*{margin:0; padding:0; font-family:Arial; box-sizing:border-box;}
body{background:#e8f5e9; display:flex; justify-content:center; align-items:center; min-height:100vh;}
.kotak-login{background:white; padding:25px; border-radius:8px; width:360px; box-shadow:0 0 8px rgba(0,0,0,0.1);}
h2{text-align:center; color:#2c5c2c; margin-bottom:5px;}
h3{text-align:center; color:#444; margin-bottom:20px; font-size:15px;}
input{width:100%; padding:10px; margin:8px 0; border:1px solid #ccc; border-radius:4px;}
button{width:100%; padding:10px; background:#2c5c2c; color:white; border:none; border-radius:4px; cursor:pointer; font-weight:bold; margin-top:5px;}
.eror{padding:8px; background:#ffebee; color:#c62828; border-radius:4px; margin-bottom:10px; text-align:center;}