body {
  font-family: "Roboto", sans-serif;
  background: #f4f6f9;
  margin: 0;
}

.container {
  display: flex;
  justify-content: center;
  padding: 40px;
}

.card {
  max-width: 440px;
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  width: 100%;
}

.product {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}

.product img {
  width: 100px;
  border-radius: 10px;
}

.section {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
}

input[type="number"] {
  width: 100%;
  padding: 8px;
}

.summary {
  background: #f1f3f5;
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 20px;
}

button {
  width: 100%;
  padding: 8px 16px;
  background: #007bff;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 30px;
  font-family: Roboto;
}

button:hover {
  background: #0056b3;
}

.error {
  color: red;
  font-size: 12px;
}

#confirmation {
  margin-top: 20px;
  padding: 10px;
  background: #e6ffed;
  border-radius: 8px;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
}
* {
  box-sizing: border-box;
}
.btn-group {
  display: flex;
  gap: 10px;
}

.btn-group button {
  flex: 1;
}
#resetBtn {
  background: #9c9c9c;
}