.lib{--ink:#142f48;--muted:#526777;--line:#dce5e7;--paper:#fff;--ground:#f8faf8;--yellow:#f8d450;--green:#146b4e;--mint:#e8f4ee;--sky:#eaf5f8;--rose:#fff0ed;--lavender:#f2eff9;--shadow:0 14px 40px #122d4214;background:var(--ground);min-width:320px;color:var(--ink);font-family:Avenir Next,Avenir,Segoe UI,Arial,sans-serif;line-height:1.45}.lib *{box-sizing:border-box}.lib button{font:inherit}.lib a{color:inherit}.lib img{max-width:100%;height:auto;display:block}.lib button,.lib a{-webkit-tap-highlight-color:transparent}.lib :focus-visible{outline-offset:3px;outline:3px solid #2f88b8}.lib h1,.lib h2,.lib h3,.lib p{margin-top:0}.wrap{width:min(1180px,100% - 48px);margin-inline:auto}.section{padding-block:30px 38px;scroll-margin-top:98px}.site-header{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff5;position:sticky;top:0}.header-inner{align-items:center;gap:32px;min-height:76px;display:flex}.brand{flex:none;align-items:center;gap:12px;text-decoration:none;display:inline-flex}.brand-mark{background:var(--yellow);border:2px solid var(--ink);border-radius:7px;place-items:center;width:42px;height:42px;font-size:15px;font-weight:900;display:grid}.brand-copy{flex-direction:column;line-height:1.08;display:flex}.brand-copy strong{font-size:15px}.brand-copy small{color:var(--muted);margin-top:4px;font-size:11px;font-weight:700}.desktop-nav{align-items:center;gap:4px;margin-left:auto;display:flex}.desktop-nav a{color:var(--muted);border-radius:6px;padding:10px 13px;font-size:14px;font-weight:700;text-decoration:none}.desktop-nav a:hover,.desktop-nav a.active{background:var(--sky);color:var(--ink)}.help-button{min-height:40px;color:var(--ink);cursor:pointer;white-space:nowrap;background:#fff;border:1px solid #b5c8d0;border-radius:6px;align-items:center;gap:8px;padding:8px 13px;font-weight:800;display:inline-flex}.help-button:hover{border-color:var(--ink);background:var(--sky)}.help-icon{border:2px solid;border-radius:50%;place-items:center;width:19px;height:19px;font-size:12px;font-weight:900;display:grid}.intro{padding-top:38px}.eyebrow{color:var(--green);text-transform:uppercase;margin:0 0 10px;font-size:12px;font-weight:900}.lib h1{max-width:700px;margin-bottom:12px;font-size:clamp(32px,4vw,52px);font-weight:900;line-height:1.08}.lib h2{margin-bottom:8px;font-size:27px;line-height:1.2}.lib h3{margin-bottom:6px;font-size:20px;line-height:1.25}.intro>p:last-of-type{max-width:620px;color:var(--muted);margin-bottom:26px;font-size:17px}.hero-image{object-fit:cover;object-position:center 52%;border:1px solid var(--line);border-radius:8px;width:100%;height:clamp(230px,31vw,370px)}.start-title{margin:24px 0 0;font-size:18px}.start-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:0;padding:24px 0 0;display:grid}.start-step{gap:13px;padding:0 23px 0 0;display:flex}.start-step+.start-step{border-left:1px solid var(--line);padding-left:23px}.step-number{background:var(--yellow);border-radius:50%;flex:none;place-items:center;width:31px;height:31px;font-weight:900;display:grid}.start-step strong{font-size:14px;display:block}.start-step span:last-child{color:var(--muted);margin-top:3px;font-size:13px;display:block}.section-head{justify-content:space-between;align-items:end;gap:16px;margin-bottom:22px;display:flex}.section-head p{color:var(--muted);margin-bottom:0;font-size:15px}.count{color:var(--muted);flex:none;font-size:13px;font-weight:800}.main-product{background:var(--paper);box-shadow:var(--shadow);border:1px solid #d7e4dd;border-radius:8px;grid-template-columns:minmax(0,45%) minmax(0,55%);display:grid;overflow:hidden}.main-cover-wrap{background:var(--mint);place-items:center;min-width:0;padding:28px;display:grid}.main-cover-wrap