:root{
  --bg:#0f0f11;--panel:#1a1a1d;--panel2:#232327;--line:#2f2f35;--text:#ececf1;--muted:#9b9ba6;
  --blue:#3d7df2;--blue2:#2b63cf;--violet:#8b5cf6;--violet2:#b06cf5;--green:#2fbf71;--orange:#f0a13a;--red:#ef5461;
  --chip:#26262b;--shadow:0 10px 40px rgba(0,0,0,.45);--r:14px;
  --font:"Segoe UI Variable Text","Segoe UI",Inter,system-ui,-apple-system,Roboto,Arial,sans-serif;
  --mono:"Cascadia Code",Consolas,"SF Mono",Menlo,monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]){
  --bg:#f4f5f8;--panel:#ffffff;--panel2:#f0f1f5;--line:#dcdee6;--text:#16171c;--muted:#636674;
  --chip:#eceef3;--shadow:0 10px 40px rgba(20,25,50,.14);color-scheme:light;
}}
:root[data-theme="light"]{
  --bg:#f4f5f8;--panel:#ffffff;--panel2:#f0f1f5;--line:#dcdee6;--text:#16171c;--muted:#636674;
  --chip:#eceef3;--shadow:0 10px 40px rgba(20,25,50,.14);color-scheme:light;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 var(--font);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
h1{font-size:26px;line-height:1.2;margin:0 0 6px;letter-spacing:-.01em}
h2{font-size:19px;margin:0 0 10px}
h3{font-size:17px;margin:22px 0 8px}
h4{font-size:15px;margin:16px 0 6px}
p{margin:0 0 12px}
kbd{font:11px var(--font);background:var(--panel2);border:1px solid var(--line);border-radius:5px;padding:1px 5px;color:var(--muted)}
code{font:13px var(--mono);background:var(--panel2);border:1px solid var(--line);border-radius:6px;padding:1px 6px}
pre{background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:12px 14px;overflow:auto;font:13px/1.5 var(--mono);margin:0 0 14px}
pre code{background:none;border:0;padding:0}
::selection{background:rgba(61,125,242,.35)}

/* header */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--panel)}
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;height:60px;display:flex;align-items:center;gap:22px;padding-left:max(22px,env(safe-area-inset-left,0px));padding-right:max(22px,env(safe-area-inset-right,0px));background:var(--panel);border-bottom:1px solid var(--line)}
.logo{font-weight:800;letter-spacing:.06em;font-size:18px;white-space:nowrap}
.logo b{color:var(--green)}
.nav{display:flex;align-items:center;gap:4px;flex:1;min-width:0}
.nav>a,.ddbtn{padding:8px 12px;border-radius:9px;color:var(--muted);font-weight:600;background:none;border:0;white-space:nowrap}
.nav>a:hover,.ddbtn:hover,.nav>a.on{color:var(--text);background:var(--panel2)}
.dd{position:relative}
.ddmenu{display:none;position:absolute;top:100%;left:0;min-width:220px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:6px;box-shadow:var(--shadow)}
.dd:hover .ddmenu,.dd:focus-within .ddmenu{display:block}
.ddmenu a{display:block;padding:8px 10px;border-radius:8px}
.ddmenu a:hover{background:var(--panel2)}
.top-r{display:flex;align-items:center;gap:8px}
.search-btn{display:flex;align-items:center;gap:6px;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:7px 10px;color:var(--muted);min-width:190px}
.search-btn span{font-size:17px;line-height:1}
.search-btn kbd:first-of-type{margin-left:auto}
.icon-btn{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;border:1px solid transparent;background:none;color:var(--muted);font-size:18px}
.icon-btn:hover{background:var(--panel2);color:var(--text)}
.badge{background:var(--violet);color:#fff;font-size:11px;border-radius:99px;padding:1px 7px;margin-left:4px}

