.landing{background:var(--paper);color:var(--ink);overflow-x:clip}.landing .shell{max-width:var(--max);padding:0 var(--gutter);margin:0 auto}.landing p{margin:0 0 1em}.landing .display{font-family:var(--font-display);letter-spacing:-.018em;font-weight:400;line-height:.96}.landing h1,.landing h2,.landing h3,.landing h4,.landing p{margin:0}.landing :where(h1,h2,h3,h4){text-wrap:wrap}.landing ul{margin:0;padding:0;list-style:none}.landing a{color:inherit;text-decoration:none}.landing .hero{padding:64px 0 96px}.landing .hero-kicker{color:var(--rust-ink);margin-bottom:22px;font-size:16px;font-weight:500}.landing .hero h1{font-family:var(--font-display);letter-spacing:-.025em;max-width:20ch;margin:0 0 44px;font-size:clamp(50px,6.5vw,96px);font-weight:400;line-height:.94}.landing .hero h1 em{color:var(--rust-ink);font-style:italic}.landing .hero-lower{grid-template-columns:1fr .92fr;align-items:start;gap:80px;display:grid}.landing .hero-sub{color:var(--ink-2);max-width:46ch;margin-bottom:34px;font-size:21px;line-height:1.45}.landing .hero-actions{flex-wrap:wrap;align-items:center;gap:26px;margin-bottom:20px;display:flex}.landing .btn--rust,.landing .btn--rust:hover,.landing .btn--rust:active{color:#fff}.landing .hero-note{color:var(--muted);font-size:16px}.landing .hero-proof{color:var(--ink-2);flex-wrap:wrap;gap:26px;margin-top:44px;font-size:16px;display:flex}.landing .hero-proof span{align-items:center;gap:9px;display:flex}.landing .hero-proof span:before{content:"";background:var(--rust);border-radius:50%;flex:none;width:6px;height:6px}.landing .link-underline{border-bottom:1px solid var(--line-2);padding-bottom:3px;font-size:17px;font-weight:500}.landing .link-underline:hover{border-color:var(--ink)}.landing .task{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:30px 30px 26px}.landing .task-head{justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;display:flex}.landing .task-caption{color:var(--muted);margin:0;font-size:16px}.landing .task-nav{align-items:center;gap:8px;display:flex}.landing .task-count{color:var(--muted);text-align:right;font-variant-numeric:tabular-nums;min-width:44px;font-size:16px}.landing .arrow{border:1px solid var(--line-2);cursor:pointer;width:42px;height:42px;color:var(--ink);background:0 0;border-radius:50%;place-items:center;font-size:19px;line-height:1;transition:border-color .16s,background .16s,color .16s;display:grid}.landing .arrow:hover{border-color:var(--rust);color:var(--rust-ink);background:var(--rust-soft)}.landing .arrow:focus-visible{outline:2px solid var(--rust);outline-offset:2px}.landing .task-body{min-height:540px;transition:opacity .18s,transform .18s}.landing .task-body.is-switching{opacity:0;transform:translateY(6px)}.landing .task-topic{color:var(--rust-ink);margin-bottom:10px;font-size:16px}.landing .task-q{font-family:var(--font-display);letter-spacing:-.012em;margin-bottom:20px;font-size:31px;line-height:1.15}.landing .task-data{flex-wrap:wrap;gap:10px;margin-bottom:22px;display:flex}.landing .chip{border:1px solid var(--line);color:var(--ink-2);background:var(--paper);border-radius:999px;align-items:baseline;gap:6px;padding:8px 14px;font-size:15px;display:inline-flex}.landing .chip b{color:var(--ink);font-variant-numeric:tabular-nums;font-weight:600}.landing .opt{border:1px solid var(--line);background:var(--paper);border-radius:999px;align-items:center;gap:13px;margin-bottom:10px;padding:14px 20px;font-size:17px;transition:border-color .15s,background .15s;display:flex}.landing .opt .dot{border:1.5px solid