.fd-layout{display:grid;grid-template-columns:320px 1fr;gap:1.25rem;align-items:start}.fd-aside{border:1px solid rgb(31 35 40 / .10);border-radius:16px;background:#fff;padding:1rem;box-shadow:0 10px 24px rgb(0 0 0 / .06);position:sticky;top:92px}.fd-aside-title{margin:.1rem 0 .25rem;font-size:1.1rem}.fd-toc{position:relative;margin:0 0 1rem}.fd-toc-wrap{border:1px solid rgb(31 35 40 / .10);background:#fff;border-radius:16px;padding:.85rem .9rem;box-shadow:0 1px 2px rgb(0 0 0 / .05)}.fd-toc-title{font-weight:800;margin:0 0 .5rem}.fd-toc-list{list-style:none;margin:0;padding:0;display:grid;gap:.25rem;max-height:40vh;overflow:auto}.fd-toc-list a[aria-current="page"]{background:rgb(47 95 110 / .12)}.fd-toc-list a:hover{background:rgb(31 35 40 / .03)}.fd-mini ul{list-style:none;margin:.75rem 0 0;padding:0;display:flex;flex-direction:column;gap:.35rem}.fd-mini a{display:flex;justify-content:space-between;gap:.75rem;padding:.55rem .65rem;border-radius:14px;text-decoration:none;border:1px solid rgb(31 35 40 / .10);background:rgb(31 35 40 / .02);color:inherit;font:700 .95rem "Source Sans 3",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}.fd-mini a:hover{background:rgb(47 95 110 / .10);border-color:rgb(47 95 110 / .22)}.fd-mini a[aria-current="page"]{background:rgb(47 95 110 / .16);border-color:rgb(47 95 110 / .30)}.fd-main{min-width:0}.learn2-layout .fd-aside,.learn2-layout .fd-aside-inner{position:static!important;top:auto!important}.learn2-layout .fd-aside{position:sticky!important;top:24px!important}.learn2-layout .fd-aside-inner{position:static!important;top:auto!important}@media (max-width:980px){.learn2-layout .fd-aside{position:static!important;top:auto!important}}@media (max-width:980px){.fd-layout{grid-template-columns:1fr}.fd-aside{position:static;top:auto}}.fd-aside{max-height:calc(100vh - 110px);display:flex;flex-direction:column}.fd-aside-inner{min-height:0;display:flex;flex-direction:column}.fd-aside-inner{overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;-webkit-overflow-scrolling:touch}.fd-mini{overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;-webkit-overflow-scrolling:touch}.section-nav{margin:.85rem 0 1.1rem;border:1px solid rgb(31 35 40 / .12);border-radius:16px;background:rgb(47 95 110 / .06);box-shadow:0 10px 18px rgb(0 0 0 / .04)}.section-nav .wrap{max-width:1100px;margin:0 auto;padding:.85rem 1rem}.section-nav-title{font-weight:800;letter-spacing:.2px}.section-nav-list{list-style:none;padding:.65rem 0 0;margin:0;display:flex;gap:.5rem;flex-wrap:wrap}.section-nav-list a{display:inline-flex;align-items:center;padding:.42rem .62rem;border-radius:999px;text-decoration:none;border:1px solid rgb(47 95 110 / .22);background:rgb(47 95 110 / .12);color:inherit;font:700 .9rem "Source Sans 3",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}.section-nav-list a:hover{background:rgb(47 95 110 / .18);border-color:rgb(47 95 110 / .32)}.h2c-linkbacks{margin:1rem 0 0;padding:.85rem;border-radius:16px;border:1px solid rgb(31 35 40 / .12);background:rgb(31 35 40 / .015)}.h2c-badge-row{display:flex;gap:.45rem;flex-wrap:wrap;align-items:center;margin:0 0 .65rem}.h2c-badge{display:inline-flex;align-items:center;padding:.38rem .6rem;border-radius:999px;border:1px solid rgb(31 35 40 / .12);background:rgb(31 35 40 / .06);font:800 .82rem "Source Sans 3",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;letter-spacing:.2px}.h2c-badge.is-primary{border-color:rgb(47 95 110 / .28);background:rgb(47 95 110 / .16)}.h2c-badge.is-muted{border-color:rgb(31 