body {
    background-color: #f5f5f5;
    font-family: Arial, sans-serif;
}
.main-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.calculator-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 30px;
    width: 100%;
    max-width: 75%;
}
.result-box {
    background-color: #efefef;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    padding: 15px;
    margin-top: 20px;
    text-align: center;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.person-panel {
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  align-items: center;
}

.person-panel > div {
  width: 50%;
  display: flex;
  flex-direction: row;
  align-items: center;
  margin: 10px;
}

.person-panel > div > label {
  width: 35%;
  margin-bottom: 0;
}

.add-person-panel {
  display: flex;
  flex-direction: row;
  justify-content: flex-end;
  align-items: center;
}

.add-person-panel > button {
  margin-right: 10px;
}

.button-panel {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}

label.error {
  font-size: 10pt;
  color: rgb(158, 5, 5);
  margin-left: 2px;
}

input.error {
  border-color: rgb(158, 5, 5);
}