body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:#f0f2f5;color:#333;margin:0}main{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.card{background:#fff;border-radius:8px;box-shadow:0 4px 6px rgba(0,0,0,.1);padding:25px;margin-bottom:25px}h1{font-size:1.8em;color:#1c1e21}input[type=email],input[type=password]{width:100%;padding:12px;margin-bottom:15px;border:1px solid #ddd;border-radius:6px;box-sizing:border-box}button{width:100%;padding:12px;background-color:#007bff;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:1em;font-weight:700}button:hover{background-color:#0056b3}