* {
  box-sizing: border-box;
}

:root {
  --blauw: #1a3a5c;
  --blauw-donker: #122a42;
  --lichtblauw: #edf4ff;
  --accent: #f6d96c;
  --tekst: #2c3e50;
  --subtiel: #72819a;
  --kaart-rand: #bfd2ee;
  --paneel: #ffffff;
  --achtergrond: #f4f6fb;
  --schaduw: 0 10px 30px rgba(26, 58, 92, 0.08);
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--tekst);
  background: var(--achtergrond);
}

.site-header {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 24px;
  background: #ffffff;
  border-bottom: 1px solid #dbe4f0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 160px;
  padding: 12px 18px;
  border-radius: 14px;
  text-decoration: none;
  background: var(--blauw);
  color: #ffffff;
  font-weight: 700;
  box-shadow: var(--schaduw);
}

.menu-btn:hover {
  background: var(--blauw-donker);
}

.header-text h1 {
  margin: 0 0 4px 0;
  font-size: 28px;
}

.header-text p {
  margin: 0;
  color: var(--subtiel);
}

.app-shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  padding: 24px;
  align-items: start;
}

.panel {
  background: var(--paneel);
  border: 1px solid #dbe4f0;
  border-radius: 22px;
  padding: 22px;
  box-shadow: var(--schaduw);
}

.controls-panel h2,
.preview-panel h2 {
  margin-top: 0;
  margin-bottom: 18px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

.field input[type="text"],
.field input[type="number"],
.field select {
  width: 100%;
  border: 1px solid #c9d6ea;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 16px;
  font-family: inherit;
  background: #ffffff;
}

.field small {
  display: block;
  margin-top: 6px;
  color: var(--subtiel);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-row label {
  margin: 0;
}

.info-box {
  background: var(--lichtblauw);
  border: 1px solid #d8e6ff;
  border-radius: 16px;
  padding: 14px;
  margin: 18px 0;
}

.info-box p {
  margin: 6px 0 0 0;
  line-height: 1.45;
  color: var(--subtiel);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-btn,
.secondary-btn {
  border: none;
  border-radius: 14px;
  padding: 13px 18px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn {
  background: var(--blauw);
  color: #ffffff;
}

.primary-btn:hover {
  background: var(--blauw-donker);
}

.secondary-btn {
  background: var(--accent);
  color: #453300;
}

.preview-header {
  margin-bottom: 16px;
}

#previewMeta {
  margin: 6px 0 0 0;
  color: var(--subtiel);
}

.page-preview {
  background: #ffffff;
  border: 1px dashed #c9d6ea;
  border-radius: 24px;
  padding: 22px;
}

.page-top {
  margin-bottom: 18px;
}

.preview-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--blauw);
  margin-bottom: 10px;
}

.preview-name-line {
  font-size: 18px;
  font-weight: 700;
}

.kaartjes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 16px;
}

.leeskaartje {
  position: relative;
  border: 2px solid var(--kaart-rand);
  border-radius: 22px;
  background: linear-gradient(180deg, #fffef7 0%, #ffffff 100%);
  padding: 16px;
  min-height: 250px;
  overflow: hidden;
}

.leeskaartje::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 22px;
  pointer-events: none;
  box-shadow: inset 0 0 0 6px rgba(246, 217, 108, 0.12);
}

.kaart-label {
  display: block;
  margin-bottom: 16px;
  color: #5f7087;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}

.woorden-lijst {
  margin: 0;
  padding-left: 22px;
}

.woorden-lijst li {
  margin-bottom: 12px;
  line-height: 1.25;
  font-weight: inherit;
}

.kaart-tekstje {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid #d7dfef;
  color: #4d5f79;
  line-height: 1.35;
  font-weight: inherit;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
}

.avi-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.avi-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid #c9d6ea;
  border-radius: 12px;
  background: #ffffff;
  font-weight: 700;
  cursor: pointer;
  margin: 0;
}

.avi-option input[type="checkbox"] {
  margin: 0;
  width: 16px;
  height: 16px;
}

.avi-option span {
  font-weight: 700;
}

@media (max-width: 980px) {
  .avi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .avi-grid {
    grid-template-columns: 1fr;
  }
}