transparent); }
    :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

    a {
        color: var(--accent);
        text-decoration-line: underline;
        text-decoration-color: color-mix(in oklch, var(--accent) 35%, transparent);
        text-decoration-thickness: 1px;
        text-underline-offset: .22em;
        transition: text-decoration-color .15s, color .15s;
        &:hover { color: var(--accent-strong); text-decoration-color: currentColor; }
    }

    h1, h2, h3 { color: var(--heading); text-wrap: balance; font-family: var(--font-display); }
    h1 { font-size: var(--step-3); line-height: 1.05; letter-spacing: -.035em; font-weight: 700; margin-bottom: 1.1rem; overflow-wrap: anywhere; }
    h2 { font-size: var(--step-2); line-height: 1.2; letter-spacing: -.02em; font-weight: 650; margin: 4rem 0 1.1rem; }
    h3 { font-size: var(--step-1); line-height: 1.3; letter-spacing: -.01em; font-weight: 620; margin: 0 0 .5rem; }
    p, li, dd { text-wrap: pretty; }
    p, ul, ol { margin-bottom: 1.15rem; }
    ul, ol { padding-left: 1.25rem; }
    li { margin-bottom: .45rem; }
    li::marker { color: var(--muted); }
    strong { color: var(--heading); font-weight: 620; }

    code {
        font: .86em/1.5 var(--mono);
        padding: .12em .42em;
        border-radius: 6px;
        background: var(--surface-2);
        border: 1px solid var(--line);
        color: var(--code-fg);
        overflow-wrap: anywhere;
    }
    pre {
        position: relative;
        margin: 0 0 1.25rem;
        padding: 3rem 1.25rem 1.15rem;
        background: var(--code-bg);
        color: var(--code-fg);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        overflow-x: auto;
        line-height: 1.65;
        box-shadow: var(--shadow-sm);
        /* vensterbalk met drie punten */
        background-image:
            radial-gradient(circle at 1.15rem 1.05rem, light-dark(oklch(0.7 0.16 25), oklch(0.66 0.16 25)) .3rem, transparent .32rem),
            radial-gradient(circle at 2.05rem 1.05rem, light-dark(oklch(0.8 0.14 85), oklch(0.76 0.13 85)) .3rem, transparent .32rem),
            radial-gradient(circle at 2.95rem 1.05rem, light-dark(oklch(0.72 0.15 150), oklch(0.7 0.14 150)) .3rem, transparent .32rem),
            linear-gradient(var(--code-bar), var(--code-bar));
        background-size: 100% 2.1rem;
        background-repeat: no-repeat;
        & code { background: none; border: 0; padding: 0; font-size: .84rem; overflow-wrap: normal; white-space: pre; }
    }
    mark.ph {
        background: var(--ph-bg);
        color: var(--ph-fg);
        border-bottom: 1.5px dashed var(--ph-line);
        border-radius: 3px;
        padding: 0 .12em;
    }
}

/* ---------- schil ---------- */
@layer layout {
    .wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(1rem, 3vw, 2rem); }
    body.is-wide { --wrap: 84rem; }

    /* decoratieve achtergrond bovenaan: zacht verloop en een raster dat wegvaagt */
    body::before {
        content: "";
        position: absolute;
        inset: 0 0 auto 0;
        height: 34rem;
        z-index: -1;
        pointer-events: none;
        background:
            radial-gradient(60rem 22rem at 12% -10%, color-mix(in oklch, var(--accent) 16%, transparent), transparent 70%),
            radial-gradient(44rem 20rem at 88% -6%, color-mix(in oklch, var(--accent-2) 14%, transparent), transparent 70%),
            linear-gradient(color-mix(in oklch, var(--line) 55%, transparent) 1px, transparent 1px) 0 0 / 44px 44px,
            linear-gradient(90deg, color-mix(in oklch, var(--line) 55%, transparent) 1px, transparent 1px) 0 0 / 44px 44px;
        mask-image: linear-gradient(to bottom, #000 30%, transparent);
    }

