:root{
  --blue:#0747a6;
  --bg:#f4f5f7;
  --panel:#ffffff;
  --border:#dfe1e6;
  --text:#172b4d;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:Segoe UI, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
}

.topbar{
  height:56px;
  background:var(--blue);
  color:#fff;
  display:flex;
  align-items:center;
  padding:0 16px;
  gap:16px;
}

.topbar .brand{
  font-weight:600;
  font-size:18px;
}

.topbar select, .topbar button{
  height:36px;
  border-radius:6px;
  border:none;
  padding:0 10px;
  font-size:14px;
}

.topbar button{
  cursor:pointer;
}

.layout{
  display:flex;
  height:calc(100vh - 56px);
}

.sidebar{
  width:300px;
  background:var(--panel);
  border-right:1px solid var(--border);
  padding:16px;
}

.content{
  flex:1;
  padding:24px;
  overflow:auto;
}

.content .card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:8px;
  padding:24px;
}

.section-title{
  font-size:20px;
  margin-bottom:16px;
}

.small{
  font-size:13px;
  color:#6b778c;
}