#js-tool-container-natural-gravel-mass-calc .ngr-app {
  --ngr-pebble: #5d6b75;
  --ngr-pebble-2: #7d8b94;
  --ngr-void: #8aa4b3;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
html[data-theme="dark"] #js-tool-container-natural-gravel-mass-calc .ngr-app {
  --ngr-pebble: #8b9aa6;
  --ngr-pebble-2: #a7b4bc;
  --ngr-void: #6f8b99;
}
#js-tool-container-natural-gravel-mass-calc .tb-zone {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
#js-tool-container-natural-gravel-mass-calc .tb-grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px 20px;
}
#js-tool-container-natural-gravel-mass-calc .tb-span-all { grid-column: 1 / -1; }
#js-tool-container-natural-gravel-mass-calc .tb-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
#js-tool-container-natural-gravel-mass-calc .tb-hint {
  font-size: 0.82rem;
  line-height: 1.35;
  color: var(--text-muted);
}
#js-tool-container-natural-gravel-mass-calc .tb-fieldset {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 18px 18px;
  margin: 0;
}
#js-tool-container-natural-gravel-mass-calc .tb-legend {
  padding: 0 6px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
#js-tool-container-natural-gravel-mass-calc .ngr-hero {
  border: 1px solid var(--border-color);
  border-radius: 22px;
  background: var(--accent-light);
  padding: 18px 20px;
  min-height: 132px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
#js-tool-container-natural-gravel-mass-calc .ngr-hero.is-error {
  background: var(--danger-light);
}
#js-tool-container-natural-gravel-mass-calc .tb-hero-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}
#js-tool-container-natural-gravel-mass-calc .tb-hero-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
#js-tool-container-natural-gravel-mass-calc .tb-hero-value {
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  font-weight: 700;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
#js-tool-container-natural-gravel-mass-calc .tb-unit {
  font-size: 1rem;
  color: var(--text-secondary);
}
#js-tool-container-natural-gravel-mass-calc .tb-hero-note {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.4;
}
#js-tool-container-natural-gravel-mass-calc .tb-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
#js-tool-container-natural-gravel-mass-calc .tb-chip {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
}
#js-tool-container-natural-gravel-mass-calc .tb-status {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}
#js-tool-container-natural-gravel-mass-calc .tb-status.is-danger {
  background: var(--danger-light);
  color: var(--text-primary);
}
#js-tool-container-natural-gravel-mass-calc .ngr-pack {
  position: relative;
  height: 92px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-secondary);
}
#js-tool-container-natural-gravel-mass-calc .ngr-pebble {
  position: absolute;
  display: block;
  border-radius: 50%;
  background: var(--ngr-pebble);
  opacity: 0.88;
}
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p2,
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p4,
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p6,
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p8 {
  background: var(--ngr-pebble-2);
}
#js-tool-container-natural-gravel-mass-calc .ngr-pack.is-fine .ngr-pebble { width: 22px; height: 22px; }
#js-tool-container-natural-gravel-mass-calc .ngr-pack.is-mid .ngr-pebble { width: 32px; height: 32px; }
#js-tool-container-natural-gravel-mass-calc .ngr-pack.is-coarse .ngr-pebble { width: 42px; height: 42px; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p1 { left: 8%; top: 18%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p2 { left: 22%; top: 48%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p3 { left: 36%; top: 14%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p4 { left: 48%; top: 52%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p5 { left: 62%; top: 20%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p6 { left: 74%; top: 50%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p7 { left: 86%; top: 16%; }
#js-tool-container-natural-gravel-mass-calc .ngr-pebble.p8 { left: 10%; top: 62%; }
#js-tool-container-natural-gravel-mass-calc .ngr-void {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
#js-tool-container-natural-gravel-mass-calc .ngr-void-track {
  height: 10px;
  border-radius: 999px;
  background: var(--bg-tertiary);
  overflow: hidden;
  border: 1px solid var(--border-color);
}
#js-tool-container-natural-gravel-mass-calc .ngr-void-fill {
  display: block;
  height: 100%;
  width: 44%;
  background: var(--ngr-void);
}
#js-tool-container-natural-gravel-mass-calc .ngr-void span,
#js-tool-container-natural-gravel-mass-calc .ngr-delta-line {
  margin: 0;
  font-size: 0.84rem;
  color: var(--text-secondary);
}
#js-tool-container-natural-gravel-mass-calc .tb-spec {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#js-tool-container-natural-gravel-mass-calc .tb-spec-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}
#js-tool-container-natural-gravel-mass-calc .tb-spec-norm {
  color: var(--text-muted);
  font-size: 0.82rem;
}
#js-tool-container-natural-gravel-mass-calc .tb-field-error {
  font-size: 0.82rem;
  color: var(--danger);
}
@media (max-width: 640px) {
  #js-tool-container-natural-gravel-mass-calc .ngr-app { gap: 10px; }
  #js-tool-container-natural-gravel-mass-calc .tb-grid-3 { grid-template-columns: 1fr; }
  #js-tool-container-natural-gravel-mass-calc .tb-spec-row { grid-template-columns: 1fr; }
}