:root{
  --bg:#FFFFFF;--bg2:#F8FAFC;--ink:#0F172A;--ink2:#334155;--muted:#64748B;--line:#E2E8F0;
  --brand:#0B5FFF;--brand-d:#0046D1;--brand-50:#EAF3FF;--brand-100:#DCEBFF;
  --grad:linear-gradient(90deg,#2563EB,#00A3FF);--grad-txt:linear-gradient(90deg,#0B5FFF,#1A8CFF 55%,#0EA5E9);
  --r:18px;--shadow:0 10px 30px -12px rgba(15,23,42,.18)
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Be Vietnam Pro",system-ui,sans-serif;background:var(--bg);color:var(--ink2);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit}
h1,h2,h3,h4{font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;color:var(--ink);letter-spacing:-.02em}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
svg.i{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
/* top bar & header */
.topbar{background:var(--grad);color:#fff;text-align:center;font-size:13px;padding:7px 16px}
.topbar b{background:rgba(255,255,255,.22);border-radius:999px;padding:1px 9px;margin-right:6px;font-size:11px;letter-spacing:.04em}
header{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 4px 20px -12px rgba(15,23,42,.18)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0}
.menu{display:flex;gap:2px}
.menu a{padding:8px 14px;border-radius:999px;font-weight:500;font-size:15px;color:#475569;white-space:nowrap;transition:.15s}
.menu a:hover{background:#F1F5F9;color:var(--ink)}
.menu a.on{background:var(--brand-50);color:var(--brand);font-weight:600}
.cta{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;border-radius:999px;padding:11px 20px;font-weight:600;font-size:15px;box-shadow:0 8px 20px -6px rgba(11,95,255,.5);transition:.2s;border:0;cursor:pointer}
.cta:hover{background:var(--brand-d);transform:translateY(-1px)}
.cta.ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.cta.ghost:hover{border-color:var(--brand);color:var(--brand)}
.burger{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;width:42px;height:42px;cursor:pointer;place-items:center}
.nav-right{display:flex;gap:10px;align-items:center}
@media(max-width:1020px){.menu{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 16px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}.menu.open{display:flex}.burger{display:grid}.nav-right .cta{display:none}}
/* common */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-50);border:1px solid var(--brand-100);padding:5px 13px;border-radius:999px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--brand)}
.gt{background:var(--grad-txt);-webkit-background-clip:text;background-clip:text;color:transparent}
section{padding:80px 0}
.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sh{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:34px;flex-wrap:wrap}
.sh h2{font-size:clamp(26px,3vw,34px);line-height:1.2}
.sh p{color:var(--muted);margin-top:6px}
.sh.c{flex-direction:column;align-items:center;text-align:center}
.link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.link svg{width:17px;height:17px}
/* hero */
.hero{padding:72px 0 80px;background:radial-gradient(900px 400px at 85% 10%,#EAF3FF 0,transparent 60%),radial-gradient(700px 360px at 0% 100%,#F0F8FF 0,transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:32px;align-items:center}
.hero-grid>*{min-width:0}
.hero h1{font-size:clamp(36px,5vw,58px);line-height:1.1;font-weight:800;margin:20px 0}
.hero .sub{color:#475569;max-width:560px}
.search{margin-top:30px;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:7px 7px 7px 16px;max-width:560px;box-shadow:0 4px 16px -8px rgba(15,23,42,.12)}
.search svg{color:#94A3B8}
.search input{flex:1;border:0;outline:0;font-size:15px;min-width:0;background:transparent}
.search .cta{border-radius:12px;padding:11px 18px;box-shadow:none}
.hot{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:14px;font-size:13px;color:var(--muted)}
.hot a{background:#F1F5F9;border-radius:8px;padding:4px 10px;color:#475569}
.hot a:hover{background:var(--brand-50);color:var(--brand)}
.stats{display:flex;gap:44px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line);flex-wrap:wrap}
.stats b{display:block;font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;font-size:28px;color:var(--ink);line-height:1.2}
