/* Formeln Button - Button-27 Style */
.formeln {
  position: relative;
  padding: 10px 20px;
  background: linear-gradient(0deg, #fcfcfc 0%, #f5f5f5 100%);
  border: 4px solid transparent;
  border-radius: 14px;
  background-clip: padding-box;
  box-shadow: 0 15px 45px -15px #000, 1px 3px 3px 2px #fff;
  font-family: "Inter", sans-serif;
  font-size: 18px;
  line-height: 1;
  transition: all 0.1s ease-in-out;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  width: 100%;
  white-space: nowrap;
}

.formeln:after {
  position: absolute;
  top: -4px;
  bottom: -4px;
  left: -4px;
  right: -4px;
  background: linear-gradient(#fff, #ededed);
  content: "";
  z-index: -1;
  border-radius: 14px;
}

.formeln::before {
  content: '❓';
  font-size: 28px;
  background: radial-gradient(circle, #fff, #e0e0e0);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 1px 1px 2px rgba(0,0,0,0.1), 1px 1px 3px rgba(0,0,0,0.2);
}

.formeln .text {
  font-weight: 600;
  color: #374151;
}

.formeln:hover {
  border: 2px solid transparent;
  background-image: linear-gradient(180deg, #E6E6E6 0%, #F7F7F7 100%);
  box-shadow: 0 0 2px 0 rgba(0, 0, 0, 0.35);
  transform: scale(1.05);
  z-index: 10;
}

.formeln:active {
  border-top: 1px solid transparent;
}