:root {
  font-family: var(--mono-font);
  color: var(--mono-text);
  background: var(--mono-bg);
  font-synthesis: none;
  color-scheme: dark;
  --muted: var(--mono-muted);
  --purple: var(--mono-accent-text);
  --line: var(--mono-border);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 28px;
}
body {
  margin: 0;
  min-width: 320px;
}
button,
input,
select {
  font: inherit;
}
button,
a,
input,
select {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--mono-focus);
  outline-offset: 4px;
}
.ambient {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  background: var(--mono-surface);
}
main {
  max-width: 1160px;
  padding: 0 40px;
  margin: auto;
}
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 18px;
  font-weight: bold;
  letter-spacing: -0.5px;
}
.brand svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: var(--purple);
  stroke-width: 1.5;
}
.quiet-link {
  font-size: 13px;
  text-decoration: none;
  color: var(--muted);
}
.quiet-link span {
  margin-left: 8px;
  color: var(--purple);
}
.intro {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  padding: 53px 0 36px;
}
.intro h1 {
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -2.8px;
  margin: 0;
}
.intro p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 3px;
}
.glass {
  background: var(--mono-surface);
  border: 1px solid var(--line);
  box-shadow: none;
  backdrop-filter: none;
  border-radius: var(--mono-radius-lg);
}
.calculator {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 20px;
}
.inputs {
  padding: 28px 26px 0;
  overflow: hidden;
}
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
h2 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin: 0;
}
.section-note {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
  margin: 8px 0 22px;
}
.text-button {
  border: 0;
  background: none;
  color: var(--muted);
  padding: 4px 0;
  font-size: 12px;
}
.text-button:hover {
  color: var(--mono-text);
}
label {
  display: block;
  font-size: 12px;
  margin: 0 0 9px;
  color: var(--mono-muted);
}
.input-group {
  display: flex;
  min-width: 0;
  align-items: stretch;
  background: var(--mono-inset);
  border: 1px solid var(--mono-control-border);
  border-radius: var(--mono-radius-lg);
  transition: border-color 0.15s;
}
.input-group:focus-within {
  border-color: var(--mono-control-border);
  box-shadow: none;
}
.input-group:has([aria-invalid="true"]) {
  border-color: var(--mono-control-border);
}
input {
  width: 100%;
  min-width: 0;
  background: transparent;
  border: 0;
  color: var(--mono-text);
  padding: 13px 15px;
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  outline: none;
}
input:focus-visible {
  outline: none;
}
select {
  max-width: 108px;
  background: var(--mono-inset);
  border: 0;
  border-left: 1px solid var(--line);
  border-radius: 0 8px 8px 0;
  padding: 0 10px;
  color: var(--mono-text);
  font-size: 12px;
}
.field-note {
  min-height: 18px;
  font-size: 11px;
  color: var(--muted);
  margin: 8px 0 21px;
  line-height: 1.6;
}
.error {
  font-size: 12px;
  color: var(--mono-danger);
  line-height: 1.6;
  margin: 0;
}
.error:empty {
  display: none;
}
.inputs .error:not(:empty) {
  margin-bottom: 16px;
}
.input-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
  margin: 4px -26px 0;
  padding: 15px 26px;
  border-top: 1px solid var(--line);
  background: var(--mono-inset);
}
.live-dot {
  width: 5px;
  height: 5px;
  border-radius: 100%;
  background: var(--mono-accent);
  box-shadow: none;
}
.result {
  padding: 28px 28px 19px;
  position: relative;
  overflow: hidden;
  background: var(--mono-surface);
}
.result:before {
  content: "";
  position: absolute;
  top: 0;
  left: 12%;
  right: 12%;
  height: 1px;
  background: var(--mono-surface);
  box-shadow: none;
}
.estimate-tag {
  font-size: 10px;
  color: var(--mono-muted);
  border: 1px solid var(--mono-border);