35 40 / .14);background:rgb(31 35 40 / .06)}.h2c-linkbacks .ref-links-list{list-style:none;margin:0;padding:0;display:flex;gap:.5rem;flex-wrap:wrap}.h2c-linkbacks .ref-links-list a{display:inline-flex;align-items:center;padding:.45rem .65rem;border-radius:999px;text-decoration:none;border:1px solid rgb(47 95 110 / .22);background:rgb(47 95 110 / .12);color:inherit;font:700 .9rem "Source Sans 3",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}.h2c-linkbacks .ref-links-list a:hover{background:rgb(47 95 110 / .18);border-color:rgb(47 95 110 / .32)}#quiz .card{display:none}#quiz .card.active{display:block}#quiz .card h3{margin:0 0 .75rem}#quiz .card label{display:block;margin:.35rem 0}#quiz .card p{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:.9rem}.fd-nav{display:flex;flex-direction:column;gap:.6rem}.fd-nav-head{display:flex;align-items:flex-start;justify-content:space-between;gap:.75rem;padding:.35rem .05rem .1rem}.fd-nav-title{font:900 1.05rem "Source Sans 3",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;letter-spacing:.2px}.fd-nav-cta{display:inline-flex;align-items:center;justify-content:center;padding:.42rem .7rem;border-radius:999px;border:1px solid rgb(47 95 110 / .22);background:rgb(47 95 110 / .12);color:inherit;text-decoration:none;font:800 .88rem "Source Sans 3",system-ui,sans-serif;white-space:nowrap}.fd-nav-cta:hover{background:rgb(47 95 110 / .18);border-color:rgb(47 95 110 / .32)}.fd-nav-list,.fd-nav-sub{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.35rem}.fd-nav-list>li>a,.fd-nav-sub>li>a{display:flex;align-items:center;justify-content:space-between;gap:.75rem;padding:.55rem .65rem;border-radius:14px;text-decoration:none;border:1px solid rgb(31 35 40 / .10);background:rgb(31 35 40 / .02);color:inherit;font:700 .94rem "Source Sans 3",system-ui,sans-serif}.fd-nav-list>li>a:hover,.fd-nav-sub>li>a:hover{background:rgb(47 95 110 / .10);border-color:rgb(47 95 110 / .22)}.fd-nav-list a[aria-current="page"]{background:rgb(47 95 110 / .16);border-color:rgb(47 95 110 / .30)}.fd-nav-group{margin-top:.35rem;padding-top:.35rem;border-top:1px solid rgb(31 35 40 / .10)}.fd-nav-group-label{font:900 .74rem "Source Sans 3",system-ui,sans-serif;letter-spacing:.10em;text-transform:uppercase;opacity:.75;margin:0 0 .35rem .2rem}.fd-nav a{display:flex;align-items:flex-start;justify-content:space-between;gap:.75rem;padding:.55rem .65rem;border-radius:14px;text-decoration:none;border:1px solid rgb(31 35 40 / .10);background:rgb(31 35 40 / .02);color:inherit;font:800 .93rem "Source Sans 3",system-ui,sans-serif}.fd-nav a:hover{background:rgb(47 95 110 / .10);border-color:rgb(47 95 110 / .22)}.fd-nav a[aria-current="page"]{background:rgb(47 95 110 / .16);border-color:rgb(47 95 110 / .30)}.fd-nav-sub{list-style:none;margin:0;padding:0;display:grid;gap:.25rem}.fd-nav-link-text{min-width:0}fd-nav-link-text{min-width:0;flex:1 1 auto}.fd-nav-meta{flex:0 0 auto;font:900 .74rem "Source Sans 3",system-ui,sans-serif;opacity:.75;white-space:nowrap;margin-left:.5rem}.fd-nav-chip{flex:0 0 auto;margin-left:.5rem;display:inline-flex;align-items:center}.learn2-outline{border:1px solid rgb(31 35 40 / .10);border-radius:16px;background:rgb(47 95 110 / .06);padding:.75rem .75rem .65rem;margin:0 0 .85rem}.learn2-outline-title{font:900 .82rem "Source Sans 3",system-ui,sans-serif;letter-spacing:.06em;text-transform:uppercase;opacity:.78;margin:0 0 .5rem}.learn2-outline-list{list-style:none;margin:0;padding:0;display:grid;gap:.3rem}.learn2-outline-link{width:100%;text-align:left;border:1px