@font-face{font-family:SG;src:url(/a/sg-400.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:SG;src:url(/a/sg-600.woff2) format('woff2');font-weight:500 700;font-display:swap}
@font-face{font-family:SG;src:url(/a/sg-800.woff2) format('woff2');font-weight:800 900;font-display:swap}
:root{--ink:#14142B;--ink2:#4A4A68;--mute:#6E6E88;--line:#E6E7F0;--soft:#F4F5FA;--blue:#2B59FF;--blue-d:#1A3FD6;--tint:#EEF2FF;--pink:#FF4FA3;--pink-t:#FFF0F7;--ok:#0E8A5F;--warn:#A85C08;--no:#C2264B}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;scroll-padding-top:16px}
body{font-family:SG,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;color:var(--ink);background:#fff;font-size:16px;line-height:1.55;overflow-x:hidden}
.u{font-family:SG,'Segoe UI Symbol','Apple Symbols','Noto Sans Math','Noto Sans Symbols 2','Cambria Math','DejaVu Sans',sans-serif;font-variant-ligatures:none}
a{color:inherit;text-decoration:none}
p a,.faq a,td a,li a{color:var(--blue-d);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:6px}
[hidden]{display:none!important}
.w{max-width:1160px;margin:0 auto;padding:0 32px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;z-index:20}
.skip:focus{top:12px}
/* header */
.nav{border-bottom:1px solid var(--line);background:#fff;position:relative;z-index:10}
.nav .w{display:flex;align-items:center;height:68px;gap:28px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:-.02em;flex:none}
.brand svg{width:32px;height:32px;flex:none}
.links{display:flex;gap:22px;font-size:15px;font-weight:500;color:var(--ink2)}
.links a{padding:6px 0;border-bottom:2px solid transparent;white-space:nowrap}
.links a:hover,.links a.on{color:var(--ink);border-bottom-color:var(--blue)}
.nav .sp{flex:1}
.find{position:relative;width:230px}
.find input{width:100%;height:40px;border:1px solid var(--line);border-radius:10px;padding:0 12px 0 34px;font:inherit;font-size:14.5px;color:var(--ink);background:#fff}
.find input:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px var(--tint)}
.find svg{position:absolute;left:11px;top:12px;width:16px;height:16px;color:var(--mute)}
.find .res{position:absolute;top:46px;left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px;box-shadow:0 12px 32px rgba(20,20,43,.12);z-index:30}
.find .res a,.find .res span{display:block;padding:9px 10px;border-radius:8px;font-size:14.5px}
.find .res a:hover,.find .res a:focus{background:var(--soft)}
.find .res span{color:var(--mute)}
#menu{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);place-items:center}
#menu i{display:block;width:18px;height:2px;background:var(--ink);box-shadow:0 -6px 0 var(--ink),0 6px 0 var(--ink)}
/* hero */
.hero{padding:40px 0 0}
.crumb{font-size:14px;color:var(--mute);margin-bottom:12px;display:flex;flex-wrap:wrap;gap:6px}
.crumb a{color:var(--ink2)}
.crumb a:hover{color:var(--blue-d)}
.crumb span[aria-hidden]{color:#B9BACC}
h1{font-weight:800;font-size:44px;letter-spacing:-.035em;line-height:1.06}
.lede{font-size:18px;color:var(--ink2);margin-top:12px;max-width:62ch}
.by{font-size:13.5px;color:var(--mute);margin-top:10px}
.field{margin-top:28px;border:2px solid var(--ink);border-radius:18px;padding:20px 22px 14px;position:relative;background:#fff}
.field:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px var(--tint)}
.field label{position:absolute;top:-11px;left:16px;background:#fff;padding:0 8px;font-size:13px;font-weight:600;color:var(--ink2)}
.field textarea{display:block;width:100%;border:0;resize:none;font:inherit;font-size:44px;font-weight:700;letter-spacing:-.03em;line-height:1.15;color:var(--ink);height:60px;background:transparent;overflow:hidden}
.field textarea:focus{outline:0}
.field textarea::placeholder{color:#C3C4D6}
.field .meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:14px;color:var(--mute);gap:10px}
.field .acts{display:flex;gap:8px}
