:root {
  --n-ink: #181f27;
  --n-muted: #5d6770;
  --n-paper: #f7f5ef;
  --n-panel: #fffefa;
  --n-line: #d2d2c9;
  --n-sun: #eda43c;
  --n-sun-soft: #ffefcc;
  --n-teal: #1d817e;
  --n-teal-soft: #daf1eb;
  --n-held: #576974;
  --n-empty: #e6e6dc;
  --n-shadow: #181f271f;
}

.theme-dark {
  --n-ink: #f1efe6;
  --n-muted: #b3b9b7;
  --n-paper: #181c1f;
  --n-panel: #202628;
  --n-line: #4c5655;
  --n-sun: #f4b145;
  --n-sun-soft: #503b1d;
  --n-teal: #5cd1bc;
  --n-teal-soft: #1c4643;
  --n-held: #99abb1;
  --n-empty: #404949;
  --n-shadow: #0005;
}

.evc-tool {
  --n-ink: #181f27;
  --n-muted: #5d6770;
  --n-paper: #f7f5ef;
  --n-panel: #fffefa;
  --n-line: #d2d2c9;
  --n-sun: #eda43c;
  --n-sun-soft: #ffefcc;
  --n-teal: #1d817e;
  --n-teal-soft: #daf1eb;
  --n-held: #576974;
  --n-empty: #e6e6dc;
  --n-shadow: #181f271f;

  background: var(--n-paper);
  border: 1px solid var(--n-line);
  border-radius: 1.5rem;
  box-sizing: border-box;
  color: var(--n-ink);
  overflow: hidden;
  width: 100%;
  max-width: calc(100vw - 2rem);
}

.theme-dark .evc-tool {
  --n-ink: #f1efe6;
  --n-muted: #b3b9b7;
  --n-paper: #181c1f;
  --n-panel: #202628;
  --n-line: #4c5655;
  --n-sun: #f4b145;
  --n-sun-soft: #503b1d;
  --n-teal: #5cd1bc;
  --n-teal-soft: #1c4643;
  --n-held: #99abb1;
  --n-empty: #404949;
  --n-shadow: #0005;
}

.evc-surface {
  background: var(--n-panel);
  padding: clamp(1.1rem, 3vw, 2rem);
}

.evc-header,
.evc-scenes,
.evc-runway-heading,
.evc-battery-legend,
.evc-result-lead,
.evc-formula {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

.evc-header {
  border-bottom: 1px solid var(--n-line);
  padding-bottom: 1.25rem;
}

.evc-header-copy {
  max-width: 42rem;
}

.evc-overline {
  color: var(--n-teal);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  margin: 0 0 0.45rem;
  text-transform: uppercase;
}

.evc-intro {
  color: var(--n-muted);
  line-height: 1.5;
  margin: 0;
}

.evc-reset,
.evc-scene-button {
  background: var(--n-paper);
  border: 1px solid var(--n-line);
  color: var(--n-ink);
  cursor: pointer;
  font: inherit;
}

.evc-reset {
  border-radius: 999px;
  flex: 0 0 auto;
  font-size: 0.8rem;
  font-weight: 750;
  padding: 0.65rem 0.9rem;
}

.evc-reset:hover,
.evc-reset:focus-visible {
  border-color: var(--n-teal);
}

.evc-scenes {
  align-items: stretch;
  border-bottom: 1px solid var(--n-line);
  flex-wrap: wrap;
  padding: 1.25rem 0;
}

.evc-scenes-label {
  color: var(--n-muted);
  flex: 1 0 100%;
  font-size: 0.78rem;
  font-weight: 750;
  margin-bottom: 0.1rem;
}

.evc-scene-button {
  border-radius: 0.85rem;
  display: flex;
  flex: 1 1 10rem;
  flex-direction: column;
  gap: 0.25rem;
  min-height: 4.5rem;
  padding: 0.8rem 0.9rem;
  text-align: left;
}

.evc-scene-button strong {
  font-size: 0.9rem;
}

.evc-scene-button small {
  color: var(--n-muted);
  font-size: 0.72rem;
}

.evc-scene-button:hover,
.evc-scene-button:focus-visible,
.evc-scene-button.is-active {
  border-color: var(--n-sun);
}

.evc-scene-button.is-active {
  background: var(--n-sun-soft);
  box-shadow: inset 0 -0.2rem 0 var(--n-sun);
}

