:root {
  --bg: #0b0b0a;
  --fg: #ecebe4;
  --muted: #86847b;
  --line: #262520;
  --line-strong: #3a3931;
  --green: #8fd16a;
  --red: #e25a41;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Archivo', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

button, input, textarea { font: inherit; color: inherit; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 28px 40px;
}

.mark {
  font-weight: 800;
  letter-spacing: 0.18em;
  text-decoration: none;
  font-size: 14px;
}

.top nav { display: flex; gap: 28px; }

.top nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
}

.top nav a:hover { color: var(--fg); }

/* Hero */

.hero {
  padding: 12vh 40px 14vh;
  text-align: center;
}

.hero-genes {
  font: 700 clamp(64px, 17vw, 240px)/1 var(--mono);
  letter-spacing: -0.02em;
  display: flex;
  justify-content: center;
}

.hero-genes span { opacity: 0; animation: in 0.9s ease forwards; }
.hero-genes span:nth-child(2) { animation-delay: 0.08s; }
.hero-genes span:nth-child(3) { animation-delay: 0.16s; }
.hero-genes span:nth-child(4) { animation-delay: 0.24s; }
.hero-genes span:nth-child(5) { animation-delay: 0.32s; }
.hero-genes span:nth-child(6) { animation-delay: 0.40s; }

@keyframes in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.hero-line {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
}

/* Gene colours */

.g { color: var(--green); }
.r { color: var(--red); }

/* Sections */

.block {
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  gap: 40px;
  padding: 56px 40px;
  border-top: 1px solid var(--line);
}

.label {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
}

.label span {
  display: block;
  font: 400 12px var(--mono);
  color: var(--muted);
  margin-bottom: 6px;
}

.note {
  color: var(--muted);
  margin: 0 0 20px;
  max-width: 60ch;
}

textarea {
  width: 100%;
  min-height: 150px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  padding: 16px;
  font: 400 18px/1.6 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  resize: vertical;
  outline: none;
}

textarea:focus { border-color: var(--muted); }

textarea::placeholder { color: #45443c; }

.row-actions {
  display: flex;
  gap: 24px;
  align-items: baseline;
  margin-top: 12px;
}

.text-btn {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-btn:hover { color: var(--fg); }

.count {
  margin-left: auto;
  font: 400 13px var(--mono);
  color: var(--muted);
}

.parsed {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
  margin-top: 24px;
}

.genes {
  font: 700 20px var(--mono);
  letter-spacing: 0.14em;
}

.genes.muted { color: var(--muted); letter-spacing: 0.04em; }

/* Targets */

.targets { border-top: 1px solid var(--line); margin-bottom: 20px; }

.targets label {
  display: grid;
  grid-template-columns: 20px 150px 1fr;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.targets input[type=radio] {
  appearance: none;
  width: 12px;
  height: 12px;
  margin: 0;
  border: 1px solid var(--muted);
  border-radius: 0;
}

.targets input[type=radio]:checked { background: var(--green); border-color: var(--green); }

.targets em { font-style: normal; color: var(--muted); font-size: 15px; }

.custom { display: inline-flex; gap: 10px; align-items: center; font-family: var(--mono); }

.custom input {
  width: 48px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  padding: 2px 4px;
  text-align: center;
  outline: none;
}

.go {
  background: var(--fg);
  color: var(--bg);
  border: 0;
  border-radius: 0;
  padding: 16px 32px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.go:hover { background: var(--green); }
.go:disabled { background: var(--line-strong); color: var(--muted); cursor: wait; }

/* Result */

.verdict {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 8px;
  max-width: 40ch;
}

.verdict + .note { margin-bottom: 40px; }

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
}

.step-head {
  font: 400 12px var(--mono);
  color: var(--muted);
  margin-bottom: 14px;
  letter-spacing: 0.08em;
}

.step dl { margin: 0; }

.step dt {
  font-size: 13px;
  color: var(--muted);
  margin-top: 14px;
}

.step dt:first-child { margin-top: 0; }

.step dd { margin: 2px 0 0; }

.step dd .genes { font-size: 17px; }

.donor-line { display: block; }

.donor-line b { font: 400 14px var(--mono); color: var(--muted); margin-right: 10px; }