/* layout */
main{max-width:1180px;margin:0 auto;padding-block:26px 80px;padding-left:max(22px,env(safe-area-inset-left,0px));padding-right:max(22px,env(safe-area-inset-right,0px))}
main.wide{max-width:none;padding-block:14px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.sub{color:var(--muted);margin:0 0 18px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:18px;align-items:start}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.card.hover:hover{border-color:#4a4a55}
.card h2:first-child,.card h3:first-child{margin-top:0}
.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sp{flex:1}
.muted{color:var(--muted)}
.small{font-size:13px}
.mt{margin-top:14px}.mb{margin-bottom:14px}
.crumbs{color:var(--muted);font-size:13px;margin-bottom:10px}
.crumbs a:hover{color:var(--text)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 16px;border-radius:10px;border:1px solid var(--line);background:var(--panel2);font-weight:600;white-space:nowrap}
.btn:hover{border-color:#55556a}
.btn.pri{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.pri:hover{background:var(--blue2)}
.btn.vio{background:linear-gradient(90deg,var(--violet),var(--violet2));border:0;color:#fff}
.btn.ghost{background:none}
.btn.sm{padding:5px 10px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.5;cursor:default}
.btn.block{width:100%}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chipbox{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:12px}
.chipbox h4{margin:0 0 10px;font-size:14px}
.chip{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:99px;background:var(--chip);border:1px solid var(--line);font-weight:600;font-size:14px;color:var(--text)}
button.chip:hover{border-color:#5b5b6b}
.chip.on{border-color:var(--blue);background:rgba(61,125,242,.16)}
.chip i{font-style:normal;background:rgba(127,127,140,.22);border-radius:99px;padding:0 7px;font-size:12px;color:var(--muted)}
.tag{display:inline-block;font-size:12px;font-weight:600;padding:1px 8px;border-radius:7px;background:var(--chip);border:1px solid var(--line);color:var(--muted)}
.tag.p{background:rgba(139,92,246,.16);border-color:rgba(139,92,246,.4);color:var(--violet)}
.tag.b{background:rgba(61,125,242,.14);border-color:rgba(61,125,242,.4);color:var(--blue)}
.tag.g{background:rgba(47,191,113,.13);border-color:rgba(47,191,113,.4);color:var(--green)}
.tag.o{background:rgba(240,161,58,.13);border-color:rgba(240,161,58,.4);color:var(--orange)}

.dots{display:inline-flex;gap:3px;vertical-align:middle}
.dots u{width:8px;height:8px;border-radius:50%;background:rgba(127,127,140,.3);text-decoration:none}
.dots.d1 u:nth-child(-n+1){background:var(--green)}
.dots.d2 u:nth-child(-n+2){background:var(--orange)}
.dots.d3 u:nth-child(-n+3){background:var(--red)}

/* lists */
.list{display:flex;flex-direction:column;gap:8px}
.item{display:flex;align-items:center;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.item:hover{border-color:#55556a;background:var(--panel2)}
.item .ttl{font-weight:700}
.item .meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.st{flex:none;width:18px;height:18px;border-radius:50%;border:2px solid #666674;display:grid;place-items:center;font-size:11px;color:#fff}
.st.ok{background:var(--green);border-color:var(--green)}
.st.bad{border-color:var(--orange)}
.st.part{border-color:var(--blue);background:conic-gradient(var(--blue) var(--p,50%),transparent 0)}
.inp{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px 12px;outline:none;min-width:0}
.inp:focus{border-color:var(--blue)}
select.inp{padding-right:28px}
textarea.inp{width:100%;min-height:120px;resize:vertical;line-height:1.5}

/* progress */
.bar{height:8px;background:var(--panel2);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--green),#6fdc9f);border-radius:99px;transition:width .4s}
.ring{--p:0;width:112px;height:112px;border-radius:50%;background:conic-gradient(var(--green) calc(var(--p)*1%),var(--panel2) 0);display:grid;place-items:center;flex:none}
.ring>div{width:88px;height:88px;border-radius:50%;background:var(--panel);display:grid;place-items:center;font-size:24px;font-weight:800}
.stat{background:var(--panel2);border-radius:12px;padding:12px 14px}
.stat b{display:block;font-size:22px}
.stat span{color:var(--muted);font-size:13px}

