:root {
  --bg: #f5f5f5;
  --panel: #ffffff;
  --line: #dddddd;
  --text: #181818;
  --muted: #6f6f6f;
  --stem-a: #111111;
  --stem-b: #2563eb;
  --delta: #b91c1c;
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

.stem-configurator {
  margin: 0 auto;
  padding: 24px;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.stem-configurator.app {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 24px;
  min-height: 100vh;
}

.stem-configurator .sidebar,
.stem-configurator .stage {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 26px;
}

.stem-configurator .sidebar {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stem-configurator .stage {
  position: relative;
  padding: 20px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 16px;
  min-height: 760px;
}

.stem-configurator h1 {
  margin: 0;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.1;
}

.stem-configurator .sub {
  margin-top: 4px;
  font-size: clamp(12px, 1.2vw, 14px);
  color: var(--muted);
}

.stem-configurator .group {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: grid;
  gap: 14px;
}

.stem-configurator .group-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.stem-configurator .group-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 700;
}

.stem-configurator .dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  display: inline-block;
}

.stem-configurator .dot-a {
  background: var(--stem-a);
}

.stem-configurator .dot-b {
  background: var(--stem-b);
}

.stem-configurator .field {
  display: grid;
  gap: 8px;
}

.stem-configurator .labelrow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: clamp(12px, 1.2vw, 14px);
  font-weight: 600;
}

.stem-configurator .valuebox {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  min-width: 90px;
  text-align: right;
}

.stem-configurator input[type="range"] {
  width: 100%;
  appearance: none;
  height: 8px;
  background: #e9e9e9;
  border-radius: 999px;
  outline: none;
}

.stem-configurator input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #111111;
  border: 0;
  cursor: pointer;
}

.stem-configurator input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #111111;
  border: 0;
  cursor: pointer;
}

.stem-configurator .row2 {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 10px;
  align-items: center;
}

.stem-configurator input[type="number"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fafafa;
  font-size: clamp(13px, 1.3vw, 15px);
  color: var(--text);
  appearance: textfield;
}

.stem-configurator input[type="number"]::-webkit-outer-spin-button,
.stem-configurator input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.stem-configurator .topbar {
  display: none;
}

.stem-configurator .legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: clamp(12px, 1.2vw, 13px);
  color: var(--muted);
}

.stem-configurator .legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.stem-configurator .legend-a {
  color: var(--stem-a);
}

.stem-configurator .legend-b {
  color: var(--stem-b);
}

.stem-configurator .legend-diff {
  color: var(--delta);
}

.stem-configurator .legend-line {
  width: 28px;
  height: 0;
  border-top: 3px solid currentColor;
}

.stem-configurator .legend-line-dashed {
  border-top-style: dashed;
}

.stem-configurator .toolbar {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 10;
  display: flex;
  gap: 10px;
}

.stem-configurator .toolbar {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 10;
  display: flex;
  gap: 10px;
}

.stem-configurator .stem-toggle-center {
  padding: 12px 18px;
  font-size: 14px;
  background: #ffffff;
  color: #111111;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 600;
}

.stem-configurator .stem-toggle-center.active {
  background: #111111;
  color: #ffffff;
  border-color: #111111;
}

.stem-configurator .stem-toggle-center:hover {
  background: #f3f3f3;
}

.stem-configurator .stem-toggle-center.active:hover {
  background: #000000;
}

.stem-configurator button {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: clamp(12px, 1.2vw, 14px);
  font-weight: 600;
}

.stem-configurator button.active {
  background: #111111;
  border-color: #111111;
  color: #ffffff;
}

.stem-configurator .stem-reset {
  padding: 12px 18px;
  font-size: 14px;
  background: #111111;
  color: #ffffff;
  border: 1px solid #111111;
  border-radius: 999px;
  font-weight: 600;
}

.stem-configurator .stem-reset:hover {
  background: #000000;
}

.stem-configurator .stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.stem-configurator .card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px 18px;
  background: #ffffff;
  min-height: 0;
}

.stem-configurator .card h3 {
  margin: 0;
  min-height: 32px;
  display: flex;
  align-items: center;
  font-size: 12px;
  line-height: 1.2;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stem-configurator .card-title-with-dot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.stem-configurator .card .metric:first-of-type {
  margin-top: 14px;
}

