body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f5f5f5;}
.login-container{max-width:360px;margin:40px auto;padding:20px;background:#fff;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.1);}
.login-container h1{text-align:center;margin-bottom:20px;font-size:20px;}
.login-container input{width:100%;padding:8px;margin-bottom:12px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box;}
.login-container button{width:100%;padding:10px;border:none;border-radius:4px;background:#4caf50;color:#fff;font-size:16px;}
.error{background:#ffcdd2;padding:8px;border-radius:4px;margin-bottom:10px;font-size:14px;color:#b71c1c;}