:root{--navy:#1d627a;--navy-d:#14475a;--orange:#ff914c;--orange-l:#ffd9c2;--ink:#1f2937;--muted:#5b6b76;--line:#0000001f;--bg:#f7f9fa;--card:#fff;--radius:.9rem;--pad-block:2.4rem;--maxw:56rem;--ease:cubic-bezier(.2,.7,.2,1);--heading:"Segoe UI",system-ui,-apple-system,sans-serif}
.lesson{max-width:var(--maxw);font-family:var(--heading);color:var(--ink);margin:0 auto;padding:3rem 1.25rem 6rem;line-height:1.6}.block{padding-block:var(--pad-block)}.block__label{color:var(--orange);letter-spacing:.1em;text-transform:uppercase;margin:0 0 .6rem;font-size:.7rem;font-weight:700}.block p{margin:.2rem 0 .9rem}.block p:last-child{margin-bottom:0}.reveal{opacity:0;transition:opacity .6s var(--ease),transform .6s var(--ease);transform:translateY(14px)}.reveal.is-in{opacity:1;transform:none}.lesson__kicker{color:var(--orange);letter-spacing:.14em;text-transform:uppercase;margin:0 0 .4rem;font-size:.72rem;font-weight:800}.lesson__title{color:var(--navy);margin:0 0 .4rem;font-size:2rem;line-height:1.15}.lesson__meta{color:var(--muted);border-bottom:1px solid var(--line);margin:0 0 .2rem;padding-bottom:1.4rem;font-size:.9rem}.impact{background:linear-gradient(135deg,var(--navy),var(--navy-d));color:#fff;border-radius:var(--radius);text-align:center;padding:2.6rem 2rem;position:relative;overflow:hidden}.impact:before{content:"";background:var(--orange);width:6px;position:absolute;inset:0 auto 0 0}.impact__q{max-width:40ch;margin:0 auto;font-size:1.5rem;font-weight:800;line-height:1.3}.impact__q em{color:var(--orange);font-style:normal}.impact__by{color:#ffffffb0;margin:.9rem 0 0;font-size:.85rem}.figure{margin:0}.figure__img{border-radius:var(--radius);background:#e9eef1;width:100%;height:auto;display:block;box-shadow:0 6px 20px #1d627a1f}.figure__cap{color:var(--muted);text-align:center;margin:.7rem 0 0;font-size:.82rem}.accordion{border-top:1px solid var(--line)}.accordion__item{border-bottom:1px solid var(--line)}.accordion__header{border:0;cursor:pointer;width:100%;font:inherit;color:var(--navy);text-align:left;transition:border-color .3s var(--ease),background .3s var(--ease);background:0 0;border-inline-start:4px solid #0000;align-items:center;gap:1rem;padding:1.1rem 1rem;font-weight:700;display:flex}.accordion__header:hover{background:#1d627a08}.accordion__item.is-open>.accordion__header{border-inline-start-color:var(--orange)}.accordion__title{flex:1}.accordion__toggler{width:1.4rem;height:1.4rem;color:var(--orange);transition:transform .3s var(--ease);flex:none}.accordion__item.is-open .accordion__toggler{transform:rotate(180deg)}.accordion__panel{max-height:0;transition:max-height .35s var(--ease);overflow:hidden}.accordion__inner{color:var(--muted);padding:0 1rem 1.2rem 1.75rem}.cards{grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1rem;display:grid}.card{perspective:1200px;cursor:pointer;font:inherit;background:0 0;border:0;height:11rem;padding:0}.card__inner{width:100%;height:100%;transition:transform .6s var(--ease);transform-style:preserve-3d;position:relative}.card.is-flipped .card__inner{transform:rotateY(180deg)}.card__face{text-align:center;border-radius:var(--radius);backface-visibility:hidden;flex-direction:column;justify-content:center;align-items:center;padding:1.2rem;display:flex;position:absolute;inset:0;box-shadow:0 6px 20px #1d627a1f}.card__face--front{background:var(--card);border:1px solid var(--line);color:var(--navy)}.card__face--back{background:var(--navy);color:#fff;transform:rotateY(180deg)}.card__hint{letter-spacing:.08em;text-transform:uppercase;color:var(--orange);font-size:.62rem;font-weight:700;position:absolute;bottom:.6rem;right:.8rem}.card__q{margin:0;font-size:1.1rem;font-weight:800}.card__a{margin:0;font-size:.95rem}.gate{text-align:center;padding:.6rem 0}.gate__btn{background:var(--navy);color:#fff;font:inherit;cursor:pointer;transition:transform .2s var(--ease),background .2s;border:0;border-radius:999px;padding:.8rem 1.8rem;font-weight:700;box-shadow:0 6px 18px #1d627a40}.gate__btn:hover{background:var(--navy-d);transform:translateY(-2px)}.gate__hint{color:var(--muted);margin-top:.5rem;font-size:.75rem;display:block}.gate__revealed{text-align:left;margin-top:1.4rem}.gated{display:none}.gated.is-open{animation:dairia-fade .5s var(--ease);display:block}@keyframes