* {
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  margin: 20px;
  background: #f5f5f5;
}

h1 {
  margin-bottom: 20px;
}

.panel {
  background: #fff;
  padding: 16px;
  margin-bottom: 20px;
  border-radius: 6px;
}

.field {
  margin-bottom: 10px;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

input {
  width: 100%;
  padding: 6px;
}

button {
  padding: 8px 12px;
  cursor: pointer;
}

.list {
  margin-top: 16px;
  border-top: 1px solid #ddd;
}

.list-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}

.total {
  margin-top: 12px;
  font-size: 1.1rem;
}