/* Learning hub styles are scoped to this page; existing lessons retain their layouts. */
.study-page{--study-bg:#0d1024;--study-panel:#171b34;--study-line:#323853;--study-muted:#aeb8d3;--study-lilac:#c4b6ff;--study-green:#a9eed4;background:radial-gradient(ellipse at 85% 6%,#272049 0,transparent 35%),var(--study-bg);color:#f2f1ff;font-family:Inter,'Segoe UI',sans-serif}
.study-page *{box-sizing:border-box}.study-page a{color:inherit;text-decoration:none}.study-page button,.study-page input,.study-page select{font:inherit}.study-page [hidden]{display:none!important}
.study-page button,.study-page a,.study-page select{touch-action:manipulation}.study-page button{cursor:pointer}.study-page button:disabled{opacity:.6;cursor:wait}
.study-page a,.study-page button{ -webkit-text-fill-color:currentColor}.study-page :focus-visible{outline:3px solid #d0b9ff;outline-offset:4px}
.study-page p{line-height:1.6}.study-page h1,.study-page h2,.study-page h3,.study-page p{overflow-wrap:break-word}.study-page h1,.study-page h2,.study-page h3{font-family:inherit}
.study-header{position:relative;z-index:20;border-bottom:1px solid #ffffff14;background:#0d1024d9;padding:18px 28px}.study-header-inner{max-width:1240px;margin:auto;display:flex;align-items:center;gap:24px}
.study-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:750;letter-spacing:-.5px}.study-brand>span{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--study-lilac);color:#1f1938;font-size:20px}
.study-nav{display:flex;align-items:center;gap:22px;margin-left:auto;font-size:13px}.study-nav>a{display:flex;align-items:center;min-height:44px;color:var(--study-muted);white-space:nowrap}.study-nav>a:hover,.study-nav>a[aria-current]{color:#e1d9ff}
.study-nav>a[aria-current]{text-decoration:underline;text-underline-offset:8px;text-decoration-color:var(--study-lilac)}
.study-header .lang-switch{order:3;min-height:44px;min-width:60px;border:1px solid #62647d;background:#191d35;color:#f4f0ff;border-radius:8px;padding:8px}
.study-header .lang-switch option{background:#191d35;color:#fff}.study-header .header__account{gap:6px;flex-wrap:wrap;max-width:260px}.study-header .header__account-link{min-height:40px;display:flex;align-items:center;justify-content:center}
.study-menu-toggle{display:none;min-height:44px;border:1px solid #72758d;border-radius:8px;background:#20253e;color:#f2f1ff;padding:9px 13px}.study-menu-toggle:hover{background:#333d60;color:#fff}
.study-main{max-width:1240px;margin:auto;padding:0 28px}.study-main>section{scroll-margin-top:24px}.study-skip{position:fixed;top:12px;left:12px;z-index:1000;padding:12px 18px;border-radius:8px;background:#c4b6ff;color:#201a39!important;transform:translateY(-160%)}.study-skip:focus{transform:none}
.study-hero{display:grid;grid-template-columns:1.3fr 1fr;align-items:center;gap:60px;padding:65px 0 60px;min-height:460px}
.study-eyebrow{font-size:11px;letter-spacing:.16em;font-weight:700;color:var(--study-lilac);margin:0 0 13px}.study-hero h1{font-size:clamp(36px,4.8vw,63px);line-height:1.08;font-weight:750;letter-spacing:-.045em;max-width:590px;margin:0 0 22px;color:#f4f0ff}
.study-intro{font-size:16px;max-width:540px;color:var(--study-muted);margin:0}.study-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:29px}
.study-button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 19px;border:1px solid transparent;border-radius:10px;font-size:14px;font-weight:650;transition:background .15s,border-color .15s}
.study-page .study-button-primary{background:#c4b6ff;color:#241c43}.study-page .study-button-primary:hover{background:#dfd6ff;color:#241c43}
.study-page .study-button-secondary{background:#1c213c;border-color:#515773;color:#e3ddff}.study-page .study-button-secondary:hover{background:#333956;border-color:#b6a5ef;color:#fff}.study-hero-note{font-size:12px;color:#9da9c7;margin:18px 0 0}
