/* ============================================================================
   Anker — designsysteem voor de marketingsite (site.css)
   Gedeeld door alle publieke pagina's. Same-origin, geen CDN, geen fonts van
   buiten. Liquid Glass als progressive enhancement over een kalme basis.
   Zie docs/website-plan.md.
   ============================================================================ */

/* ---- Tokens: donker (default) ---------------------------------------------- */
:root {
  --nacht:#171b1e; --laag:#1e252a; --laag2:#242c32; --rand:#2f3940;
  --bot:#e6e9e8; --gedempt:#a4b0b7; --gedempt2:#83919a;
  --warm:#e8b04b; --warm-diep:#b8873a; --koel:#5aa8b0; --koel-diep:#3d7a80;

  --cta-bg:var(--warm); --cta-fg:#171b1e;

  --glass-bg:rgba(30,37,42,.36);
  --glass-solid:#222a30;
  --glass-border:rgba(230,233,232,.16);
  --glass-sheen:rgba(255,255,255,.14);
  --glass-shadow:0 10px 34px -14px rgba(0,0,0,.7);
  --bloom-warm:rgba(232,176,75,.26);
  --bloom-koel:rgba(90,168,176,.22);

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, sans-serif;
  --r:8px; --r-lg:14px; --r-xl:22px;

  color-scheme: dark;
}

/* ---- Tokens: licht --------------------------------------------------------- */
/* Twee keer: één keer voor "systeem is licht en geen expliciete keuze", één
   keer voor de expliciete toggle-keuze. Plain CSS heeft geen mixins. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --nacht:#f5f3ee; --laag:#ffffff; --laag2:#ecebe4; --rand:#ded9cf;
    --bot:#1b2126; --gedempt:#55616a; --gedempt2:#5c6870;
    --warm:#e8b04b; --warm-diep:#a9761f; --koel:#266e75; --koel-diep:#3d7a80;
    --cta-bg:var(--warm); --cta-fg:#171b1e;
    --glass-bg:rgba(255,255,255,.55);
    --glass-solid:#ffffff;
    --glass-border:rgba(20,26,32,.12);
    --glass-sheen:rgba(255,255,255,.85);
    --glass-shadow:0 10px 30px -14px rgba(31,41,51,.28);
    --bloom-warm:rgba(232,176,75,.32);
    --bloom-koel:rgba(38,110,117,.17);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --nacht:#f5f3ee; --laag:#ffffff; --laag2:#ecebe4; --rand:#ded9cf;
  --bot:#1b2126; --gedempt:#55616a; --gedempt2:#5c6870;
  --warm:#e8b04b; --warm-diep:#a9761f; --koel:#266e75; --koel-diep:#3d7a80;
  --cta-bg:var(--warm); --cta-fg:#171b1e;
  --glass-bg:rgba(255,255,255,.55);
  --glass-solid:#ffffff;
  --glass-border:rgba(20,26,32,.12);
  --glass-sheen:rgba(255,255,255,.85);
  --glass-shadow:0 10px 30px -14px rgba(31,41,51,.28);
  --bloom-warm:rgba(232,176,75,.32);
  --bloom-koel:rgba(38,110,117,.17);
  color-scheme: light;
}

/* ---- Reset + responsieve fundamenten -------------------------------------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
img, svg, video { max-width: 100%; }
h1, h2, h3 { text-wrap: balance; }

body {
  min-height: 100dvh;
  color: var(--bot);
  font-family: var(--sans);
  line-height: 1.6;
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
  background: var(--nacht);
  transition: background-color .3s ease, color .3s ease;
}
/* De atmosfeer: langzaam driftende, zwaar-geblurde lichtpoelen als vaste laag
   achter de content, zodat het glas iets levends heeft om te breken. Puur CSS —
   transform + opacity (GPU-versneld), geen JS. Versprongen cycli, dus het
   herhaalt nooit zichtbaar. Bij prefers-reduced-motion bevriezen de blobs tot
   een rustig statisch lichtbeeld. Bron: aurora/mesh-gradient best practice 2026. */
.aurora { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.aurora span {
  position: absolute; display: block; border-radius: 50%;
  filter: blur(62px) saturate(150%); will-change: transform;
}
/* Kalm voor ADHD: heel traag, kleine beweging, iets zachter licht — beweging
   mag de aandacht niet wegtrekken van de tekst (bron: ADHD-UX best practice).
   Bij prefers-reduced-motion staat het volledig stil (zie onderaan). */
.aurora .b1 { width: 62vmax; height: 62vmax; left: -6vmax; top: -16vmax;
  background: radial-gradient(circle, color-mix(in srgb, var(--warm) 46%, transparent), transparent 62%);
  animation: drift-a 90s ease-in-out infinite alternate; }
.aurora .b2 { width: 56vmax; height: 56vmax; right: -8vmax; top: -8vmax;
  background: radial-gradient(circle, color-mix(in srgb, var(--koel) 46%, transparent), transparent 62%);
  animation: drift-b 110s ease-in-out infinite alternate; }
.aurora .b3 { width: 58vmax; height: 58vmax; left: 18%; bottom: -22vmax;
  background: radial-gradient(circle, color-mix(in srgb, var(--warm) 40%, transparent), transparent 62%);
  animation: drift-c 100s ease-in-out infinite alternate; }
@keyframes drift-a { from { transform: translate(0,0) scale(1); }    to { transform: translate(7vmax, 5vmax) scale(1.06); } }
@keyframes drift-b { from { transform: translate(0,0) scale(1.03); } to { transform: translate(-6vmax, 6vmax) scale(.98); } }
@keyframes drift-c { from { transform: translate(0,0) scale(1); }    to { transform: translate(5vmax, -5vmax) scale(1.05); } }
@media (prefers-reduced-motion: reduce) { .aurora span { animation: none; } }

