.spoke-calculator-container {
  width: 100%;
  background: var(--bg-surface);
  border-radius: 2rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.spoke-calculator-container,
.spoke-calculator-container *,
.spoke-calculator-container *::before,
.spoke-calculator-container *::after {
  box-sizing: border-box;
}

.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;
  min-width: 0;
}

.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;
  min-width: 0;
}

label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  line-height: 1.35;
}

input,
select {
  width: 100%;
  min-width: 0;
  background: var(--bg-page);
  border: 1px solid color-mix(in srgb, var(--border-color), white 12%);
  padding: 0.85rem 1rem;
  border-radius: 0.85rem;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.2;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

input:hover,
select:hover {
  border-color: color-mix(in srgb, var(--accent), var(--border-color) 60%);
}

input:focus,
select:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent), white 10%);
  box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--accent), transparent 82%);
}

input[type='number'] {
  appearance: textfield;
}

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

.select-wrapper {
  position: relative;
}

.select-wrapper select {
  appearance: none;
  padding-right: 3rem;
  cursor: pointer;
}

.select-icon {
  position: absolute;
  top: 50%;
  right: 1rem;
  translate: 0 -50%;
  pointer-events: none;
  color: var(--text-muted);
}

.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);
  min-width: 0;
}

@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;
  min-width: 0;
}

.output-box {
  background: var(--bg-surface);
  padding: 1.5rem;
  border-radius: 1.5rem;
  border: 1px solid var(--border-color);
  flex: 1;
  min-width: 0;
  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);
  overflow-wrap: anywhere;
}

.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;
}

@media (max-width: 767px) {
  .params-panel,
  .results-panel {
    padding: 1.25rem;
  }

  .inputs-grid,
  .output-header {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .output-header {
    margin-bottom: 2rem;
  }

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

  .output-box .value {
    font-size: clamp(2.2rem, 11vw, 3rem);
  }
}