.study-hero-art{position:relative;height:316px;isolation:isolate;pointer-events:none}.study-orbit{position:absolute;inset:4% -4%;border:1px solid #9d8ccb30;border-radius:50%;transform:rotate(-25deg)}
.study-orbit:after{content:'';position:absolute;inset:24px;border:1px dashed #9d8ccb30;border-radius:50%}.study-art-star{position:absolute;right:24px;top:2px;font-size:57px;color:#dac6ff}
.study-math-note{position:absolute;left:8%;top:0;width:245px;background:linear-gradient(145deg,#ddd1ff,#b8abf6);color:#2c2448;border-radius:22px;padding:24px 27px;transform:rotate(-8deg);box-shadow:0 24px 65px #0004}
.study-math-note>span{font-size:31px;font-weight:750;letter-spacing:-.02em}.study-dot-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:8px;margin:19px 0}.study-dot-grid i{width:9px;height:9px;border-radius:3px;background:#74639b}.study-math-note>strong{display:flex;justify-content:space-between;align-items:center;font-size:36px;line-height:1}
.study-math-note>strong>span{display:grid;place-items:center;font-size:20px;background:#7761a7;color:#fff;width:35px;height:35px;border-radius:50%}
.study-language-note{position:absolute;right:0;bottom:3px;display:flex;flex-direction:column;gap:7px;padding:22px 28px;background:#b9efdf;color:#193e3b;border-radius:17px;transform:rotate(9deg);box-shadow:0 18px 36px #0003;font-size:20px;font-weight:650;line-height:1.15}
.study-language-note>span:nth-child(2){opacity:.7;font-size:15px}.study-language-note>span:last-child{font-size:27px}.study-art-label{position:absolute;left:12px;bottom:-14px;letter-spacing:.15em;color:#afa0d2;font-size:24px}
.study-section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}.study-section-heading h2{font-size:27px;letter-spacing:-.03em;line-height:1.2;margin:0}.study-section-heading .study-eyebrow{margin-bottom:9px}
.study-device-note{font-size:12px;color:var(--study-muted);display:flex;gap:8px;align-items:center}.study-device-note:before{content:'';width:7px;height:7px;border-radius:50%;background:var(--study-green)}
.study-personal{padding:28px;background:#151a31;border:1px solid #363b59;border-radius:22px;margin-bottom:55px}.study-personal-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.study-continue{display:flex;flex-direction:column;align-items:flex-start;padding:23px 25px;border:1px solid #655c94;border-radius:15px;background:linear-gradient(125deg,#343058,#292742);color:#f4eeff!important;transition:background .15s,border-color .15s}
.study-continue:hover{background:linear-gradient(125deg,#443e6e,#343151);border-color:#c4b6ff}.study-small-label{font-size:10px;letter-spacing:.13em;color:#d4c6ff;font-weight:650;margin-bottom:13px}.study-continue>strong{font-size:25px;line-height:1.22;letter-spacing:-.025em}
.study-continue>p{font-size:13px;color:#c4bfd8;margin:13px 0 22px}.study-inline-action{font-size:13px;font-weight:650;color:#dfd0ff;margin-top:auto}
.study-progress-list{display:flex;flex-direction:column;justify-content:center;gap:0}.study-progress-list>a{display:flex;align-items:center;gap:14px;padding:15px 6px;border-bottom:1px solid #373c55;min-height:70px}.study-progress-list>a:last-child{border-bottom:0}.study-progress-list>a:hover{background:#252b48;color:#fff;border-radius:8px}
.study-progress-list>a>span{display:grid;place-items:center;width:38px;height:38px;flex-shrink:0;background:#292949;border-radius:10px;color:#c8b9ff;font-size:20px}.study-progress-list>a:nth-child(2)>span{background:#203e45;color:#adedd9}.study-progress-list>a:nth-child(3)>span{background:#403340;color:#f6c6b1}
.study-progress-list strong{font-size:14px;font-weight:600}.study-progress-list p{font-size:12px;color:var(--study-muted);margin:3px 0 0}.study-progress-list b{font-size:26px;font-weight:600;color:#dcd5fc;margin-left:auto;font-variant-numeric:tabular-nums}
