.result,h1{text-align:center;color:#2c3e50}.container{padding:20px;border-radius:10px;box-shadow:0 4px 6px rgba(0,0,0,.1);width:100%;max-width:400px;margin:30px auto}label{display:block;margin-bottom:8px;font-weight:700}.birthdate-inputs{display:flex;justify-content:space-between;margin-bottom:15px}.birthdate-inputs input,.birthdate-inputs select{width:30%;padding:10px;border:1px solid #ccc;border-radius:5px;font-size:16px;text-align:center}.inline-input{display:flex;justify-content:space-between}.inline-input input{width:41%;padding:11px}button{width:100%;padding:10px;background-color:#3498db;color:#fff;border:none;border-radius:5px;font-size:16px;cursor:pointer;margin-top:15px}button:hover{background-color:#2980b9}.result{font-size:18px;border:2px solid #3498db;padding:10px;border-radius:8px;background-color:#f9f9f9;margin-top:20px}.future-age-line1{margin-bottom:5px}.future-age-line2{color:#d35400;font-weight:700}