/* Rebuilt courses (assets/rebuilt/engine.mjs). Scoped to .rb-course.
   Subject colour comes from --rb-dominant / --rb-support / --rb-deep (set per subject on <main>).
   Plain hex/rgba colours only: the learner guardrail repaints colours it cannot read. */

.rb-course {
  --ink: #26262B; --ink-2: #474649; --ink-3: #585758; --ink-4: #696767;
  --cream: #FFFCF6; --paper: #FDE9C8; --papier-2: #FDEDD1; --line: #E2D5BC;
  --accent: var(--rb-deep); --surligne: #F9DA63;
  --corail: #FD7666; --emeraude: #0FBC53; --jaune: #F6CC24; --violet: #9267EA; --rose: #FDC8E9; --lime: #B0EE0B;
  --role-corail: #B05951; --role-emeraude: #1E5939; --role-violet: #825DCD;
  --fond-corail: #FFECE5; --fond-emeraude: #E2F4E2; --fond-jaune: #FEF6DD; --fond-violet: #F2EAF5;
  color: var(--ink);
}
.rb-course .rb-stage { display: grid; gap: 24px; margin-top: 18px; }
.rb-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.rb-course .rb-module-nav button.is-current i { background: var(--rb-dominant); color: #fff; }
.rb-course .rb-module-nav button i { background: var(--rb-support); color: var(--rb-deep); }

/* buttons */
.rb-course .rb-btn { display: inline-flex; min-height: 48px; padding: 0 20px; border: 1.5px solid rgba(38,38,43,.14); border-radius: 16px 19px 15px 18px; background: #fff; color: var(--ink); font: 850 15px/1 var(--font-body); align-items: center; gap: 10px; cursor: pointer; }
.rb-btn:hover { background: var(--rb-support); }
.rb-course .rb-btn--primary { border-color: transparent; background: var(--rb-deep); color: #fff; letter-spacing: 0; }
.rb-course .rb-btn--primary:hover { background: var(--ink); }
.rb-btn--primary b { display: grid; width: 32px; height: 32px; border-radius: 10px; background: rgba(255,255,255,.88); color: var(--rb-deep); place-items: center; }
.rb-btn[disabled], .rb-btn[aria-disabled="true"] { opacity: .45; }
.rb-btn:focus-visible, .rb-course button:focus-visible { outline: 3px solid var(--rb-deep); outline-offset: 2px; }

/* loading */
.rb-loading { display: grid; min-height: 50vh; place-content: center; text-align: center; gap: 10px; }
.rb-loading span { color: var(--rb-deep); font: 850 12px/1 var(--font-body); letter-spacing: .14em; text-transform: uppercase; }
.rb-loading strong { font: 900 clamp(34px, 4vw, 56px)/1 var(--font-display); letter-spacing: -.04em; }

/* 01 welcome */
.rb-welcome { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(280px, 1fr); gap: 22px; }
.rb-welcome__hero { position: relative; display: block; min-height: 480px; padding: clamp(28px, 4vw, 54px); border-radius: 44px 54px 42px 50px; overflow: hidden; background: var(--rb-support); isolation: isolate; }
.rb-welcome__hero::before { position: absolute; inset: 0; z-index: -1; background-image: radial-gradient(rgba(255,255,255,.75) 2.2px, transparent 2.4px); background-size: 26px 26px; content: ""; }
.rb-welcome__copy { position: relative; z-index: 2; max-width: 56%; }
.rb-welcome__copy > span { color: var(--rb-deep); font: 850 12px/1 var(--font-body); letter-spacing: .14em; }
.rb-welcome__copy h1 { margin: 14px 0 12px; font: 900 clamp(36px, 4.2vw, 66px)/.88 var(--font-display); letter-spacing: -.055em; text-transform: uppercase; text-wrap: balance; }
.rb-welcome__sub { max-width: 520px; margin: 0 0 24px; color: var(--ink-2); font: 700 17px/1.45 var(--font-body); }
.rb-welcome__art { position: absolute; z-index: 1; top: 26px; right: 22px; width: min(44%, 320px); opacity: .95; }
.rb-welcome__teacher { position: absolute; z-index: 1; right: 8%; bottom: 0; width: min(30%, 260px); max-height: 66%; object-fit: contain; object-position: bottom; pointer-events: none; }
.rb-welcome__mission { display: grid; padding: 28px; border: 1px solid rgba(38,38,43,.1); border-radius: 30px 36px 28px 34px; background: #fff; align-content: start; gap: 18px; }
.rb-welcome__mission > span { color: var(--rb-deep); font: 850 11px/1 var(--font-body); letter-spacing: .14em; }
.rb-welcome__mission > p { margin: 0; font: 700 17px/1.5 var(--font-body); }
.rb-progress > div { display: flex; justify-content: space-between; align-items: end; }
.rb-progress span { color: var(--rb-deep); font: 850 11px/1 var(--font-body); letter-spacing: .12em; }
.rb-progress strong { color: var(--rb-dominant); font: 900 44px/1 var(--font-display); }
.rb-progress > i { display: block; height: 10px; margin: 12px 0; border-radius: 99px; background: #EEEAF4; position: relative; overflow: hidden; }
.rb-progress > i::after { position: absolute; inset: 0 auto 0 0; width: var(--p); border-radius: 99px; background: var(--rb-dominant); content: ""; }
.rb-progress ol { display: flex; margin: 0; padding: 0; list-style: none; flex-wrap: wrap; gap: 6px; }
.rb-progress ol button { width: 34px; height: 30px; border: 0; border-radius: 9px; background: #F1EFF4; color: var(--ink-3); font: 800 12px/1 var(--font-body); cursor: pointer; }
.rb-progress ol .is-done button { background: var(--rb-support); color: var(--rb-deep); }
.rb-shortcuts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.rb-shortcuts button { display: grid; min-height: 150px; padding: 26px; border: 1px solid rgba(38,38,43,.08); border-radius: 30px 36px 28px 34px; grid-template-columns: 1fr auto auto; align-items: center; gap: 16px; text-align: left; cursor: pointer; }
.rb-shortcuts .is-lab { background: #EFE8FF; } .rb-shortcuts .is-cards { background: #F1F8DE; } .rb-shortcuts .is-eval { background: #FFE9DE; }
.rb-shortcuts strong { display: block; font: 900 30px/.95 var(--font-display); letter-spacing: -.03em; text-transform: uppercase; }
.rb-shortcuts small { display: block; margin-top: 8px; font: 750 14px/1.3 var(--font-body); }
.rb-shortcuts i { display: grid; width: 76px; height: 76px; border-radius: 24px 28px 22px 26px; background: var(--rb-dominant); color: #fff; font: 900 30px/1 var(--font-body); font-style: normal; place-items: center; }
.rb-shortcuts b { font-size: 22px; }

