/* ============================================================
   XERJ Reader-1 on xerj.org: the demo (.r1demo, demo.js) and the request-access form (.r1join, join.js).
   Every selector starts with .r1demo, .r1join or .r1-, so a page that loads this file changes nowhere else.
   Colours are the site's --z-* tokens only: day and night follow the DAY / NIGHT switch. 1px lines, soft tints,
   no shadows. The layout of the demo follows the platform's (web/assets/landing.css there).
   ============================================================ */

.r1-sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.r1demo [hidden], .r1join [hidden] { display: none !important; }

/* ---------- the yellow button: the same one as on the home page ---------- */
.r1-btn, .r1join .btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 22px;
  border-radius: 8px; background: var(--z-brand); color: var(--z-on-brand); border: 1px solid var(--z-brand-deep);
  font: 600 var(--fs-16)/1.2 var(--font-data); text-decoration: none; cursor: pointer;
}
.r1-btn:hover, .r1join .btn-primary:hover { background: var(--z-highlight); color: var(--z-ink); }
.r1-cta { margin: var(--sp-5) 0 var(--sp-2); max-width: none; }

/* ============================================================
   The demo
   ============================================================ */
.r1demo {
  --demo-ink: var(--z-ink);                 /* text, active lines */
  --demo-muted: var(--z-mute);              /* secondary text */
  --demo-line: var(--z-line);               /* 1px borders and rules */
  --demo-edge: var(--z-brand-deep);         /* the line under a highlight */
  --demo-tint: var(--z-highlight);          /* evidence highlight */
  --demo-tint-strong: var(--z-brand);       /* the highlight under the pointer or flashing */
  --demo-on-strong: var(--z-on-brand);      /* text on it */
  --demo-faint: var(--z-faint);             /* symbols and code */
  --demo-surface: var(--z-bg);
  --demo-no: var(--z-neg);                  /* a status that is not an answer */
  color: var(--demo-ink);
  min-width: 0;
}
@supports (color: color-mix(in srgb, red 50%, blue)) {
  .r1demo {
    --demo-tint-strong: color-mix(in srgb, var(--z-brand) 60%, var(--z-bg));
    --demo-faint: color-mix(in srgb, var(--z-ink) 9%, transparent);
  }
  /* night: the full yellow, so the dark text on it keeps its contrast */
  html[data-theme='night'] .r1demo { --demo-tint-strong: var(--z-brand); }
}
.r1-demo-fig { margin: var(--sp-8) 0; padding: 0; max-width: 1200px; scroll-margin-top: var(--sp-4); }
.r1-demo-fig figcaption {
  font-family: var(--font-data); font-size: 13px; letter-spacing: .02em; line-height: 1.6; color: var(--z-mute);
  margin-top: var(--sp-3); max-width: 980px;
}
.r1demo p { max-width: none; }
.r1demo .demo-loading { min-height: 240px; margin: 0; font: 400 14px/1.5 var(--font-data); color: var(--demo-muted); }
.r1demo .demo-label {
  font: 700 12px/1.3 var(--font-data); letter-spacing: .08em; text-transform: uppercase; color: var(--demo-muted); margin: 0 0 8px;
}

.r1demo .demo-types { display: flex; flex-wrap: wrap; gap: 0 16px; margin: 0 0 20px; border-bottom: 1px solid var(--demo-line); }
.r1demo .demo-type-tab {
  appearance: none; background: none; border: 0; border-bottom: 2px solid transparent; border-radius: 0; margin: 0 0 -1px; padding: 10px 1px 9px;
  font: 600 14px/1.25 var(--font-data); letter-spacing: .01em; text-align: left; color: var(--demo-muted); cursor: pointer;
}
.r1demo .demo-type-tab:hover { color: var(--demo-ink); }
.r1demo .demo-type-tab[aria-selected="true"] { color: var(--demo-ink); border-bottom-color: var(--demo-ink); }
.r1demo .demo-panel:focus, .r1demo .demo-panel:focus-visible { outline: none; }
.r1demo .demo-panel.is-loading .demo-stage { opacity: .45; }