  background: var(--mono-surface);
  border-radius: var(--mono-radius-lg);
  padding: 6px 9px;
  white-space: nowrap;
}
.result-layout {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 240px;
  gap: 10px;
  margin-top: 25px;
}
.target-input {
  max-width: 210px;
}
.target-input input {
  font-size: 20px;
  padding: 10px 12px;
}
.result .field-note {
  margin-bottom: 15px;
}
.primary-result {
  display: flex;
  align-items: baseline;
  gap: 9px;
}
.primary-result > span:first-child {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 500;
  letter-spacing: -3px;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  overflow-wrap: anywhere;
}
.result-unit {
  font-size: 22px;
  color: var(--mono-muted);
}
.secondary-result {
  font-size: 17px;
  color: var(--mono-muted);
  margin: 7px 0 0;
}
.capacity-change {
  display: inline-block;
  font-size: 11px;
  color: var(--mono-text);
  margin: 18px 0 0;
  padding: 7px 10px;
  background: var(--mono-surface);
  border: 1px solid var(--mono-border);
  border-radius: var(--mono-radius-md);
}
.capacity-change:empty {
  display: none;
}
.spool-scene {
  align-self: center;
  min-width: 0;
  text-align: center;
}
.spool {
  width: 100%;
  filter: none;
}
.spool-shadow {
  fill: var(--mono-accent);
  opacity: 0.1;
  filter: none;
}
.spool-caption {
  color: var(--mono-text);
  font-size: 9px;
  white-space: nowrap;
}
.comparison {
  margin-top: 26px;
  overflow: hidden;
}
.comparison-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 28px 19px;
}
.comparison-header .section-note {
  margin: 7px 0 0;
}
.table-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.segmented {
  display: flex;
  background: var(--mono-surface);
  border: 1px solid var(--line);
  border-radius: var(--mono-radius-md);
  padding: 3px;
}
.segmented button {
  font-size: 11px;
  padding: 9px 12px;
  border-radius: var(--mono-radius-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
}
.segmented button[aria-pressed="true"] {
  background: var(--mono-surface);
  border-color: var(--mono-control-border);
  color: var(--mono-text);
  box-shadow: none;
}
.export-button {
  font-size: 11px;
  padding: 9px 0;
  border: 0;
  background: transparent;
  color: var(--mono-text);
}
.export-button span {
  margin-left: 6px;
  color: var(--purple);
}
button:disabled {
  opacity: 0.4;
  cursor: default;
}
.table-scroll {
  max-height: 490px;
  overflow: auto;
  scrollbar-color: var(--mono-border) var(--mono-border);
  scrollbar-width: thin;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
thead {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--mono-inset);
}
th {
  text-align: left;
  color: var(--mono-text);
  font-size: 11px;
  font-weight: 400;
  padding: 13px 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
td {
  padding: 13px 28px;
  font-size: 13px;
  border-bottom: 1px solid var(--mono-border);
}
.numeric {
  text-align: right;
}
td:nth-child(2) {
  color: var(--muted);
  font-size: 12px;
}
tbody tr:hover {
  background: var(--mono-bg);
}
tbody tr.selected {
  background: var(--mono-selection);
}
tbody tr.selected td:first-child {
  box-shadow: none;
}
.size-button {
  font-size: 13px;
  border: 0;
  background: none;
  color: var(--mono-text);
  padding: 3px 0;
  min-width: 52px;
  text-align: left;
}
.size-button:hover {
  color: var(--mono-text);
}
.numeric.metres {
  color: var(--mono-text);
}
.row-bar {
  width: 100%;
  height: 3px;
  background: var(--mono-surface);
  border-radius: var(--mono-radius-sm);
  min-width: 70px;
}
.row-bar span {
  display: block;
  height: 100%;
  background: var(--mono-surface);
  border-radius: var(--mono-radius-sm);
  box-shadow: none;
}
.bar-heading {
  width: 24%;
}
.table-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 28px;
  color: var(--muted);
  font-size: 10px;
  border-top: 1px solid var(--line);