.evc-main-grid {
  align-items: start;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: minmax(16rem, 0.9fr) minmax(20rem, 1.1fr);
  padding-top: 1.75rem;
}

.evc-section-heading h2,
.evc-runway-heading h2 {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.2;
  margin: 0;
}

.evc-soc-row {
  align-items: center;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  margin: 1.5rem 0;
}

.evc-window-arrow {
  color: var(--n-sun);
  font-size: 1.6rem;
  font-weight: 800;
}

.evc-field {
  display: block;
  min-width: 0;
}

.evc-field > span {
  display: block;
  font-size: 0.86rem;
  font-weight: 750;
}

.evc-field > small {
  color: var(--n-muted);
  display: block;
  font-size: 0.7rem;
  line-height: 1.35;
  margin: 0.25rem 0 0.55rem;
  min-height: 1.9em;
}

.evc-field strong {
  align-items: center;
  background: var(--n-paper);
  border: 1px solid var(--n-line);
  border-radius: 0.7rem;
  display: flex;
  min-height: 2.9rem;
  padding: 0 0.7rem;
}

.evc-field input[type='number'],
.evc-field input[type='text'] {
  background: transparent;
  border: 0;
  color: var(--n-ink);
  font: 700 1.05rem ui-monospace, monospace;
  min-width: 0;
  outline: 0;
  padding: 0.45rem 0;
  width: 100%;
}

.evc-field em {
  color: var(--n-muted);
  flex: 0 0 auto;
  font-size: 0.72rem;
  font-style: normal;
  margin-left: 0.45rem;
  white-space: nowrap;
}

.evc-field strong:focus-within {
  border-color: var(--n-teal);
  box-shadow: 0 0 0 3px var(--n-teal-soft);
}

.evc-field input[type='range'] {
  accent-color: var(--n-teal);
  display: block;
  margin: 0.75rem 0 0;
  width: 100%;
}

.evc-field-stack {
  display: grid;
  gap: 1.05rem;
}

.evc-currency-panel {
  background: var(--n-teal-soft);
  border: 1px solid var(--n-teal);
  border-radius: 0.85rem;
  display: grid;
  gap: 0.65rem;
  margin: 1.25rem 0 1.05rem;
  padding: 0.8rem;
  position: relative;
}

.evc-currency-panel > div:first-child span,
.evc-currency-panel > div:first-child small {
  display: block;
}

.evc-currency-panel > div:first-child span {
  color: var(--n-ink);
  font-size: 0.84rem;
  font-weight: 800;
}

.evc-currency-panel > div:first-child small,
.evc-currency-factor {
  color: var(--n-muted);
  font-size: 0.7rem;
  line-height: 1.35;
  margin-top: 0.2rem;
}

.evc-currency-trigger {
  align-items: center;
  background: var(--n-paper);
  border: 1px solid var(--n-line);
  border-radius: 0.65rem;
  color: var(--n-ink);
  cursor: pointer;
  display: flex;
  gap: 0.65rem;
  justify-content: space-between;
  padding: 0.65rem 0.75rem;
  text-align: left;
  width: 100%;
}

.evc-currency-trigger strong {
  font-size: 0.9rem;
}

.evc-currency-trigger span {
  color: var(--n-muted);
  flex: 1;
  font-size: 0.72rem;
}

.evc-currency-trigger i {
  border-bottom: 2px solid var(--n-ink);
  border-right: 2px solid var(--n-ink);
  display: block;
  height: 0.45rem;
  transform: rotate(45deg) translateY(-0.15rem);
  width: 0.45rem;
}

.evc-currency-menu {
  background: var(--n-panel);
  border: 1px solid var(--n-line);
  border-radius: 0.7rem;
  box-shadow: 0 0.8rem 1.5rem var(--n-shadow);
  display: grid;
  gap: 0.25rem;
  left: 0.8rem;
  max-height: 16rem;
  overflow-y: auto;
  padding: 0.35rem;
  position: absolute;
  right: 0.8rem;
  top: calc(100% - 0.35rem);
  z-index: 2;
}

.evc-currency-menu[hidden] {
  display: none;
}

.evc-currency-menu button {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 0.45rem;
  color: var(--n-ink);
  cursor: pointer;
  display: flex;
  gap: 0.7rem;
  justify-content: space-between;
  padding: 0.55rem 0.6rem;
  text-align: left;
}

.evc-currency-menu button:hover,
.evc-currency-menu button:focus-visible,
.evc-currency-menu button.is-active {
  background: var(--n-sun-soft);
}