.stats span{font-size:13px;color:var(--muted)}
.chat{background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:0 30px 60px -24px rgba(11,95,255,.28)}
.chat-top{display:flex;align-items:center;gap:7px;padding-bottom:14px;border-bottom:1px solid #F1F5F9;margin-bottom:16px}
.chat-top i{width:11px;height:11px;border-radius:50%;display:block}
.chat-top span{margin-left:auto;font-family:ui-monospace,monospace;font-size:12px;color:#94A3B8}
.msg{padding:12px 15px;border-radius:16px;font-size:14px;max-width:88%;margin-bottom:12px;line-height:1.55}
.msg.bot{background:#F1F5F9;color:var(--ink2)}
.msg.me{background:var(--brand);color:#fff;margin-left:auto;border-bottom-right-radius:6px}
.sug{background:var(--bg2);border:1px solid var(--line);border-radius:16px;padding:14px}
.sug small{font-weight:600;color:var(--brand);font-size:13px}
.sug a{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-top:10px;font-size:14px;color:var(--ink);transition:.15s}
.sug a:hover{border-color:var(--brand)}
.sug a svg:last-child{margin-left:auto;color:#94A3B8;width:16px;height:16px}
.tile{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;color:#fff;flex-shrink:0}
.tile svg{width:22px;height:22px}
.tile.sm{width:34px;height:34px;border-radius:10px}.tile.sm svg{width:17px;height:17px}

@media(max-width:940px){.hero-grid{grid-template-columns:minmax(0,1fr)}.hero{padding:44px 0 56px}.stats{gap:28px}}

.hero{padding:56px 0 64px;background:radial-gradient(700px 380px at 85% 40%,#DCEBFF 0,transparent 70%),linear-gradient(180deg,#F5F7FF 0%,#EAF3FF 100%);border-bottom:1px solid #DCEBFF}
.kicker{font-size:13px;letter-spacing:.32em;text-transform:uppercase;color:#64748B;font-weight:600;margin-bottom:18px}
.hero h1{font-size:clamp(38px,4.9vw,64px);white-space:nowrap;line-height:1.08;margin:0;letter-spacing:-.035em}
.search{margin-top:32px;padding:8px 8px 8px 20px;border-radius:20px;max-width:520px}
.search input{font-size:16px;padding:10px 0}
.go-btn{width:50px;height:50px;border-radius:14px;border:0;background:var(--brand);color:#fff;display:grid;place-items:center;cursor:pointer;flex-shrink:0;transition:.2s}
.go-btn:hover{background:var(--brand-d)}
.search .go-btn svg{width:22px;height:22px;color:#fff}
.scene{position:relative;perspective:1600px;padding:24px 16px 36px 24px}
.dash{display:flex;background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:0 50px 90px -40px rgba(11,95,255,.45),0 10px 30px -10px rgba(15,23,42,.12);transform:rotateY(-14deg) rotateX(6deg) rotateZ(1deg);transform-origin:left center}
.side{width:52px;background:#1E293B;display:flex;flex-direction:column;align-items:center;gap:14px;padding:16px 0}
.side span{width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,#2F7BFF,#22D3EE);margin-bottom:6px}
.side i{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:#94A3B8}
.side i.on{background:rgba(255,255,255,.12);color:#fff}
.side svg{width:16px;height:16px}
.main{flex:1;padding:16px;background:#F8FAFC;display:flex;flex-direction:column;gap:10px;min-width:0}
.d-top{display:flex;justify-content:space-between;align-items:center}
.d-top b{font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;color:var(--ink);font-size:15px}
.d-top span{font-size:10px;color:#64748B;background:#fff;border:1px solid var(--line);border-radius:8px;padding:3px 8px}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.kpi{background:#fff;border-radius:12px;padding:10px;display:flex;gap:8px;align-items:center;box-shadow:0 1px 3px rgba(15,23,42,.05)}
.kpi em{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;flex-shrink:0}
.kpi em svg{width:15px;height:15px}
.kpi small{display:block;font-size:9px;color:#64748B;line-height:1.2}
.kpi b{display:block;font-size:16px;color:var(--ink);line-height:1.2}
.kpi u{text-decoration:none;font-size:9px;color:#16A34A;font-weight:600}
.charts{display:grid;grid-template-columns:1.6fr 1fr;gap:8px}
.box{background:#fff;border-radius:12px;padding:10px;box-shadow:0 1px 3px rgba(15,23,42,.05)}
.box small{display:block;font-size:10px;font-weight:600;color:var(--ink);margin-bottom:6px}
.box>svg{width:100%;height:78px;display:block}
