/* BOORIKO 8.1 — one offer, three presentations; school materials, readable typography. */
.bk81-site{--b81-ink:#173c35;--b81-muted:#52685f;--b81-orange:#ff9c26;--b81-line:#dce4de;--b81-blue:#2459a6;--b81-paper:#fffefa;color:var(--b81-ink);background:#fffefa}.bk81-site *{box-sizing:border-box}.bk81-site [id]{scroll-margin-top:110px}.bk81-wrap{width:min(1240px,calc(100% - 80px));margin-inline:auto}.bk81-site .bk81-button,.bk81-header-cta{display:inline-flex;justify-content:center;align-items:center;gap:22px;min-height:54px;padding:16px 24px;border:1px solid #df8215;border-radius:10px;background:#ffa32f;color:#173c35!important;font:inherit;font-weight:850;text-decoration:none!important;line-height:1.35;cursor:pointer}.bk81-button:hover,.bk81-header-cta:hover{background:#ffb651;transform:translateY(-1px)}.bk81-site .bk81-text-link{display:inline-block;color:inherit;font-weight:800;text-decoration:underline;text-underline-offset:5px;line-height:1.6}.bk81-kicker{font-size:11px!important;letter-spacing:.15em;font-weight:850;text-transform:uppercase;color:inherit;margin:0 0 16px!important;line-height:1.55}.bk81-site :is(.bk81-home,.bk81-page,.bk81-common-offer,.bk81-header,.bk81-footer) :focus-visible{outline:3px solid #3b75dc;outline-offset:5px}.bk81-site :is(.bk81-home,.bk81-page,.bk81-common-offer) :is(h1,h2,h3){font-family:inherit;color:inherit;font-weight:850;letter-spacing:-.035em;line-height:1.1}.bk81-site :is(.bk81-home,.bk81-page,.bk81-common-offer) p{line-height:1.75}.bk81-site .bk81-muted{font-size:13px;color:var(--b81-muted)}
/* Header: accessible details dropdown; mobile navigation works without JavaScript. */
.bk81-header{position:sticky;top:0;background:#fffefbf7;backdrop-filter:blur(12px);border-bottom:1px solid #e6eae5;z-index:1000;color:#173c35}.admin-bar .bk81-header{top:32px}.bk81-header-inner{width:min(1400px,calc(100% - 56px));margin:auto;display:flex;align-items:center;gap:28px;min-height:90px}.bk81-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none!important;flex-shrink:0;color:#183450}.bk81-brand .bk78-mark{width:37px;height:37px}.bk81-brand .bk78-wordmark{font-size:23px;font-weight:900;letter-spacing:-1px;line-height:1;color:#183450}.bk81-brand .bk78-wordmark span{color:#e78a21}.bk81-menu{display:flex;align-items:center;gap:26px;margin-left:auto}.bk81-menu>a,.bk81-menu summary{color:#213f36;text-decoration:none;font-size:13px;font-weight:750;white-space:nowrap}.bk81-menu>a{padding:14px 0}.bk81-menu>a[aria-current]{color:#8c480e;text-decoration:underline;text-underline-offset:7px}.bk81-nav-dropdown{position:relative}.bk81-nav-dropdown summary{cursor:pointer;list-style:none;padding:14px 0}.bk81-nav-dropdown summary::-webkit-details-marker{display:none}.bk81-nav-dropdown summary span{margin-left:5px}.bk81-nav-dropdown>div{position:absolute;top:48px;left:-22px;width:290px;background:white;border:1px solid #d8e3dc;border-radius:14px;padding:22px;box-shadow:0 22px 50px #133a3224}.bk81-nav-dropdown>div>p{font-size:10px;font-weight:850;letter-spacing:.1em;margin:0 0 12px;color:#61786e}.bk81-nav-dropdown>div>a{display:flex;gap:18px;align-items:center;padding:12px 5px;text-decoration:none;color:#173c35;border-bottom:1px solid #edf1eb;font-size:13px}.bk81-nav-dropdown>div>a:hover{background:#f3f6ee}.bk81-nav-dropdown>div>a>b{min-width:38px;color:#2459a6}.bk81-nav-dropdown .bk81-nav-all{font-weight:800;border:0;padding-top:20px}.bk81-menu .bk81-login{border-left:1px solid #d8e1da;padding-left:22px}.bk81-header-cta{font-size:13px;padding:14px 18px;min-height:46px;gap:16px;white-space:nowrap}.bk81-menu-toggle{font:inherit;border:1px solid #d3ded6;border-radius:8px;background:white;padding:11px 13px;color:#173c35;font-size:13px;font-weight:750;display:none}.bk81-menu-toggle span{margin-right:5px}.bk81-menu-toggle[hidden]{display:none!important}
/* Hero: a single mascot scene, kept away from reading areas. */
