* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  min-height: 100vh;
  background: rgb(142, 219, 255);
  display: flex;
  align-items: center;
  justify-content: center;
}
.container {
  width: 1200px;
  padding: 10%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 30px;
}
.card {
  width: 600px;
  min-height: 550px;
  background-color: rgb(255, 255, 255);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 0.5rem 2rem;
  color: rgb(56, 56, 56);
  /* align-items: center; */
  /* justify-content: center; */
  box-shadow: 20px 25px 20px rgba(225, 0, 255, 0.25);
}
.card h1 {
  text-align: center;
  font-size: 36px;
  padding: 0.2rem;
  margin-top: 10px;
}
.card .horizontal-line {
  border: 1px solid rgb(189, 189, 189);
  width: 90%;
  margin: 0 auto;
  opacity: 0.3;
}

.card .bill {
  display: flex;
  flex-direction: column;
  margin-top: 20px;
}
.bill p {
  font-size: 20px;
  font-weight: 700;
}
.bill_amount {
  font-size: 30px;
  display: flex;
  align-items: center;
}
.bill_amount .money {
  width: 5%;
  background-color: rgb(214, 214, 214);
  text-align: center;
  border-radius: 5px;
  padding: 0.4rem;
  border-start-end-radius: 0;
  border-end-end-radius: 0;
}
.card input {
  flex: 1;
  padding: 0.45rem;
  border: 1px solid grey;
  font-size: 20px;
  border-start-end-radius: 5px;
  border-end-end-radius: 5px;
}
.result_container {
  margin: 20px 0;
  display: flex;
  gap: 20px;
}
.result_container .result_box {
  background-color: rgba(0, 255, 55, 0.2);
  width: 50%;
  padding: 1rem;
  text-align: center;
  border-radius: 15px;
}
.result_container .result_box .amount {
  font-size: 40px;
  color: green;
}
.button-container {
  display: flex;
  gap: 20px;
  justify-content: center;
  padding: 1rem;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.btn {
  border: none;
  cursor: pointer;
  padding: 12px 24px;
  border-radius: 20px;
  background: rgb(211, 211, 211);
  font-size: 15px;
  color: rgb(83, 83, 83);
  box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.25);
  transition: all 0.3s ease;
  font-size: 25px;
}
.btn:hover {
  box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.65);
}
.btn-active {
  background-color: green;
  color: white;
}

@media (max-width: 768px) {
  .card {
    width: 400px;
    min-height: 540px;
  }
  .card h1 {
    font-size: 30px;
  }
  .result_container .result_box .amount {
    font-size: 25px;
  }

  /* .card p {
    padding: 0 0.8rem 0.8rem;
    font-size: 40px;
  } */
}