/* module cards */
.mod{display:flex;gap:14px;align-items:flex-start}
.mod .num{flex:none;width:44px;height:44px;border-radius:12px;background:var(--panel2);display:grid;place-items:center;font-weight:800;color:var(--muted)}
.mod.done .num{background:rgba(47,191,113,.16);color:var(--green)}
.mod.cur{border-color:var(--blue)}
.mod h3{margin:0 0 2px}
.weeks{display:grid;grid-template-columns:repeat(24,1fr);gap:3px}
.weeks a{height:26px;border-radius:5px;background:var(--panel2);font-size:10px;display:grid;place-items:center;color:var(--muted)}
.weeks a.done{background:rgba(47,191,113,.35);color:var(--text)}
.weeks a.now{outline:2px solid var(--blue);color:var(--text)}

/* lesson content */
.prose{max-width:780px}
.prose ul,.prose ol{margin:0 0 14px;padding-left:22px}
.prose li{margin:3px 0}
.prose table{border-collapse:collapse;width:100%;margin:0 0 16px;font-size:14px}
.prose th,.prose td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
.prose th{background:var(--panel2)}
.tblwrap{overflow-x:auto}
.note{border-left:3px solid var(--blue);background:rgba(61,125,242,.09);border-radius:0 10px 10px 0;padding:10px 14px;margin:0 0 14px}
.note.warn{border-color:var(--orange);background:rgba(240,161,58,.09)}
.note.ex{border-color:var(--violet);background:rgba(139,92,246,.09)}
.note b.lbl{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:2px}
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:0 0 16px}
.flow span{background:var(--panel2);border:1px solid var(--line);border-radius:9px;padding:7px 11px;font-weight:600;font-size:14px}
.flow em{color:var(--muted);font-style:normal}
.terms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.term{background:var(--panel2);border-radius:10px;padding:10px 12px;font-size:14px}
.term b{color:var(--green)}
.toc a{display:flex;gap:8px;align-items:center;padding:7px 8px;border-radius:8px;font-size:14px}
.toc a:hover,.toc a.on{background:var(--panel2)}

/* questions */
.q{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-bottom:12px}
.q .qt{font-weight:700;margin-bottom:10px}
.q .qh{color:var(--muted);font-size:13px;margin:-4px 0 10px}
.opt{display:flex;gap:10px;align-items:flex-start;width:100%;text-align:left;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:7px}
.opt:hover{border-color:#5d5d70}
.opt .mk{flex:none;width:18px;height:18px;margin-top:2px;border:2px solid #70707e;border-radius:50%}
.opt.multi .mk{border-radius:5px}
.opt.sel{border-color:var(--blue);background:rgba(61,125,242,.14)}
.opt.sel .mk{background:var(--blue);border-color:var(--blue)}
.opt.ok{border-color:var(--green)!important;background:rgba(47,191,113,.13)!important}
.opt.bad{border-color:var(--red)!important;background:rgba(239,84,97,.12)!important}
.locked .opt,.locked .ord button,.locked .seg button{pointer-events:none}
.ord{display:flex;align-items:center;gap:8px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:7px 10px;margin-bottom:6px}
.ord .n{width:22px;color:var(--muted);font-weight:700}
.ord .tx{flex:1}
.ord button{width:28px;height:28px;border-radius:7px;border:1px solid var(--line);background:var(--panel)}
.ord.ok{border-color:var(--green)}.ord.bad{border-color:var(--red)}
.mrow{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:8px;align-items:center;margin-bottom:7px}
.mrow>div{background:var(--panel2);border-radius:9px;padding:8px 10px;font-weight:600}
.mrow select{width:100%}
.mrow.ok select{border-color:var(--green)}.mrow.bad select{border-color:var(--red)}
.brow{display:flex;gap:10px;align-items:center;justify-content:space-between;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:8px 10px;margin-bottom:6px}
.brow.ok{border-color:var(--green)}.brow.bad{border-color:var(--red)}
.seg{display:flex;gap:4px;flex:none;flex-wrap:wrap;justify-content:flex-end}
.seg button{padding:4px 10px;border-radius:8px;border:1px solid var(--line);background:var(--panel);font-size:13px;font-weight:600}
.seg button.sel{background:var(--blue);border-color:var(--blue);color:#fff}
.fb{margin-top:10px;border-radius:10px;padding:10px 12px;font-size:14px}
.fb.ok{background:rgba(47,191,113,.12);border:1px solid rgba(47,191,113,.4)}
.fb.bad{background:rgba(239,84,97,.1);border:1px solid rgba(239,84,97,.4)}
.fb b.v{display:block;margin-bottom:3px}
.fb.ok b.v{color:var(--green)}.fb.bad b.v{color:var(--red)}
.fb p:last-child{margin:0}

