.energy-app {
  --app-surface: #fbfaf6;
  --app-panel: #fffefa;
  --app-ink: #222824;
  --app-muted: #687069;
  --app-line: #cfd3cc;
  --app-line-strong: #9fa79f;
  --app-accent: #245b49;
  --app-accent-strong: #173f32;
  --app-accent-soft: #e2ebe5;
  --app-danger: #9b2f2f;
  --app-danger-soft: #f8e9e7;
  --producer: #456f55;
  --primary: #638b62;
  --secondary: #a08442;
  --tertiary: #9a5a3b;
  min-width: 0;
}

.energy-app .main-content,
.energy-app .main-content * {
  box-sizing: border-box;
}

.energy-app button,
.energy-app input,
.energy-app select {
  font: inherit;
}

.energy-app :focus-visible {
  outline: 3px solid var(--app-accent);
  outline-offset: 3px;
}

.energy-app .section-kicker {
  margin: 0 0 5px;
  color: var(--app-accent);
  font-size: .78rem;
  font-weight: 780;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.energy-app .tool-shell,
.energy-app .calculator-panel,
.energy-app .result-panel,
.energy-app .energy-input-grid,
.energy-app .efficiency-grid,
.energy-app .level-metrics,
.energy-app .loss-metrics,
.energy-app .formula-list {
  min-width: 0;
}

.energy-app .tool-shell {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  border: 1px solid var(--app-line-strong);
  background: var(--app-surface);
}

.energy-app .calculator-panel,
.energy-app .result-panel {
  padding: 25px;
}

.energy-app .calculator-panel {
  border-right: 1px solid var(--app-line);
}

.energy-app h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.48rem);
  line-height: 1.4;
}

.energy-app h3 {
  margin: 0;
  font-size: 1rem;
}

.energy-app .section-heading {
  margin-bottom: 18px;
}

.energy-app .energy-input-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  gap: 14px;
}

.energy-app .field-group {
  min-width: 0;
}

.energy-app .field-group label,
.energy-app .efficiency-fieldset legend {
  display: block;
  margin-bottom: 7px;
  font-size: .86rem;
  font-weight: 760;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.energy-app .field-group input,
.energy-app .field-group select {
  width: 100%;
  min-width: 0;
  min-height: 46px;
  border: 1px solid var(--app-line-strong);
  border-radius: 0;
  padding: 9px 10px;
  color: var(--app-ink);
  background: #fff;
}

.energy-app .field-group input:focus,
.energy-app .field-group select:focus {
  border-color: var(--app-accent);
  outline: 3px solid var(--app-accent-soft);
  outline-offset: 0;
}

.energy-app .field-group input[aria-invalid="true"] {
  border-color: var(--app-danger);
  background: #fff8f8;
}

.energy-app .input-with-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(112px, .72fr);
  align-items: stretch;
  min-width: 0;
}

.energy-app .input-with-unit.compact-unit {
  grid-template-columns: minmax(0, 1fr) 42px;
}

.energy-app .input-with-unit input {
  border-right: 0;
}

.energy-app .unit-suffix {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--app-line-strong);
  padding: 7px;
  background: #f0f2ed;
  color: var(--app-muted);
  font-size: .75rem;
  font-weight: 720;
  line-height: 1.35;
  overflow-wrap: anywhere;
  text-align: center;
}

.energy-app .field-help {
  margin: 6px 0 0;
  color: var(--app-muted);
  font-size: .76rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.energy-app .efficiency-fieldset {
  margin: 20px 0 0;
  padding: 0;
  border: 0;
}

.energy-app .efficiency-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.energy-app .efficiency-grid label {
  min-height: 3.9em;
  font-size: .8rem;
}

.energy-app .form-error {
  margin: 17px 0 0;
  padding: 10px 12px;
  border-left: 4px solid var(--app-danger);
  background: var(--app-danger-soft);
  color: #762525;
  font-size: .84rem;
  font-weight: 700;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.energy-app .form-error[hidden] {
  display: none;
}

.energy-app .form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.energy-app .button {
  min-height: 46px;
  border: 1px solid var(--app-accent);
  border-radius: 0;
  padding: 9px 17px;
  cursor: pointer;
  font-weight: 760;
}

.energy-app .button-primary {
  color: #fff;
  background: var(--app-accent);
}

.energy-app .button-primary:hover {
  background: var(--app-accent-strong);
}

.energy-app .button-secondary {
  color: var(--app-accent);
  background: transparent;
}

