[data-kw-shell="v1"] .tool-shell {
  display: grid;
  grid-template-columns: minmax(360px, 0.96fr) minmax(0, 1.04fr);
  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);
  background: var(--kw-surface);
}

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

[data-kw-shell="v1"] .section-heading {
  min-width: 0;
}

[data-kw-shell="v1"] .section-kicker {
  margin: 0 0 5px;
  color: var(--kw-accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

[data-kw-shell="v1"] .calculator-panel h2,
[data-kw-shell="v1"] .result-panel h2,
[data-kw-shell="v1"] .result-panel h3,
[data-kw-shell="v1"] .content-section h2,
[data-kw-shell="v1"] .content-section h3 {
  margin: 0;
  color: var(--kw-ink);
  line-height: 1.4;
}

[data-kw-shell="v1"] .calculator-panel h2,
[data-kw-shell="v1"] .result-panel h2,
[data-kw-shell="v1"] .content-section h2 {
  font-size: 18px;
}

[data-kw-shell="v1"] .result-panel h3,
[data-kw-shell="v1"] .content-section h3 {
  font-size: 15px;
}

[data-kw-shell="v1"] #calc-form {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

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

[data-kw-shell="v1"] .species-fieldset legend {
  padding: 0 6px;
  color: var(--kw-ink);
  font-size: 13px;
  font-weight: 800;
}

[data-kw-shell="v1"] .species-columns,
[data-kw-shell="v1"] .species-row {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) 72px 104px;
  gap: 6px;
  align-items: center;
  min-width: 0;
}

[data-kw-shell="v1"] .species-columns {
  margin-bottom: 5px;
  color: var(--kw-muted);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.3;
}

[data-kw-shell="v1"] .species-columns span:last-child::after {
  content: " (kJ/mol)";
  font-weight: 500;
}

[data-kw-shell="v1"] .species-row + .species-row {
  margin-top: 7px;
}

[data-kw-shell="v1"] .row-number {
  color: var(--kw-muted);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

[data-kw-shell="v1"] .input-cell {
  min-width: 0;
}

[data-kw-shell="v1"] input[type="text"] {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  box-sizing: border-box;
  padding: 8px 9px;
  border: 1px solid var(--kw-line-strong);
  border-radius: 2px;
  background: #fff;
  color: var(--kw-ink);
  font: inherit;
  font-size: 14px;
  line-height: 1.35;
}

[data-kw-shell="v1"] input[data-field="coefficient"],
[data-kw-shell="v1"] input[data-field="enthalpy"] {
  font-variant-numeric: tabular-nums;
}

[data-kw-shell="v1"] input[aria-invalid="true"] {
  border-color: #a33429;
  background: #fff8f6;
}

[data-kw-shell="v1"] input:focus-visible,
[data-kw-shell="v1"] button:focus-visible {
  outline: 3px solid #d88b22;
  outline-offset: 2px;
}

[data-kw-shell="v1"] .reaction-arrow {
  height: 16px;
  color: var(--kw-accent);
  font-size: 20px;
  font-weight: 800;
  line-height: 16px;
  text-align: center;
}

[data-kw-shell="v1"] .help-text,
[data-kw-shell="v1"] .form-error,
[data-kw-shell="v1"] .scope-card p,
[data-kw-shell="v1"] .result-summary,
[data-kw-shell="v1"] .visual-subtitle,
[data-kw-shell="v1"] .visual-empty,
[data-kw-shell="v1"] .visual-note {
  margin: 0;
  color: var(--kw-muted);
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .form-error {
  padding: 9px 11px;
  border-left: 4px solid #a33429;
  background: #fff3f0;
  color: #842c23;
  font-weight: 700;
}

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

[data-kw-shell="v1"] .button {
  min-height: 44px;
  box-sizing: border-box;
  padding: 8px 14px;
  border: 1px solid var(--kw-line-strong);
  border-radius: 2px;
  background: #fff;
  color: var(--kw-ink);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
}

