/* OYEE — Swiss monumental B&W.
   System: pure white ground, near-black ink, ONE red (#E63312) used surgically
   (current state, key data, active selections). Hairline rules, oversized
   numerals, tight grotesque display type, zero border-radius, zero shadows.
   Rules: no inline styles in HTML (strict CSP); dynamic values via CSSOM only. */

:root {
  --paper: #FFFFFF;
  --ink: #0A0A0A;
  --ink-60: #5A5A5A;
  --ink-30: #B8B8B8;
  --red: #E63312;
  --hair: 1px solid var(--ink);
  --hair-soft: 1px solid #DCDCDC;
  --grot: "Helvetica Neue", Helvetica, "Segoe UI", Arial, sans-serif;
  --utility: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--grot);
  font-size: 1.0525rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
.wrap { max-width: 62rem; margin: 0 auto; padding: 0 clamp(1.1rem, 4vw, 2.5rem); }

h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.02; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 9vw, 6.4rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
h3 { font-size: 1.15rem; line-height: 1.25; margin: 2.2rem 0 .6rem; }
p { margin: 0 0 1rem; text-wrap: pretty; }
a { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--red); }
strong { font-weight: 700; }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 99; }
.skip-link:focus { left: 0; top: 0; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

/* ---------- masthead ---------- */
.masthead { border-bottom: var(--hair); }
.masthead-row { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; }
.brand {
  display: inline-flex; align-items: baseline; gap: .55rem;
  font-weight: 700; font-size: 1.15rem; letter-spacing: .22em;
  color: var(--ink); text-decoration: none;
}
.brand:hover { color: var(--ink); }
.brand .bell-mark { display: none; }
.brand span::after { content: "."; color: var(--red); }
.masthead-tools { display: flex; align-items: center; gap: 1.1rem; }
.bells-chip {
  font-family: var(--utility); font-size: .72rem; letter-spacing: .08em;
  color: var(--ink-60); white-space: nowrap;
}
.bells-chip svg { display: none; }
.lang-toggle {
  font-family: var(--grot); font-size: .8rem; font-weight: 700; letter-spacing: .18em;
  background: none; border: none; border-bottom: 2px solid var(--ink);
  padding: .1rem 0; cursor: pointer; color: var(--ink);
}
.lang-toggle:hover { color: var(--red); border-color: var(--red); }

/* ---------- hero ---------- */
.hero { padding: clamp(3rem, 9vw, 6.5rem) 0 clamp(2.4rem, 6vw, 4.5rem); border-bottom: var(--hair); }
.crier-line {
  font-family: var(--utility); font-size: .78rem; font-weight: 400;
  letter-spacing: .34em; text-transform: uppercase; color: var(--red);
  margin: 0 0 1.4rem;
}
.hero h1 { max-width: 15ch; }
.hero h1 em { font-style: normal; color: var(--ink-30); }
.lede {
  font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.5; max-width: 36rem;
  margin: 2rem 0 0; color: var(--ink);
}
.hero .btn-primary { margin-top: 2.2rem; }

.kicker {
  font-family: var(--utility); font-size: .72rem; letter-spacing: .3em;
  text-transform: uppercase; color: var(--ink-60); margin: 0 0 1rem;
}

/* ---------- facts strip (Quebec grounding) ---------- */
.facts { border-bottom: var(--hair); }
.facts-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.fact { padding: 1.8rem 1.6rem 1.8rem 0; border-right: var(--hair-soft); }
.fact:last-child { border-right: none; }
.fact + .fact { padding-left: 1.6rem; }
.fact-num { font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.fact-num sup { font-size: .55em; color: var(--red); font-weight: 700; }
.fact p { font-size: .88rem; color: var(--ink-60); margin: .6rem 0 0; line-height: 1.45; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; font-family: var(--grot); font-weight: 700; font-size: .95rem;
  letter-spacing: .04em; border: var(--hair); background: var(--paper); color: var(--ink);
  padding: .75rem 1.6rem; cursor: pointer; text-decoration: none; text-align: center;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--red); border-color: var(--red); color: var(--paper); }
.btn-quiet { border-color: var(--ink-30); font-weight: 500; }
.btn-quiet:hover { border-color: var(--ink); background: var(--paper); color: var(--ink); }
.btn[disabled] { opacity: .35; cursor: not-allowed; }