.energy-app .button-secondary:hover {
  background: var(--app-accent-soft);
}

.energy-app .model-callout {
  margin-top: 22px;
  padding: 16px;
  border-left: 4px solid var(--app-accent);
  background: var(--app-accent-soft);
}

.energy-app .model-callout p {
  margin: 7px 0 0;
  color: #38443e;
  font-size: .85rem;
  line-height: 1.7;
}

.energy-app .result-heading-row,
.energy-app .figure-heading-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.energy-app .status-badge {
  flex: 0 1 auto;
  max-width: 48%;
  border: 1px solid var(--app-line-strong);
  padding: 4px 8px;
  color: var(--app-muted);
  background: #f5f4ef;
  font-size: .72rem;
  font-weight: 760;
  line-height: 1.45;
  overflow-wrap: anywhere;
  text-align: center;
}

.energy-app .status-badge[data-state="ready"] {
  border-color: var(--app-accent);
  color: var(--app-accent);
  background: var(--app-accent-soft);
}

.energy-app .status-badge[data-state="error"] {
  border-color: var(--app-danger);
  color: var(--app-danger);
  background: var(--app-danger-soft);
}

.energy-app .result-status {
  margin: 11px 0 0;
  color: var(--app-muted);
  font-size: .86rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.energy-app .summary-card {
  margin-top: 17px;
  padding: 17px;
  border: 1px solid var(--app-accent);
  border-left-width: 4px;
  background: var(--app-accent-soft);
}

.energy-app .summary-card[data-state="error"] {
  border-color: var(--app-danger);
  background: var(--app-danger-soft);
}

.energy-app .summary-label,
.energy-app .summary-note {
  margin: 0;
}

.energy-app .summary-label {
  color: var(--app-accent);
  font-size: .8rem;
  font-weight: 760;
}

.energy-app .summary-value {
  display: block;
  margin-top: 3px;
  font-size: clamp(1.42rem, 3vw, 2rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.energy-app .summary-note {
  margin-top: 5px;
  color: #3f4c46;
  font-size: .83rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.energy-app .level-metrics,
.energy-app .loss-metrics {
  display: grid;
  margin: 17px 0 0;
  border-top: 1px solid var(--app-line);
  border-left: 1px solid var(--app-line);
}

.energy-app .level-metrics {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.energy-app .loss-metrics {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.energy-app .level-metrics div,
.energy-app .loss-metrics div {
  min-width: 0;
  padding: 10px;
  border-right: 1px solid var(--app-line);
  border-bottom: 1px solid var(--app-line);
}

.energy-app .level-metrics dt,
.energy-app .loss-metrics dt {
  color: var(--app-muted);
  font-size: .73rem;
  font-weight: 730;
  line-height: 1.45;
}

.energy-app .level-metrics dd,
.energy-app .loss-metrics dd {
  margin: 4px 0 0;
  font-size: .82rem;
  font-weight: 740;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.energy-app .loss-section,
.energy-app .calculation-section {
  margin-top: 20px;
  padding-top: 17px;
  border-top: 1px solid var(--app-line);
}

.energy-app .loss-section .loss-metrics {
  margin-top: 11px;
}

.energy-app .calculation-steps {
  margin: 11px 0 0;
  padding: 0;
  list-style: none;
}

.energy-app .calculation-steps li {
  display: grid;
  grid-template-columns: minmax(108px, .7fr) minmax(0, 1.3fr);
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid #e0e4e1;
}

.energy-app .calculation-steps li:last-child {
  border-bottom: 0;
}

.energy-app .calculation-steps span {
  color: var(--app-muted);
  font-size: .78rem;
}

.energy-app .calculation-steps code {
  color: var(--app-ink);
  font: 600 .79rem/1.55 ui-monospace, SFMono-Regular, Consolas, monospace;
  overflow-wrap: anywhere;
  white-space: normal;
}

.energy-app .pyramid-figure {
  margin: 22px 0 0;
  padding: 17px;
  border: 1px solid var(--app-line);
  background: #f0f2ed;
}

.energy-app .figure-unit {
  max-width: 55%;
  color: var(--app-accent);
  font-size: .73rem;
  font-weight: 740;
  line-height: 1.45;
  overflow-wrap: anywhere;
  text-align: right;
}

