body {
  background-color: #232324;
  color: #7fffd4;
}

.container {
  padding: 0 15px;
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 90vh;
}

@media (max-width: 415px) {
  .container {
    margin-top: 15%;
    justify-content: flex-start;
  }
}

label {
  font-size: 20px;
  margin-bottom: 10px;
}
label:has(input#checkbox) {
  margin-top: 10px;
  margin-bottom: 20px;
  opacity: 0.5;
  cursor: pointer;
  display: flex;
  align-items: center;
  min-height: 30px;
}
label:has(input#number) {
  margin-left: 35px;
}

input {
  outline-offset: 1px;
  outline: 2px dotted transparent;
  padding: 5px 5px 3px;
  transition: outline-color 0.25s ease;
  margin-left: 5px;
  border: 0;
  border-radius: 5px;
  min-height: 30px;
  background-color: #bcbcbc;
  font-size: 22px;
}
input:focus {
  outline-color: aquamarine;
}

input#checkbox {
  cursor: pointer;
  margin-left: 10px;
  width: 20px;
  min-height: 21px;
}

input#percent {
  width: 45px;
}

.output {
  margin-top: 50px;
  opacity: 0.25;
  transition: opacity 0.25s ease;
}
.output.active {
  opacity: 1;
}

h2 {
  text-align: center;
}

.output-box {
  border: 2px dotted aquamarine;
  border-radius: 20px;
  padding: 10px 15px 9px;
  min-width: 150px;
  min-height: 28px;
  text-align: center;
  font-size: 25px;
}

.auto-resize-input {
  box-sizing: border-box;
  transition: width 0.2s ease;
  min-width: 70px;
  max-width: 500px;
  width: auto;
}

.hidden-div {
  position: absolute;
  visibility: hidden;
  height: auto;
  width: auto;
  white-space: nowrap;
}