/* trainer task page */
.ide{display:grid;grid-template-columns:minmax(260px,330px) minmax(0,1fr) minmax(260px,400px);gap:10px;height:calc(100vh - 88px);min-height:520px}
.pane{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);display:flex;flex-direction:column;min-height:0}
.pane-h{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line);font-weight:700;font-size:14px}
.pane-b{padding:14px;overflow:auto;flex:1}
.pane-f{padding:10px 12px;border-top:1px solid var(--line);display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.pane .q{border:0;padding:0;background:none}
.empty{height:100%;display:grid;place-items:center;text-align:center;color:var(--muted)}
.empty b{display:block;font-size:30px;margin-bottom:6px}
.label{font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:700}

/* flashcards */
.flash{max-width:560px;margin:10px auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:34px 26px;text-align:center;min-height:240px;display:flex;flex-direction:column;justify-content:center;gap:10px}
.flash .en{font-size:28px;font-weight:800}
.flash .ru{font-size:18px;color:var(--green);font-weight:700}

/* auth */
.gate{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:24px;align-items:start;max-width:980px;margin:20px auto}
.authbox{max-width:420px}
.authbox form{display:flex;flex-direction:column;gap:8px}
.authbox .inp{width:100%}
.authbox .check{border:0}
@media (max-width:860px){.gate{grid-template-columns:1fr}}

.authbox h2{font-size:22px;margin-bottom:14px}
.authbox form{gap:12px}
.authbox .inp{padding:11px 14px}
.lnk{background:none;border:0;padding:0;color:var(--blue);font-weight:600;text-align:left}
.lnk:hover{text-decoration:underline}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px;margin:16px 0 12px}
.or:before,.or:after{content:"";flex:1;height:1px;background:var(--line)}
.socials{display:flex;gap:12px}
.soc{width:42px;height:42px;border-radius:50%;border:0;display:grid;place-items:center;padding:0}
.soc:hover{filter:brightness(1.12)}
.soc-yandex{background:#fc3f1d}.soc-telegram{background:#2aabee}.soc-google{background:#fff;border:1px solid var(--line)}.soc-github{background:#1b1f23}
.umenu .ddmenu{left:auto;right:0;min-width:190px}
.ddmenu[hidden]{display:none!important}
.ddmenu button{display:block;width:100%;text-align:left;padding:8px 10px;border-radius:8px;background:none;border:0}
.ddmenu button:hover{background:var(--panel2)}
#authBtn{gap:8px;max-width:200px}
.uname{overflow:hidden;text-overflow:ellipsis}
.ava{width:24px;height:24px;border-radius:50%;background:var(--violet);color:#fff;display:inline-grid;place-items:center;font-weight:700;font-size:13px;flex:none;object-fit:cover}
.ava.big{width:64px;height:64px;font-size:28px}
.cert{border:2px solid var(--green);border-radius:var(--r);padding:22px;background:linear-gradient(135deg,rgba(47,191,113,.12),transparent 60%),var(--panel)}
.cert .cname{font-size:26px;font-weight:800;margin:10px 0 2px}
.cert p{margin:0;color:var(--muted)}