var(--line-2);width:20px;height:20px;color:var(--paper);border-radius:50%;flex:none;place-items:center;font-size:15px;line-height:1;display:grid}.landing .opt.is-correct{border-color:var(--rust);background:var(--rust-soft);font-weight:600}.landing .opt.is-correct .dot{background:var(--rust);border-color:var(--rust)}.landing .feedback{background:var(--paper-2);border-left:3px solid var(--rust);color:var(--ink-2);border-radius:8px;margin-top:16px;padding:16px 18px;font-size:16px;line-height:1.5}.landing .feedback b{color:var(--ink)}.landing .sr-only{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.landing .section{padding:104px 0}.landing .section-head{grid-template-columns:1fr .75fr;align-items:end;gap:56px;margin-bottom:52px;display:grid}.landing h2.display{letter-spacing:-.018em;margin:0;font-size:clamp(38px,4.6vw,64px)}.landing .section-head p{color:var(--ink-2);max-width:44ch;margin:0;font-size:19px;line-height:1.5}.landing .steps{grid-template-columns:repeat(3,1fr);gap:44px;display:grid}.landing .step{border-top:1px solid var(--ink);padding-top:24px}.landing .step .n{font-family:var(--font-display);color:var(--rust);margin-bottom:24px;font-size:56px;line-height:.9;display:block}.landing .step h3{letter-spacing:-.01em;margin-bottom:10px;font-size:21px;font-weight:600}.landing .step p{color:var(--ink-2);max-width:32ch;margin:0;font-size:17px;line-height:1.5}.landing .topics-intro{max-width:52ch;color:var(--ink-2);margin-bottom:40px;font-size:19px;line-height:1.5}.landing .topic-cols{columns:3;column-gap:56px}.landing .topic-cols a{break-inside:avoid;border-bottom:1px solid var(--line);color:var(--ink);padding:9px 0;font-size:19px;line-height:1.35;display:block}.landing .topic-cols a:hover{color:var(--rust-ink);border-color:var(--rust)}.landing .topic-cols a span{transition:transform .16s;display:inline-block}.landing .topic-cols a:hover span{transform:translate(4px)}.landing .topics-more{margin-top:30px;font-size:17px}.landing .report-spread{grid-template-columns:1.5fr .9fr;align-items:stretch;gap:28px;display:grid}.landing .report-main{background:var(--card);border:1px solid var(--line);border-radius:var(--r);flex-direction:column;display:flex;overflow:hidden}.landing .report-main h3{font-family:var(--font-display);letter-spacing:-.01em;padding:24px 28px 6px;font-size:30px;font-weight:400}.landing .report-table{flex:1;padding:10px 28px 6px}.landing .rt-row{border-bottom:1px solid var(--line);grid-template-columns:1.5fr 1fr 120px;align-items:center;gap:18px;padding:13px 0;font-size:17px;display:grid}.landing .rt-row:last-child{border-bottom:0}.landing .rt-name{letter-spacing:-.005em;font-weight:550}.landing .dots{gap:6px;display:flex}.landing .dots i{border:1px solid var(--line-2);border-radius:50%;width:9px;height:9px;display:block}.landing .dots i.on{background:var(--rust);border-color:var(--rust)}.landing .rt-state{color:var(--muted);text-align:right;font-size:16px}.landing .rt-state.ok{color:var(--ink-2)}.landing .rt-state.gap{color:var(--rust-ink)}.landing .report-foot{border-top:1px solid var(--line);background:var(--paper);color:var(--muted);padding:16px 28px;font-size:16px}.landing .next-panel{background:var(--rust);color:var(--paper);border-radius:var(--r);flex-direction:column;padding:30px 28px 26px;display:flex}.landing .next-panel .k{color:#c7d0ff;margin-bottom:16px;font-size:15px}.landing .next-panel h3{font-family:var(--font-display);letter-spacing:-.015em;margin:0 0 14px;font-size:36px;font-weight:400;line-height:1.03}.landing .next-panel p{color:#dce2ff;margin:0 0 20px;font-size:16px;line-height:1.45}.landing .lesson-step{color:#f0f3ff;border-top:1px solid #f6f1e738;align-items:baseline;gap:12px;padding:11px 0;font-size:16px;display:flex}.landing .lesson-step span{font-family:var(--font-display);color:#c7d0ff;font-size:19px}.landing .next-panel .btn{background:var(--paper);width:100%;color:var(--ink);border-color:var(--paper);margin-top:auto}.landing .next-panel .note{color:#dce2ff;text-align:center;margin:12px 0 0;font-size:16px}.landing .price-grid{grid-template-columns:1fr 1fr;align-items:stretch;gap:26px;display:grid}.landing .price{border:1px solid var(--line);border-radius:var(--r);background:var(--card);flex-direction:column;padding:34px;display:flex}.landing .price .plan{color:var(--ink-2);margin-bottom:16px;font-size:17px;font-weight:600}.landing .price .amount{font-family:var(--font-display);letter-spacing:-.01em;font-variant-numeric:tabular-nums;margin:0 0 26px;font-size:58px;line-height:1}.landing .price .amount small{font-family:var(--font-ui);letter-spacing:0;color:var(--muted);font-size:16px}.landing .price ul{border-top:1px solid var(--line);margin:0 0 30px}.landing .price li{border-bottom:1px solid var(--line);color:var(--ink-2);gap:10px;padding:11px 0;font-size:17px;display:flex}.landing .price li:before{content:"—";color:var(--rust);font-weight:600}.landing .price .btn{width:100%;margin-top:auto}.landing .price--ink{background:var(--ink);color:var(--paper);border-color:var(--ink)}.landing .price--ink .amount small,.landing .price--ink li{color:#b7b2a8}.landing .price .note{color:var(--muted);margin:16px 0 0;font-size:16px}.landing .price--ink .note{color:#8f8a80}.landing .faq{grid-template-columns:.75fr 1.25fr;align-items:start;gap:64px;display:grid}.landing .faq-list{border-top:1px solid var(--ink)}.landing .faq details{border-bottom:1px solid var(--line);padding:22px 0}.landing .faq summary{cursor:pointer;letter-spacing:-.005em;justify-content:space-between;gap:28px;font-size:19px;font-weight:550;list-style:none;display:flex}.landing .faq summary::-webkit-details-marker{display:none}.landing .faq summary:after{content:"+";font-family:var(--font-display);color:var(--rust-ink);margin-top:-3px;font-size:24px;line-height:1}.landing .faq details[open] summary:after{content:"–"}.landing .faq summary:focus-visible{outline:2px solid var(--rust);outline-offset:3px;border-radius:3px}.landing .faq details p{color:var(--ink-2);max-width:58ch;margin:14px 0 0;font-size:17px}.landing .final{background:var(--ink);color:var(--paper);padding:110px 0;position:relative;overflow:hidden}.landing .final .shell{z-index:1;justify-content:space-between;align-items:end;gap:56px;display:flex;position:relative}.landing .final h2{font-family:var(--font-display);letter-spacing:-.02em;max-width:13ch;margin:0;font-size:clamp(48px,6.4vw,92px);font-weight:400;line-height:.93}.landing .final h2 em{color:#7c90ff;font-style:italic}.landing .final .right{max-width:330px}.landing .final p{color:#b7b2a8;margin:0 0 24px;font-size:17px}.landing .final .note{color:#8f8a80;margin-top:16px;font-size:16px}@media (width<=1080px){.landing .hero-lower,.landing .section-head,.landing .report-spread,.landing .faq{grid-template-columns:1fr;gap:44px}.landing .hero h1{max-width:20ch}.landing .task{max-width:600px}.landing .topic-cols{columns:2}.landing .price-grid{grid-template-columns:1fr}.landing .final .shell{flex-direction:column;align-items:flex-start}}@media (width<=760px){.landing .shell{padding:0 var(--gutter-mobile)}.landing .hero{padding:44px 0 56px}.landing .hero h1{font-size:clamp(46px,13vw,64px)}.landing .hero-sub{font-size:18px}.landing .hero-proof{gap:14px;margin-top:30px;font-size:15px}.landing .task{padding:22px 20px}.landing .task-q{font-size:26px}.landing .task-body{min-height:620px}.landing .section{padding:64px 0}.landing .steps{grid-template-columns:1fr;gap:28px}.landing .step .n{margin-bottom:16px;font-size:44px}.landing .topic-cols{columns:1}.landing .rt-row{grid-template-columns:1.3fr 1fr;gap:6px 14px;font-size:16px}.landing .rt-row .rt-state{text-align:right;grid-area:1/2}.landing .rt-row .dots{grid-area:2/1/auto/-1}.landing .report-main h3{padding:20px 20px 4px;font-size:26px}.landing .report-table{padding:8px 20px 4px}.landing .report-foot{padding:14px 20px}.landing .next-panel{padding:26px 22px}.landing .final{padding:70px 0}}.landing{background:radial-gradient(1100px 620px at 82% -8%, #2b46d638, transparent 62%), radial-gradient(900px 520px at 4% 62%, #2b46d61a, transparent 62%), var(--paper)}.landing .hero{padding-top:72px}.landing .hero-kicker,.landing .hero h1 em{color:var(--accent-ink)}.landing .hero-proof span:before{background:var(--accent)}.landing .task,.landing .report-main,.landing .price:not(.price--ink){--ink:#0b0b0d;--ink-2:#34312b;--ink-3:#5c584f;--muted:#6b675e;--line:#dcd7ca;--line-2:#c9c3b5;--paper:#f3f1eb;--paper-2:#eae6db;--card:#f7f5ef;--rust:#2b46d6;--rust-ink:#1e33a8;--rust-soft:#e5e9ff;--accent:#2b46d6;color:var(--ink);background:var(--card);border-color:var(--line-2)}.landing .task .feedback{background:var(--paper-2);border-left-color:var(--accent)}.landing .report-main .report-foot{background:var(--paper)}.landing .next-panel{color:#fff;background:linear-gradient(145deg,#2236b8 0%,#2b46d6 58%,#4160ff 100%)}.landing .next-panel .k{color:#c7d0ff}.landing .next-panel p,.landing .next-panel .note{color:#dce2ff}.landing .lesson-step{color:#f0f3ff;border-top-color:#ffffff38}.landing .lesson-step span{color:#c7d0ff}.landing .next-panel .btn{color:#0b0b0d;background:#f5f3ee;border-color:#f5f3ee}.landing .next-panel .btn:hover{background:#fff;border-color:#fff}.landing .price--ink{background:#050506;border-color:#242429}.landing .price--ink .plan{color:#b7b2a8}.landing .price--ink .amount{color:#f5f3ee}.landing .price--ink .amount small,.landing .price--ink li,.landing .price--ink .note{color:#b7b2a8}.landing .price--ink ul,.landing .price--ink li{border-color:#2a2a31}.landing .price--ink li:before{color:#7c90ff}.landing .final{color:#f5f3ee;background:linear-gradient(125deg,#050506 0%,#0b0b0d 55%,#101a4a 100%)}.landing .final h2 em{color:#7c90ff}.landing .final p{color:#c9c5bc}.landing .final .note{color:#8f8a80}.landing .btn--rust{box-shadow:0 18px 44px -18px #2b46d6d9}.landing .btn--rust:hover{box-shadow:0 22px 60px -18px #2b46d6}.landing .section--soft{background:var(--paper-2)}.landing .task-data-line{color:var(--ink-2);margin:0 0 14px;font-size:17px;line-height:1.5}.landing .task-data-line b{color:var(--ink);font-weight:600}.landing .task-context{color:var(--muted);border-left:2px solid var(--accent);margin:0 0 18px;padding-left:12px;font-size:16px;line-height:1.5}.landing .task-body{transform-origin:50% 60%;min-height:600px}.landing .task-body.is-out.dir-next{animation:.14s ease-in both task-out-next}.landing .task-body.is-out.dir-prev{animation:.14s ease-in both task-out-prev}.landing .task-body.is-in.dir-next{animation:.24s cubic-bezier(.2,.8,.2,1) both task-in-next}.landing .task-body.is-in.dir-prev{animation:.24s cubic-bezier(.2,.8,.2,1) both task-in-prev}@keyframes task-out-next{to{opacity:0;transform:translate(-26px)rotate(-1.4deg)}}@keyframes