.btn{font-size:14px;font-weight:600;border-radius:10px;padding:9px 14px;border:1px solid var(--line);background:#fff;color:var(--ink);white-space:nowrap;display:inline-flex;align-items:center;gap:6px;min-height:38px}
.btn:hover{border-color:#C9CAD9}
.btn.pri{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.pri:hover{background:var(--blue-d)}
.btn.done{background:var(--ink);border-color:var(--ink);color:#fff}
/* specimen strip */
.spec{margin-top:24px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.spec>div{padding:20px 16px 16px;border-left:1px solid var(--line);min-width:0}
.spec>div:first-child{border-left:0;padding-left:0}
.spec .g{font-size:30px;line-height:1.2;white-space:nowrap;overflow:hidden}
.spec .n{font-size:13.5px;color:var(--mute);margin-top:4px}
/* filters */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 4px}
.chip{font-size:14.5px;font-weight:500;padding:8px 14px;border-radius:999px;background:var(--soft);color:var(--ink2);white-space:nowrap}
.chip:hover{background:#E9EAF3}
.chip.on{background:var(--ink);color:#fff}
.chip b{font-weight:500;color:var(--mute);margin-left:4px}
.chip.on b{color:#A9A9C8}
/* rows */
.grp{margin-top:30px}
.grp>h2,.grp>.h{font-size:15px;font-weight:700;letter-spacing:0;color:var(--ink);display:flex;justify-content:space-between;align-items:baseline;padding-bottom:10px;border-bottom:2px solid var(--ink);line-height:1.3}
.grp small{font-weight:500;color:var(--mute);font-size:13.5px}
.r{display:grid;grid-template-columns:minmax(0,1fr) 230px auto;gap:20px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}
.r .o{font-size:28px;line-height:1.3;overflow-wrap:anywhere;min-width:0;padding:4px 0}
.r .nm{font-size:15px;font-weight:600}
.r .nm small{display:block;font-weight:400;font-size:13px;color:var(--mute);margin-top:1px}
.r .act{display:flex;justify-content:flex-end;gap:8px;align-items:center}
.fav{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:#B8B9CC;font-size:16px}
.fav:hover{color:var(--pink)}
.fav.on{color:var(--pink);border-color:#FFD1E6;background:var(--pink-t)}
.dots{display:flex;gap:5px;margin-top:6px;flex-wrap:wrap}
.dots i{font-style:normal;font-size:11.5px;font-weight:600;border-radius:6px;padding:2px 6px}
.dots .y{background:#E3F6EE;color:var(--ok)}.dots .p{background:#FFF1DE;color:var(--warn)}.dots .n{background:#FDE7EC;color:var(--no)}
.empty{padding:24px 0;color:var(--mute)}
.slider{display:flex;align-items:center;gap:12px;margin-top:16px;font-size:14.5px;font-weight:600}
.slider input{width:220px;accent-color:var(--blue)}
/* layout */
.cols{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:52px;padding-bottom:72px}
.cols>div{min-width:0}
.side .blk{border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin-top:30px}
.side .t{font-weight:700;font-size:15px;margin-bottom:4px}
.side .lnk a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:15px}
.side .lnk a:last-child{border-bottom:0}
.side .lnk a:hover{color:var(--blue-d)}
.side .lnk a::after{content:attr(data-g);font-family:SG,'Segoe UI Symbol','Apple Symbols','Noto Sans Math','Noto Sans Symbols 2','Cambria Math','DejaVu Sans',sans-serif;font-size:17px;color:var(--ink2);white-space:nowrap;overflow:hidden;max-width:55%;flex:none}
.side .stick{position:sticky;top:20px}
.ad{margin:28px 0;text-align:center;min-height:0}
.ad:empty{display:none}
/* content */
.sec{margin-top:60px}
h2{font-size:28px;font-weight:800;letter-spacing:-.025em;line-height:1.18}
h3{font-size:19px;font-weight:700;letter-spacing:-.01em;margin-top:22px}
.sec p,.prose p{font-size:16.5px;color:var(--ink2);margin-top:12px;max-width:66ch}
.sec ul,.prose ul,.sec ol,.prose ol{margin:12px 0 0 20px;color:var(--ink2);max-width:64ch}
.sec li,.prose li{margin-top:6px}
.prev{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:22px}
.pc{border:1px solid var(--line);border-radius:18px;padding:16px;min-width:0}
