:root{--ink:#202945;--paper:#faf9f5;--blue:#3855db;--muted:#707581;--line:#e4e5e6}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.wrap{width:min(1160px,calc(100% - 64px));margin-inline:auto}header{height:104px;display:flex;align-items:center;justify-content:space-between;gap:20px}.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:28px;letter-spacing:-1.2px}.logo-icon{display:grid;place-items:center;width:40px;height:40px;background:var(--blue);border-radius:12px;color:#fff;font-size:28px;line-height:1}.tag{font-size:9px;letter-spacing:1.4px;font-weight:500;margin-left:10px;color:var(--muted)}nav{display:flex;gap:27px;align-items:center;font-size:13px}.small-cta{border:1px solid #d9dce6;border-radius:8px;padding:10px 17px;font-weight:600}.hero{display:grid;grid-template-columns:1fr 1fr;gap:56px;padding-top:59px;padding-bottom:78px;align-items:center}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:700;display:flex;gap:8px;align-items:center}.eyebrow>span{width:6px;height:6px;background:var(--blue);border-radius:50%}h1{font-size:76px;line-height:1.06;letter-spacing:-4px;margin:23px 0}h1>span{color:var(--blue);display:inline-block;position:relative}h1>span:after{content:'';position:absolute;bottom:-6px;left:0;width:100%;height:9px;background:#c7d13b;clip-path:polygon(0 25%,100% 0,99% 50%,1% 100%)}.lead{font-size:18px;color:#676e7b;max-width:415px;margin:30px 0}.cta{display:inline-flex;gap:39px;align-items:center;background:var(--blue);color:white;border-radius:9px;padding:17px 24px;font-size:15px;font-weight:600;box-shadow:0 6px 12px #3855db15;transition:transform .15s}.cta:hover{transform:translateY(-2px)}.hero-meta{font-size:10px;display:flex;gap:20px;margin-top:20px;color:var(--muted)}.status{display:flex;align-items:center;gap:6px}.status i{width:6px;height:6px;border-radius:50%;background:#b8bdc9}.status.online i{background:#4a9b65}.illustration{padding:27px 33px;background:#eeefe8;border:1px solid #e0e3d7;border-radius:20px;position:relative;min-height:421px;transform:rotate(1.5deg)}.paper-label{font-size:9px;letter-spacing:1.8px;color:#8b927d}.chat-user{background:var(--blue);color:white;border-radius:14px 14px 4px 14px;padding:13px 18px;font-size:15px;max-width:265px;margin:28px 0 17px auto;box-shadow:0 6px 20px #3855db16}.chat-user>span{display:block;font-size:9px;opacity:.65;text-align:right;margin-top:5px}.chat-bot{background:white;border:1px solid #e5e6e0;border-radius:14px 14px 14px 4px;box-shadow:0 12px 30px #20294505;padding:20px 23px;margin-right:30px}.bot-label{display:flex;gap:9px;align-items:center;font-size:11px;font-weight:700}.bot-label b{background:var(--blue);color:white;border-radius:7px;width:25px;height:25px;text-align:center;font-size:20px;line-height:25px}.bot-label>span{font-size:8px;letter-spacing:.7px;color:#8c93a3;font-weight:500;margin-left:auto}.chat-bot p{font-size:12px;color:#6c7280;margin-bottom:12px}.formula{font-size:34px;font-family:Georgia,serif;font-style:italic;color:var(--blue);text-align:center;background:#f6f7fc;border-radius:8px;padding:8px}.calculation{text-align:center}.calculation strong{font-size:19px;color:var(--ink)}.answer-line{font-size:10px;color:#6f7d48;border-top:1px solid #eceee5;padding-top:11px}.mock-buttons{display:flex;gap:7px;margin-top:13px;font-size:9px}.mock-buttons span{padding:6px 10px;border-radius:5px;background:#eef1fe;color:var(--blue)}.mock-buttons span+span{background:#f5f6f7;color:#7b8190}.sticker{position:absolute;right:-18px;bottom:66px;background:#dce88a;border:3px solid var(--paper);border-radius:50%;width:102px;height:102px;display:flex;flex-direction:column;justify-content:center;align-items:center;font-size:27px;font-weight:700;transform:rotate(-14deg);box-shadow:0 4px 8px #0001}.sticker span{font-size:8px;font-weight:400}.example-caption{text-align:center;font-size:9px;color:#8a9080;margin-top:15px}.strip{border-block:1px solid var(--line);background:#f3f3ec}.strip-inner{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-block:22px;font-size:12px;color:#687060}.strip-inner i{font-style:normal;color:#aab77c;font-size:20px}.subjects{padding-block:68px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:25px}h2{font-size:38px;letter-spacing:-1.5px;line-height:1.16;margin:15px 0 0}.search{border:1px solid var(--line);background:white;border-radius:8px;display:flex;gap:8px;align-items:center;padding:10px 12px;width:270px;color:#8b91a1}.search span{font-size:23px;line-height:1}.search input{border:0;outline:0;min-width:0;width:100%;font-size:11px;background:transparent;color:var(--ink)}.