:root {
  --blue: #005BAA;
  --orange: #FF7A00;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: var(--bg); color: var(--text); }
.topbar { height: 64px; background: var(--blue); color: white; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; }
.brand { font-weight: 800; font-size: 20px; }
.layout { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 64px); }
.sidebar { background: white; border-right: 1px solid var(--border); padding: 18px; }
.sidebar a { display: block; padding: 12px 14px; margin-bottom: 6px; color: var(--text); text-decoration: none; border-radius: 10px; }
.sidebar a:hover, .sidebar a.active { background: #eef6ff; color: var(--blue); font-weight: 700; }
.main { padding: 24px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: 0 8px 22px rgba(15,23,42,.06); }
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.btn { background: var(--blue); color: white; border: 0; border-radius: 10px; padding: 10px 14px; font-weight: 700; cursor: pointer; }
.btn.orange { background: var(--orange); }
input, select, textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: white; }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
table { width: 100%; border-collapse: collapse; background: white; border-radius: 12px; overflow: hidden; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--border); text-align: left; }
th { background: #f9fafb; font-size: 13px; color: var(--muted); }
.login-page { min-height: 100vh; display: grid; place-items: center; }
.login-box { width: 380px; }