/* 01 cards */
.rb-card, .rb-question, .rb-vf, .rb-flash, .rb-summary, .rb-guide, .rb-eval, .rb-lab-welcome { padding: clamp(22px, 3vw, 40px); border: 1px solid rgba(38,38,43,.08); border-radius: 36px 44px 34px 40px; background: #fff; box-shadow: 0 18px 50px rgba(38,38,43,.06); }
.rb-card__head, .rb-question > header, .rb-flash > header { display: flex; margin-bottom: 18px; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.rb-card__head > span, .rb-question > header span, .rb-flash > header span, .rb-vf > header span, .rb-summary > header span, .rb-guide > header span, .rb-eval > header span { color: var(--rb-deep); font: 850 12px/1 var(--font-body); letter-spacing: .14em; }
.rb-card__dots { display: flex; gap: 6px; }
.rb-course .rb-card__dots button { flex: none; width: 14px; height: 14px; min-width: 0; min-height: 0; padding: 0; border: 0; border-radius: 50%; background: #E9E5EF; cursor: pointer; }
.rb-card__dots .is-done { background: var(--rb-support); box-shadow: inset 0 0 0 2px var(--rb-dominant); }
.rb-card__dots .is-current { width: 34px; border-radius: 99px; background: var(--rb-dominant); }
.rb-card__body, .rb-question__body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(20px, 3vw, 44px); align-items: start; }
.rb-card__body > :only-child, .rb-question__body > :only-child { grid-column: 1 / -1; }
.rb-dit { margin: 0; font: 650 clamp(18px, 1.6vw, 22px)/1.55 var(--font-body); animation: rb-rise .5s ease both; }
.rb-points { display: grid; margin: 20px 0 0; padding: 0; list-style: none; gap: 10px; }
.rb-points li { position: relative; padding: 12px 14px 12px 40px; border-radius: 14px 17px 13px 16px; background: var(--rb-support); font: 700 16px/1.4 var(--font-body); animation: rb-rise .45s ease both; }
.rb-points li:nth-child(2) { animation-delay: .08s; } .rb-points li:nth-child(3) { animation-delay: .16s; } .rb-points li:nth-child(4) { animation-delay: .24s; } .rb-points li:nth-child(5) { animation-delay: .32s; }
.rb-points li::before { position: absolute; top: 15px; left: 15px; width: 12px; height: 12px; border-radius: 4px; background: var(--rb-dominant); content: ""; }
.rb-key { padding: 0 3px; border-radius: 5px; background: #FBE7A1; color: inherit; }
.rb-role { padding: 0 2px; border-bottom: 3px solid currentColor; font-weight: 800; }
.rb-role-date { color: #8a5a12; } .rb-role-acteur { color: #5b3cc4; } .rb-role-cause { color: #b23a2c; } .rb-role-consequence { color: #0a7a37; }
.rb-role-lieu { color: #1d4f9c; } .rb-role-nombre, .rb-role-chiffre { color: #5b3cc4; } .rb-role-unite { color: #0a7a37; }
.rb-alt { margin-top: 18px; }
.rb-alt button { padding: 0; border: 0; background: none; color: var(--rb-deep); font: 850 14px/1.2 var(--font-body); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.rb-alt p { margin: 10px 0 0; padding: 14px 16px; border-left: 4px solid var(--rb-dominant); border-radius: 0 14px 14px 0; background: #FAF8F4; font: 650 16px/1.5 var(--font-body); }
.rb-card__nav { display: flex; margin-top: 26px; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* visuals */
.rb-visual { min-width: 0; padding: 18px; border-radius: 24px 28px 22px 26px; background: #FFFCF6; border: 1px solid #EFE6D3; }
.rb-visual > :first-child { margin-top: 0 !important; }

/* 02 lab */
.rb-lab-welcome { display: grid; min-height: 320px; place-content: center; justify-items: center; gap: 28px; background: var(--rb-support); text-align: center; }
.rb-lab-welcome h1 { margin: 0; font: 900 clamp(38px, 4.6vw, 70px)/.9 var(--font-display); letter-spacing: -.05em; text-transform: uppercase; text-wrap: balance; }
.rb-lab-rail ol { display: flex; margin: 0; padding: 0; list-style: none; gap: 8px; flex-wrap: wrap; }
.rb-lab-rail button { min-width: 48px; height: 40px; padding: 0 12px; border: 0; border-radius: 12px 14px 11px 13px; background: #F1EFF4; color: var(--ink-3); font: 850 13px/1 var(--font-body); cursor: pointer; }
.rb-lab-rail .is-done { background: var(--rb-support); color: var(--rb-deep); }
.rb-lab-rail .is-current { background: var(--rb-dominant); color: #fff; }
.rb-demande { margin: 0 0 18px; font: 850 clamp(20px, 1.8vw, 26px)/1.35 var(--font-body); }
.rb-options { display: grid; margin-top: 20px; gap: 10px; }
.rb-option { min-height: 54px; padding: 12px 18px; border: 2px solid rgba(38,38,43,.12); border-radius: 16px 19px 15px 18px; background: #fff; color: var(--ink); font: 750 16px/1.35 var(--font-body); text-align: left; cursor: pointer; }
.rb-option:hover:not([disabled]) { border-color: var(--rb-dominant); background: var(--rb-support); }
.rb-option.is-right { border-color: #0FBC53; background: #E5F8EB; animation: rb-pop .35s ease; }
.rb-option.is-wrong { border-color: #FD7666; background: #FFECE5; animation: rb-shake .35s ease; }
.rb-option.is-dim { opacity: .45; }
.rb-feedback { margin-top: 16px; padding: 16px 18px; border-radius: 18px 22px 17px 20px; font: 650 15px/1.5 var(--font-body); animation: rb-rise .3s ease both; }
.rb-feedback strong { display: block; margin-bottom: 4px; font-weight: 850; }
.rb-feedback p { margin: 0; }
.rb-feedback small { display: block; margin-top: 6px; color: var(--ink-3); }
.rb-feedback.is-right { background: #E5F8EB; } .rb-feedback.is-wrong { background: #FFECE5; } .rb-feedback.is-model { background: var(--rb-support); }
.rb-open, .rb-eval textarea { display: grid; gap: 8px; }
.rb-open span { color: var(--rb-deep); font: 850 11px/1 var(--font-body); letter-spacing: .12em; text-transform: uppercase; }
.rb-open textarea, .rb-eval textarea { width: 100%; padding: 14px; border: 1.5px solid rgba(38,38,43,.16); border-radius: 16px 19px 15px 18px; background: #fff; color: var(--ink); font: 650 16px/1.5 var(--font-body); resize: vertical; }
.rb-open + .rb-btn { margin-top: 12px; }
.rb-vf > header h2 { margin: 8px 0 18px; font: 900 clamp(26px, 2.6vw, 38px)/1 var(--font-display); letter-spacing: -.03em; }
.rb-vf ol { display: grid; margin: 0; padding: 0; list-style: none; gap: 14px; }
.rb-vf li { padding: 18px; border: 1.5px solid rgba(38,38,43,.1); border-radius: 20px 24px 19px 22px; }
.rb-vf li.is-right { border-color: #9be2b6; } .rb-vf li.is-wrong { border-color: #fbb4aa; }
.rb-vf li > p { margin: 0 0 12px; font: 750 17px/1.45 var(--font-body); }
.rb-vf__choices { display: flex; gap: 10px; }
.rb-vf__choices button { min-width: 96px; min-height: 44px; border: 2px solid rgba(38,38,43,.14); border-radius: 14px; background: #fff; font: 850 15px/1 var(--font-body); cursor: pointer; }
.rb-vf__choices button.is-chosen { border-color: var(--rb-dominant); background: var(--rb-support); }

/* 03 flashcards */
.rb-flash > header strong { color: var(--rb-deep); font: 850 14px/1 var(--font-body); }
.rb-flash__card { position: relative; display: block; width: min(100%, 640px); min-height: 300px; margin: 0 auto; padding: 0; border: 0; background: none; perspective: 1400px; cursor: pointer; }
.rb-flash__face { position: absolute; inset: 0; display: grid; padding: 34px; border-radius: 32px 38px 30px 36px; place-content: center; gap: 14px; text-align: center; backface-visibility: hidden; transition: transform .55s cubic-bezier(.2,.8,.2,1); }
.rb-flash__front { background: var(--rb-dominant); color: #fff; }
.rb-flash__back { background: var(--rb-support); color: var(--ink); transform: rotateY(180deg); }
.rb-flash__card.is-flipped .rb-flash__front { transform: rotateY(-180deg); }
.rb-flash__card.is-flipped .rb-flash__back { transform: rotateY(0); }
.rb-flash__face small { font: 850 11px/1 var(--font-body); letter-spacing: .14em; opacity: .85; }
.rb-flash__face strong { font: 900 clamp(22px, 2.4vw, 32px)/1.2 var(--font-display); letter-spacing: -.02em; }
.rb-flash__face em { font: 700 14px/1.4 var(--font-body); font-style: normal; opacity: .85; }
.rb-flash__judge { display: flex; min-height: 56px; margin-top: 18px; justify-content: center; gap: 12px; }

