:root {
  --Strong-cyan: hsl(172, 67%, 45%);
  --Very-dark-cyan: hsl(183, 100%, 15%);
  --Dark-grayish-cyan: hsl(186, 14%, 43%);
  --Grayish-cyan: hsl(184, 14%, 56%);
  --Light-grayish-cyan: hsl(185, 41%, 84%);
  --Very-light-grayish-cyan: hsl(189, 41%, 97%);
  --White: hsl(0, 0%, 100%);
}

* {
  box-sizing: border-box;
  margin: 0px;
  padding: 0px;
}

html {
  display: flex;
  justify-content: center;
  align-items: center;
}

body {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  font-family: 'Space Mono';
  font-weight: 700;
  background-color: var(--Light-grayish-cyan);
}

#logo {
  margin-bottom: 64px;
}

.container {
  width: 700px;
  height: 405px;
  box-sizing: border-box;
  border-radius: 16px;
  background-color: var(--White);
  display: grid;
  grid-template: 1fr / 1fr 1fr;
  gap: 32px
}

p {
  font-size: 14px;
  color: var(--Very-dark-cyan);
  margin-bottom: 8px;
  margin-top: 0px;
}

input {
  width: 300px;
  height: 45px;
  font-size: 19.2px;
}

/* INPUT */
.container__input {
  grid-area: 1 / 1;
  margin: 32px 0px 32px 32px;
}

.container__input--group {
  position: relative;
}

.container__input--group img {
  position: absolute;
  top: 14px;
  left: 10px;
}

.container__input p {
  position: relative;
}

.container__input span {
  position: absolute;
  color: rgb(255, 0, 0);
  right: 0;
  visibility: hidden;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.container__input--group input {
  direction: rtl;
  text-align: right;
  font-family: 'Space Mono';
  font-size: 19.2px;
  padding: 8px 8px 8px 28px;
  border: none;
  background-color: var(--Very-light-grayish-cyan);
  color: var(--Very-dark-cyan);
}

input:focus {
  outline-color: var(--Light-grayish-cyan);
}

#billInput {
  margin-bottom: 32px;
}

.container__input--button-group {
  font-size: 0px;
  margin-bottom: 16px;
}

.container__input button {
  width: 90px;
  height: 42px;
  background-color: var(--Very-dark-cyan);
  border-radius: 7px;
  border: none;
  font-size: 17.6px;
  color: var(--White);
  font-family: 'Space Mono';
  margin: 0px 10px 16px 0px;
}

.container__input button:hover {
  background-color: var(--Strong-cyan);
  color: var(--Very-dark-cyan);
  
}

.container__input--button-group input {
  width: 90px;
  height: 40px;
  text-align: center;
  font-family: 'Space Mono';
  font-size: 19.2px;
  padding: 8px;
  border: none;
  background-color: var(--Very-light-grayish-cyan);
}

/* OUTPUT */
.container__output {
  grid-area: 1 / 2;
  background-color: var(--Very-dark-cyan);
  display: flex;
  flex-direction: column;
  margin: 32px 32px 32px 0px;
  padding: 32px;
  border-radius: 16px;
  position: relative;
}

.container__output--tip {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  margin-bottom: 32px;
}

.container__output--total {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.container__output p {
  display: flex;
  flex-direction: column;
  font-size: 16px;
  color: var(--White);
}

.container__output span {
  font-size: 12px;
  color: var(--Dark-grayish-cyan);
}

p.container__output--price {
  font-size: 32px;
  color: var(--Strong-cyan);
}

.container__output button {
  width: 239px;
  height: 36px;
  padding: 8px;
  font-family: 'Space Mono';
  font-size: 16px;
  position: absolute;
  bottom: 32px;
  background-color: var(--Strong-cyan);
  color: var(--Very-dark-cyan);
  border: none;
  border-radius: 4px;
}

.container__output button:hover {
  background-color: var(--Light-grayish-cyan);
}

@media (max-width: 700px) {
  body {
    justify-content: start;
  }

  #logo {
    margin-top: 64px;
  }

  .container {
    width: 100%;
    height: auto;
    display: grid;
    grid-template: 1fr 1fr / 1fr;
  }

  .container__input {
    height: auto;
    grid-area: 1 / 1;
  }

  .container__input span {
    right: 32px;
  }

  .container__input--button-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-right: 32px;
  }

  .container__input--button-group button {
    margin: 0px 0px 18px 0px;
  }

  .container__input--group input {
    width: calc(100% - 32px);
  }

  .container__output {
    width: auto;
    height: auto;
    grid-area: 2 / 1;
    margin: 32px
  }

  .container__input--group {
    width: 100%;
  }

  .container__output button {
    width: calc(100% - 64px);
  }
}