.saddle-tool {
  --n-paper: #f7f3eb;
  --n-ink: #252421;
  --n-muted: #6f6a60;
  --n-line: #d8d0c1;
  --n-card: #fffdf8;
  --n-signal: #bd4b36;
  --n-signal-soft: #f1d5c8;
  --n-blue: #325b68;
  --n-on-signal: #fff;
  --n-on-ink: #fff;
  --n-scene: #e9e2d4;
  --n-ground: #b9ad99;
  --n-footer: #252421;
  --n-footer-text: #fff;

  color: var(--n-ink);
  background: var(--n-paper);
  border: 1px solid var(--n-line);
  border-radius: 18px;
  overflow: hidden;
  min-width: 0;
}

.tool-page,
.section-tool {
  min-width: 0;
}

.page-wrapper.with-sidebar > main {
  min-width: 0;
}

.saddle-layout {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(260px, .85fr) minmax(380px, 1.3fr);
}

.saddle-controls {
  min-width: 0;
  padding: 1.5rem 1.8rem;
  border-right: 1px solid var(--n-line);
}

.control-block {
  padding: 0 0 1.25rem;
  margin: 0 0 1.25rem;
  border-bottom: 1px solid var(--n-line);
}

.control-label {
  display: block;
  margin-bottom: .55rem;
  color: var(--n-ink);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.control-hint {
  margin: -.2rem 0 .75rem;
  color: var(--n-muted);
  font-size: .82rem;
  line-height: 1.4;
}

.unit-toggle,
.choice-grid,
.crank-row {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.unit-toggle button,
.choice,
.crank-choice {
  border: 1px solid var(--n-line);
  border-radius: 999px;
  background: var(--n-card);
  color: var(--n-ink);
  cursor: pointer;
  font: inherit;
  transition: background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
}

.unit-toggle button {
  padding: .5rem .85rem;
}

.choice {
  flex: 1 1 40%;
  padding: .65rem .6rem;
}

.crank-choice {
  min-width: 3.6rem;
  padding: .55rem .7rem;
}

.unit-toggle button:hover,
.choice:hover,
.crank-choice:hover {
  transform: translateY(-1px);
  border-color: var(--n-signal);
}

.unit-toggle button.is-active,
.choice.is-active,
.crank-choice.is-active {
  border-color: var(--n-signal);
  background: var(--n-signal);
  color: var(--n-on-signal);
}

.number-line {
  display: flex;
  align-items: center;
  gap: .55rem;
}

.number-line input {
  width: 7.5rem;
  padding: .72rem .78rem;
  border: 1px solid var(--n-line);
  border-radius: 10px;
  background: var(--n-card);
  color: var(--n-ink);
  font: inherit;
  font-size: 1.2rem;
}

.number-line span,
.micro-label {
  color: var(--n-muted);
  font-size: .85rem;
}

.range-input {
  display: block;
  width: 100%;
  margin-top: 1rem;
  accent-color: var(--n-signal);
}

.saddle-result {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(250px, 1fr) minmax(230px, .82fr);
  grid-template-rows: minmax(0, 1fr);
  align-items: stretch;
  background: var(--n-card);
}

.scene-wrap {
  display: flex;
  align-items: center;
  align-self: stretch;
  box-sizing: border-box;
  height: auto;
  min-width: 0;
  min-height: 0;
  padding: 1.1rem;
  background: var(--n-scene);
}

.saddle-scene {
  display: block;
  max-width: 100%;
  min-width: 0;
  width: 100%;
  height: auto;
}

.scene-ground,
.scene-frame,
.scene-crank,
.scene-post,
.scene-plumb {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.scene-ground {
  stroke: var(--n-ground);
  stroke-width: 3;
}