    /* kopbalk: zwevend glas */
    .site-head {
        position: sticky;
        top: 0;
        z-index: 20;
        background: var(--glass);
        backdrop-filter: saturate(1.6) blur(14px);
        -webkit-backdrop-filter: saturate(1.6) blur(14px);
        border-bottom: 1px solid color-mix(in oklch, var(--line) 80%, transparent);
        & .wrap { display: flex; align-items: center; gap: .5rem; min-height: 4rem; flex-wrap: nowrap; }
        & .lang-btn { flex-shrink: 0; }
        & .brand { flex-shrink: 1; min-width: 0; }
        & .brand-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        & .site-nav { min-width: 0; overflow: hidden; margin-right: .5rem; }
    }
    .brand {
        display: inline-flex; align-items: center; gap: .65rem;
        color: var(--heading); font-weight: 650; letter-spacing: -.01em; text-decoration: none;
        margin-right: auto; user-select: none;
        &:hover { color: var(--heading); }
    }
    /* merkteken: "e" in een gestippelde cirkel (zelfde vorm als favicon.svg) */
    .brand-mark {
        display: inline-grid; place-items: center; inline-size: 2rem; block-size: 2rem; flex-shrink: 0;
        border: 2px dotted color-mix(in oklch, var(--accent) 75%, var(--muted));
        border-radius: 50%; font: 700 .85rem/1 var(--mono); color: var(--accent);
        background: var(--accent-soft);
        &::before { content: attr(data-mark); }
    }
    .site-nav ul { display: flex; gap: .2rem; margin: 0; padding: 0; list-style: none; user-select: none; }
    .site-nav li { margin: 0; }
    .site-nav a {
        display: inline-block; padding: .42rem .8rem; border-radius: 999px;
        color: var(--muted); font-size: var(--step--1); font-weight: 520; text-decoration: none;
        &:hover { color: var(--heading); background: var(--surface-2); }
        &[aria-current="page"] { color: var(--heading); background: var(--surface-2); }
    }

    /* statusregel */
    .status-bar {
        font-size: var(--step--1); color: var(--muted); user-select: none;
        & p { margin: 0; padding: .9rem 0 0; }
        & strong { color: var(--heading); font-weight: 600; }
        & code { font-size: .8em; }
    }
    /* kop met animatie op de homepages (assets/hero.js); vaste hoogte, dus geen verschuiving bij het laden */
    .hero-visual {
        position: relative; block-size: clamp(8.5rem, 17vw, 13rem); margin: .4rem 0 -.6rem; overflow: hidden;
        user-select: none;
        mask-image: linear-gradient(90deg, transparent, black 9%, black 91%, transparent);
        & canvas { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; display: block; }
    }
    /* pauzeknop (WCAG 2.2.2), rechtsonder binnen het niet-vervaagde deel van de band */
    .hv-toggle {
        position: absolute; right: calc(9% + .4rem); bottom: .55rem; z-index: 1;
        display: inline-grid; place-items: center; inline-size: 2rem; block-size: 2rem; padding: 0; cursor: pointer;
        color: var(--muted); background: color-mix(in oklch, var(--surface) 88%, transparent);
        border: 1px solid var(--line); border-radius: 50%; box-shadow: var(--shadow-sm);
        &:hover { color: var(--heading); border-color: var(--line-strong); }
        &[hidden] { display: none; }
        & .i-play { display: none; }
        &.is-paused .i-play { display: block; }
        &.is-paused .i-pause { display: none; }
    }
    .hv-node {
        position: absolute; left: 50%; top: 50%; translate: -50% -50%;
        display: inline-flex; align-items: center; gap: .6rem; padding: .4rem 1rem .4rem .4rem;
        border: 1px solid var(--line); border-radius: 999px; white-space: nowrap;
        background: color-mix(in oklch, var(--surface) 90%, transparent); backdrop-filter: blur(8px);
        font: 620 clamp(.8rem, 1.5vw, .98rem)/1 var(--mono); color: var(--heading);
        box-shadow: 0 0 0 4px var(--accent-soft), 0 12px 32px -14px color-mix(in oklch, var(--accent) 55%, transparent);
        transition: box-shadow .35s var(--ease), border-color .35s var(--ease), scale .35s var(--ease);
        & .brand-mark { inline-size: 1.9rem; block-size: 1.9rem; }
        &.is-hit {
            border-color: color-mix(in oklch, var(--accent) 60%, var(--line)); scale: 1.03;
            box-shadow: 0 0 0 7px var(--accent-soft), 0 14px 36px -12px color-mix(in oklch, var(--accent) 70%, transparent);
        }
    }
    .status-dot {
        display: inline-block; inline-size: .55rem; block-size: .55rem; margin-right: .55rem; border-radius: 50%;
        background: var(--warn-line); vertical-align: .05rem;
        box-shadow: 0 0 0 0 color-mix(in oklch, var(--warn-line) 60%, transparent);
        animation: ep-pulse 2.4s var(--ease) 2;
    }