/* 04 summary */
.rb-summary { display: grid; gap: 20px; }
.rb-summary > header h1, .rb-guide > header h1, .rb-eval > header h1 { margin: 8px 0 0; font: 900 clamp(32px, 3.4vw, 52px)/.95 var(--font-display); letter-spacing: -.045em; }
.rb-summary article { padding: 22px; border-radius: 24px 28px 22px 26px; }
.rb-summary h2, .rb-guide h2 { margin: 0 0 14px; font: 900 22px/1 var(--font-display); letter-spacing: -.02em; }
.rb-summary__retenir { background: var(--rb-support); }
.rb-summary__retenir ol { display: grid; margin: 0; padding: 0; list-style: none; gap: 10px; }
.rb-summary__retenir li { display: grid; grid-template-columns: 40px 1fr; gap: 10px; align-items: start; animation: rb-rise .4s ease both; animation-delay: calc(var(--i) * .07s); }
.rb-summary__retenir i { display: grid; width: 34px; height: 34px; border-radius: 10px; background: var(--rb-dominant); color: #fff; font: 900 13px/1 var(--font-body); font-style: normal; place-items: center; }
.rb-summary__retenir p { margin: 6px 0 0; font: 700 16px/1.45 var(--font-body); }
.rb-summary__piege { background: #FFECE5; }
.rb-summary__piege p { margin: 0; font: 700 16px/1.5 var(--font-body); }
.rb-summary__mots { background: #FAF8F4; }
.rb-summary__mots dl { display: grid; margin: 0; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.rb-summary__mots div { padding: 14px; border-radius: 16px; background: #fff; }
.rb-summary__mots dt { color: var(--rb-deep); font: 900 16px/1.2 var(--font-display); }
.rb-summary__mots dd { margin: 6px 0 0; font: 650 14px/1.45 var(--font-body); }

/* 05 guide */
.rb-guide { display: grid; gap: 22px; }
.rb-guide > header p { margin: 8px 0 0; color: var(--ink-3); font: 700 16px/1.45 var(--font-body); }
.rb-guide article { padding: 22px; border-radius: 24px; background: #FAF8F4; }
.rb-guide h3 { margin: 18px 0 10px; font: 900 18px/1 var(--font-display); }
.rb-guide ol { display: grid; margin: 0; padding: 0; list-style: none; gap: 12px; }
.rb-guide__plan li { display: grid; grid-template-columns: 40px 1fr; gap: 10px; }
.rb-guide__plan i { display: grid; width: 32px; height: 32px; border-radius: 10px; background: var(--rb-support); color: var(--rb-deep); font: 900 12px/1 var(--font-body); font-style: normal; place-items: center; }
.rb-guide p { margin: 0; font: 650 15px/1.5 var(--font-body); }
.rb-guide small { display: block; margin-top: 4px; color: var(--ink-3); font: 650 13px/1.4 var(--font-body); }
.rb-guide__answer { margin-top: 6px !important; padding: 8px 12px; border-radius: 12px; background: #E5F8EB; }
.rb-guide__source code { font-size: 13px; }

/* 06 evaluation */
.rb-eval { display: grid; gap: 22px; }
.rb-eval > header p { margin: 10px 0 0; font: 700 16px/1.45 var(--font-body); color: var(--ink-3); }
.rb-eval__list { display: grid; margin: 0; padding: 0; list-style: none; gap: 18px; }
.rb-eval__list > li { display: grid; padding: 20px; border: 1.5px solid rgba(38,38,43,.1); border-radius: 22px 26px 21px 24px; gap: 12px; }
.rb-eval__list header { display: grid; grid-template-columns: 40px 1fr auto; gap: 12px; align-items: start; }
.rb-eval__list header i { display: grid; width: 36px; height: 36px; border-radius: 11px; background: var(--rb-dominant); color: #fff; font: 900 15px/1 var(--font-body); font-style: normal; place-items: center; }
.rb-eval__list header strong { font: 800 17px/1.4 var(--font-body); }
.rb-eval__list header small { padding: 6px 10px; border-radius: 10px; background: var(--rb-support); color: var(--rb-deep); font: 850 12px/1 var(--font-body); white-space: nowrap; }
.rb-eval__score { display: flex; gap: 8px; flex-wrap: wrap; }
.rb-eval__score button { width: 46px; height: 42px; border: 2px solid rgba(38,38,43,.14); border-radius: 12px; background: #fff; font: 900 16px/1 var(--font-body); cursor: pointer; }
.rb-eval__score button.is-chosen { border-color: transparent; background: var(--rb-dominant); color: #fff; }
.rb-eval__foot { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.rb-eval__total span { display: block; color: var(--rb-deep); font: 850 11px/1 var(--font-body); letter-spacing: .14em; }
.rb-eval__total strong { font: 900 54px/1 var(--font-display); color: var(--rb-dominant); }

/* topic motifs (hero illustrations), drawn in the subject colour */
.rb-motif { width: 100%; height: auto; overflow: visible; }
.rb-motif text { font-family: var(--font-body); text-anchor: middle; }
.rb-m-panel { fill: #fff; stroke: var(--rb-dominant); stroke-width: 2.5; }
.rb-m-paper { fill: #FFFCF6; stroke: var(--rb-deep); stroke-width: 2; }
.rb-m-label { font-size: 9px; font-weight: 800; fill: var(--rb-deep); }
.rb-m-title { font-size: 13px; font-weight: 900; fill: var(--rb-deep); letter-spacing: .04em; }
.rb-m-num { font-size: 15px; font-weight: 900; fill: #fff; }
.rb-m-cell { fill: var(--rb-support); }
.rb-m-digit { font-size: 20px; font-weight: 900; fill: var(--rb-deep); animation: rb-digit .6s cubic-bezier(.3,1.4,.5,1) both; animation-delay: calc(var(--i) * .09s + .2s); }
.rb-m-sep { stroke: var(--rb-dominant); stroke-width: 2; stroke-dasharray: 4 4; }
.rb-m-dot { fill: rgba(38,38,43,.22); }
.rb-m-stroke { stroke: var(--ink); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 220; stroke-dashoffset: 220; animation: rb-draw 1.1s ease forwards; animation-delay: calc(var(--i) * .45s + .2s); }
.rb-m-accent { stroke: var(--rb-dominant); }
.rb-m-square { fill: var(--rb-support); stroke: var(--rb-deep); stroke-width: 2; opacity: 0; animation: rb-fade .5s ease forwards; animation-delay: 1.2s; }
.rb-m-right { fill: none; stroke: var(--rb-deep); stroke-width: 2; opacity: 0; animation: rb-fade .4s ease forwards; animation-delay: 1.6s; }
.rb-m-tick { stroke: var(--rb-deep); stroke-width: 1.5; }
.rb-m-slider { animation: rb-slide 3.2s ease-in-out infinite alternate; }
.rb-m-marker { fill: var(--rb-dominant); }
.rb-m-liquid { fill: var(--rb-dominant); opacity: .55; animation: rb-fill 2.4s ease forwards; }
.rb-m-path { fill: none; stroke: var(--rb-support); stroke-width: 10; stroke-linecap: round; }
.rb-m-stone circle { fill: #E9E5EF; animation: rb-light .4s ease forwards; animation-delay: calc(var(--i) * .5s + .3s); }
.rb-m-ribbon { stroke: var(--rb-deep); stroke-width: 3; stroke-dasharray: 220; stroke-dashoffset: 220; animation: rb-draw 1.2s ease forwards .2s; }
.rb-m-event circle { fill: var(--rb-dominant); opacity: 0; animation: rb-fade .35s ease forwards; animation-delay: calc(var(--i) * .3s + .9s); }
.rb-m-event text { opacity: 0; animation: rb-fade .35s ease forwards; animation-delay: calc(var(--i) * .3s + 1s); }
.rb-m-stamp { fill: none; stroke: #b23a2c; stroke-width: 3; stroke-dasharray: 4 3; animation: rb-stamp .5s ease both 1.8s; }
.rb-m-land { fill: var(--rb-support); stroke: var(--rb-deep); stroke-width: 2; }
.rb-m-road { fill: none; stroke: #fff; stroke-width: 7; stroke-linecap: round; }
.rb-m-travel { fill: none; stroke: var(--rb-dominant); stroke-width: 3; stroke-dasharray: 6 7; animation: rb-travel 1.6s linear infinite; }
.rb-m-town circle { fill: var(--rb-deep); }
.rb-m-grain { fill: var(--rb-deep); animation: rb-swirl 3s ease-in-out infinite alternate; animation-delay: calc(var(--i) * -.2s); }

