.knopfreihe { display: flex; flex-wrap: wrap; gap: .8rem; margin: .6rem 0 1.6rem; }
.probe-knopf { flex: 1 1 8rem; min-height: 3rem; padding: .7rem 1rem;
               border: 2px solid #222; background: #fff; color: #222;
               font-size: .95rem; cursor: pointer;
               transition-property: background-color, color, transform;
               transition-timing-function: ease-in; }
.probe-knopf:hover, .probe-knopf:focus-visible {
               background: #222; color: #fff; transform: translateY(-2px); }
.probe-knopf:active { transform: translateY(1px); }
@media (prefers-reduced-motion: reduce) { .probe-knopf { transition-duration: 0ms !important; } }
.d0 { transition-duration: 0ms; }
.d80 { transition-duration: 80ms; }
.d120 { transition-duration: 120ms; }
.d200 { transition-duration: 200ms; }
.d300 { transition-duration: 300ms; }
.d500 { transition-duration: 500ms; }