    /* inhoud met inhoudsopgave */
    .layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 clamp(2rem, 4vw, 4rem); }
    .site-main { flex: 1; min-width: 0; padding-block: 2.5rem 5rem; }
    @media (min-width: 64rem) {
        .layout { grid-template-columns: 14.5rem minmax(0, 1fr); }
    }

    /* voettekst */
    .site-foot {
        margin-top: auto;
        border-top: 1px solid var(--line);
        background: color-mix(in oklch, var(--surface-2) 60%, var(--bg));
        color: var(--muted);
        font-size: var(--step--1);
        & .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; padding-block: 2rem 2.5rem; }
        & p { margin: 0; }
        & a { color: var(--fg); user-select: text; }
    }
    .lang-nav ul { display: flex; flex-wrap: wrap; gap: .2rem 1rem; margin: 0; padding: 0; list-style: none; }
    .lang-nav li { margin: 0; }
    .lang-nav a { color: var(--muted); text-decoration: none; &:hover { color: var(--heading); } }
    .lang-nav a[aria-current="true"] { color: var(--heading); font-weight: 620; }
}

/* ---------- onderdelen ---------- */
@layer components {
    /* leesvoortgang (scroll-driven animation) */
    .progress { display: none; }
    @supports (animation-timeline: scroll()) {
        .progress {
            display: block; position: fixed; inset: 0 0 auto 0; z-index: 30; block-size: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-2));
            transform-origin: 0 50%; transform: scaleX(0);
            animation: ep-grow linear both; animation-timeline: scroll(root);
        }
    }

    /* taalmenu (Popover API + anchor positioning) */
    .lang-btn[popovertarget="lang-menu"] { anchor-name: --lang; }
    .lang-btn {
        display: inline-flex; align-items: center; gap: .4rem;
        padding: .42rem .75rem; border-radius: 999px; cursor: pointer;
        font-size: var(--step--1); font-weight: 600; letter-spacing: .02em; color: var(--heading);
        background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
        &:hover { border-color: var(--line-strong); }
    }
    /* licht/donker: maan in het lichte thema (klik = donker), zon in het donkere */
    .lang-btn.theme-btn {
        inline-size: 2.3rem; justify-content: center; padding-inline: 0; user-select: none;
        & .i-sun { display: none; }
    }
    :root[data-theme="dark"] .theme-btn { & .i-sun { display: block; } & .i-moon { display: none; } }
    @media (prefers-color-scheme: dark) {
        :root:not([data-theme="light"]) .theme-btn { & .i-sun { display: block; } & .i-moon { display: none; } }
    }
    .lang-menu {
        margin: 0; padding: .4rem; min-inline-size: 11rem;
        background: var(--surface); color: var(--fg);
        border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
        & ul { list-style: none; margin: 0; padding: 0; }
        & li { margin: 0; }
        & a { display: block; padding: .5rem .75rem; border-radius: var(--radius-sm); color: var(--fg); text-decoration: none; }
        & a:hover { background: var(--surface-2); color: var(--heading); }
        & a[aria-current="true"] { background: var(--accent-soft); color: var(--accent-strong); font-weight: 620; }
        &:popover-open { opacity: 1; transform: none; }
        opacity: 0; transform: translateY(-4px);
        transition: opacity .16s var(--ease), transform .16s var(--ease), overlay .16s allow-discrete, display .16s allow-discrete;
    }
    @starting-style { .lang-menu:popover-open { opacity: 0; transform: translateY(-4px); } }
    @supports (position-anchor: --lang) {
        .lang-menu { position-anchor: --lang; inset: auto; top: anchor(bottom); right: anchor(right); margin-top: .5rem; position-try-fallbacks: flip-block; }
        .site-menu { position-anchor: --menu; }
    }

