.spoke-calculator-container {
  background: var(--bg-surface);
  border-radius: 2rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .calculator-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.params-panel {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.02);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.section h3 {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
}

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

.input-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
}

input,
select {
  background: var(--bg-page);
  padding: 0.6rem;
  border-radius: 0.5rem;
  color: var(--text-main);
  font-weight: 800;
}

.hint {
  font-size: 0.6rem;
  color: var(--text-muted);
  font-style: italic;
}

.results-panel {
  padding: 2rem;
  background: linear-gradient(145deg, var(--bg-page), var(--bg-surface));
  display: flex;
  flex-direction: column;
  align-items: center;
  border-left: 1px solid var(--border-color);
}

@media (max-width: 1023px) {
  .results-panel {
    border-left: none;
    border-top: 1px solid var(--border-color);
  }
}

.output-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 3rem;
}

.output-box {
  background: var(--bg-surface);
  padding: 1.5rem;
  border-radius: 1.5rem;
  border: 1px solid var(--border-color);
  flex: 1;
  box-shadow: 
    0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
}

.output-box.right {
  text-align: right;
}

.output-box .value {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
}

.unit {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.viz-wrapper {
  width: 100%;
  max-width: 400px;
}

.wheel-viz {
  width: 100%;
  height: auto;
}

.rim-guideline,
.hub-guideline {
  stroke-dasharray: 4 4;
  stroke: var(--border-color);
  fill: none;
  opacity: 0.3;
}

.disclaimer {
  margin-top: 2rem;
  font-size: 0.65rem;
  color: var(--text-muted);
  max-width: 300px;
  text-align: center;
}