/* ---------- former mascot bubble → severe pull-quote ---------- */
.mascot-row { margin: 2rem 0 0; }
.mascot-row .bell-mark { display: none; }
.speech { border-left: 3px solid var(--red); padding: .2rem 0 .2rem 1.2rem; max-width: 40rem; }
.speech::before { display: none; }
.speech p { margin: 0; font-size: 1.02rem; line-height: 1.55; color: var(--ink-60); }

/* ---------- journey index (home) ---------- */
.journey-section { padding: clamp(2.4rem, 6vw, 4.5rem) 0; }
.progress-track { height: 2px; background: #E8E8E8; margin: 2rem 0 .5rem; }
.progress-fill { display: block; height: 100%; background: var(--red); width: 0; }
.progress-label { font-family: var(--utility); font-size: .74rem; letter-spacing: .06em; color: var(--ink-60); }

.journey { list-style: none; margin: 2rem 0 0; padding: 0; border-top: var(--hair); }
.journey li { border-bottom: var(--hair); }
.journey-card {
  display: grid; grid-template-columns: clamp(4rem, 10vw, 7rem) 1fr auto;
  align-items: center; gap: clamp(.8rem, 3vw, 2rem);
  padding: 1.6rem 0; text-decoration: none; color: var(--ink);
}
.journey-card:hover { color: var(--ink); }
.journey-card:hover .journey-title { color: var(--red); }
.journey-num {
  font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 700; letter-spacing: -0.04em;
  line-height: 1; color: var(--ink-30);
}
.journey-card.is-next .journey-num { color: var(--red); }
.journey-card.is-done .journey-num { color: var(--ink); }
.journey-title { display: block; font-size: clamp(1.15rem, 2.6vw, 1.7rem); font-weight: 700; letter-spacing: -0.02em; }
.journey-tagline { font-size: .92rem; color: var(--ink-60); margin: .25rem 0 0; }
.journey-state {
  font-family: var(--utility); font-size: .7rem; letter-spacing: .22em;
  text-transform: uppercase; color: var(--ink-60); white-space: nowrap;
}
.journey-card.is-done .journey-state { color: var(--ink); }
.journey-card.is-next .journey-state { color: var(--red); }
.journey-note { font-size: .88rem; color: var(--ink-60); margin-top: 1.4rem; }

/* ---------- chapter layout ---------- */
.chapter-hero { padding: clamp(2.4rem, 6vw, 4rem) 0 2rem; border-bottom: var(--hair); }
.section { padding: clamp(2.2rem, 5vw, 3.6rem) 0; }
.section + .section { border-top: var(--hair-soft); }
.section-label {
  display: inline-block; font-family: var(--utility); font-size: .7rem;
  letter-spacing: .3em; text-transform: uppercase; color: var(--paper);
  background: var(--ink); padding: .35rem .8rem; margin-bottom: 1.6rem;
}
.learn-block { max-width: 40rem; }
.learn-block h3 { border-top: var(--hair); padding-top: 1rem; }

.try-card, .check-card { border: var(--hair); padding: clamp(1.2rem, 3vw, 2rem); margin-top: 1rem; }

.callout { border-left: 3px solid var(--red); padding: .3rem 0 .3rem 1.2rem; margin: 1.6rem 0; }
.callout p:last-child { margin-bottom: 0; }

/* timeline */
.timeline { list-style: none; margin: 1.4rem 0; padding: 0; border-top: var(--hair); }
.timeline li { padding: 1rem 0; border-bottom: var(--hair-soft); }
.timeline li::before { display: none; }
.timeline .tl-year {
  font-family: var(--utility); font-size: .74rem; letter-spacing: .12em;
  color: var(--red); display: block; margin-bottom: .2rem;
}