.bk81-home-hero{background:#102f28;color:#fff;overflow:hidden}.bk81-home-hero-inner{display:grid;grid-template-columns:1fr 1fr;min-height:540px;position:relative}.bk81-home-copy{position:relative;z-index:2;padding:70px 0 60px;max-width:590px}.bk81-home-copy .bk81-kicker{color:#ffc278}.bk81-home-copy h1{font-size:clamp(42px,4.7vw,68px);margin:0 0 25px;letter-spacing:-.055em!important;line-height:1.05!important}.bk81-home-copy h1 em{font-style:normal;color:#ffa431}.bk81-home-copy>p:not(.bk81-kicker):not(.bk81-home-reassure){font-size:18px;max-width:455px;color:#e4eee8;margin:0 0 30px}.bk81-home-copy .bk81-button{font-size:16px;gap:24px}.bk81-home-copy .bk81-home-reassure{font-size:11px;letter-spacing:.01em;color:#d4e2d9;margin:13px 0 24px}.bk81-hero-tariffs{color:#f2f5ef;font-size:13px;font-weight:750;text-underline-offset:5px}.bk81-hero-tariffs span{margin-left:12px}.bk81-hero-scene{position:relative;min-width:0;margin-right:-70px}.bk81-hero-scene>img{position:absolute;width:100%;height:100%;inset:0;object-fit:cover;object-position:68% 50%;mask-image:linear-gradient(90deg,transparent 0,#000 20%);opacity:.98}.bk81-trial-sticker{position:absolute;bottom:40px;right:50px;padding:17px 23px;transform:rotate(2deg);background:#fff7dc;color:#173c35;border:1px solid #e2c78a;box-shadow:0 8px 35px #08241c40;border-radius:8px;display:grid;gap:3px;max-width:310px}.bk81-trial-sticker:before{content:'';width:65px;height:20px;background:#e6f0e6b8;position:absolute;top:-10px;left:38%;transform:rotate(-5deg)}.bk81-trial-sticker>span{font-size:12px;font-weight:750;text-transform:uppercase;letter-spacing:.09em}.bk81-trial-sticker strong{font-size:22px;letter-spacing:-.03em}.bk81-trial-sticker small{font-size:11px}.bk81-proof-strip{background:#eaf1e8;border-bottom:1px solid #dce7da}.bk81-proof-strip>.bk81-wrap{display:flex;justify-content:space-between;gap:24px;padding-block:19px;font-size:12px;font-weight:750}.bk81-proof-strip b{font-size:11px;color:#57744f;margin-right:12px;display:inline-grid;place-items:center;border:1px solid #b7cbb0;border-radius:50%;width:27px;height:27px}
/* Shared pricing has one data source and deliberately distinct, restrained frames. */
.bk81-home-section{padding-block:76px}.bk81-section-heading{display:flex;align-items:end;justify-content:space-between;gap:45px;margin-bottom:35px}.bk81-section-heading h2,.bk81-home h2{font-size:clamp(30px,3vw,44px);margin:0 0 12px}.bk81-section-heading>p{max-width:390px;margin:0 0 13px;font-size:14px;color:#52685f}.bk81-pricing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.bk81-plan{--plan:#2459a6;--plan-soft:#edf4ff;border:1px solid #d2dce4;border-top:5px solid var(--plan);border-radius:14px;background:linear-gradient(var(--plan-soft),#fff 70%);padding:30px 26px 24px;box-shadow:0 5px 18px #1d3c3005;min-width:0;display:flex;flex-direction:column;position:relative}.bk81-plan-2{--plan:#aa5913;--plan-soft:#fff2e3;border-color:#efd8bd;border-top-color:var(--plan)}.bk81-plan-3{--plan:#724599;--plan-soft:#f4edfb;border-color:#dfd3e9;border-top-color:var(--plan)}.bk81-plan-label{color:var(--plan);font-size:10px;letter-spacing:.12em;font-weight:850;margin:0 0 18px!important}.bk81-plan h3{font-size:27px!important;margin:0 0 7px!important;color:#193d35}.bk81-plan-grade{font-size:12px;margin:0 0 21px!important;color:#597067}.bk81-plan-price{font-size:46px;font-weight:850;letter-spacing:-.055em;line-height:1.1!important;margin:0 0 6px!important;color:#173b34}.bk81-plan-price>span{font-size:13px;letter-spacing:0;font-weight:600;margin-left:7px}.bk81-plan-total{font-size:11px;font-weight:750;margin:0 0 23px!important;color:#52665e}.bk81-plan ul{list-style:none;padding:22px 0 0;margin:0 0 26px;border-top:1px solid #bacbbe8a;display:grid;gap:11px;font-size:12px;color:#344f45;flex:1}.bk81-plan li{position:relative;padding-left:20px}.bk81-plan li:before{content:'✓';position:absolute;left:0;color:var(--plan);font-weight:900}.bk81-plan .bk81-button{font-size:12px;gap:10px;min-height:48px;padding:12px 9px;width:100%;background:#fffaf3;border-color:#b8c8bd}.bk81-plan-2 .bk81-button{background:#ffa32f;border-color:#d88721}.bk81-plan>small{font-size:9px;text-align:center;line-height:1.5;margin-top:12px;color:#5a6c62}.bk81-pricing-note{font-size:12px;color:#607167;margin:20px 0 0}.bk81-home-promotion{margin-top:28px}.bk81-common-offer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;padding:36px;background:#f5eddb;border:1px solid #e2d1ad;border-radius:14px;position:relative;color:#173c35}.bk81-common-offer h2{font-size:27px;margin:0 0 14px}.bk81-common-offer p{font-size:14px;margin:0 0 15px}.bk81-common-offer .bk81-kicker{color:#85501b}.bk81-common-actions{align-self:center;display:flex;flex-direction:column;align-items:flex-start;gap:14px;max-width:260px;font-size:13px}.bk81-common-actions .bk81-button{font-size:13px}.bk81-common-actions small{font-size:11px;color:#64736a}.bk81-family-prices{display:flex;flex-wrap:wrap;gap:12px 