.circuit-shell { width: min(1220px, calc(100% - 40px)); }
.circuit-hero { grid-template-columns: 1.1fr .9fr; }
.circuit-workspace { grid-template-columns: 282px minmax(0, 1fr); }
.circuit-stage { padding-bottom: 24px; }
.mode-control { display: grid; grid-template-columns: 1fr 1fr; margin: 0 0 28px; border: 1px solid var(--line); }
.mode-option { min-width: 0; border: 0; }
.mode-option + .mode-option { border-left: 1px solid var(--line); }
.mode-option.active { color: #08211f; background: var(--cyan); }
.circuit-status { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0 0 14px; padding: 11px 13px; border: 1px solid var(--line); color: #c9d8d5; font-size: 12px; }
.circuit-status strong { color: var(--orange); font: 500 12px "DM Mono", monospace; }
.circuit-board { overflow: hidden; border: 1px solid var(--line-soft); background: var(--panel-deep); }
.circuit-scene { display: block; width: 100%; height: auto; min-height: 390px; }
.wire { fill: none; stroke: var(--cyan); stroke-width: 3; stroke-linecap: square; stroke-linejoin: round; }
.battery-long, .battery-short { stroke: var(--yellow); stroke-width: 4; }
.resistor { fill: #173238; stroke: var(--orange); stroke-width: 2.5; }
.component-label, .current-label, .battery-label { fill: #c9d8d5; font: 500 13px "DM Mono", monospace; paint-order: stroke; stroke: var(--panel-deep); stroke-width: 5px; }
.battery-label { fill: var(--yellow); font-size: 17px; }
.current-label { fill: var(--cyan); font-size: 11px; }
.current-arrow { stroke: var(--cyan); stroke-width: 2; }
.junctions { fill: var(--cyan); }
.current-dot { fill: #d8fff6; stroke: var(--cyan); stroke-width: 2; filter: drop-shadow(0 0 5px rgba(101,230,209,.8)); }
.circuit-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.circuit-metrics .metric-value { font-size: 19px; }
.result-table-wrap { margin-top: 20px; overflow-x: auto; border: 1px solid var(--line-soft); }
.result-table { width: 100%; min-width: 580px; border-collapse: collapse; font: 12px "DM Mono", monospace; }
.result-table th, .result-table td { padding: 12px 14px; border-bottom: 1px solid var(--line-soft); text-align: right; white-space: nowrap; }
.result-table th:first-child, .result-table td:first-child { text-align: left; }
.result-table th { color: var(--muted); font-weight: 400; }
.result-table td { color: #dcebe8; }
.result-table tr:last-child td { border-bottom: 0; }
.result-table td:nth-child(3) { color: var(--cyan); }
.result-table td:nth-child(4) { color: var(--orange); }

@media (max-width: 900px) { .circuit-workspace { grid-template-columns: 260px minmax(0, 1fr); } }
@media (max-width: 820px) {
  .circuit-shell { width: min(calc(100% - 24px), 650px); }
  .circuit-hero { grid-template-columns: 1fr; }
  .circuit-workspace { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .circuit-status { display: block; }
  .circuit-status span { display: block; margin-top: 5px; }
  .circuit-scene { min-height: 260px; }
  .circuit-scene .component-label, .circuit-scene .current-label { font-size: 16px; }
  .result-table-wrap { margin-inline: 0; }
  .result-table { min-width: 0; table-layout: fixed; font-size: 9px; }
  .result-table th, .result-table td { padding: 10px 3px; }
}