.calc-box {
  margin: 0 0 1em;
  padding: 12px 14px 14px;
  background: linear-gradient(180deg, #FFFBF3 0%, #FFF 100%);
  border: 1px solid #F9BE11;
  border-radius: 10px;
}

#main .calc-box p {
  padding-left: 0;
  margin-bottom: 0;
}

.calc-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  font-size: 15px;
  line-height: 1.5;
  color: #333;
  margin-bottom: 10px;
}

.calc-input {
  width: 4.2em;
  height: 38px;
  padding: 0 8px;
  border: 1px solid #E0C56A;
  border-radius: 8px;
  background: #FFF;
  font-size: 16px;
  font-family: inherit;
  font-weight: bold;
  text-align: center;
  color: #333;
  box-sizing: border-box;
}

.calc-input:focus {
  outline: 2px solid #F9BE11;
  outline-offset: 1px;
  border-color: #F9BE11;
}

.calc-input--result {
  width: 4.6em;
  background: #FFF9EE;
  border-color: #F0A040;
  color: #C04A10;
}

.calc-btn {
  display: inline-block;
  min-height: 40px;
  padding: 8px 18px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #FBC742 0%, #F9BE11 100%);
  color: #333;
  font-size: 15px;
  font-weight: bold;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(133, 101, 3, 0.15);
}

.calc-btn:hover {
  background: linear-gradient(135deg, #FFD45A 0%, #FBC742 100%);
}

.calc-btn:active {
  transform: translateY(1px);
}

.calc-btn:focus-visible {
  outline: 2px solid #0099CC;
  outline-offset: 2px;
}

@media screen and (max-width: 500px) {
  .calc-input {
    width: 3.8em;
    height: 36px;
    font-size: 15px;
  }

  .calc-btn {
    width: 100%;
  }
}