.calc-card {
  --calc-primary: #004ac6;
  --calc-primary-container: #2563eb;
  --calc-primary-dim: rgba(0, 74, 198, 0.08);
  --calc-surface-low: #f2f4f6;
  --calc-surface-lowest: #ffffff;
  --calc-surface-highest: #e0e3e5;
  --calc-on-surface: #191c1e;
  --calc-on-surface-variant: #434655;
  --calc-outline: #737686;
  --calc-border: rgba(195, 198, 215, 0.2);
  --calc-success: #16a34a;
  --calc-success-dim: rgba(22, 163, 74, 0.1);
  --calc-warning: #ea580c;
  --calc-warning-dim: rgba(234, 88, 12, 0.1);
  --calc-radius-sm: 2px;
  --calc-radius-lg: 4px;
  --calc-radius-xl: 8px;
  --calc-radius-pill: 20px;
  --calc-transition: 200ms ease;

  background-color: var(--calc-surface-low);
  border-radius: var(--calc-radius-xl);
  padding: 24px;
  border: 1px solid var(--calc-border);
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--calc-on-surface);
  box-sizing: border-box;
  width: 100%;
  max-width: 860px;
  margin: auto;
}

.calc-card *,
.calc-card *::before,
.calc-card *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.calc-presets {
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--calc-border);
}

.calc-presets__label {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--calc-outline);
  white-space: nowrap;
}

.calc-presets__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.calc-presets__btn {
  all: unset;
  cursor: pointer;
  padding: 6px 14px;
  border-radius: var(--calc-radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--calc-on-surface-variant);
  background: var(--calc-surface-highest);
  transition: all var(--calc-transition);
  font-family: inherit;
}

.calc-presets__btn:hover {
  color: var(--calc-primary);
  background: var(--calc-primary-dim);
}

.calc-section-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--calc-on-surface-variant);
  margin-top: 18px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--calc-primary);
}

.calc-inputs .calc-section-label:first-child {
  margin-top: 0;
}

.calc-grid {
  display: flex;
  flex-wrap: wrap;
}

.calc-grid > * {
  flex: 1 1 340px;
  margin: 0 12px 24px;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  min-width: 280px;
}

.calc-field {
  display: flex;
  flex-direction: column;
}

.calc-field:not(:last-child) {
  margin-bottom: 14px;
}

.calc-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--calc-outline);
  display: block;
  margin-bottom: 5px;
}

.calc-input {
  width: 100%;
  height: 34px;
  background-color: var(--calc-surface-highest);
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-sm);
  padding: 0 12px;
  font-size: 14px;
  color: var(--calc-on-surface);
  transition: box-shadow var(--calc-transition), border-color var(--calc-transition);
  font-family: inherit;
}

.calc-input:focus {
  outline: none;
  border-color: var(--calc-primary);
  box-shadow: 0 0 0 2px rgba(0, 74, 198, 0.15);
}

.calc-select {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%23737686'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.calc-split-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.calc-range-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.calc-range {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--calc-surface-highest);
  outline: none;
  cursor: pointer;
}

.calc-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--calc-primary);
  cursor: pointer;
  transition: transform 150ms ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.calc-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.calc-input--range-val {
  width: 80px;
  text-align: right;
  flex-shrink: 0;
}

.calc-results {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.calc-hero-result {
  background-color: var(--calc-surface-lowest);
  border-radius: var(--calc-radius-xl);
  padding: 20px 20px 16px;
  text-align: center;
  border: 1px solid var(--calc-border);
  transition: all var(--calc-transition);
}

.calc-hero-result--valid {
  border-left: 4px solid var(--calc-success);
}

.calc-hero-result--invalid {
  border-left: 4px solid var(--calc-warning);
}

.calc-hero-result__status {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--calc-radius-pill);
  margin-bottom: 8px;
  background: var(--calc-success-dim);
  color: var(--calc-success);
}

.calc-hero-result__status--warn {
  background: var(--calc-warning-dim);
  color: var(--calc-warning);
}

.calc-hero-result__label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--calc-outline);
  margin-bottom: 2px;
}

.calc-hero-result__value {
  font-size: 44px;
  font-weight: 700;
  color: var(--calc-primary);
  line-height: 1.1;
  font-family: 'Manrope', system-ui, sans-serif;
}

.calc-hero-result__unit {
  font-size: 13px;
  font-weight: 600;
  color: var(--calc-on-surface-variant);
  margin-top: 4px;
}

