* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Space Mono", monospace;
  background-color: hsl(185, 41%, 84%);
}

.logo {
  margin: 150px 0 100px;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

section {
  margin: 0 auto 50px ;
  width: 800px;
  display: flex;
  justify-content: center;
  background-color: white;
  gap: 40px;
  padding: 30px;
  border-radius: 20px;
  overflow: hidden;
}
@media (max-width:767px) {
  .logo {
    margin: 50px 0;
  }
  section {
    flex-flow: column;
    width: 375px;
  }
}
section > div {
  flex: 1;
}
.left label {
  color: hsl(186, 14%, 43%);
  display: block;
  font-size: 14px;
  font-weight: bold;
}
.left .input {
  position: relative;
}
.left input {
  background-color: hsl(189, 41%, 97%);
  text-align: end;
  border: none;
  margin: 10px 0;
  border-radius: 6px;
  width: 100%;
  height: 40px;
  font-size: 24px;
  color: hsl(183, 100%, 15%);
  font-weight: bold;
  padding: 20px 10px;
}
.left .error {
  color: rgba(255, 0, 0, 0.664);
  position: absolute;
  top: 0;
  right: 0;
  display: none;
}
.left img {
  position: absolute;
  width: 12px;
  top: 37px;
  left: 15px;
}
.left > label,
.left .people label:first-child {
  margin-top: 40px;
}

.discount {
  display: grid;
  grid-template-columns: repeat(auto-fill,minmax(100px, 1fr));
  gap: 10px;
  padding-top: 10px;
}
.discount .card,
.custom {
  background-color: hsl(183, 100%, 15%);
  color: hsl(189, 41%, 97%);
  padding: 10px 30px;
  border-radius: 6px;
  font-size: 22px;
  font-weight: bold;
  text-align: center;
  height: fit-content;
  cursor: pointer;
  transition: 0.3s;
}
.discount .card:hover,
.card.active {
  background-color: hsl(172, 67%, 45%);
  color: hsl(183, 100%, 15%);
}
.discount .custom {
  color: hsl(186, 14%, 43%);
  background-color: hsl(189, 41%, 97%);
  padding: 10px 0;
  text-align: center;
  margin-top: 2px;
  /* font-size: 20px; */
}
.discount .custom::placeholder {
  color: hsl(186, 14%, 43%);
}
.right {
  background-color: hsl(183, 100%, 15%);
  color: white;
  border-radius: 20px;
  padding: 30px;
  display: flex;
  flex-flow: column;
  justify-content: space-between;
}
.reset {
  color: hsl(183, 100%, 15%);
  background-color: hsl(172, 67%, 45%);
  font-weight: bold;
  font-size: 20px;
  text-align: center;
  padding: 10px;
  border-radius: 6px;
  text-transform: uppercase;
  cursor: pointer;
  transition: 0.3s;
}
.reset:hover {
  background-color: hsl(185, 41%, 84%);
}
.right span {
  display: block;
}
.right .tip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 50px;
  margin-top: 20px;
}
.right h1 {
  color: hsl(172, 67%, 45%);
  font-size: 40px;
  margin: 0;
}
.right h4 {
  color: hsl(185, 41%, 84%);
}
.right span {
  font-size: 13px;
  color: hsl(186, 14%, 43%);
  margin-top: 5px;
}
@media (max-width:767px) {
  .right h1 {
    font-size: 30px;
  }
  .right h4 {
    font-size: 15px;
  }
  
}