.r1demo .demo-cases { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: 0 0 18px; }
.r1demo .demo-case {
  appearance: none; display: flex; flex-direction: column; gap: 3px; min-width: 0; text-align: left; cursor: pointer;
  background: transparent; color: var(--demo-ink); border: 1px solid var(--demo-line); border-radius: 0; padding: 10px 12px 11px;
}
.r1demo .demo-case .l { font: 600 15px/1.25 var(--font-prose); overflow-wrap: anywhere; }
.r1demo .demo-case .t { font: 400 12.5px/1.3 var(--font-data); letter-spacing: .02em; color: var(--demo-muted); }
.r1demo .demo-case:hover, .r1demo .demo-qbtn:hover { border-color: var(--demo-ink); }
.r1demo .demo-case[aria-pressed="true"], .r1demo .demo-qbtn[aria-pressed="true"] { border-color: var(--demo-ink); box-shadow: inset 0 -2px 0 var(--demo-ink); }

.r1demo .demo-questions { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: 0 0 24px; }
.r1demo .demo-qbtn {
  appearance: none; display: flex; align-items: baseline; gap: 8px; min-width: 0; text-align: left; cursor: pointer;
  background: transparent; color: var(--demo-ink); border: 1px solid var(--demo-line); border-radius: 0; padding: 9px 11px 10px;
  font: 400 14px/1.4 var(--font-prose);
}
.r1demo .demo-qbtn .n { flex: none; font: 700 11.5px/1 var(--font-mono); color: var(--demo-muted); }
.r1demo .demo-qbtn .t { min-width: 0; overflow-wrap: anywhere; }
.r1demo .demo-qbtn[aria-pressed="true"] .t { font-weight: 600; }

.r1demo .demo-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.r1demo .demo-card { min-width: 0; margin: 0; background: var(--demo-surface); color: var(--demo-ink); border: 1px solid var(--demo-line); }
.r1demo .demo-file { margin: 0; padding: 9px 16px; border-bottom: 1px solid var(--demo-line); font: 400 12px/1.3 var(--font-mono); letter-spacing: .02em; color: var(--demo-muted); overflow-wrap: anywhere; }
.r1demo .demo-q { padding: 14px 16px 13px; border-bottom: 1px solid var(--demo-line); }
.r1demo .demo-q .demo-label { margin: 0 0 4px; }
.r1demo .demo-q .q { font: 600 18px/1.4 var(--font-prose); margin: 0; overflow-wrap: anywhere; }
.r1demo .demo-text {
  position: relative; margin: 0; padding: 14px 16px 16px; max-height: 440px; overflow-x: hidden; overflow-y: auto;
  font: 400 13px/1.7 var(--font-mono); color: var(--demo-ink); background: none; border: 0;
  white-space: pre-wrap; white-space: break-spaces; overflow-wrap: anywhere; font-variant-ligatures: none;
}
.r1demo .demo-text:focus-visible, .r1demo .demo-json:focus-visible { outline-offset: -3px; }
.r1demo .demo-text.is-tabular { font-size: 12px; }
.r1demo .demo-text mark.ev {
  background: var(--demo-tint); color: inherit; font-weight: inherit; text-decoration: none;
  border-bottom: 1px solid var(--demo-edge); padding: 1px 0; scroll-margin: 40px;
}
.r1demo .demo-text mark.ev::after { content: attr(data-n); margin-left: 2px; font: 700 9.5px/1 var(--font-mono); color: var(--demo-muted); vertical-align: super; }
.r1demo .demo-text mark.ev-extra { background: transparent; border-bottom-style: dashed; }
.r1demo .demo-text mark.ev:focus-visible { outline: 2px solid var(--demo-ink); outline-offset: 1px; }
.r1demo .demo-text mark.is-hot { background: var(--demo-tint-strong); color: var(--demo-on-strong); }
.r1demo .demo-text mark.is-flash { animation: r1demo-flash 1.1s ease-out; }
@keyframes r1demo-flash { 0%, 100% { background: var(--demo-tint); } 30% { background: var(--demo-tint-strong); color: var(--demo-on-strong); } }

