.demo-page{background:#f5f8fc}.demo-header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100vw - 1192px)/2));background:#fff;border-bottom:1px solid var(--line)}.demo-hero{display:grid;grid-template-columns:1.4fr .6fr;gap:60px;align-items:center;max-width:1192px;margin:auto;padding:90px 22px 65px}.demo-hero h1{font-size:clamp(2.7rem,6vw,5.3rem);line-height:.98;letter-spacing:-.06em;margin:10px 0 22px}.demo-hero>div>p{max-width:760px;color:#53677c}.demo-hero>aside{background:#07111f;color:#fff;padding:28px;border-radius:20px}.demo-hero>aside p{color:#9db3c4;font-size:.84rem}.lesson-meta{display:flex;flex-wrap:wrap;gap:9px}.lesson-meta span{padding:8px 12px;border-radius:999px;background:#e6f8fc;color:#16768a;font-size:.73rem;font-weight:800}.demo-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px;max-width:1192px;margin:0 auto 90px;padding:0 22px}.demo-lesson{display:grid;gap:18px}.demo-lesson section,.demo-sidebar>div{background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px}.demo-lesson h2{font-size:clamp(1.6rem,3vw,2.35rem);line-height:1.12;margin:8px 0 18px}.formula{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:25px;padding:20px;background:#f1fafc;border-radius:14px}.formula b{color:#087f98}.method{list-style:none;padding:0;counter-reset:steps}.method li{display:grid;grid-template-columns:34px 1fr;gap:2px 14px;padding:15px 0;border-bottom:1px solid var(--line)}.method li::before{counter-increment:steps;content:counter(steps);grid-row:1/3;width:32px;height:32px;display:grid;place-items:center;border-radius:9px;background:#07111f;color:#60def2;font-weight:900}.method span{color:var(--muted);font-size:.84rem}.examples{display:grid;grid-template-columns:1fr 1fr;gap:14px}.examples>div{padding:20px;border-radius:14px}.examples small{font-weight:900;text-transform:uppercase;letter-spacing:.06em}.bad{background:#fff0f2}.bad small{color:#b63c4b}.good{background:#eafbf5}.good small{color:#087d57}.demo-lesson input[type=text],.demo-lesson section>input{width:100%;padding:13px 14px;border:1px solid #cddae5;border-radius:11px;margin:5px 0 15px;font:inherit}.demo-lesson label{font-size:.83rem;font-weight:800}.answer{min-height:64px;padding:16px;margin:5px 0 16px;border-radius:12px;background:#07111f;color:#fff}.demo-sidebar{display:grid;align-content:start;gap:16px;position:sticky;top:20px}.demo-sidebar>div{padding:24px}.demo-sidebar strong,.demo-sidebar span{display:block}.demo-sidebar span,.demo-sidebar p{color:var(--muted);font-size:.82rem}.demo-sidebar .button{width:100%;margin-top:10px}.mini-progress{height:7px;background:#dce9ef;border-radius:99px;margin-top:18px}.mini-progress i{display:block;width:1%;height:100%;background:#20bdd8;border-radius:inherit}.security-card{border-color:#bcebf2!important;background:#effbfc!important}.security-card strong{color:#087f98}fieldset{border:0;padding:0;margin:0 0 22px}legend{font-weight:850;margin-bottom:9px}fieldset label{display:block;padding:8px 0;color:#465a6d;font-weight:500!important}.quiz-result{padding:12px 0;margin:8px 0 0;font-weight:850;color:#087f98}@media(max-width:900px){.demo-hero,.demo-layout{grid-template-columns:1fr}.demo-sidebar{position:static;grid-template-columns:1fr 1fr}.security-card{grid-column:1/-1}}@media(max-width:620px){.demo-header{height:70px}.demo-hero{padding-top:55px}.demo-hero h1{font-size:3rem}.demo-layout{padding:0 15px}.demo-lesson section{padding:25px 20px}.examples,.demo-sidebar{grid-template-columns:1fr}.security-card{grid-column:auto}.formula{align-items:flex-start;flex-direction:column}footer{margin-top:0}}