22px}.bk81-family-prices>span{white-space:nowrap;display:flex;gap:7px;align-items:baseline;font-size:13px}.bk81-family-prices small{font-size:10px}.bk81-common-offer .bk81-muted{font-size:11px;margin:0}.bk81-offer-compact{padding:24px;background:#f8f5eb}.bk81-offer-compact h2{font-size:23px}.bk81-offer-compact .bk81-kicker{font-size:9px!important;margin-bottom:8px!important}.bk81-offer-compact .bk81-family-prices{display:none}.bk81-offer-compact .bk81-common-actions{max-width:230px}.bk81-home-promotion .bk81-common-offer{border-left:5px solid #d99329}.bk81-footer-offer{margin-block:45px}.bk71-rail .bk81-common-offer{display:block;padding:20px}.bk71-rail .bk81-common-offer h2{font-size:22px}.bk71-rail .bk81-common-offer .bk81-common-actions{margin-top:20px}
/* School materials: decorative lines stay out of running text. */
.bk81-home-method{background:#f1f4ed;border-top:1px solid #e0e7db;border-bottom:1px solid #e0e7db;padding-block:74px}.bk81-method-cards,.bk81-subject-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:28px}.bk81-method-cards>article{padding:28px;min-width:0;border:1px solid #d6dcd2;border-radius:7px;background-color:#fffefa;box-shadow:3px 5px 0 #dbe3d580}.bk81-paper-french{background-color:#f9fcff;background-image:linear-gradient(90deg,transparent 23px,#e7a6a675 23px,#e7a6a675 24px,transparent 24px),repeating-linear-gradient(0deg,transparent 0,transparent 31px,#a2bfe42b 31px,#a2bfe42b 32px)}.bk81-paper-maths{background-color:#fffaf2;background-image:linear-gradient(#d8bd8e24 1px,transparent 1px),linear-gradient(90deg,#d8bd8e24 1px,transparent 1px);background-size:13px 13px}.bk81-paper-canson{background:#fffcf5;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 150 150' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23849a84' opacity='.05' filter='url(%23n)' d='M0 0h150v150H0z'/%3E%3C/svg%3E")}.bk81-card-number{display:inline-block;font-weight:850;font-size:12px;color:#365e49;background:#e9f0e1;border:1px solid #c9d6bf;border-radius:6px;padding:6px 10px;margin-bottom:22px}.bk81-method-cards h3{font-size:26px;margin:0 0 16px}.bk81-method-cards p{font-size:14px;margin:0 0 28px}.bk81-paper-example{font-size:15px;font-weight:700;color:#2459a6;padding:12px 0;border-top:1px dashed #acbbb4}.bk81-method-cards .bk81-paper-maths .bk81-paper-example{color:#8b4c14}.bk81-method-cards .bk81-paper-canson .bk81-paper-example{color:#466242}.bk81-subject-cards>a{padding:30px;border:1px solid #cedae4;border-radius:12px;position:relative;text-decoration:none;color:#193f58;min-width:0;display:flex;flex-direction:column}.bk81-subject-cards>a:hover{box-shadow:0 10px 25px #1e413213;transform:translateY(-3px)}.bk81-subject-cards .bk81-paper-maths{color:#704719;border-color:#e4d1b3}.bk81-subject-cards .bk81-subject-extra{color:#583778;border-color:#ded1ec;background:#f5f0fb}.bk81-subject-symbol{font-size:45px;font-weight:850;letter-spacing:-.05em;margin:0 0 22px}.bk81-subject-cards h3{font-size:26px;margin:0 0 17px}.bk81-subject-cards p:not(.bk81-kicker){font-size:14px;margin:0 0 26px;flex:1}.bk81-subject-cards strong{font-size:12px;text-decoration:underline;text-underline-offset:5px}.bk81-home-grades{padding-block:60px;background:#eaf1e8;border-block:1px solid #d4e0ce}.bk81-home-grades h2{margin:0 0 20px}.bk81-home-grades>div>p:not(.bk81-kicker){font-size:15px}.bk81-home-grades .bk81-section{padding:0;margin-top:28px;border:0}.bk81-home-grades .bk81-section>h2{font-size:14px;margin:0 0 18px}.bk81-grade-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.bk81-grade-grid>a{padding:24px 18px;border:1px solid #cbd8c6;background:#fffefa;border-radius:10px;text-decoration:none;color:#173c35;display:flex;flex-direction:column;min-width:0}.bk81-grade-grid>a>span{font-size:30px;letter-spacing:-.04em;font-weight:850;color:#2459a6}.bk81-grade-grid>a:nth-child(2)>span{color:#36744d}.bk81-grade-grid>a:nth-child(3)>span{color:#955522}.bk81-grade-grid>a:nth-child(4)>span{color:#795198}.bk81-grade-grid>a:nth-child(5)>span{color:#2d6c7e}.bk81-grade-grid p{font-size:12px;margin:14px 0 22px;flex:1}.bk81-grade-grid b{font-size:11px}.bk81-parent-preview{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center}.bk81-parent-preview>div>p:not(.bk81-kicker){font-size:15px;color:#52685f;max-width:485px}.bk81-parent-note{position:relative;background:#fbf3df;border:1px solid #dfcfaa;border-radius:5px;padding:42px;transform:rotate(1deg);box-shadow:7px 7px 0 #e9eee2}.bk81-parent-note