/* ==========================================================================
   Bijles Marc Versluys — stylesheet
   Palet: inkt #1d2320 · papier #faf7f0 · groen #2f5d50 · goud #c99700 · roest #b4462a
   ========================================================================== */

:root {
  --paper: #faf7f0;
  --paper-2: #f4f1e8;
  --paper-3: #f7f4ec;
  --card: #ffffff;
  --field: #fdfcf8;

  --ink: #1d2320;
  --ink-2: #3d4a44;
  --ink-3: #5b6660;
  --ink-4: #6d7a72;
  --ink-5: #96a09a;

  --green: #2f5d50;
  --green-dark: #254a40;
  --green-soft: #e8efe9;
  --green-light: #9dc3b4;
  --gold: #c99700;
  --gold-dark: #8a6a12;
  --rust: #b4462a;

  --line: #e6e1d5;
  --line-2: #eae5d9;
  --line-3: #e0dbcf;
  --line-field: #ddd7c9;
  --line-soft: #cfd8d1;

  --display: "Bricolage Grotesque", "Trebuchet MS", sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 14px;
  --radius-lg: 20px;
  --shell: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

img { max-width: 100%; }

a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--rust); }

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
  border-radius: 4px;
}

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--green);
  color: var(--paper);
  font-family: var(--display);
  padding: 12px 18px;
  border-radius: 0 0 10px 0;
  z-index: 20;
}
.skip-link:focus {
  left: 0;
  color: var(--paper);
}

/* --- typografie ---------------------------------------------------------- */

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 14px;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  letter-spacing: -.025em;
  text-wrap: balance;
}

h1 {
  font-weight: 800;
  font-size: clamp(38px, 5.4vw, 66px);
  line-height: 1.02;
  letter-spacing: -.03em;
  margin: 0 0 22px;
}

h2 {
  font-weight: 800;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.08;
  margin: 0 0 24px;
}

p { text-wrap: pretty; }

/* --- header -------------------------------------------------------------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 8px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 10px;
  background: var(--green);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 3px;
  padding: 7px;
}
.brand__mark span { border-radius: 2px; background: var(--paper); }
.brand__mark span:nth-child(2),
.brand__mark span:nth-child(3) { background: var(--gold); }

.brand__name {
  display: block;
  font-family: var(--display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
}
.brand__tagline {
  display: block;
  margin-top: 1px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-4);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.nav a {
  font-family: var(--display);
  font-size: 14px;
  text-decoration: none;
  color: var(--ink-2);
}
.nav a:hover { color: var(--green); }

.langs {
  display: flex;
  gap: 2px;
  background: var(--line-2);
  padding: 3px;
  border-radius: 999px;
}
.langs button {
  border: 0;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  padding: 6px 11px;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-3);
  transition: background .15s ease, color .15s ease;
}
.langs button:hover { color: var(--green); }
.langs button[aria-current="true"] {
  background: var(--green);
  color: var(--paper);
}

/* --- knoppen ------------------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 16px;
  padding: 15px 26px;
  border-radius: 10px;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s ease, border-color .15s ease;
}
.btn--primary { background: var(--green); color: var(--paper); }
.btn--primary:hover { background: var(--green-dark); color: var(--paper); }
.btn--ghost {
  color: var(--green);
  padding: 15px 20px;
  border: 1.5px solid var(--line-soft);
  background: transparent;
}
.btn--ghost:hover { border-color: var(--green); color: var(--green); }
.btn--sm { font-size: 15px; padding: 12px 20px; border-radius: 9px; }

/* --- hero ---------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 64px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--green-soft);
  color: var(--green);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 7px 13px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.hero__body {
  font-size: 19px;
  line-height: 1.62;
  color: var(--ink-2);
  max-width: 34em;
  margin: 0 0 32px;
}

.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.hero__figure { position: relative; }
.hero__figure::before {
  content: "";
  position: absolute;
  inset: -18px -18px 30px -18px;
  border-radius: 24px;
  background-image: radial-gradient(#cdd6cf 1.4px, transparent 1.4px);
  background-size: 14px 14px;
}
.blob {
  position: absolute;
  animation: floaty 7s ease-in-out infinite;
}
.blob--gold {
  top: -26px; right: -10px;
  width: 64px; height: 64px;
  border-radius: 14px;
  background: var(--gold);
}
.blob--rust {
  bottom: 8px; left: -26px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--rust);
  animation-duration: 9s;
}
.hero__photo {
  position: relative;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 22%;
  border-radius: var(--radius-lg);
  display: block;
  box-shadow: 0 18px 44px rgba(29, 35, 32, .18);
}