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:31px}.subject{font:inherit;text-align:left;background:white;border:1px solid var(--line);border-radius:12px;padding:21px;cursor:pointer;transition:border-color .15s,transform .15s;color:inherit;min-height:145px;position:relative}.subject:hover{border-color:#a9b4ec;transform:translateY(-2px)}.subject-icon{width:34px;height:34px;display:flex;align-items:center;justify-content:center;background:var(--tint,#eef1fe);border-radius:9px;font-family:Georgia,serif;font-size:21px;margin-bottom:14px}.subject-title{font-size:13px;font-weight:700}.subject-count{font-size:10px;color:#9297a2;margin-top:6px}.subject-arrow{position:absolute;bottom:22px;right:20px;color:#9b9fac;font-size:18px}.catalog-note{color:#8a8f9b;font-size:11px;max-width:840px;margin-top:22px}.how{border-top:1px solid var(--line);padding-block:60px 72px;display:grid;grid-template-columns:1fr 1.2fr;gap:85px}.how-title p{font-size:13px;color:var(--muted);max-width:250px;margin-top:21px}.steps article{display:flex;gap:20px;padding-block:20px;border-bottom:1px solid var(--line)}.steps article:first-child{padding-top:0}.steps article:last-child{border:0}.steps article>span{font-family:Georgia,serif;font-size:25px;color:#c4c8d1;line-height:1.2}.steps h3{font-size:15px;margin:0}.steps p{font-size:12px;color:var(--muted);margin:7px 0 0}.end-card{background:#edf0fc;padding:42px 46px;border:1px solid #dfe4fb;border-radius:17px;display:flex;align-items:center;justify-content:space-between;gap:25px}.end-card h2{font-size:36px}.end-card p{font-size:13px;color:var(--muted);margin-top:19px}.end-card .eyebrow{color:var(--blue)}.details{padding-block:42px 65px;max-width:850px}.details details{border-bottom:1px solid var(--line);padding:15px 0}.details summary{cursor:pointer;font-size:13px;font-weight:600}.details p{font-size:12px;color:var(--muted);line-height:1.8}.details a{text-decoration:underline}footer{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-block:27px;color:#8c919e;font-size:10px}footer .logo{color:var(--ink);font-size:24px}dialog{max-width:680px;width:calc(100% - 32px);border:1px solid var(--line);border-radius:16px;padding:30px;color:var(--ink);background:var(--paper);max-height:85vh}dialog::backdrop{background:#1c264e88}.dialog-heading{display:flex;justify-content:space-between;align-items:start;gap:16px}.dialog-heading h2{font-size:28px}.dialog-heading button{font-size:28px;background:none;border:0;cursor:pointer;color:var(--muted)}dialog>p{font-size:12px;color:var(--muted)}#topics-list{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin:22px 0}#topics-list button{font:inherit;font-size:12px;text-align:left;padding:9px 12px;background:white;border:1px solid var(--line);border-radius:5px;color:var(--ink);cursor:pointer}#topics-list button:hover{border-color:var(--blue)}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #a0afea;outline-offset:3px}.no-results{font-size:13px;color:var(--muted);grid-column:1/-1}@media(max-width:950px){h1{font-size:60px}.hero{gap:28px}.illustration{padding:23px}.tag{display:none}.subject-grid{grid-template-columns:repeat(3,1fr)}.how{gap:40px}}@media(max-width:650px){.wrap{width:calc(100% - 36px)}header{height:76px}.logo{font-size:24px;gap:8px}.logo-icon{width:33px;height:33px;font-size:23px}nav>a:not(.small-cta){display:none}.small-cta{font-size:10px;padding:8px 11px}.hero{grid-template-columns:1fr;padding-top:30px;padding-bottom:35px;gap:35px}h1{font-size:59px;letter-spacing:-3px;margin-top:19px}.lead{font-size:16px;margin:26px 0;max-width:350px}.hero-meta{font-size:9px;gap:12px}.illustration{min-height:0;padding:23px 22px;margin:0 5px}.chat-user{margin-top:20px}.chat-bot{margin-right:8px;padding:17px}.sticker{width:82px;height:82px;right:-14px;bottom:63px;font-size:23px}.sticker span{font-size:7px}.strip-inner{display:grid;grid-template-columns:1fr 1fr;font-size:10px;gap:12px;text-align:center;padding-block:19px}.strip-inner i{display:none}.subjects{padding-block:42px}.section-heading{display:block}h2{font-size:31px}.search{width:100%;margin-top:23px}.subject-grid{grid-template-columns:repeat(2,1fr);gap:9px;margin-top:20px}.subject{padding:16px;min-height:135px}.subject-title{font-size:12px}.subject-arrow{right:15px;bottom:18px}.catalog-note{font-size:10px}.how{grid-template-columns:1fr;gap:25px;padding-block:35px 40px}.how-title h2 br{display:none}.how-title p{max-width:none}.steps article{gap:16px}.end-card{display:block;padding:28px 25px}.end-card h2{font-size:29px}.end-card .cta{margin-top:8px;font-size:13px}.details{padding-block:28px 40px}footer{flex-wrap:wrap;justify-content:start;column-gap:30px;row-gap:15px}footer>span{order:3;width:100%}.dialog-heading h2{font-size:25px}dialog{padding:22px}#topics-list{grid-template-columns:1fr}dialog .cta{font-size:12px}}