h3{font-size:31px;margin:20px 0}.bk81-parent-note p{font-size:14px}.bk81-parent-note>strong{display:block;margin-top:24px;font-size:15px;color:#73541f}.bk81-tab{display:inline-block;padding:6px 12px;background:#fcdd9b;border:1px solid #e3c58a;font-size:10px;letter-spacing:.1em;font-weight:850;color:#735016}.bk81-home-signup{padding-block:62px;background:#173c35;color:#fff}.bk81-home-signup>.bk81-wrap{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center}.bk81-home-signup h2{margin:0 0 24px}.bk81-home-signup .bk81-kicker{color:#ffbf73}.bk81-home-signup>div>div>p:not(.bk81-kicker){font-size:15px;color:#e3ece4}.bk81-home-signup .bkwl{background:#fffdf7;color:#173c35;border-radius:16px;padding:28px}.bk81-home-signup .bkwl-email-label{font-size:14px}.bk81-home-signup .bkwl-check{font-size:12px}.bk81-home-signup .bkwl-privacy{font-size:10px}.bk81-home-faq{display:grid;grid-template-columns:1fr 1.25fr;gap:80px}.bk81-faq details{border-bottom:1px solid #d5e0d6;padding:20px 0}.bk81-faq summary{font-weight:750;font-size:15px;cursor:pointer;line-height:1.6}.bk81-faq details p{font-size:14px;color:#53695e;margin:15px 0 0}.bk81-convert{display:grid;grid-template-columns:1fr auto;gap:50px;align-items:center;border-radius:16px;padding:40px 44px;background:#eaf0e2;border:1px solid #cedcc5;margin-bottom:56px}.bk81-convert h2{font-size:31px;margin:0 0 18px}.bk81-convert p{font-size:14px;margin:0;max-width:600px}.bk81-convert>div:last-child{display:grid;gap:12px;justify-items:center;max-width:300px}.bk81-convert .bk81-button{font-size:13px}.bk81-convert small{font-size:11px;color:#536858}
/* Principal pages: distinct intro + slim table of contents + one reading column. */
.bk81-page{--page:#2459a6;--page-soft:#edf3fa}.bk81-tone-orange{--page:#94591e;--page-soft:#fbf1df}.bk81-tone-green{--page:#346547;--page-soft:#edf3e8}.bk81-tone-purple{--page:#73449b;--page-soft:#f2ecf8}.bk81-hero{background:var(--page-soft);border-bottom:1px solid #d8e2d6;padding:26px 0 60px}.bk81-breadcrumb{display:flex;flex-wrap:wrap;gap:12px;font-size:11px;color:#5f7264;margin-bottom:38px}.bk81-breadcrumb a{color:inherit}.bk81-hero-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:85px;align-items:center}.bk81-hero .bk81-kicker{color:var(--page)}.bk81-hero h1{font-size:clamp(36px,4vw,57px);max-width:760px;margin:0 0 25px}.bk81-lead{font-size:17px;color:#50695a;max-width:660px;margin:0 0 27px}.bk81-hero .bk81-button{font-size:14px}.bk81-hero-paper{padding:30px 34px;background:#fffefa;border:1px solid #d3ddcc;box-shadow:7px 8px 0 #dce4d585;border-radius:5px;transform:rotate(1deg)}.bk81-hero-paper>p{font-size:23px;font-weight:800;letter-spacing:-.025em;line-height:1.35!important;margin:22px 0}.bk81-hero-paper ul{padding-left:18px;margin:0;display:grid;gap:15px;font-size:13px}.bk81-reading-grid{display:grid;grid-template-columns:210px minmax(0,1fr);gap:65px;align-items:start;padding-top:60px}.bk81-toc{position:sticky;top:125px;font-size:12px}.bk81-toc>details{border-top:3px solid var(--page);padding-top:15px}.bk81-toc summary{list-style:none;font-weight:800;cursor:pointer;display:flex;justify-content:space-between;font-size:13px}.bk81-toc nav{display:grid;gap:0;margin-top:16px}.bk81-toc nav>a{display:block;text-decoration:none;padding:11px 0;color:#526b5b;border-bottom:1px solid #e2e8df;font-size:12px}.bk81-toc>p{font-size:11px;color:#69806d;margin-top:22px}.bk81-section{padding:0 0 42px;margin-bottom:42px;border-bottom:1px solid #e0e6db}.bk81-section>h2{font-size:32px;margin:0 0 25px}.bk81-section>p{font-size:15px;margin:0 0 21px;color:#4b6454}.bk81-section :is(h3){font-size:21px;margin:0 0 12px}.bk81-section .bk81-text-link{font-size:13px}.bk81-steps{display:grid;gap:16px}.bk81-steps>.bk81-item{display:grid;grid-template-columns:40px minmax(0,1fr);gap:18px;background:#f3f6ed;border:1px solid #dae4d2;border-radius:12px;padding:24px}.bk81-step-number{display:grid;place-items:center;width:36px;height:36px;background:#e1ead7;color:#3b643c;font-size:12px;font-weight:850;border-radius:8px}.bk81-item h3{font-size:20px}.bk81-item p{font-size:14px;margin:0;color:#536751}.bk81-cards,.bk81-situations,.bk81-checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.bk81-cards>.bk81-item,.bk81-situations>.bk81-item,.bk81-checklist>.bk81-item{padding:24px;border:1px solid #d6e0d1;background:#fafbf4;border-radius:12px}.bk81-cards>.bk81-item:last-child:nth-child(odd){grid-column:1/-1}.bk81-domain-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.bk81-domain-grid