.pc .h{font-size:13.5px;font-weight:600;color:var(--mute);margin-bottom:12px}
.prof{display:flex;gap:12px;align-items:center;min-width:0}
.prof>div{min-width:0}
.avt{width:52px;height:52px;border-radius:50%;background:conic-gradient(from 200deg,#FF4FA3,#2B59FF,#7AD7FF,#FF4FA3);padding:3px;flex:none}
.avt:after{content:'';display:block;width:100%;height:100%;border-radius:50%;background:#C9D2FF;border:3px solid #fff}
.prof .n{font-size:14.5px;font-weight:700}
.prof .b{font-size:17px;margin-top:2px;overflow-wrap:anywhere}
.prof .s{font-size:13px;color:var(--mute)}
.chat{background:#313338;border-radius:14px;padding:14px;color:#DBDEE1;display:flex;gap:12px;min-width:0}
.chat .avt{width:38px;height:38px;background:#5865F2;padding:0}.chat .avt:after{display:none}
.chat .n{font-size:16px;color:#fff;font-weight:600;overflow-wrap:anywhere}
.chat .n small{font-size:12px;color:#949BA4;font-weight:400;margin-left:6px;font-family:SG,sans-serif}
.chat .m{font-size:14px;margin-top:2px}
.vid{border-radius:14px;background:#0F0F14;color:#fff;height:132px;padding:14px;display:flex;flex-direction:column;justify-content:flex-end;min-width:0}
.vid .n{font-size:19px;overflow-wrap:anywhere}.vid small{color:#B3B3C2;font-size:12.5px;margin-top:2px}
.post{border-radius:14px;background:#fff;border:1px solid var(--line);padding:14px}
.post .n{font-size:14px;font-weight:700}.post .n small{font-weight:400;color:var(--mute);margin-left:4px}
.post .m{font-size:16px;margin-top:6px;overflow-wrap:anywhere}
.tbl{overflow-x:auto;margin-top:18px}
table{width:100%;border-collapse:collapse;font-size:15px}
th{text-align:left;font-size:13.5px;font-weight:600;color:var(--mute);padding:0 12px 10px 0;border-bottom:2px solid var(--ink);white-space:nowrap}
td{padding:13px 12px 13px 0;border-bottom:1px solid var(--line);vertical-align:top}
td code,.mono{font-family:ui-monospace,'SF Mono',Menlo,Consolas,monospace;font-size:14px;background:var(--soft);padding:2px 6px;border-radius:6px;white-space:nowrap}
.st{font-weight:600;font-size:14px;white-space:nowrap}
.st.y{color:var(--ok)}.st.p{color:var(--warn)}.st.n{color:var(--no)}
.st.y:before{content:'● '}.st.p:before{content:'◐ '}.st.n:before{content:'○ '}
.grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-top:20px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.grid>a,.grid>button{padding:14px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:left;min-width:0}
.grid>a:hover,.grid>button:hover{background:var(--soft)}
.grid .g{font-size:23px;line-height:1.25;overflow-wrap:anywhere}
.grid small{display:block;font-size:13px;color:var(--mute);margin-top:3px}
.alpha{grid-template-columns:repeat(13,minmax(0,1fr))}
.alpha>a{text-align:center;padding:10px 0 8px}
.alpha .g{font-size:26px}
.howto{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:22px}
.howto div{border-top:2px solid var(--ink);padding-top:14px;font-size:15px;color:var(--ink2)}
.howto b{display:block;color:var(--ink);font-size:16.5px;margin-bottom:4px}
.howto b span{color:var(--blue);margin-right:8px}
.faq{margin-top:16px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{list-style:none;font-weight:600;font-size:16.5px;display:flex;justify-content:space-between;gap:16px;cursor:pointer}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:'+';color:var(--blue);font-size:22px;line-height:1;flex:none}
.faq details[open] summary:after{content:'\2212'}
.faq p{color:var(--ink2);margin-top:8px;max-width:66ch}
.rel{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:20px}
.rel a{border:1px solid var(--line);border-radius:14px;padding:16px;min-width:0}
.rel a:hover{border-color:var(--blue)}
.rel .g{font-size:21px;white-space:nowrap;overflow:hidden}
.rel small{display:block;font-size:14px;color:var(--ink2);margin-top:4px;font-weight:500}
