*{box-sizing:border-box}
:root{--ink:#1f2340;--mut:#5c6080;--bg:#f7f5ff;--card:#fff;--pri:#7048e8;--opp:#f76707;--oppl:#fff4e6;--syn:#0ca678;--synl:#e6fcf5;--cat:#7048e8;--catl:#f3f0ff;--r:16px}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Heebo","Rubik","Assistant",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5;font-size:17px;overflow-x:hidden}
a{color:#5f3dc4}
.wrap{max-width:1040px;margin:0 auto;padding:0 14px}
.skip{position:absolute;right:-999px;top:0;background:#fff;padding:8px;z-index:9}.skip:focus{right:8px}
:focus-visible{outline:3px solid #fab005;outline-offset:2px}
header.top{background:linear-gradient(135deg,#7048e8,#f06595);color:#fff;padding:10px 0;box-shadow:0 2px 10px rgba(80,40,160,.25)}
.hrow{display:flex;align-items:center;gap:10px}
.home{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;flex:1;min-width:0}
.hico{font-size:34px;line-height:1}
.htxt{display:flex;flex-direction:column;min-width:0}
.h1{font-size:22px;font-weight:800;line-height:1.2}
.hsub{font-size:13px;opacity:.92}
.snd{background:rgba(255,255,255,.2);border:0;border-radius:50%;width:44px;height:44px;font-size:22px;cursor:pointer;flex:0 0 44px}
main{padding:16px 14px 30px;outline:none}
.intro p{margin:4px 0 10px;font-size:17px}
.lbl{font-size:16px;margin:16px 0 8px;color:var(--mut);font-weight:700}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.segb{border:2px solid #ddd6fe;background:#fff;border-radius:14px;padding:10px 6px;font:inherit;font-weight:700;cursor:pointer;color:var(--ink);min-height:56px}
.segb .big{display:block;font-size:26px;line-height:1.2}
.segb.on{border-color:var(--pri);background:var(--catl);box-shadow:0 0 0 2px var(--pri) inset}
.segb.s-opp.on{border-color:var(--opp);background:var(--oppl);box-shadow:0 0 0 2px var(--opp) inset}
.segb.s-syn.on{border-color:var(--syn);background:var(--synl);box-shadow:0 0 0 2px var(--syn) inset}
.easy{display:flex;align-items:center;gap:8px;margin-top:12px;background:#fff;border-radius:12px;padding:10px 12px;border:1px dashed #b197fc;cursor:pointer;flex-wrap:wrap}
.easy input,.ez input{width:22px;height:22px;accent-color:var(--pri)}
.easy small{color:var(--mut)}
.games{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(min-width:760px){.games{grid-template-columns:repeat(3,1fr)}}
.gcard{display:flex;flex-direction:column;align-items:center;text-align:center;background:#fff;border-radius:var(--r);padding:16px 10px;text-decoration:none;color:var(--ink);box-shadow:0 3px 12px rgba(60,40,120,.1);border-top:6px solid var(--pri);transition:transform .15s}
.gcard:hover{transform:translateY(-3px)}
.gcard.s-opp{border-top-color:var(--opp)}.gcard.s-syn{border-top-color:var(--syn)}
.gcard.dim{opacity:.6}
.ge{font-size:40px;line-height:1.2}.gn{font-size:20px;font-weight:800}.gd{font-size:14px;color:var(--mut)}
.tlink{display:block;margin-top:18px;background:#fff;border-radius:14px;padding:14px;text-align:center;font-weight:700;text-decoration:none;border:2px solid #ddd6fe}
.gbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin-bottom:10px}
.back{font-weight:700;text-decoration:none;font-size:15px}
.gtitle{margin:0;font-size:24px;flex:1}
.mini{display:flex;gap:6px;flex-wrap:wrap;align-items:center;width:100%}
.mini select{font:inherit;font-size:15px;padding:6px 8px;border-radius:10px;border:1px solid #c5b8f5;background:#fff;min-height:40px}
