@font-face {
  font-family: "Courier Prime";
  src: url("/courier-prime.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

:root {
  /* The telegraph form the strips are pasted on. */
  --form: #1c2a4a;
  --form-line: #2c3d63;
  --form-ink: #b9c4dd;
  /* The paper tape and its ink. */
  --tape: #efe6bf;
  --tape-edge: #d9cd99;
  --tape-ink: #2a2620;
  /* The stamp: numbers on the tape, and verdicts. */
  --stamp: #5a3c97;
  --stamp-soft: #8a74bd;
  --strip: "Courier Prime", "Courier New", ui-monospace, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }

/* Hidden means hidden, whatever display a rule gives the element. */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--form);
  /* Faint ruling, as on a printed form. */
  background-image: repeating-linear-gradient(
    to bottom, transparent 0, transparent 39px, var(--form-line) 39px, var(--form-line) 40px);
  color: var(--form-ink);
  font: 400 1rem/1.5 var(--sans);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

main, footer {
  max-width: 34rem;
  margin: 0 auto;
  padding: 0 16px;
}

header { padding: 2.5rem 0 1.5rem; }

h1, h2 {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #e6ebf6;
  margin: 0;
}

h1 { font-size: 1.5rem; line-height: 1.2; }
h2 { font-size: 1.25rem; line-height: 1.25; margin: 2.5rem 0 1rem; }

#story, #findings {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* One strip of tape per line, pasted a little crooked. */
.strip {
  background: var(--tape);
  color: var(--tape-ink);
  font-family: var(--strip);
  font-size: 1.0625rem;
  line-height: 1.45;
  padding: 0.55rem 0.8rem 0.6rem;
  margin: 0 0 0.7rem;
  border-top: 1px solid var(--tape-edge);
  border-bottom: 1px solid var(--tape-edge);
  box-shadow: 0 1px 0 rgba(10, 16, 32, 0.35);
  transform: rotate(var(--tilt, 0deg));
  overflow-wrap: anywhere;
}

.strip:nth-child(3n + 1) { --tilt: -0.35deg; }
.strip:nth-child(3n + 2) { --tilt: 0.25deg; }

.strip .n { color: var(--stamp); }

/* The page's request to the reader is pasted on its own, stamped. */
.strip.ask {
  margin: 1.4rem 0 1.1rem;
  outline: 2px solid var(--stamp);
  outline-offset: 3px;
  --tilt: 0deg;
}

.strip .caret {
  display: inline-block;
  width: 0.55em;
  height: 1em;
  margin-left: 1px;
  vertical-align: -0.12em;
  background: var(--tape-ink);
  animation: blink 0.9s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

#wire {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-size: 0.9375rem;
}

#wire[hidden] { display: none; }

.dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--stamp-soft);
  opacity: 0.35;
  transition: opacity 0.6s ease-out;
}

.dot.pulse { opacity: 1; transition: none; }

button {
  display: block;
  width: 100%;
  margin: 1.8rem 0 0;
  padding: 0.95rem 1rem;
  border: 0;
  border-radius: 2px;
  background: var(--tape);
  color: var(--tape-ink);
  font: 600 1.0625rem/1.3 var(--sans);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 0 0 2px var(--stamp) inset;
}

button:hover { background: #f6efd2; }

:focus-visible {
  outline: 3px solid #f2d36b;
  outline-offset: 3px;
}

.quiet { color: var(--form-ink); margin: 0 0 1rem; }

/* A finding: what was checked, and the stamp it got. */
.finding {
  position: relative;
  padding-right: 6.2rem;
}

.finding h3 {
  font: 600 0.9375rem/1.3 var(--sans);
  margin: 0 0 0.25rem;
  color: var(--tape-ink);
}

.finding p { margin: 0 0 0.3rem; }
.finding p:last-child { margin: 0; }

.stamp {
  position: absolute;
  top: 0.55rem;
  right: 0.7rem;
  padding: 0.1rem 0.45rem;
  border: 2px solid currentColor;
  border-radius: 3px;
  font: 700 0.8125rem/1.3 var(--sans);
  transform: rotate(-6deg);
  color: var(--stamp);
}

.finding.clear .stamp { color: #3f6b4a; }
.finding.unsure .stamp { color: #7a6f55; }

footer {
  padding-top: 3rem;
  padding-bottom: 2.5rem;
  font-size: 0.875rem;
  color: var(--form-ink);
}

footer p { margin: 0 0 0.5rem; max-width: 30rem; }

footer a { color: #e6ebf6; }

@media (prefers-reduced-motion: reduce) {
  .strip .caret { animation: none; }
  .dot { transition: none; }
}

@media (forced-colors: active) {
  .strip, button { border: 1px solid CanvasText; }
  .stamp { border-color: CanvasText; }
}