.fafc{max-width:700px;margin:auto;padding:20px;font-family:Arial,sans-serif;box-sizing:border-box;color:#222}.fafc input{width:100%;padding:12px;border:1px solid #ccc;border-radius:10px;margin:6px 0 15px;box-sizing:border-box}.buttons{display:flex;gap:10px;flex-wrap:wrap}.buttons button{padding:12px 15px;border:0;border-radius:8px;cursor:pointer}.result{margin-top:25px;padding:20px;background:#f1f3f5;border-radius:12px}.result #result{font-size:30px;font-weight:700}@media(max-width:600px){.buttons button{width:100%}}