.scene-wheel {
  fill: none;
  stroke: var(--n-blue);
  stroke-width: 4;
}

.scene-hub {
  fill: var(--n-signal);
}

.scene-front-hub {
  fill: var(--n-blue);
}

.scene-frame {
  stroke: var(--n-blue);
  stroke-width: 7;
}

.scene-crank {
  stroke: var(--n-ink);
  stroke-width: 4;
}

.scene-saddle {
  fill: var(--n-signal);
}

.scene-post {
  stroke: var(--n-ink);
  stroke-width: 5;
}

.scene-crank-ring {
  fill: none;
  stroke: var(--n-ink);
  stroke-width: 2;
}

.scene-handlebar {
  fill: none;
  stroke: var(--n-ink);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.scene-plumb {
  stroke: var(--n-signal);
  stroke-width: 2;
  stroke-dasharray: 5 6;
}

.scene-mark {
  fill: var(--n-signal);
  stroke: var(--n-card);
  stroke-width: 3;
}

.scene-label {
  fill: var(--n-ink);
  font-size: 15px;
  font-weight: 800;
}

.result-copy {
  min-width: 0;
  padding: 1.5rem;
}

.result-eyebrow {
  margin: 0;
  color: var(--n-signal);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.target-value {
  margin-top: .3rem;
  color: var(--n-ink);
  font-size: clamp(2.3rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -.06em;
  line-height: 1;
}

.target-caption {
  margin: .4rem 0 1.5rem;
  color: var(--n-muted);
}

.range-line {
  padding: .8rem 0;
  border-top: 1px solid var(--n-line);
  border-bottom: 1px solid var(--n-line);
  color: var(--n-muted);
  font-size: .84rem;
}

.range-line strong {
  display: block;
  margin-top: .25rem;
  color: var(--n-ink);
  font-size: 1rem;
}

.measurement-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem .7rem;
  margin-top: 1.1rem;
}

.measurement-grid div {
  min-width: 0;
}

.measurement-grid span {
  display: block;
  color: var(--n-muted);
  font-size: .72rem;
}

.measurement-grid strong {
  display: block;
  margin-top: .2rem;
  overflow-wrap: anywhere;
  color: var(--n-ink);
  font-size: .98rem;
}

.saddle-checks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--n-line);
}

.saddle-checks article {
  min-width: 0;
  padding: 1.2rem 1.4rem;
  border-right: 1px solid var(--n-line);
}

.saddle-checks article:last-child {
  border-right: 0;
}

.saddle-checks h2 {
  margin: 0;
  color: var(--n-ink);
  font-size: .9rem;
}

.saddle-checks p {
  margin: .55rem 0 0;
  color: var(--n-muted);
  font-size: .86rem;
  line-height: 1.55;
}

.saddle-checks .notice {
  background: var(--n-signal-soft);
}

.estimate-notice {
  margin: 0;
  padding: .9rem 1.4rem;
  background: var(--n-footer);
  color: var(--n-footer-text);
  font-size: .82rem;
  line-height: 1.45;
}

.theme-dark .saddle-tool {
  --n-paper: #1e1d1b;
  --n-ink: #f5f0e7;
  --n-muted: #beb5a7;
  --n-line: #4b463e;
  --n-card: #282623;
  --n-signal: #ef896d;
  --n-signal-soft: #4b2e29;
  --n-blue: #8eb4bd;
  --n-on-signal: #1e1d1b;
  --n-on-ink: #fff;
  --n-scene: #37322c;
  --n-ground: #827665;
  --n-footer: #171614;
  --n-footer-text: #f5f0e7;
}

@media (max-width: 820px) {
  .saddle-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .saddle-controls {
    border-right: 0;
    border-bottom: 1px solid var(--n-line);
  }

  .saddle-result {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto;
  }

  .scene-wrap {
    height: auto;
    min-height: 0;
  }

  .saddle-checks {
    grid-template-columns: minmax(0, 1fr);
  }

  .saddle-checks article {
    border-right: 0;
    border-bottom: 1px solid var(--n-line);
  }

  .saddle-checks article:last-child {
    border-bottom: 0;
  }
}