.gc::before{content:attr(data-g);display:block;font-family:SG,'Segoe UI Symbol','Apple Symbols','Noto Sans Math','Noto Sans Symbols 2','Cambria Math','DejaVu Sans',sans-serif;font-size:23px;line-height:1.25;color:var(--ink);overflow:hidden;white-space:nowrap;text-overflow:clip}
.rel .gc::before{font-size:21px}
.alpha .gc::before{font-size:26px}
.alpha .gc small{font-size:11.5px}
/* tiles */
.az{display:grid;grid-template-columns:repeat(26,minmax(0,1fr));gap:4px;margin-top:22px}
.az a{height:38px;border-radius:10px;display:grid;place-items:center;font-weight:600;font-size:15px;color:var(--ink2);border:1px solid var(--line)}
.az a:hover{border-color:var(--blue);color:var(--blue-d)}
.az a.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.tiles{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));margin-top:16px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.tiles button{padding:20px 8px 12px;text-align:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-width:0}
.tiles button:hover{background:var(--tint)}
.tiles .g{font-size:50px;line-height:1.15;min-height:58px;display:block;overflow:hidden}
.tiles small{display:block;font-size:12.5px;color:var(--mute);margin-top:6px}
.tiles small.done,.grid small.done{color:var(--blue-d);font-weight:600}
.tiles.sm{grid-template-columns:repeat(8,minmax(0,1fr))}
.tiles.sm .g{font-size:36px;min-height:44px}
/* symbol hero */
.big{display:flex;gap:24px;align-items:center;margin-top:26px;flex-wrap:wrap}
.big button{width:150px;height:150px;border-radius:24px;border:2px solid var(--ink);font-size:84px;line-height:1;display:grid;place-items:center;flex:none}
.big button:hover{border-color:var(--blue);background:var(--tint)}
.big .k{font-size:15px;color:var(--ink2)}
.big .k b{display:block;font-size:20px;color:var(--ink);margin-bottom:4px}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:20px;border-top:1px solid var(--line)}
.facts div{padding:14px 14px 14px 0;border-bottom:1px solid var(--line)}
.facts dt{font-size:13px;color:var(--mute)}
.facts dd{font-size:16px;font-weight:600;margin-top:2px;overflow-wrap:anywhere}
/* tool add-ons */
.tool2{margin-top:22px;border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.tool2 .row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:10px}
.tool2 input,.tool2 select{height:40px;border:1px solid var(--line);border-radius:10px;padding:0 10px;font:inherit;font-size:15px;background:#fff;color:var(--ink);min-width:0}
.tool2 .out{margin-top:12px;font-size:24px;overflow-wrap:anywhere;min-height:36px}
pre.blockout{margin-top:12px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:10px;line-height:1.05;overflow-x:auto;color:var(--ink);background:var(--soft);border-radius:12px;padding:14px;white-space:pre}
.nkgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}
.nkgrid .nk{border:1px solid var(--line);border-radius:12px;padding:14px;text-align:left;min-width:0}
.nkgrid .nk:hover{border-color:var(--blue)}
.nkgrid .nk span{display:block;font-size:19px;overflow-wrap:anywhere}
.nkgrid .nk small{font-size:12.5px;color:var(--mute)}
.symbar{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.symbar button{min-width:44px;height:44px;padding:0 10px;border:1px solid var(--line);border-radius:10px;font-size:20px}
.symbar button:hover{border-color:var(--blue);background:var(--tint)}
.symbar button small{display:none}
.symbar button.wide{font-size:13px;font-weight:600}
/* contact / prose */
.prose{max-width:720px;padding:8px 0 72px}
.prose h2{margin-top:40px}
form.cf{display:grid;gap:14px;max-width:560px;margin-top:22px}
form.cf label{font-size:14px;font-weight:600}
form.cf input,form.cf textarea{display:block;width:100%;margin-top:6px;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font:inherit;font-size:15.5px}
form.cf textarea{min-height:140px;resize:vertical}
form.cf .hp{position:absolute;left:-9999px}
/* footer */