.study-storage-note{font-size:11px;margin:18px 0 0;color:#9aa7c4;max-width:820px}.study-review{border-top:1px solid #41475f;margin-top:20px;padding-top:19px}.study-review>strong{font-size:14px}.study-review>div{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.study-review a{padding:12px;background:#272e4a;border:1px solid #49506d;border-radius:9px;font-size:13px}.study-review a:hover{background:#363e5e;color:#fff}.study-review a>span{display:block;font-size:10px;color:var(--study-green);margin-bottom:5px}
.study-catalog{margin-bottom:60px}.study-format-links{display:flex;gap:20px;font-size:13px;color:#c7bcf0}.study-format-links a{padding-block:12px}.study-format-links a:hover{color:#eee7ff;text-decoration:underline;text-underline-offset:5px}
.study-search-row{display:flex;gap:14px;margin-bottom:16px}.study-search{display:flex;align-items:center;gap:12px;flex:1;padding:0 17px;background:#181e35;border:1px solid #4b526d;border-radius:11px}.study-search>span[aria-hidden]{font-size:30px;color:#c7baf3}.study-search:focus-within{border-color:#c4b6ff;box-shadow:0 0 0 2px #c4b6ff33}
.study-search input{width:100%;min-width:0;height:52px;border:0;background:none;color:#f3efff;outline:none!important;box-shadow:none!important;font-size:14px}.study-search input::placeholder{color:#9da9c2}
.study-format{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--study-muted)}.study-format select{min-height:52px;min-width:155px;padding:10px 15px;border:1px solid #4b526d;background:#181e35;color:#efebff;border-radius:11px}
.study-filters{display:flex;flex-wrap:wrap;gap:8px}.study-filters button{border:1px solid #414a68;border-radius:8px;background:#171d34;color:#c2cbe0;padding:10px 13px;font-size:12px;min-height:42px}.study-filters button:hover{background:#303858;color:#fff;border-color:#afa1d7}
.study-filters button[aria-pressed=true]{background:#bcecdc;border-color:#bcecdc;color:#1d3835;font-weight:650}.study-filters button[aria-pressed=true]:hover{background:#d9fff1;color:#1d3835}
.study-catalog-meta{display:flex;justify-content:space-between;align-items:center;gap:15px;min-height:55px}.study-catalog-meta p{font-size:12px;color:#9eacc7;margin:0}.study-reset{border:0;background:none;color:#d4c6ff;font-size:12px;min-height:44px;padding:8px}.study-reset:hover{color:#fff;text-decoration:underline}
.study-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.study-card{--card-accent:#bcb0f9;display:flex;flex-direction:column;min-width:0;padding:22px;border:1px solid #383f5a;border-radius:15px;background:#181d34;min-height:255px;transition:border-color .15s,background .15s}
.study-card:hover{background:#232b46;border-color:var(--card-accent);color:#fff}.study-card--russian{--card-accent:#efc6b5}.study-card--world{--card-accent:#b6e7ca}.study-card--languages{--card-accent:#b5dafa}.study-card--chess{--card-accent:#ebd69d}.study-card--logic{--card-accent:#e6b7e7}
.study-card-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:19px}.study-card-icon{display:grid;place-items:center;width:43px;height:43px;border:1px solid #ffffff1c;border-radius:11px;background:#ffffff08;color:var(--card-accent);font-size:25px}
.study-card-format{font-size:11px;letter-spacing:.02em;color:#a7b5ce}.study-card h3{font-size:18px;line-height:1.25;letter-spacing:-.02em;margin:0 0 9px;color:#f0ecff}.study-card>p{font-size:13px;color:#b0bcd3;margin:0 0 18px}
.study-card-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;font-size:11px;color:#a6b4cf}.study-access{color:#f0d698;font-size:10px}.study-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #ffffff15;margin-top:17px;padding-top:14px;font-size:12px;color:var(--card-accent);min-height:31px}.study-card-bottom b{font-size:17px}
.study-show-more{margin:24px auto 0;display:flex;min-width:230px}.study-empty,.study-load-note{padding:25px;border:1px dashed #6a6387;border-radius:13px;text-align:center}.study-empty strong{font-size:21px}.study-empty p,.study-load-note p{font-size:14px;color:var(--study-muted)}