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

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

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

[data-kw-shell="v1"] .scope-card {
  display: grid;
  gap: 9px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--kw-line);
}

[data-kw-shell="v1"] .formula-line {
  margin: 0;
  padding: 10px 9px;
  border: 1px solid var(--kw-line);
  background: #f7faf8;
  color: var(--kw-ink);
  font-family: "Cambria Math", "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.45;
  text-align: center;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .important-note {
  padding: 9px 10px;
  border-left: 4px solid #b56b2f;
  background: #fbf2e8;
  color: #74451e;
}

[data-kw-shell="v1"] .result-heading-row,
[data-kw-shell="v1"] .visual-heading-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
}

[data-kw-shell="v1"] .status-badge {
  flex: 0 0 auto;
  padding: 3px 8px;
  border: 1px solid var(--kw-line-strong);
  background: var(--kw-paper);
  color: var(--kw-muted);
  font-size: 11px;
  font-weight: 800;
}

[data-kw-shell="v1"] .status-badge[data-state="ready"] {
  border-color: var(--kw-accent);
  background: var(--kw-accent-soft);
  color: var(--kw-accent);
}

[data-kw-shell="v1"] .status-badge[data-state="neutral"] {
  border-color: #7b6f41;
  background: #f5f0d9;
  color: #62572f;
}

[data-kw-shell="v1"] .status-badge[data-state="invalid"] {
  border-color: #a33429;
  background: #fff3f0;
  color: #842c23;
}

[data-kw-shell="v1"] .result-summary {
  min-height: 3.2em;
  margin-top: 10px;
}

[data-kw-shell="v1"] .primary-result {
  display: grid;
  gap: 4px;
  margin-top: 13px;
  padding: 15px;
  border: 1px solid var(--kw-line-strong);
  border-left: 5px solid var(--kw-accent);
  background: #fff;
}

[data-kw-shell="v1"] .primary-result span {
  color: var(--kw-muted);
  font-family: "Cambria Math", "Times New Roman", serif;
  font-size: 13px;
}

[data-kw-shell="v1"] .primary-result strong {
  color: var(--kw-accent);
  font-size: 24px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 10px 0 0;
}

[data-kw-shell="v1"] .metric {
  min-width: 0;
  padding: 10px 11px;
  border: 1px solid var(--kw-line);
  background: #fff;
}

[data-kw-shell="v1"] .metric-emphasis {
  background: var(--kw-accent-soft);
}

[data-kw-shell="v1"] .metric dt {
  color: var(--kw-muted);
  font-size: 11px;
  font-weight: 700;
}

[data-kw-shell="v1"] .metric dd {
  margin: 4px 0 0;
  color: var(--kw-ink);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .metric-emphasis dd {
  color: var(--kw-accent);
  font-size: 16px;
}

[data-kw-shell="v1"] .calculation-details {
  margin-top: 19px;
  padding-top: 16px;
  border-top: 1px solid var(--kw-line);
}

[data-kw-shell="v1"] .contribution-list {
  display: grid;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

[data-kw-shell="v1"] .contribution-list li {
  min-width: 0;
  padding: 7px 9px;
  border-left: 3px solid var(--kw-line-strong);
  background: #fff;
  color: var(--kw-ink);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .contribution-list li[data-side="products"] {
  border-left-color: #2f7f59;
}

[data-kw-shell="v1"] .contribution-list li[data-side="reactants"] {
  border-left-color: #a96631;
}

[data-kw-shell="v1"] .substitution-line,
[data-kw-shell="v1"] .meaning-text {
  margin: 9px 0 0;
  padding: 9px 10px;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .substitution-line {
  border: 1px solid var(--kw-line);
  background: #fff;
  color: var(--kw-ink);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
}

[data-kw-shell="v1"] .meaning-text {
  border-left: 4px solid var(--kw-accent);
  background: #f0f7f3;
  color: var(--kw-ink);
  font-size: 12px;
  line-height: 1.6;
}

