.hxmass-app {
  --hxmass-hot: #c2410c;
  --hxmass-cold: #075985;
}

.hxmass-form {
  display: grid;
  gap: 18px;
}

.hxmass-form__section {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.hxmass-form__section + .hxmass-form__section {
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.hxmass-form__section--visual {
  padding-top: 10px;
}

.hxmass-two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hxmass-value-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(130px, 0.55fr);
  gap: 10px;
}

.hxmass-schematic {
  min-height: 220px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.9), rgba(232,241,250,0.75));
  overflow: hidden;
}

.hxmass-schematic img {
  display: block;
  width: min(100%, 640px);
  max-height: 320px;
  object-fit: contain;
  padding: 18px;
}

.hxmass-shell {
  fill: url(#hxBody);
  stroke: #2563eb;
  stroke-width: 3;
}

.hxmass-tube {
  fill: none;
  stroke: #0f172a;
  stroke-width: 7;
  stroke-linecap: round;
}

.hxmass-pipe,
.hxmass-arrow,
.hxmass-duty,
.hxmass-duty-head {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hxmass-pipe--cold,
.hxmass-arrow--cold {
  stroke: var(--hxmass-cold);
}

.hxmass-pipe--hot,
.hxmass-arrow--hot {
  stroke: var(--hxmass-hot);
}

.hxmass-pipe {
  stroke-width: 10;
}

.hxmass-arrow {
  stroke-width: 5;
}

.hxmass-duty,
.hxmass-duty-head {
  stroke: #0f766e;
  stroke-width: 5;
}

.hxmass-schematic text {
  fill: #172033;
  font: 800 22px Arial, Helvetica, sans-serif;
}

.hxmass-alerts {
  display: grid;
  gap: 10px;
}

.hxmass-alert {
  padding: 12px 14px;
  border: 1px solid rgba(188, 55, 55, 0.24);
  border-radius: 14px;
  background: rgba(188, 55, 55, 0.08);
  color: #8f2d2d;
  font-size: 0.92rem;
  font-weight: 700;
}

.hxmass-unit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hxmass-unit-field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.hxmass-unit-field label {
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 800;
}

.hxmass-unit-field select {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--color-surface);
  color: var(--ink);
  font: inherit;
  outline: none;
}

.hxmass-unit-field select:focus {
  border-color: var(--color-primary-hover);
  box-shadow: 0 0 0 4px var(--color-state-focus-ring);
}

.hxmass-result-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.hxmass-result-grid .thermoprops-result-card {
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.hxmass-result-grid .thermoprops-result-card__value small {
  color: var(--muted);
  font-size: 0.78rem;
}

.thermoprops-empty {
  grid-column: 1 / -1;
  min-height: 96px;
  display: grid;
  place-items: center;
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: 14px;
  color: var(--muted);
  font-weight: 800;
  text-align: center;
}

.hxmass-result-card__hint {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.hxmass-notes summary {
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
}

.hxmass-notes p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

@media (max-width: 960px) {
  .hxmass-two-col,
  .hxmass-unit-grid,
  .hxmass-result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .hxmass-two-col,
  .hxmass-value-unit,
  .hxmass-unit-grid,
  .hxmass-result-grid {
    grid-template-columns: 1fr;
  }

  .hxmass-schematic {
    min-height: 180px;
  }

  .hxmass-schematic img {
    max-height: 240px;
  }
}