/* Boekenkist — opzet: een rustige boekenkast (omslagen staan centraal) met een werkblad dat eruitziet als het papieren lesformat. */
:root {
  --bg: #F6F7F4;
  --surface: #FFFFFF;
  --ink: #1C2533;
  --muted: #5E6878;
  --line: #E1E4DE;
  --accent: #2E5A88;      /* vulpen-blauw */
  --accent-ink: #FFFFFF;
  --accent-soft: #E6EEF7;
  --marker: #F2C14E;      /* potlood-geel, spaarzaam */
  --marker-soft: #FBF0D2;
  --danger: #B3372F;
  --ok: #2F7A4F;
  --shadow: 0 1px 2px rgba(28, 37, 51, .06), 0 6px 18px rgba(28, 37, 51, .07);
  --font-display: ui-rounded, "SF Pro Rounded", "Nunito", "Segoe UI", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-sheet: Calibri, Carlito, "Segoe UI", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141A22; --surface: #1C2430; --ink: #E7EBF0; --muted: #9AA5B4; --line: #2C3744;
    --accent: #7FAEE0; --accent-ink: #0F1620; --accent-soft: #233348;
    --marker: #E8B840; --marker-soft: #3A3220; --danger: #E57B72; --ok: #6CC495;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 var(--font-body); }
a { color: var(--accent); }
img { max-width: 100%; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; text-wrap: balance; margin: 0; }
h1 { font-size: 1.85rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 700; }
h3 { font-size: 1.02rem; font-weight: 650; }
p { margin: 0; }
.num { font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--marker); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 1180px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
main.wrap { padding-block: 28px 56px; }
.loading { padding: 48px 0; text-align: center; color: var(--muted); }

/* Kopbalk */
.top { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.top-in { max-width: 1180px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px max(16px, env(safe-area-inset-right, 0px)) 10px max(16px, env(safe-area-inset-left, 0px)); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-family: var(--font-display); font-weight: 800; font-size: 1.2rem; letter-spacing: -.01em; }
.top nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.top nav a, .linkish { padding: 7px 12px; border-radius: 8px; text-decoration: none; color: var(--muted); font: 600 .95rem var(--font-body); background: none; border: 0; cursor: pointer; }
.top nav a:hover, .linkish:hover { color: var(--ink); background: var(--bg); }
.top nav a.on { color: var(--accent); background: var(--accent-soft); }
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; padding-block: 18px; }

/* Knoppen en velden */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 16px; border-radius: 9px; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); font: 600 .95rem var(--font-body); text-decoration: none; cursor: pointer; white-space: nowrap; }
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .6; cursor: default; }
.btn.ghost { background: transparent; color: var(--accent); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent); filter: none; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost.danger { background: transparent; color: var(--danger); border-color: var(--line); }
.btn.small { padding: 5px 10px; font-size: .85rem; border-radius: 7px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.inline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline > input, .inline > select { flex: 1; min-width: 0; }
.field .inline { flex-wrap: nowrap; }
.stack { display: grid; gap: 20px; }
.grow { flex: 1; min-width: 0; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px; width: 100%; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
input:disabled { color: var(--muted); background: var(--bg); }
textarea { resize: vertical; }
.field { display: grid; gap: 5px; min-width: 0; }
.field > span { font-weight: 600; font-size: .88rem; }
.field small, small { color: var(--muted); font-size: .8rem; }
.check { display: flex; gap: 8px; align-items: flex-start; font-size: .92rem; cursor: pointer; }
.check input { width: auto; margin-top: 4px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 16px; align-items: start; }
.form-grid .wide { grid-column: 1 / -1; }
fieldset { border: 0; border-top: 1px solid var(--line); margin: 0; padding: 18px 0 4px; display: grid; gap: 14px; }
fieldset:first-of-type { border-top: 0; padding-top: 0; }
legend { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; padding: 0 0 4px; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 22px; display: grid; gap: 16px; align-content: start; min-width: 0; }
.card.narrow { max-width: 420px; margin: 24px auto; }
.notice { padding: 11px 14px; border-radius: 9px; background: var(--accent-soft); font-size: .93rem; }
.notice.error { background: color-mix(in srgb, var(--danger) 13%, var(--surface)); color: var(--danger); }
.notice.ok { background: color-mix(in srgb, var(--ok) 13%, var(--surface)); }
.notice.page { margin: 40px auto; max-width: 600px; }
.confirm { display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: .85rem; }
.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(20px + env(safe-area-inset-bottom, 0px)); background: var(--ink); color: var(--bg); padding: 11px 18px; border-radius: 10px; box-shadow: var(--shadow); z-index: 50; max-width: calc(100% - 32px); font-weight: 500; }
.toast.error { background: var(--danger); color: #fff; }