.donut svg{width:78px;height:78px;margin:0 auto;display:block;transform:rotate(-90deg)}
.bar-row{display:flex;align-items:flex-end;gap:5px;height:56px}
.bar-row i{flex:1;background:#BFD8FF;border-radius:4px 4px 0 0}
.fl{position:absolute;background:#fff;border:1px solid var(--line);box-shadow:0 20px 40px -18px rgba(15,23,42,.35);border-radius:20px;animation:bob 6s ease-in-out infinite}
.fl-a{top:0;left:0;padding:10px}
.fl-a .tile{width:58px;height:58px;border-radius:16px}.fl-a .tile svg{width:28px;height:28px}
.fl-b{bottom:10px;left:-10px;width:240px;padding:16px 18px;display:flex;flex-direction:column;gap:9px;animation-delay:-2s}
.fl-b b{font-size:15px;color:var(--ink);display:flex;align-items:center;gap:8px}
.fl-b i{display:block;height:8px;border-radius:6px;background:#E2E8F0}
.spk2{position:absolute;top:14px;left:16px;color:#00A3FF}.spk2 svg{width:20px;height:20px;fill:#7CC4FF;stroke:#00A3FF}
.fl-b b{padding-left:28px}
.fl-c{bottom:16px;right:0;padding:16px;animation-delay:-4s}
.spk3 svg{width:40px;height:40px;fill:url(#none);fill:#1A8CFF;stroke:#2F7BFF;stroke-width:1}
@keyframes bob{50%{transform:translateY(-8px)}}
@media(prefers-reduced-motion:reduce){.fl{animation:none}}
@media(max-width:940px){.hero{padding:40px 0 44px}.scene{max-width:560px;margin:0 auto;width:100%}}
@media(max-width:520px){.dash{transform:none}.side{display:none}.fl-b{width:200px;left:0;bottom:0}.fl-c,.fl-a{display:none}.kpi em{display:none}.scene{padding:24px 0 60px}}
/* tabs */
.tabs{display:inline-flex;background:#F1F5F9;border-radius:14px;padding:5px;gap:4px}
.tabs button{border:0;background:transparent;padding:9px 18px;border-radius:10px;font-weight:600;font-size:15px;color:#64748B;cursor:pointer}
.tabs button.on{background:#fff;color:var(--ink);box-shadow:0 2px 8px -2px rgba(15,23,42,.15)}
/* program cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1000px){.grid3{grid-template-columns:repeat(2,1fr)}.grid4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid3,.grid4{grid-template-columns:1fr}}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);display:flex;flex-direction:column;overflow:hidden;transition:.2s}
.pcard:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#CBD5E1}
.pcard .bd{padding:24px 24px 20px;display:flex;flex-direction:column;gap:12px;flex:1}
.pcard .top{display:flex;justify-content:space-between;align-items:flex-start}
.badge{font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:var(--brand-50);color:var(--brand);border:1px solid var(--brand-100)}
.badge.hot{background:#FFF7ED;color:#C2410C;border-color:#FED7AA}
.pcard h3{font-size:19px;line-height:1.35}
.pcard p{font-size:14px;color:var(--muted)}
.pcard .ft{display:flex;align-items:center;gap:16px;padding:13px 24px;background:var(--bg2);border-top:1px solid #F1F5F9;font-size:13px;color:var(--muted)}
.pcard .ft span{display:inline-flex;align-items:center;gap:5px}
.pcard .ft svg{width:15px;height:15px}
.pcard .ft .go{margin-left:auto;color:var(--brand);font-weight:600;font-size:14px}
/* tool cards */
.tool{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;transition:.2s}
.tool:hover{box-shadow:var(--shadow);border-color:#CBD5E1}
.tool .lt{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;color:#fff;font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;font-weight:800;font-size:19px;flex-shrink:0}
.tool b{display:block;color:var(--ink);font-size:15px}
.tool span{font-size:13px;color:var(--muted)}
.tool em{display:block;font-style:normal;font-size:12px;font-weight:600;color:var(--brand);margin-top:2px}
/* prompt block */
.pbox{background:linear-gradient(135deg,#EAF3FF,#F0F8FF 60%,#ECFEFF);border:1px solid var(--brand-100);border-radius:28px;padding:48px;display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:center}
.pbox h2{font-size:clamp(26px,3vw,34px);line-height:1.2;margin:14px 0 12px}
.pbox p.sub{color:#475569;margin-bottom:24px}
.pcards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:900px){.pbox{grid-template-columns:1fr;padding:28px}.pcards{grid-template-columns:1fr}}
.prompt{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:10px}