/* animations on the lesson visuals, one family per topic */
.rb-anim .v2-figure .seg { stroke-dasharray: 160; stroke-dashoffset: 160; animation: rb-draw 1s ease forwards; }
.rb-anim .v2-figure .seg:nth-of-type(2) { animation-delay: .25s; } .rb-anim .v2-figure .seg:nth-of-type(3) { animation-delay: .5s; } .rb-anim .v2-figure .seg:nth-of-type(n+4) { animation-delay: .75s; }
.rb-anim .v2-figure .pt, .rb-anim .v2-figure .lbl { opacity: 0; animation: rb-fade .4s ease forwards .9s; }
.rb-anim .v2-grille tbody tr { animation: rb-rise .4s ease both; }
.rb-anim .v2-grille tbody tr:nth-child(2) { animation-delay: .08s; } .rb-anim .v2-grille tbody tr:nth-child(3) { animation-delay: .16s; } .rb-anim .v2-grille tbody tr:nth-child(4) { animation-delay: .24s; } .rb-anim .v2-grille tbody tr:nth-child(n+5) { animation-delay: .32s; }
.rb-anim-placeValue .v2-pose span, .rb-anim-measure .v2-pose span { display: inline-block; animation: rb-digit .5s cubic-bezier(.3,1.4,.5,1) both; }
.rb-anim .v2-duo > div { animation: rb-rise .45s ease both; }
.rb-anim .v2-duo > div + div { animation-delay: .15s; }
.rb-anim .fr-ev, .rb-anim .fr-periode { animation: rb-fade .5s ease both; }
.rb-anim .fr-ev:nth-of-type(2n) { animation-delay: .2s; } .rb-anim .fr-ev:nth-of-type(3n) { animation-delay: .4s; }
.rb-anim .doc-cadre { animation: rb-rise .5s ease both; }
.rb-anim-route .v2-globe path, .rb-anim-route .v2-carte path { animation: rb-fade .8s ease both; }
.rb-anim .exp-etapes li { animation: rb-rise .4s ease both; }

@keyframes rb-rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes rb-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes rb-draw { to { stroke-dashoffset: 0; } }
@keyframes rb-digit { from { opacity: 0; transform: translateY(-14px) scale(.6); } to { opacity: 1; transform: none; } }
@keyframes rb-pop { 50% { transform: scale(1.03); } }
@keyframes rb-shake { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }
@keyframes rb-slide { from { transform: translateX(0); } to { transform: translateX(196px); } }
@keyframes rb-fill { from { transform: translateY(0); } to { transform: translateY(-78px); } }
@keyframes rb-light { to { fill: var(--rb-dominant); } }
@keyframes rb-stamp { from { opacity: 0; transform: scale(1.6); transform-origin: 190px 92px; } to { opacity: 1; transform: none; } }
@keyframes rb-travel { to { stroke-dashoffset: -26; } }
@keyframes rb-swirl { to { transform: translate(6px, -8px); } }

@media (prefers-reduced-motion: reduce) {
  .rb-course *, .rb-course *::before, .rb-course *::after { animation: none !important; transition: none !important; stroke-dashoffset: 0 !important; opacity: 1; }
}
@media (max-width: 900px) {
  .rb-welcome, .rb-card__body, .rb-question__body { grid-template-columns: 1fr; }
  .rb-welcome__hero { grid-template-columns: 1fr; min-height: 0; }
  .rb-welcome__copy { max-width: none; }
  .rb-welcome__art { position: static; width: 70%; margin: 18px 0 0 auto; }
  .rb-welcome__teacher { display: none; }
  .rb-shortcuts { grid-template-columns: 1fr; }
}

/* visual library (from the written lessons' own renderer, scoped) */
.rb-visual .v2-figure { margin: 18px 0 6px; }
.rb-visual .v2-figure figcaption { font: 600 10px/1.4 var(--font-body); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-4); margin-bottom: 8px; }
.rb-visual .v2-figure svg { width: 100%; max-width: 340px; aspect-ratio: 1; display: block; }
.rb-visual .v2-figure .seg { stroke: var(--ink); stroke-width: .9; stroke-linecap: round; fill: none; }
.rb-visual .v2-figure .seg.cache { stroke-dasharray: 3 2.4; stroke-width: .7; opacity: .5; }
.rb-visual .v2-figure .seg.accent { stroke: var(--accent); stroke-width: 1.1; }
.rb-visual .v2-figure .pt { fill: var(--ink); }
.rb-visual .v2-figure .lbl { font: 600 5px var(--font-body); fill: var(--ink-3); }
.rb-visual .v2-horloge svg { max-width: 300px; overflow: visible; }
.rb-visual .v2-horloge .cadran { fill: rgba(255,255,255,.55); stroke: var(--ink); stroke-width: 1; }
.rb-visual .v2-horloge .trait { stroke: var(--ink); stroke-width: .5; opacity: .45; }
.rb-visual .v2-horloge .trait.gros { stroke-width: 1; opacity: .85; }
.rb-visual .v2-horloge .chiffre {
  font: 600 6px var(--font-body); fill: var(--ink);
  text-anchor: middle; dominant-baseline: central;
  