dairia-fade{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.lg{border-radius:var(--radius);aspect-ratio:16/8;background:#e9eef1;position:relative;overflow:hidden}.lg__img{object-fit:cover;width:100%;height:100%;display:block}.lg__marker{background:var(--orange);color:#fff;cursor:pointer;width:2.2rem;height:2.2rem;animation:dairia-pop .5s var(--ease) forwards;animation-delay:calc(var(--i)*.15s);border:3px solid #fff;border-radius:50%;font-weight:800;position:absolute;transform:translate(-50%,-50%)scale(.01);box-shadow:0 4px 12px #0004}.lg__marker:hover,.lg__marker.is-active{background:var(--navy)}@keyframes dairia-pop{to{transform:translate(-50%,-50%)scale(1)}}.lg__tip{opacity:0;pointer-events:none;background:#fff;border-radius:.6rem;max-width:22rem;padding:.7rem 1rem;font-size:.9rem;transition:opacity .3s;position:absolute;bottom:1rem;left:50%;transform:translate(-50%);box-shadow:0 8px 24px #0003}.lg__tip.is-on{opacity:1}.tabs__list{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:.3rem;margin-bottom:1.2rem;display:flex}.tabs__tab{border:0;font:inherit;color:var(--muted);cursor:pointer;background:0 0;border-bottom:3px solid #0000;padding:.7rem 1rem;font-weight:700;transition:color .2s,border-color .2s}.tabs__tab:hover{color:var(--navy)}.tabs__tab[aria-selected=true]{color:var(--navy);border-bottom-color:var(--orange)}.tabs__panel{color:var(--ink)}.tabs__panel[hidden]{display:none}.callout{border-radius:var(--radius);border-inline-start:4px solid var(--navy);background:#1d627a0a;gap:.9rem;padding:1.1rem 1.3rem;display:flex}.callout__icon{width:1.4rem;height:1.4rem;color:var(--navy);flex:none}.callout__body{flex:1}.callout__body>:first-child{margin-top:0}.callout--tip{background:#16a34a12;border-inline-start-color:#16a34a}.callout--tip .callout__icon{color:#16a34a}.callout--warn{background:#f9731612;border-inline-start-color:#f97316}.callout--warn .callout__icon{color:#f97316}.callout--key{border-inline-start-color:var(--orange);background:#ff914c14}.callout--key .callout__icon{color:var(--orange)}.list{gap:.7rem;margin:0;padding:0;list-style:none;display:grid}.list__item{align-items:flex-start;gap:.9rem;display:flex}.list__marker{background:var(--navy);color:#fff;border-radius:50%;flex:none;justify-content:center;align-items:center;width:1.7rem;height:1.7rem;font-size:.85rem;font-weight:800;display:flex}.list--check .list__marker{background:var(--orange)}.list__text{flex:1;padding-top:.15rem}.list__text strong{color:var(--navy)}.qcm__q{color:var(--navy);margin:0 0 1rem;font-size:1.1rem;font-weight:800}.qcm__opts{gap:.6rem;display:grid}.qcm__opt{text-align:left;width:100%;font:inherit;cursor:pointer;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);align-items:center;gap:.8rem;padding:.9rem 1.1rem;transition:border-color .2s,background .2s;display:flex}.qcm__opt:hover:not(:disabled){border-color:var(--navy)}.qcm__opt:disabled{cursor:default}.qcm__opt:before{content:"";border:2px solid var(--muted);border-radius:50%;flex:none;width:1.2rem;height:1.2rem;transition:border-color .2s}.qcm__opt.is-correct{background:#16a34a12;border-color:#16a34a}.qcm__opt.is-correct:before{background:#16a34a;border-color:#16a34a;box-shadow:inset 0 0 0 3px #fff}.qcm__opt.is-wrong{background:#dc262610;border-color:#dc2626}.qcm__opt.is-wrong:before{border-color:#dc2626}.qcm__feedback{border-radius:var(--radius);margin:1rem 0 0;padding:.9rem 1.1rem;font-size:.92rem;display:none}.qcm__feedback.is-on{animation:dairia-fade .4s var(--ease);display:block}.qcm__feedback--ok{color:#14532d;background:#16a34a12}.qcm__feedback--ko{color:#7f1d1d;background:#dc262610}@media (prefers-reduced-motion:reduce){.lesson *{transition-duration:1ms!important;animation-duration:1ms!important}.reveal{opacity:1;transform:none}.lg__marker{transform:translate(-50%,-50%)scale(1)}}
.lesson-chapo{color:var(--navy);align-items:center;gap:.6rem;margin:.2rem 0 .4rem;font-size:1.35rem;display:flex}.lesson-chapo__n{background:var(--navy);color:#fff;border-radius:.55rem;flex:none;justify-content:center;align-items:center;width:2rem;height:2rem;font-size:.95rem;font-weight:800;display:inline-flex}.lesson-chapo__intro{color:var(--muted);margin-top:.3rem}.lesson-ss{color:var(--navy-d);margin:.2rem 0;font-size:1.05rem}.lesson-page{padding-bottom:3rem}