:root,[data-theme="light"]{--bg:#f6f8f5;--surface:#fff;--surface-2:#fbfcfa;--border:#e1e7df;--muted:#617066;--text:#20251f;--primary:#0a7a63;--primary-2:#11b87a;--primary-soft:#e5f5ef;--gold:#d7a40f;--danger:#b73535;--success:#15835f;--shadow:0 12px 34px rgba(31,41,35,.08);--radius:22px;--font:Satoshi,Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;width:100%;max-width:100%;overflow-x:hidden}body{margin:0;width:100%;max-width:100%;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px}button,input,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}.skip-link{position:absolute;left:-999px}.skip-link:focus{left:12px;top:12px;z-index:999;background:#fff;padding:10px;border-radius:10px}.app{display:grid;grid-template-columns:320px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;overflow:auto;background:var(--surface);border-right:1px solid var(--border);padding:22px 18px;display:flex;flex-direction:column;gap:18px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--primary-2),var(--primary));display:grid;place-items:center;color:#fff;font-weight:900;font-size:22px;box-shadow:0 10px 22px rgba(10,122,99,.22)}.brand-mark.big{width:56px;height:56px;margin:0 auto 14px;border-radius:18px;font-size:30px}.brand-title{font-weight:900;font-size:18px}.brand-sub{font-size:12px;color:var(--muted);font-weight:700}.progress-card,.panel,.about-modal,.lesson-sheet{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.progress-card{padding:16px}.nav-title{font-size:12px;color:var(--muted);font-weight:900;letter-spacing:.12em;text-transform:uppercase;margin-bottom:10px}.progress-main{display:flex;align-items:flex-end;gap:8px}.progress-main strong{font-size:32px;line-height:1}.progress-main span{color:var(--muted);padding-bottom:5px}.progress-bar{height:9px;background:#eef2ed;border-radius:999px;overflow:hidden;margin:13px 0}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-2));border-radius:999px;width:0}.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:14px}.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.btn-row.compact{margin-top:12px}.btn{border:0;border-radius:15px;min-height:44px;padding:11px 16px;font-weight:900;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:disabled{opacity:.45;cursor:not-allowed}.btn-secondary{background:#f1f4ef;color:var(--text)}.btn-ghost{background:var(--primary-soft);color:var(--primary)}.btn.full{width:100%}.icon-btn{width:38px;height:38px;border:0;border-radius:12px;background:#f0f3ef;font-size:22px;color:var(--text)}.course-switcher{display:grid;gap:8px}.course-pill{display:flex;gap:10px;align-items:center;text-align:left;border:1px solid var(--border);background:var(--surface-2);border-radius:16px;padding:11px;color:var(--text);font-weight:900}.course-pill span{font-size:20px}.course-pill small{display:block;color:var(--muted);font-weight:700;margin-top:2px}.course-pill.active{background:var(--primary-soft);color:var(--primary);border-color:#b9e4d5}.lesson-nav{display:grid;gap:8px}.lesson-link{border:0;background:transparent;text-align:left;border-radius:16px;padding:12px;display:grid;grid-template-columns:28px 1fr;gap:10px;color:var(--text)}.lesson-link:hover,.lesson-link.active{background:var(--primary-soft)}.lesson-link .num{width:28px;height:28px;border-radius:10px;background:#edf2ec;display:grid;place-items:center;font-weight:900;color:var(--primary)}.lesson-link b{line-height:1.25}.lesson-link small{color:var(--muted);line-height:1.35}.content{min-width:0}.topbar{position:sticky;top:0;z-index:50;background:rgba(246,248,245,.82);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:14px 24px;display:flex;justify-content:space-between;align-items:center;gap:18px}.mobile-brand{display:flex;align-items:center;gap:12px}.mobile-brand b{display:block}.mobile-brand span{display:block;font-size:13px;color:var(--muted);font-weight:700}.top-actions{display:flex;align-items:center;gap:10px}.chip{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:8px 12px;border-radius:999px;background:#e6f4ef;color:#0d5e4e;font-weight:900;font-size:13px}.main{padding:clamp(14px,2vw,28px);display:grid;gap:18px;min-width:0;max-width:100%}.catalog-head{text-align:center;margin:10px auto 28px;max-width:860px}.catalog-head