::selection { background: var(--warm); color: #171b1e; }
:focus-visible { outline: 2px solid var(--warm); outline-offset: 3px; border-radius: 4px; }

.wrap {
  max-width: 660px; margin-inline: auto;
  padding-inline: calc(22px + env(safe-area-inset-left, 0px)) calc(22px + env(safe-area-inset-right, 0px));
}
.wrap--wide { max-width: 1080px; }

/* ---- Typografie ------------------------------------------------------------ */
.eyebrow {
  font-family: var(--mono); font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--gedempt2); display: block; margin-bottom: 10px;
}
h1 { font-size: clamp(30px, 6vw, 44px); font-weight: 600; letter-spacing: -.02em; line-height: 1.15; }
h2 { font-size: clamp(20px, 3.4vw, 23px); font-weight: 600; letter-spacing: -.015em; line-height: 1.3; }
h3 { font-size: 16px; font-weight: 600; letter-spacing: -.01em; }
.lead { font-size: clamp(16px, 2.4vw, 18px); color: var(--gedempt); }

a { color: var(--koel); }

/* ---- Het glasmateriaal ----------------------------------------------------- */
/* Fallback-eerst: een solide, leesbare kaart. Verrijk alleen waar het kan. */
.glass {
  background: var(--glass-solid);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-sheen);
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass {
    /* frosted fill + een diagonale specular sheen linksboven (het "licht op glas") */
    background:
      linear-gradient(150deg, color-mix(in srgb, var(--glass-sheen) 70%, transparent), transparent 44%),
      var(--glass-bg);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    backdrop-filter: blur(14px) saturate(160%);
  }
}
/* Tekstrijk vlak: hogere dekking zodat contrast nooit wegzakt over een gloed. */
.glass--dense { background: color-mix(in srgb, var(--glass-solid) 82%, transparent); }
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass--dense {
    background: color-mix(in srgb, var(--glass-solid) 78%, transparent);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    backdrop-filter: blur(16px) saturate(140%);
  }
}

/* De echte lens: SVG-displacement als backdrop-filter. Alleen Chromium rendert
   dit; Safari/Firefox houden de frosted glass hierboven. Nooit onder tekst. */
@media (prefers-reduced-motion: no-preference) {
  @supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .glass--lens {
      -webkit-backdrop-filter: url(#anker-lens) blur(9px) saturate(150%);
      backdrop-filter: url(#anker-lens) blur(9px) saturate(150%);
      will-change: backdrop-filter;
    }
  }
}

/* Reduced-transparency: kalmer (meer dekking), maar nog steeds glas — zodat het
   zichtbaar blijft, ook als Windows-transparantie uit staat. De blur blijft. */
@media (prefers-reduced-transparency: reduce) {
  .glass, .glass--dense {
    background: color-mix(in srgb, var(--glass-solid) 68%, transparent);
  }
}

/* ---- Navigatie (sticky glass) --------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 16px;
  padding: 10px clamp(14px, 4vw, 26px);
  padding-inline: max(14px, env(safe-area-inset-left)) max(14px, env(safe-area-inset-right));
  border: 0; border-bottom: 1px solid var(--glass-border);
  border-radius: 0;
  box-shadow: 0 6px 24px -18px rgba(0,0,0,.7);
  will-change: backdrop-filter;
}
.nav__brand { font-weight: 600; letter-spacing: -.01em; color: var(--bot); text-decoration: none; margin-right: auto; }
.nav__links { display: flex; gap: 4px; flex-wrap: wrap; }
.nav__links a {
  color: var(--gedempt); text-decoration: none; font-size: 13.5px;
  padding: 6px 10px; border-radius: var(--r); transition: color .15s, background .15s;
}
.nav__links a:hover { color: var(--bot); background: color-mix(in srgb, var(--bot) 8%, transparent); }
.nav__links a[aria-current="page"] { color: var(--bot); }

