.tile-calculator{max-width:600px;margin:20px auto;padding:20px;border:1px solid #ddd;border-radius:5px;background:#f9f9f9}.tile-calculator h3{color:#333;margin-bottom:15px}.tile-calculator .form-group{margin-bottom:15px}.tile-calculator label{display:block;margin-bottom:5px;font-weight:700}.tile-calculator input,.tile-calculator select{width:100%;padding:8px;border:1px solid #ccc;border-radius:4px}.tile-calculator button{padding:10px 15px;margin-right:10px;background:#0073aa;color:#fff;border:none;border-radius:4px;cursor:pointer}.tile-calculator button:hover{background:#005a87}.tile-calculator button[type=reset]{background:#ccc}.tile-calculator button[type=reset]:hover{background:#aaa}