img{aspect-ratio:1.414;object-fit:contain;width:100%;max-width:460px;box-shadow:0 16px 30px #122d4224}.main-content{flex-direction:column;justify-content:center;align-items:flex-start;min-width:0;padding:42px 42px 36px;display:flex}.mini-label{background:var(--yellow);min-height:27px;color:var(--ink);text-transform:uppercase;border-radius:4px;align-items:center;padding:4px 9px;font-size:11px;font-weight:900;display:inline-flex}.main-content h3{margin-top:16px;margin-bottom:12px;font-size:31px}.main-content>p{max-width:480px;color:var(--muted);font-size:15px}.facts{flex-wrap:wrap;gap:10px;margin:14px 0 26px;padding:0;list-style:none;display:flex}.facts li{border:1px solid var(--line);min-height:30px;color:var(--ink);border-radius:4px;padding:5px 9px;font-size:12px;font-weight:800}.actions{flex-wrap:wrap;gap:10px;display:flex}.button{text-align:center;cursor:pointer;border:1px solid #0000;border-radius:7px;justify-content:center;align-items:center;gap:10px;min-height:48px;padding:11px 17px;font-size:14px;font-weight:850;text-decoration:none;transition:transform .18s,background .18s,border-color .18s,box-shadow .18s;display:inline-flex}.button:hover{transform:translateY(-2px)}.button:active{transform:translateY(1px)}.button-primary{border-color:var(--ink);background:var(--ink);color:#fff;box-shadow:0 4px #0b2031,0 10px 18px #142f4829}.button-primary:hover{background:#245574;box-shadow:0 5px #0b2031,0 13px 21px #142f4833}.button-primary:active{box-shadow:0 1px #0b2031}.button-secondary{color:var(--ink);background:#fff;border-color:#b5ccd0;box-shadow:0 3px #d5e2e3}.button-secondary:hover{color:#145b48;background:#ecf7f1;border-color:#39886e;box-shadow:0 4px #bedacf,0 9px 17px #146b4e1c}.button-secondary:active{box-shadow:0 1px #bedacf}.button-icon{flex:none;width:18px;height:18px}.level-heading{justify-content:space-between;align-items:baseline;gap:12px;margin:30px 0 13px;display:flex}.level-heading h3{margin:0;font-size:17px}.level-heading p{color:var(--muted);margin:0;font-size:13px}.levels{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.level{border:1px solid var(--line);border-left:4px solid var(--level);background:var(--paper);border-radius:7px;grid-template-columns:110px minmax(0,1fr);align-items:center;gap:14px;min-width:0;padding:10px;text-decoration:none;transition:transform .18s,border-color .18s,box-shadow .18s;display:grid;box-shadow:0 4px 14px #122d420a}.level:hover{border-color:var(--level);transform:translateY(-3px);box-shadow:0 14px 24px #122d421c}.level:active{transform:translateY(0)}.level-cover{aspect-ratio:4/5;object-fit:cover;border:1px solid #142f481f;border-radius:3px;width:110px;box-shadow:0 6px 12px #122d421f}.level-info{flex-direction:column;align-items:flex-start;min-width:0;min-height:137px;display:flex}.level-info strong{color:var(--ink);font-size:26px;line-height:1.08}.level-info>span:not(.level-page){color:var(--muted);margin-top:5px;font-size:13px;font-weight:750}.level-page{width:100%;color:var(--green);justify-content:space-between;align-items:center;gap:5px;margin-top:auto;font-size:11px;font-weight:850;display:flex}.level-page .button-icon{width:17px;height:17px}.collection-image{border:1px solid var(--line);object-fit:cover;object-position:center 52%;border-radius:8px;width:100%;height:clamp(190px,25vw,300px);margin-bottom:21px}.bonus-grid,.exercise-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.material-card{border:1px solid var(--line);background:var(--paper);border-radius:8px;grid-template-columns:155px