/* ---- Mobiel menu: JS-vrije disclosure (<details>) -------------------------- */
/* Op desktop tonen we de inline-links en verbergen we dit menu; onder 640px
   precies andersom. Geen script — <details> is native HTML. */
.nav-menu { display: none; position: relative; }
.nav-menu > summary {
  list-style: none; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; flex-shrink: 0;
  border: 1px solid var(--glass-border); border-radius: var(--r);
  color: var(--bot);
}
.nav-menu > summary::-webkit-details-marker { display: none; }
.nav-menu > summary:hover,
.nav-menu[open] > summary { background: color-mix(in srgb, var(--bot) 8%, transparent); }
.nav-menu__panel {
  position: absolute; right: 0; top: calc(100% + 10px);
  min-width: 224px; padding: 8px; display: grid; gap: 2px;
  border-radius: var(--r-lg);
}
.nav-menu__panel a {
  color: var(--gedempt); text-decoration: none; font-size: 15px;
  padding: 11px 12px; border-radius: var(--r);
}
.nav-menu__panel a:hover { color: var(--bot); background: color-mix(in srgb, var(--bot) 8%, transparent); }
.nav-menu__panel a[aria-current="page"] { color: var(--bot); }

@media (max-width: 640px) {
  .nav__links { display: none; }
  .nav-menu { display: block; }
}

/* ---- Knoppen --------------------------------------------------------------- */
.cta {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 24px;
  background: var(--cta-bg); color: var(--cta-fg);
  border: 1px solid var(--cta-bg); border-radius: var(--r);
  font: inherit; font-size: 15.5px; font-weight: 600; text-decoration: none;
  transition: filter .15s, transform .05s;
}
.cta:hover { filter: brightness(.94); }
.cta:active { transform: translateY(1px); }

.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px;
  color: var(--bot); border-radius: var(--r);
  font: inherit; font-size: 14.5px; font-weight: 600; text-decoration: none;
  border: 1px solid var(--glass-border);
}

/* ---- Kaart / sectie -------------------------------------------------------- */
.card { padding: clamp(18px, 4vw, 24px); }
.card .eyebrow { margin-bottom: 8px; }

/* ---- Het app-beeld (telefoon) --------------------------------------------- */
.phone {
  max-width: 300px; margin-inline: auto;
  border-radius: 34px; padding: 12px;
}
.phone-screen {
  /* Glas, geen massief vlak — maar dense genoeg dat de tekst leesbaar blijft. */
  background: color-mix(in srgb, var(--laag) 78%, transparent);
  border: 1px solid var(--glass-border);
  border-radius: 22px; padding: 22px 17px 24px;
}
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .phone-screen {
    background: color-mix(in srgb, var(--laag) 66%, transparent);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
    backdrop-filter: blur(10px) saturate(140%);
  }
}
.phone-brand { font-family: var(--mono); font-size: 10px; letter-spacing: .16em; text-transform: uppercase; color: var(--gedempt2); margin-bottom: 18px; }
.phone-kicker { font-size: 15px; font-weight: 600; margin-bottom: 3px; }
.phone-sub { font-size: 13px; color: var(--gedempt); margin-bottom: 15px; }
.phone-task { border-left: 2px solid var(--koel); padding-left: 12px; font-size: 15.5px; color: var(--bot); font-weight: 500; margin-bottom: 20px; }
.phone-timer { display: flex; align-items: baseline; gap: 11px; }
.phone-timer .count { font-family: var(--mono); font-size: 32px; font-weight: 600; letter-spacing: -.02em; color: var(--warm); font-variant-numeric: tabular-nums; }
.phone-timer .note { font-size: 12px; color: var(--gedempt); line-height: 1.4; }

/* ---- Prose (onderwerp-pagina's) ------------------------------------------- */
.prose { max-width: 62ch; }
.prose p { color: var(--gedempt); margin-bottom: 14px; }
.prose p:last-child { margin-bottom: 0; }
.prose em { color: var(--bot); font-style: normal; font-weight: 500; }
.prose h2 { margin: 30px 0 12px; }
.does { border-left: 2px solid var(--koel); padding-left: 13px; margin: 16px 0; color: var(--bot); font-size: 15px; }
.does b { font-weight: 600; }