.study-load-note{margin-top:20px;background:#292333}.study-load-note p{margin-top:0}.study-section-intro{font-size:14px;color:var(--study-muted);margin:-8px 0 24px}
.study-paths{margin-bottom:48px}.study-path-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.study-path{padding:24px 21px;background:linear-gradient(130deg,#212744,#171e34);border:1px solid #3a415c;border-radius:17px}
.study-path--russian{background:linear-gradient(130deg,#312636,#201e32)}.study-path--world{background:linear-gradient(130deg,#1b3336,#192635)}
.study-path-icon{font-size:29px;color:#c8bcff;display:block;margin-bottom:16px}.study-path--russian .study-path-icon{color:#ecc3b1}.study-path--world .study-path-icon{color:#bcecd7}
.study-path h3{font-size:20px;line-height:1.25;margin:0 0 8px;letter-spacing:-.02em}.study-path>p{font-size:11px;color:var(--study-muted);margin:0 0 21px}.study-path ol{padding:0;list-style:none;margin:0}.study-path li+li{border-top:1px solid #ffffff12}
.study-path li a{display:flex;align-items:center;gap:11px;padding:12px 0;font-size:12px;min-height:57px;color:#d5dbeb}.study-path li a:hover{color:#fff;background:#ffffff08;border-radius:6px}.study-step-number{display:grid;place-items:center;border:1px solid #ffffff24;width:25px;height:25px;border-radius:50%;font-size:11px;flex-shrink:0;color:#c8c8df}.study-path li b{margin-left:auto;font-size:16px;font-weight:400}.study-path li small{display:block;font-size:10px;color:var(--study-green);margin-top:4px}
.study-help{display:flex;align-items:center;gap:20px;padding:25px 0 35px;border-top:1px solid #323a54}.study-help>span{font-size:33px;color:#b7a8eb}.study-help h2{font-size:17px;line-height:1.3;margin:0 0 6px}.study-help p{font-size:12px;color:var(--study-muted);max-width:620px;margin:0}.study-help>a{margin-left:auto;flex-shrink:0;font-size:12px;color:#c8bdf4;min-height:44px;display:flex;align-items:center}.study-help>a:hover{color:#fff;text-decoration:underline}
.study-footer{max-width:1184px;margin:auto;padding:25px 0 32px;border-top:1px solid #2c334c;display:flex;align-items:center;gap:30px;font-size:12px;color:#a7b4cd}.study-footer>a:first-child{color:#e1ddfa;font-weight:650;font-size:15px}.study-footer>a:last-child{margin-left:auto}.study-footer a:hover{color:#fff}
.study-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1150px){.study-header-inner{gap:16px}.study-nav{gap:14px}.study-nav>a{font-size:12px}.study-header .header__account{max-width:190px;font-size:11px}.study-hero{gap:30px}.study-hero-art{transform:scale(.9);transform-origin:center}.study-footer{margin:0 28px}}
@media(max-width:960px){.study-nav{display:none;position:absolute;left:20px;right:20px;top:calc(100% - 2px);padding:16px;background:#1b2139;border:1px solid #525572;border-radius:13px;box-shadow:0 18px 45px #0007}.study-nav.is-open{display:flex;flex-direction:column;align-items:stretch;gap:4px}.study-nav>a{padding:10px 14px;font-size:14px}.study-header .header__account{max-width:none;justify-content:flex-start;padding:10px;gap:12px}
.study-header .lang-switch{order:0;margin-left:auto}.study-menu-toggle{display:inline-flex;align-items:center;justify-content:center}.study-hero{grid-template-columns:1.2fr .9fr;gap:15px;padding:45px 0;min-height:410px}.study-hero-art{transform:scale(.75);transform-origin:left center}.study-language-note{right:-25px}.study-hero h1{font-size:44px}.study-hero-actions{gap:9px}.study-hero-actions .study-button{padding:12px;font-size:13px}.study-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.study-path-grid{grid-template-columns:1fr}.study-path{display:grid;grid-template-columns:40px 1fr 1.6fr;column-gap:18px;align-items:center;padding:22px}.study-path-icon{grid-row:1/3;margin:0}.study-path h3{font-size:20px}.study-path>p{grid-column:2;margin:0}.study-path ol{grid-column:3;grid-row:1/3}.study-help{flex-wrap:wrap}.study-help>a{margin-left:53px}.study-personal-grid{gap:18px}.study-continue{padding:20px}.study-continue>strong{font-size:23px}}
