:root {
  /* Typography */
  --form-inputs: 24px;

  /* Primary Colors */
  --green-400: hsl(172, 67%, 45%);

  /* Neutral Colors */
  --green-900: hsl(183, 100%, 15%);
  --grey-500: hsl(186, 14%, 43%);
  --grey-400: hsl(184, 14%, 56%);
  --grey-200: hsl(185, 41%, 84%);
  --grey-50: hsl(189, 47%, 97%);
  --white: hsl(0, 100%, 100%);
}

*,
*::before,
*::after {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html,
body {
  background-color: var(--grey-200);
  font-family: "Space Mono", monospace;
  font-weight: 700;
}

main {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 3rem;
}

.container {
  background-color: var(--white);
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  max-width: 60rem;
  border-radius: 1rem;
}

.calc-section {
  padding: 3rem;
  color: var(--grey-500);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.input-box {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.input-sect p {
  margin-bottom: 0.3rem;
}
.input-box > input {
  font-family: "Space Mono", monospace;
  font-weight: 700;
  border-radius: 0.3rem;
  width: 100%;
  text-align: right;
  font-size: var(--form-inputs);
  color: var(--green-900);
  background-color: var(--grey-50);
  border: none;
}
.input-box > input:focus {
  outline: none;
}
.input-box:not(.tip-sect):focus-within {
  outline: 2px solid var(--green-400);
}
.input-box:not(.tip-sect) {
  padding: 0.3rem 0 0.3rem 1rem;
  background-color: var(--grey-50);
  border-radius: 0.5rem;
}

.tips-sect {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}

.tips-sect > input {
  font-family: "Space Mono", monospace;
  font-weight: 700;
  padding: 0.5rem 1rem;
  width: 7.2rem;
  border-radius: 0.5rem;
  font-size: 1.3rem;
  background-color: var(--grey-50);
  color: var(--green-900);
  text-align: right;
}
.tips-sect > input:focus {
  outline: 2px solid var(--green-400);
}

.tips {
  font-family: "Space Mono", monospace;
  font-weight: 700;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1.3rem;
  background-color: var(--green-900);
  color: var(--grey-50);
}
.tips.custom-tip {
  background-color: var(--grey-50);
  color: var(--grey-500);
}
.tips:hover {
  background-color: var(--grey-200);
  color: var(--green-900);
  cursor: pointer;
}


.result-section {
  background-color: var(--green-900);
  color: var(--grey-50);
  padding: 3rem 2.5rem;
  margin: 2rem;
  border-radius: 1rem;
  display: flex;
  gap: 6rem;
  flex-direction: column;
}

.results {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.per-person {
  color: var(--grey-200);
}

.result-numbers {
  color: var(--green-400);
  font-size: 2.5rem;
}

.reset-btn {
  font-family: "Space Mono", monospace;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 1.5rem;
  padding: 0.8rem 1rem;
  border: none;
  border-radius: 0.5rem;
  color: var(--green-900);
  background-color: var(--green-400);
}

.reset-btn[disabled], .reset-btn[disabled]:hover {
  background-color: hsl(183, 79%, 24%);
  cursor: not-allowed;
}

.reset-btn:hover {
  background-color: var(--grey-200);
  cursor: pointer;
}

.selected {
  background-color: var(--green-400);
  color: var(--green-900);
}

@media screen and (max-width: 43rem) {
  main {
    height: auto;
    /* min-height: 100vh; */
    display: block;
    text-align: center;
    margin: 4rem auto 0;
  }

  .container {
    grid-template-columns: 1fr;
    text-align: left;
    gap: 2rem;
    margin-top: 4rem;
    border-radius: 1rem 1rem 0 0;
  }

  .calc-section {
    gap: 2rem;
    padding-bottom: 0;
  }

  .tips-sect {
    grid-template-columns: 1fr 1fr;
  }

  .result-section {
    padding: 2rem 1.5rem;
    gap: 2rem;
  }
}