:root {
  --wpw-accent: #0b57d0;
}

.wpw-domain-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.wpw-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

@media (max-width: 640px) {
  .wpw-grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 860px) {
  .wpw-domain-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.wpw-domain-card {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  padding: 12px;
  text-align: left;
  cursor: pointer;
}

html.dark .wpw-domain-card {
  background: rgba(0, 0, 0, 0.25);
  border-color: rgba(255, 255, 255, 0.15);
}

.wpw-domain-card--active {
  border-color: var(--wpw-accent);
  box-shadow: 0 0 0 2px rgba(11, 87, 208, 0.12);
}

.wpw-domain-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.chip {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: rgba(255, 255, 255, 0.85);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
}

html.dark .chip {
  background: rgba(0, 0, 0, 0.25);
  border-color: rgba(255, 255, 255, 0.15);
}

.chip:hover {
  border-color: rgba(11, 87, 208, 0.55);
}

.wpw-field {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 12px;
}

.wpw-field .wpw-unit {
  margin-left: 0;
}

@media (min-width: 860px) {
  .wpw-field {
    grid-template-columns: 200px minmax(0, 1fr) 140px;
    align-items: start;
  }
  .wpw-field .label {
    margin-top: 10px;
  }
  .wpw-field .wpw-field-error {
    grid-column: 2 / 4;
  }
}

.wpw-output-unit-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wpw-disabled {
  opacity: 0.7;
}

.wpw-invalid {
  border-color: #b00020;
}

.wpw-field-error {
  color: #b00020;
  min-height: 1.2em;
}

.wpw-banner {
  border-radius: 12px;
  padding: 10px 12px;
  margin: 10px 0;
}

.wpw-banner-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.wpw-banner--error {
  background: rgba(176, 0, 32, 0.08);
  border: 1px solid rgba(176, 0, 32, 0.25);
}

.wpw-banner--warn {
  background: rgba(255, 193, 7, 0.12);
  border: 1px solid rgba(255, 193, 7, 0.28);
}

.wpw-kv {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 4px 0;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.12);
}

html.dark .wpw-kv {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.wpw-k {
  opacity: 0.85;
}

.wpw-v {
  font-weight: 600;
}

.wpw-svg {
  width: 100%;
  height: auto;
  max-width: 720px;
}

.wpw-svg [data-part] {
  cursor: pointer;
}

.wpw-svg-active {
  filter: drop-shadow(0 0 4px rgba(11, 87, 208, 0.25));
}

.wpw-formula-list {
  margin: 0;
  padding-left: 18px;
}

.wpw-formula-blocks {
  display: grid;
  gap: 12px;
}

@media (min-width: 860px) {
  .wpw-formula-blocks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.wpw-formula-card {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  padding: 10px 12px;
}

html.dark .wpw-formula-card {
  background: rgba(0, 0, 0, 0.25);
  border-color: rgba(255, 255, 255, 0.15);
}

.wpw-formula-title {
  font-weight: 700;
  margin-bottom: 6px;
}

.wpw-eq-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  padding: 4px 0;
}

.wpw-math-seq {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-variant-numeric: tabular-nums;
}

.wpw-math-var {
  font-weight: 700;
}

.wpw-math-value {
  font-weight: 700;
}

.wpw-math-approx {
  opacity: 0.75;
  font-weight: 500;
}

.wpw-frac {
  display: inline-grid;
  grid-template-rows: auto auto;
  align-items: center;
  justify-items: center;
  line-height: 1.05;
  vertical-align: middle;
  margin: 0 1px;
}

.wpw-frac .wpw-math-seq {
  flex-wrap: nowrap;
}

.wpw-frac-num {
  padding: 0 6px 1px;
  border-bottom: 2px solid currentColor;
}

.wpw-frac-den {
  padding: 1px 6px 0;
}

.wpw-math-sub {
  display: inline-flex;
  align-items: flex-end;
}

.wpw-math-sub sub {
  font-size: 0.72em;
  line-height: 1;
  margin-left: 1px;
}

.wpw-latex {
  margin-top: 10px;
}

.wpw-latex pre {
  margin: 6px 0 0;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.04);
  overflow: auto;
}

html.dark .wpw-latex pre {
  background: rgba(255, 255, 255, 0.08);
}

.wpw-step-card {
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 12px;
  padding: 10px 12px;
  margin-top: 10px;
}

html.dark .wpw-step-card {
  border-color: rgba(255, 255, 255, 0.15);
}

.wpw-step-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.wpw-issue {
  border-radius: 12px;
  padding: 10px 12px;
  margin-top: 10px;
}

.wpw-issue-title {
  font-weight: 700;
  margin-bottom: 4px;
}

.wpw-issue--ok {
  background: rgba(11, 87, 208, 0.08);
  border: 1px solid rgba(11, 87, 208, 0.18);
}

.wpw-issue--warn {
  background: rgba(255, 193, 7, 0.12);
  border: 1px solid rgba(255, 193, 7, 0.28);
}

.wpw-issue--error {
  background: rgba(176, 0, 32, 0.08);
  border: 1px solid rgba(176, 0, 32, 0.25);
}

.wpw-toast {
  margin-top: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  display: inline-block;
  background: rgba(11, 87, 208, 0.12);
  border: 1px solid rgba(11, 87, 208, 0.18);
}

.wpw-teacher .wpw-svg {
  max-width: 980px;
}

.wpw-reduced-motion * {
  transition: none !important;
  animation: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .wpw-svg-active {
    filter: none;
  }
}