/* Trapwise v3, hero. Tokens uit DESIGN.md v3; --blue (#68D5EA) is op 13-09 gemeten uit het
   neon-brein (brand/brein-neon.png). NIET uit brand/trapwise-icon.png: dat bestand draagt het
   vervallen #0000FF en wordt sinds 13-09 niet meer gedeployed. */

:root {
  --bg: #000000;
  --surface: #0B0B0E;
  --surface-2: #131318;
  --line: #22222A;
  --text: #FFFFFF;
  --dim: #A6A6B0;
  --dim-2: #6E6E78;
  --blue: #68D5EA;
  --blue-glow: #BDEEF8;
  --blue-deep: #06507F;

  /* Neon-tokens, gemeten uit het brein-icoon (brand/brein-neon.png, Dominic 13-09). */
  --neon: #68D5EA;
  --neon-licht: #BDEEF8;
  --neon-diep: #06507F;

  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", Menlo, monospace;

  --gutter: 72px;
  --max-width: 1360px;
  --nav-h: 72px;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: rgba(0, 0, 0, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}
.brand img {
  display: block;
  width: 28px;
  height: 28px;
  filter: drop-shadow(0 0 6px rgba(104, 213, 234, 0.75));
}
.wm {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-variation-settings: "wdth" 125;
}
/* .AI in de wordmark: gevuld in merkblauw met een zachte gloed.
   Dominic heeft 13-09 op de live site drie versies naast elkaar gezien (gevuld dieper met
   contour, open letters, en deze) en koos deze. Niet stilzwijgend "verbeteren" naar de
   contourversie uit het logo: dat is bekeken en afgewezen. Zie DESIGN.md. */
.wm .ai { color: var(--neon); text-shadow: 0 0 10px rgba(104,213,234,.45); }