.stem-configurator .card-title-with-dot .dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  flex: 0 0 10px;
}

.stem-configurator .metric {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
  margin-top: 10px;
  font-variant-numeric: tabular-nums;
}

.stem-configurator .metric div {
  font-size: clamp(14px, 1vw, 18px);
  line-height: 1.05;
  min-width: 0;
}

.stem-configurator .metric strong {
  font-size: clamp(18px, 1.8vw, 28px);
  line-height: 1;
  min-width: 0;
}

.stem-configurator .metric span {
  color: var(--muted);
  font-size: clamp(11px, 0.9vw, 14px);
  line-height: 1;
  min-width: 0;
}

.stem-configurator .metric > :nth-child(2),
.stem-configurator .metric > :nth-child(3) {
  display: inline-block;
  vertical-align: baseline;
}

.stem-configurator .metric > :nth-child(2) {
  margin-right: 8px;
}

.stem-configurator .svg-panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(180deg, #ffffff 0%, #fbfbfb 100%);
  min-height: 560px;
  position: relative;
}

.stem-configurator .stem-svg {
  width: 100%;
  min-height: 560px;
  padding-top: 70px;
  padding-right: 24px;
  padding-bottom: 24px;
  padding-left: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stem-configurator .stem-svg svg {
  width: 100%;
  height: auto;
  display: block;
}

.stem-configurator .note {
  font-size: clamp(11px, 1vw, 12px);
  line-height: 1.45;
  color: var(--muted);
}

.stem-configurator .stem-error {
  position: absolute;
  left: 20px;
  bottom: 20px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(185, 28, 28, 0.08);
  color: #7f1d1d;
  font-size: clamp(12px, 1.2vw, 13px);
}

@media (max-width: 1400px) {
  .stem-configurator .metric strong {
    font-size: clamp(18px, 1.7vw, 26px);
  }

  .stem-configurator .metric div {
    font-size: clamp(14px, 1vw, 18px);
  }

  .stem-configurator .metric span {
    font-size: clamp(11px, 0.9vw, 14px);
  }
}

@media (max-width: 1120px) {
  .stem-configurator.app {
    grid-template-columns: 1fr;
  }

  .stem-configurator .stage {
    min-height: auto;
  }

  .stem-configurator .metric {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .stem-configurator .metric strong {
    font-size: clamp(18px, 4vw, 26px);
  }

  .stem-configurator .metric div {
    font-size: clamp(14px, 2.5vw, 18px);
  }

  .stem-configurator .metric span {
    font-size: clamp(11px, 1.8vw, 14px);
  }
}

@media (max-width: 640px) {
  .stem-configurator {
    padding: 14px;
  }

  .stem-configurator .sidebar,
  .stem-configurator .stage {
    border-radius: 18px;
  }

  .stem-configurator .card {
    padding: 12px 14px;
  }

  .stem-configurator .topbar {
    padding-right: 90px;
  }

  .stem-configurator .toolbar {
    position: absolute;
    top: 24px;
    right: 24px;
    z-index: 10;
  }

  .stem-configurator .metric {
    gap: 8px;
    margin-top: 10px;
  }

  .stem-configurator .metric strong {
    font-size: clamp(18px, 6vw, 24px);
  }

  .stem-configurator .metric div {
    font-size: clamp(14px, 4.2vw, 17px);
  }

  .stem-configurator .metric span {
    font-size: clamp(11px, 3vw, 13px);
  }
}

.stem-configurator .stem-svg svg g#stemA,
.stem-configurator .stem-svg svg g#stemA * {
  stroke: var(--stem-a) !important;
}

.stem-configurator .stem-svg svg [id^="A_"] {
  stroke: var(--stem-a) !important;
}

/* nur gestrichelte Linien B */
.stem-configurator .stem-svg svg [id^="B_centerLine"],
.stem-configurator .stem-svg svg [id^="B_lineTop"],
.stem-configurator .stem-svg svg [id^="B_lineBottom"] {
  stroke: var(--stem-b) !important;
}

/* nur Frontkreis B */
.stem-configurator .stem-svg svg #B_frontCircle,
.stem-configurator .stem-svg svg #B_frontCircleOffset {
  stroke: var(--stem-b) !important;
}