.prompt .top{display:flex;justify-content:space-between;align-items:center}
.prompt h4{font-size:15px;line-height:1.4}
.prompt pre{white-space:pre-wrap;font-family:inherit;font-size:13px;line-height:1.6;background:var(--bg2);border:1px solid #F1F5F9;border-radius:10px;padding:10px 12px;color:#475569;max-height:112px;overflow:hidden;position:relative;-webkit-mask-image:linear-gradient(#000 65%,transparent);mask-image:linear-gradient(#000 65%,transparent)}
.copy{display:inline-flex;align-items:center;gap:5px;border:0;background:transparent;color:var(--muted);font-size:13px;cursor:pointer;padding:2px}
.copy:hover{color:var(--brand)}
.copy svg{width:15px;height:15px}
/* about */
.about{display:grid;grid-template-columns:auto 1fr;gap:40px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:28px;padding:44px;box-shadow:var(--shadow)}
.avatar{width:136px;height:136px;border-radius:50%;padding:4px;background:var(--grad)}
.avatar div{width:100%;height:100%;border-radius:50%;background:#fff;display:grid;place-items:center;font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;font-weight:800;font-size:44px}
.about h2{font-size:28px;margin:12px 0 10px}
.about p{color:#475569;margin-bottom:20px;max-width:680px}
@media(max-width:760px){.about{grid-template-columns:1fr;text-align:center;padding:28px}.avatar{margin:0 auto}.about p{margin-left:auto;margin-right:auto}}
/* footer */
footer{border-top:1px solid var(--line);padding:28px 0 20px;background:var(--bg2);font-size:14px;color:var(--muted)}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px}
.fgrid h5{font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;font-size:15px;color:var(--ink);margin-bottom:14px}
.fgrid ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.fgrid a:hover{color:var(--brand)}
.sub-form{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.sub-form input{border:1px solid var(--line);border-radius:12px;padding:11px 14px;font-size:14px;outline:0}
.sub-form input:focus{border-color:var(--brand)}
.ftop{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.flinks{display:flex;gap:6px 26px;flex-wrap:wrap;font-weight:500;color:#475569}
.flinks a:hover{color:var(--brand)}
.fbot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:13px}
@media(max-width:860px){.fgrid{grid-template-columns:1fr 1fr}.fgrid>div:first-child{grid-column:1/-1}}
@media(max-width:520px){.fgrid{grid-template-columns:1fr}}
/* inner pages */
.phero{padding:48px 0 8px}
.crumb{font-size:14px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--brand);font-weight:500}
.phero h1{font-size:clamp(30px,4vw,44px);line-height:1.15;font-weight:800}
.phero .sub{font-size:17px;color:#475569;margin-top:12px;max-width:720px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 8px}
.chips a{display:inline-flex;align-items:center;gap:8px;padding:7px 14px 7px 8px;border-radius:999px;border:1px solid var(--line);font-size:14px;font-weight:500;background:#fff}
.chips a:hover{border-color:var(--brand);color:var(--brand)}
.chips .tile{width:24px;height:24px;border-radius:7px}.chips .tile svg{width:13px;height:13px}
.group{padding-top:44px}
.gh{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.gh h2{font-size:23px}.gh p{font-size:14px;color:var(--muted)}
.lessons{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:1000px){.lessons{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.lessons{grid-template-columns:1fr}}
.lesson{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:8px;transition:.2s}
.lesson:hover{box-shadow:var(--shadow);border-color:#CBD5E1}
.lesson h4{font-size:16px;line-height:1.4}
.lesson p{font-size:14px;color:var(--muted)}
.lesson .tags{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.tag{font-size:11.5px;font-weight:600;padding:2px 9px;border-radius:999px;background:#F1F5F9;color:#475569}
.tag.ok{background:#ECFDF5;color:#047857}.tag.soon{background:#FFF7ED;color:#C2410C}
.lesson .meta{display:flex;gap:14px;font-size:12.5px;color:var(--muted);margin-top:auto;padding-top:10px;border-top:1px solid #F1F5F9}
.lesson .meta span{display:inline-flex;align-items:center;gap:4px}.lesson .meta svg{width:14px;height:14px}
