* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', sans-serif;
  background: #f5f5f5;
  color: #333;
  font-size: 14px;
}
a { color: #FF8C00; text-decoration: none; }
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: #1f1f1f;
  color: #fff;
  display: flex;
  flex-direction: column;
}
.brand {
  padding: 24px 20px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid #333;
}
.sidebar nav { flex: 1; padding: 12px 0; }
.sidebar nav a {
  display: block;
  padding: 12px 20px;
  color: #bbb;
}
.sidebar nav a.active, .sidebar nav a:hover {
  background: #FF8C00;
  color: #fff;
}
.sidebar-foot {
  padding: 16px 20px;
  border-top: 1px solid #333;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: #999;
}
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  background: #fff;
  padding: 16px 24px;
  border-bottom: 1px solid #eee;
}
.topbar h2 { font-size: 18px; }
.content { padding: 24px; flex: 1; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.stat-card .label { color: #999; font-size: 13px; }
.stat-card .value { font-size: 28px; font-weight: 700; margin-top: 8px; color: #FF8C00; }
.stat-card .sub { font-size: 12px; color: #999; margin-top: 4px; }
.panel {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  margin-bottom: 20px;
}
.panel h3 { font-size: 16px; margin-bottom: 16px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid #eee; font-size: 13px; }
th { background: #fafafa; color: #666; font-weight: 600; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}
.tag.ok { background: #E8F5E9; color: #4CAF50; }
.tag.no { background: #f5f5f5; color: #999; }
.tag.used { background: #FFEBEE; color: #F44336; }
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  text-decoration: none;
}
.btn-primary { background: #FF8C00; color: #fff; }
.btn-outline { background: #fff; color: #FF8C00; border: 1px solid #FF8C00; }
.btn-danger { background: #F44336; color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; margin-bottom: 6px; color: #666; font-size: 13px; }
.form-row input, .form-row textarea, .form-row select {
  width: 100%;
  max-width: 480px;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
}
.form-actions { margin-top: 20px; }
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert.success { background: #E8F5E9; color: #2E7D32; }
.alert.error { background: #FFEBEE; color: #C62828; }
.toolbar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.pagination { margin-top: 16px; }
.pagination a {
  display: inline-block;
  padding: 6px 12px;
  margin-right: 4px;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  color: #666;
}
.pagination a.active { background: #FF8C00; color: #fff; border-color: #FF8C00; }
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #FF8C00, #FFB347);
}
.login-card {
  width: 360px;
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}
.login-card h1 { text-align: center; font-size: 22px; }
.login-card .sub { text-align: center; color: #999; margin: 8px 0 24px; font-size: 14px; }
.login-card label { display: block; margin-bottom: 16px; font-size: 13px; color: #666; }
.login-card input {
  width: 100%; margin-top: 6px; padding: 10px 12px;
  border: 1px solid #ddd; border-radius: 8px;
}
.login-card .btn-primary { width: 100%; margin-top: 8px; padding: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; }
  .grid-2 { grid-template-columns: 1fr; }
}