/* Pillen */
.pill { display: inline-block; padding: 2px 9px; border-radius: 99px; font-size: .78rem; font-weight: 650; letter-spacing: .01em; white-space: nowrap; }
.pill.age { background: var(--marker-soft); color: var(--ink); border: 1px solid color-mix(in srgb, var(--marker) 55%, transparent); }
.pill.cat { background: var(--accent-soft); color: var(--accent); }

/* Dashboard */
.dash { display: grid; gap: 30px; }
.intro { display: grid; gap: 8px; max-width: 65ch; }
.intro p { color: var(--muted); font-size: 1.02rem; }
.filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.filters .search { flex: 1 1 260px; }
.filters .select { flex: 0 1 220px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; flex: 1 1 100%; order: 3; }
.chip { border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 99px; padding: 6px 12px; font: 600 .85rem var(--font-body); cursor: pointer; }
.chip:hover { border-color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.count { color: var(--muted); font-size: .9rem; font-variant-numeric: tabular-nums; }
.empty { border: 1px dashed var(--line); border-radius: 14px; padding: 28px; text-align: center; display: grid; gap: 12px; justify-items: center; color: var(--muted); }

.shelf { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 22px; }
.book-card { display: grid; grid-template-rows: auto 1fr; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: inherit; overflow: hidden; transition: transform .15s, box-shadow .15s; }
.book-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.bc-cover { background: linear-gradient(var(--bg), var(--bg)) padding-box; padding: 20px 20px 0; display: flex; justify-content: center; border-bottom: 6px solid color-mix(in srgb, var(--marker) 70%, var(--line)); }
.bc-cover .cover { height: 220px; width: auto; aspect-ratio: auto; margin-bottom: -1px; border-radius: 3px 3px 0 0; box-shadow: 4px 0 10px rgba(0,0,0,.12); }
.bc-body { padding: 14px 16px 16px; display: grid; gap: 6px; align-content: start; grid-template-rows: auto auto 1fr auto; }
.bc-author { color: var(--muted); font-size: .88rem; }
.bc-desc { font-size: .88rem; color: var(--ink); opacity: .88; }
.bc-foot { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 6px; }
.lessons-n { font-size: .82rem; font-weight: 650; color: var(--accent); }
.lessons-n.none { color: var(--muted); font-weight: 500; }

.cover { display: block; object-fit: cover; background: var(--line); border-radius: 4px; aspect-ratio: 2 / 3; width: 100%; max-width: 220px; }
.cover.lg { width: 230px; max-width: 100%; box-shadow: var(--shadow); }
.cover.xs { width: 44px; height: auto; flex: none; align-self: flex-start; border-radius: 3px; }
.cover-empty { display: flex; align-items: center; justify-content: center; text-align: center; padding: 10px; background: var(--accent-soft); color: var(--accent); font: 700 .85rem var(--font-display); height: 220px; width: 150px; }
.cover-empty.xs { height: 64px; width: 44px; font-size: 0; }
.cover-empty.lg { height: 340px; width: 230px; }

.lesson-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.lesson-card { display: flex; gap: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px; text-decoration: none; color: inherit; min-width: 0; }
.lesson-card:hover { border-color: var(--accent); }
.lc-body { display: grid; gap: 5px; align-content: start; min-width: 0; }
.lc-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.lc-book { color: var(--muted); font-size: .85rem; }
.lc-goal { font-size: .86rem; }
.lc-goal b { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-right: 4px; }

/* Boekpagina */
.back { display: inline-block; margin-bottom: 16px; text-decoration: none; font-weight: 600; font-size: .92rem; }
.book-page { display: grid; gap: 34px; }
.book-page > .back { margin-bottom: -18px; }
.book-hero { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 32px; align-items: start; }
.bh-body { display: grid; gap: 12px; max-width: 68ch; }
.bh-author { font-size: 1.05rem; }
.bh-tags { display: flex; gap: 8px; align-items: center; font-size: .9rem; }
.bh-desc { font-size: 1rem; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 28px; margin: 4px 0; }
.facts dt, .side-facts dt { font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 650; }
.facts dd, .side-facts dd { margin: 0; }