  stroke: var(--cream); stroke-width: 1.8; paint-order: stroke fill;
}
.rb-visual .v2-horloge .minute { font: 600 4.2px var(--font-body); fill: var(--accent); dominant-baseline: central; }
.rb-visual .v2-horloge .aig { stroke: var(--ink); stroke-linecap: round; }
.rb-visual .v2-horloge .aig.heures { stroke-width: 2.6; }
.rb-visual .v2-horloge .aig.minutes { stroke-width: 1.5; }
.rb-visual .v2-horloge .aig.trotteuse { stroke: var(--accent); stroke-width: .7; }
.rb-visual .v2-horloge .axe { fill: var(--ink); }
.rb-visual .v2-grille-wrap { overflow-x: auto; margin: 16px 0 6px; }
.rb-visual .v2-grille { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.rb-visual .v2-grille th, .rb-visual .v2-grille td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; }
.rb-visual .v2-grille thead th { background: var(--rb-support); font: 600 11px var(--font-body); text-transform: uppercase; letter-spacing: .06em; }
.rb-visual .v2-grille tbody th { background: rgba(255,255,255,.6); font-weight: 600; }
.rb-visual .v2-grille-brute thead th { text-transform: none; letter-spacing: .02em; font-size: 12.5px; }
@media (max-width: 760px) {
.rb-visual .v2-grille { font-size: 12px; }
.rb-visual .v2-grille th, .rb-visual .v2-grille td { padding: 7px 6px; }
}
.rb-visual .v2-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0 6px; }
.rb-visual .v2-duo > div { border: 1px solid var(--line); border-radius: 14px; padding: 14px; background: white; }
.rb-visual .v2-duo h5 { font: 600 10px/1 var(--font-body); text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin: 0 0 8px; }
.rb-visual .v2-duo p { font-size: 14px; margin: 0 0 4px; color: var(--ink-2); }
.rb-visual .v2-cartes { margin: 0; padding-left: 20px; }
.rb-visual .v2-cartes li { margin-bottom: 12px; font-size: 14.5px; }
.rb-visual .v2-cartes strong { display: block; color: var(--ink); }
.rb-visual .v2-cartes span { display: block; color: var(--ink-3); }
.rb-visual .v2-cartes em { display: block; font-size: 13px; color: var(--ink-4); }
@media (max-width: 1100px) {
.rb-visual .compare .v2-figure svg { max-width: 240px; }
}
.rb-visual .v2-pose { margin: 18px 0 8px; overflow-x: auto; }
.rb-visual .v2-pose figcaption { font: 600 10px/1.4 var(--font-body); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-4); margin-bottom: 10px; }
.rb-visual .v2-pose table { border-collapse: collapse; font: 600 26px/1 var(--font-body); color: var(--ink); }
.rb-visual .v2-pose td { min-width: 1.5em; height: 1.5em; text-align: center; vertical-align: middle;
  padding: 0 .3em; white-space: nowrap; }
.rb-visual .v2-pose .pose-signe { width: 1.2em; color: var(--accent); }
.rb-visual .v2-pose .pose-rangs td { font: 600 11px var(--font-body); color: var(--ink-4); text-transform: uppercase; height: 1.6em; }
.rb-visual .v2-pose .pose-retenues td { font: 700 13px var(--font-body); color: var(--accent); height: 1.4em; }
.rb-visual .v2-pose .pose-dernier td { border-bottom: 2.5px solid var(--ink); }
.rb-visual .v2-pose .pose-resultat td { color: var(--accent); padding-top: 2px; }
.rb-visual .v2-pose .pose-rangs td:not(:first-child), .rb-visual .v2-pose .pose-retenues td:not(:first-child), .rb-visual .v2-pose tbody tr:not(.pose-rangs):not(.pose-retenues) td:not(.pose-signe) { border-left: 1px solid var(--line); }
.rb-visual .v2-pose tbody tr:last-child td { border-left-color: var(--line); }
.rb-visual .v2-pose .pose-classes td { font: 700 10px var(--font-body); color: var(--accent); text-transform: uppercase;
  letter-spacing: .08em; height: 1.9em; border-bottom: 1px solid var(--line); }
.rb-visual .v2-pose .pose-classes td:not(:first-child) { border-left: 2px solid var(--ink); }
.rb-visual .v2-pose .pose-classes td:first-child { border: 0; }
.rb-visual .v2-potence { margin: 18px 0 8px; }
.rb-visual .v2-potence figcaption { font: 600 10px/1.4 var(--font-body); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-4); margin-bottom: 12px; }
.rb-visual .v2-potence .pot-cadre { display: inline-flex; align-items: flex-start; font: 600 26px/1.5 var(--font-body); color: var(--ink); }
.rb-visual .v2-potence .pot-gauche { text-align: right; padding-right: 12px; border-right: 2.5px solid var(--ink); min-width: 3.4em; }
.rb-visual .v2-potence .pot-droite { padding-left: 12px; min-width: 2.6em; }
.rb-visual .v2-potence .pot-diviseur { border-bottom: 2.5px solid var(--ink); padding-bottom: 2px; }
.rb-visual .v2-potence .pot-quotient { color: var(--accent); padding-top: 2px; }
.rb-visual .v2-potence .pot-retire { color: var(--accent); border-bottom: 1.5px solid var(--line); }
.rb-visual .v2-potence .pot-reste { font-weight: 700; }
@media (max-width: 760px) {
.rb-visual .v2-pose table { font-size: 19px; }
.rb-visual .v2-pose td { padding: 0 .2em; }
}
.rb-visual .v2-phrase { margin: 18px 0 6px; color: var(--ink); }
.rb-visual .v2-phrase figcaption { font: 600 10px/1.4 var(--font-body); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-4); margin-bottom: 8px; }
.rb-visual .v2-carte { margin: 18px 0 6px; }
.rb-visual .v2-carte figcaption { font: 600 10px/1.4 var(--font-body); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-4); margin-bottom: 8px; }
.rb-visual .ca-cadre { position: relative; background: var(--cream); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.rb-visual .ca-cadre svg { width: 100%; max-width: 520px; display: block; }
.rb-visual .ca-echelle { position: absolute; bottom: 8px; right: 10px; z-index: 1; font: 700 9.5px/1 var(--font-body); text-transform: uppercase; letter-spacing: .12em; color: var(--role-violet); background: white; border: 1px solid #D9CCF0; border-radius: 999px; padding: 5px 10px; }
.rb-visual .ca-zone { fill: #EEDBBD; stroke: var(--line); stroke-width: .7; stroke-linejoin: round; }
.rb-visual .ca-zone2 { fill: var(--fond-emeraude); stroke: var(--role-emeraude); stroke-width: .7; stroke-linejoin: round; }
.rb-visual .ca-eau { fill: var(--fond-violet); stroke: var(--role-violet); stroke-width: .7; stroke-linejoin: round; }
.rb-visual .ca-nom { font: 700 4.2px var(--font-body); fill: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; }
.rb-visual .ca-axe { fill: none; stroke: var(--ink-3); stroke-width: 1; stroke-linecap: round; stroke-dasharray: .2 2.2; }
.rb-visual .ca-flux { fill: none; stroke: var(--accent); stroke-width: 1.2; stroke-linecap: round; }
.rb-visual .ca-flux-pointe { fill: var(--accent); stroke: none; }
.rb-visual .ca-axe-nom { font: 700 3.6px var(--font-body); fill: var(--ink); paint-order: stroke; stroke: #ECE8F2; stroke-width: 1.9; }
.rb-visual .ca-ville-pt { fill: var(--ink); }
.rb-visual .ca-ici-pt { fill: var(--accent); }
.rb-visual .ca-ici-anneau { fill: none; stroke: var(--accent); stroke-width: .8; stroke-dasharray: 1.6 1.2; }
.rb-visual .ca-lbl { font: 600 4.4px var(--font-body); fill: var(--ink-2); paint-order: stroke; stroke: var(--cream); stroke-width: 1.4; }
.rb-visual .ca-lbl-ici { fill: var(--accent); font-weight: 700; }
.rb-visual .ca-legende { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 10px 0 0; padding: 0; }
.rb-visual .ca-legende li { display: inline-flex; align-items: center; gap: 7px; font: 500 12.5px/1.4 var(--font-sans, sans-serif); color: var(--ink); }
.rb-visual .ca-sw { width: 14px; height: 14px; border-radius: 4px; flex: none; }
.rb-visual .ca-sw-zone { background: #EEDBBD; border: 1px solid var(--line); }
.rb-visual .ca-sw-zone2 { background: var(--fond-emeraude); border: 1px solid var(--role-emeraude); }
.rb-visual .ca-sw-eau { background: var(--fond-violet); border: 1px solid var(--role-violet); }
.rb-visual .ca-sw-ville { background: radial-gradient(circle, var(--ink) 0 3.5px, transparent 4px); }
.rb-visual .ca-sw-ici { background: radial-gradient(circle, var(--accent) 0 3px, transparent 3.5px); border: 1.5px dashed var(--accent); border-radius: 50%; }
.rb-visual .ca-sw-axe { background: repeating-linear-gradient(90deg, var(--ink-3) 0 2px, transparent 2px 5px); height: 3px; border-radius: 2px; align-self: center; }
.rb-visual .ca-sw-flux { background: var(--accent); height: 3px; border-radius: 2px; align-self: center; clip-path: polygon(0 0, 72% 0, 72% -140%, 100% 50%, 72% 240%, 72% 100%, 0 100%); }
.rb-visual .compare .ca-cadre svg { max-width: 420px; }
.rb-visual .v2[data-classe="CP"]  .ca-legende li { font-size: 15px; }
.rb-visual .v2[data-classe="CE1"] .ca-legende li { font-size: 14px; }
.rb-visual .v2[data-classe="CE2"] .ca-legende li { font-size: 13.5px; }
.rb-visual .v2-globe .ca-cadre, .rb-visual .v2-paysage .ca-cadre { background: #EEF4F0; }
.rb-visual .gl-ocean { fill: var(--fond-violet); stroke: var(--role-violet); stroke-width: .5; }
.rb-visual .gl-terre { fill: #EEDBBD; stroke: var(--line); stroke-width: .45; stroke-linejoin: round; }
.rb-visual .gl-limbe { fill: none; stroke: #7FAE90; stroke-width: .9; }
.rb-visual .gl-equateur { fill: none; stroke: var(--role-corail); stroke-width: .7; stroke-dasharray: 2.4 1.8; }
.rb-visual .gl-repere { font: 700 3.4px var(--font-body); fill: var(--role-corail); text-transform: uppercase; letter-spacing: .06em; paint-order: stroke; stroke: var(--fond-violet); stroke-width: 1.2; }
.rb-visual .gl-pole { fill: var(--ink-2); }
.rb-visual .gl-nom { font-size: 3.6px; fill: var(--ink-3); paint-order: stroke; stroke: #EEDBBD; stroke-width: 1.2; }
.rb-visual .ca-rose-fond { fill: var(--cream); stroke: var(--line); stroke-width: .5; }
.rb-visual .ca-rose-nord { fill: var(--role-corail); }
.rb-visual .ca-rose-sud { fill: var(--ink-4); }
.rb-visual .ca-rose-lbl { font: 700 3.6px var(--font-body); fill: var(--ink-2); }
.rb-visual .ca-bati { fill: #DDD8C8; stroke: var(--line); stroke-width: .6; stroke-linejoin: round; }
.rb-visual .ca-rue { fill: none; stroke: var(--cream); stroke-width: 3.2; stroke-linecap: round; stroke-linejoin: round; }
.rb-visual .ca-sw-bati { background: #DDD8C8; border: 1px solid var(--line); }
.rb-visual .ca-sw-rue { background: #fff; border: 1px solid #CFCBBD; height: 8px; align-self: center; }
.rb-visual .ca-sw-terre { background: #EEDBBD; border: 1px solid var(--line); }
.rb-visual .ca-sw-equateur { background: repeating-linear-gradient(90deg, var(--role-corail) 0 3px, transparent 3px 5px); height: 3px; border-radius: 2px; align-self: center; }
.rb-visual .v2-echelles .ech-liste { list-style: none; margin: 0; padding: 0; }
.rb-visual .v2-echelles .ech-liste li { display: flex; flex-direction: column; gap: 3px; background: var(--cream); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; padding: 11px 14px; margin: 0 0 8px; }
.rb-visual .ech-nom { font: 700 10px/1 var(--font-body); text-transform: uppercase; letter-spacing: .12em; color: var(--accent); }
.rb-visual .ech-voit { font: 400 14px/1.5 var(--font-body); color: var(--ink); }
.rb-visual .v2-globe.gl-plat .ca-cadre svg { max-width: none; }
.rb-visual .v2-globe.gl-sphere .ca-cadre svg { max-width: 380px; margin: 0 auto; }
.rb-visual .gl-pays { stroke-width: .8; }
.rb-visual .gl-nom { fill: var(--ink-3); }
.rb-visual .v2-pages { margin: 20px 0 8px; }
.rb-visual .v2-pages figcaption {
  font: 600 11px/1.4 ui-monospace, monospace; letter-spacing: .09em;
  text-transform: uppercase; color: var(--corail); margin-bottom: 12px;
}
.rb-visual .gl-teinte { stroke: var(--line); stroke-width: .4; stroke-linejoin: round; }
.rb-visual .gl-t1 { fill: #2F6B45; }
.rb-visual .gl-t2 { fill: #7FAE90; }
.rb-visual .gl-t3 { fill: #D8E6DD; }
.rb-visual .ca-sw-t1 { background: #2F6B45; border: 1px solid #245235; }
.rb-visual .ca-sw-t2 { background: #7FAE90; border: 1px solid #5F8F71; }
.rb-visual .ca-sw-t3 { background: #D8E6DD; border: 1px solid #A9C4B3; }
.rb-visual .v2-frise .ca-cadre { background: var(--cream); }
.rb-visual .v2-frise .ca-cadre svg { max-width: none; }
.rb-visual .fr-bande { fill: #EFEADB; }
.rb-visual .fr-axe { stroke: var(--line); stroke-width: .5; }
.rb-visual .fr-periode { opacity: .85; }
.rb-visual .fr-p1 { fill: #E3D9B6; }
.rb-visual .fr-p2 { fill: var(--fond-emeraude); }
.rb-visual .fr-p3 { fill: var(--fond-violet); }
.rb-visual .fr-periode-nom {
  font: 700 2.9px ui-monospace, monospace; fill: var(--ink-2);
  text-transform: uppercase; letter-spacing: .1em;
}
.rb-visual .fr-tige { stroke: var(--line); stroke-width: .35; stroke-dasharray: 1 .9; }
.rb-visual .fr-point { fill: var(--ink); }
.rb-visual .fr-nom, .rb-visual .fr-cause { paint-order: stroke; stroke: var(--cream); stroke-width: 1.3; stroke-linejoin: round; }
.rb-visual .fr-nom { font: 500 3.5px var(--font-body); fill: var(--ink); }
.rb-visual .fr-an { font: 700 3.5px ui-monospace, monospace; fill: var(--role-violet); }
.rb-visual .fr-cause { font: 400 2.9px var(--font-body); fill: var(--role-corail); }
.rb-visual .fr-ev-cle .fr-point { fill: var(--corail); r: 1.8; }
.rb-visual .fr-ev-cle .fr-nom { font-weight: 700; }
.rb-visual .fr-ev-cle .fr-tige { stroke: var(--corail); stroke-dasharray: none; stroke-width: .45; }
.rb-visual .fr-vie { fill: #F0C5BF; }
.rb-visual .fr-vie-nom { font: 500 2.9px var(--font-body); fill: #8A4A42; }
.rb-visual .fr-tige-rep { stroke: #CFCBBD; stroke-width: .3; }
.rb-visual .fr-repere { font: 500 2.8px ui-monospace, monospace; fill: var(--ink-4); letter-spacing: .03em; }
.rb-visual .fr-borne { font: 700 2.8px ui-monospace, monospace; fill: var(--ink-4); letter-spacing: .06em; }
.rb-visual .v2-doc { margin: 18px 0 6px; }
.rb-visual .v2-doc figcaption {
  font: 600 10px/1.4 ui-monospace, monospace; text-transform: uppercase;
  letter-spacing: .1em; color: var(--ink-4); margin-bottom: 8px;
}
.rb-visual .doc-cadre {
  background: var(--cream); border: 1px solid var(--line);
  border-left: 4px solid var(--violet); border-radius: 12px; padding: 14px 16px;
}
.rb-visual .doc-nature {
  margin: 0 0 10px; font: 700 10px/1 ui-monospace, monospace;
  text-transform: uppercase; letter-spacing: .12em; color: var(--violet);
}
.rb-visual .doc-source {
  display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 0 0 12px;
  padding: 10px 12px; background: var(--papier-2); border-radius: 9px;
}
.rb-visual .doc-source > div { display: flex; flex-direction: column; gap: 2px; min-width: 120px; }
.rb-visual .doc-source dt {
  font: 700 9.5px/1 ui-monospace, monospace; text-transform: uppercase;
  letter-spacing: .1em; color: var(--ink-4);
}
.rb-visual .doc-source dd { margin: 0; font: 500 13.5px/1.45 var(--font-body); color: var(--ink); }
.rb-visual .doc-extrait {
  margin: 0 0 10px; padding: 10px 14px; border-left: 3px solid var(--line);
  font: italic 400 15px/1.65 var(--font-body); color: var(--ink);
}
.rb-visual .doc-decrit { margin: 0 0 10px; padding-left: 20px; }
.rb-visual .doc-decrit li { font: 400 14px/1.6 var(--font-body); color: var(--ink); margin-bottom: 3px; }
.rb-visual .doc-apprend { margin: 0 0 6px; font: 400 14px/1.6 var(--font-body); color: var(--ink); }
.rb-visual .doc-prudence {
  margin: 0; padding: 9px 12px; border-radius: 9px; background: #FDF1EF;
  font: 400 14px/1.6 var(--font-body); color: var(--role-corail);
}
.rb-visual .doc-apprend strong, .rb-visual .doc-prudence strong { font-weight: 700; }
.rb-visual .v2[data-classe="CM1"] .doc-source dd { font-size: 14px; }
.rb-visual .compare .doc-source > div { min-width: 100%; }
.rb-visual .v2-exp { margin: 18px 0 6px; }
.rb-visual .v2-exp figcaption {
  font: 600 10px/1.4 ui-monospace, monospace; text-transform: uppercase;
  letter-spacing: .1em; color: var(--ink-4); margin-bottom: 8px;
}
.rb-visual .exp-cadre {
  background: var(--cream); border: 1px solid var(--line);
  border-left: 4px solid var(--emeraude); border-radius: 12px; padding: 14px 16px;
}
.rb-visual .exp-nature {
  margin: 0 0 10px; font: 700 10px/1 ui-monospace, monospace;
  text-transform: uppercase; letter-spacing: .12em; color: var(--emeraude);
}
.rb-visual .exp-materiel {
  margin: 0 0 12px; padding: 10px 12px; background: var(--papier-2); border-radius: 9px;
}
.rb-visual .exp-materiel h5, .rb-visual .exp-facteur h5 {
  margin: 0 0 6px; font: 700 9.5px/1 ui-monospace, monospace;
  text-transform: uppercase; letter-spacing: .1em; color: var(--ink-4);
}
.rb-visual .exp-materiel ul { margin: 0; padding-left: 18px; }
.rb-visual .exp-materiel li { font: 400 14px/1.6 var(--font-body); color: var(--ink); }
.rb-visual .exp-securite {
  margin: 8px 0 0; font: 700 12.5px/1.5 var(--font-body); color: var(--role-corail);
}
.rb-visual .exp-etapes { margin: 0 0 12px; padding-left: 20px; }
.rb-visual .exp-etapes li {
  font: 400 14.5px/1.65 var(--font-body); color: var(--ink); margin-bottom: 4px;
}
.rb-visual .exp-etapes li::marker { color: var(--emeraude); font-weight: 700; }
.rb-visual .exp-facteur {
  margin: 0 0 12px; padding: 10px 12px; border-radius: 9px;
  background: var(--fond-violet); border: 1px solid #CFE3D6;
}
.rb-visual .exp-change { margin: 0; font: 700 14px/1.6 var(--font-body); color: #1F6438; }
.rb-visual .exp-identique { margin: 3px 0 0; font: 400 13px/1.55 var(--font-body); color: #4D6F59; }
.rb-visual .exp-prediction {
  margin: 0; padding: 11px 14px; border-radius: 9px; background: #FDF9EA;
  border: 1px dashed #D8C78F; font: 400 14.5px/1.65 var(--font-body); color: var(--ink);
}
.rb-visual .exp-prediction strong { font-weight: 700; }
.rb-visual .exp-volet { margin: 10px 0 0; }
.rb-visual .exp-volet > summary {
  cursor: pointer; list-style: none; padding: 9px 13px; border-radius: 9px;
  background: var(--ink); color: var(--tgo-creme);
  font: 600 10.5px/1.3 ui-monospace, monospace;
  text-transform: uppercase; letter-spacing: .1em;
}
.rb-visual .exp-volet > summary::-webkit-details-marker { display: none; }
.rb-visual .exp-volet > summary::before { content: "▸ "; }
.rb-visual .exp-volet[open] > summary::before { content: "▾ "; }
.rb-visual .exp-volet[open] > summary { border-radius: 9px 9px 0 0; }
.rb-visual .exp-voit, .rb-visual .exp-conclut {
  margin: 0; padding: 11px 14px; font: 400 14.5px/1.65 var(--font-body); color: var(--ink);
  border: 1px solid var(--line); border-top: 0;
}
.rb-visual .exp-voit { background: var(--fond-violet); }
.rb-visual .exp-conclut { background: var(--fond-emeraude); border-radius: 0 0 9px 9px; }
.rb-visual .exp-voit strong { font-weight: 700; color: var(--ink); }
.rb-visual .exp-conclut strong { font-weight: 700; color: var(--role-emeraude); }
/* Memory cards: the back gives room to the definition and the example (Saadia, 2026-10-03). */
main.rb-course .rb-memory-card { min-height: 460px; }
main.rb-course .rb-memory-card .kid-memory-card__front strong { font-size: clamp(40px, 5.4vw, 72px); line-height: 1; overflow-wrap: anywhere; }
main.rb-course .rb-memory-card .kid-memory-card__back { justify-content: flex-start; align-items: stretch; gap: 14px; padding: 26px 28px; text-align: left; }
main.rb-course .rb-memory-card .kid-memory-card__back strong { font-size: clamp(20px, 1.9vw, 26px); line-height: 1.3; letter-spacing: -.01em; font-weight: 800; }
main.rb-course .rb-memory-card .kid-memory-card__back em { display: grid; gap: 6px; margin: 0; padding: 14px 16px; border-radius: 18px; background: #ffffff; border: 2px solid var(--rb-support); color: #26262b; font-style: normal; font-size: clamp(16px, 1.45vw, 19px); line-height: 1.4; font-weight: 600; }
main.rb-course .rb-memory-card .kid-memory-card__back em span { font-size: 11px; letter-spacing: .14em; font-weight: 900; color: var(--rb-deep); }
main.rb-course .rb-memory-card .kid-memory-card__back b { align-self: center; margin-top: auto; }

