/* ════════════════════════════════════════════════════════════════
 * 7. 과도 응답 그래프 패널
 * ════════════════════════════════════════════════════════════════ */
#transient-panel {
  position: absolute; top: 12px; right: 12px; z-index: 25;
  background: var(--bg-panel-deep); border: 1px solid var(--border-base);
  border-radius: 12px; padding: 12px 14px; width: 380px;
  max-width: calc(100vw - 24px); box-sizing: border-box;
  backdrop-filter: var(--blur); box-shadow: var(--shadow-float);
  display: none;
}
#transient-panel.visible { display: block; }
#transient-panel .tp-title {
  font-size: 12px; color: var(--text-accent); font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase;
  border-bottom: 1px solid var(--border-dim); padding-bottom: 7px; margin-bottom: 10px;
  display: flex; align-items: center; justify-content: space-between;
}
#transient-panel .tp-close { cursor: pointer; color: var(--text-dim); font-size: 16px; line-height: 1; }
#transient-panel .tp-close:hover { color: var(--text-accent); }
/* 그래프 캔버스 = 흰 지면 (수능 그래프 문항과 같은 바탕) */
#transient-canvas { width: 100%; display: block; border-radius: var(--radius-sm); background: #ffffff; border: 1px solid var(--border-dim); }
#transient-toggles { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tp-toggle {
  font-size: 11px; font-family: var(--font); padding: 3px 10px;
  border-radius: var(--radius-sm); border: 1px solid; cursor: pointer;
  transition: opacity 0.15s, background 0.15s; opacity: 0.45; font-weight: 600;
}
.tp-toggle.active { opacity: 1; }
.tp-toggle:hover  { opacity: 0.8; }
#transient-legend { margin-top: 7px; font-size: 11px; font-family: var(--font); color: var(--text-dim); display: flex; gap: 10px; flex-wrap: wrap; line-height: 1.6; }
/* KaTeX 수식 레이블 (그래프 오버레이) */
.tg-formula-label .katex { font-size: 10px !important; }
.tg-formula-label .katex-html { color: inherit; }

/* ── 오실로스코프 패널 (파형: 교류·정류·비선형) — 과도 그래프와 같은 자리 ── */
#scope-panel {
  position: absolute; top: 12px; right: 12px; z-index: 25;
  background: var(--bg-panel-deep); border: 1px solid var(--border-base);
  border-radius: 12px; padding: 12px 14px; width: 380px;
  max-width: calc(100vw - 24px); box-sizing: border-box;
  backdrop-filter: var(--blur); box-shadow: var(--shadow-float);
  display: none;
}
#scope-panel.visible { display: block; }
#scope-panel .tp-title { font-size: 12px; color: var(--text-accent); font-weight: 700; letter-spacing: 1px;
  border-bottom: 1px solid var(--border-dim); padding-bottom: 7px; margin-bottom: 10px; display: flex; justify-content: space-between; }
#scope-canvas { width: 100%; display: block; border-radius: var(--radius-sm); background: #ffffff; border: 1px solid var(--border-dim); }
#scope-toggles { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 7px; align-items: center; }
#scope-toggles .tp-toggle { padding: 2px 8px; font-size: 10.5px; }
#scope-toggles .sc-kind { margin-left: auto; }
#scope-legend { font-size: 10px; color: var(--text-dim); margin-top: 6px; display: flex; gap: 12px; flex-wrap: wrap; }
#scope-legend b { font-weight: 600; }
#scope-legend .sc-note { flex-basis: 100%; color: var(--text-dim); opacity: 0.9; }