:root {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #cbd5e1;
  --text: #0f172a;
  --text-muted: #475569;
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --danger: #b91c1c;
  --warn-bg: #fffbeb;
  --warn-border: #fef3c7;
  --warn-text: #92400e;
}
body {
  margin: 0;
  padding: 1.5rem;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}
.container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
}
.notice {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
h1 {
  margin: 0 0 0.5rem 0;
  font-size: 1.5rem;
}
h2 {
  margin: 0 0 0.75rem 0;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}
.form-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
label {
  font-weight: 600;
  font-size: 0.9rem;
}
select, button {
  font: inherit;
  padding: 0.45rem 0.85rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}
button {
  background: var(--primary);
  color: #ffffff;
  cursor: pointer;
  font-weight: 500;
  border: none;
}
button:hover:not(:disabled) {
  background: var(--primary-hover);
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
button.danger {
  background: var(--danger);
}
.button-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.data-grid {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0.35rem 0.75rem;
  font-size: 0.875rem;
}
.data-label {
  color: var(--text-muted);
  font-weight: 600;
}
.data-val {
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, monospace;
}
.status-box {
  font-weight: 600;
  font-size: 0.95rem;
  min-height: 1.4rem;
}
.history-list {
  max-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--border);
  padding: 0.5rem;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.8rem;
  background: #f1f5f9;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.history-item {
  white-space: pre-wrap;
  word-break: break-all;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 0.25rem;
}
.events-heading {
  font-size: 0.95rem;
  margin: 0.75rem 0 0.35rem 0;
}
.history-empty {
  color: #64748b;
}