    /* hamburgermenu (in deze laag, na .lang-btn, zodat display hier wint): site.js zet .is-collapsed zodra de rij niet meer volledig past, .is-compact als ook de knoppen niet passen */
    .lang-btn.menu-btn { display: none; anchor-name: --menu; inline-size: 2.3rem; justify-content: center; padding-inline: 0; }
    .site-head.is-collapsed .site-nav { display: none; }
    .site-head.is-collapsed .lang-btn.menu-btn { display: inline-flex; }
    .site-head.is-compact .wrap > .theme-btn, .site-head.is-compact .wrap > .lang-btn[popovertarget="lang-menu"] { display: none; }
    :root:not(.js) .theme-btn { display: none; }
    @media (max-width: 47.99rem) { :root:not(.js) .site-head .wrap > .lang-btn[popovertarget="lang-menu"] { display: none; } }
    @media (max-width: 47.99rem) {   /* zonder JavaScript: vaste grens */
        .site-nav { display: none; }
        .lang-btn.menu-btn { display: inline-flex; }
    }
    .site-menu {
        min-inline-size: 15rem;
        & nav a { font-weight: 560; color: var(--heading); }
        & .menu-extra { display: none; margin-top: .4rem; padding-top: .4rem; border-top: 1px solid var(--line); }
        & .menu-theme {
            display: flex; align-items: center; gap: .6rem; inline-size: 100%; padding: .5rem .75rem; border: 0;
            border-radius: var(--radius-sm); background: none; color: var(--fg); font: inherit; cursor: pointer; text-align: start;
            &:hover { background: var(--surface-2); color: var(--heading); }
        }
        & .menu-langs { display: grid; grid-template-columns: 1fr 1fr; margin-top: .3rem; }
        & .menu-langs a { padding: .4rem .75rem; font-size: var(--step--1); }
    }
    .site-head.is-compact .site-menu .menu-extra { display: block; }
    @media (max-width: 22rem) {
        .brand { gap: .5rem; font-size: .92rem; }
    }

    /* kop van een pagina */
    .hero { max-width: 56rem; padding-top: .5rem; }
    .hero + section, .hero + .glossary, .hero + dl { margin-top: 2.75rem; }
    .eyebrow {
        display: inline-flex; align-items: center; gap: .5rem; margin-bottom: 1.25rem;
        padding: .3rem .8rem .3rem .6rem; border-radius: 999px;
        font-size: var(--step--1); font-weight: 560; color: var(--heading);
        background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); user-select: none;
        &::before { content: ""; inline-size: .5rem; block-size: .5rem; border-radius: 50%; background: var(--accent); }
    }
    .hero h1 {
        background: linear-gradient(115deg, var(--heading) 30%, color-mix(in oklch, var(--accent) 80%, var(--heading)) 75%, var(--accent-2));
        -webkit-background-clip: text; background-clip: text; color: transparent;
    }
    @media (prefers-contrast: more) { .hero h1 { background: none; color: var(--heading); } }
    .lead { font-size: var(--step-1); line-height: 1.6; color: var(--fg); max-width: 58ch; }
    .note {
        margin-top: 1.5rem; padding: .9rem 1.1rem; max-width: 58ch;
        background: var(--accent-soft); border: 1px solid color-mix(in oklch, var(--accent) 30%, transparent);
        border-radius: var(--radius); color: var(--fg);
    }
    .breadcrumb {
        margin-bottom: 1.4rem; font-size: var(--step--1); color: var(--muted); user-select: none;
        & a { color: var(--muted); text-decoration: none; &:hover { color: var(--heading); } }
    }
    .section-intro { color: var(--muted); max-width: var(--measure); }
    .site-main > section > p, .site-main > section > ul, .site-main > section > ol { max-width: var(--measure); }

