body { font-family: sans-serif; background-color: #f4f4f9; display: flex; justify-content: center; padding: 20px; }
.container { background: white; padding: 25px; border-radius: 8px; box-shadow: 0 4px 10px rgba(0,0,0,0.1); width: 400px; }
h2 { color: #333; font-size: 1.2rem; }
input { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box; }
button { width: 100%; padding: 12px; background: #28a745; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 1rem; }
button:hover { background: #218838; }
.result-box { margin-top: 20px; padding: 15px; background: #e9ecef; border-radius: 4px; font-weight: bold; text-align: center; font-size: 1.2rem; }
#finalPrice { color: #d9534f; }