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

body {
  background: #f3f6fb;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.card {
  background: #fff;
  width: 100%;
  max-width: 420px;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
}

h2 {
  text-align: center;
  margin-bottom: 12px;
}

label {
  font-size: 13px;
  margin-top: 10px;
  display: block;
}

input, select, button {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 8px;
  border: 1px solid #ddd;
}

button {
  background: #5b5cf6;
  color: #fff;
  border: none;
  font-weight: 600;
  margin-top: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 13px;
}

th, td {
  padding: 6px;
  text-align: center;
  border-bottom: 1px solid #eee;
}

.base {
  background: #e9fbff;
  font-weight: bold;
}

.discount {
  color: red;
}

.markup {
  color: #000;
}

.bonus {
  border: 2px dashed #3cb371;
  padding: 10px;
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 12px;
  background: #f4fff8;
}

.hidden {
  display: none;
}