.r1demo .demo-out { padding: 16px 18px 18px; }
.r1demo .demo-value { font: 800 clamp(34px, 4.2vw, 50px)/1.04 var(--font-display); letter-spacing: .01em; margin: 0 0 10px; overflow-wrap: anywhere; }
.r1demo .demo-value.is-none, .r1demo .demo-value.is-long { font-size: clamp(26px, 3vw, 34px); }
.r1demo .demo-value.is-xlong { font: 700 clamp(17px, 1.7vw, 20px)/1.35 var(--font-mono); letter-spacing: 0; }
.r1demo .demo-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; margin: 0 0 10px; font: 400 12.5px/1.3 var(--font-mono); color: var(--demo-muted); }
.r1demo .demo-meta .st-badge { font: 700 11px/1 var(--font-mono); letter-spacing: .1em; padding: 4px 6px; background: transparent; color: var(--demo-ink); border: 1px solid var(--demo-ink); }
.r1demo .demo-meta .st-badge.st-no { color: var(--demo-no); border-color: var(--demo-no); }
.r1demo .demo-conf .v { color: var(--demo-ink); font-weight: 700; }
.r1demo .demo-cbar { height: 2px; margin: 0 0 18px; background: var(--demo-line); }
.r1demo .demo-cbar i { display: block; width: 0; height: 100%; background: var(--demo-ink); }
.r1demo .sym-formula {
  margin: 0 0 18px; padding: 10px 12px; background: var(--z-code-bg); border: 1px solid var(--z-code-line);
  font: 400 14.5px/1.9 var(--font-mono); color: var(--demo-ink); overflow-wrap: anywhere; font-variant-ligatures: none;
}
.r1demo .sym-formula.plain { white-space: pre-wrap; }
.r1demo .sym-formula .sym, .r1demo .demo-steps .sym {
  font: 700 .92em/1.3 var(--font-mono); letter-spacing: .03em; background: var(--demo-faint); color: var(--demo-ink); padding: 2px 4px;
}
.r1demo .sym-formula .p, .r1demo .sym-formula .lit { color: var(--demo-muted); }
.r1demo .sym-formula a.q, .r1demo .demo-steps a.q, .r1demo .sym-formula span.q, .r1demo .demo-steps span.q {
  background: var(--demo-tint); color: var(--demo-ink); border-bottom: 1px solid var(--demo-edge); text-decoration: none; padding: 1px 2px;
}
.r1demo .demo-steps a.q, .r1demo .demo-steps span.q { font: 400 .92em/1.45 var(--font-mono); }
.r1demo .sym-formula a.q:hover, .r1demo .demo-steps a.q:hover, .r1demo .sym-formula a.q:focus-visible, .r1demo .demo-steps a.q:focus-visible {
  background: var(--demo-tint-strong); color: var(--demo-on-strong);
}
.r1demo .sym-formula .eq { font-weight: 700; }
.r1demo .sym-formula .res { font-weight: 700; border-bottom: 2px solid var(--demo-ink); }
.r1demo .sym-formula .res.is-no { color: var(--demo-no); border-bottom-color: var(--demo-no); }
.r1demo .demo-steps { list-style: none; margin: 0 0 14px; padding: 0; counter-reset: r1step; }
.r1demo .demo-steps li {
  counter-increment: r1step; display: grid; grid-template-columns: 18px 84px minmax(0, 1fr); align-items: baseline; gap: 4px 10px;
  margin: 0; padding: 8px 0; border-top: 1px solid var(--demo-line); font: 400 15px/1.55 var(--font-prose);
}
.r1demo .demo-steps li:last-child { border-bottom: 1px solid var(--demo-line); }
.r1demo .demo-steps li::before { content: counter(r1step); font: 400 12px/1 var(--font-mono); color: var(--demo-muted); }
.r1demo .demo-steps .sym { justify-self: start; }
.r1demo .demo-steps .st-t { min-width: 0; overflow-wrap: anywhere; }
.r1demo .demo-steps .v { font: 700 .92em/1.45 var(--font-mono); }
.r1demo .demo-steps code { font: 400 .9em/1.45 var(--font-mono); background: var(--demo-faint); padding: 1px 4px; overflow-wrap: anywhere; }
.r1demo details.prog { margin: 0; }
.r1demo details.prog > summary { cursor: pointer; padding: 8px 0 6px; font: 700 12px/1.3 var(--font-data); letter-spacing: .08em; text-transform: uppercase; color: var(--demo-muted); }
.r1demo details.prog > summary:hover { color: var(--demo-ink); }
.r1demo .demo-json { margin: 6px 0 0; padding: 10px 12px; max-height: 320px; overflow: auto; background: var(--z-code-bg); border: 1px solid var(--z-code-line); font: 400 12.5px/1.6 var(--font-mono); color: var(--demo-ink); }
.r1demo .demo-json code { font: inherit; background: none; padding: 0; }
.r1demo .demo-foot { display: flex; flex-wrap: wrap; gap: 6px 24px; margin: 14px 0 0; font: 400 14px/1.5 var(--font-data); }
.r1demo .demo-share, .r1demo .demo-more, .r1demo .demo-link-btn {
  appearance: none; background: none; border: 0; padding: 0; cursor: pointer; font: inherit; color: var(--demo-muted);
  text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; text-align: left;
}
.r1demo .demo-share:hover, .r1demo .demo-more:hover, .r1demo .demo-link-btn:hover { color: var(--demo-ink); }
.r1demo .notice { margin: 0; padding: 12px 14px; font: 400 15px/1.5 var(--font-prose); color: var(--demo-ink); border: 1px solid var(--demo-line); }

