* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: #f7f8fa;
  color: #1a1a1a;
  margin: 0;
}
header {
  background: #fff;
  border-bottom: 1px solid #ddd;
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header h1 { font-size: 18px; margin: 0; }
.who { font-size: 13px; color: #555; }
.who button { margin-left: 12px; }

nav.tabs {
  background: #fff;
  border-bottom: 1px solid #ddd;
  padding: 0 24px;
  display: flex;
  gap: 4px;
}
.tab {
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 12px 16px;
  cursor: pointer;
  font-size: 14px;
  color: #555;
}
.tab.active { border-bottom-color: #1f6feb; color: #1a1a1a; }

main { padding: 24px; max-width: 1200px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }

.row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.row input, .row select, .row button {
  padding: 8px 12px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #fff;
}
.row input { flex: 1; min-width: 200px; }
.row button {
  background: #1f6feb;
  border-color: #1f6feb;
  color: #fff;
  cursor: pointer;
}
.row button:hover { background: #1a5ed4; }

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid #eee;
  font-size: 13px;
}
th { background: #f0f2f5; font-weight: 600; }
td .danger {
  background: #d33;
  border-color: #d33;
  color: #fff;
  border: 0;
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
}
td select { padding: 4px 8px; }

#status {
  position: fixed;
  bottom: 16px;
  right: 16px;
  padding: 10px 16px;
  background: #1a1a1a;
  color: #fff;
  border-radius: 4px;
  font-size: 13px;
  display: none;
  max-width: 400px;
}
#status.show { display: block; }
#status.error { background: #d33; }