/* ---------- quiz ---------- */
.quiz-progress { font-family: var(--utility); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-60); margin-bottom: 1rem; }
.quiz-q { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.015em; margin: 0 0 1.2rem; line-height: 1.3; }
.quiz-choices { display: grid; gap: 0; margin: 0 0 1rem; padding: 0; list-style: none; border-top: var(--hair); }
.quiz-choices li { border-bottom: var(--hair-soft); }
.quiz-choice {
  width: 100%; text-align: left; font-family: var(--grot); font-size: 1rem;
  background: none; border: none; padding: .9rem .2rem; cursor: pointer; color: var(--ink);
  display: block;
}
.quiz-choice:hover { color: var(--red); }
.quiz-choice.is-right { color: var(--ink); font-weight: 700; box-shadow: inset 3px 0 0 var(--ink); padding-left: 1rem; }
.quiz-choice.is-wrong { color: var(--ink-30); text-decoration: line-through; }
.quiz-feedback { padding: 1rem 0 0; margin: .4rem 0; font-size: .98rem; }
.quiz-feedback.is-right { border-top: 2px solid var(--ink); }
.quiz-feedback.is-wrong { border-top: 2px solid var(--red); }
.quiz-feedback p { margin: 0 0 1rem; max-width: 38rem; }
.quiz-result { font-weight: 700; font-size: 1.3rem; letter-spacing: -0.02em; }

/* ---------- shared game bits ---------- */
.game-status { font-family: var(--utility); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-60); margin-bottom: .8rem; }
.bell-award {
  display: inline-block; font-family: var(--utility); font-size: .74rem;
  letter-spacing: .08em; color: var(--red); border: 1px solid var(--red);
  padding: .25rem .7rem; margin: .4rem 0;
}
.bell-award svg { display: none; }
.poll-answer-note { color: var(--ink-60); font-size: .98rem; }

/* predictor */
.pred-sentence {
  font-size: clamp(1.3rem, 3vw, 1.9rem); font-weight: 700; letter-spacing: -0.02em;
  border-top: var(--hair); border-bottom: var(--hair); padding: 1.2rem 0; line-height: 1.35;
}
.pred-options { display: grid; gap: 0; margin-top: 1.2rem; border-top: var(--hair-soft); }
.pred-option {
  display: grid; grid-template-columns: 8rem 1fr 3.4rem; align-items: center; gap: 1rem;
  background: none; border: none; border-bottom: var(--hair-soft);
  padding: .8rem .2rem; cursor: pointer; font-family: var(--grot); font-size: 1rem;
  color: var(--ink); text-align: left;
}
.pred-option:hover .pred-word { color: var(--red); }
.pred-word { font-weight: 700; }
.pred-bar-wrap { height: 2px; background: #E8E8E8; }
.pred-bar { display: block; height: 100%; background: var(--ink); }
.pred-option:hover .pred-bar { background: var(--red); }
.pred-pct { font-family: var(--utility); font-size: .74rem; text-align: right; color: var(--ink-60); }

/* critter — instrument skin */
.critter-stage { display: grid; grid-template-columns: minmax(6.5rem, 8.5rem) 1fr; gap: 2rem; align-items: start; }
.critter-svg { width: 100%; height: auto; }
.critter-meter-label { font-family: var(--utility); font-size: .68rem; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-60); margin-top: .8rem; }
.critter-meter { height: 2px; background: #E8E8E8; margin-top: .4rem; }
.critter-meter-fill { display: block; height: 100%; background: var(--red); width: 0; }
.critter-say { min-height: 2.4rem; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.015em; }
.card-tray { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1rem; }
.fruit-card {
  display: grid; justify-items: center; gap: .4rem;
  background: none; border: var(--hair); padding: .8rem 1rem; cursor: pointer;
  font-family: var(--utility); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--ink);
}
.fruit-card[disabled] { opacity: .25; cursor: default; }
.fruit-card:not([disabled]):hover { border-color: var(--red); color: var(--red); }
.fruit-card svg { width: 2.4rem; height: 2.4rem; }

/* ---------- completion ---------- */
.complete-card { border: 2px solid var(--ink); padding: 2rem; margin-top: 2rem; }
.badge-name { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 700; letter-spacing: -0.02em; margin: .4rem 0 1rem; }
.badge-name::after { content: " —"; color: var(--red); }