[data-kw-shell="v1"] .visual-card {
  margin-top: 20px;
  padding-top: 17px;
  border-top: 1px solid var(--kw-line);
}

[data-kw-shell="v1"] .visual-subtitle {
  margin-top: 3px;
}

[data-kw-shell="v1"] .visual-heading-row output {
  flex: 0 0 auto;
  max-width: 44%;
  color: var(--kw-accent);
  font-size: 11px;
  font-weight: 800;
  text-align: right;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] #enthalpy-diagram {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 11px;
  border: 1px solid var(--kw-line-strong);
  background: var(--kw-paper);
}

[data-kw-shell="v1"] #enthalpy-diagram .plot-background {
  fill: #fbfaf6;
}

[data-kw-shell="v1"] #enthalpy-diagram .panel-divider {
  stroke: #d8ddd7;
  stroke-width: 1;
}

[data-kw-shell="v1"] #enthalpy-diagram .panel-label {
  fill: #687069;
  font-family: var(--kw-font);
  font-size: 12px;
  font-weight: 700;
}

[data-kw-shell="v1"] #enthalpy-diagram .placeholder-text {
  fill: #687069;
  font-family: var(--kw-font);
  font-size: 14px;
}

[data-kw-shell="v1"] #enthalpy-diagram .energy-level {
  stroke: #245b49;
  stroke-width: 4;
  stroke-linecap: round;
}

[data-kw-shell="v1"] #enthalpy-diagram .energy-level.products {
  stroke: #315f93;
}

[data-kw-shell="v1"] #enthalpy-diagram .energy-label,
[data-kw-shell="v1"] #enthalpy-diagram .energy-value,
[data-kw-shell="v1"] #enthalpy-diagram .delta-label,
[data-kw-shell="v1"] #enthalpy-diagram .bar-label,
[data-kw-shell="v1"] #enthalpy-diagram .bar-value,
[data-kw-shell="v1"] #enthalpy-diagram .hess-label {
  fill: #222824;
  font-family: var(--kw-font);
}

[data-kw-shell="v1"] #enthalpy-diagram .energy-label {
  font-size: 12px;
  font-weight: 800;
}

[data-kw-shell="v1"] #enthalpy-diagram .energy-value,
[data-kw-shell="v1"] #enthalpy-diagram .bar-value {
  fill: #687069;
  font-size: 10px;
}

[data-kw-shell="v1"] #enthalpy-diagram .delta-arrow,
[data-kw-shell="v1"] #enthalpy-diagram .hess-direct {
  stroke: #b56032;
  stroke-width: 2.4;
  marker-end: url(#arrow-head);
}

[data-kw-shell="v1"] #enthalpy-diagram .delta-arrow.is-zero {
  marker-start: url(#arrow-head-start);
}

[data-kw-shell="v1"] #enthalpy-diagram .delta-label {
  fill: #9a542b;
  font-size: 11px;
  font-weight: 800;
}

[data-kw-shell="v1"] #enthalpy-diagram .bar-axis {
  stroke: #89928a;
  stroke-width: 1;
}

[data-kw-shell="v1"] #enthalpy-diagram .bar-positive {
  fill: #b86d32;
}

[data-kw-shell="v1"] #enthalpy-diagram .bar-negative {
  fill: #2f7f59;
}

[data-kw-shell="v1"] #enthalpy-diagram .bar-zero {
  fill: #9fa79f;
}

[data-kw-shell="v1"] #enthalpy-diagram .bar-label {
  font-size: 10px;
}

[data-kw-shell="v1"] #enthalpy-diagram .hess-box {
  fill: #fff;
  stroke: #9fa79f;
  stroke-width: 1;
}

[data-kw-shell="v1"] #enthalpy-diagram .hess-path {
  fill: none;
  stroke: #9fa79f;
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
}

[data-kw-shell="v1"] #enthalpy-diagram .hess-label {
  font-size: 10px;
  font-weight: 700;
}