.evc-currency-menu button strong {
  font-size: 0.78rem;
}

.evc-currency-menu button span {
  color: var(--n-muted);
  font-size: 0.7rem;
}

.evc-runway {
  background: var(--n-paper);
  border: 1px solid var(--n-line);
  border-radius: 1rem;
  box-shadow: 0 1rem 2rem var(--n-shadow);
  min-width: 0;
  padding: clamp(1rem, 3vw, 1.5rem);
}

.evc-runway-heading {
  align-items: flex-start;
}

.evc-status {
  background: var(--n-teal-soft);
  border-radius: 999px;
  color: var(--n-teal);
  flex: 0 0 auto;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.45rem 0.65rem;
}

.evc-tool[data-status='empty'] .evc-status {
  background: var(--n-empty);
  color: var(--n-muted);
}

.evc-tool[data-status='short'] .evc-status {
  background: var(--n-sun-soft);
  color: var(--n-ink);
}

.evc-battery-wrap {
  margin: 1.25rem -0.6rem 0.5rem;
}

.evc-battery {
  display: block;
  height: auto;
  overflow: visible;
  width: 100%;
}

.evc-battery-shell {
  fill: var(--n-panel);
  stroke: var(--n-line);
  stroke-width: 3;
}

.evc-battery-terminal {
  fill: var(--n-line);
}

.evc-segments rect {
  fill: var(--n-empty);
  transition: fill 180ms ease, transform 180ms ease;
}

.evc-segments rect[data-level='held'] {
  fill: var(--n-held);
}

.evc-segments rect[data-level='added'] {
  fill: var(--n-sun);
  transform: translateY(-4px);
}

.evc-energy-line {
  fill: none;
  stroke: var(--n-teal);
  stroke-dasharray: 5 9;
  stroke-width: 3;
}

.evc-energy-node {
  fill: var(--n-teal);
}

.evc-battery-legend {
  color: var(--n-muted);
  font-size: 0.72rem;
  justify-content: flex-start;
  padding: 0 0.65rem;
}

.evc-battery-legend > span {
  align-items: center;
  display: inline-flex;
  gap: 0.3rem;
}

.evc-battery-legend strong {
  color: var(--n-ink);
}

.evc-dot {
  border-radius: 50%;
  display: inline-block;
  height: 0.6rem;
  width: 0.6rem;
}

.evc-dot-held {
  background: var(--n-held);
}

.evc-dot-added {
  background: var(--n-sun);
}

.evc-result-lead {
  align-items: flex-end;
  border-top: 1px solid var(--n-line);
  margin-top: 1.25rem;
  padding-top: 1rem;
}

.evc-result-lead span,
.evc-metrics span {
  color: var(--n-muted);
  display: block;
  font-size: 0.72rem;
}

.evc-result-lead strong {
  display: block;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  line-height: 1;
  margin-top: 0.25rem;
}

.evc-result-lead small {
  color: var(--n-teal);
  font-size: 0.75rem;
  font-weight: 800;
}

.evc-metrics {
  border-bottom: 1px solid var(--n-line);
  display: grid;
  gap: 0.9rem 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 1.15rem 0;
}

.evc-metrics strong {
  display: block;
  font-size: 0.98rem;
  margin-top: 0.2rem;
}

.evc-summary {
  color: var(--n-muted);
  font-size: 0.82rem;
  line-height: 1.55;
  margin: 1rem 0 0;
}

.evc-formula {
  align-items: flex-start;
  border-top: 1px solid var(--n-line);
  color: var(--n-muted);
  font-size: 0.76rem;
  line-height: 1.5;
  margin-top: 1.75rem;
  padding-top: 1rem;
}

.evc-formula strong {
  color: var(--n-ink);
  flex: 0 0 auto;
}

.evc-formula span {
  max-width: 56rem;
}

.evc-reset:focus-visible,
.evc-scene-button:focus-visible,
.evc-currency-trigger:focus-visible,
.evc-currency-menu button:focus-visible,
.evc-field input:focus-visible {
  outline: 3px solid var(--n-sun);
  outline-offset: 2px;
}

@media (max-width: 760px) {
  .evc-main-grid {
    grid-template-columns: 1fr;
  }

  .evc-runway {
    order: -1;
  }
}

@media (max-width: 520px) {
  .evc-header,
  .evc-formula {
    align-items: flex-start;
    flex-direction: column;
  }

  .evc-battery-legend {
    align-items: flex-start;
    flex-direction: column;
  }
}