/* ---------- Button: afgeschuinde hoeken, gloed, lichtstreep, HUD-hoekjes ----------
   De buitenste laag draagt de gloed (drop-shadow volgt de afgeschuinde vorm), de binnenste span is de vorm zelf. */
.btn {
  --btn-h: 54px;
  --btn-px: 28px;
  --btn-cut: 11px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--btn-h);
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  filter: drop-shadow(0 0 14px rgba(104, 213, 234, 0.45)) drop-shadow(0 6px 18px rgba(104, 213, 234, 0.25));
  transition: filter 220ms ease, transform 220ms ease;
}
.btn > span {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 100%;
  padding: 0 var(--btn-px);
  /* Parelmoer: donkerblauwe kern, glansstrook bovenin, licht van onderaf (overgenomen van de pearl-button, in ons blauw).
     13-09: een tint dieper na de kleuromslag. Wit op de oude bovenkant #3FC4E0 gaf 2,06:1; nu 3,53:1 en de
     onderkant landt op --blue-deep. Hover schuift mee, dus de knop licht nog steeds op. */
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.30) 0%, rgba(255, 255, 255, 0.06) 42%, rgba(0, 0, 0, 0) 50%),
    linear-gradient(180deg, #1A93BC 0%, #0C7A9E 60%, #06507F 100%);
  box-shadow:
    inset 0 0.3rem 0.9rem rgba(255, 255, 255, 0.28),
    inset 0 -0.1rem 0.3rem rgba(0, 0, 0, 0.7),
    inset 0 -0.4rem 0.9rem rgba(189, 238, 248, 0.55),
    inset 0 10px 8px -10px rgba(255, 255, 255, 0.8);
  clip-path: polygon(var(--btn-cut) 0, 100% 0, 100% calc(100% - var(--btn-cut)), calc(100% - var(--btn-cut)) 100%, 0 100%, 0 var(--btn-cut));
  overflow: hidden;
  transition: background 220ms ease, box-shadow 220ms ease;
}
/* Koepel van licht die bij hover omhoog schuift (pearl-button ::before) */
.btn > span::before {
  content: "";
  position: absolute;
  left: -15%;
  right: -15%;
  top: -100%;
  bottom: 25%;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  transition: transform 300ms ease;
  pointer-events: none;
}
.btn:hover > span::before { transform: translateY(-5%); }
/* Tekst en pijl: lopen onderaan zacht weg, komen bij hover iets omhoog */
.btn .label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transform: translateY(2%);
  transition: transform 220ms ease;
  -webkit-mask-image: linear-gradient(to bottom, #fff 55%, rgba(255, 255, 255, 0.45));
          mask-image: linear-gradient(to bottom, #fff 55%, rgba(255, 255, 255, 0.45));
}
.btn:hover .label { transform: translateY(-6%); }
/* Sterretje: ✧ in rust, ✦ bij hover */
.btn .spark { display: inline-block; width: 1em; text-align: center; font-size: 15px; line-height: 1; opacity: 0.85; }
.btn .spark i:nth-child(2) { display: none; }
.btn:hover .spark i:nth-child(1) { display: none; }
.btn:hover .spark i:nth-child(2) { display: inline; }
.btn .spark i { font-style: normal; }
/* Lichtstreep die over de knop loopt */
.btn > span::after {
  content: "";
  position: absolute;
  top: -40%;
  left: -60%;
  width: 45%;
  height: 180%;
  background: linear-gradient(105deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.28) 45%, rgba(200, 240, 250,0.55) 50%, rgba(255,255,255,0.28) 55%, rgba(255,255,255,0) 100%);
  transform: translateX(0) skewX(-12deg);
  pointer-events: none;
}
.btn:hover > span::after,
.btn:focus-visible > span::after { animation: sweep 700ms cubic-bezier(0.2, 0.7, 0.2, 1) forwards; }
.btn-hero > span::after { animation: sweep 900ms cubic-bezier(0.2, 0.7, 0.2, 1) 1.6s 1 forwards, sweep-idle 7s linear 4s infinite; }
@keyframes sweep { from { transform: translateX(0) skewX(-12deg); } to { transform: translateX(420%) skewX(-12deg); } }
@keyframes sweep-idle { 0% { transform: translateX(0) skewX(-12deg); } 14% { transform: translateX(420%) skewX(-12deg); } 100% { transform: translateX(420%) skewX(-12deg); } }
/* HUD-hoekjes: twee kleine haken in blauw-glow, buiten de vorm */
.btn::before,
.btn::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--blue-glow);
  opacity: 0.85;
  pointer-events: none;
  transition: transform 220ms ease, opacity 220ms ease;
}
.btn::before { left: -5px; top: -5px; border-right: 0; border-bottom: 0; }
.btn::after { right: -5px; bottom: -5px; border-left: 0; border-top: 0; }
.btn:hover::before { transform: translate(-2px, -2px); opacity: 1; }
.btn:hover::after { transform: translate(2px, 2px); opacity: 1; }
/* Pijl die meebeweegt */
.btn .arrow {
  display: inline-block;
  width: 14px;
  height: 14px;
  flex: none;
  transition: transform 220ms ease;
}
.btn:hover .arrow { transform: translateX(4px); }
.btn:hover {
  transform: translateY(-1px);
  filter: drop-shadow(0 0 22px rgba(104, 213, 234, 0.7)) drop-shadow(0 8px 24px rgba(104, 213, 234, 0.35));
}
.btn:hover > span {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0.04) 42%, rgba(0, 0, 0, 0) 50%),
    linear-gradient(180deg, #3FC4E0 0%, #1A93BC 60%, #0B6E93 100%);
  box-shadow:
    inset 0 0.3rem 0.5rem rgba(255, 255, 255, 0.4),
    inset 0 -0.1rem 0.3rem rgba(0, 0, 0, 0.7),
    inset 0 -0.4rem 0.9rem rgba(160, 225, 240, 0.75),
    inset 0 10px 8px -10px rgba(255, 255, 255, 0.5);
}
.btn:active { transform: translateY(3px); filter: drop-shadow(0 0 8px rgba(104, 213, 234, 0.5)); }
.btn:active > span {
  box-shadow:
    inset 0 0.3rem 0.5rem rgba(255, 255, 255, 0.5),
    inset 0 -0.1rem 0.3rem rgba(0, 0, 0, 0.8),
    inset 0 -0.4rem 0.9rem rgba(189, 238, 248, 0.4);
}
.btn:focus-visible { outline: 2px solid var(--blue-glow); outline-offset: 4px; }
.btn-nav { --btn-h: 44px; --btn-px: 20px; --btn-cut: 9px; font-size: 15px; }
.btn-nav::before, .btn-nav::after { width: 6px; height: 6px; }