@media (max-width: 1080px) {
  .r1demo .demo-cases, .r1demo .demo-questions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
  .r1demo .demo-grid { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .r1demo .demo-text { max-height: 320px; }
}
@media (max-width: 720px) {
  .r1demo .demo-cases { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .r1demo .demo-questions { grid-template-columns: minmax(0, 1fr); gap: 8px; }
}
@media (max-width: 600px) {
  .r1demo .demo-type-tab { padding: 9px 1px 8px; }
  .r1demo .demo-case { padding: 9px 10px 10px; }
  .r1demo .demo-case .l { font-size: 14.5px; }
  .r1demo .demo-q { padding: 12px 14px 11px; }
  .r1demo .demo-q .q { font-size: 16.5px; }
  .r1demo .demo-file { padding: 8px 14px; }
  .r1demo .demo-text { padding: 12px 14px 14px; font-size: 12.5px; }
  .r1demo .demo-text.is-tabular { font-size: 11.5px; }
  .r1demo .demo-out { padding: 14px 14px 16px; }
  .r1demo .sym-formula { font-size: 13.5px; padding: 8px 10px; }
  .r1demo .demo-steps li { grid-template-columns: 14px 74px minmax(0, 1fr); gap: 4px 8px; }
}
@media (forced-colors: active) {
  .r1demo .demo-text mark.ev, .r1demo .sym-formula a.q, .r1demo .demo-steps a.q { forced-color-adjust: auto; text-decoration: underline; }
  .r1demo .demo-case[aria-pressed="true"], .r1demo .demo-qbtn[aria-pressed="true"] { outline: 2px solid CanvasText; }
  .r1demo .demo-type-tab[aria-selected="true"] { border-bottom-width: 3px; }
}
@media (prefers-reduced-motion: reduce) {
  .r1demo .demo-text mark.is-flash { animation: none; background: var(--demo-tint-strong); color: var(--demo-on-strong); }
}
@media print {
  .r1demo .demo-text, .r1demo .demo-json { max-height: none; overflow: visible; }
  .r1demo .demo-foot { display: none; }
}

