/* Apple-inspired Clean Lab & Instrument Styling */
.circuit-section {
  margin-bottom: 2rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 880px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

.input-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.5rem;
}

.result-panel {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.input-with-unit {
  display: flex;
  align-items: center;
}

.input-with-unit input, .input-with-unit select {
  flex: 1;
  padding: 9px 12px;
  border-radius: 8px 0 0 8px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: border-color 0.15s ease;
}

body.light-theme .input-with-unit input, body.light-theme .input-with-unit select {
  background: #ffffff;
}

.input-with-unit .unit-tag {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-left: none;
  padding: 9px 12px;
  border-radius: 0 8px 8px 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--apple-blue);
  min-width: 48px;
  text-align: center;
}

.input-with-unit input:focus, .input-with-unit select:focus {
  outline: none;
  border-color: var(--apple-blue);
}

.res-highlight-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--apple-blue);
  padding: 14px;
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.canvas-container {
  background: #0d0d0e;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 10px;
  margin-top: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
}

body.light-theme .canvas-container {
  background: #fbfbfd;
  border-color: rgba(0,0,0,0.08);
}

canvas {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

/* 邏輯閘互動樣式 */
.gate-ctrl-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.gate-btn {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 0.88rem;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.gate-btn.active {
  background: var(--apple-green);
  color: #000000;
  font-weight: 600;
  border-color: var(--apple-green);
}

.lamp-indicator {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #3a3a3c;
  display: inline-block;
  vertical-align: middle;
  transition: all 0.2s ease;
}

.sim-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  font-size: 0.88rem;
  text-align: center;
}

.sim-table th {
  background: var(--bg-surface-elevated);
  color: var(--text-secondary);
  font-weight: 500;
  padding: 10px 12px;
  border: 1px solid var(--border-subtle);
}

.sim-table td {
  padding: 10px 12px;
  border: 1px solid var(--border-subtle);
}