[data-kw-shell="v1"] .intro {
  margin-bottom: 18px;
}

[data-kw-shell="v1"] .intro h1 {
  margin: 8px 0 10px;
  font-size: clamp(1.75rem, 3vw, 2.45rem);
  line-height: 1.2;
}

[data-kw-shell="v1"] .eyebrow,
[data-kw-shell="v1"] .section-kicker {
  margin: 0;
  color: #17604f;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

[data-kw-shell="v1"] .lead {
  max-width: 760px;
  margin: 0;
  line-height: 1.8;
}

[data-kw-shell="v1"] .tool-shell {
  display: grid;
  grid-template-columns: minmax(240px, .86fr) minmax(0, 1.14fr);
  gap: 20px;
  align-items: start;
  min-width: 0;
}

[data-kw-shell="v1"] .calculator-panel,
[data-kw-shell="v1"] .result-panel {
  min-width: 0;
  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"] .field-group {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

[data-kw-shell="v1"] .field-group:last-child {
  margin-bottom: 0;
}

[data-kw-shell="v1"] label {
  color: var(--kw-ink, #14352a);
  font-size: 13px;
  font-weight: 700;
}

[data-kw-shell="v1"] select,
[data-kw-shell="v1"] textarea {
  box-sizing: border-box;
  width: 100%;
  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"] select {
  min-height: 46px;
  padding: 9px 12px;
}

[data-kw-shell="v1"] textarea {
  min-height: 190px;
  padding: 12px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  line-height: 1.6;
}

[data-kw-shell="v1"] select:focus-visible,
[data-kw-shell="v1"] textarea:focus-visible,
[data-kw-shell="v1"] button:focus-visible {
  outline: 2px solid var(--kw-accent, #258357);
  outline-offset: 2px;
}

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

[data-kw-shell="v1"] .help-text,
[data-kw-shell="v1"] .form-error,
[data-kw-shell="v1"] .scope-card p,
[data-kw-shell="v1"] .result-status,
[data-kw-shell="v1"] .orientation {
  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: 40px;
  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"] .scope-card {
  display: grid;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--kw-line, #d7e3dc);
}

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

[data-kw-shell="v1"] .mass-card {
  display: grid;
  gap: 7px;
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--kw-line-strong, #abc5b5);
  background: #fff;
}

[data-kw-shell="v1"] .mass-card[data-state="ready"] {
  border-color: var(--kw-accent, #258357);
}

[data-kw-shell="v1"] .mass-card[data-state="error"] {
  border-color: #ad3f32;
}

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

[data-kw-shell="v1"] #mass-value {
  display: block;
  color: var(--kw-accent, #258357);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 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-wide {
  grid-column: 1 / -1;
}

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

[data-kw-shell="v1"] .metric dd {
  margin: 5px 0 0;
  color: var(--kw-ink, #14352a);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .complement-card {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid var(--kw-line, #d7e3dc);
  background: #fff;
}

[data-kw-shell="v1"] .complement-card h3 {
  margin-bottom: 6px;
  font-size: 15px;
}

[data-kw-shell="v1"] #complement-value {
  display: block;
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--kw-line, #d7e3dc);
  color: var(--kw-ink, #14352a);
  font: 600 14px/1.6 ui-monospace, SFMono-Regular, Consolas, monospace;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

[data-kw-shell="v1"] .content-section {
  margin-top: 46px;
}

[data-kw-shell="v1"] .section-heading h2 {
  margin: 8px 0 18px;
  font-size: 1.45rem;
  line-height: 1.35;
}

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

[data-kw-shell="v1"] .formula-list article {
  display: grid;
  gap: 7px;
  margin: -1px 0 0 -1px;
  padding: 18px;
  border: 1px solid var(--kw-line, #d7e3dc);
}

[data-kw-shell="v1"] .formula-list strong {
  font-size: .95rem;
  overflow-wrap: anywhere;
}

[data-kw-shell="v1"] .formula-list span {
  color: var(--kw-muted, #5b7368);
  font-size: .84rem;
}

[data-kw-shell="v1"] .proof-guide {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--kw-line, #d7e3dc);
}

[data-kw-shell="v1"] .proof-guide h3 {
  margin: 0 0 12px;
  font-size: 15px;
}

[data-kw-shell="v1"] .proof-guide ul {
  margin: 0;
  padding-left: 22px;
}

[data-kw-shell="v1"] .proof-guide li {
  line-height: 1.8;
}

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

  [data-kw-shell="v1"] .metric-wide {
    grid-column: auto;
  }

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

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

  [data-kw-shell="v1"] .content-section {
    margin-top: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-kw-shell="v1"] *,
  [data-kw-shell="v1"] *::before,
  [data-kw-shell="v1"] *::after {
    scroll-behavior: auto;
    transition-duration: .01ms;
  }
}