footer{border-top:1px solid var(--line);padding:44px 0 28px;font-size:14.5px;color:var(--ink2);background:#fff}
.fcols{display:grid;grid-template-columns:1.3fr repeat(4,minmax(0,1fr));gap:28px}
.fcols .t{font-weight:700;color:var(--ink);margin-bottom:8px;font-size:14.5px}
.fcols a{display:block;padding:4px 0}
.fcols a:hover{color:var(--blue-d)}
.fcols p{color:var(--mute);margin-top:10px;max-width:30ch;font-size:14px}
.fbot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:32px;padding-top:20px;border-top:1px solid var(--line);font-size:13.5px;color:var(--mute)}
.fbot nav{display:flex;gap:18px;flex-wrap:wrap}
/* responsive */
@media (max-width:1080px){
 .links{display:none}
 #menu{display:grid}
 .nav-open .links{display:flex;flex-direction:column;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 32px 16px;gap:0}
 .nav-open .links a{padding:12px 0;border-bottom:1px solid var(--line)}
 .cols{grid-template-columns:1fr;gap:0}
 .side{display:grid;grid-template-columns:1fr 1fr;gap:16px}
 .side .stick{position:static}
 .fcols{grid-template-columns:repeat(3,minmax(0,1fr))}
 .fcols>div:first-child{grid-column:1/-1}
}
@media (max-width:720px){
 .w{padding:0 18px}
 .nav .w{gap:12px}
 .find{width:auto;flex:1}
 .brand span{display:none}
 .nav-open .links{padding:8px 18px 16px}
 .hero{padding-top:26px}
 h1{font-size:32px}
 h2{font-size:23px}
 .lede{font-size:16px}
 .field{padding:16px 14px 12px}
 .field textarea{font-size:30px;height:42px}
 .field .meta{justify-content:flex-end}
 .field .meta .cnt{display:none}
 .spec{display:none}
 .filters{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-right:-18px;padding-right:18px}
 .filters::-webkit-scrollbar{display:none}
 .r{grid-template-columns:minmax(0,1fr) auto;gap:8px 10px;padding:14px 0}
 .r .meta{grid-column:1;grid-row:1}
 .r .act{grid-column:2;grid-row:1}
 .r .o{grid-column:1/3;grid-row:2;font-size:24px}
 .r .dots{display:none}
 .prev,.howto{grid-template-columns:1fr}
 .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .alpha{grid-template-columns:repeat(7,minmax(0,1fr))}
 .rel{grid-template-columns:repeat(2,minmax(0,1fr))}
 .az{grid-template-columns:repeat(9,minmax(0,1fr))}
 .tiles{grid-template-columns:repeat(3,minmax(0,1fr))}
 .tiles.sm{grid-template-columns:repeat(4,minmax(0,1fr))}
 .tiles .g{font-size:40px}
 .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
 .big button{width:110px;height:110px;font-size:60px}
 .side{grid-template-columns:1fr}
 .nkgrid{grid-template-columns:1fr}
 .fcols{grid-template-columns:repeat(2,minmax(0,1fr))}
 .slider input{width:150px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
/* social + videos */
.social{display:flex;gap:10px;margin-top:16px}
.social a{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:var(--ink2)}
.social a:hover{border-color:var(--blue);color:var(--blue-d)}
.social svg{width:18px;height:18px;fill:currentColor}
.videos .yl{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;margin-top:18px}
.videos .ysg{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,200px));gap:14px;margin-top:18px}
.yv{margin:0;min-width:0}
.yv .ytp{position:relative;display:block;width:100%;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#0F0F14;padding:0}
.yv.ys .ytp{aspect-ratio:9/16}
.yv .ytp img,.yv .ytp iframe{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border:0}
.yv .pb{position:absolute;left:50%;top:50%;width:64px;height:44px;margin:-22px 0 0 -32px;border-radius:12px;background:rgba(20,20,43,.82)}
.yv .pb:after{content:'';position:absolute;left:26px;top:13px;border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent #fff}
.yv .ytp:hover .pb,.yv .ytp:focus-visible .pb{background:var(--pink)}
.yv figcaption{font-size:14.5px;font-weight:600;margin-top:8px;line-height:1.35;overflow-wrap:anywhere}
@media (max-width:720px){.videos .ysg{grid-template-columns:repeat(2,minmax(0,1fr))}.videos .yl{grid-template-columns:1fr}}