body{margin:0;font-family:Arial,sans-serif;display:flex;background:#f6f9fc}
.sidebar{width:220px;background:#1a1f36;color:#fff;padding:1rem;height:100vh;overflow:auto}
.sidebar h1{margin-top:0;font-size:1.2rem}
.sidebar a{color:#cfd8fc;text-decoration:none;display:block;padding:.5rem;border-radius:4px}
.sidebar a.active,.sidebar a:hover{background:#2e344e;color:#fff}
.submenu{margin-left:1rem}
.main{flex:1;padding:1rem;overflow:auto}
.card{background:#fff;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.1);padding:1rem;margin-bottom:1rem}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:.5rem;border-bottom:1px solid #eee}
.actions .btn{display:inline-block;margin-right:.5rem;padding:.3rem .6rem;background:#0275d8;color:#fff;text-decoration:none;border-radius:4px}
.actions .btn:hover{background:#025aa5}