/* Evaluation items: one block per question, options as chips, the correction under the item. */
main.rb-course .rb-eval-item { display: grid; gap: 10px; margin: 0 0 14px; padding: 14px 16px; border-radius: 16px; background: #ffffff; border: 1px solid #ebe5dc; }
main.rb-course .rb-eval-item.is-correct { border-color: #b9e6cc; }
main.rb-course .rb-eval-item.is-wrong { border-color: #f4c3bf; background: #fffaf9; }
main.rb-course .rb-eval-prompt { margin: 0; font-weight: 750; font-size: 17px; line-height: 1.45; color: #25212b; }
main.rb-course .rb-eval-prompt small { margin-left: 6px; font-size: 12px; font-weight: 800; color: #6b6475; white-space: nowrap; }
main.rb-course .rb-eval-options { display: flex; flex-wrap: wrap; gap: 8px; }
main.rb-course .rb-eval-options .adjectifs-evaluation-choice { white-space: normal; text-align: left; }
main.rb-course .rb-eval-fix { margin: 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; font-size: 15px; }
main.rb-course .rb-eval-fix > span { font-size: 11px; letter-spacing: .12em; font-weight: 900; }
main.rb-course .rb-eval-number { display: inline-flex; align-items: center; gap: 8px; }
main.rb-course .rb-eval-number input { width: 12ch; padding: 10px 12px; border: 2px solid #dcd5ca; border-radius: 12px; font: 750 18px/1.2 var(--font-body, inherit); font-variant-numeric: tabular-nums; }
main.rb-course .rb-eval-number.is-correct input { border-color: #1d9257; background: #eaf8f0; }
main.rb-course .rb-eval-number.is-wrong input { border-color: #d8463d; background: #fff1ef; }
main.rb-course .rb-eval-order { display: grid; gap: 10px; }
main.rb-course .rb-eval-order__picked { display: grid; gap: 6px; margin: 0; padding: 0; list-style: none; }
main.rb-course .rb-eval-order__picked li { display: flex; gap: 10px; align-items: center; padding: 8px 12px; border-radius: 12px; border: 2px dashed #dcd5ca; }
main.rb-course .rb-eval-order__picked li.is-filled { border-style: solid; border-color: var(--rb-dominant); }
main.rb-course .rb-eval-order__picked li.is-correct { border-style: solid; border-color: #1d9257; background: #eaf8f0; }
main.rb-course .rb-eval-order__picked li.is-wrong { border-style: solid; border-color: #d8463d; background: #fff1ef; }
main.rb-course .rb-eval-order__picked i { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 9px; background: var(--rb-support); color: var(--rb-deep); font-style: normal; font-weight: 900; }
main.rb-course .rb-eval-order__pool { display: flex; flex-wrap: wrap; gap: 8px; }
main.rb-course .rb-eval-order__pool button { padding: 9px 14px; border-radius: 12px; border: 2px solid #dcd5ca; background: #ffffff; font: inherit; font-weight: 700; cursor: pointer; text-align: left; }
main.rb-course .rb-eval-order__pool button:hover { border-color: var(--rb-dominant); }
main.rb-course .rb-eval-order__undo { border-style: dashed !important; color: #6b6475; }
main.rb-course .rb-eval-match { display: grid; gap: 10px; }
main.rb-course .rb-eval-match__row { display: grid; grid-template-columns: minmax(120px, 220px) 1fr; gap: 10px; align-items: start; }
main.rb-course .rb-eval-match__row > strong { padding-top: 8px; }
@media (max-width: 640px) { main.rb-course .rb-eval-match__row { grid-template-columns: 1fr; } }

