/* Rangekeeper.
 *
 * A byte carries its own shell, so this file sets the page frame as well as
 * the machine's own surfaces. Measures in rem, never ch.
 */

* { margin: 0; padding: 0; box-sizing: border-box; }

/* Set --machine, never --accent.
 *
 * logical-art.css computes `body { --accent: var(--machine, var(--la-instrument)) }`,
 * so declaring --accent here on :root is overridden for everything inside
 * body and the whole page silently renders in the fallback grey, #bdbdbd.
 * That is the trap the canon warns about in as many words, and it cost a
 * measurement to find because the rule was present and the colour was not.
 * The accent is the roster's value for rangekeeper. */
body[data-machine="rangekeeper"] { --machine: #c9a227; }

body {
  font-family: var(--la-font-ui);
  background: var(--la-page);
  color: var(--la-ink);
  line-height: var(--la-leading-body);
  -webkit-font-smoothing: antialiased;
}

.rk-main {
  max-width: var(--la-measure);
  margin: 0 auto;
  padding: 3rem 1.25rem 3rem;
}

.rk-head { margin-bottom: var(--la-space-6); }

.rk-lede {
  margin-top: var(--la-space-3);
  color: var(--la-ink-dim);
}

.rk-sr {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.rk-panel {
  margin-top: var(--la-space-6);
  padding: var(--la-space-4);
  border: 1px solid var(--la-hairline-strong);
  border-radius: var(--la-radius, 6px);
  background: color-mix(in srgb, var(--la-ink) 3%, transparent);
}

.rk-panel h2 { margin-bottom: var(--la-space-2); }

.rk-hint, .rk-note {
  color: var(--la-ink-dim);
  font-size: var(--la-text-sm);
  margin-top: var(--la-space-2);
}

/* ---- knobs ------------------------------------------------------------ */

.rk-knobs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--la-space-3) var(--la-space-4);
  margin-top: var(--la-space-4);
}

.rk-knob label {
  display: block;
  font-family: var(--la-font-mono);
  font-size: var(--la-text-xs);
  color: var(--la-ink-dim);
  margin-bottom: var(--la-space-2);
}

.rk-value { color: var(--accent); }

.rk-range {
  width: 100%;
  accent-color: var(--accent);
  min-height: 1.5rem;
}

.rk-range:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---- the passes ------------------------------------------------------- */

.rk-passes {
  width: 100%;
  margin-top: var(--la-space-4);
  border-collapse: collapse;
  font-size: var(--la-text-sm);
}

.rk-passes th {
  text-align: right;
  font-family: var(--la-font-mono);
  font-size: var(--la-text-xs);
  font-weight: 400;
  color: var(--la-ink-dim);
  padding: 0 0 var(--la-space-2) var(--la-space-2);
  border-bottom: 1px solid var(--la-hairline-strong);
}

.rk-passes th:first-child { text-align: left; }

.rk-passes td {
  text-align: right;
  padding: var(--la-space-2) 0 var(--la-space-2) var(--la-space-2);
  border-bottom: 1px solid var(--la-hairline);
  color: var(--la-ink);
}

.rk-passes td:first-child { text-align: left; color: var(--la-ink-dim); }

/* The last pass is the answer: it stops being a guess. */
.rk-passes tbody tr:last-child td { color: var(--accent); }

.rk-num { font-family: var(--la-font-mono); }

/* ---- the readout ------------------------------------------------------ */

.rk-readout {
  margin-top: var(--la-space-4);
  border-top: 1px solid var(--la-hairline);
}

.rk-row {
  display: grid;
  grid-template-columns: 14rem 1fr;
  gap: var(--la-space-3);
  padding: var(--la-space-2) 0;
  border-bottom: 1px solid var(--la-hairline);
}

.rk-row dt {
  font-family: var(--la-font-mono);
  font-size: var(--la-text-xs);
  color: var(--la-ink-dim);
}

.rk-row dd {
  font-size: var(--la-text-sm);
  color: var(--la-ink);
  overflow-wrap: anywhere;
}

.rk-strong dd { color: var(--accent); font-weight: 600; }

.rk-why { margin-top: var(--la-space-6); }
.rk-why h2 { margin-top: var(--la-space-5); margin-bottom: var(--la-space-2); }
.rk-why p { margin-top: var(--la-space-3); color: var(--la-ink-dim); }

@media (max-width: 34rem) {
  .rk-row { grid-template-columns: 1fr; }
  .rk-row dt { color: var(--la-ink-faint); }
}