.bt-z { position: relative; min-height: 1.6em; }
.bt-z[data-art] { padding-left: 1.35em; }
.bt-z[data-ebene="2"] { margin-left: 1.35em; }
.bt-z[data-art]::before {
    position: absolute;
    left: 0;
    top: 0;
    width: 1.1em;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}
.bt-z[data-art="ul"]::before { content: '•'; text-align: center; }
.bt-z[data-art="ul"][data-ebene="2"]::before { content: '–'; }
.bt-z[data-art="ol"]::before { content: attr(data-nr) '.'; text-align: right; padding-right: 0.25em; width: 1.1em; }
.bt-z strong { font-weight: 650; color: var(--text-main); }
.bt-z u { text-underline-offset: 2px; }
.bt-ansicht { line-height: 1.7; }
.bt-ansicht .bt-z + .bt-z[data-art]:not([data-ebene]) { margin-top: 1px; }

.bt {
    position: relative;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    transition: border-color 0.15s, box-shadow 0.15s;
}
.bt.ist-aktiv {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(var(--primary-rgb), 0.08);
}

.bt-leiste {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 4px 6px;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
}
.bt-leiste::-webkit-scrollbar { display: none; }
.bt-tag .bt-leiste { display: none; }
.bt-tag.ist-aktiv .bt-leiste,
.bt-tag:focus-within .bt-leiste { display: flex; }

.bt-knopf {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 30px;
    height: 28px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background-color 0.12s, color 0.12s;
}
.bt-knopf svg { width: 16px; height: 16px; }
@media (hover: hover) and (pointer: fine) {
    .bt-knopf:hover { background: var(--bg-hover); color: var(--text-main); }
}
.bt-knopf[aria-pressed="true"] { background: rgba(var(--primary-rgb), 0.14); color: var(--primary); }
.bt-knopf:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
.bt-trenner { flex: 0 0 1px; align-self: stretch; margin: 4px 4px; background: var(--border); }

.bt-feld {
    position: relative;
    padding: 10px 13px;
    color: var(--text-main);
    font-size: 0.88rem;
    font-family: var(--font-main);
    line-height: 1.6;
    max-height: 420px;
    overflow-y: auto;
    outline: none;
    overflow-wrap: anywhere;
    cursor: text;
}
.bt-tag .bt-feld { font-size: 0.85rem; line-height: 1.5; max-height: 320px; }
.bt-feld.ist-leer::before {
    content: attr(data-platzhalter);
    position: absolute;
    pointer-events: none;
    color: var(--text-dim);
    white-space: pre-line;
    max-width: calc(100% - 26px);
    overflow: hidden;
}

.bt-quelle {
    position: absolute !important;
    left: 12px;
    bottom: 0;
    width: 1px !important;
    height: 1px !important;
    min-height: 0 !important;
    padding: 0 !important;
    border: 0 !important;
    opacity: 0;
    pointer-events: none;
    resize: none;
}

@media (hover: none) {
    .bt-knopf { width: 36px; height: 34px; }
    .bt-feld { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
    .bt, .bt-knopf { transition: none; }
}