.ez{display:flex;align-items:center;gap:4px;font-size:15px;background:#fff;border-radius:10px;padding:4px 8px;border:1px solid #c5b8f5;min-height:40px}
.gbox{background:#fff;border-radius:var(--r);padding:14px 12px;box-shadow:0 3px 14px rgba(60,40,120,.08);border-top:6px solid var(--cat)}
.gbox.s-opp{border-top-color:var(--opp)}.gbox.s-syn{border-top-color:var(--syn)}
.how{margin:0 0 8px;color:var(--mut);font-size:15px}
.status{font-size:15px;margin-bottom:10px}
.note{background:var(--catl);border-radius:12px;padding:10px 14px}
.row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:10px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;font:inherit;font-weight:700;border:0;border-radius:12px;padding:10px 16px;background:var(--pri);color:#fff;cursor:pointer;text-decoration:none;min-height:46px}
.btn.big{font-size:19px;padding:12px 22px}
.btn.ghost{background:#fff;color:var(--pri);border:2px solid var(--pri)}
.btn.hint{background:#fab005;color:#3b2a00;margin-top:12px}
.btn:disabled{opacity:.5}
/* memory */
.mgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.mc{position:relative;border:0;padding:0;background:transparent;aspect-ratio:3/4;cursor:pointer;font:inherit;perspective:600px;min-height:84px}
.mc>span{position:absolute;inset:0;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;backface-visibility:hidden;-webkit-backface-visibility:hidden;transition:transform .35s;padding:4px;text-align:center}
.mc .back{background:repeating-linear-gradient(45deg,#7048e8,#7048e8 8px,#845ef7 8px,#845ef7 16px);color:#fff;font-size:28px;box-shadow:0 2px 6px rgba(0,0,0,.18)}
.s-opp .mc .back{background:repeating-linear-gradient(45deg,#f76707,#f76707 8px,#ff922b 8px,#ff922b 16px)}
.s-syn .mc .back{background:repeating-linear-gradient(45deg,#0ca678,#0ca678 8px,#20c997 8px,#20c997 16px)}
.mc .face{background:#fff;border:3px solid #d0bfff;transform:rotateY(180deg);font-weight:800;font-size:clamp(14px,4.2vw,22px);line-height:1.15;word-break:break-word}
.mc .face.fb{background:#fff9db;border-color:#ffd43b}
.mc.up .face,.mc.peek .face{transform:rotateY(0)}
.mc.up .back,.mc.peek .back{transform:rotateY(180deg)}
.mc.done .face{background:#d3f9d8;border-color:#40c057}
.mc .tag{font-size:11px;font-weight:600;color:#8a6d00;margin-top:4px}
.ce{font-size:28px;line-height:1}.cw{display:block}
@media(min-width:760px){.mgrid{max-width:720px;margin:0 auto}.mc{aspect-ratio:4/3}}
.bank{margin-top:12px;background:#fff9db;border-radius:12px;padding:8px 12px}.bank summary{cursor:pointer;font-weight:700}.bank ul{columns:2;margin:6px 0;padding-inline-start:18px}
/* tiles */
.tgrid{display:grid;gap:8px;grid-template-columns:repeat(3,1fr)}
.tgrid.c4{grid-template-columns:repeat(2,1fr)}
@media(min-width:560px){.tgrid.c4{grid-template-columns:repeat(4,1fr)}}
.tile{font:inherit;font-weight:800;font-size:clamp(15px,4.4vw,20px);min-height:64px;border-radius:12px;border:2px solid #d0bfff;background:#f8f6ff;color:var(--ink);cursor:pointer;padding:6px;line-height:1.2;word-break:break-word}
.tile.sel{background:#7048e8;color:#fff;border-color:#5f3dc4}
.s-syn .tile.sel{background:var(--syn);border-color:#087f5b}
.solved{display:flex;flex-direction:column;gap:6px;margin-bottom:8px}
.sgroup{background:#d3f9d8;border-radius:12px;padding:8px 12px;display:flex;flex-direction:column;animation:pop .3s}
.sgroup span{font-size:15px}
.wb{margin-top:12px;background:#fff9db;border-radius:12px;padding:8px 12px;font-size:15px}