/* ============================================================
   The request-access form
   ============================================================ */
.r1join {
  --join-edge: var(--z-mute);               /* field borders: 3:1 or better against the page */
  max-width: 620px; margin: var(--sp-8) 0; padding: var(--sp-6) var(--sp-8) var(--sp-8);
  border: 1px solid var(--z-line); border-radius: 8px; background: var(--z-bg); color: var(--z-ink);
  scroll-margin-top: var(--sp-6);
}
@supports (color: color-mix(in srgb, red 50%, blue)) {
  .r1join { --join-edge: color-mix(in srgb, var(--z-ink) 50%, var(--z-bg)); }
}
.r1join p { max-width: none; }
.r1join .join-title { font: 800 34px/1 var(--font-display); letter-spacing: .01em; margin: 0 0 var(--sp-4); color: var(--z-ink); }
.r1join .join { position: relative; }
.r1join .join-progress {
  list-style: none; margin: 0 0 var(--sp-5); padding: 0; display: flex; gap: 22px; border-bottom: 1px solid var(--z-line);
  font: 600 12.5px/1 var(--font-data); letter-spacing: .06em; text-transform: uppercase; color: var(--z-mute);
}
.r1join .join-progress li { display: flex; align-items: center; gap: 7px; margin: 0 0 -1px; padding: 0 0 12px; white-space: nowrap; }
.r1join .join-progress li[aria-current="step"] { padding-bottom: 10px; color: var(--z-ink); border-bottom: 2px solid var(--z-brand); }
.r1join .join-progress li.is-done .n {
  display: inline-block; width: 10px; height: 6px; margin: 0 1px 3px; font-size: 0;
  border-left: 1.5px solid var(--z-mute); border-bottom: 1.5px solid var(--z-mute); transform: rotate(-45deg);
}
.r1join .field { display: flex; flex-direction: column; gap: 6px; margin: 0 0 14px; }
.r1join .label { font: 600 14px/1.3 var(--font-data); letter-spacing: .01em; color: var(--z-ink); }
.r1join .label .mute { font-weight: 400; color: var(--z-mute); }
.r1join .hint { margin: 0; font: 400 14px/1.45 var(--font-data); color: var(--z-mute); }
.r1join input[type="text"], .r1join input[type="email"], .r1join textarea {
  width: 100%; min-height: 46px; margin: 0; padding: 10px 12px; border: 1px solid var(--join-edge); border-radius: 4px;
  background: var(--z-bg); color: var(--z-ink); font: 400 16px/1.4 var(--font-prose);
}
.r1join textarea { min-height: 68px; line-height: 1.5; resize: vertical; }
.r1join input:focus-visible, .r1join textarea:focus-visible { outline-offset: 1px; border-color: var(--z-ink); }
.r1join input[aria-invalid="true"], .r1join textarea[aria-invalid="true"] { border-color: var(--z-neg); box-shadow: inset 0 0 0 1px var(--z-neg); }
.r1join .field-error { margin: 0; font: 600 14px/1.4 var(--font-data); color: var(--z-neg); }
.r1join .join-form-error { margin: 0 0 12px; padding: 10px 12px; border: 1px solid var(--z-neg); border-left-width: 3px; border-radius: 4px; }
.r1join .hp { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.r1join .join-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 8px 0 14px; }
.r1join .btn { appearance: none; margin: 0; }
.r1join .btn .arrow { font-family: var(--font-prose); }
.r1join .btn-quiet {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 18px; border-radius: 8px;
  background: none; color: var(--z-ink); border: 1px solid var(--join-edge); font: 600 15px/1.2 var(--font-data); cursor: pointer;
}
.r1join .btn-quiet:hover { border-color: var(--z-ink); background: var(--z-highlight); }
.r1join .btn:disabled { opacity: .55; cursor: not-allowed; }
.r1join .btn-primary:disabled:hover { background: var(--z-brand); color: var(--z-on-brand); }
.r1join .btn-quiet:disabled:hover { border-color: var(--join-edge); background: none; }
.r1join .join-fine { margin: 0; font: 400 14px/1.5 var(--font-data); color: var(--z-mute); }
.r1join .join-fine a, .r1join .link-btn {
  color: var(--z-link); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em;
}
.r1join .join-fine a:hover, .r1join .link-btn:hover { color: var(--z-ink); text-decoration-thickness: 2px; text-decoration-color: var(--z-brand-deep); }
.r1join .link-btn { appearance: none; background: none; border: 0; padding: 0; font: inherit; cursor: pointer; }
.r1join .join-h { font: 800 28px/1.05 var(--font-display); letter-spacing: .01em; margin: 0 0 10px; color: var(--z-ink); }
.r1join .join-h:focus-visible { outline-offset: 4px; }
.r1join .join-body { margin: 0 0 14px; font: 400 16px/1.55 var(--font-prose); color: var(--z-ink); }
.r1join .join-body .ink { font-weight: 600; overflow-wrap: anywhere; }
.r1join .code-input { max-width: 260px; font: 700 26px/1 var(--font-mono); letter-spacing: .3em; }
.r1join .join-done-text { margin: 0 0 10px; font: 400 18px/1.5 var(--font-prose); color: var(--z-ink); }
.r1join .place-line { margin: 0 0 14px; font: 400 16px/1.6 var(--font-prose); color: var(--z-ink); }
.r1join .place-line .place-n { font: 800 30px/1 var(--font-display); letter-spacing: .01em; margin: 0 2px; }
.r1join noscript p { margin: 0; font: 400 16px/1.55 var(--font-prose); }

@media (max-width: 720px) {
  .r1join { padding: var(--sp-5) var(--sp-4) var(--sp-6); }
  .r1join .join-title { font-size: 30px; }
  .r1join .join-progress { gap: 16px; }
  .r1join .btn-primary, .r1join .btn-quiet { white-space: normal; }
}
@media print { .r1join { display: none; } }