:root {
  --blauw: #29abe2;
  --donker: #212630;
  --grijs: #6b7280;
  --achtergrond: #f4f6f8;
  --groen: #16a34a;
  --rood: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--achtergrond);
  color: var(--donker);
  font-size: 14px;
}
header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
header img { height: 44px; }
header nav { margin-left: auto; display: flex; gap: 14px; align-items: center; }
header nav a { color: var(--donker); text-decoration: none; font-weight: 500; }
header nav a:hover { color: var(--blauw); }
main { max-width: 1280px; margin: 0 auto; padding: 20px 24px; }
h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 10px; }
.kaart {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.knop {
  background: var(--blauw); color: #fff; border: 0; border-radius: 8px;
  padding: 8px 16px; font-size: 14px; font-weight: 600; cursor: pointer;
  text-decoration: none; display: inline-block;
}
.knop:hover { filter: brightness(1.08); }
.knop.secundair { background: #e5e7eb; color: var(--donker); }
.knop.groen { background: var(--groen); }
.knop.groot { padding: 14px 28px; font-size: 16px; }
.knop:disabled { opacity: .5; cursor: not-allowed; }
input[type=text], input[type=email], input[type=password], input[type=number], select {
  border: 1px solid #d1d5db; border-radius: 6px; padding: 6px 8px;
  font-size: 13px; width: 100%;
}
input:focus, select:focus { outline: 2px solid var(--blauw); outline-offset: -1px; }
.slider-rij { display: grid; grid-template-columns: 200px 1fr 90px; gap: 10px; align-items: center; padding: 4px 0; }
.slider-rij label { color: var(--donker); }
.slider-rij output { text-align: right; font-variant-numeric: tabular-nums; color: var(--grijs); font-size: 13px; }
input[type=range] { width: 100%; accent-color: var(--blauw); }
.tabel { width: 100%; border-collapse: collapse; font-size: 13px; }
.tabel th { text-align: left; color: var(--grijs); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; padding: 4px 6px; border-bottom: 1px solid #e5e7eb; }
.tabel td { padding: 5px 6px; border-bottom: 1px solid #f1f2f4; }
.tabel .bedrag { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.sectie-titel {
  background: var(--blauw); color: #fff; font-weight: 700;
  padding: 6px 10px; border-radius: 6px 6px 0 0; margin-top: 12px;
}
.sectie-blok { border: 1px solid #e5e7eb; border-top: 0; border-radius: 0 0 6px 6px; padding: 6px 10px; background: #fff; }
.subtotaal { background: #f3f4f6; font-weight: 700; padding: 5px 10px; border-radius: 4px; display: flex; justify-content: space-between; margin-top: 4px; }
.totaalbalk { background: var(--donker); color: #fff; font-weight: 800; font-size: 16px; padding: 10px 12px; border-radius: 6px; display: flex; justify-content: space-between; }
.badge { display: inline-block; border-radius: 999px; padding: 2px 10px; font-size: 11px; font-weight: 600; }
.badge.concept { background: #e5e7eb; color: #374151; }
.badge.gedeeld { background: #dbeafe; color: #1d4ed8; }
.badge.goedgekeurd { background: #dcfce7; color: #15803d; }
.prijs-blokken { display: flex; gap: 10px; flex-wrap: wrap; }
.prijs-blok { background: #e9f6fd; border-radius: 8px; padding: 8px 14px; text-align: center; flex: 1; min-width: 110px; }
.prijs-blok .label { font-size: 11px; color: var(--grijs); }
.prijs-blok .waarde { font-size: 16px; font-weight: 800; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }
.fout { color: var(--rood); font-size: 13px; }
.ok { color: var(--groen); }
.muted { color: var(--grijs); }
.code-invoer { font-size: 26px !important; letter-spacing: 10px; text-align: center; font-weight: 700; }
.link-tekst { background: #f3f4f6; border-radius: 6px; padding: 6px 10px; font-family: ui-monospace, monospace; font-size: 12px; word-break: break-all; }
@media print {
  header, .no-print { display: none !important; }
  body { background: #fff; }
  main { max-width: none; padding: 0; }
  .kaart { border: 0; }
}