.chapter-nav { display: flex; justify-content: space-between; gap: 1rem; padding: 2rem 0 3rem; }

/* celebration disabled in this design language */
.confetti-field, .confetti { display: none; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* game statement + verdicts (ch3/ch4/ch5) */
.halluc-statement {
  font-size: clamp(1.15rem, 2.6vw, 1.5rem); font-weight: 700; letter-spacing: -0.015em;
  border-top: var(--hair); border-bottom: var(--hair); padding: 1.1rem 0; line-height: 1.4; max-width: 42rem;
}
.halluc-btnrow { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.1rem 0 .4rem; }
.verdict-tag {
  display: inline-block; font-family: var(--utility); font-size: .68rem; letter-spacing: .2em;
  padding: .2rem .6rem; border: 1px solid currentColor; vertical-align: middle;
}
.verdict-tag.is-true { color: var(--ink); }
.verdict-tag.is-false { color: var(--red); }

/* homework two-column replay (ch5) */
.hw-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.hw-title { margin: 0 0 1rem; border-bottom: var(--hair); padding-bottom: .5rem; }
.hw-chat { display: grid; gap: .7rem; align-content: start; }
.hw-bubble { border: var(--hair-soft); padding: .6rem .8rem; }
.hw-student { border-left: 3px solid var(--ink); }
.hw-ai { border-left: 3px solid var(--red); }
.hw-who { display: block; font-family: var(--utility); font-size: .64rem; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-60); margin-bottom: .25rem; }
.hw-note { font-size: .9rem; color: var(--ink-60); font-style: italic; border-top: var(--hair); padding-top: .7rem; }
.btn-step { border-style: dashed; font-weight: 500; }
@media (max-width: 640px) { .hw-grid { grid-template-columns: 1fr; } }

/* team member (equipe) */
.member { border-top: var(--hair); padding-top: 1.4rem; max-width: 42rem; }
.member-name { font-size: clamp(1.5rem, 3.5vw, 2.2rem); font-weight: 700; letter-spacing: -0.02em; margin: 0 0 .2rem; }
.member-name::after { content: "."; color: var(--red); }
.member-role { font-family: var(--utility); font-size: .72rem; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-60); margin: 0 0 .9rem; }
.member-bio { font-size: 1rem; line-height: 1.6; }

/* machine view (ch1) + datapath (ch4) + charts */
.mch-stage, .dp-stage, .ev-stage, .vm-stage { width: 100%; height: auto; display: block; }
.mch-token-text { font-family: var(--grot); font-size: 15px; font-weight: 700; fill: #0A0A0A; }
.mch-bar-word { font-family: var(--grot); font-size: 14px; font-weight: 700; fill: #0A0A0A; }
.mch-bar-val { font-family: var(--utility); font-size: 12px; fill: #5A5A5A; }
.mch-caption { font-family: var(--utility); font-size: .78rem; letter-spacing: .04em; color: var(--ink-60); min-height: 1.4rem; margin: .6rem 0; }
.mch-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin: .6rem 0; }
.mch-temp { display: inline-flex; align-items: center; gap: .5rem; font-family: var(--utility); font-size: .78rem; }
.mch-temp input[type="range"] { accent-color: #E63312; width: 9rem; }
.mch-temp-val { font-variant-numeric: tabular-nums; min-width: 2ch; }
.mch-tally { font-family: var(--utility); font-size: .85rem; font-variant-numeric: tabular-nums; min-height: 1.2rem; }
.dp-label { font-family: var(--utility); font-size: 11px; letter-spacing: .14em; fill: #0A0A0A; }
.dp-label-red { fill: #E63312; }
.ev-panel-title { font-family: var(--grot); font-size: 15px; font-weight: 700; fill: #0A0A0A; }
.ev-val { font-family: var(--utility); font-size: 13px; fill: #0A0A0A; font-variant-numeric: tabular-nums; }
.ev-name { font-family: var(--utility); font-size: 11px; letter-spacing: .06em; fill: #5A5A5A; }
.ev-axis { font-family: var(--utility); font-size: 11px; fill: #5A5A5A; }
.ev-legend { font-family: var(--utility); font-size: .78rem; }
.vm-title { font-weight: 700; font-size: 1.1rem; margin: 1rem 0 .4rem; }
.vm-col-label { font-family: var(--utility); font-size: 12px; letter-spacing: .18em; fill: #0A0A0A; }
.vm-col-red { fill: #E63312; }
.vm-num { font-family: var(--utility); font-size: 11px; fill: #FFFFFF; }