h1{font-size:clamp(32px,4vw,54px);line-height:1.05;margin:0 0 10px}.catalog-head p{color:var(--muted);font-size:18px;line-height:1.55}.filter-row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}.filter{border:0;border-radius:999px;padding:12px 18px;background:#e9ece8;color:var(--text);font-weight:800}.filter.active{background:var(--text);color:#fff}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.course-card{border:0;background:transparent;text-align:left;display:grid;gap:12px;min-width:0}.course-visual{position:relative;height:220px;border-radius:24px;background:linear-gradient(135deg,#f0f1fb,#f7f8ff);overflow:hidden;display:grid;place-items:center;color:var(--accent,var(--primary))}.course-visual svg{width:82%;height:82%}.course-badge{position:absolute;left:16px;top:16px;background:#fff;border:1px solid #cbd2ce;border-radius:10px;padding:8px 12px;font-weight:900;font-size:13px}.course-card h3{font-size:22px;margin:0;line-height:1.2}.course-card p{margin:0;color:var(--muted);line-height:1.45}.course-progress{display:grid;gap:8px;margin-top:2px}.course-progress div:first-child{display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--muted);font-size:13px}.course-progress strong{color:var(--text)}.course-progress span{white-space:nowrap}.mini-progress{height:8px;background:#edf2ec;border-radius:999px;overflow:hidden}.mini-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-2));border-radius:999px}.course-card:hover h3{color:var(--primary)}.lesson-view{display:grid;gap:18px}.lesson-panel{padding:0;overflow:hidden}.lesson-hero{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;padding:26px}.lesson-hero h2{font-size:clamp(30px,3.5vw,48px);line-height:1.05;margin:10px 0}.lesson-hero p{font-size:18px;color:var(--muted);line-height:1.55;margin:0}.lesson-visual{border-radius:22px;background:linear-gradient(135deg,var(--primary-soft),#f7fbf7);display:grid;place-items:center;min-height:190px;color:var(--primary);overflow:hidden}.lesson-visual svg{width:86%;height:86%}.lesson-body{padding:0 26px 26px;display:grid;gap:14px}.content-block{padding:18px;border:1px solid var(--border);border-radius:18px;background:var(--surface-2)}.content-block h4{margin:0 0 8px;font-size:20px}.content-block p{margin:0 0 10px;color:var(--muted);line-height:1.7}.content-block p:last-child{margin-bottom:0}.remember{background:linear-gradient(135deg,#ecf8f3,#fff);border-color:#bce5d6}.remember ul,.practice-list{margin:0;padding-left:18px;color:var(--muted);line-height:1.65}.akbf-screen{display:grid;grid-template-columns:190px 1fr;gap:18px;align-items:center;background:#101b31;color:#fff;border-color:#1c2c4b}.akbf-screen h4,.akbf-screen p{color:#fff}.mock-phone{width:150px;aspect-ratio:9/16;background:#081127;border-radius:26px;border:8px solid #1d2942;padding:12px;margin:auto;box-shadow:0 16px 34px rgba(0,0,0,.22)}.mock-bar{height:8px;background:#15c487;border-radius:99px;margin:8px 0}.mock-row{height:28px;background:#17243d;border-radius:10px;margin:8px 0}.mock-cta{height:34px;background:#15c487;border-radius:12px;margin-top:12px}.widget,.practice-panel,.test-panel,.completion-panel{padding:22px}.section-head{display:flex;justify-content:space-between;gap:14px;margin-bottom:16px}.section-head h3,.widget h3,.practice-panel h3,.test-panel h3,.completion-panel h3{margin:0;font-size:26px}.panel-intro{color:var(--muted);line-height:1.55;margin:6px 0 0}.widget-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{display:grid;gap:8px}.field span{font-weight:900}.range-line{display:flex;justify-content:space-between;gap:12px}.range-value{color:var(--primary);font-weight:900}.field input[type="range"]{width:100%;accent-color:var(--primary)}.field input[type="text"]{width:100%;min-height:48px;border:1px solid var(--border);border-radius:14px;padding:12px;background:var(--surface-2);color:var(--text)}.result-box{margin-top:16px;background:#0d1730;color:#fff;border-radius:18px;padding:18px}.result-box strong{display:block;color:#75f0c0;font-size:24px;margin-bottom:6px}.check-row{display:flex;gap:10px;align-items:flex-start;margin:10px 0;color:var(--muted)}.check-row input{margin-top:4px;accent-color:var(--primary)}.test-list{display:grid;gap:14px}.test-card{border:1px solid