task-out-prev{to{opacity:0;transform:translate(26px)rotate(1.4deg)}}@keyframes task-in-next{0%{opacity:0;transform:translate(34px)rotate(1.6deg)}to{opacity:1;transform:none}}@keyframes task-in-prev{0%{opacity:0;transform:translate(-34px)rotate(-1.6deg)}to{opacity:1;transform:none}}@media (width<=760px){.landing .task-body{min-height:0}}.landing .hero h1{letter-spacing:-.035em;max-width:none;margin-bottom:40px;font-size:clamp(42px,5.4vw,80px);font-weight:600;line-height:1.02}.landing .hero h1 em,.landing .final h2 em{font-style:normal}.landing .hero h1 em{white-space:nowrap}.landing .display,.landing h2.display{letter-spacing:-.03em;font-weight:600;line-height:1.04}.landing h2.display{font-size:clamp(34px,4vw,54px)}.landing .final h2{letter-spacing:-.035em;font-size:clamp(44px,5.6vw,80px);font-weight:600;line-height:1}.landing .step .n{letter-spacing:-.03em;font-size:44px;font-weight:600}.landing .task-q{letter-spacing:-.015em;font-size:25px;font-weight:600;line-height:1.25}.landing .report-main h3{letter-spacing:-.02em;font-size:24px;font-weight:600}.landing .next-panel h3{letter-spacing:-.025em;font-size:30px;font-weight:600;line-height:1.1}.landing .lesson-step span{font-size:16px;font-weight:600}.landing .price .amount{letter-spacing:-.03em;font-variant-numeric:normal;font-size:50px;font-weight:600}.landing h2.display{text-wrap:balance}.landing .faq summary:after{font-family:var(--font-ui);font-weight:400}.landing .task-body{min-height:500px}.landing button.opt{width:100%;font:inherit;color:var(--ink);text-align:left;cursor:pointer;font-size:17px}.landing button.opt:hover:not(:disabled){border-color:var(--rust)}.landing button.opt:focus-visible{outline:2px solid var(--rust);outline-offset:2px}.landing button.opt:disabled{cursor:default}.landing .opt.is-wrong{border-color:var(--error);background:var(--error-soft)}.landing .opt.is-wrong .dot{background:var(--error);border-color:var(--error)}.landing .opt.is-dim{opacity:.6}.landing .task-hint{font:inherit;color:var(--rust-ink);cursor:pointer;background:0 0;border:0;border-bottom:1px solid;margin:0 0 18px;padding:0;font-size:16px}.landing .task-hint:focus-visible{outline:2px solid var(--rust);outline-offset:3px}.landing .feedback.is-wrong{border-left-color:var(--error)}.landing .task-tip{color:var(--muted);margin:14px 0 0;font-size:15px}.landing .topic-groups{columns:3;column-gap:56px}.landing .topic-group{break-inside:avoid;margin:0 0 30px}.landing .topic-group h3{color:var(--muted);letter-spacing:.04em;text-transform:uppercase;margin:0 0 4px;font-size:15px;font-weight:800}.landing .topic-group a{border-bottom:1px solid var(--line);color:var(--ink);padding:8px 0;font-size:18px;line-height:1.35;display:block}.landing .topic-group a:hover{color:var(--rust-ink);border-color:var(--rust)}.landing .topic-group a span{transition:transform .16s;display:inline-block}.landing .topic-group a:hover span{transform:translate(4px)}.landing .topic-tools{max-width:46ch;margin:0 0 30px}.landing .topic-tools .field__hint{margin:0}.landing .topic-group[hidden],.landing .topic-group a[hidden]{display:none}.landing .task-topic a{color:inherit;text-underline-offset:.22em;text-decoration:underline 1.5px dotted;text-decoration-color:color-mix(in oklab,currentColor 40%,transparent);transition:text-decoration-color .16s}.landing .task-topic a:hover{text-decoration-style:solid;text-decoration-color:currentColor}@media (width<=1080px){.landing .topic-groups{columns:2}}@media (width<=760px){.landing .topic-groups{columns:1}.landing .hero h1{font-size:clamp(38px,10.5vw,54px)}.landing .task-body{min-height:0}}