.attest-input {
  font-family: var(--grot); font-size: 1.1rem; padding: .5rem .7rem;
  border: var(--hair); width: 100%; max-width: 24rem; background: var(--paper); color: var(--ink);
}
.fork-row { border-top: var(--hair-soft); padding: 1rem 0; }
.fork-row:first-child { border-top: none; }
.fork-user-line { color: var(--ink-60); margin: .5rem 0 0; }
.fork-builder-line { border-left: 3px solid var(--red); padding-left: .8rem; margin: .5rem 0 0; }

.fact-unit { font-size: .4em; font-weight: 700; letter-spacing: .04em; color: var(--ink-60); }
.footer-nav { font-size: .88rem; margin: .2rem 0 .8rem; }
.footer-nav a { color: var(--ink); }

.hero-live {
  display: block; margin: 2rem 0 0; padding: .9rem 0; border-top: var(--hair-soft); border-bottom: var(--hair-soft);
  font-family: var(--utility); font-size: .95rem; min-height: 3.6rem;
}
.hero-live-label { display: block; font-size: .66rem; letter-spacing: .26em; text-transform: uppercase; color: var(--ink-60); margin-bottom: .35rem; }
.hero-live-line { font-weight: 400; color: var(--ink); }
.hero-live-cands { margin-left: .6rem; }
.hero-cand { color: var(--ink-30); margin-right: .55rem; }
.hero-cand.is-pick { color: var(--red); font-weight: 700; }
.lx-item h3 { margin-top: 1.2rem; }
.lx-sources { margin-top: 1.4rem; }

.doors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: var(--hair); border-bottom: var(--hair); margin: 1.6rem 0; }
.door { display: grid; align-content: start; gap: .7rem; padding: 1.6rem 1.4rem 1.6rem 0; text-decoration: none; color: var(--ink); border-right: var(--hair-soft); }
.door:last-child { border-right: none; }
.door + .door { padding-left: 1.4rem; }
.door-who { font-family: var(--utility); font-size: .7rem; letter-spacing: .26em; text-transform: uppercase; color: var(--red); }
.door-line { font-size: .98rem; line-height: 1.5; }
.door-cta { font-weight: 700; }
.door:hover .door-cta { color: var(--red); }
@media (max-width: 640px) { .doors { grid-template-columns: 1fr; } .door { border-right: none; border-bottom: var(--hair-soft); padding-left: 0; } .door:last-child { border-bottom: none; } }

/* ---------- footer ---------- */
.site-footer { border-top: var(--hair); margin-top: 2rem; padding: 2rem 0 2.6rem; }
.site-footer p { font-size: .85rem; color: var(--ink-60); margin: 0 0 .4rem; max-width: 44rem; }
.footer-brand { font-weight: 700; letter-spacing: .22em; color: var(--ink); font-size: .95rem; }
.footer-brand::after { content: "."; color: var(--red); }

/* ---------- 404 ---------- */
.notfound { text-align: left; padding: 5rem 0; }
.notfound .bell-mark { display: none; }
.notfound h1 { max-width: 14ch; }

@media (max-width: 640px) {
  .facts-grid { grid-template-columns: 1fr; }
  .fact { border-right: none; border-bottom: var(--hair-soft); padding-left: 0; }
  .fact + .fact { padding-left: 0; }
  .journey-card { grid-template-columns: 3.2rem 1fr; }
  .journey-state { grid-column: 2; margin-top: .3rem; }
  .critter-stage { grid-template-columns: 1fr; }
  .pred-option { grid-template-columns: 5.5rem 1fr 3rem; }
}