    /* waarschuwing */
    .alert {
        position: relative; isolation: isolate;
        display: grid; grid-template-columns: auto 1fr; gap: .35rem 1.1rem;
        margin-top: 2.5rem; padding: 1.5rem 1.6rem .75rem;
        background: var(--warn-bg); color: var(--fg);
        border: 1px solid var(--warn-line); border-radius: var(--radius-lg);
        box-shadow: var(--shadow);
        & h2 { margin: 0 0 .45rem; font-size: var(--step-1); color: var(--heading); }
        & ol { padding-left: 1.2rem; }
        & li::marker { color: var(--warn-fg); font-weight: 700; }
        & a { color: var(--warn-fg); text-decoration-color: color-mix(in oklch, var(--warn-fg) 45%, transparent); font-weight: 560; }
        @media (max-width: 34rem) { grid-template-columns: 1fr; padding-inline: 1.15rem; }
    }
    /* uitlegschema (API-gids, ep_flow_html()): vier stappen naast elkaar als er ruimte is, anders onder elkaar */
    .flow {
        container-type: inline-size; margin: 0 0 2.5rem;
        & figcaption { margin-top: .4rem; max-width: var(--measure); color: var(--muted); font-size: var(--step--1); }
    }
    .flow-row {
        margin-bottom: .75rem; padding: 1rem 1.1rem 1.1rem;
        background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
        &.is-bad { border-color: var(--warn-line); background: color-mix(in oklch, var(--warn-bg) 55%, var(--surface)); }
        &.is-good { border-color: color-mix(in oklch, var(--ok) 50%, var(--line)); }
    }
    .flow-title { margin: 0 0 .75rem; color: var(--heading); font-weight: 650; font-size: var(--step--1); }
    .flow-steps {
        list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem;
        & li { margin: 0; min-width: 0; }
        & code { background: none; border: 0; padding: 0; font-size: .78rem; overflow-wrap: anywhere; }
    }
    .flow-node {
        display: flex; flex-direction: column; gap: .3rem; padding: .6rem .75rem;
        background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
    }
    .flow-label { color: var(--muted); font-size: .74rem; font-weight: 650; letter-spacing: .03em; }
    .flow-arrow, .flow-result {
        position: relative; display: flex; flex-direction: column; justify-content: center; gap: .2rem; padding: .35rem .75rem .35rem 1.7rem;
        &::before { content: "↓" / ""; position: absolute; left: .55rem; top: 50%; translate: 0 -50%; color: var(--accent); font-weight: 700; }
    }
    .flow-arrow code { color: var(--muted); }
    .flow-result {
        & code { font-weight: 700; font-size: .85rem; }
        & span { color: var(--fg); font-size: var(--step--1); line-height: 1.4; }
    }
    .is-bad .flow-result code { color: var(--warn-fg); }
    .is-good .flow-result code { color: var(--ok); }
    @container (min-width: 46rem) {
        .flow-steps { grid-template-columns: 1.35fr 1.05fr 1.1fr 1fr; align-items: stretch; }
        .flow-arrow::before, .flow-result::before { content: "→" / ""; }
    }

    .alert-icon {
        inline-size: 2.4rem; block-size: 2.4rem; padding: .5rem; border-radius: 12px;
        color: var(--warn-fg); background: color-mix(in oklch, var(--warn-line) 35%, transparent);
    }

    /* kaarten: bento-grid; kaarten met code over de volle breedte (:has) */
    .cards {
        container-type: inline-size;
        display: grid; gap: 1rem;
        grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
    }
    .card {
        min-width: 0; position: relative;
        padding: 1.5rem 1.5rem .75rem;
        background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        transition: border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
        &:has(pre) { grid-column: 1 / -1; }
        &:hover { border-color: var(--line-strong); box-shadow: var(--shadow); }
        & :is(h3, h4) a { color: var(--heading); text-decoration: none; &::after { content: ""; position: absolute; inset: 0; border-radius: inherit; } }
        &:has(:is(h3, h4) a):hover { transform: translateY(-2px); }
        &:has(:is(h3, h4) a:focus-visible) { outline: 2px solid var(--accent); outline-offset: 3px; }
        & :is(h3, h4) a:focus-visible { outline: none; }
        & p { max-width: none; }
    }
    @media (prefers-reduced-motion: reduce) { .card:has(:is(h3, h4) a):hover { transform: none; } }
    .card-tag {
        display: inline-block; margin-bottom: .8rem; padding: .22rem .65rem; border-radius: 999px;
        font: 600 .74rem/1.4 var(--font); letter-spacing: .02em; color: var(--accent-strong);
        background: var(--accent-soft); user-select: none;
    }

    /* fout voorbeeld / juiste vervanging */
    .snippet-label {
        display: flex; align-items: center; gap: .45rem; margin: .5rem 0 .55rem;
        font: 650 .74rem/1.4 var(--font); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); user-select: none;
        &.is-wrong::before, &.is-right::before {
            display: inline-grid; place-items: center; inline-size: 1.15rem; block-size: 1.15rem; border-radius: 50%;
            font-size: .7rem; letter-spacing: 0;
        }
        &.is-wrong::before { content: "✕" / ""; color: var(--bad); background: color-mix(in oklch, var(--bad) 14%, transparent); }
        &.is-right::before { content: "✓" / ""; color: var(--ok); background: var(--ok-soft); }
    }