[data-kw-shell="v1"] .visual-empty {
  min-height: 1.5em;
  margin-top: 5px;
}

[data-kw-shell="v1"] .visual-note {
  margin-top: 7px;
  padding: 8px 9px;
  border-left: 3px solid var(--kw-accent);
  background: #f7faf8;
}

[data-kw-shell="v1"] .content-section {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--kw-line-strong);
}

[data-kw-shell="v1"] .steps-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--kw-line);
  border-left: 1px solid var(--kw-line);
  list-style: none;
  counter-reset: steps;
}

[data-kw-shell="v1"] .steps-list li {
  position: relative;
  min-width: 0;
  padding: 34px 11px 12px;
  border-right: 1px solid var(--kw-line);
  border-bottom: 1px solid var(--kw-line);
  counter-increment: steps;
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .steps-list li::before {
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  top: 8px;
  left: 11px;
  color: var(--kw-accent);
  font-size: 11px;
  font-weight: 800;
}

[data-kw-shell="v1"] .meaning-card {
  margin-top: 18px;
  border: 1px solid var(--kw-line);
}

[data-kw-shell="v1"] .meaning-card h3 {
  padding: 9px 11px;
  border-bottom: 1px solid var(--kw-line);
  color: var(--kw-accent);
}

[data-kw-shell="v1"] .meaning-card ul {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

[data-kw-shell="v1"] .meaning-card li {
  min-width: 0;
  padding: 10px 11px;
  border-right: 1px solid var(--kw-line);
  color: var(--kw-muted);
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .meaning-card li:last-child {
  border-right: 0;
}

[data-kw-shell="v1"] [hidden] {
  display: none !important;
}

@media (max-width: 940px) {
  [data-kw-shell="v1"] .tool-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  [data-kw-shell="v1"] .calculator-panel,
  [data-kw-shell="v1"] .result-panel {
    padding: 16px;
  }

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

  [data-kw-shell="v1"] .meaning-card ul {
    grid-template-columns: 1fr;
  }

  [data-kw-shell="v1"] .meaning-card li {
    border-right: 0;
    border-bottom: 1px solid var(--kw-line);
  }

  [data-kw-shell="v1"] .meaning-card li:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 520px) {
  [data-kw-shell="v1"] .calculator-panel,
  [data-kw-shell="v1"] .result-panel {
    padding: 14px;
  }

  [data-kw-shell="v1"] .species-fieldset {
    padding: 9px 7px;
  }

  [data-kw-shell="v1"] .species-columns,
  [data-kw-shell="v1"] .species-row {
    grid-template-columns: 22px minmax(0, 1fr) 68px 92px;
    gap: 4px;
  }

  [data-kw-shell="v1"] .species-columns span:last-child::after {
    content: "";
  }

  [data-kw-shell="v1"] input[type="text"] {
    min-height: 44px;
    padding-inline: 7px;
    font-size: 13px;
  }

  [data-kw-shell="v1"] .button-row {
    display: grid;
    grid-template-columns: 1fr;
  }

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

  [data-kw-shell="v1"] .result-heading-row,
  [data-kw-shell="v1"] .visual-heading-row {
    display: grid;
  }

  [data-kw-shell="v1"] .status-badge {
    justify-self: start;
  }

  [data-kw-shell="v1"] .visual-heading-row output {
    max-width: none;
    text-align: left;
  }

  [data-kw-shell="v1"] .metric-grid,
  [data-kw-shell="v1"] .steps-list {
    grid-template-columns: 1fr;
  }

  [data-kw-shell="v1"] .primary-result strong {
    font-size: 21px;
  }
}

@media (max-width: 370px) {
  [data-kw-shell="v1"] .species-columns,
  [data-kw-shell="v1"] .species-row {
    grid-template-columns: 20px minmax(0, 1fr) 62px 84px;
  }

  [data-kw-shell="v1"] input[type="text"] {
    padding-inline: 5px;
    font-size: 12px;
  }
}

@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;
    animation-duration: 0.01ms;
  }
}