* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: #f4f6f9;
  color: #1f2937;
}
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: #111827;
  color: #fff;
  padding: 20px 0;
  flex-shrink: 0;
}
.sidebar .brand { font-weight: 700; font-size: 18px; padding: 0 20px 20px; }
.sidebar nav a {
  display: block;
  padding: 12px 20px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
}
.sidebar nav a:hover, .sidebar nav a.active { background: #1f2937; color: #fff; }
.content { flex: 1; padding: 30px; max-width: 1000px; }
h1 { margin-top: 0; }
.cards { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 30px; }
.card {
  background: #fff; border-radius: 10px; padding: 18px 22px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08); min-width: 140px;
  display: flex; flex-direction: column;
}
.card .num { font-size: 28px; font-weight: 700; }
.card span:last-child { font-size: 13px; color: #6b7280; margin-top: 4px; }
.table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; margin-bottom: 30px; }
.table th, .table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid #eef0f3; font-size: 14px; }
.table th { background: #f9fafb; font-weight: 600; }
.form-box { background: #fff; padding: 20px; border-radius: 10px; max-width: 500px; margin-bottom: 30px; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
.form-box label { display: block; margin: 12px 0 4px; font-size: 13px; font-weight: 600; color: #374151; }
.form-box input, .form-box select, .form-box textarea {
  width: 100%; padding: 9px 10px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 14px;
}
.form-box button, .table button {
  margin-top: 16px; background: #2563eb; color: #fff; border: none; padding: 10px 16px;
  border-radius: 6px; cursor: pointer; font-size: 14px;
}
.table button { margin-top: 0; padding: 6px 10px; font-size: 12px; }
.table button.danger, .form-box button.danger { background: #dc2626; }
.filters { margin-bottom: 16px; }
.btn { display: inline-block; padding: 8px 14px; background: #fff; border: 1px solid #d1d5db; border-radius: 6px; text-decoration: none; color: #374151; margin-right: 8px; font-size: 13px; }
.btn.active { background: #2563eb; color: #fff; border-color: #2563eb; }
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; background: #ecfdf5; color: #065f46; font-size: 14px; }
.alert.error { background: #fef2f2; color: #991b1b; }
.alert.success { background: #ecfdf5; color: #065f46; }
.notice { background: #eff6ff; color: #1e40af; padding: 12px 16px; border-radius: 6px; font-size: 13px; }
.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; background: #111827; }
.login-box { background: #fff; padding: 32px; border-radius: 10px; width: 320px; }
.login-box h2 { margin-top: 0; }
.login-box label { display: block; margin: 12px 0 4px; font-size: 13px; font-weight: 600; }
.login-box input { width: 100%; padding: 10px; border: 1px solid #d1d5db; border-radius: 6px; }
.login-box button { width: 100%; margin-top: 20px; background: #2563eb; color: #fff; border: none; padding: 11px; border-radius: 6px; cursor: pointer; font-size: 15px; }
.nav-badge {
  background: #ef4444; color: #fff; border-radius: 10px; padding: 1px 7px;
  font-size: 11px; font-weight: 700; margin-left: 4px;
}
.sidebar-search { padding: 0 20px 16px; }
.sidebar-search input {
  width: 100%; padding: 8px 10px; border-radius: 6px; border: 1px solid #374151;
  background: #1f2937; color: #fff; font-size: 13px; box-sizing: border-box;
}
.sidebar-search input::placeholder { color: #9ca3af; }