body{margin:0;font-family:Arial,sans-serif;background:#f4f6f9}
.login-page{display:flex;height:100vh;justify-content:center;align-items:center}
.login-box{background:#fff;padding:30px;border-radius:8px;width:350px;box-shadow:0 2px 10px rgba(0,0,0,.15)}
input,button{width:100%;padding:12px;margin:8px 0;box-sizing:border-box}
button{background:#007bff;color:#fff;border:0}
.sidebar{position:fixed;left:0;top:0;width:240px;height:100%;background:#343a40;color:#fff;padding:20px}
.sidebar a{display:block;color:#c2c7d0;text-decoration:none;padding:10px 0}
.content{margin-left:260px;padding:25px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.card{background:#fff;padding:20px;border-radius:6px}
table{width:100%;background:#fff;margin-top:20px;border-collapse:collapse}
th,td{padding:12px;border:1px solid #ddd}