/* ---------- the lesson cover: its own drawn scene, as on the welcome card (2026-10-03) ---------- */
.rb-cover { position: relative; display: grid; place-items: center; width: 100%; aspect-ratio: 16 / 9; min-height: 160px; overflow: hidden; isolation: isolate; border-radius: 20px; padding: 10px; background: radial-gradient(circle, var(--cv-m) 1.2px, transparent 1.8px) 0 0 / 16px 16px, linear-gradient(150deg, #ffffff 0%, var(--cv-bg) 45%, var(--cv-l) 100%); border: 1px solid var(--cv-m); text-align: left; }
.rb-cover::after { content: ''; position: absolute; z-index: -1; width: 46%; aspect-ratio: 1; right: -12%; bottom: -30%; border-radius: 50%; background: var(--cv-b); opacity: .14; }
.rb-cover__copy { position: relative; z-index: 3; display: grid; gap: 6px; align-self: start; }
.rb-cover__copy small { font-size: 10px; font-weight: 900; letter-spacing: .12em; color: var(--rb-deep); }
.rb-cover__copy strong { display: block; font-size: clamp(16px, 1.45vw, 22px); line-height: 1.08; font-weight: 900; letter-spacing: -.02em; color: #23202a; hyphens: auto; overflow-wrap: break-word; }
.rb-cover__copy strong span::after { content: ' '; }
.rb-cover__copy small { white-space: nowrap; }
.rb-cover__copy strong em { font-style: normal; color: var(--rb-dominant); }
.rb-cover__art { position: relative; z-index: 2; display: block; width: min(80%, 320px); transition: transform .35s ease; }
.rb-cover-svg { display: block; width: 100%; height: auto; overflow: visible; }
.classroom-lesson-card:hover .rb-cover__art { transform: scale(1.04) rotate(-1.5deg); }
.rb-welcome__art .rb-cover-svg { width: 100%; }