minmax(0,1fr);min-width:0;display:grid;overflow:hidden}.material-cover{background:var(--tint);place-items:center;min-height:218px;padding:14px;display:grid}.material-cover img{object-fit:contain;width:100%;max-height:210px;box-shadow:0 10px 18px #122d4221}.material-info{flex-direction:column;align-items:flex-start;min-width:0;padding:20px 22px;display:flex}.material-info .tag{color:var(--green);text-transform:uppercase;margin:0 0 9px;font-size:11px;font-weight:900}.material-info h3{overflow-wrap:anywhere;font-size:18px}.material-info p{color:var(--muted);margin:3px 0 14px;font-size:13px}.material-info .button{min-height:42px;margin-top:auto;padding:8px 13px;font-size:12px}.exercise-card{grid-template-columns:42% minmax(0,1fr)}.exercise-card .material-cover{min-height:200px}.exercise-card .material-cover img{width:100%;max-height:none}.site-footer{border-top:1px solid var(--line);margin-top:24px;padding:27px 0 94px}.footer-inner{color:var(--muted);justify-content:space-between;align-items:center;gap:18px;font-size:13px;display:flex}.footer-inner strong{color:var(--ink)}.text-button{color:var(--green);cursor:pointer;background:0 0;border:0;padding:0;font-weight:900}.text-button:hover{text-decoration:underline}.mobile-nav{display:none}.lib dialog{border:1px solid var(--line);width:min(470px,100% - 32px);max-height:calc(100vh - 40px);color:var(--ink);background:#fff;border-radius:8px;margin:auto;padding:0;box-shadow:0 28px 80px #0a1e2b33}.lib dialog::backdrop{background:#1126338f}.dialog-body{padding:28px}.dialog-top{justify-content:space-between;align-items:flex-start;gap:18px;display:flex}.dialog-top h2{font-size:25px}.dialog-close{border:1px solid 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h3{font-size:25px}.level-heading{flex-direction:column;align-items:flex-start}.levels{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.level{border-left-width:1px;border-top:4px solid var(--level);flex-direction:column;align-items:stretch;gap:0;padding:8px;display:flex}.level-cover{aspect-ratio:4/5;width:100%}.level-info{min-height:96px;padding:10px 3px 3px}.level-info strong{font-size:22px}.level-info>span:not(.level-page){font-size:12px}.collection-image{object-position:center;height:190px}.bonus-grid,.exercise-grid{grid-template-columns:1fr;gap:11px}.material-card{grid-template-columns:118px minmax(0,1fr)}.material-cover{min-height:190px;padding:11px}.material-cover img{max-height:176px}.exercise-card{grid-template-columns:40% minmax(0,1fr)}.actions,.actions .button{width:100%}.exercise-card .material-cover{min-height:180px}.footer-inner{flex-direction:column;align-items:flex-start}.site-footer{padding-bottom:100px}.mobile-nav{z-index:19;padding:7px max(8px, env(safe-area-inset-right)) max(7px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));border-top:1px solid var(--line);background:#fffffffa;grid-template-columns:repeat(4,minmax(0,1fr));display:grid;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -8px 30px #122d420f}.mobile-nav a{min-width:0;min-height:46px;color:var(--muted);text-align:center;border-radius:5px;place-items:center;padding:6px 3px;font-size:11px;font-weight:900;text-decoration:none;display:grid}.mobile-nav a.active{background:var(--mint);color:var(--green)}}@media (width<=390px){.brand-copy strong{max-width:115px}.hero-image{height:190px}.material-card{grid-template-columns:102px minmax(0,1fr)}.material-info{padding:13px}.material-info h3{font-size:16px}.material-info p{font-size:12px}.exercise-card{grid-template-columns:40% minmax(0,1fr)}}@media (prefers-reduced-motion:reduce){.level,.button{transition:none}}.lib .button-primary,.lib .button-primary:hover,.lib a.button-primary,.lib a.button-primary:hover{color:#fff}