article{border:1px solid #dbe2d5;border-top:4px solid var(--domain);border-radius:10px;padding:24px;background:#fffefb}.bk81-domain-name{font-size:11px!important;font-weight:850;letter-spacing:.07em;color:var(--domain);margin:0 0 14px;text-transform:uppercase}.bk81-domain-grid h3{font-size:21px}.bk81-domain-grid p:not(.bk81-domain-name){font-size:13px;margin:0 0 22px;color:#50634d}.bk81-domain-grid .bk81-text-link{color:var(--domain)}.bk81-status{font-size:10px;letter-spacing:.03em;font-weight:800;color:#526e4e;background:#edf2e7;border:1px solid #d3dec9;padding:5px 8px;border-radius:5px;display:inline-block}.bk81-reading .bk81-grade-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.bk81-reading .bk81-pricing{gap:13px}.bk81-reading .bk81-plan{padding:23px 16px}.bk81-reading .bk81-plan-price{font-size:36px}.bk81-reading .bk81-plan h3{font-size:24px!important}.bk81-reading .bk81-plan-label{font-size:9px}.bk81-reading .bk81-plan .bk81-button{font-size:11px;gap:4px}.bk81-note,.bk81-notice{padding:24px;border:1px solid #ddcfaa;background:#fbf6e6;border-radius:10px;font-size:14px!important}.bk81-note p{font-size:14px}.bk81-table{overflow-x:auto;border:1px solid #d1ddca;border-radius:10px;margin:25px 0}.bk81-table table{width:100%;border-collapse:collapse;font-size:14px;text-align:center}.bk81-table th,.bk81-table td{padding:15px 10px;border-bottom:1px solid #dce6d5}.bk81-table th{background:#ecf2e7}.bk81-table caption{text-align:left;padding:15px;font-size:12px;color:#546650}.bk81-subject-list{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.bk81-subject-list>div{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:17px 0;border-bottom:1px solid #dce6d5;font-size:13px}.bk81-subject-list span{font-size:11px;color:#61715b}.bk81-details{padding:24px 0;font-size:14px}.bk81-details summary{cursor:pointer;font-weight:750}.bk81-details ul{padding-left:20px}.bk81-details li{margin-block:10px}.bk81-promotion{display:grid;grid-template-columns:auto 1fr;gap:35px;background:#fbf1da;border:1px solid #e3c994;border-radius:14px;padding:30px;align-items:start}.bk81-promotion h3{font-size:28px;margin:5px 0 20px}.bk81-promotion p{font-size:14px}.bk81-discount{font-size:66px;letter-spacing:-.07em;color:#82531e;white-space:nowrap}.bk81-discount span{font-size:30px;margin-left:6px}.bk81-launch-panel{padding:28px;border-radius:14px;background:#eef3e8;border:1px solid #d6e1ce}.bk81-launch-panel h3{font-size:27px}.bk81-launch-panel>.bkwl{margin-top:25px;padding:25px;border-radius:10px;background:white}.bk81-launch-panel p{font-size:14px}.bk81-roadmap details{border:1px solid #d8e2d1;border-radius:10px;background:#f8fbf3;margin-bottom:15px}.bk81-roadmap summary{padding:22px;display:grid;grid-template-columns:140px 1fr auto;gap:18px;align-items:center;cursor:pointer;font-weight:750;list-style:none;font-size:16px}.bk81-roadmap summary::-webkit-details-marker{display:none}.bk81-roadmap summary .bk81-status{justify-self:start}.bk81-roadmap details>div{padding:0 24px 24px;font-size:14px}.bk81-roadmap li{margin-bottom:12px}.bk81-demo{position:relative;background:#fbf5e5;border:1px solid #dfd0af;border-radius:12px;padding:30px}.bk81-demo h3{font-size:25px;margin:24px 0 15px}.bk81-demo p{font-size:14px}.bk81-demo details{background:#fffdf7;border:1px solid #e1d5bc;margin-top:12px;padding:15px;border-radius:8px}.bk81-demo summary{cursor:pointer;font-weight:700;font-size:13px}.bk81-crayons{display:flex;gap:16px;margin:25px 0;flex-wrap:wrap}.bk81-crayons>span{display:flex;gap:8px;padding:12px 16px;border:1px solid #b8cbdc;border-radius:8px;background:#e7f0f7}.bk81-crayons i{display:block;width:9px;height:66px;background:#ed9b31;border-radius:0 0 2px 2px;clip-path:polygon(50% 0,100% 12%,100% 100%,0 100%,0 12%)}.bk81-crayons i:nth-child(2){background:#4280b3}.bk81-crayons i:nth-child(3){background:#8baa68}.bk81-crayons i:nth-child(4){background:#b47f9c}.bk81-related{padding:0 0 38px}.bk81-related>div{display:flex;flex-wrap:wrap;gap:12px 30px}.bk81-related a{font-size:14px;font-weight:750;color:#346449;text-underline-offset:4px}.bk81-section.bk81-faq{border:0}.bk81-reading .bkl-discovery h3{font-size:25px}.bk81-reading .bkl-discovery>p{font-size:14px}.bk81-reading .bkl-series-grid .bkl-practice{background:#eff5fb;border:1px solid #cedce9;border-top:4px solid #2459a6}.bk81-reading .bkl-series-grid .bkl-practice:nth-child(2){background:#fff6e9;border-color:#e4cda8;border-top-color:#bc7c21}.bk81-reading .bkl-series-grid .bkl-practice:nth-child(3){background:#f4eff9;border-color:#dbcce7;border-top-color:#8353a6}
