:root {
  --bg: #efe9dc;
  --card: #faf7f0;
  --ink: #17140f;
  --muted: #6c6556;
  --line: #d9d1bf;
  --cell: #e9e2d0;
  --grid: rgba(23, 20, 15, .05);
  --edge: #17140f;
  --shadow: #cfc6b0;
  --ok: #1f7a5a;
  --bad: #d4401f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1114;
    --card: #171a1f;
    --ink: #ece7da;
    --muted: #8d8878;
    --line: #2a2e35;
    --cell: #20242b;
    --grid: rgba(236, 231, 218, .04);
    --edge: #3a3f48;
    --shadow: #08090b;
    --ok: #4fc89a;
    --bad: #ff6a47;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  font: 400 14px/1.5 "DM Mono", ui-monospace, monospace;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 56px 20px 48px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.back,
.repo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--edge);
  border-radius: 2px;
  padding: 6px 12px;
}

.repo svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.back:hover,
.repo:hover {
  background: var(--ink);
  color: var(--card);
}

.eyebrow,
.label {
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

h1 {
  font: 400 clamp(3rem, 9vw, 5.5rem)/.95 "Instrument Serif", serif;
  margin: 14px 0 16px;
  letter-spacing: -.02em;
}

h1 em {
  color: var(--bad);
}

.lede {
  font: 400 1.35rem/1.35 "Instrument Serif", serif;
  color: var(--muted);
  max-width: 34em;
  margin: 0 0 40px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.wide {
  grid-column: 1 / -1;
}

.card {
  background: var(--card);
  border: 1.5px solid var(--edge);
  border-radius: 2px;
  padding: 24px;
  box-shadow: 6px 6px 0 var(--shadow);
  transition: border-color .3s, box-shadow .3s;
}

.card .label:first-child {
  margin-bottom: 20px;
}

.hour-val {
  color: var(--ink);
  font-weight: 500;
  margin-left: 10px;
}

.hint {
  color: var(--muted);
  margin: 0 0 12px;
  font-size: .8rem;
}

.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}

.group {
  margin: 0 0 8px;
}

.preset {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font: 500 .75rem "DM Mono", monospace;
  text-align: left;
  background: none;
  color: var(--ink);
  border: 1px solid var(--edge);
  border-radius: 2px;
  padding: 8px 10px;
  cursor: pointer;
}

.preset small {
  font-weight: 400;
  color: var(--muted);
}

.preset:hover,
.preset.active {
  background: var(--ink);
  color: var(--card);
}

.preset:hover small,
.preset.active small {
  color: inherit;
  opacity: .75;
}

:focus-visible {
  outline: 2px solid var(--bad);
  outline-offset: 2px;
}

.field {
  margin-bottom: 18px;
}

label {
  display: block;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

input[type=number] {
  width: 100%;
  font: 500 1.6rem "DM Mono", monospace;
  color: var(--ink);
  background: none;
  border: 0;
  border-bottom: 1.5px solid var(--edge);
  border-radius: 0;
  padding: 4px 0 6px;
}

input[type=number]:focus {
  outline: none;
  border-bottom-color: var(--bad);
}

.ratio {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

#ratio {
  font-weight: 500;
  font-size: 1.1rem;
}

.verdict[data-state=ok] {
  border-color: var(--ok);
  box-shadow: 6px 6px 0 var(--ok);
}

.verdict[data-state=bad] {
  border-color: var(--bad);
  box-shadow: 6px 6px 0 var(--bad);
}

.gauge {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  overflow: visible;
}

.zone {
  fill: none;
  stroke-width: 14;
}

.zone-ok {
  stroke: var(--ok);
  opacity: .35;
}

.zone-bad {
  stroke: var(--bad);
  opacity: .85;
}

.tick {
  stroke: var(--ink);
  stroke-width: 2;
}

.needle {
  transform-box: view-box;
  transform-origin: 120px 120px;
  transition: transform .8s cubic-bezier(.3, 1.5, .5, 1);
}

.needle line {
  stroke: var(--ink);
  stroke-width: 3;
  stroke-linecap: round;
}

.needle circle {
  fill: var(--ink);
}

.ends {
  font: 500 9px "DM Mono", monospace;
  fill: var(--muted);
}

.score {
  font: 500 2.6rem/1 "DM Mono", monospace;
  text-align: center;
  margin: 12px 0 4px;
}

[data-state=idle] .score {
  opacity: .35;
}

.thr {
  text-align: center;
}

.headline {
  font: 400 2.4rem/1.05 "Instrument Serif", serif;
  text-align: center;
  margin: 18px 0 16px;
}

[data-state=ok] .headline {
  color: var(--ok);
}

[data-state=bad] .headline {
  color: var(--bad);
}

dl {
  margin: 0;
}

dl div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 7px 0;
  border-top: 1px dashed var(--line);
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  font-weight: 500;
  text-align: right;
}

details {
  margin-top: 12px;
}

summary {
  cursor: pointer;
  color: var(--muted);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

pre {
  margin: 10px 0 0;
  padding: 12px;
  background: var(--cell);
  font: 400 .85rem "DM Mono", monospace;
  overflow-x: auto;
}

.strip {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 6px;
}

.cell {
  font: 500 .8rem "DM Mono", monospace;
  color: var(--ink);
  background: var(--cell);
  border: 1px solid transparent;
  border-radius: 2px;
  padding: 14px 0;
  cursor: pointer;
}

.cell.ok {
  background: color-mix(in srgb, var(--ok) var(--k), var(--cell));
}

.cell.bad {
  background: color-mix(in srgb, var(--bad) var(--k), var(--cell));
  color: #fff;
}

.cell.unseen {
  background: repeating-linear-gradient(45deg, var(--cell), var(--cell) 4px, transparent 4px, transparent 8px);
  color: var(--muted);
}

.cell.sel {
  border-color: var(--ink);
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.note {
  color: var(--muted);
  margin: 16px 0 0;
  font-size: .8rem;
}

.intro {
  font: 400 1.25rem/1.35 "Instrument Serif", serif;
  color: var(--muted);
  max-width: 40em;
  margin: 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  border-top: 1.5px solid var(--edge);
  padding-top: 12px;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--bad);
}

.steps h3 {
  font: 400 1.5rem/1.1 "Instrument Serif", serif;
  margin: 6px 0 8px;
}

.steps p {
  margin: 0;
  font-size: .85rem;
  color: var(--muted);
}

.how-note {
  margin: 24px 0 0;
  font-size: .85rem;
  max-width: 62em;
}

.how-note.caveat {
  color: var(--muted);
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.how-note strong {
  color: var(--ink);
}

footer {
  margin-top: 36px;
  color: var(--muted);
  font-size: .8rem;
}

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

  .strip {
    grid-template-columns: repeat(6, 1fr);
  }

  .steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .needle,
  .card {
    transition: none;
  }
}