}
.method {
  padding: 39px 0;
}
.method h2 {
  font-size: 15px;
  color: var(--mono-text);
}
.method-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 55px;
  margin-top: 8px;
}
.method p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.9;
  max-width: 75ch;
}
.method a {
  color: var(--mono-text);
  text-underline-offset: 3px;
}
.method .formula {
  font-size: 11px;
  color: var(--mono-text);
  line-height: 1.8;
  background: var(--mono-surface);
  border-left: 2px solid var(--mono-border);
  padding: 10px 13px;
}
.page-footer {
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0 28px;
  font-size: 10px;
  color: var(--mono-muted);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
@media (min-width: 1100px) {
  .result-layout {
    grid-template-columns: minmax(180px, 1fr) 260px;
  }
  .spool {
    margin-top: -12px;
  }
}
@media (max-width: 1000px) {
  main {
    padding: 0 26px;
  }
  .calculator {
    grid-template-columns: 310px 1fr;
  }
  .result-layout {
    grid-template-columns: 1fr 155px;
  }
  .result {
    padding: 26px 22px;
  }
  .estimate-tag {
    display: none;
  }
  .spool-caption {
    white-space: normal;
    line-height: 1.8;
    display: block;
  }
  .comparison-header {
    align-items: flex-start;
  }
  .table-actions {
    gap: 8px;
    flex-direction: column;
    align-items: flex-end;
  }
  th,
  td {
    padding-left: 20px;
    padding-right: 20px;
  }
  .bar-heading {
    width: 18%;
  }
}
@media (max-width: 740px) {
  main {
    padding: 0 20px;
  }
  .page-header {
    padding: 22px 0;
  }
  .intro {
    display: block;
    padding: 36px 0 26px;
  }
  .intro h1 {
    font-size: 46px;
    letter-spacing: -2px;
  }
  .intro p {
    margin: 18px 0 0;
    font-size: 13px;
  }
  .calculator {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .inputs {
    padding: 24px 24px 0;
  }
  .input-footer {
    margin-left: -24px;
    margin-right: -24px;
    padding-left: 24px;
  }
  .result {
    padding: 24px;
  }
  .result-layout {
    grid-template-columns: 1fr 42%;
    margin-top: 24px;
    gap: 8px;
  }
  .primary-result > span:first-child {
    font-size: 60px;
  }
  .estimate-tag {
    display: block;
  }
  .comparison-header {
    padding: 22px 20px;
    display: block;
  }
  .table-actions {
    margin-top: 18px;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .comparison-header .section-note {
    font-size: 11px;
  }
  th,
  td {
    padding: 13px 16px;
  }
  .bar-heading,
  td:last-child {
    display: none;
  }
  .table-scroll {
    max-height: 430px;
  }
  .table-footer {
    padding: 14px 16px;
    font-size: 9px;
  }
  .method-columns {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .method {
    padding: 32px 0 25px;
  }
  .method p {
    font-size: 11px;
  }
  .method h2 {
    font-size: 15px;
  }
  .method-columns .formula {
    font-size: 10px;
  }
  .quiet-link {
    font-size: 11px;
  }
  .brand {
    font-size: 16px;
  }
  .brand svg {
    width: 29px;
  }
  .capacity-change {
    font-size: 10px;
  }
  .result-content {
    min-width: 0;
  }
}
@media (max-width: 390px) {
  main {
    padding: 0 14px;
  }
  .result {
    padding: 22px 18px;
  }
  .intro h1 {
    font-size: 41px;
  }
  .primary-result > span:first-child {
    font-size: 48px;
  }
  .result-layout {
    grid-template-columns: 1fr 36%;
  }
  .estimate-tag {
    font-size: 8px;
    padding: 5px 6px;
  }
  .section-heading h2 {
    font-size: 15px;
  }
  th,
  td {
    padding: 12px;
  }
  .page-footer {
    font-size: 9px;
  }
  .table-footer {
    flex-direction: column;
    gap: 6px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *:before,
  *:after {
    transition: none !important;
  }
}

.ambient {
  display: none;
}
.glass {
  box-shadow: none;
  background: var(--mono-surface);
  border: 1px solid var(--mono-border);
}
.spool-scene {
  opacity: 0.65;
}