:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:#213547;background-color:#fff}body{margin:0;display:flex;justify-content:center;min-height:100vh;padding:2rem}#app{max-width:600px;width:100%;margin:0 auto}h1{font-size:2.5em;text-align:center;margin-bottom:2rem}.section{margin:2rem 0;padding:2rem;border:2px solid #e0e0e0;border-radius:12px;background:#f9f9f9}.section h2{margin-top:0;color:#1a73e8}input{padding:12px;margin-right:10px;width:100%;max-width:300px;border:2px solid #ddd;border-radius:6px;font-size:16px;box-sizing:border-box}input:focus{outline:none;border-color:#1a73e8}button{padding:12px 24px;background:#1a73e8;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:16px;font-weight:500;transition:background .2s}button:hover{background:#1557b0}button:active{background:#0d47a1}button:disabled{background:#ccc;cursor:not-allowed}#status{margin-top:2rem;padding:1rem;border-radius:8px;font-weight:500;display:none}#status.visible{display:block}#status.success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}#status.error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}