body{margin:0;padding:40px 0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f4f7f6;display:flex;justify-content:center;align-items:flex-start;min-height:100vh}.container{background:#fff;width:100%;max-width:500px;padding:2.5rem;border-radius:16px;box-shadow:0 10px 25px #0000000d}h1{text-align:center;color:#1a202c;font-size:1.8rem;margin-bottom:.5rem}p.subtitle{text-align:center;color:#718096;margin-bottom:2rem;font-size:.95rem}form{display:flex;flex-direction:column;gap:1.2rem}.form-group{display:flex;flex-direction:column;gap:.5rem}label{font-weight:600;font-size:.9rem;color:#4a5568}input,select{padding:.8rem 1rem;border:1px solid #e2e8f0;border-radius:8px;font-size:1rem;background-color:#fff;transition:border-color .2s,box-shadow .2s}input:focus,select:focus{outline:none;border-color:#3182ce;box-shadow:0 0 0 3px #3182ce1a}button{margin-top:1rem;padding:1rem;background-color:#3182ce;color:#fff;font-size:1.1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:background-color .2s,transform .1s}button:hover{background-color:#2b6cb0}button:active{transform:scale(.98)}button:disabled{background-color:#cbd5e0;cursor:not-allowed}.result-box{margin-top:2rem;padding:1.5rem;background:#f0fff4;border:1px solid #c6f6d5;border-radius:12px;text-align:center;animation:fadeIn .5s ease-out}.result-box h3{margin:0;color:#2f855a;font-size:.9rem;text-transform:uppercase;letter-spacing:1px}.price{margin-top:.5rem;font-size:2.5rem;font-weight:800;color:#276749}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(min-width:600px){.grid-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}}