/* ---- Breadcrumb ------------------------------------------------------------ */
.breadcrumb { font-size: 12.5px; color: var(--gedempt2); margin-bottom: 18px; }
.breadcrumb a { color: var(--gedempt); text-decoration: none; }
.breadcrumb a:hover { color: var(--bot); }

/* ---- FAQ ------------------------------------------------------------------- */
.faq h3 { margin: 24px 0 6px; color: var(--bot); }
.faq h3:first-of-type { margin-top: 6px; }
.faq p { color: var(--gedempt); max-width: 58ch; }

/* ---- Verwante pagina's (topic cluster) ------------------------------------ */
.related { margin-top: 44px; }
.related-grid { display: grid; gap: 8px; margin-top: 14px; }
.related-grid a { display: block; padding: 14px 16px; border-radius: var(--r-lg); color: var(--bot); text-decoration: none; font-weight: 600; font-size: 14.5px; }
.related-grid a span { display: block; font-weight: 400; font-size: 13px; color: var(--gedempt); margin-top: 2px; }
.related-grid a:hover { border-color: var(--koel); }

/* ---- Footer ---------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--rand); padding-block: 40px calc(48px + env(safe-area-inset-bottom, 0px)); margin-top: 20px; }
.site-footer p { color: var(--gedempt2); font-size: 12.5px; max-width: 62ch; margin-bottom: 9px; }
.site-footer a { color: var(--gedempt); }

/* ---- Thema-toggle ---------------------------------------------------------- */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; flex-shrink: 0;
  border: 1px solid var(--glass-border); border-radius: var(--r);
  background: transparent; color: var(--bot); cursor: pointer;
}
.theme-toggle:hover { background: color-mix(in srgb, var(--bot) 8%, transparent); }
.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: block; }
:root[data-theme="light"] .theme-toggle .sun,
:root:not([data-theme="dark"]) .theme-toggle .sun { display: block; }
:root[data-theme="light"] .theme-toggle .moon,
:root:not([data-theme="dark"]) .theme-toggle .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: block; }
}

/* ============================================================================
   Interactieve verrijking — progressive enhancement (docs/website-plan.md §1:
   de site verleidt, /app blijft rustig). Geen JavaScript. Alles degradeert
   netjes en staat volledig stil onder prefers-reduced-motion.
   ============================================================================ */

/* (1) Zachte overgang tussen de pagina's — cross-document view transitions.
   Chromium vloeit over; andere browsers navigeren gewoon hard, zoals nu. */
@view-transition { navigation: auto; }
@media (prefers-reduced-motion: reduce) { @view-transition { navigation: none; } }

/* (3) De vier ingangen: hover/focus op één kaart dimt de andere drie zacht.
   Toestandswissel, geen keyframe. Muis én toetsenbord. In browsers zonder
   :has() gebeurt er niets — de kaarten werken gewoon. */
.four:has(a:hover) a:not(:hover),
.four:has(a:focus-visible) a:not(:focus-visible) { opacity: .5; filter: saturate(.7); }

/* (2) De teller in het telefoon-beeld telt in ~4s eenmalig af van 2:00 naar 0:00
   (@property + CSS-counters, geen script) en blijft dan op 0:00 staan. Bewust
   < 5s: langer auto-bewegend zou WCAG 2.2.2 een pauzeknop vereisen, en die kan
   niet zonder JS. Onder reduced-motion of in oudere browsers blijft "2:00" staan. */
@property --cd-m { syntax: "<integer>"; inherits: false; initial-value: 2; }
@property --cd-s { syntax: "<integer>"; inherits: false; initial-value: 0; }
@media (prefers-reduced-motion: no-preference) {
  .phone-timer .count-fallback { display: none; }
  .phone-timer .count {
    counter-reset: cdm var(--cd-m) cds var(--cd-s);
    animation: countdown 4s step-end forwards;
  }
  .phone-timer .count::after { content: counter(cdm) ":" counter(cds, decimal-leading-zero); }
  @keyframes countdown {
    0%    { --cd-m: 2; --cd-s: 0;  }
    12.5% { --cd-m: 1; --cd-s: 45; }
    25%   { --cd-m: 1; --cd-s: 30; }
    37.5% { --cd-m: 1; --cd-s: 15; }
    50%   { --cd-m: 1; --cd-s: 0;  }
    62.5% { --cd-m: 0; --cd-s: 45; }
    75%   { --cd-m: 0; --cd-s: 30; }
    87.5% { --cd-m: 0; --cd-s: 15; }
    100%  { --cd-m: 0; --cd-s: 0;  }
  }
}

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }