:root {
  --desk: #ddd6c8;
  --ink: #16140f;
  --mute: #6a655b;
  --rule: #c4bbaa;
  --paper: #fffdf8;
  --sans: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--ink);
  background: var(--desk);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.4;
}

.app {
  position: relative;
  display: grid;
  grid-template-columns: 23.5rem minmax(0, 1fr);
  gap: 1.75rem;
  max-width: 1360px;
  margin: 0 auto;
  padding: 1.35rem 1.5rem 2rem;
}

header {
  grid-column: 1 / -1;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--ink);
}

.brand {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.brand span {
  color: var(--mute);
}

header p {
  margin: 0;
  color: var(--mute);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  min-width: 0;
}

form {
  display: grid;
  gap: 0.7rem;
}

.field {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 0.45rem 0.6rem;
  padding: 0.55rem 0.15rem 0.45rem;
  border-bottom: 1px solid var(--rule);
}

.field:focus-within {
  border-bottom-color: var(--ink);
}

.field label {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}

.field input {
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1.55rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.field input:focus {
  outline: none;
}

.field input::-webkit-outer-spin-button,
.field input::-webkit-inner-spin-button {
  appearance: none;
  margin: 0;
}

.field input[type="number"] {
  appearance: textfield;
}

.unit {
  padding-bottom: 0.2rem;
  color: var(--mute);
  font-family: var(--mono);
  font-size: 0.78rem;
}

fieldset {
  margin: 0.25rem 0 0;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 0.55rem;
  border: 1px solid var(--ink);
}

.segmented label {
  display: flex;
  justify-content: center;
  padding: 0.48rem 0.3rem;
  border-right: 1px solid var(--ink);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.segmented label:last-child {
  border-right: 0;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented input:focus-visible + span {
  outline: 1px solid var(--ink);
  outline-offset: 2px;
}

.segmented label:has(input:checked) {
  background: var(--ink);
  color: var(--paper);
}

.note {
  margin: 0;
  color: var(--mute);
  font-size: 0.78rem;
  line-height: 1.45;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

button {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 0.7rem 0.6rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--ink);
}

button:hover:not(:disabled) {
  background: #2a261e;
  color: var(--paper);
}

button.secondary:hover:not(:disabled) {
  background: var(--ink);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

#status {
  min-height: 1.2em;
  margin: 0;
  color: #7a2e18;
  font-size: 0.82rem;
}

#results h2 {
  margin: 0 0 0.2rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.lede {
  margin: 0 0 0.7rem;
  color: var(--mute);
  font-size: 0.8rem;
}

#results dl {
  margin: 0;
  border-top: 1px solid var(--rule);
}

.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  padding: 0.38rem 0;
  border-bottom: 1px solid var(--rule);
}

.row dt {
  color: var(--mute);
  font-size: 0.8rem;
}

.row dt span {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.86rem;
  text-align: right;
  white-space: nowrap;
}

.canvas {
  min-width: 0;
  display: flex;
  align-items: flex-start;
}

#stage {
  width: min(100%, calc((100vh - 6.5rem) * 420 / 297));
  margin-left: auto;
  box-shadow: 0 1px 0 rgba(22, 20, 15, 0.05);
}

#stage svg {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
  background: var(--paper);
}

@media (max-width: 880px) {
  .app {
    grid-template-columns: 1fr;
    padding: 1rem 1rem 2rem;
  }

  #stage {
    width: 100%;
    margin: 0;
  }
}

@media print {
  body {
    background: #fff;
  }

  header,
  .panel {
    display: none;
  }

  .app {
    display: block;
    max-width: none;
    padding: 0;
  }

  #stage {
    width: 100%;
    box-shadow: none;
  }
}