:root {
  --volume-primary: #0b6f8f;
  --volume-primary-dark: #084e67;
  --volume-accent: #56c4e8;
  --volume-water: #bdd2ea;
  --volume-water-strong: #2f9fca;
  --volume-ink: #17212b;
  --volume-muted: #607080;
  --volume-soft: #eef5f7;
  --volume-card: #ffffff;
  --volume-border: #d8e5ea;
  --volume-danger: #b42318;
  --volume-success: #087443;
  --volume-shadow: 0 18px 44px rgba(15, 43, 56, 0.11);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f5f8fa;
  color: var(--volume-ink);
  font-family: Arial, Helvetica, sans-serif;
}

.volume-tool {
  width: 100%;
  color: var(--volume-ink);
}

.volume-tool--standalone {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 16px;
}

.volume-tool__bar,
.volume-panel {
  border: 1px solid var(--volume-border);
  background: var(--volume-card);
  box-shadow: var(--volume-shadow);
}

.volume-tool__bar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 18px;
  padding: 24px;
  border-radius: 8px;
}

.volume-tool__eyebrow {
  margin: 0 0 8px;
  color: var(--volume-primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.volume-tool h1,
.volume-tool h2,
.volume-tool h3,
.volume-tool p {
  letter-spacing: 0;
}

.volume-tool__bar h1,
.volume-tool__bar h2 {
  margin: 0;
  font-size: 25px;
  line-height: 1.2;
}

.volume-tool__bar p:last-child {
  max-width: 760px;
  margin: 10px 0 0;
  color: var(--volume-muted);
  line-height: 1.6;
}

.volume-tool__badge {
  flex: 0 0 auto;
  border: 1px solid rgba(11, 111, 143, 0.25);
  background: #e9f8fc;
  color: var(--volume-primary-dark);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.volume-tool__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

.volume-panel {
  border-radius: 8px;
  padding: 20px;
}

.volume-note {
  margin-bottom: 16px;
  border-left: 4px solid var(--volume-primary);
  background: var(--volume-soft);
  padding: 12px 14px;
  color: var(--volume-muted);
  font-size: 13px;
  line-height: 1.5;
}

.volume-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.volume-field--wide {
  margin-bottom: 14px;
}

.volume-field label {
  color: var(--volume-ink);
  font-size: 13px;
  font-weight: 800;
}

.volume-field input,
.volume-field select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--volume-border);
  border-radius: 7px;
  background: #fff;
  color: var(--volume-ink);
  padding: 10px 12px;
  font: inherit;
  outline: none;
}

.volume-field input:focus,
.volume-field select:focus {
  border-color: var(--volume-primary);
  box-shadow: 0 0 0 3px rgba(11, 111, 143, 0.14);
}

.volume-input-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 6px;
}

.volume-input-group[hidden],
.volume-field[hidden] {
  display: none !important;
}

.volume-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.volume-button {
  min-height: 44px;
  border: 1px solid var(--volume-border);
  border-radius: 7px;
  background: #fff;
  color: var(--volume-ink);
  padding: 10px 16px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.volume-button--primary {
  border-color: var(--volume-primary);
  background: var(--volume-primary);
  color: #fff;
}

.volume-button:hover {
  filter: brightness(0.98);
}

.volume-message {
  min-height: 24px;
  margin-top: 12px;
  color: var(--volume-muted);
  font-size: 13px;
  line-height: 1.5;
}

.volume-message.is-error {
  color: var(--volume-danger);
  font-weight: 800;
}

.volume-message.is-success {
  color: var(--volume-success);
  font-weight: 800;
}

.volume-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.volume-section-head h2,
.volume-section-head h3 {
  margin: 0;
  font-size: 17px;
}

.volume-svg-shell {
  display: flex;
  min-height: 380px;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--volume-border);
  border-radius: 8px;
  background: linear-gradient(180deg, #fbfdfe, #f2f8fa);
  overflow: hidden;
}

.volume-svg-shell svg {
  width: 100%;
  height: auto;
  display: block;
}

.volume-results {
  margin-top: 18px;
}

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

.volume-result-card {
  min-height: 86px;
  border: 1px solid var(--volume-border);
  border-radius: 8px;
  background: #fbfdfe;
  padding: 14px;
}

.volume-result-card__label {
  display: block;
  margin-bottom: 8px;
  color: var(--volume-muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.volume-result-card__value {
  color: var(--volume-ink);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.volume-result-card--empty {
  grid-column: 1 / -1;
  color: var(--volume-muted);
}

.volume-geometry {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  margin-top: 16px;
  border-top: 1px solid var(--volume-border);
  padding-top: 16px;
  color: var(--volume-muted);
  font-size: 13px;
  line-height: 1.5;
}

.volume-geometry div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #edf4f6;
  padding-bottom: 8px;
}

.volume-geometry strong {
  color: var(--volume-ink);
}

.volume-svg-label {
  fill: var(--volume-muted);
  font: 13px Arial, Helvetica, sans-serif;
}

.volume-svg-outline {
  fill: none;
  stroke: #18313d;
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}

.volume-svg-level {
  stroke: #0b6f8f;
  stroke-width: 2.5;
  stroke-dasharray: 7 5;
  vector-effect: non-scaling-stroke;
}

.volume-svg-empty {
  fill: #f8fbfc;
}

.volume-svg-water {
  fill: var(--volume-water);
  fill-opacity: 1;
  stroke: none;
}

.volume-svg-view-title {
  fill: var(--volume-ink);
  font: 700 13px Arial, Helvetica, sans-serif;
}

.volume-svg-divider {
  stroke: var(--volume-border);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

@media (max-width: 920px) {
  .volume-tool__grid {
    grid-template-columns: 1fr;
  }

  .volume-result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .volume-tool--standalone {
    padding: 18px 10px;
  }

  .volume-tool__bar {
    flex-direction: column;
    padding: 18px;
  }

  .volume-tool__bar h1,
  .volume-tool__bar h2 {
    font-size: 21px;
  }

  .volume-input-group,
  .volume-result-grid,
  .volume-geometry {
    grid-template-columns: 1fr;
  }
}