/* Footer */
.bk81-footer{background:#f1f4ec;border-top:1px solid #dbe4d4;padding-top:54px;color:#344d3d}.bk81-footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:55px;padding-bottom:45px}.bk81-footer-grid>div>p{font-size:17px;font-weight:700;line-height:1.6;margin:25px 0 14px}.bk81-footer-tag{font-size:11px;color:#6b7d67}.bk81-footer nav{display:flex;flex-direction:column;gap:13px}.bk81-footer h2{font-size:12px;font-weight:850;margin:7px 0 8px;letter-spacing:.02em}.bk81-footer nav a{font-size:11px;color:#5a6e56;text-decoration:none;line-height:1.6}.bk81-footer nav a:hover{text-decoration:underline}.bk81-footer-bottom{border-top:1px solid #d4dfcc;padding-block:22px;display:flex;justify-content:space-between;gap:20px;font-size:10px;color:#64755f}.bk81-footer-bottom nav{flex-direction:row;flex-wrap:wrap;gap:20px}.bk81-footer-bottom nav a{font-size:10px}
@media(min-width:1500px){.bk81-home-hero-inner{min-height:580px}.bk81-home-copy{padding-block:85px}}
@media(max-width:1150px){.bk81-header-inner{gap:18px;flex-wrap:wrap;padding-block:15px;min-height:80px}.bk81-menu-toggle{display:block;margin-left:auto}.bk81-menu{order:4;width:100%;margin:0;flex-wrap:wrap;padding:15px 0 5px;gap:14px 25px}.bk81-menu-ready:not(.bk81-menu-open) .bk81-menu{display:none}.bk81-nav-dropdown>div{left:0;z-index:2}.bk81-parent-preview,.bk81-home-signup>.bk81-wrap{gap:50px}.bk81-home-hero-inner{grid-template-columns:1.1fr 1fr}.bk81-home-copy h1{font-size:53px}.bk81-hero-scene{margin-right:-40px}.bk81-trial-sticker{right:20px;bottom:35px;padding:15px}.bk81-trial-sticker strong{font-size:19px}.bk81-reading-grid{grid-template-columns:170px minmax(0,1fr);gap:35px}.bk81-reading .bk81-pricing{grid-template-columns:1fr}.bk81-reading .bk81-plan{padding:25px}.bk81-reading .bk81-plan-price{font-size:43px}.bk81-reading .bk81-plan .bk81-button{font-size:14px}.bk81-reading .bk81-plan>small{font-size:11px}.bk81-hero-grid{gap:45px}.bk81-footer-grid{gap:30px}.bk81-common-offer{gap:25px}}
@media(max-width:800px){.bk81-wrap{width:calc(100% - 40px)}.bk81-header-inner{width:calc(100% - 32px);gap:12px}.bk81-brand .bk78-mark{width:31px;height:31px}.bk81-brand .bk78-wordmark{font-size:21px}.bk81-header-cta{font-size:12px;padding:12px;min-height:42px}.bk81-home-copy{padding-top:48px;padding-bottom:44px}.bk81-home-copy h1{font-size:43px}.bk81-home-copy>p:not(.bk81-kicker):not(.bk81-home-reassure){font-size:15px}.bk81-home-copy .bk81-button{font-size:13px;padding:15px;gap:12px}.bk81-home-copy .bk81-home-reassure{font-size:10px}.bk81-trial-sticker{bottom:32px;max-width:240px;right:10px}.bk81-trial-sticker strong{font-size:17px}.bk81-trial-sticker small{font-size:10px}.bk81-proof-strip>.bk81-wrap{font-size:10px;gap:10px}.bk81-proof-strip b{display:none}.bk81-home-section,.bk81-home-method{padding-block:50px}.bk81-section-heading{display:block}.bk81-section-heading>p{max-width:600px;margin-top:22px}.bk81-plan{padding:23px 16px}.bk81-plan-price{font-size:36px}.bk81-plan-label{font-size:9px}.bk81-plan .bk81-button{font-size:11px;gap:7px}.bk81-plan li{font-size:11px}.bk81-method-cards,.bk81-subject-cards{gap:15px}.bk81-method-cards>article,.bk81-subject-cards>a{padding:22px 18px}.bk81-method-cards h3,.bk81-subject-cards h3{font-size:22px}.bk81-method-cards p,.bk81-subject-cards p:not(.bk81-kicker){font-size:12px}.bk81-paper-example{font-size:13px}.bk81-grade-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.bk81-parent-preview,.bk81-home-signup>.bk81-wrap,.bk81-home-faq{grid-template-columns:1fr;gap:35px}.bk81-parent-note{max-width:600px}.bk81-convert{grid-template-columns:1fr;padding:28px;gap:25px}.bk81-convert>div:last-child{justify-items:start;max-width:none}.bk81-hero-grid{grid-template-columns:1fr;gap:35px}.bk81-hero-paper{max-width:650px;transform:none}.bk81-reading-grid{grid-template-columns:1fr;gap:35px;padding-top:35px}.bk81-toc{position:static}.bk81-toc nav{display:flex;flex-wrap:wrap;gap:8px 18px}.bk81-toc nav>a{padding:7px 0}.bk81-toc>p{display:none}.bk81-hero{padding-bottom:35px}.bk81-section>h2{font-size:29px}.bk81-common-offer{grid-template-columns:1fr;gap:20px}.bk81-common-actions{max-width:none;flex-direction:row;align-items:center;flex-wrap:wrap}.bk81-common-actions small{width:100%}.bk81-common-offer h2{font-size:25px}.bk81-common-offer .bk81-family-prices{flex-direction:column;gap:10px}.bk81-reading .bk81-pricing{grid-template-columns:repeat(3,minmax(0,1fr))}.bk81-reading .bk81-plan{padding:20px 14px}.bk81-reading .bk81-plan-price{font-size:32px}.bk81-reading .bk81-plan .bk81-button{font-size:11px}.bk81-footer-grid{grid-template-columns:1fr 1fr;gap:35px}.bk81-roadmap summary{grid-template-columns:1fr auto}.bk81-roadmap summary .bk81-status{grid-column:1/-1}}
