@import url("https://rsms.me/inter/inter.css");
:root {
  --color-light: white;
  --color-dark: #212121;
  --color-signal: #fab700;
  --color-alert: red;
  --color-ocean: blue;
  --color-grass: green;
  --color-background: var(--color-light);
  --color-text: var(--color-dark);
  --color-accent: var(--color-signal);
  --size-bezel: .5rem;
  --size-radius: 8px;
  line-height: 1.4;
  font-family: "Inter", sans-serif;
  font-size: calc(.6rem + .4vw);
  color: var(--color-text);
  background: var(--color-background);
  background-image: linear-gradient(90deg, transparent 0%, #fff 50%, transparent 100%), url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAYAAADED76LAAAAIklEQVQoU2N89+7dfwYsQEhIiBEkzDgkFGDzAbIY2Cv4AACvrBgJjYNGfwAAAABJRU5ErkJggg==);
  font-weight: 300;
  padding: 0 calc(var(--size-bezel) * 3);
}

h1, h3 {
  font-weight: 900;
  margin-top: -5px;
}

h2 {
  font-size: 20px;
  font-weight: 900;
  padding-left: 10px;
}

.bold-text {
  font-weight: bold;
}

.card {
  background: var(--color-background);
  padding: calc(4 * var(--size-bezel));
  margin-top: calc(4 * var(--size-bezel));
  border-radius: var(--size-radius);
  border: 3px solid var(--color-shadow, currentColor);
  box-shadow: 0.5rem 0.5rem 0 var(--color-shadow, currentColor);
  width: 35%;
}
.card--inverted {
  --color-background: var(--color-dark);
  color: var(--color-light);
  --color-shadow: var(--color-accent);
}
.card--accent {
  --color-background: var(--color-signal);
  --color-accent: var(--color-light);
  color: var(--color-dark);
}
.card *:first-child {
  margin-top: 0;
}
.card h2 {
  display: flex;
  align-items: center;
}
.card h2 box-icon {
  margin-right: 0.5rem;
}

.l-design-width {
  max-width: 400%;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.input {
  position: relative;
}
.input__label {
  position: absolute;
  left: 0;
  top: 0;
  padding: calc(var(--size-bezel) * 0.75) calc(var(--size-bezel) * .5);
  margin: calc(var(--size-bezel) * 0.75 + 3px) calc(var(--size-bezel) * .5);
  white-space: nowrap;
  transform: translate(0, 0);
  transform-origin: 0 0;
  background: var(--color-background);
  transition: transform 120ms ease-in;
  font-weight: bold;
  line-height: 1.2;
  color: var(--color-alert);
}
.input__field {
  box-sizing: border-box;
  display: block;
  width: 100%;
  border: 3px solid currentColor;
  padding: calc(var(--size-bezel) * 1.5) var(--size-bezel);
  color: currentColor;
  background: transparent;
  border-radius: var(--size-radius);
  margin-bottom: 20px;
}
.input__field:not(:-moz-placeholder-shown) + .input__label {
  transform: translate(0.25rem, -65%) scale(0.8);
  color: var(--color-accent);
}
.input__field:not(:-ms-input-placeholder) + .input__label {
  transform: translate(0.25rem, -65%) scale(0.8);
  color: var(--color-accent);
}
.input__field:focus + .input__label, .input__field:not(:placeholder-shown) + .input__label {
  transform: translate(0.25rem, -65%) scale(0.8);
  color: var(--color-accent);
}

.formula {
  margin-top: 20px;
  font-size: 1rem;
  display: none;
}

.formula.show {
  display: block;
  padding: 10px;
  margin-top: 20px;
}

.formula p {
  margin: 0;
  font-size: 12px;
  text-align: center;
  padding: 5px;
}

.button-group {
  margin-top: calc(var(--size-bezel) * 2.5);
  display: flex;
  justify-content: space-between;
  padding-top: 15px;
}

button {
  color: currentColor;
  padding: var(--size-bezel) calc(var(--size-bezel) * 2);
  background: var(--color-accent);
  border: none;
  border-radius: var(--size-radius);
  font-weight: 900;
  display: block;
  margin: 0 auto;
  box-shadow: 0.3rem 0.3rem 0 var(--color-shadow, currentColor);
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  flex: 0.5;
}

button:hover {
  transform: scale(1.1);
  opacity: 90%;
} 

button:after {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: all 0.5s;
  box-shadow: 0 0 10px 10px var(--color-dark);
  pointer-events: none;
}

button:active:after {
  box-shadow: 0 0 0 0 var(--color-light);
  position: absolute;
  left: 0;
  top: 0;
  opacity: 1;
  transition: 0s;
}

button + button {
  margin-left: calc(var(--size-bezel) * 2);
}

.fade-in-text {
  animation: fade-in 0.5s forwards;
}

#colorRuler {
  width: 80%;
  height: 20px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}

.colorSegment {
  flex: 1;
  height: 100%;
  margin-top: -10px;
}

.arrow {
  display: none;
  font-size: 24px;
  margin-top: 35px;
}

.colorSegment:hover .arrow {
  display: inline-block;
  color: var(--color-background);
}

#colorRuler .colorSegment {
  display: flex;
  justify-content: center;
  align-items: center;
}

#underweight {
  background-color: var(--color-ocean);
}

#normal {
  background-color: var(--color-grass);
}

#overweight {
  background-color: var(--color-signal);
}

#obese {
  background-color: var(--color-alert);
}

@keyframes fade-in {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 767px) {
  .card {
    width: 100%;
  }

  .input__field {
    padding: calc(var(--size-bezel) * 1.2) var(--size-bezel);
    margin-bottom: 10px;
  }

  h2 {
    font-size: 16px;
  }

  p, .formula p{
    text-align: center;
  }

  button {
    padding: calc(var(--size-bezel) * 1) calc(var(--size-bezel) * 1.5);
    font-size: 5px;
    width: 30%;
  }

  #colorRuler {
    width: 100%;
    padding-top: 10px;
  }

  .button-group {
    margin-top: calc(var(--size-bezel) * 1.5);
    display: flex;
    flex-direction: row;
    align-items: center;
    padding-top: 0;
    justify-content: center;
  }

  #result{
    text-align: center;
  }
}