@media(max-width:640px){.study-header{padding:13px 16px}.study-header-inner{gap:10px}.study-brand{font-size:15px}.study-brand>span{width:30px;height:30px}.study-header .lang-switch{min-width:55px;padding:8px 4px}.study-menu-toggle{font-size:12px;padding:9px}.study-main{padding:0 18px}.study-hero{grid-template-columns:1fr;position:relative;padding:35px 0 30px;min-height:0}.study-hero-art{display:none}.study-eyebrow{font-size:9px;letter-spacing:.11em}.study-hero h1{font-size:40px;max-width:390px;line-height:1.1;letter-spacing:-.04em;margin-bottom:17px}.study-intro{font-size:14px;max-width:460px}.study-hero-actions{margin-top:23px}.study-hero-note{font-size:11px;margin-top:15px}
.study-section-heading{gap:12px;align-items:flex-start;margin-bottom:19px}.study-section-heading h2{font-size:23px}.study-section-heading .study-eyebrow{margin-bottom:8px}.study-device-note{font-size:10px;max-width:77px;flex-shrink:0;line-height:1.4}.study-device-note:before{display:none}
.study-personal{padding:20px 16px;border-radius:17px;margin-bottom:36px}.study-personal-grid{grid-template-columns:1fr;gap:10px}.study-continue{padding:20px}.study-continue>strong{font-size:23px}.study-continue>p{font-size:12px;margin:12px 0 17px}.study-progress-list>a{padding:13px 0}.study-progress-list strong{font-size:13px}.study-progress-list p{font-size:11px}.study-progress-list b{font-size:23px}.study-storage-note{font-size:10px;margin-top:13px}.study-review>div{flex-direction:column}
.study-search-row{flex-wrap:wrap;gap:11px}.study-search{flex-basis:100%;padding:0 12px}.study-search input{font-size:13px}.study-format{width:100%;justify-content:space-between}.study-format select{min-height:44px;flex:1;max-width:240px;font-size:13px}.study-filters{gap:6px}.study-filters button{padding:9px 11px;font-size:11px;min-height:44px}
.study-format-links{flex-direction:column;gap:0;font-size:11px}.study-format-links a{padding:5px 0}.study-cards{gap:11px}.study-card{padding:16px 13px;min-height:250px}.study-card h3{font-size:16px;line-height:1.27}.study-card>p{font-size:12px}.study-card-top{gap:6px;flex-wrap:wrap;margin-bottom:14px}.study-card-format{font-size:10px}.study-card-meta{font-size:10px}.study-card-icon{width:36px;height:36px;font-size:22px}.study-card-bottom{font-size:11px;margin-top:13px}.study-card-bottom b{font-size:15px}.study-catalog{margin-bottom:39px}
.study-path{display:block;padding:22px}.study-path-icon{margin-bottom:12px}.study-path h3{font-size:22px}.study-path>p{margin:0 0 16px}.study-path li a{font-size:13px;min-height:53px}.study-section-intro{font-size:13px}.study-help{align-items:flex-start;gap:12px;padding:22px 0}.study-help>span{font-size:27px}.study-help>div{flex:1}.study-help h2{font-size:16px}.study-help>a{margin-left:0;flex-basis:100%;justify-content:center;border:1px solid #514b71;border-radius:8px}.study-footer{margin:0 18px;gap:14px;flex-wrap:wrap;padding:22px 0;font-size:11px}.study-footer>span{order:3;flex-basis:100%}}
@media(max-width:380px){.study-main{padding:0 14px}.study-hero h1{font-size:35px}.study-hero-actions{flex-direction:column;align-items:stretch}.study-personal{padding:18px 14px}.study-cards{grid-template-columns:1fr}.study-card{padding:20px;min-height:0}.study-card-top{flex-wrap:nowrap}.study-card h3{font-size:19px}.study-card>p{font-size:13px}.study-card-meta,.study-card-bottom{font-size:12px}.study-card-format{font-size:11px}.study-section-heading h2{font-size:22px}}
@media(prefers-reduced-motion:reduce){.study-page *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.study-skip{clip-path:inset(100%)}.study-skip:focus{clip-path:none}
.study-header .header__account-link--primary{background:#d4c6ff;border-color:#d4c6ff;color:#211a3b;-webkit-text-fill-color:#211a3b}.study-header .header__account-link--primary:hover{background:#ece4ff;border-color:#ece4ff;color:#211a3b;-webkit-text-fill-color:#211a3b}