.chance { font: 700 17px var(--mono); }

.how {
  margin: 20px 0 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
}

/* Planter grid */

.grid {
  display: grid;
  grid-template-columns: repeat(3, 92px);
  grid-template-rows: repeat(3, 92px);
  border-left: 1px solid var(--line-strong);
  border-top: 1px solid var(--line-strong);
}

.cell {
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font: 700 12px var(--mono);
  letter-spacing: 0.1em;
  position: relative;
}

.cell.empty { color: #45443c; }

.cell.centre { background: #151a11; outline: 1px solid var(--green); outline-offset: -1px; }

.cell .tag {
  position: absolute;
  top: 6px;
  left: 7px;
  font-weight: 400;
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* Guide */

.gene-table { border-collapse: collapse; width: 100%; margin-bottom: 40px; }

.gene-table td { padding: 14px 16px 14px 0; border-bottom: 1px solid var(--line); vertical-align: baseline; }

.gene-table td:nth-child(3) { color: var(--muted); }

.gene-table .gene { font: 700 26px var(--mono); width: 48px; }

.gene-table .w { font-family: var(--mono); text-align: right; color: var(--muted); }

.guide h3 { font-size: 18px; margin: 36px 0 10px; }

.guide p, .guide li { max-width: 62ch; }

.guide ol { padding-left: 20px; }

.guide li { margin-bottom: 6px; }

.foot {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.foot span:first-child { font-weight: 800; letter-spacing: 0.18em; color: var(--fg); }

@media (max-width: 860px) {
  .top { padding: 20px 16px; }
  .top nav { gap: 16px; }
  .hero { padding: 8vh 16px 10vh; }
  .block { grid-template-columns: 1fr; gap: 20px; padding: 40px 16px; }
  .targets label { grid-template-columns: 16px 110px 1fr; gap: 12px; }
  .step { grid-template-columns: 1fr; gap: 24px; }
  .grid { grid-template-columns: repeat(3, 1fr); grid-template-rows: none; max-width: 330px; }
  .grid .cell { aspect-ratio: 1; }
  .foot { flex-direction: column; padding: 32px 16px; }
}

.from {
  display: block;
  font: 400 9px var(--mono);
  letter-spacing: 0.08em;
  color: var(--green);
  margin-top: 4px;
}

.cell { flex-direction: column; }

.cell .from { position: absolute; bottom: 6px; left: 0; right: 0; text-align: center; margin: 0; }

.donor-line .from, dd > .from { display: inline; margin: 0 0 0 12px; }

.uses { font-size: 15px; }

.need { display: block; margin-top: 4px; color: var(--green); font-size: 14px; }

/* Steps slider */

.steps-pick {
  display: grid;
  grid-template-columns: 110px 1fr 80px;
  align-items: center;
  gap: 20px;
  margin: 8px 0 10px;
  max-width: 520px;
}

.steps-pick label { font-size: 14px; }

.steps-pick output { font: 700 15px var(--mono); text-align: right; }

.steps-pick input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 20px;
  background: transparent;
  margin: 0;
}

.steps-pick input[type=range]::-webkit-slider-runnable-track { height: 1px; background: var(--line-strong); }
.steps-pick input[type=range]::-moz-range-track { height: 1px; background: var(--line-strong); }

.steps-pick input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -7px;
  background: var(--green);
  border: 0;
  border-radius: 0;
  cursor: pointer;
}

.steps-pick input[type=range]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--green);
  border: 0;
  border-radius: 0;
  cursor: pointer;
}

.steps-pick + .note { margin-bottom: 28px; }

/* Steps in the plan */

.round { margin-top: 12px; }

.round-head {
  display: flex;
  gap: 20px;
  align-items: baseline;
  padding: 28px 0 0;
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 14px;
}

.round-head span { font: 700 14px var(--mono); letter-spacing: 0.1em; color: var(--fg); }

.round .step:first-of-type { border-top: 0; }

@media (max-width: 860px) {
  .steps-pick { grid-template-columns: 90px 1fr 64px; gap: 12px; }
  .round-head { flex-direction: column; gap: 4px; }
}