    /* kopieerknop */
    /* omhulsel van site.js: de kopieerknop staat hierin, zodat hij niet meescrolt met lange regels */
    .code-block {
        position: relative; margin: 0 0 1.25rem; min-width: 0;
        & > pre { margin: 0; }
    }
    .copy {
        position: absolute; top: .3rem; right: .45rem;
        padding: .22rem .7rem; border-radius: 7px; cursor: pointer; user-select: none;
        font: 560 .74rem/1.4 var(--font); color: var(--muted);
        background: transparent; border: 1px solid transparent;
        &:hover { color: var(--heading); background: var(--surface); border-color: var(--line); }
        &.is-done, &.is-fail { display: inline-flex; align-items: center; gap: .35rem; background: var(--surface); }
        &.is-done { color: var(--ok); border-color: color-mix(in oklch, var(--ok) 45%, transparent); }
        &.is-fail { color: var(--warn-fg); border-color: var(--warn-line); }
        /* vinkje dat even opspringt */
        &.is-done::before {
            content: ""; inline-size: .8rem; block-size: .45rem; margin-top: -.2rem;
            border-left: 2px solid currentColor; border-bottom: 2px solid currentColor; rotate: -45deg;
            animation: ep-tick .32s var(--ease) both;
        }
    }
    @keyframes ep-tick { from { scale: 0; opacity: 0; } 60% { scale: 1.25; opacity: 1; } to { scale: 1; } }


    /* startknoppen onder de inleiding van de homepage: kies je situatie */
    .start {
        display: grid; gap: .6rem; margin: 1.6rem 0 0; max-width: 56rem;
        grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
        user-select: none;
    }
    .start-item {
        display: flex; align-items: center; gap: .75rem; min-height: 3.4rem; padding: .8rem 1rem;
        color: var(--heading); font-weight: 600; line-height: 1.3; text-decoration: none;
        background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
        box-shadow: var(--shadow-sm);
        transition: border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
        & svg { flex: none; padding: .45rem; inline-size: 2.2rem; block-size: 2.2rem; border-radius: 10px; color: var(--accent-strong); background: var(--accent-soft); }
        &:hover { color: var(--heading); border-color: var(--line-strong); box-shadow: var(--shadow); transform: translateY(-1px); }
        &.is-warn svg { color: var(--warn-fg); background: color-mix(in oklch, var(--warn-line) 30%, transparent); }
        &.is-warn:hover { border-color: var(--warn-line); }
    }
    @media (prefers-reduced-motion: reduce) { .start-item:hover { transform: none; } }

    /* hub: thema's met kaarten (homepage) en de bibliotheek (/guides) */
    .hub-group {
        margin-top: 2rem; scroll-margin-top: 6rem;
        & h3 { margin: 0 0 .25rem; font-size: var(--step-1); }
    }
    .hub-intro { margin: 0 0 1rem; color: var(--muted); max-width: var(--measure); }
    .hub-cards { grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr)); }
    /* 2 of 4 kaarten: twee kolommen (geen losse kaart of lege plek op de laatste rij) */
    .hub-cards:has(> .hub-card:nth-child(2):last-child), .hub-cards:has(> .hub-card:nth-child(4):last-child) {
        grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
    }
    .hub-card {
        display: flex; flex-direction: column; padding: 1.2rem 1.25rem .5rem;
        & :is(h3, h4) { margin: 0 0 .4rem; font-size: 1.02rem; line-height: 1.35; }
        & p:last-child { color: var(--muted); font-size: var(--step--1); }
        & .card-tag { align-self: flex-start; margin-bottom: .65rem; }
    }
    .hub-all {
        margin-top: 1.4rem;
        & a { font-weight: 600; }
        & a::after { content: " →" / ""; }
    }
    section[id^="topic-"] { scroll-margin-top: 6rem; }

    /* checklist */
    .checks {
        list-style: none; margin: 0; padding: .35rem 1.35rem; max-width: var(--measure);
        background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
        & li { position: relative; margin: 0; padding: .8rem 0 .8rem 2.1rem; border-bottom: 1px solid var(--line); }
        & li:last-child { border-bottom: 0; }
        & li::before {
            content: "✓" / ""; position: absolute; left: 0; top: .85rem;
            display: grid; place-items: center; inline-size: 1.35rem; block-size: 1.35rem; border-radius: 50%;
            font-size: .75rem; font-weight: 700; color: var(--ok); background: var(--ok-soft);
        }
    }

    .steps {
        counter-reset: step; list-style: none; padding: 0; margin: 0 0 1.1rem;
        & li { counter-increment: step; position: relative; margin: 0; padding: .1rem 0 .7rem 2.6rem; }
        & li::before {
            content: counter(step); position: absolute; left: 0; top: .1rem;
            display: grid; place-items: center; inline-size: 1.75rem; block-size: 1.75rem; border-radius: 50%;
            font: 700 .8rem/1 var(--font); color: var(--accent-strong); background: var(--accent-soft);
        }
    }

