:root {
  color-scheme: light;
  --bg: #f7f7f2;
  --ink: #1f2523;
  --muted: #68716d;
  --line: #d8ddd4;
  --panel: #ffffff;
  --origin: #e8eee8;
  --part: #232a27;
  --a: #1c8ca1;
  --b: #bd3d2a;
  --c: #6b8f1a;
  --good: #1f7d4f;
  --bad: #b92e3a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "Gill Sans", "Trebuchet MS", sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: 22px;
  line-height: 1.15;
  font-weight: 720;
}

h2 {
  font-size: 14px;
  line-height: 1.2;
  margin-bottom: 10px;
}

h3.subhead {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.2;
  text-transform: uppercase;
}

p {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95em;
}

#status {
  min-width: 132px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f9faf8;
  color: var(--good);
  font-size: 13px;
  text-align: center;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  gap: 16px;
  padding: 16px;
}

.controls,
.checks,
.ascii-panel,
.notes-panel,
.trace {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.controls {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 680;
}

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

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfa;
  color: var(--ink);
}

input {
  height: 34px;
  padding: 0 9px;
}

select {
  height: 34px;
  padding: 0 9px;
}

textarea {
  min-height: 128px;
  resize: vertical;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.5;
}

.buttons {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

button {
  min-height: 34px;
  border: 1px solid #bac3b8;
  border-radius: 6px;
  background: #eff3ee;
  color: var(--ink);
  cursor: pointer;
  font-size: 13px;
  font-weight: 680;
}

button:hover {
  border-color: #8d9b8a;
  background: #e8eee7;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.lecture-note {
  margin: -2px 0 0;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f7faf6;
  color: var(--ink);
  line-height: 1.45;
}

.lecture-block {
  display: grid;
  gap: 10px;
  margin-top: -6px;
}

.lecture-block p {
  margin: 0;
  color: var(--ink);
}

.prime-list {
  margin-bottom: 10px;
  padding: 8px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f7faf6;
  color: #21362d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.45;
  max-height: 96px;
  overflow: auto;
}

.input-info {
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f7faf6;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.readings {
  display: grid;
  gap: 6px;
  max-height: 180px;
  margin-bottom: 10px;
  overflow: auto;
}

.reading {
  display: grid;
  grid-template-columns: 46px 48px 58px minmax(70px, 1fr);
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfa;
  color: #405047;
  font-size: 11px;
  line-height: 1.2;
}

.reading strong,
.reading b {
  color: var(--ink);
}

.reading.prime {
  border-color: #b7d6c1;
  background: #f1f9f3;
}

.reading.composite {
  border-color: #ecc0b8;
  background: #fff5f3;
}

.swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.trace {
  min-width: 0;
  overflow: auto;
  padding: 12px;
}

.grid {
  display: grid;
  grid-auto-rows: 22px;
  width: max-content;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
}

.cell {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fbfcfa;
  color: var(--muted);
  line-height: 1;
}

.axis {
  position: sticky;
  z-index: 2;
  background: #eef2ec;
  color: #48514c;
  font-size: 10px;
}

.axis:first-child {
  left: 0;
}

.sample-axis {
  background: #fff2c4;
  color: #4c3b10;
  font-weight: 800;
}

.origin {
  background: var(--origin);
  color: #46504b;
}

.sample-prime {
  outline: 2px solid var(--good);
  outline-offset: -2px;
  background: #eff9f1;
  color: var(--good);
  font-weight: 800;
}

.sample-composite {
  outline: 2px solid var(--bad);
  outline-offset: -2px;
  background: var(--b);
  color: #fff;
  font-weight: 800;
}

.partition {
  background: var(--part);
  color: #fff;
}

.pulse {
  color: #fff;
  font-weight: 800;
}

.pulse-a {
  background: var(--a);
}

.pulse-b {
  background: var(--b);
}

.pulse-c {
  background: var(--c);
}

.pulse-a.pulse-b,
.pulse-a.pulse-c,
.pulse-b.pulse-c {
  background: #6a4778;
}

.checks,
.ascii-panel,
.notes-panel {
  padding: 14px;
}

.checks {
  grid-column: 1;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

th,
td {
  padding: 6px 5px;
  border-bottom: 1px solid var(--line);
  text-align: right;
}

th {
  color: var(--muted);
  font-weight: 720;
}

tbody tr.bad td {
  color: var(--bad);
  font-weight: 760;
}

.ascii-panel,
.notes-panel {
  grid-column: 2;
  min-width: 0;
}

pre {
  margin: 0;
  overflow: auto;
  max-height: 280px;
  color: #33413b;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.35;
}

@media (max-width: 900px) {
  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  #status {
    text-align: left;
  }

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

  .checks,
  .ascii-panel,
  .notes-panel {
    grid-column: 1;
  }
}