:root {
  --primary-cyan: hsl(172, 67%, 45%);

  --dark-cyan: hsl(183, 100%, 15%);
  --Dark-grayish-cyan: hsl(186, 14%, 43%);
  --Dark-grayish-cyan-two: hsl(184, 14%, 56%);
  --Light-grayish-cyan: hsl(185, 41%, 84%);
  --Light-grayish-cyan-two: hsl(189, 41%, 97%);
  --White: hsl(0, 0%, 100%);
}

html {
  font-size: 62.5%;
}

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

body {
  height: 100vh;
  width: 100%;
  background-color: var(--Light-grayish-cyan);
  font-family: "Space Mono", monospace;
  font-size: 2.4rem;
}

.logo {
  text-align: center;
  margin: 4rem 0;
}

.tip-calculator {
  background-color: var(--White);
  display: flex;
  flex-direction: column;
  padding: 2.3rem;
  border-radius: 1.5rem;
}

label {
  color: var(--Dark-grayish-cyan);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

input {
  border: none;
  outline: none;
  padding: 0.5rem;
  padding-right: 1.8rem;
  background-position: 1.7rem 1.5rem;
  background-repeat: no-repeat;
  background-color: var(--Light-grayish-cyan-two);
  text-align: right;
  color: var(--dark-cyan);
  font-weight: 700;
  font-family: inherit;
  font-size: inherit;
  border-radius: 0.6rem;
}

input:hover {
  border: 3px solid var(--primary-cyan);
}

.bill-input {
  display: block;
  width: 100%;
  background-image: url("images/icon-dollar.svg");
  margin-bottom: 3.6rem;
}

.tip {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(2, 1fr);
  margin: 2rem 0;
  gap: 0.2em 1.2rem;
}

.tips {
  background-color: var(--dark-cyan);
  color: var(--White);
  height: 5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 0.4rem;
  cursor: pointer;
}

.tips:hover {
  background-color: var(--primary-cyan);
}

.tips:hover,
.reset:hover,
input,
.reset {
  transition: background 0.2s;
}

.active-tip {
  color: var(--dark-cyan);
  background-color: var(--primary-cyan);
  font-weight: bolder;
}

.people-input {
  background-image: url("images/icon-person.svg");
  margin-bottom: 2.5rem;
  width: 100%;
}

.result {
  background-color: var(--dark-cyan);
  color: var(--White);
  border-radius: 1.2rem;
  padding: 3.9rem 2.1rem;
}

.tip-amount,
.total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.person {
  font-size: 1.2rem;
  color: var(--Dark-grayish-cyan-two);
  font-weight: 700;
}

.amount {
  font-size: 2.8rem;
  color: var(--primary-cyan);
  font-weight: 700;
}

.reset {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark-cyan);
  background-color: var(--primary-cyan);
  padding: 0.9rem 0;
  border-radius: 0.5rem;
  cursor: pointer;
}

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

#tip-custom input {
  width: 100%;
  text-align: center;
  font-size: inherit;
  padding: 1rem;
  font-weight: 700;
  font-family: inherit;
}

.people-label {
  display: flex;
  justify-content: space-between;
}

.error {
  color: red;
  display: none;
}

@media screen and (min-width: 768px) {
  body {
    padding: 10rem 15rem;
    height: 100%;
  }
}

@media screen and (min-width: 1000px) {
  body {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10rem;
    height: 100%;
  }

  input {
    width: 4.15rem;
    padding: 1rem;
    background-position: 1.7rem 1.8rem;
  }

  .tip-calculator {
    width: 100%;
    flex-direction: row;
    column-gap: 4rem;
    border-radius: 1.5rem;
    padding: 2.5rem;
  }

  .part-one {
    display: flex;
    flex-direction: column;
    margin: 1rem 0 0 1.3rem;
  }

  .bill-input {
    margin-bottom: 3.4rem;
  }

  .tip {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem 1.8rem;
    margin-bottom: 3.5rem;
  }

  .tips {
    height: 5.5rem;
  }

  .result {
    margin: 0 auto;
    width: 90%;
    display: flex;
    flex-direction: column;
    align-content: space-between;
    padding: 4.8rem 3.8rem;
  }

  .amount {
    font-size: 5rem;
  }

  .tip-amount {
    column-gap: 4rem;
  }

  .reset {
    padding: 1.3rem 0;
    margin: auto 0;
    position: relative;
    top: 7rem;
  }
}

@media screen and (min-width: 1200px) {
  body {
    padding: 6rem 20rem 10rem;
  }
}