/* SVG Cutaway */
.calc-cutaway-container {
  background: var(--calc-surface-lowest);
  border-radius: var(--calc-radius-xl);
  padding: 16px;
  border: 1px solid var(--calc-border);
}

.calc-cutaway__title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--calc-on-surface-variant);
  margin-bottom: 12px;
}

.calc-cutaway__dew-info {
  font-size: 12px;
  font-weight: 700;
  color: var(--calc-success);
  text-transform: none;
}

.calc-cutaway__dew-info--warn {
  color: var(--calc-warning);
}

.calc-cutaway-svg-wrap {
  width: 100%;
  overflow: hidden;
}

.calc-cutaway-svg {
  width: 100%;
  height: auto;
  display: block;
}

.calc-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background-color: var(--calc-surface-lowest);
  border-radius: var(--calc-radius-lg);
  padding: 16px;
  border: 1px solid var(--calc-border);
}

.calc-detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.calc-detail-item__label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--calc-outline);
}

.calc-detail-item__value {
  font-size: 16px;
  font-weight: 700;
  color: var(--calc-on-surface);
}

.calc-detail-item__value--highlight {
  color: var(--calc-primary);
}

.calc-detail-item__value--savings {
  color: var(--calc-success);
}

.calc-spec-block {
  background: var(--calc-surface-highest);
  border-radius: var(--calc-radius-lg);
  padding: 12px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.calc-spec-block__label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--calc-outline);
}

.calc-spec-block__value {
  font-size: 15px;
  font-weight: 700;
  color: var(--calc-on-surface);
}

.calc-save-btn {
  all: unset;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 0;
  width: 100%;
  font-size: 13px;
  font-weight: 600;
  color: var(--calc-outline);
  transition: color var(--calc-transition);
  font-family: inherit;
}

.calc-save-btn:hover {
  color: var(--calc-primary);
}

.calc-save-btn__icon {
  font-size: 18px;
}

.calc-saved {
  border-top: 1px solid var(--calc-border);
  margin-top: 24px;
  padding-top: 20px;
}

.calc-saved__header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--calc-on-surface-variant);
  margin-bottom: 12px;
}

.calc-saved__header-icon {
  font-size: 16px;
}

[data-saved-empty] {
  font-size: 14px;
  color: var(--calc-outline);
  margin: 0;
}

[data-saved-list] {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-saved-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--calc-border);
  border-radius: var(--calc-radius-lg);
  cursor: pointer;
  transition: background var(--calc-transition);
  background: var(--calc-surface-lowest);
  font-size: 14px;
}

.calc-saved-row:hover {
  background: var(--calc-primary-dim);
}

.calc-saved-row__name {
  min-width: 80px;
  max-width: 140px;
  width: 100%;
  margin-right: 12px;
  cursor: pointer;
  border-bottom: 1.5px solid transparent;
  transition: border-color var(--calc-transition);
  font-weight: 600;
  color: var(--calc-on-surface);
  line-height: 1.4;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.calc-saved-row:hover .calc-saved-row__name {
  border-bottom-style: dashed;
  border-bottom-color: var(--calc-outline);
}

.calc-saved-row__dims {
  font-weight: 600;
  color: var(--calc-on-surface-variant);
  font-size: 13px;
  word-break: break-word;
}

.calc-saved-row__vol {
  min-width: 70px;
  font-weight: 700;
  color: var(--calc-primary);
  margin-left: auto;
  text-align: right;
  font-size: 13px;
}

.calc-saved-row__del {
  all: unset;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--calc-radius-sm);
  color: var(--calc-outline);
  transition: all var(--calc-transition);
  margin-left: 6px;
}

.calc-saved-row__del:hover {
  color: #b3261e;
  background: rgba(179, 38, 30, 0.08);
}

.calc-saved-row__del .material-symbols-outlined {
  font-size: 16px;
}

.calc-saved-row__rename-input {
  all: unset;
  font: inherit;
  color: var(--calc-on-surface);
  border-bottom: 1.5px solid var(--calc-primary);
  width: 100%;
  padding: 0 2px;
  font-weight: 600;
  font-size: inherit;
  line-height: 1.4;
  display: block;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow: hidden;
  resize: none;
}

@media (max-width: 720px) {
  .calc-card {
    padding: 16px;
  }

  .calc-grid > * {
    margin-left: 0;
    margin-right: 0;
  }

  .calc-split-row {
    grid-template-columns: 1fr;
  }

  .calc-detail-grid {
    grid-template-columns: 1fr;
  }

  .calc-hero-result__value {
    font-size: 36px;
  }
}