[data-kw-shell="v1"] .tool-shell {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
  gap: 20px;
  align-items: start;
  min-width: 0;
}

[data-kw-shell="v1"] .calculator-panel,
[data-kw-shell="v1"] .result-panel {
  min-width: 0;
  box-sizing: border-box;
  padding: 22px;
  border: 1px solid var(--kw-line, #d7e3dc);
  background: var(--kw-surface, #fff);
}

[data-kw-shell="v1"] .calculator-panel {
  display: grid;
  gap: 24px;
}

[data-kw-shell="v1"] .result-panel {
  background: var(--kw-page, #fbfdfb);
}

[data-kw-shell="v1"] .result-panel h2,
[data-kw-shell="v1"] .result-panel h3,
[data-kw-shell="v1"] .basis-card h2 {
  margin: 0;
  color: var(--kw-ink, #14352a);
  font-size: 18px;
  line-height: 1.4;
}

[data-kw-shell="v1"] .result-panel h3 {
  font-size: 16px;
}

[data-kw-shell="v1"] #calc-form {
  display: grid;
  gap: 20px;
}

[data-kw-shell="v1"] .mode-fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

[data-kw-shell="v1"] .mode-fieldset legend,
[data-kw-shell="v1"] .field-group > label {
  margin: 0 0 8px;
  color: var(--kw-ink, #14352a);
  font-size: 13px;
  font-weight: 700;
}

[data-kw-shell="v1"] .mode-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
}

[data-kw-shell="v1"] .mode-option {
  position: relative;
  min-width: 0;
  cursor: pointer;
}

[data-kw-shell="v1"] .mode-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

[data-kw-shell="v1"] .mode-option span {
  display: grid;
  min-height: 42px;
  box-sizing: border-box;
  place-items: center;
  padding: 8px 5px;
  border: 1px solid var(--kw-line-strong, #abc5b5);
  border-radius: 2px;
  background: #fff;
  color: var(--kw-ink, #14352a);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
}

[data-kw-shell="v1"] .mode-option input:checked + span {
  border-color: var(--kw-ink, #14352a);
  background: var(--kw-ink, #14352a);
  color: #fff;
}

[data-kw-shell="v1"] .mode-option input:focus-visible + span,
[data-kw-shell="v1"] input[type="text"]:focus-visible,
[data-kw-shell="v1"] button:focus-visible {
  outline: 3px solid #f0a92e;
  outline-offset: 2px;
}

[data-kw-shell="v1"] .field-group {
  display: grid;
  gap: 8px;
}

[data-kw-shell="v1"] .field-group > label {
  margin: 0;
}

[data-kw-shell="v1"] .unit-label {
  color: var(--kw-muted, #5b7368);
  font-weight: 500;
}

[data-kw-shell="v1"] .input-with-unit {
  position: relative;
}

[data-kw-shell="v1"] input[type="text"] {
  width: 100%;
  min-height: 46px;
  box-sizing: border-box;
  padding: 9px 12px;
  border: 1px solid var(--kw-line-strong, #abc5b5);
  border-radius: 2px;
  background: #fff;
  color: var(--kw-ink, #14352a);
  font: inherit;
  font-size: 16px;
}

[data-kw-shell="v1"] .input-with-unit input.has-unit {
  padding-right: 70px;
}

[data-kw-shell="v1"] .input-unit {
  position: absolute;
  top: 50%;
  right: 12px;
  color: var(--kw-muted, #5b7368);
  font-size: 12px;
  transform: translateY(-50%);
  pointer-events: none;
}

[data-kw-shell="v1"] input[aria-invalid="true"] {
  border-color: #ad3f32;
  background: #fff9f7;
}

[data-kw-shell="v1"] .help-text,
[data-kw-shell="v1"] .form-error,
[data-kw-shell="v1"] .basis-card p,
[data-kw-shell="v1"] .result-status,
[data-kw-shell="v1"] .rounding-note,
[data-kw-shell="v1"] .scale-note {
  margin: 0;
  color: var(--kw-muted, #5b7368);
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .form-error {
  color: #a33429;
  font-weight: 700;
}

[data-kw-shell="v1"] .button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

[data-kw-shell="v1"] .button {
  min-height: 42px;
  box-sizing: border-box;
  padding: 8px 13px;
  border: 1px solid var(--kw-line-strong, #abc5b5);
  border-radius: 2px;
  background: #fff;
  color: var(--kw-ink, #14352a);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
}

[data-kw-shell="v1"] .button:hover {
  border-color: var(--kw-accent, #258357);
}

[data-kw-shell="v1"] .button-primary {
  border-color: var(--kw-ink, #14352a);
  background: var(--kw-ink, #14352a);
  color: #fff;
}

[data-kw-shell="v1"] .button-quiet {
  color: var(--kw-muted, #5b7368);
}

[data-kw-shell="v1"] .basis-card {
  display: grid;
  gap: 9px;
  padding-top: 18px;
  border-top: 1px solid var(--kw-line, #d7e3dc);
}

[data-kw-shell="v1"] .equation-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

[data-kw-shell="v1"] .equation-list code {
  min-width: 0;
  padding: 8px 9px;
  border: 1px solid var(--kw-line, #d7e3dc);
  background: var(--kw-page, #fbfdfb);
  color: var(--kw-ink, #14352a);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .scope-note {
  padding-left: 10px;
  border-left: 3px solid var(--kw-line-strong, #abc5b5);
}

[data-kw-shell="v1"] .metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 16px 0 0;
}

[data-kw-shell="v1"] .metric {
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid var(--kw-line, #d7e3dc);
  background: #fff;
}

