:root {
  --achtergrond: #f6f4ef;
  --vlak: #ffffff;
  --tekst: #1f1e1c;
  --zacht: #6b6862;
  --rand: #dcd8cf;
  --accent: #2f5d50;
  --accent-tekst: #ffffff;
  --fout: #a33a2a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --achtergrond: #181816;
    --vlak: #222220;
    --tekst: #ecebe7;
    --zacht: #a29f98;
    --rand: #3a3935;
    --accent: #7fb8a4;
    --accent-tekst: #10201b;
    --fout: #e98a78;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--achtergrond);
  color: var(--tekst);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.pagina {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

h1 { font-size: 2rem; margin: 0 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 0; }
.intro { color: var(--zacht); margin: 0 0 32px; }

.keuzes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

fieldset {
  border: 1px solid var(--rand);
  border-radius: 10px;
  background: var(--vlak);
  padding: 12px 16px 14px;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

legend { font-weight: 600; padding: 0 4px; }
fieldset label { cursor: pointer; }
input[type="radio"] { accent-color: var(--accent); }

.veld { margin-bottom: 24px; }

.veld-kop {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.veld-kop > label { font-weight: 600; }

textarea {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--vlak);
  border: 1px solid var(--rand);
  border-radius: 10px;
  padding: 12px 14px;
}

textarea { resize: vertical; }

textarea:focus,
input:focus-visible,
button:focus-visible,
summary:focus-visible,
.knop-klein:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.teller,
.uitleg { color: var(--zacht); font-size: 0.9rem; margin: 6px 0 0; }

details summary { cursor: pointer; font-weight: 600; }
details .uitleg { margin-bottom: 8px; }

button[type="submit"] {
  font: inherit;
  font-weight: 600;
  background: var(--accent);
  color: var(--accent-tekst);
  border: 0;
  border-radius: 10px;
  padding: 12px 28px;
  cursor: pointer;
}

button[disabled] { opacity: 0.6; cursor: wait; }

.knop-klein {
  font: inherit;
  font-size: 0.9rem;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--rand);
  border-radius: 8px;
  padding: 4px 12px;
  cursor: pointer;
  white-space: nowrap;
}

.acties { display: flex; gap: 8px; }

.melding { margin: 16px 0 0; }
.melding.fout { color: var(--fout); }

.uitkomst {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--rand);
}

@media (max-width: 560px) {
  .pagina { padding-top: 32px; }
  .keuzes { grid-template-columns: 1fr; }
  .veld-kop { flex-wrap: wrap; }
}