/* landing (главная для посетителей) */
main.land{max-width:1120px}
.c{text-align:center}
.grad{background:linear-gradient(90deg,#5aa2ff,#9b7bff 55%,#2fd3a0);-webkit-background-clip:text;background-clip:text;color:transparent}
.l-hero{text-align:center;padding-block:40px 20px}
.l-title{font-size:clamp(32px,5.4vw,60px);line-height:1.08;letter-spacing:-.02em;margin:0 0 18px;text-wrap:balance}
.l-lead{font-size:clamp(15px,1.8vw,19px);color:var(--muted);max-width:620px;margin:0 auto 22px;text-wrap:balance}
.l-facts{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:34px}
.l-facts span{background:var(--panel);border:1px solid var(--line);border-radius:99px;padding:6px 14px;color:var(--muted);font-size:14px}
.l-facts b{color:var(--text);font-variant-numeric:tabular-nums}
.l-cards{display:grid;grid-template-columns:1.2fr 1.2fr .8fr;gap:14px;text-align:left}
.l-card{display:flex;gap:12px;align-items:flex-start;justify-content:space-between;border-radius:18px;padding:20px;color:#fff;min-height:110px;transition:transform .15s}
.l-card:hover{transform:translateY(-3px)}
.l-card b{display:block;font-size:18px;margin-bottom:6px}
.l-card span{font-size:14px;opacity:.88}
.l-card i{font-style:normal;flex:none;width:32px;height:32px;border-radius:50%;background:rgba(255,255,255,.18);display:grid;place-items:center}
.l-card.c1{background:linear-gradient(135deg,#7b3fe4,#b04ad6)}
.l-card.c2{background:linear-gradient(135deg,#1d8f78,#2b6fb6)}
.l-card.c3{background:linear-gradient(135deg,#2a8fd8,#2563c9)}
.l-sec{padding-block:44px}
.l-h2{font-size:clamp(24px,3.4vw,38px);line-height:1.15;letter-spacing:-.01em;margin:0 0 24px;text-wrap:balance}
.l-who{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
.l-whocard{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px}
.l-whocard b{font-size:17px}
.l-whocard p{color:var(--muted);font-size:14px;margin:8px 0 0}
.l-split{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;align-items:center}
.l-big p{font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.25;margin:0 0 28px}
.l-phone{height:420px;border:2px solid var(--line);border-radius:28px;background:var(--panel);overflow:hidden;position:relative;-webkit-mask-image:linear-gradient(transparent,#000 15%,#000 85%,transparent);mask-image:linear-gradient(transparent,#000 15%,#000 85%,transparent)}
.l-scroll{padding:16px 22px;animation:lscroll 90s linear infinite}
.l-phone:hover .l-scroll{animation-play-state:paused}
.l-scroll div{padding:9px 0 9px 18px;border-left:2px solid var(--line);position:relative;font-size:14px}
.l-scroll div:before{content:"";position:absolute;left:-6px;top:14px;width:10px;height:10px;border-radius:50%;background:var(--panel2);border:2px solid var(--line)}
.l-scroll .th{font-weight:700;color:var(--blue);padding-top:16px}
.l-scroll .th:before{background:var(--blue);border-color:var(--blue)}
.l-scroll .tl{color:var(--muted)}
@keyframes lscroll{from{transform:translateY(0)}to{transform:translateY(-50%)}}
@media (prefers-reduced-motion:reduce){.l-scroll{animation:none}.l-phone{overflow:auto}}
.l-demo{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px;max-width:820px}
.l-demohead{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
.l-band{background:linear-gradient(160deg,#1d8f78 0%,#256b9a 55%,var(--bg) 100%);border-radius:24px;margin-block:20px}
.l-bandin{padding:44px max(22px,4vw);color:#fff}
.l-bandin .l-h2{color:#fff;max-width:640px}
.l-cta{background:#fff;color:#14161c;border:0;margin-bottom:30px}
.l-cta:hover{background:#e9edf5}
.l-feats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.l-feats b{display:block;font-size:17px}
.l-feats span{font-size:14px;opacity:.85}
.l-proj{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.l-projcard{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px}
.l-projcard b{display:block;font-size:17px;margin:10px 0 6px}
.l-projcard p{color:var(--muted);font-size:14px;margin:0}
.l-cert{max-width:560px;margin:10px auto 0;text-align:left}
.l-faq{max-width:820px;margin:0 auto}
.l-q{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:4px 18px;margin-bottom:10px}
.l-q summary{cursor:pointer;font-weight:700;padding:12px 0;list-style:none}
.l-q summary::-webkit-details-marker{display:none}
.l-q summary:after{content:"+";float:right;color:var(--muted);font-size:20px;line-height:1}
.l-q[open] summary:after{content:"−"}
.l-q p{color:var(--muted);margin:0 0 14px}
@media (max-width:1050px){.l-who{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:600px){.l-who,.l-proj{grid-template-columns:1fr}}
@media (max-width:860px){.l-cards,.l-feats{grid-template-columns:1fr}.l-split{grid-template-columns:1fr}.l-phone{height:320px}}

