/* Lehrzeug Rechenblitz – werkzeugeigenes Design. Gemeinsam: /kern/kern.css und /kern/buehne.css */
.lz-sec-title .i { width: 18px; height: 18px; color: var(--teal-ink); }
.rb-klasse span { min-width: 34px; justify-content: center; }
.rb-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.rb-chip { position: relative; }
.rb-chip input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.rb-chip span { display: inline-flex; padding: 6px 12px; border-radius: 99px; border: 1.5px solid var(--line-2); background: var(--surface-2); font-size: 14px; font-weight: 500; cursor: pointer; }
.rb-chip input:checked + span { border-color: var(--teal); background: var(--teal-soft); color: var(--teal-ink); box-shadow: inset 0 0 0 1px var(--teal); }
.rb-chip input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.rb-sub { margin: 6px 0 0; font-size: 12.5px; color: var(--ink-3); font-weight: 600; }
.rb-vsel span { min-width: 36px; justify-content: center; }
.rb-vsel:empty, .rb-vsel[hidden] { display: none; }
.rb-beamer-set { display: flex; flex-wrap: wrap; align-items: end; gap: 12px; margin-bottom: 14px; }
.rb-beamer-set .field { margin: 0; }

/* Blatt (Vorschau und Druck) */
.rb-sheet { display: flex; gap: 0; padding: 12mm 10mm 16mm 14mm; font-family: var(--font); color: #071B4A; background: #fff; }
.rb-main { flex: 1; min-width: 0; padding-right: 5mm; }
.rb-head { display: flex; align-items: baseline; justify-content: space-between; gap: 4mm; border-bottom: .5mm solid #071B4A; padding-bottom: 1.5mm; }
.rb-head h1 { margin: 0; font-size: 18pt; line-height: 1.15; }
.rb-var { flex: none; padding: .8mm 3mm; border: .4mm solid #071B4A; border-radius: 2mm; font-weight: 700; font-size: 11pt; }
.rb-meta { display: flex; justify-content: space-between; align-items: flex-end; gap: 4mm; margin: 2mm 0 3mm; font-size: 10pt; color: #3D4B66; }
.rb-fehler { display: inline-flex; align-items: flex-end; gap: 1.5mm; font-weight: 700; color: #08735E; }
.rb-fehler i { display: inline-block; width: 16mm; height: 4mm; border-bottom: .3mm solid #071B4A; }
.rb-cols { display: flex; gap: 8mm; }
.rb-col { flex: 1; list-style: none; margin: 0; padding: 0; }
.rb-row { display: grid; grid-template-columns: 7mm minmax(0, 1fr) 6mm 30mm; align-items: end; height: 7.2mm; font-size: 13.5pt; font-variant-numeric: tabular-nums; }
.is-two .rb-row { height: 9.6mm; grid-template-columns: 7mm minmax(0, 1fr) 5mm 22mm; font-size: 12.5pt; }
.rb-nr { font-size: 8pt; color: #8E9AB0; font-style: italic; align-self: center; }
.rb-q { text-align: right; padding-right: 2mm; white-space: nowrap; }
.rb-eq { text-align: center; }
.rb-ans { height: 6mm; border: .3mm solid #071B4A; border-top: 0; border-left: 0; border-right: 0; }
.rb-strip { flex: none; width: 34mm; position: relative; border-left: .5mm dashed #8E9AB0; padding-left: 4mm; display: flex; flex-direction: column; }
.rb-fold { margin: 0 0 2mm; font-size: 7pt; color: #8E9AB0; display: flex; align-items: center; gap: 1mm; }
.rb-fold .i { width: 3mm; height: 3mm; }
.rb-strip-in { flex: 1; }
.rb-strip.is-flip .rb-strip-in { transform: rotate(180deg); }
.rb-strip-t { margin: 0 0 1.5mm; font-weight: 700; font-size: 9pt; color: #B1382A; }
.rb-strip ol { list-style: none; margin: 0; padding: 0; font-size: 9pt; line-height: 1.45; color: #B1382A; font-variant-numeric: tabular-nums; }
.rb-strip li b { display: inline-block; min-width: 5mm; color: #8E9AB0; font-weight: 500; }
.rb-lsgpage { display: block; }
.rb-lsgpage h1 { margin: 0 0 1mm; font-size: 18pt; }
.rb-lsg-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6mm 10mm; }
.rb-lsg-grid h2 { font-size: 12pt; margin: 2mm 0; }
.rb-lsg-grid ol { margin: 0; padding-left: 7mm; font-size: 10pt; line-height: 1.5; }
.lt-sheet .rb-sheet { min-height: 200px; }
@media (max-width: 600px) { .lt-sheet .rb-sheet { padding: 16px 10px; } .rb-row { font-size: 12pt; grid-template-columns: 6mm minmax(0, 1fr) 5mm 18mm; } .rb-strip { width: 22mm; } }