/* cover animations */
.rb-cover-svg .cv-pop { transform-box: fill-box; transform-origin: center; animation: cv-pop .5s cubic-bezier(.2, 1.6, .4, 1) both; animation-delay: calc(var(--i, 0) * 90ms + 150ms); }
.rb-cover-svg .cv-grow { transform-box: fill-box; transform-origin: bottom; animation: cv-grow .35s ease both; animation-delay: calc(var(--i, 0) * 80ms); }
.rb-cover-svg .cv-grow-x { transform-box: fill-box; transform-origin: left; animation: cv-grow-x .6s ease both .2s; }
.rb-cover-svg .cv-float { animation: cv-float 3.2s ease-in-out infinite; animation-delay: calc(var(--i, 0) * 400ms); }
.rb-cover-svg .cv-twinkle { animation: cv-twinkle 2.4s ease-in-out infinite; }
.rb-cover-svg .cv-spin { transform-box: fill-box; transform-origin: center; animation: cv-spin 8s linear infinite; }
.rb-cover-svg .cv-draw { stroke-dasharray: 400; stroke-dashoffset: 400; animation: cv-draw 1s ease forwards; animation-delay: calc(var(--i, 0) * 350ms); }
.rb-cover-svg .cv-drop { animation: cv-drop .7s cubic-bezier(.3, 1.4, .5, 1) both; animation-delay: calc(var(--i, 0) * 180ms + 200ms); }
.rb-cover-svg .cv-wave { animation: cv-fade 1.6s ease-in-out infinite; animation-delay: calc(var(--i, 0) * 250ms); }
.rb-cover-svg .cv-roll { animation: cv-roll 4s ease-in-out infinite; }
.rb-cover-svg .cv-puff { animation: cv-puff 2.4s ease-in-out infinite; }
.rb-cover-svg .cv-write { animation: cv-write 2.6s ease-in-out infinite; }
.rb-cover-svg .cv-pulse { transform-box: fill-box; transform-origin: center; animation: cv-pulse 1.8s ease-in-out infinite; }
.rb-cover-svg .cv-unroll { transform-box: fill-box; transform-origin: left; animation: cv-grow-x 1s ease both .2s; }
.rb-cover-svg .cv-fill { transform-box: fill-box; transform-origin: bottom; animation: cv-grow 1.2s ease both; animation-delay: calc(var(--i, 0) * 250ms + 200ms); }
.rb-cover-svg .cv-swing { animation: cv-swing 3s ease-in-out infinite; }
.rb-cover-svg .cv-train { animation: cv-train 4s ease-in-out infinite; }
.rb-cover-svg .cv-swirl { transform-box: fill-box; animation: cv-swirl 3s ease-in-out infinite; animation-delay: calc(var(--i, 0) * 200ms); }
.rb-cover-svg .cv-flag { transform-box: fill-box; transform-origin: left bottom; animation: cv-float 2.6s ease-in-out infinite; }
@keyframes cv-pop { from { opacity: 0; transform: scale(.4); } to { opacity: 1; transform: none; } }
@keyframes cv-grow { from { transform: scaleY(0); } to { transform: none; } }
@keyframes cv-grow-x { from { transform: scaleX(0); } to { transform: none; } }
@keyframes cv-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }
@keyframes cv-twinkle { 0%, 100% { transform: scale(1) rotate(0); opacity: 1; } 50% { transform: scale(.6) rotate(40deg); opacity: .6; } }
@keyframes cv-spin { to { transform: rotate(360deg); } }
@keyframes cv-draw { to { stroke-dashoffset: 0; } }
@keyframes cv-drop { from { opacity: 0; transform: translateY(-24px); } to { opacity: 1; transform: none; } }
@keyframes cv-fade { 0%, 100% { opacity: .25; } 50% { opacity: 1; } }
@keyframes cv-roll { 0%, 100% { transform: translateX(-6px); } 50% { transform: translateX(6px); } }
@keyframes cv-puff { 0% { opacity: 0; transform: translate(0, 6px); } 40% { opacity: .9; } 100% { opacity: 0; transform: translate(-10px, -10px); } }
@keyframes cv-write { 0%, 100% { transform: translate(0, 0) rotate(0); } 50% { transform: translate(-8px, 2px) rotate(-4deg); } }
@keyframes cv-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.04); } }
@keyframes cv-swing { 0%, 100% { transform: rotate(-4deg); } 50% { transform: rotate(4deg); } }
@keyframes cv-train { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(-10px); } }
@keyframes cv-swirl { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(2px, -3px); } }
@media (prefers-reduced-motion: reduce) { .rb-cover-svg * { animation: none !important; stroke-dashoffset: 0 !important; } }

/* welcome card: title on the left, the lesson's drawing on the right (no teacher) */
.rb-welcome__hero { display: grid !important; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: center; gap: 18px; }
.rb-welcome__art.rb-cover-art { position: static !important; width: 100% !important; max-width: 380px; justify-self: center; margin: 0 !important; opacity: 1; }
.rb-welcome__teacher { display: none !important; }
@media (max-width: 760px) { .rb-welcome__hero { grid-template-columns: 1fr; } .rb-welcome__art.rb-cover-art { max-width: 300px; } }
.rb-welcome__hero .rb-welcome__copy { position: relative; z-index: 2; max-width: none !important; width: auto !important; min-width: 0; }
.rb-welcome__hero .rb-welcome__copy h1 { font-size: clamp(30px, 3.4vw, 50px) !important; overflow-wrap: break-word; hyphens: auto; }
.rb-welcome__hero .rb-welcome__copy > span { white-space: nowrap; }
.rb-welcome__hero .rb-welcome__copy .rb-btn { white-space: nowrap; }

/* the drawing sits on plain white inside the coloured card */
.rb-cover { background: #ffffff !important; border: 1px solid rgba(35, 32, 42, .08) !important; }
.rb-cover::after { display: none !important; }