@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(4deg); }
}
@keyframes pop {
  from { transform: scale(.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* --- stats --------------------------------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-3);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 88px;
  list-style: none;
  padding: 0;
}
.stats li { background: var(--paper-2); padding: 24px 22px; }
.stats dt, .stat__k {
  font-family: var(--display);
  font-weight: 800;
  font-size: 32px;
  color: var(--green);
  letter-spacing: -.02em;
}
.stat__v {
  font-size: 14.5px;
  color: var(--ink-3);
  line-height: 1.4;
  margin-top: 4px;
}

/* --- secties ------------------------------------------------------------- */

section[id] { scroll-margin-top: 20px; }

.about {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 56px;
  align-items: start;
  padding-bottom: 96px;
}
.about__photo {
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: 50% 20%;
  border-radius: 16px;
  display: block;
}
.about__caption {
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--ink-4);
}
.about p {
  font-size: 18px;
  line-height: 1.68;
  color: var(--ink-2);
  margin: 0 0 18px;
}
.quote {
  border-left: 3px solid var(--gold);
  padding: 4px 0 4px 20px;
  margin: 28px 0 0;
}
.quote p {
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.45;
  color: var(--green);
  margin: 0;
}

.approach { padding-bottom: 96px; }
.approach h2 { max-width: 16em; margin-bottom: 40px; }
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 28px 30px;
  transition: border-color .15s ease;
}
.card:hover { border-color: var(--green); }
.card__n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold-dark);
  font-weight: 700;
  margin-bottom: 14px;
}
.card h3 {
  font-weight: 600;
  font-size: 21px;
  margin: 0 0 10px;
  letter-spacing: -.01em;
}
.card p {
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--ink-3);
  margin: 0;
}

/* --- voor wie ------------------------------------------------------------ */

.audience {
  background: var(--green);
  color: #f2f5f1;
  border-radius: var(--radius-lg);
  padding: 52px 48px;
  margin-bottom: 96px;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.audience .kicker { color: var(--green-light); }
.audience h2 { font-size: 34px; margin: 0; }
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chips li {
  background: rgba(255, 255, 255, .09);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  padding: 11px 18px;
  font-size: 16px;
}

/* --- puzzels ------------------------------------------------------------- */

.puzzles { padding-bottom: 96px; }
.puzzles h2 { max-width: 15em; margin-bottom: 16px; }
.puzzles__intro {
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink-3);
  max-width: 40em;
  margin: 0 0 40px;
}

.sudoku-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 44px;
  align-items: start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 36px;
}

.sudoku {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 3px;
  background: var(--green);
  padding: 3px;
  border-radius: 8px;
  width: min(392px, 74vw);
}
.sudoku__box {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: #bcc9c1;
  min-width: 0;
}
.sudoku__cell {
  aspect-ratio: 1;
  min-width: 0;
  min-height: 0;
  border: 0;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 400;
  background: var(--card);
  color: var(--green);
}
.sudoku__cell[data-given="true"] {
  font-weight: 600;
  background: #f1efe7;
  color: var(--ink);
  cursor: default;
}
.sudoku__cell[data-peer="true"] { background: #eef3ee; }
.sudoku__cell[aria-selected="true"] { background: #d6e6dd; }
.sudoku__cell[data-bad="true"] { background: #f7ddd5; color: var(--rust); }

.pad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin-top: 14px;
  width: min(392px, 74vw);
}
.pad button {
  min-width: 0;
  border: 1px solid #d8d2c4;
  background: var(--paper-3);
  border-radius: 8px;
  padding: 12px 0;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--green);
  transition: background .12s ease, border-color .12s ease;
}
.pad button:hover { background: var(--green-soft); border-color: var(--green); }

.sudoku-panel h3 {
  font-weight: 600;
  font-size: 23px;
  margin: 0 0 12px;
  letter-spacing: -.01em;
}
.sudoku-panel__intro {
  font-size: 16.5px;
  line-height: 1.62;
  color: var(--ink-3);
  margin: 0 0 22px;
}
.sudoku-panel__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.status {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
  padding: 14px 16px;
  border-radius: 9px;
  background: var(--paper-2);
  color: var(--ink-3);
}
.status[data-tone="ok"] { background: #e2efe6; color: var(--green); }
.status[data-tone="bad"] { background: #f9e6df; color: var(--rust); }

.variants {
  margin-top: 28px;
  border-top: 1px solid var(--line-2);
  padding-top: 22px;
}
.variants .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-5);
  margin-bottom: 10px;
}
.variants p { font-size: 16px; line-height: 1.6; color: var(--ink-3); margin: 0; }

