:root{--red:#e00000;--green:#07a568;--green2:#078652;--ink:#17211d;--muted:#64716b;--bg:#f5f8f7;--line:#dfe8e3;--card:#fff;--amber:#f2a900;--purple:#7c4dff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55}a{color:inherit}.container{width:min(1180px,calc(100% - 32px));margin:auto}.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.top-inner{min-height:70px;display:flex;align-items:center;gap:30px}.brand{text-decoration:none;font-size:25px;font-weight:900;letter-spacing:-1.1px;white-space:nowrap}.turbo{color:var(--red)}.uroki{color:var(--green)}.nav{margin-left:auto;display:flex;gap:18px;align-items:center;font-size:14px;font-weight:700}.nav a{text-decoration:none}.nav a:hover,.nav a.active{color:var(--green)}.hero{padding:54px 0 38px;background:linear-gradient(135deg,#fff 0%,#f1faf6 62%,#fff5f5 100%);border-bottom:1px solid var(--line)}.crumbs{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:14px;margin-bottom:16px}.crumbs a{text-decoration:none}.eyebrow{display:inline-flex;padding:7px 11px;border-radius:999px;background:#e9f8f1;color:#06764a;font-weight:800;font-size:13px}.hero h1{font-size:clamp(36px,6vw,64px);line-height:1.02;letter-spacing:-2.5px;margin:15px 0 13px}.hero h1 span{color:var(--green)}.hero p{max-width:800px;color:var(--muted);font-size:18px;margin:0}.stats{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 14px;font-weight:800}.layout{display:grid;grid-template-columns:280px 1fr;gap:26px;padding:32px 0 60px}.side{position:sticky;top:92px;align-self:start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}.side h3{margin:0 0 12px;font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.filters{display:grid;gap:8px}.filter{border:1px solid var(--line);background:#fff;border-radius:11px;padding:10px 12px;text-align:left;font-weight:800;cursor:pointer}.filter.active{border-color:var(--green);background:#ecfaf4;color:#06764a}.progress{margin-top:18px}.bar{height:9px;border-radius:99px;background:#edf2ef;overflow:hidden}.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--red),var(--green));transition:.25s}.progress-row{display:flex;justify-content:space-between;font-size:13px;margin:7px 0;color:var(--muted)}.content h2{font-size:28px;margin:0 0 8px}.content-lead{color:var(--muted);margin:0 0 22px}.module{margin:28px 0 12px;display:flex;align-items:center;gap:10px}.module:after{content:"";height:1px;background:var(--line);flex:1}.module h3{margin:0;font-size:18px}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.lesson-card{display:block;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;transition:.18s}.lesson-card:hover{transform:translateY(-2px);box-shadow:0 10px 25px rgba(15,50,35,.08);border-color:#b9d9ca}.card-top{display:flex;justify-content:space-between;gap:10px;align-items:center}.n{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:900;background:#ecfaf4;color:#06764a}.badge{font-size:12px;padding:5px 9px;border-radius:999px;font-weight:800}.badge.base{background:#eef8f3;color:#06764a}.badge.advanced{background:#fff6df;color:#9a6500}.badge.high{background:#f2ebff;color:#6133c7}.lesson-card h4{font-size:18px;margin:13px 0 6px}.lesson-card p{margin:0;color:var(--muted);font-size:14px}.done-mark{margin-top:13px;font-size:12px;font-weight:800;color:var(--green);display:none}.lesson-card.done .done-mark{display:block}.search{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;font:inherit;margin-bottom:12px;outline:none}.search:focus{border-color:var(--green)}.notice{background:#fff;border:1px solid var(--line);border-left:4px solid var(--green);border-radius:14px;padding:16px;margin-top:26px}.footer{border-top:1px solid var(--line);background:#fff}.footer-inner{min-height:90px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted)}
/* lesson */.lesson-wrap{padding:34px 0 60px}.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px}.lesson-main{min-width:0}.lesson-head{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;margin-bottom:18px}.lesson-kicker{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.lesson-head h1{font-size:clamp(28px,5vw,44px);line-height:1.1;letter-spacing:-1.5px;margin:13px 0 9px}.lesson-head p{color:var(--muted);font-size:17px;margin:0}.section-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;margin:14px 0}.section-card h2{font-size:22px;margin:0 0 12px}.rules{display:grid;gap:9px;margin-top:14px}.rule{padding:11px 13px;background:#f5faf7;border-radius:11px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700}.steps{counter-reset:st;display:grid;gap:10px;padding:0;margin:0;list-style:none}.steps li{position:relative;padding:12px 12px 12px 48px;background:#fafcfb;border:1px solid var(--line);border-radius:12px}.steps li:before{counter-increment:st;content:counter(st);position:absolute;left:12px;top:10px;width:26px;height:26px;border-radius:8px;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:900}.example{border-left:4px solid var(--red);background:#fff7f7}.practice{border-top:5px solid var(--green)}.practice label{font-weight:800;display:block;margin-bottom:8px}.answer-row{display:flex;gap:9px;flex-wrap:wrap}.answer{flex:1;min-width:180px;padding:12px 13px;border:1px solid #ccd9d2;border-radius:11px;font:inherit}.btn{border:0;border-radius:11px;padding:12px 16px;font-weight:900;cursor:pointer;background:var(--green);color:#fff}.btn.secondary{background:#edf4f0;color:#1b3d2e}.feedback{margin-top:11px;font-weight:800}.feedback.ok{color:#057247}.feedback.bad{color:#b42121}.lesson-side{position:sticky;top:92px;align-self:start}.side-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:17px;margin-bottom:13px}.side-card h3{margin:0 0 10px;font-size:15px}.meta-list{display:grid;gap:9px;font-size:14px}.meta-row{display:flex;justify-content:space-between;gap:12px}.meta-row span:first-child{color:var(--muted)}.nav-lessons{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}.nav-lessons a{text-decoration:none;text-align:center;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff;font-weight:800}.complete{width:100%;margin-top:10px}.complete.done{background:#125c43}.high-note{background:#f6f0ff;border-color:#ddcdfb}.high-note strong{color:#6030c2}@media(max-width:900px){.nav{display:none}.layout,.lesson-grid{grid-template-columns:1fr}.side,.lesson-side{position:static}.cards{grid-template-columns:1fr}.footer-inner{flex-direction:column;justify-content:center;text-align:center}.hero{padding-top:38px}}@media(max-width:520px){.container{width:min(100% - 22px,1180px)}.hero h1{letter-spacing:-1.5px}.lesson-head,.section-card{padding:18px}.answer-row{display:grid}.btn{width:100%}}