:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --border: #d8dce3;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --text: #1f2330;
  --muted: #6b7280;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
header {
  background: var(--card);
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
header h1 { font-size: 20px; margin: 0; }
#actorBar { display: flex; align-items: center; gap: 8px; font-size: 14px; }
#actorBar input { padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; }

main { max-width: 900px; margin: 24px auto; padding: 0 16px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.hidden { display: none !important; }

table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 8px; overflow: hidden; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { background: #eef1f5; font-weight: 600; }
tr:hover { background: #f9fafb; cursor: pointer; }

button {
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  background: #e5e7eb;
}
button.primary { background: var(--primary); color: white; }
button.primary:hover { background: var(--primary-dark); }
button.danger { background: var(--danger); color: white; }

#changeForm {
  background: var(--card);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.formActions { display: flex; gap: 10px; margin-top: 10px; }

#historyPanel {
  margin-top: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
}
#historyList { list-style: none; padding: 0; margin: 0; font-size: 13px; }
#historyList li { padding: 8px 0; border-bottom: 1px dashed var(--border); }
#historyList li:last-child { border-bottom: none; }
.histMeta { color: var(--muted); }