.experiments { margin-top: 56px; }
.experiments h3 {
  font-weight: 800;
  font-size: 26px;
  margin: 0 0 8px;
  letter-spacing: -.01em;
}
.experiments__intro {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-3);
  margin: 0 0 26px;
  max-width: 38em;
}
.experiment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.experiment {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}
.experiment__slot {
  aspect-ratio: 4 / 3;
  background-image: repeating-linear-gradient(135deg, #efece2 0 8px, #f7f4ec 8px 16px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: #9aa39c;
  text-align: center;
  padding: 0 18px;
}
.experiment__body { padding: 20px; }
.experiment h4 {
  font-weight: 600;
  font-size: 18px;
  margin: 0 0 7px;
  letter-spacing: -.01em;
}
.experiment p {
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ink-3);
  margin: 0;
}

/* --- faq ----------------------------------------------------------------- */

.faq { padding-bottom: 96px; }
.faq h2 { margin-bottom: 36px; }
.faq__list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 0;
}
.faq__item {
  background: var(--paper);
  padding: 26px 4px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 40px;
  align-items: start;
}
.faq__item h3 {
  font-weight: 600;
  font-size: 19px;
  margin: 0;
  letter-spacing: -.01em;
}
.faq__item p {
  font-size: 16.5px;
  line-height: 1.62;
  color: var(--ink-3);
  margin: 0;
}

/* --- contact ------------------------------------------------------------- */

.contact {
  padding-bottom: 96px;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 56px;
  align-items: start;
}
.contact h2 { font-size: clamp(28px, 3.4vw, 40px); margin-bottom: 20px; }
.contact__intro {
  font-size: 17.5px;
  line-height: 1.65;
  color: var(--ink-3);
  margin: 0 0 30px;
}
.contact__details {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 0;
}
.contact__details dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-5);
  margin-bottom: 5px;
}
.contact__details dd { margin: 0; }
.contact__phone {
  font-family: var(--display);
  font-weight: 600;
  font-size: 21px;
  text-decoration: none;
}
.contact__address {
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-2);
  font-style: normal;
}

.form-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 34px;
}
.form { display: flex; flex-direction: column; gap: 16px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 6px; }
.form label > span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.form input,
.form textarea {
  border: 1px solid var(--line-field);
  border-radius: 9px;
  padding: 12px 13px;
  font-family: var(--serif);
  font-size: 16px;
  background: var(--field);
  color: var(--ink);
  width: 100%;
}
.form textarea { resize: vertical; }
.form input:focus,
.form textarea:focus {
  border-color: var(--green);
  outline: none;
  box-shadow: 0 0 0 3px rgba(47, 93, 80, .12);
}
.form input:user-invalid,
.form textarea:user-invalid { border-color: var(--rust); }
.form button { margin-top: 4px; padding: 15px; width: 100%; }
.form__note {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink-5);
  margin: 2px 0 0;
  text-align: center;
}
.form__error {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--rust);
  margin: 0;
}

.form-sent {
  padding: 40px 8px;
  text-align: center;
  animation: pop .35s ease;
}
.form-sent__check {
  width: 54px;
  height: 54px;
  border-radius: var(--radius);
  background: var(--green-soft);
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 24px;
  color: var(--green);
}
.form-sent h3 {
  font-weight: 600;
  font-size: 22px;
  margin: 0 0 10px;
}
.form-sent p {
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--ink-3);
  margin: 0 auto;
  max-width: 26em;
}

[hidden] { display: none !important; }

/* --- footer -------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 0 44px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-5);
}

/* --- responsive ---------------------------------------------------------- */

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 44px; padding: 40px 0 56px; }
  .hero__figure { max-width: 420px; }
  .about { grid-template-columns: 1fr; gap: 32px; padding-bottom: 72px; }
  .about__photo { max-width: 380px; }
  .audience { grid-template-columns: 1fr; gap: 28px; padding: 40px 32px; margin-bottom: 72px; }
  .sudoku-panel { grid-template-columns: 1fr; gap: 32px; padding: 28px; }
  .sudoku, .pad { width: min(392px, 100%); }
  .experiment-grid { grid-template-columns: repeat(2, 1fr); }
  .contact { grid-template-columns: 1fr; gap: 36px; }
  .faq__item { grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .shell { padding: 0 18px; }
  .site-header { padding-top: 16px; }
  .nav { gap: 16px; width: 100%; justify-content: space-between; }
  .stats { grid-template-columns: repeat(2, 1fr); margin-bottom: 64px; }
  .cards { grid-template-columns: 1fr; }
  .experiment-grid { grid-template-columns: 1fr; }
  .approach, .puzzles, .faq, .contact { padding-bottom: 72px; }
  .form__row { grid-template-columns: 1fr; }
  .form-card { padding: 24px; }
  .audience { padding: 32px 24px; }
  .audience h2 { font-size: 28px; }
}

@media (max-width: 480px) {
  .nav { font-size: 13px; gap: 12px; }
  .nav a { font-size: 13px; }
  .stats { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; text-align: center; }
}

@media print {
  .langs, .pad, .sudoku-panel__actions, .form-card { display: none; }
  body { background: #fff; }
}