var(--border);border-radius:18px;background:var(--surface-2);padding:16px}.test-q{font-weight:900;margin-bottom:12px}.answer-btn{display:block;width:100%;text-align:left;border:1px solid var(--border);background:#fff;border-radius:14px;padding:12px;margin:8px 0;color:var(--text)}.answer-btn.correct{border-color:#2fbf85;background:#e8f8f1}.answer-btn.wrong{border-color:#e36b6b;background:#fff0f0}.answer-expl{margin-top:10px;color:var(--muted);line-height:1.55}.lesson-actions{display:flex;justify-content:space-between;gap:10px;margin-top:16px}.completion-wrap{display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:26px;align-items:start}.completion-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0}.mini-card{border:1px solid var(--border);border-radius:18px;padding:14px;background:var(--surface-2)}.mini-card strong{display:block;font-size:22px}.mini-card span{color:var(--muted);font-size:13px}.certificate-preview{display:grid;place-items:center}.certificate-shell{position:relative;width:min(100%,420px);aspect-ratio:210/297;background:linear-gradient(180deg,#fffdf7,#f2fbf6);border:1px solid #d4e5db;border-radius:18px;padding:34px 30px;overflow:hidden;box-shadow:0 18px 45px rgba(25,37,30,.14);display:grid;grid-template-rows:auto auto auto auto minmax(0,1fr) auto}.cert-pattern{position:absolute;inset:0;background:radial-gradient(circle at 20% 10%,rgba(10,122,99,.1),transparent 28%),radial-gradient(circle at 90% 0%,rgba(215,164,15,.14),transparent 30%);pointer-events:none}.certificate-top,.certificate-title,.certificate-subtitle,.certificate-course,.certificate-name,.certificate-text,.certificate-bottom{position:relative}.certificate-top{text-transform:uppercase;letter-spacing:.18em;color:var(--primary);font-size:12px;font-weight:900}.certificate-title{font-size:44px;font-weight:900;margin-top:24px}.certificate-subtitle{font-size:17px;color:var(--muted)}.certificate-course{font-size:18px;font-weight:900;margin-top:12px}.certificate-name{font-size:25px;font-weight:900;margin-top:28px;padding:14px 0;border-top:1px solid rgba(10,122,99,.28);border-bottom:1px solid rgba(10,122,99,.28)}.certificate-text{align-self:center;color:#526158;line-height:1.55}.certificate-bottom{display:grid;grid-template-columns:1fr 1fr;gap:14px}.certificate-bottom strong{display:block;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);font-size:11px}.certificate-bottom span{font-weight:900}.footer-note{color:var(--muted);font-size:13px;line-height:1.5}.bottom-nav,.lesson-sheet,.lesson-sheet-backdrop{display:none}.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.34);z-index:100}.about-modal{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);z-index:101;width:min(92vw,760px);padding:24px}.about-head{display:flex;justify-content:space-between;gap:16px}.about-modal h2{font-size:32px;margin:0}.about-modal p{color:var(--muted);line-height:1.65}.about-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.splash{position:fixed;inset:0;background:var(--bg);z-index:200;display:grid;place-items:center;transition:.25s}.splash.hidden{opacity:0;pointer-events:none}.splash-card{text-align:center;background:#fff;border:1px solid var(--border);border-radius:24px;padding:28px;box-shadow:var(--shadow)}.splash-title{font-weight:900;font-size:22px}.splash-sub{color:var(--muted)}.loader{display:flex;justify-content:center;gap:6px;margin-top:14px}.loader span{width:7px;height:7px;border-radius:50%;background:var(--primary);animation:pulse 1s infinite}.loader span:nth-child(2){animation-delay:.15s}.loader span:nth-child(3){animation-delay:.3s}@keyframes pulse{50%{opacity:.3;transform:translateY(-4px)}}.desktop-only{display:inline-flex}@media(max-width:1180px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.completion-wrap{grid-template-columns:1fr}.lesson-hero{grid-template-columns:1fr}.lesson-visual{min-height:130px}.akbf-screen{grid-template-columns:1fr}.mock-phone{display:none}}@media(max-width:920px){body{padding-bottom:78px}.app{display:block}.sidebar{display:none}.desktop-only{display:none!important}.topbar{padding:12px 14px}.main{padding:14px;gap:14px}.catalog-head{text-align:left;margin:0 0 18px}.catalog-head h1{font-size:32px}.catalog-head