.tool-shell {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  overflow: hidden;
  border-top: 4px solid var(--volt-deep);
}
.tool-form,
.tool-result {
  padding: clamp(22px, 3.5vw, 38px);
}
.tool-form {
  background: var(--surface);
}
.tool-result {
  background: var(--ground);
  border-left: 1px solid var(--line);
  min-height: 520px;
}
.tool-result[hidden] {
  display: none;
}
.tool-placeholder {
  min-height: 440px;
  display: grid;
  place-content: center;
  color: var(--ink-3);
  text-align: center;
  padding: 30px;
}
.tool-placeholder[hidden] {
  display: none;
}
.tool-placeholder-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  background: var(--surface);
  color: var(--charge);
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 700;
}
.tool-section-title {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--charge);
  margin: 0 0 14px;
}
.tool-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}
.tool-field {
  min-width: 0;
}
.tool-field-wide {
  grid-column: 1 / -1;
}
.tool-help {
  margin: 6px 0 0;
  color: var(--ink-3);
  font-size: .78rem;
  line-height: 1.45;
}
.tool-unit {
  position: relative;
}
.tool-unit input {
  padding-right: 62px;
}
.tool-unit span {
  position: absolute;
  right: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: .76rem;
  pointer-events: none;
}
.tool-fieldset + .tool-fieldset {
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 26px;
}
.tool-actions .btn {
  min-height: 48px;
}
.tool-reset {
  border: 0;
  background: transparent;
  color: var(--ink-3);
  text-decoration: underline;
  cursor: pointer;
  font: inherit;
  padding: 10px;
}
.tool-verdict {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line-2);
}
.tool-verdict-icon {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--volt);
  font-weight: 800;
}
.tool-verdict h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  margin-bottom: 5px;
}
.tool-verdict p {
  margin: 0;
  color: var(--ink-2);
  font-size: .92rem;
}
.tool-models {
  display: grid;
  gap: 12px;
}
.tool-model {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.tool-model img {
  width: 86px;
  height: 76px;
  object-fit: contain;
}
.tool-model h3 {
  margin: 0 0 3px;
  font-size: 1rem;
}
.tool-model-meta {
  margin: 0 0 8px;
  color: var(--ink-3);
  font-size: .75rem;
}
.tool-model ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-2);
  font-size: .83rem;
  line-height: 1.45;
}
.tool-model li + li {
  margin-top: 4px;
}
.tool-model-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
  font-size: .8rem;
  font-weight: 600;
}
.tool-notice {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 7px;
  background: var(--warn-tint);
  color: #604107;
  font-size: .84rem;
}
.tool-notice strong {
  display: block;
  margin-bottom: 3px;
}
.tool-notice ul {
  margin: 7px 0 0;
  padding-left: 18px;
}
.tool-notice.is-calm {
  background: var(--charge-tint);
  color: var(--charge);
}
.tool-disclaimer {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-2);
  color: var(--ink-3);
  font-size: .76rem;
  line-height: 1.55;
}
.tool-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0;
}
.tool-metric {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 15px;
}
.tool-metric-label {
  display: block;
  color: var(--ink-3);
  font-size: .73rem;
  margin-bottom: 5px;
}
.tool-metric-value {
  display: block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.15;
}
.tool-metric.is-accent {
  background: var(--volt-tint);
  border-color: var(--volt-deep);
}
.tool-bars {
  display: grid;
  gap: 12px;
  margin: 20px 0;
}
.tool-bar-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: .82rem;
  margin-bottom: 5px;
}
.tool-bar-track {
  height: 12px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.tool-bar-fill {
  height: 100%;
  width: 0;
  background: var(--ink-3);
  border-radius: inherit;
  transition: width .3s ease;
}
.tool-bar-fill.is-electric {
  background: var(--volt-deep);
}
.tool-form details,
.tool-result details {
  margin-top: 16px;
  border-top: 1px solid var(--line-2);
  padding-top: 12px;
}
.tool-form summary,
.tool-result summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--charge);
}
.tool-form details p,
.tool-result details p {
  margin: 8px 0 0;
  color: var(--ink-2);
  font-size: .85rem;
}
.tool-radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}
.tool-radio {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 9px 12px;
  background: var(--ground);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
}
.tool-radio input {
  accent-color: var(--charge);
}
.tool-hub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.tool-hub-card {
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 3vw, 30px);
  text-decoration: none;
  color: var(--ink);
  transition: transform .15s ease, border-color .15s ease;
}
.tool-hub-card:hover {
  transform: translateY(-2px);
  border-color: var(--volt-deep);
}
.tool-hub-number {
  font-family: var(--mono);
  color: var(--charge);
  font-size: .72rem;
  letter-spacing: .1em;
}
.tool-hub-card h2,
.tool-hub-card h3 {
  margin: 14px 0 8px;
}
.tool-hub-card p {
  color: var(--ink-2);
  margin-bottom: 18px;
}
.tool-hub-meta {
  margin-top: auto;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-3);
}
.tool-hub-link {
  margin-top: 12px;
  color: var(--charge);
  font-weight: 700;
}
@media (max-width: 860px) {
  .tool-shell {
    grid-template-columns: 1fr;
  }
  .tool-result {
    border-left: 0;
    border-top: 1px solid var(--line);
    min-height: 0;
  }
  .tool-placeholder {
    min-height: 220px;
  }
}
@media (max-width: 620px) {
  .tool-fields,
  .tool-metrics,
  .tool-hub-grid {
    grid-template-columns: 1fr;
  }
  .tool-field-wide {
    grid-column: auto;
  }
  .tool-form,
  .tool-result {
    padding: 20px 17px;
  }
  .tool-model {
    grid-template-columns: 68px minmax(0, 1fr);
  }
  .tool-model img {
    width: 68px;
    height: 62px;
  }
}

/* ---- design v2 overrides ---- */
.tool-shell {
  border-top: 4px solid var(--volt);
  border-radius: var(--r-lg);
}
.tool-result {
  background: var(--paper);
}
.tool-section-title {
  letter-spacing: .14em;
}
.tool-placeholder-mark {
  background: var(--ink);
  color: var(--volt);
  border: 0;
  border-radius: 6px;
}
.tool-verdict-icon {
  border-radius: 4px;
}
.tool-hub-card {
  border-top: 4px solid var(--ink);
  transition: transform .15s ease, box-shadow .15s ease;
}
.tool-hub-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.tool-hub-number {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--charge);
}
.tool-hub-link {
  color: var(--charge);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}