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

:root {
  --soft-blue: #4a90e2;
  --dark-gray: #333;
  --light-blue: #b3d4fc;
  --cream: #f9f1e7;
}

body {
  background-color: var(--cream);
  color: var(--dark-gray);
  font-family: 'Arial', sans-serif;
}

main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 50px 20px;
}

.freecodecamp-logo {
  width: 100%;
  height: 40px;
  margin-bottom: 30px;
}

h1 {
  font-size: 3rem;
  margin: 30px 0;
  text-align: center;
  color: var(--soft-blue);
}

#change-due {
  text-align: left;
  font-size: 1.4rem;
  color: var(--dark-gray);
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.input-div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin: 20px 0;
}

label {
  font-size: 20px;
  margin-bottom: 10px;
}

.user-input {
  height: 35px;
  padding: 12px;
  margin: 15px;
  font-size: 16px;
  border: 2px solid var(--soft-blue);
  border-radius: 5px;
}

.price-screen {
  border: 12px solid var(--light-blue);
  background-color: var(--dark-gray);
  height: 60px;
  width: 220px;
  color: var(--cream);
  font-size: 1.5rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
}

#price {
  font-size: 1.7rem;
}

.connector {
  margin-top: 20px;
  background-color: var(--light-blue);
  height: 40px;
  width: 50px;
  border-radius: 5px;
}

.top-register {
  display: flex;
  justify-content: space-between;
  border-radius: 35px 35px 0 0;
  padding-top: 25px;
  background-color: var(--soft-blue);
  height: 270px;
  width: 350px;
}

.btns-container {
  width: 30%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn {
  border-radius: 50%;
  border: none;
  width: 25px;
  height: 25px;
  background-color: var(--dark-gray);
  margin: 5px;
}

.check-btn-styles {
  cursor: pointer;
  width: 120px;
  height: 35px;
  margin: 15px;
  color: var(--soft-blue);
  font-size: 20px;
  font-weight: bold;
  background-color: #ffe066;
  border: 2px solid var(--soft-blue);
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.cash-drawer-display {
  font-size: 1.2rem;
  background-color: var(--dark-gray);
  width: 60%;
  height: 100%;
  color: var(--cream);
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.bottom-register {
  background-color: var(--soft-blue);
  height: 60px;
  width: 350px;
  margin-top: 20px;
  border-radius: 0 0 35px 35px;
}

.circle {
  margin: 20px auto;
  border-radius: 50%;
  width: 25px;
  height: 25px;
  background-color: var(--dark-gray);
}