    /* tabellen */
    .table-scroll {
        overflow-x: auto; background: var(--surface);
        border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
    }
    .fix-table {
        inline-size: 100%; border-collapse: collapse; font-size: .92rem;
        & th, & td { text-align: left; vertical-align: top; padding: .9rem 1.05rem; border-bottom: 1px solid var(--line); }
        & thead th { background: var(--surface-2); color: var(--muted); font-size: .76rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; user-select: none; }
        & tbody th { color: var(--heading); font-weight: 620; min-inline-size: 9rem; }
        & td:nth-child(2) { color: var(--muted); min-inline-size: 11rem; }
        & td:last-child { min-inline-size: 16rem; }
        & tbody tr:last-child > * { border-bottom: 0; }
        & tbody tr:hover { background: color-mix(in oklch, var(--surface-2) 55%, transparent); }
    }

    /* vragen en bronnen */
    .faq { display: grid; gap: .65rem; max-width: 60rem; }
    .faq-item {
        padding: 1.2rem 1.4rem .4rem; background: var(--surface);
        border: 1px solid var(--line); border-radius: var(--radius-lg);
        & h3 { font-size: var(--step-0); margin-bottom: .4rem; }
    }
    .sources {
        list-style: none; padding: 0; max-width: var(--measure);
        & li { margin: 0; padding: .55rem 0; border-bottom: 1px dashed var(--line); }
        & li:last-child { border-bottom: 0; }
    }
    .src-pub { display: block; color: var(--muted); font-size: var(--step--1); }

    /* inhoudsopgave */
    .toc {
        padding-top: 2.5rem; font-size: var(--step--1); user-select: none;
        & summary { color: var(--muted); font-size: .72rem; font-weight: 650; letter-spacing: .09em; text-transform: uppercase; cursor: pointer; margin-bottom: .7rem; }
        & ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
        & li { margin: 0; }
        & a {
            display: block; padding: .38rem .75rem .38rem 1rem; margin-left: -1px;
            border-left: 2px solid transparent; color: var(--muted); text-decoration: none;
            &:hover { color: var(--heading); }
            &[aria-current="true"] { color: var(--accent-strong); border-left-color: var(--accent); font-weight: 600; }
        }
    }
    @media (min-width: 64rem) {
        .toc details { position: sticky; top: 5.5rem; }
        .toc summary { pointer-events: none; list-style: none; &::-webkit-details-marker { display: none; } }
    }
    @media (max-width: 63.99rem) {
        .toc { padding-top: 1.5rem; }
        .layout .site-main { padding-top: 1.75rem; }
        .toc details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1rem; }
        .toc summary { margin: 0; }
        .toc details[open] summary { margin-bottom: .6rem; }
    }

    .skip-link {
        position: absolute; left: -999px; top: .75rem; z-index: 50; padding: .5rem .9rem;
        background: var(--surface); color: var(--heading); border: 2px solid var(--accent); border-radius: var(--radius-sm);
        &:focus { left: .75rem; }
    }
}

/* ---------- inhoudspagina's ---------- */
@layer pages {
    .timeline {
        list-style: none; margin: 0 0 1.25rem; padding: 0 0 0 1.6rem; max-width: var(--measure);
        border-left: 2px solid color-mix(in oklch, var(--accent) 30%, var(--line));
        & li { position: relative; margin: 0 0 1.35rem; }
        & li::before {
            content: ""; position: absolute; left: -2.05rem; top: .5rem; inline-size: .8rem; block-size: .8rem; border-radius: 50%;
            background: var(--surface); border: 2px solid var(--accent); box-shadow: 0 0 0 4px var(--bg);
        }
    }
    .glossary {
        margin: 0; max-width: 60rem; background: var(--surface);
        border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: 0 1.5rem;
        & dt { padding-top: 1.2rem; color: var(--heading); font-weight: 650; }
        & dd { margin: .3rem 0 0; padding-bottom: 1.2rem; border-bottom: 1px solid var(--line); }
        & dd:last-child { border-bottom: 0; }
        & dt:target { color: var(--accent-strong); }
    }
    h2[id], section[id], article[id], details[id], dt[id] { scroll-margin-top: 5.5rem; }
}