[data-kw-shell="v1"] .metric dt {
  color: var(--kw-muted, #5b7368);
  font-size: 11px;
  line-height: 1.4;
}

[data-kw-shell="v1"] .metric dd {
  margin: 5px 0 0;
  color: var(--kw-ink, #14352a);
  font-size: 15px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .metric-emphasis dd {
  color: var(--kw-accent, #258357);
  font-size: 19px;
}

[data-kw-shell="v1"] .classification-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  padding: 11px 12px;
  border: 1px solid var(--kw-line, #d7e3dc);
  background: #fff;
}

[data-kw-shell="v1"] .classification-card[data-state="acidic"] {
  border-left: 5px solid #d66b5d;
  background: #fff8f6;
}

[data-kw-shell="v1"] .classification-card[data-state="neutral"] {
  border-left: 5px solid #4d9b67;
  background: #f5fbf6;
}

[data-kw-shell="v1"] .classification-card[data-state="basic"] {
  border-left: 5px solid #4d7eb7;
  background: #f5f9fd;
}

[data-kw-shell="v1"] .classification-label {
  color: var(--kw-muted, #5b7368);
  font-size: 12px;
}

[data-kw-shell="v1"] .classification-card strong {
  color: var(--kw-ink, #14352a);
  font-size: 15px;
}

[data-kw-shell="v1"] .detail-section,
[data-kw-shell="v1"] .scale-section {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

[data-kw-shell="v1"] .detail-section[hidden] {
  display: none;
}

[data-kw-shell="v1"] .formula-used {
  margin: 0;
  padding: 10px 11px;
  border: 1px solid var(--kw-line, #d7e3dc);
  background: #fff;
  color: var(--kw-ink, #14352a);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .steps-list {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 24px;
  color: var(--kw-ink, #14352a);
  font-size: 12px;
  line-height: 1.6;
}

[data-kw-shell="v1"] .ph-scale {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 14px 1fr;
  min-width: 0;
  min-height: 76px;
  padding: 22px 0 22px;
}

[data-kw-shell="v1"] .scale-zone {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 30px;
  color: #172b24;
  font-size: 11px;
  font-weight: 700;
}

[data-kw-shell="v1"] .scale-acidic {
  border-radius: 3px 0 0 3px;
  background: linear-gradient(90deg, #e78a7e, #f3b47c);
}

[data-kw-shell="v1"] .scale-neutral {
  background: #7bc48d;
  font-size: 0;
}

[data-kw-shell="v1"] .scale-neutral span {
  position: absolute;
  top: 56px;
  left: calc(50% + 24px);
  font-size: 10px;
  transform: translateX(-50%);
}

[data-kw-shell="v1"] .scale-basic {
  border-radius: 0 3px 3px 0;
  background: linear-gradient(90deg, #83bdd4, #7b91d4);
}

[data-kw-shell="v1"] .scale-marker {
  position: absolute;
  z-index: 2;
  top: 0;
  left: clamp(0%, var(--marker-position, 50%), 100%);
  width: 2px;
  height: 58px;
  background: #172b24;
  transform: translateX(-1px);
}

[data-kw-shell="v1"] .scale-marker::after {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 9px;
  height: 9px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: #172b24;
  box-shadow: 0 0 0 1px #172b24;
  content: "";
  transform: translate(-50%, 50%);
}

[data-kw-shell="v1"] .scale-marker span {
  position: absolute;
  top: 0;
  left: 50%;
  max-width: 120px;
  padding: 2px 6px;
  background: #172b24;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.4;
  white-space: nowrap;
  transform: translate(-50%, -2px);
}

[data-kw-shell="v1"] .scale-marker[data-edge="start"] span {
  left: 0;
  transform: translate(0, -2px);
}

[data-kw-shell="v1"] .scale-marker[data-edge="end"] span {
  right: 0;
  left: auto;
  transform: translate(0, -2px);
}

[data-kw-shell="v1"] .scale-ticks {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  justify-content: space-between;
  color: var(--kw-muted, #5b7368);
  font-size: 10px;
}

@media (max-width: 900px) {
  [data-kw-shell="v1"] .tool-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  [data-kw-shell="v1"] .calculator-panel,
  [data-kw-shell="v1"] .result-panel {
    padding: 16px;
  }

  [data-kw-shell="v1"] .mode-grid,
  [data-kw-shell="v1"] .metric-grid,
  [data-kw-shell="v1"] .equation-list,
  [data-kw-shell="v1"] .button-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  [data-kw-shell="v1"] .button-row {
    display: grid;
  }

  [data-kw-shell="v1"] .button {
    width: 100%;
    min-height: 44px;
  }

  [data-kw-shell="v1"] .metric dd {
    font-size: 13px;
  }

  [data-kw-shell="v1"] .metric-emphasis dd {
    font-size: 17px;
  }

  [data-kw-shell="v1"] .classification-card {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  [data-kw-shell="v1"] .scale-zone {
    font-size: 10px;
  }
}

@media (max-width: 380px) {
  [data-kw-shell="v1"] .mode-grid,
  [data-kw-shell="v1"] .metric-grid,
  [data-kw-shell="v1"] .equation-list,
  [data-kw-shell="v1"] .button-row {
    grid-template-columns: 1fr;
  }

  [data-kw-shell="v1"] .ph-scale {
    grid-template-columns: 1fr 10px 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-kw-shell="v1"] *,
  [data-kw-shell="v1"] *::before,
  [data-kw-shell="v1"] *::after {
    scroll-behavior: auto;
    transition-duration: 0.01ms;
  }
}