.starter{display:flex;gap:18px;align-items:center;background:linear-gradient(135deg,#EAF3FF,#F0F8FF);border:1px solid var(--brand-100);border-radius:20px;padding:20px 24px;margin-top:28px;flex-wrap:wrap}
.starter>div{flex:1;min-width:220px}
.starter b{color:var(--ink);font-size:17px}
.starter p{font-size:14px;color:#475569}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 22px}
.filters button{padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;cursor:pointer;color:#475569}
.filters button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.news{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.news:hover{box-shadow:var(--shadow)}
.news .th{height:140px;display:grid;place-items:center;color:#fff}
.news .th svg{width:40px;height:40px;opacity:.95}
.news .bd{padding:18px;display:flex;flex-direction:column;gap:8px}
.news h4{font-size:16px;line-height:1.4}.news small{color:var(--muted);font-size:13px}
/* lesson page */
.lp{display:grid;grid-template-columns:1fr 330px;gap:28px;padding:24px 0 72px;align-items:start}
@media(max-width:920px){.lp{grid-template-columns:1fr}}
.content{background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px}
.content h3{display:flex;align-items:center;gap:10px;font-size:20px;margin:30px 0 12px}
.content h3:first-child{margin-top:0}
.content h3 .tile{width:32px;height:32px;border-radius:9px}.content h3 .tile svg{width:16px;height:16px}
.goal{background:var(--brand-50);border-radius:14px;padding:16px 18px;color:var(--brand-d);font-weight:500}
.steps{counter-reset:s;list-style:none;display:flex;flex-direction:column;gap:10px}
.steps li{counter-increment:s;position:relative;padding:14px 16px 14px 56px;background:var(--bg2);border:1px solid #F1F5F9;border-radius:14px}
.steps li::before{content:counter(s);position:absolute;left:14px;top:13px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;display:grid;place-items:center;font-size:13px}
.steps b{color:var(--ink)}
.ex{background:#FFF7ED;border:1px solid #FED7AA;border-radius:14px;padding:16px 18px;color:#7C2D12}
.info{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;position:sticky;top:96px}
.info h4{font-size:15px;margin-bottom:14px}
.info dl{display:grid;grid-template-columns:auto 1fr;gap:10px 14px;font-size:14px}
.info dt{color:var(--muted)}.info dd{font-weight:600;color:var(--ink)}
.soonbox{text-align:center;padding:48px 10px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;opacity:0;transition:.3s;pointer-events:none;z-index:99}
.toast.show{opacity:1}

/* ---- site additions ---- */
.lesson.dim{opacity:.62;background:var(--bg2)}
.lesson.dim:hover{box-shadow:none;border-color:var(--line)}
.lt.big{width:60px;height:60px;border-radius:16px;display:grid;place-items:center;color:#fff;font-family:"Plus Jakarta Sans","Be Vietnam Pro",sans-serif;font-weight:800;font-size:26px}
.appbox{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.app-frame{display:block;width:100%;height:1100px;border:0}
@media(max-width:700px){.app-frame{height:900px}}
.lp{grid-template-columns:1fr 300px}
@media(max-width:920px){.lp{grid-template-columns:1fr}.info{position:static}}
.group{scroll-margin-top:90px}
.soonbox .tile{margin:0 auto}
a{text-underline-offset:3px}
:focus-visible{outline:3px solid #A5B4FC;outline-offset:2px;border-radius:6px}
.lmeta{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;margin:22px 0 18px;font-size:14px;color:#475569}
.lmeta span{display:inline-flex;align-items:center;gap:6px}
.lmeta svg{width:16px;height:16px;color:var(--brand)}
.lmeta .full{margin-left:auto;font-weight:600;color:var(--brand)}
@media(max-width:600px){.lmeta .full{margin-left:0}}

.starter.core{text-decoration:none;color:inherit;transition:transform .15s,box-shadow .2s}
.starter.core:hover{transform:translateY(-2px);box-shadow:0 16px 34px -20px rgba(11,95,255,.45)}
.starter .kick{display:block;font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#0B5FFF;margin-bottom:2px}
.starter .cmeta{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.starter .cmeta span{font-size:12.5px;font-weight:600;color:#334155;background:#fff;border:1px solid #DCEBFF;border-radius:999px;padding:3px 10px}