solid rgb(31 35 40 / .10);background:rgb(255 255 255 / .70);border-radius:14px;padding:.5rem .6rem;font:800 .92rem "Source Sans 3",system-ui,sans-serif;cursor:pointer}.learn2-outline-link:hover{background:rgb(255 255 255 / .92);border-color:rgb(47 95 110 / .22)}.learn2-outline-link[aria-current="page"]{background:rgb(47 95 110 / .14);border-color:rgb(47 95 110 / .30)}.learn2-outline-quick{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.55rem}.learn2-outline-chip{display:inline-flex;align-items:center;padding:.35rem .55rem;border-radius:999px;border:1px solid rgb(47 95 110 / .26);background:rgb(47 95 110 / .12);text-decoration:none;font:800 .82rem "Source Sans 3",system-ui,sans-serif;color:inherit}.learn2-outline-chip:hover{background:rgb(47 95 110 / .18);border-color:rgb(47 95 110 / .34)}.learn2-class{border:1px solid rgb(31 35 40 / .12);border-radius:18px;background:#fff;box-shadow:0 10px 24px rgb(0 0 0 / .06);padding:1rem 1.05rem;margin:1rem 0}.learn2-class-head{display:flex;align-items:flex-start;justify-content:space-between;gap:.85rem;flex-wrap:wrap;margin-bottom:.75rem}.learn2-class-title{margin:0;font-size:1.15rem}.learn2-class-controls{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}.learn2-btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:.45rem .8rem;border-radius:999px;border:1px solid rgb(31 35 40 / .14);background:rgb(31 35 40 / .02);cursor:pointer;font:900 .92rem "Source Sans 3",system-ui,sans-serif}.learn2-btn:hover{background:rgb(47 95 110 / .10);border-color:rgb(47 95 110 / .22)}.learn2-btn.is-ghost{background:#fff0}.learn2-progress{font:900 .86rem "Source Sans 3",system-ui,sans-serif;opacity:.72}.learn2-class-sub{display:flex;justify-content:space-between;gap:.75rem;align-items:baseline;margin-top:.25rem}.learn2-slide-title{font:900 .96rem "Source Sans 3",system-ui,sans-serif;opacity:.9}.learn2-jump{font:800 .9rem "Source Sans 3",system-ui,sans-serif;text-decoration:none}.learn2-jump:hover{text-decoration:underline}.learn2-deck{margin-top:.65rem}.learn2-slide{display:none}.learn2-slide.is-active{display:block}.learn2-slide-h{margin:.1rem 0 .55rem;font-size:1.05rem}.learn2-slide-body p{margin:.35rem 0}.learn2-slide-body ul{margin:.35rem 0 .35rem 1.2rem}.learn2-slide.active{display:block;animation:learn2In .22s ease-out}.learn2-slide-h{margin:0 0 .55rem}.learn2-slide-body :where(p,ul,ol){max-width:72ch}.learn2-slide-body ul,.learn2-slide-body ol{padding-left:1.2rem}@keyframes learn2In{from{opacity:.2;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.learn2-btn:disabled{opacity:.45;cursor:not-allowed}.learn2-link{appearance:none;border:none;background:#fff0;padding:0;color:inherit;text-decoration:underline;font:800 .92rem "Source Sans 3",system-ui,sans-serif;cursor:pointer}.learn2-q-top{display:flex;justify-content:space-between;align-items:center;gap:.75rem}.learn2-q-count{font:900 .8rem "Source Sans 3",system-ui,sans-serif;opacity:.75;letter-spacing:.06em;text-transform:uppercase}.learn2-option{display:grid;grid-template-columns:22px 34px 1fr;gap:.55rem;align-items:flex-start;padding:.5rem .6rem;border-radius:14px;border:1px solid rgb(31 35 40 / .10);background:rgb(31 35 40 / .02);margin:.35rem 0}.learn2-option:hover{background:rgb(47 95 110 / .08);border-color:rgb(47 95 110 / .20)}.learn2-option input{margin-top:.15rem}.learn2-option-key{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:10px;border:1px solid rgb(31 35 40 / .14);background:rgb(255 255 255 / .85);font:900 .85rem "Source Sans 