:root{--bg:#f4f6f9;--sidebar:#1f2d3d;--card:#fff;--text:#1f2d3d;--primary:#3c8dbc}
*{box-sizing:border-box;font-family:Arial,sans-serif}
body{margin:0;background:var(--bg);color:var(--text)}
.wrapper{display:flex;min-height:100vh}
.sidebar{width:250px;background:var(--sidebar);color:#fff;padding:20px}
.sidebar a{display:block;color:#d2d6de;text-decoration:none;padding:8px 0}
.sidebar button{margin-top:10px;padding:8px 12px;border:0;background:var(--primary);color:#fff;cursor:pointer}
.content{flex:1;padding:24px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.card{background:var(--card);padding:16px;border-radius:8px;box-shadow:0 1px 4px rgba(0,0,0,.1);margin-bottom:16px}
label{display:block;margin-bottom:10px}
input,select,textarea{display:block;width:100%;padding:8px;margin-top:4px;margin-bottom:10px}
button{padding:8px 12px;border:0;background:var(--primary);color:#fff;cursor:pointer;border-radius:4px}
.inline-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.inline-form input,.inline-form select{width:auto;min-width:180px;margin:0}
.alert{padding:10px;border-radius:6px;margin-bottom:10px}
.alert-error{background:#f8d7da}
.alert-success{background:#d1e7dd}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:10px;border:1px solid #e6e6e6;text-align:left;vertical-align:top}
.message-item{padding:8px;border:1px solid #e6e6e6;border-radius:6px;margin-bottom:8px;background:#fff}