@media(max-width:560px){.bk81-header-inner{min-height:73px;padding-block:12px;gap:8px}.bk81-brand{gap:6px}.bk81-brand .bk78-mark{width:29px;height:29px}.bk81-brand .bk78-wordmark{font-size:18px}.bk81-menu-toggle{padding:10px;font-size:11px;order:3;margin:0}.bk81-menu-toggle span{display:none}.bk81-header-cta{font-size:10px;margin-left:auto;padding:11px 10px;gap:7px;min-height:38px}.bk81-header-cta>span{display:none}.bk81-menu{display:flex;flex-direction:column;align-items:stretch;gap:0;padding:15px 4px 0}.bk81-menu>a,.bk81-nav-dropdown summary{padding:14px 0;font-size:14px;border-bottom:1px solid #e0e8dc}.bk81-menu .bk81-login{border-left:0;padding-left:0}.bk81-nav-dropdown>div{position:static;width:100%;box-shadow:none;padding:15px;margin:8px 0;border:0;background:#f1f5eb}.bk81-home-hero-inner{display:flex;flex-direction:column;width:100%}.bk81-home-copy{padding:36px 24px 22px;max-width:100%}.bk81-home-copy .bk81-kicker{font-size:9px!important;letter-spacing:.12em;margin-bottom:20px!important}.bk81-home-copy h1{font-size:46px}.bk81-home-copy>p:not(.bk81-kicker):not(.bk81-home-reassure){font-size:15px;max-width:380px;margin-bottom:25px}.bk81-home-copy .bk81-button{width:100%;font-size:14px;gap:15px;padding:15px 16px}.bk81-home-copy .bk81-home-reassure{font-size:10px;text-align:center;margin:12px 0 22px}.bk81-hero-tariffs{font-size:12px}.bk81-hero-scene{height:270px;margin:0;overflow:hidden}.bk81-hero-scene>img{object-position:65% 72%;mask-image:linear-gradient(180deg,transparent 0,#000 20%);width:100%;height:380px;top:-80px}.bk81-trial-sticker{bottom:22px;right:23px;padding:12px 15px;max-width:255px;transform:rotate(2deg)}.bk81-trial-sticker>span{font-size:9px}.bk81-trial-sticker strong{font-size:18px}.bk81-proof-strip>.bk81-wrap{padding-block:15px;display:grid;grid-template-columns:1fr;text-align:center;gap:6px;font-size:11px}.bk81-proof-strip b{display:inline;margin-right:10px;border:0}.bk81-home-section,.bk81-home-method{padding-block:42px}.bk81-home h2,.bk81-section-heading h2{font-size:31px;letter-spacing:-.035em}.bk81-section-heading{margin-bottom:25px}.bk81-section-heading>p{font-size:14px;line-height:1.7}.bk81-pricing,.bk81-reading .bk81-pricing{grid-template-columns:1fr;gap:20px}.bk81-plan,.bk81-reading .bk81-plan{padding:25px 26px}.bk81-plan h3,.bk81-reading .bk81-plan h3{font-size:28px!important}.bk81-plan-price,.bk81-reading .bk81-plan-price{font-size:48px}.bk81-plan-label,.bk81-reading .bk81-plan-label{font-size:10px}.bk81-plan-grade{font-size:12px}.bk81-plan li{font-size:13px}.bk81-plan .bk81-button,.bk81-reading .bk81-plan .bk81-button{font-size:14px}.bk81-plan>small{font-size:10px}.bk81-plan-total{font-size:12px}.bk81-pricing-note{font-size:11px}.bk81-common-offer{padding:24px}.bk81-common-offer h2{font-size:25px}.bk81-common-offer p{font-size:13px}.bk81-common-actions{display:grid;gap:12px}.bk81-common-actions .bk81-button{font-size:13px}.bk81-method-cards,.bk81-subject-cards{grid-template-columns:1fr;gap:18px}.bk81-method-cards>article,.bk81-subject-cards>a{padding:27px}.bk81-method-cards h3,.bk81-subject-cards h3{font-size:27px}.bk81-method-cards p,.bk81-subject-cards p:not(.bk81-kicker){font-size:14px}.bk81-paper-example{font-size:15px}.bk81-subject-symbol{font-size:42px}.bk81-grade-grid,.bk81-reading .bk81-grade-grid{grid-template-columns:1fr 1fr;gap:12px}.bk81-grade-grid>a{padding:22px 17px}.bk81-grade-grid>a:last-child{grid-column:1/-1}.bk81-grade-grid p{font-size:12px}.bk81-parent-preview{gap:30px}.bk81-parent-note{padding:27px;transform:none}.bk81-parent-note h3{font-size:28px}.bk81-home-signup{padding-block:40px}.bk81-home-signup .bkwl{padding:22px}.bk81-home-faq{gap:18px}.bk81-faq summary{font-size:14px}.bk81-faq details p{font-size:13px}.bk81-convert{padding:25px;margin-bottom:40px}.bk81-convert h2{font-size:27px}.bk81-convert .bk81-button{font-size:12px;gap:8px;padding:15px;width:100%}.bk81-convert