.shake{animation:shake .45s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}
@keyframes pop{from{transform:scale(.9);opacity:0}to{transform:none;opacity:1}}
/* quartets */
.qm{margin-bottom:10px}
.qscore{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px;background:var(--catl);border-radius:12px;padding:8px 12px;font-size:15px}
.qmsg{min-height:48px;margin:10px 0;font-size:16px;background:#fff9db;border-radius:12px;padding:8px 12px}
.ask p{margin:4px 0}
.askb{background:#0ca678}
.hand-t{font-size:16px;margin:12px 0 6px}
.hand{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
@media(min-width:560px){.hand{grid-template-columns:repeat(3,1fr)}}
@media(min-width:900px){.hand{grid-template-columns:repeat(5,1fr)}}
.qcard{font:inherit;text-align:center;border-radius:12px;border:3px solid #ccc;background:#fff;padding:0 0 6px;cursor:pointer;display:flex;flex-direction:column;overflow:hidden;color:var(--ink)}
.qcard.sel{outline:4px solid #fab005}
.qh{font-size:13px;font-weight:700;color:#fff;padding:4px;background:#868e96}
.qw{font-size:20px;font-weight:800;padding:6px 4px 2px}
.ql{display:flex;flex-direction:column;font-size:13px;color:var(--mut)}
.ql i{font-style:normal}.ql i.me{font-weight:800;color:var(--ink)}.ql i.got{color:#2b8a3e}
.ql i.got::after{content:" ✓"}
.fam0{border-color:#f06595}.fam0 .qh{background:#f06595}
.fam1{border-color:#4dabf7}.fam1 .qh{background:#1c7ed6}
.fam2{border-color:#40c057}.fam2 .qh{background:#2f9e44}
.fam3{border-color:#fab005}.fam3 .qh{background:#e67700}
.fam4{border-color:#845ef7}.fam4 .qh{background:#7048e8}
.fam5{border-color:#15aabf}.fam5 .qh{background:#0c8599}
.laid{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.qdone{border-radius:10px;padding:6px 10px;font-size:14px;animation:pop .3s}
.qdone.mine{background:#d3f9d8}.qdone.his{background:#e7f5ff}
/* lotto */
.call{display:flex;flex-direction:column;align-items:center;background:linear-gradient(135deg,#7048e8,#f06595);color:#fff;border-radius:14px;padding:10px;margin-bottom:8px}
.s-opp .call{background:linear-gradient(135deg,#f76707,#fab005)}.s-syn .call{background:linear-gradient(135deg,#0ca678,#4dabf7)}
.cl{font-size:15px;opacity:.95}.cwd{font-size:28px;font-weight:800}
.lboard{display:grid;gap:6px;max-width:560px;margin:0 auto}
.lboard.s3{grid-template-columns:repeat(3,1fr)}.lboard.s4{grid-template-columns:repeat(4,1fr)}
.lcell{font:inherit;font-weight:800;font-size:clamp(13px,3.9vw,19px);aspect-ratio:1;border-radius:12px;border:2px solid #d0bfff;background:#f8f6ff;color:var(--ink);cursor:pointer;padding:3px;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.15;word-break:break-word}
.lcell.mark{background:#ffd43b;border-color:#f59f00;position:relative}
.lcell.mark::after{content:"⭐";position:absolute;top:2px;left:4px;font-size:14px}
.lcell.peek,.opt.peek{box-shadow:0 0 0 4px #40c057}
/* snakes */
.stop{display:flex;align-items:center;gap:12px;justify-content:center}
.die{font-size:46px;line-height:1}.die.spin{animation:spin .4s}
@keyframes spin{to{transform:rotate(360deg)}}
.qbox{margin:8px 0}
.qq{font-size:20px;font-weight:800;text-align:center;margin:6px 0 10px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.opt{font:inherit;font-weight:700;font-size:18px;min-height:56px;border-radius:12px;border:2px solid #d0bfff;background:#f8f6ff;color:var(--ink);cursor:pointer;padding:6px}
.opt.right{background:#d3f9d8;border-color:#2f9e44}.opt.wrong{background:#ffe3e3;border-color:#e03131}.opt.gone{visibility:hidden}