/* ---------- hulpklassen en beweging ---------- */
@layer utilities {
    .visually-hidden {
        position: absolute !important; inline-size: 1px; block-size: 1px; margin: -1px; padding: 0;
        overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
    }
    @keyframes ep-grow { to { transform: scaleX(1); } }
    @keyframes ep-pulse {
        0% { box-shadow: 0 0 0 0 color-mix(in oklch, var(--warn-line) 55%, transparent); }
        70%, 100% { box-shadow: 0 0 0 .55rem transparent; }
    }
    /* vloeiende overgang tussen pagina's (View Transitions, alleen same-origin) */
    @view-transition { navigation: auto; }
    ::view-transition-old(root), ::view-transition-new(root) { animation-duration: .22s; animation-timing-function: var(--ease); }
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
        @view-transition { navigation: none; }
    }
    @media (forced-colors: active) {
        .lang-menu a[aria-current], .toc a[aria-current], .site-nav a[aria-current] { outline: 2px solid Highlight; }
        .copy, .lang-btn, .menu-theme, .hv-toggle, .start-item { border: 1px solid ButtonText; }
    }
    @media print {
        .site-head, .progress, .toc, .copy, .lang-menu, .site-foot .lang-nav, body::before, .hero-visual { display: none !important; }
        body { background: #fff; color: #000; }
        .hero h1 { background: none; color: #000; }
    }
}

@layer pages {
    /* Statistieken (/stats, alleen eigen IP's) */
    body.is-wide .site-main { padding-top: 1.5rem; }
    .st-bar { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; margin: 0 0 1.5rem; user-select: none; }
    .st-bar a, .st-bar span { font-size: .9rem; padding: .25rem .7rem; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; }
    .st-bar a.is-on { background: var(--fg); color: var(--bg); border-color: var(--fg); }
    .st-bar .st-filter { color: var(--muted); }
    .st-bar .st-sep { width: 1px; align-self: stretch; padding: 0; border: 0; background: var(--line); }
    .st-note { font-size: .85rem; max-width: 70ch; margin: -1rem 0 1.5rem; }
    .st-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 1rem; margin: 0 0 2rem; }
    .st-tile { border: 1px solid var(--line); border-radius: 10px; padding: .9rem 1rem; }
    .st-tile b { display: block; font-size: 1.6rem; line-height: 1.2; font-variant-numeric: tabular-nums; }
    .st-tile span { color: var(--muted); font-size: .85rem; user-select: none; }
    .st-chart { position: relative; display: flex; align-items: flex-end; gap: 2px; height: 160px; margin: 0 0 .4rem; border-bottom: 1px solid var(--line); }
    .st-chart .col { flex: 1 1 0; min-width: 2px; height: 100%; display: flex; align-items: flex-end; position: relative; }
    .st-chart .col i { display: block; width: 100%; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 1px; }
    .st-chart .col:hover i, .st-chart .col:focus i { opacity: .7; }
    .st-chart .col .tip { display: none; position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%); white-space: nowrap;
        background: var(--fg); color: var(--bg); font-size: .8rem; padding: .3rem .55rem; border-radius: 6px; z-index: 2; pointer-events: none; }
    .st-chart .col:hover .tip, .st-chart .col:focus .tip { display: block; }
    .st-axis { display: flex; justify-content: space-between; color: var(--muted); font-size: .8rem; margin: 0 0 2rem; user-select: none; }
    .st-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(22rem, 1fr)); gap: 2rem; }
    .st-grid h2, .st-wide h2 { font-size: 1.05rem; margin: 0 0 .6rem; }
    .st-wide { margin-top: 2rem; }
    .st-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
    .st-table th { text-align: left; color: var(--muted); font-weight: 500; padding: .35rem .5rem; border-bottom: 1px solid var(--line); user-select: none; }
    .st-table td { padding: .35rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; overflow-wrap: anywhere; }
    .st-table td.num, .st-table th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
    .st-table td.nowrap { white-space: nowrap; }
    .st-scroll { overflow-x: auto; }
    .st-muted { color: var(--muted); }
    .st-pre { background: var(--code-bg); border-radius: 8px; padding: .8rem 1rem; overflow-x: auto; font-size: .82rem; white-space: pre-wrap; overflow-wrap: anywhere; margin: 0; }
    details.st-data { margin: 0 0 2rem; }
    details.st-data summary { cursor: pointer; color: var(--muted); font-size: .85rem; user-select: none; }
}