.energy-app .pyramid-frame {
  display: grid;
  place-items: center;
  margin-top: 12px;
  overflow: hidden;
  border: 1px solid var(--app-line-strong);
  background: #fffefa;
}

.energy-app #energy-pyramid {
  display: block;
  width: min(100%, 520px);
  height: auto;
  color: var(--app-ink);
  font-family: inherit;
}

.energy-app .svg-waiting {
  fill: var(--app-muted);
  font-size: 13px;
}

.energy-app .tier-shape {
  stroke: #36433c;
  stroke-width: 1;
}

.energy-app .tier-0 { fill: #d9e6dc; }
.energy-app .tier-1 { fill: #c6d9c5; }
.energy-app .tier-2 { fill: #e3d5af; }
.energy-app .tier-3 { fill: #e0c1ae; }

.energy-app .tier-label {
  fill: #1d2822;
  font-size: 11px;
  font-weight: 760;
  text-anchor: middle;
}

.energy-app .tier-value {
  fill: #34443b;
  font-size: 9px;
  font-weight: 650;
  text-anchor: middle;
}

.energy-app .transfer-arrow {
  stroke: var(--app-accent);
  stroke-width: 2;
}

.energy-app .transfer-label,
.energy-app .loss-label {
  fill: #4b5b52;
  font-size: 9px;
  font-weight: 650;
}

.energy-app .transfer-label { text-anchor: start; }
.energy-app .loss-label { text-anchor: end; }

.energy-app .bar-label {
  fill: #2e3a33;
  font-size: 10px;
  font-weight: 720;
}

.energy-app .bar-track {
  fill: #e3e7e2;
  stroke: #b8c0ba;
  stroke-width: 1;
}

.energy-app .bar-fill {
  stroke: #32433a;
  stroke-width: .8;
}

.energy-app .bar-fill.is-minimum {
  stroke-dasharray: 2 1;
}

.energy-app .bar-value {
  fill: #526159;
  font-size: 8.5px;
  font-variant-numeric: tabular-nums;
}

.energy-app .pyramid-figure figcaption {
  margin-top: 11px;
  color: var(--app-muted);
  font-size: .76rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.energy-app .content-section {
  margin-top: 46px;
}

.energy-app .formula-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 16px;
  border-top: 1px solid var(--app-line);
  border-left: 1px solid var(--app-line);
}

.energy-app .formula-list article {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 15px;
  border-right: 1px solid var(--app-line);
  border-bottom: 1px solid var(--app-line);
}

.energy-app .formula-list strong {
  font-size: .9rem;
  overflow-wrap: anywhere;
}

.energy-app .formula-list span {
  color: var(--app-muted);
  font-size: .81rem;
  line-height: 1.6;
}

.energy-app .proof-guide {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--app-line);
  background: var(--app-surface);
}

.energy-app .proof-guide ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 24px;
  margin: 10px 0 0;
  padding-left: 1.25em;
}

.energy-app .proof-guide li {
  color: var(--app-muted);
  font-size: .84rem;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

.energy-app .footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}

@media (max-width: 980px) {
  .energy-app .tool-shell {
    grid-template-columns: 1fr;
  }

  .energy-app .calculator-panel {
    border-right: 0;
    border-bottom: 1px solid var(--app-line);
  }

  .energy-app .formula-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .energy-app .energy-input-grid,
  .energy-app .efficiency-grid {
    grid-template-columns: 1fr;
  }

  .energy-app .efficiency-grid label {
    min-height: 0;
  }

  .energy-app .proof-guide ul {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .energy-app .calculator-panel,
  .energy-app .result-panel {
    padding: 19px 14px;
  }

  .energy-app .input-with-unit {
    grid-template-columns: minmax(0, 1fr) 102px;
  }

  .energy-app .input-with-unit.compact-unit {
    grid-template-columns: minmax(0, 1fr) 42px;
  }

  .energy-app .form-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .energy-app .button {
    width: 100%;
  }

  .energy-app .level-metrics,
  .energy-app .loss-metrics,
  .energy-app .formula-list {
    grid-template-columns: 1fr;
  }

  .energy-app .calculation-steps li {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .energy-app .pyramid-figure {
    padding: 14px 8px;
  }

  .energy-app .result-heading-row,
  .energy-app .figure-heading-row {
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .energy-app *,
  .energy-app *::before,
  .energy-app *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}