.sboard{position:relative;max-width:560px;margin:10px auto 0}
.sgrid{display:grid;grid-template-columns:repeat(6,1fr);border-radius:12px;overflow:hidden;border:2px solid #d0bfff}
.scell{aspect-ratio:1;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:12px;background:#fff;border:1px solid #eee}
.scell:nth-child(odd){background:#f8f6ff}
.scell.lad{background:#e6fcf5}.scell.snk{background:#fff0f6}.scell.fin{background:#fff3bf}
.sn{position:absolute;top:2px;right:4px;font-size:11px;color:#868e96}
.si{font-size:11px;margin-top:8px}
.tk{font-size:clamp(16px,5vw,24px);line-height:1;position:relative;z-index:2}
.sov{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.sov line.lad{stroke:#8d6e3f;stroke-width:.09;stroke-linecap:round;opacity:.55;stroke-dasharray:.12 .08}
.sov path.snk{stroke:#e64980;stroke-width:.1;fill:none;stroke-linecap:round;opacity:.5}
.legend{text-align:center;font-size:14px;color:var(--mut)}
/* speed */
.hud{display:flex;justify-content:space-around;font-size:18px;background:var(--catl);border-radius:12px;padding:8px}
.tbar{height:10px;background:#eee;border-radius:6px;overflow:hidden;margin:8px 0}.tbar i{display:block;height:100%;background:linear-gradient(90deg,#fa5252,#fab005,#40c057);transition:width 1s linear}
.qbox.sp{text-align:center;min-height:180px}
/* modal */
.modal{position:fixed;inset:0;background:rgba(20,15,50,.55);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal[hidden]{display:none}
.mcard{position:relative;overflow:hidden;background:#fff;border-radius:20px;padding:22px 18px;text-align:center;max-width:420px;width:100%;animation:pop .3s}
.mcard h2{margin:6px 0}.mbig{font-size:60px;line-height:1}
.confetti{position:absolute;inset:0;pointer-events:none}
.confetti i{position:absolute;top:-10px;width:9px;height:14px;border-radius:2px;animation:fall 2.2s ease-in forwards}
@keyframes fall{to{transform:translateY(480px) rotate(540deg);opacity:0}}
/* teacher */
.teach h1{margin:6px 0}.teach h2{margin:22px 0 8px;font-size:20px}.small{font-size:14px;color:var(--mut)}
.files{display:flex;flex-direction:column;gap:8px}
.frow2{display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:#fff;border-radius:12px;padding:8px 12px}
.frow2 span{flex:1;min-width:180px;font-weight:700}
.tscroll{overflow-x:auto;max-width:100%}
table.links{border-collapse:collapse;width:100%;background:#fff;border-radius:12px;font-size:15px}
table.links th,table.links td{border:1px solid #e5dbff;padding:6px;text-align:center}
table.links td a{display:inline-block;padding:4px 7px;margin:2px;border-radius:8px;background:var(--catl);text-decoration:none;font-weight:700}
.rules li{margin-bottom:8px}
.wl{background:#fff;border-radius:12px;padding:8px 12px;margin-bottom:10px;border-inline-start:6px solid var(--cat)}
.wl.s-opp{border-color:var(--opp)}.wl.s-syn{border-color:var(--syn)}
.wl summary{cursor:pointer;font-weight:800;font-size:17px}
.cols{columns:2;column-gap:24px;padding-inline-start:22px}
.cols.cat{columns:1}
@media(min-width:760px){.cols{columns:3}.cols.cat{columns:2}}
.cols li{break-inside:avoid;margin-bottom:3px}
footer{background:#2b2250;color:#e9e3ff;padding:18px 0 26px;font-size:15px}
footer a{color:#ffd8a8}
.frow{display:flex;align-items:center;gap:10px}
.cred{font-weight:800;font-size:17px;margin:0}
footer p{margin:4px 0}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}