small{font-size:10px}.bk81-breadcrumb{font-size:10px;margin-bottom:28px}.bk81-hero h1{font-size:37px}.bk81-lead{font-size:15px}.bk81-hero-paper{padding:25px}.bk81-hero-paper>p{font-size:23px}.bk81-hero-paper ul{font-size:12px}.bk81-reading-grid{padding-top:28px}.bk81-section{padding-bottom:30px;margin-bottom:30px}.bk81-section>h2{font-size:28px}.bk81-section>p{font-size:14px}.bk81-cards,.bk81-situations,.bk81-checklist,.bk81-domain-grid,.bk81-subject-list{grid-template-columns:1fr}.bk81-steps>.bk81-item{grid-template-columns:1fr;padding:22px;gap:15px}.bk81-item h3{font-size:20px}.bk81-item p{font-size:13px}.bk81-promotion{grid-template-columns:1fr;padding:24px;gap:15px}.bk81-promotion h3{font-size:26px}.bk81-promotion p{font-size:13px}.bk81-discount{font-size:62px}.bk81-launch-panel{padding:22px}.bk81-launch-panel>.bkwl{padding:17px}.bk81-demo{padding:22px}.bk81-demo h3{font-size:24px}.bk81-crayons{gap:10px}.bk81-crayons>span{padding:10px;gap:6px}.bk81-crayons i{width:7px;height:50px}.bk81-table th,.bk81-table td{padding:12px 6px;font-size:12px}.bk81-footer{padding-top:38px}.bk81-footer-grid{grid-template-columns:1fr 1fr;gap:30px 18px}.bk81-footer-grid>div{grid-column:1/-1}.bk81-footer-bottom{flex-direction:column;gap:13px}.bk81-footer nav a{font-size:11px}.bk81-footer nav{gap:12px}.bk81-footer-grid>div>p{font-size:18px;margin-top:20px}.bk81-footer-bottom nav{gap:12px}}
@media(max-width:359px){.bk81-header-inner{width:calc(100% - 24px)}.bk81-brand .bk78-mark{display:none}.bk81-brand .bk78-wordmark{font-size:17px}.bk81-header-cta{font-size:10px;padding:10px 8px}.bk81-menu-toggle{padding:9px 8px}.bk81-home-copy{padding-inline:20px}.bk81-home-copy h1{font-size:39px}.bk81-home-copy .bk81-button{font-size:12px}.bk81-home-copy .bk81-home-reassure{font-size:9px}.bk81-wrap{width:calc(100% - 32px)}.bk81-hero h1{font-size:33px}}
@media(prefers-reduced-motion:reduce){.bk81-site *{scroll-behavior:auto!important;transition:none!important;animation:none!important}.bk81-button:hover,.bk81-header-cta:hover,.bk81-subject-cards>a:hover{transform:none}}
@media print{.bk81-header,.bk81-footer,.bk81-toc,.bk81-footer-offer,.bk81-convert,.bk81-related,.bk81-common-offer{display:none}.bk81-wrap{width:100%}.bk81-reading-grid,.bk81-hero-grid{display:block}.bk81-hero-paper{display:none}.bk81-hero,.bk81-section{background:none;color:#000;padding:12px 0}.bk81-reading-grid{padding-top:15px}}

/* Price page gets directly to the family comparison. */
.bk81-page-offres .bk81-hero-paper{display:none}.bk81-page-offres .bk81-hero-grid{display:block}.bk81-page-offres .bk81-hero{padding-bottom:35px}.bk81-page-offres .bk81-hero h1{font-size:clamp(34px,3.3vw,48px);max-width:1000px}.bk81-page-offres .bk81-lead{max-width:880px;font-size:16px}.bk81-page-offres .bk81-breadcrumb{margin-bottom:22px}.bk81-page-offres .bk81-reading-grid{padding-top:38px}.bk81-home-promotion .bk81-family-prices{display:none}.bk81-home-promotion .bk81-common-offer{background:#f8edd6}.bk81-offer-compact{background:#fafbf6;border:1px solid #dce3d3;border-left:3px solid #a8bb8f}.bk81-offer-compact h2{font-size:21px}.bk81-offer-compact .bk81-button{background:white;border-color:#a6b99d}.bk81-offer-compact .bk81-common-actions .bk81-text-link,.bk81-offer-compact .bk81-muted{display:none}
@media(max-width:560px){.bk81-page-offres .bk81-hero h1{font-size:34px}.bk81-page-offres .bk81-hero .bk81-kicker{font-size:10px!important}.bk81-page-offres .bk81-lead{font-size:14px}.bk81-page-offres .bk81-hero .bk81-button{display:none}.bk81-page-offres .bk81-hero{padding-bottom:12px}.bk81-page-offres .bk81-reading-grid{padding-top:24px;gap:23px}.bk81-page-offres .bk81-section>h2{font-size:25px}}

/* Guides cadeaux : une mise en page éditoriale, des exemples utiles. */
.bk81-gift-example{border:1px solid #d4e0ec;border-left:4px solid #285f9f;background:repeating-linear-gradient(0deg,#fbfcff,#fbfcff 29px,#e7edf7 30px);padding:24px;border-radius:10px;margin:20px 0}.bk81-gift-question{font-size:21px!important;font-weight:650;color:#183752;line-height:1.6!important}.bk81-gift-example details{background:#fff;padding:15px 18px;border:1px solid #dbe4ed;border-radius:7px}.bk81-gift-example summary{cursor:pointer;font-weight:650;font-size:14px}.bk81-gift-example .bk81-tab{margin-bottom:12px;display:inline-block}.bk81-parent-preview .bk81-text-link{display:block;margin-top:15px}@media(max-width:600px){.bk81-gift-example{padding:18px}.bk81-gift-question{font-size:18px!important}}