@media (prefers-reduced-motion: reduce) {
  .btn, .btn > span, .btn > span::before, .btn::before, .btn::after, .btn .arrow, .btn .label { transition: none; }
  .btn > span::after, .btn-hero > span::after { animation: none; display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  margin-top: calc(-1 * var(--nav-h));
  padding-top: var(--nav-h);
  overflow: hidden;
  background: var(--bg);
}
/* Desktop: het brein-vlak is het hele hero-vlak, de kop staat erbovenop. */
.brain-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
}
#brain-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.hero-inner {
  position: static;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: calc(100svh - var(--nav-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-copy { position: relative; z-index: 1; max-width: 820px; }

h1 {
  margin: 0 0 32px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(52px, 8.6vw, 124px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  font-variation-settings: "wdth" 110;
  text-wrap: balance;
}
h1 .line { display: block; }
h1 .accent {
  color: var(--blue);
  text-shadow: 0 0 56px rgba(189, 238, 248, 0.45);
}

.lead {
  margin: 0 0 40px;
  max-width: 620px;
  font-size: 21px;
  line-height: 1.45;
  color: var(--dim);
}
.cta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-note {
  margin: 0;
  max-width: 360px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--dim);
}

/* Statisch brein: reduced-motion, trage toestellen, of als WebGL faalt */
.brain-still {
  display: none;
  position: absolute;
  pointer-events: none;
}
.brain-still img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 60px rgba(104, 213, 234, 0.45));
}
.brain-still::before {
  content: "";
  position: absolute;
  inset: -40%;
  /* Blauw-diep uit de canon (#06507F). Stond tot 13-09 op rgba(10,10,180) = het vervallen
     #0A0AB4; als rgb-waarde ontsnapte dat aan de tokencontrole. */
  background: radial-gradient(circle at 50% 50%, rgba(6, 80, 127, 0.55) 0%, rgba(6, 80, 127, 0.18) 35%, rgba(0, 0, 0, 0) 68%);
  z-index: -1;
}
.hero.is-still #brain-canvas { display: none; }
.hero.is-still .brain-still {
  display: block;
  top: 50%;
  right: var(--gutter);
  width: min(30vw, 420px);
  transform: translateY(-50%);
}

/* De bouwnotitie (.dev-note) is op 13-09 verwijderd. Hij kwam mee met de hero-v3 op 11-09
   (7c21e0a) en stond sindsdien zichtbaar op productie, met de tekst dat de site onaf was.
   Zet hier geen werknotities meer neer: die horen in de handoff of in Status.md. */

/* ---------- Binnenkomst: één keer, daarna stil ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  animation: rise 900ms cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
  animation-delay: calc(120ms + var(--d, 0) * 110ms);
}
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; opacity: 1; transform: none; }
}

/* ---------- Mobiel: het brein-vlak is een vierkant boven de kop; 3D-lite, still als vangnet ---------- */
@media (max-width: 767px) {
  :root { --gutter: 20px; --nav-h: 64px; }
  .btn-nav { --btn-h: 40px; --btn-px: 14px; --btn-cut: 8px; padding: 0; font-size: 14px; }
  .nav { overflow-x: clip; }

  .hero-inner {
    justify-content: flex-start;
    padding-top: 16px;
    padding-bottom: 72px;
    min-height: auto;
  }
  .hero { min-height: 100svh; }
  .brain-stage {
    position: relative;
    inset: auto;
    width: 72vw;
    max-width: 320px;
    aspect-ratio: 1 / 1;
    margin: 0 auto 20px;
    overflow: visible;
  }
  /* Het tekenvlak is breder dan het vierkant, zodat de gloed vrij uitloopt over het zwart. */
  #brain-canvas {
    inset: auto;
    left: 50%;
    top: 50%;
    width: 100vw;
    height: 100vw;
    transform: translate(-50%, -50%);
  }
  .hero.is-still .brain-still {
    position: absolute;
    inset: 0;
    top: 0;
    right: 0;
    width: 100%;
    transform: none;
  }
  h1 {
    font-size: 52px;
    line-height: 0.94;
    letter-spacing: -0.02em;
    font-variation-settings: "wdth" 100;
    margin-bottom: 24px;
  }
  .lead { font-size: 18px; margin-bottom: 28px; }
  .cta { flex-direction: column; align-items: flex-start; gap: 16px; }
  .cta .btn { width: 100%; }
  .cta .btn > span { width: 100%; justify-content: center; }
  .cta-note { max-width: none; font-size: 15px; }
}