.chip.acc{cursor:pointer;font-weight:600}
.chip.acc input{accent-color:var(--green);margin:0}

.langsw{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;flex:none}
.langsw button{background:none;border:0;padding:6px 9px;font-size:12px;font-weight:700;color:var(--muted)}
.langsw button.on{background:var(--blue);color:#fff}
.langsw button:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}

/* misc */
.check{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-bottom:1px solid var(--line)}
.check:last-child{border:0}
.check input{margin-top:4px;width:16px;height:16px;accent-color:var(--green)}
.crit{display:flex;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}
.crit:last-child{border:0}
.crit .mk{flex:none;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;font-size:12px;color:#fff;background:#666674}
.crit.ok .mk{background:var(--green)}.crit.bad .mk{background:var(--red)}
.crit small{display:block;color:var(--muted)}
.steps{counter-reset:s}
.step{display:flex;gap:12px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line)}
.step:last-child{border:0}
.step:before{counter-increment:s;content:counter(s);flex:none;width:26px;height:26px;border-radius:50%;background:var(--panel2);display:grid;place-items:center;font-weight:700;font-size:13px}
.step .t{flex:1}
.step .t small{display:block;color:var(--muted)}
.matrix{display:grid;grid-template-columns:auto repeat(5,1fr);gap:3px;font-size:12px;text-align:center}
.matrix div{padding:8px 2px;border-radius:5px}
.matrix .c{color:#111;font-weight:700}
.matrix .c.on{outline:3px solid var(--text)}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:100;display:flex;justify-content:center;align-items:flex-start;padding-top:12vh}
.modal[hidden],.toast[hidden]{display:none}
.modal-box{width:min(620px,92vw);background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.modal-box input{width:100%;padding:16px 18px;background:none;border:0;border-bottom:1px solid var(--line);outline:none;font-size:16px}
.search-res{max-height:52vh;overflow:auto;padding:6px}
.search-res a{display:flex;gap:10px;align-items:center;padding:9px 12px;border-radius:9px}
.search-res a:hover,.search-res a.on{background:var(--panel2)}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:99px;font-weight:600;z-index:120;box-shadow:var(--shadow)}
.score{font-size:44px;font-weight:800;line-height:1}
.score.ok{color:var(--green)}.score.bad{color:var(--orange)}
.timer{font:700 15px var(--mono);min-width:54px;text-align:right}

@media (max-width:980px){
  .split,.g2,.g3,.terms{grid-template-columns:1fr}
  .ide{grid-template-columns:1fr;height:auto}
  .pane-b{max-height:none}
  .search-btn{min-width:0}.search-btn kbd{display:none}
  .weeks{grid-template-columns:repeat(12,1fr)}
}
@media (max-width:720px){
  .top{height:auto;flex-wrap:wrap;padding-block:10px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));gap:8px}
  .nav{order:3;flex-basis:100%;overflow-x:auto}
  .top-r{margin-left:auto}
  main{padding-block:18px 70px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
  .mrow{grid-template-columns:1fr}
  .brow{flex-direction:column;align-items:stretch}
  .seg{justify-content:flex-start}
}