3",system-ui,sans-serif}.learn2-option-text{line-height:1.25}.learn2-q-actions{display:flex;gap:.45rem;flex-wrap:wrap;margin-top:.85rem}.learn2-quiz{margin-top:.9rem;padding-top:.9rem;border-top:1px dashed rgb(31 35 40 / .14)}.learn2-q{border:1px solid rgb(31 35 40 / .12);border-radius:16px;background:rgb(31 35 40 / .015);padding:.85rem .9rem;margin:.65rem 0}.learn2-q h3{margin:.05rem 0 .55rem;font-size:1rem}.learn2-option{display:flex;gap:.6rem;align-items:flex-start;padding:.6rem .7rem;border-radius:14px;border:1px solid rgb(31 35 40 / .12);background:#fff;cursor:pointer;margin:.35rem 0}.learn2-option:hover{background:rgb(47 95 110 / .06);border-color:rgb(47 95 110 / .18)}.learn2-option input{margin-top:.25rem}.learn2-option-key{width:1.9rem;height:1.9rem;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;border:1px solid rgb(31 35 40 / .14);background:rgb(31 35 40 / .02);font-weight:900;flex:0 0 auto}.learn2-feedback.is-good{border-color:rgb(34 197 94 / .28);background:rgb(34 197 94 / .06)}.learn2-fb-title{font:900 1rem "Source Sans 3",system-ui,sans-serif;margin-bottom:.2rem}.learn2-fb-line{margin-top:.35rem}.learn2-hint,.learn2-explain,.learn2-feedback{margin-top:.55rem;padding:.6rem .7rem;border-radius:14px;border:1px solid rgb(31 35 40 / .12);background:rgb(31 35 40 / .02);font-family:"Source Sans 3",system-ui,sans-serif}.learn2-feedback.is-ok{background:rgb(47 95 110 / .06);border-color:rgb(47 95 110 / .22)}.learn2-feedback.is-bad{background:rgb(180 35 24 / .06);border-color:rgb(180 35 24 / .26)}.learn2-q-actions{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.75rem}.learn2-toast-host{position:fixed;right:14px;bottom:14px;z-index:5000;display:flex;flex-direction:column;gap:.45rem;pointer-events:none}.learn2-toast{pointer-events:auto;opacity:0;transform:translateY(10px);transition:opacity .18s ease,transform .18s ease;border-radius:14px;border:1px solid rgb(31 35 40 / .16);background:#fff;padding:.6rem .7rem;font:900 .92rem "Source Sans 3",system-ui,sans-serif;box-shadow:0 18px 42px rgb(0 0 0 / .14)}.learn2-toast.is-on{opacity:1;transform:translateY(0)}.learn2-toast.is-good{border-color:rgb(34 197 94 / .28);background:rgb(34 197 94 / .10)}.learn2-toast.is-bad{border-color:rgb(239 68 68 / .25);background:rgb(239 68 68 / .08)}.learn2-toast-host{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:10000;pointer-events:none}.learn2-toast{pointer-events:none;background:#111;color:#fff;padding:.65rem .85rem;border-radius:14px;box-shadow:0 12px 30px rgb(0 0 0 / .25);font:900 .92rem "Source Sans 3",system-ui,sans-serif;opacity:0;transform:translateY(6px);transition:opacity .18s ease,transform .18s ease}.learn2-toast.is-show{opacity:1;transform:translateY(0)}.learn2-modal-backdrop{position:fixed;inset:0;background:rgb(0 0 0 / .42);z-index:12000;display:none}.learn2-modal-backdrop.is-open{display:block}.learn2-modal{position:absolute;left:50%;top:18vh;transform:translateX(-50%);width:min(520px,92vw);border-radius:18px;background:#fff;border:1px solid rgb(31 35 40 / .16);box-shadow:0 18px 42px rgb(0 0 0 / .18);padding:1rem 1.05rem}.learn2-modal h3{margin:.1rem 0 .4rem}.learn2-score-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem .6rem;border-radius:999px;border:1px solid rgb(47 95 110 / .24);background:rgb(47 95 110 / .12);font:900 .9rem "Source Sans 3",system-ui,sans-serif}.learn2-score-badge.is-good{background:rgb(31 35 40 / .06);border-color:rgb(31 35 40 / .16)}.learn2-score-badge.is-verygood{background:rgb(140 90 20 / .10);border-color:rgb(140 90 20 / .22)}.learn2-score-badge.is-perfect{background:rgb(47 95 110 / .14);border-color:rgb(47 95 110 / .30)}@media (max-width:980px){.learn2-modal{top:10vh}}.learn2-modal-head{padding:1rem 1.05rem .6rem;border-bottom:1px solid rgb(31 35 40 / .10)}.learn2-modal-title{font:900 1.2rem "Source Sans 3",system-ui,sans-serif}.learn2-modal-sub{opacity:.8;margin-top:.15rem}.learn2-modal-body{padding:.85rem 1.05rem 1rem}.learn2-modal-foot{padding:.75rem 1.05rem 1rem;border-top:1px solid rgb(31 35 40 / .10);display:flex;justify-content:flex-end}.learn2-score-row{display:flex;justify-content:space-between;gap:.75rem;flex-wrap:wrap;margin-bottom:.75rem}.learn2-score-chip{display:inline-flex;align-items:center;padding:.35rem .6rem;border-radius:999px;border:1px solid rgb(31 35 40 / .16);background:rgb(31 35 40 / .03);font:900 .9rem "Source Sans 3",system-ui,sans-serif}.learn2-score-stat{font:900 .92rem "Source Sans 3",system-ui,sans-serif;opacity:.82}.learn2-score-missed-title{font:900 .95rem "Source Sans 3",system-ui,sans-serif;margin:.25rem 0 .4rem}.learn2-score-missed ul{margin:.3rem 0 0;padding-left:1.1rem}.learn2-modal.is-a .learn2-modal-head{background:rgb(34 197 94 / .10)}.learn2-modal.is-vg .learn2-modal-head{background:rgb(59 130 246 / .10)}.learn2-modal.is-good .learn2-modal-head{background:rgb(47 95 110 / .10)}.learn2-modal.is-bad .learn2-modal-head{background:rgb(239 68 68 / .08)}#quiz-heat .card{display:none}#quiz-heat .card.active{display:block}.fd-main .h2c-callout{margin:.85rem 0}.fd-main .h2c-practice{margin-top:.75rem}.learn2-track .learn2-hero .overlay{align-items:flex-end}.learn2-track .learn2-hero .overlay .wrap{max-width:var(--maxw,1100px);width:100%}.learn2-track .learn2-hero-copy{display:inline-block;max-width:min(760px,100%);margin:clamp(18px,3vw,28px) 0 clamp(20px,4vw,34px);padding:clamp(16px,2.4vw,24px);border-radius:20px;background:rgb(17 20 24 / .88);border:1px solid rgb(255 255 255 / .14);box-shadow:0 18px 42px rgb(0 0 0 / .24);backdrop-filter:blur(2px)}.learn2-track .learn2-hero-copy h1,.learn2-track .learn2-hero-copy p{max-width:62ch}.learn2-track .learn2-hero-kicker{display:inline-flex;align-items:center;margin:0 0 .55rem;padding:.28rem .56rem;border-radius:999px;background:rgb(255 255 255 / .14);border:1px solid rgb(255 255 255 / .16);color:#fff;font:800 .82rem "Source Sans 3",system-ui,sans-serif;letter-spacing:.03em;text-transform:uppercase}.learn2-track .learn2-hero-actions{display:flex;flex-wrap:wrap;gap:.65rem;margin-top:1rem}.learn2-track .learn2-btn-primary,.learn2-track .learn2-btn-ghost{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:.62rem .95rem;border-radius:999px;text-decoration:none;font:900 .92rem "Source Sans 3",system-ui,sans-serif;transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease}.learn2-track .learn2-btn-primary{background:#fff;color:#1f2328;border:1px solid rgb(255 255 255 / .22)}.learn2-track .learn2-btn-primary:hover{background:rgb(255 255 255 / .94);transform:translateY(-1px)}.learn2-track .learn2-btn-ghost{background:rgb(255 255 255 / .10);color:#fff;border:1px solid rgb(255 255 255 / .22)}.learn2-track .learn2-btn-ghost:hover{background:rgb(255 255 255 / .16);border-color:rgb(255 255 255 / .30);transform:translateY(-1px)}.learn2-track .learn2-hero-chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}.learn2-track .learn2-chip{display:inline-flex;align-items:center;padding:.34rem .58rem;border-radius:999px;background:rgb(255 255 255 / .10);border:1px solid rgb(255 255 255 / .16);color:rgb(255 255 255 / .96);font:800 .82rem "Source Sans 3",system-ui,sans-serif;letter-spacing:.01em;text-decoration:none}.learn2-track .learn2-chip:hover{background:rgb(255 255 255 / .18);border-color:rgb(255 255 255 / .28)}.learn2-panel{scroll-margin-top:110px}.learn2-lab-preview-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.85rem}.learn2-lab-preview{display:grid;grid-template-columns:64px 1fr auto;gap:.85rem;align-items:center;text-decoration:none;color:inherit;border:1px solid rgb(31 35 40 / .10);border-radius:18px;background:#fff;padding:.85rem;box-shadow:0 10px 18px rgb(0 0 0 / .04)}.learn2-lab-preview:hover{border-color:rgb(47 95 110 / .24);background:rgb(47 95 110 / .04)}.learn2-lab-preview.is-live{border-color:rgb(47 95 110 / .26);background:rgb(47 95 110 / .05)}.learn2-lab-preview-body{display:flex;flex-direction:column;gap:.2rem}.learn2-lab-preview-body strong{font:900 1rem "Source Sans 3",system-ui,sans-serif}.learn2-lab-preview-body span:last-child{font:700 .92rem "Source Sans 3",system-ui,sans-serif;opacity:.85}.learn2-lab-preview-tag{display:inline-flex;align-items:center;padding:.28rem .55rem;border-radius:999px;background:rgb(31 35 40 / .06);border:1px solid rgb(31 35 40 / .12);font:800 .8rem "Source Sans 3",system-ui,sans-serif}.learn2-icon{position:relative;display:inline-flex;width:64px;height:64px;border-radius:18px;background:linear-gradient(180deg,rgb(31 35 40 / .08),rgb(31 35 40 / .02));border:1px solid rgb(31 35 40 / .12)}.learn2-icon.is-pan::before{content:"";position:absolute;left:10px;right:14px;bottom:18px;height:14px;border-radius:999px;background:#2c3138;box-shadow:0 10px 0 -5px rgb(0 0 0 / .12)}.learn2-icon.is-pan::after{content:"";position:absolute;right:6px;bottom:21px;width:18px;height:5px;border-radius:999px;background:#2c3138;transform:rotate(-18deg);transform-origin:right center}.learn2-icon-flame,.learn2-icon-flame::before,.learn2-icon-flame::after{position:absolute;bottom:8px;left:27px;content:"";width:10px;height:20px;border-radius:70% 70% 60% 60%/85% 85% 35% 35%;background:linear-gradient(180deg,#ffe08a 0%,#ff8a00 55%,#e44400 100%);box-shadow:0 0 16px rgb(255 136 0 / .34);animation:l2IconFlame 1.2s ease-in-out infinite}.learn2-icon-flame::before{left:-9px;bottom:2px;transform:scale(.78);animation-delay:.18s}.learn2-icon-flame::after{left:9px;bottom:1px;transform:scale(.7);animation-delay:.36s}.learn2-icon.is-board::before{content:"";position:absolute;inset:11px 14px 14px 14px;border-radius:14px;background:linear-gradient(180deg,#dfc399,#c79d67)}.learn2-icon.is-board::after{content:"";position:absolute;right:17px;top:16px;width:8px;height:8px;border-radius:50%;background:rgb(89 57 23 / .35)}.learn2-icon.is-scale::before{content:"";position:absolute;left:12px;right:12px;bottom:10px;height:16px;border-radius:0 0 14px 14px;background:#30363d}.learn2-icon.is-scale::after{content:"";position:absolute;left:17px;right:17px;top:12px;height:22px;border-radius:999px 999px 14px 14px;border:3px solid #30363d;background:radial-gradient(circle at 50% 70%,rgb(255 255 255 / .7),rgb(255 255 255 / .06))}.learn2-icon.is-oven::before{content:"";position:absolute;inset:10px;border-radius:14px;background:#3b434d}.learn2-icon.is-oven::after{content:"";position:absolute;left:17px;right:17px;bottom:17px;height:18px;border-radius:8px;background:linear-gradient(180deg,rgb(255 255 255 / .45),rgb(255 255 255 / .12));border:1px solid rgb(255 255 255 / .18);box-shadow:0 -18px 0 -12px rgb(255 255 255 / .75),-8px -18px 0 -13px rgb(255 255 255 / .7),8px -18px 0 -13px rgb(255 255 255 / .7)}.learn2-icon.is-leaf::before{content:"";position:absolute;left:17px;top:11px;width:30px;height:38px;border-radius:0 80% 0 80%;background:linear-gradient(180deg,#78b24b,#2f7a36);transform:rotate(-22deg)}.learn2-icon.is-leaf::after{content:"";position:absolute;left:30px;top:18px;width:3px;height:29px;background:rgb(255 255 255 / .55);transform:rotate(-22deg);transform-origin:top center}.learn2-icon.is-watercan::before{content:"";position:absolute;left:14px;bottom:15px;width:28px;height:22px;border-radius:10px 10px 12px 12px;background:#4e8ab8}.learn2-icon.is-watercan::after{content:"";position:absolute;right:12px;top:16px;width:20px;height:14px;border:4px solid #4e8ab8;border-left:none;border-bottom:none;border-radius:0 18px 0 0;transform:rotate(10deg)}@keyframes l2IconFlame{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-2px) scale(1.07)}}@media (max-width:760px){.learn2-track .learn2-hero-copy{max-width:100%;margin:14px 0 18px;padding:14px;border-radius:16px}.learn2-track .learn2-hero-actions{flex-direction:column;align-items:stretch}.learn2-track .learn2-btn-primary,.learn2-track .learn2-btn-ghost{width:100%}.learn2-lab-preview{grid-template-columns:56px 1fr}.learn2-lab-preview-tag{grid-column:2;justify-self:start}}.learn2-icon.is-knife::before{content:"";position:absolute;left:16px;top:30px;width:34px;height:6px;border-radius:999px;background:#2f343a;transform:rotate(-24deg);transform-origin:left center}.learn2-icon.is-knife::after{content:"";position:absolute;left:34px;top:18px;width:14px;height:18px;background:linear-gradient(180deg,#d8dde4,#9aa4af);clip-path:polygon(0 50%,100% 0,100% 100%);transform:rotate(-24deg);transform-origin:left center}.learn2-icon.is-gauge::before{content:"";position:absolute;inset:13px;border-radius:50%;border:4px solid #30363d;background:radial-gradient(circle at 50% 55%,rgb(255 255 255 / .72),rgb(255 255 255 / .08))}.learn2-icon.is-gauge::after{content:"";position:absolute;left:31px;top:19px;width:4px;height:18px;border-radius:999px;background:#c9602b;transform:rotate(38deg);transform-origin:bottom center}.learn2-icon.is-pot::before{content:"";position:absolute;left:12px;right:12px;bottom:14px;height:24px;border-radius:0 0 16px 16px;background:#343b43}.learn2-icon.is-pot::after{content:"";position:absolute;left:18px;right:18px;top:18px;height:10px;border-radius:999px;background:linear-gradient(180deg,#d59554,#9a5f2d);box-shadow:0 16px 0 0 #343b43}.learn2-icon.is-timer::before{content:"";position:absolute;inset:12px;border-radius:50%;border:4px solid #30363d;background:#fff}.learn2-icon.is-timer::after{content:"";position:absolute;left:31px;top:20px;width:4px;height:16px;border-radius:999px;background:#c9602b;box-shadow:8px 8px 0 -1px #30363d;transform-origin:bottom center}.learn2-icon.is-thermo::before{content:"";position:absolute;left:28px;top:12px;width:8px;height:28px;border-radius:999px;background:#d7dde5;border:2px solid #30363d}.learn2-icon.is-thermo::after{content:"";position:absolute;left:22px;bottom:12px;width:20px;height:20px;border-radius:50%;background:#c9602b;box-shadow:inset 0 0 0 3px #30363d}.learn2-icon.is-dough::before{content:"";position:absolute;left:12px;right:12px;bottom:16px;height:24px;border-radius:50% 50% 42% 42%;background:linear-gradient(180deg,#e9d0a4,#d8b27d)}.learn2-icon.is-dough::after{content:"";position:absolute;left:16px;right:16px;bottom:10px;height:6px;border-radius:999px;background:rgb(199 157 103 / .45)}.learn2-icon.is-proof::before{content:"";position:absolute;left:12px;right:12px;bottom:12px;height:18px;border-radius:999px;background:linear-gradient(180deg,#efd8b2,#d8b27d)}.learn2-icon.is-proof::after{content:"";position:absolute;left:18px;right:18px;top:12px;height:28px;border-radius:18px 18px 10px 10px;border:2px solid #30363d;background:rgb(255 255 255 / .22)}.learn2-icon.is-mixer::before{content:"";position:absolute;left:14px;right:14px;bottom:12px;height:18px;border-radius:0 0 18px 18px;background:#d8dde4;border:2px solid #30363d;border-top:none}.learn2-icon.is-mixer::after{content:"";position:absolute;left:24px;top:12px;width:16px;height:26px;border-left:3px solid #30363d;border-right:3px solid #30363d;border-bottom:3px solid #fff0;border-radius:0 0 12px 12px}.learn2-icon.is-crate::before{content:"";position:absolute;left:11px;right:11px;bottom:13px;height:22px;border-radius:6px;background:#9b6b3f;box-shadow:0 -8px 0 0 rgb(155 107 63 / .9)}.learn2-icon.is-crate::after{content:"";position:absolute;left:19px;top:16px;width:10px;height:10px;border-radius:50%;background:#d45236;box-shadow:13px 6px 0 #d45236,25px -1px 0 #efb248}.learn2-icon.is-fridge::before{content:"";position:absolute;inset:10px 18px;border-radius:10px;background:#d8dde4;border:2px solid #30363d}.learn2-icon.is-fridge::after{content:"";position:absolute;left:20px;right:20px;top:30px;height:2px;background:#30363d;box-shadow:18px -10px 0 -1px #30363d,18px 10px 0 -1px #30363d}.learn2-icon.is-soil::before{content:"";position:absolute;left:10px;right:10px;bottom:12px;height:18px;background:#6f5137;border-radius:10px;box-shadow:0 -10px 0 #9b7754,0 -18px 0 #7cb24c}.learn2-icon.is-soil::after{content:"";position:absolute;left:24px;top:16px;width:4px;height:30px;background:#f2f2f2;box-shadow:-8px 8px 0 -1px #f2f2f2,8px 12px 0 -1px #f2f2f2}.learn2-icon.is-pest::before{content:"";position:absolute;left:17px;top:11px;width:30px;height:38px;border-radius:0 80% 0 80%;background:linear-gradient(180deg,#78b24b,#2f7a36);transform:rotate(-22deg)}.learn2-icon.is-pest::after{content:"";position:absolute;left:22px;top:21px;width:6px;height:6px;border-radius:50%;background:#d45236;box-shadow:11px 8px 0 #d45236,15px -5px 0 #d45236}.learn2-icon.is-seed::before{content:"";position:absolute;left:11px;right:11px;bottom:12px;height:16px;border-radius:6px;background:#8f6d47;box-shadow:0 -10px 0 #b7936c}.learn2-icon.is-seed::after{content:"";position:absolute;left:24px;top:12px;width:4px;height:30px;background:#2f7a36;box-shadow:-8px 6px 0 -1px #78b24b,8px 10px 0 -1px #78b24b}.learn2-track .learn2-hero{position:relative;min-height:clamp(460px,64vw,720px)}.learn2-track .learn2-hero>img{width:100%;height:100%;min-height:clamp(460px,64vw,720px);object-fit:cover;object-position:center center;display:block}.learn2-track .learn2-hero .overlay{min-height:clamp(460px,64vw,720px);align-items:flex-end}.learn2-track .learn2-hero .overlay .wrap{padding-top:clamp(56px,8vw,96px);padding-bottom:clamp(22px,4vw,40px)}.learn2-track .learn2-hero-copy{margin-top:clamp(30px,7vw,72px)}.learn2-track .learn2-hero-copy h1{line-height:1.08;margin:0 0 .55rem;overflow:visible}.learn2-track .learn2-hero-copy h1 sup{line-height:0}@media (max-width:760px){.learn2-track .learn2-hero,.learn2-track .learn2-hero>img,.learn2-track .learn2-hero .overlay{min-height:520px}.learn2-track .learn2-hero .overlay .wrap{padding-top:74px;padding-bottom:18px}.learn2-track .learn2-hero-copy{margin-top:38px}}@media (min-width:981px){.fd-aside{max-height:none}.fd-aside-inner,.fd-mini,.fd-toc-list{max-height:none;overflow:visible;scrollbar-gutter:auto}}