p{font-size:15px}.filter-row{justify-content:flex-start;overflow:auto;flex-wrap:nowrap;padding-bottom:4px}.filter{white-space:nowrap}.course-grid{grid-template-columns:1fr;gap:18px}.course-visual{height:170px}.lesson-hero{padding:18px}.lesson-hero h2{font-size:30px}.lesson-hero p{font-size:15px}.lesson-body{padding:0 18px 18px}.panel,.progress-card,.about-modal,.lesson-sheet{border-radius:18px;max-width:100%}.widget,.practice-panel,.test-panel,.completion-panel{padding:18px}.widget-grid,.completion-kpis{grid-template-columns:1fr}.section-head{display:block}.lesson-actions{position:sticky;bottom:86px;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);padding:10px;margin:14px 0 0;border-radius:16px;border:1px solid var(--border)}.lesson-actions .btn{flex:1}.bottom-nav{position:fixed;left:0;right:0;bottom:0;width:100%;max-width:100vw;z-index:80;display:grid;grid-template-columns:repeat(5,1fr);gap:4px;padding:8px 8px calc(8px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--border)}.bottom-link{display:grid;gap:2px;place-items:center;background:transparent;border:0;border-radius:14px;padding:7px 2px;color:var(--muted);font-weight:900}.bottom-link span{font-size:20px;line-height:1}.bottom-link b{font-size:11px}.bottom-link.active{background:var(--primary-soft);color:var(--primary)}.lesson-sheet-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.25);z-index:90}.lesson-sheet{display:block;position:fixed;left:8px;right:8px;bottom:82px;z-index:91;max-height:72vh;overflow:auto;padding:12px}.sheet-handle{width:44px;height:4px;background:var(--border);border-radius:999px;margin:0 auto 10px}.sheet-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.sheet-head span{display:block;color:var(--muted);font-size:12px;margin-top:2px}.lesson-sheet-list{display:grid;gap:8px}.lesson-sheet .lesson-link{padding:12px}.about-grid{grid-template-columns:1fr}.certificate-shell{width:min(100%,350px)}}@media(max-width:560px){.btn-row,.lesson-actions{display:grid;grid-template-columns:1fr}.btn{width:100%}.course-card h3{font-size:21px}.course-visual{height:150px}.certificate-title{font-size:36px}.certificate-name{font-size:20px}.top-actions .chip{display:none}}


/* ecosystem-v4: richer lesson reading layout */
.lesson-body{display:grid;gap:14px;margin-top:18px}
.narrative-block p,.opening-block p,.example-block p{font-size:16px;line-height:1.72;color:var(--text)}
.key-block{background:linear-gradient(135deg,rgba(21,185,133,.10),rgba(255,255,255,.88));border-color:rgba(21,185,133,.22)}
.lesson-bullets{margin:0;padding-left:20px;display:grid;gap:8px;color:var(--text)}
.lesson-bullets li{line-height:1.55}
.example-block{background:#fff8e5;border-color:rgba(209,153,0,.28)}
.example-block h4::before{content:'Живой пример';display:inline-flex;margin-right:8px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#8a6400;background:rgba(209,153,0,.14);border-radius:999px;padding:4px 8px;vertical-align:middle}
.client-screen{display:grid;grid-template-columns:160px minmax(0,1fr);align-items:center;gap:18px;background:#f7fbf8}
@media(max-width:760px){.client-screen{grid-template-columns:1fr}.client-screen .mock-phone{max-width:180px;margin:0 auto}.narrative-block p,.opening-block p,.example-block p{font-size:15px;line-height:1.65}}

/* ecosystem-v5 fixes */
.concepts{display:none!important}
.course-pill{min-width:0}.course-pill div{min-width:0}.course-pill small{white-space:normal}.lesson-hero>*{min-width:0}.lesson-view,.catalog-view{min-width:0;max-width:100%}
@media(max-width:920px){.content{width:100%;max-width:100vw;overflow-x:hidden}.topbar{width:100%;max-width:100vw}.course-grid,.lesson-view{width:100%;max-width:100%}.lesson-panel,.widget,.practice-panel,.test-panel,.completion-panel{width:100%;max-width:100%;overflow:hidden}.lesson-hero{grid-template-columns:minmax(0,1fr);gap:14px}.lesson-body{padding:0 14px 14px}.content-block{padding:15px}.catalog-head h1{font-size:30px}.course-progress div:first-child{display:grid;gap:2px}.course-progress span{white-space:normal}.lesson-sheet{left:10px;right:10px;max-width:calc(100vw - 20px)}}
@media(max-width:420px){.main{padding:10px}.lesson-hero{padding:14px}.widget,.practice-panel,.test-panel,.completion-panel{padding:14px}.course-visual{height:132px}.bottom-link b{font-size:10px}.bottom-link span{font-size:18px}}