/* Lespagina */
.lesson-layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 28px; align-items: start; }
.lesson-side { display: grid; gap: 16px; position: sticky; top: 76px; }
.lesson-side h1 { font-size: 1.45rem; }
.side-facts { display: grid; gap: 10px; margin: 0; }
.actions { display: grid; gap: 10px; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.attachments h2 { font-size: 1rem; margin-bottom: 6px; }
.attachments ul, .att-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.att-list li { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* Werkblad (papier, altijd licht, zoals het Lesformat) */
.sheet-wrap { overflow-x: auto; }
.sheet { background: #fff; color: #111; font: 13pt/1.45 var(--font-sheet); width: 100%; max-width: 210mm; min-height: 297mm; margin: 0 auto; padding: 22mm 22mm; box-shadow: var(--shadow); border-radius: 3px; display: grid; gap: 18px; align-content: start; }
.sheet b { font-weight: 700; }
.ws-head p { margin: 0; }
.ws-info { font-size: 10pt; color: #555; display: flex; flex-wrap: wrap; gap: 4px 18px; border-left: 3px solid #F2C14E; padding: 4px 0 4px 10px; }
.ws-info p { flex-basis: 100%; }
.ws-section { display: grid; gap: 12px; }
.ws-section h3 { font: 700 13pt var(--font-sheet); text-decoration: underline; text-underline-offset: 3px; }
.ws-q { break-inside: avoid; }
.ws-q p { font-weight: 700; font-style: italic; }
.ws-lines { display: grid; gap: 0; }
.ws-lines span { display: block; height: 2.1em; border-bottom: 1.2px solid #444; }
.sheet-wrap.small .sheet { font-size: 10pt; padding: 12mm; min-height: 0; }
.sheet-wrap.small .ws-section h3 { font-size: 10pt; }

/* Beheer */
.admin { display: grid; gap: 18px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tabs a { padding: 9px 14px; text-decoration: none; color: var(--muted); font-weight: 600; border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tabs a.on { color: var(--accent); border-color: var(--accent); }
.isbn-row { display: flex; gap: 10px; align-items: end; flex-wrap: wrap; }
.isbn-row .field { flex: 1 1 260px; }
.isbn-result { display: grid; gap: 14px; }
.isbn-preview { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 24px; align-items: start; }
.isbn-preview > div { display: grid; gap: 12px; align-content: start; min-width: 0; }
.table-wrap { overflow-x: auto; }
table.list { width: 100%; border-collapse: collapse; font-size: .92rem; }
.list th { text-align: left; font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--line); }
.list td { padding: 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.actions-cell { text-align: right; white-space: nowrap; }
.actions-cell > * { margin-left: 6px; }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; align-items: start; }
.edit-list { list-style: none; margin: 0; padding: 0; display: grid; }
.edit-list li { display: flex; gap: 8px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.edit-list li input { flex: 1; min-width: 140px; }
.lesson-edit h1 { margin-bottom: 18px; }
.edit-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.preview { position: sticky; top: 76px; display: grid; gap: 8px; }
.preview-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 650; }
.preview .sheet-wrap { max-height: calc(100vh - 120px); overflow: auto; border-radius: 6px; }
.sticky-save { position: sticky; bottom: 0; background: var(--surface); padding: 12px 0 2px; border-top: 1px solid var(--line); }

@media (max-width: 900px) {
  .lesson-layout, .edit-layout, .two-col { grid-template-columns: 1fr; }
  .lesson-side, .preview { position: static; }
  .sheet { padding: 12mm; min-height: 0; }
}
@media (max-width: 640px) {
  h1 { font-size: 1.5rem; }
  .book-hero, .isbn-preview { grid-template-columns: 1fr; }
  .book-hero .cover { width: 160px; }
  .form-grid { grid-template-columns: 1fr; }
  .shelf { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
  .bc-cover .cover { height: 170px; }
  .bc-desc { display: none; }
  .lesson-grid { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  .sheet { padding: 8mm; font-size: 11pt; }
}
@media (prefers-reduced-motion: reduce) { .book-card { transition: none; } .book-card:hover { transform: none; } }

/* Printen: alleen het werkblad, op A4 */
@media print {
  @page { size: A4; margin: 18mm; }
  body { background: #fff; }
  .noprint, .top, .foot, .toast { display: none !important; }
  main.wrap { padding: 0; max-width: none; }
  .lesson-layout { display: block; }
  .sheet { box-shadow: none; padding: 0; max-width: none; min-height: 0; border-radius: 0; }
}