/* English Elevator "arcade" theme: Student Resources hub, homepage badge, level-test extras.
   Pure CSS. No external fonts, images, scripts or CDNs (they are blocked in China). */
:root{
  --ar-bg:#1a1545; --ar-bg2:#241d63; --ar-ink:#f4f1ff; --ar-dim:#b9b3e6;
  --ar-cyan:#3df0ff; --ar-pink:#ff5fd2; --ar-yellow:#ffd23f; --ar-green:#62ff9a; --ar-red:#ff6a6a; --ar-line:#0b0825;
  --ar-mono:ui-monospace,"SFMono-Regular","Menlo","Consolas","Courier New",monospace;
}

/* pixel border: notched corners using box-shadow */
.px{position:relative;border:0;box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line),0 8px 0 0 rgba(0,0,0,.35)}

/* ---------- homepage badge (slightly out of place on purpose) ---------- */
.sr-badge{position:fixed;z-index:60;right:16px;bottom:16px;display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ar-ink);
  background:linear-gradient(180deg,var(--ar-bg2),var(--ar-bg));padding:10px 16px 10px 12px;transform:rotate(-3deg);font-family:var(--ar-mono);
  box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line),6px 10px 0 0 rgba(0,0,0,.28),0 0 0 6px rgba(61,240,255,.0);
  animation:sr-bob 2.4s ease-in-out infinite}
.sr-badge:hover,.sr-badge:focus-visible{background:linear-gradient(180deg,#3a2f95,#241d63);outline:3px dashed var(--ar-yellow);outline-offset:6px}
.sr-badge .sr-gem{flex:none;width:34px;height:34px;display:block;image-rendering:pixelated}
.sr-badge b{display:block;font-size:1.05rem;letter-spacing:.04em;color:var(--ar-yellow);line-height:1.15;text-shadow:2px 2px 0 var(--ar-line)}
.sr-badge small{display:block;font-size:.66rem;letter-spacing:.14em;color:var(--ar-cyan);margin-top:2px}
.sr-badge .sr-new{position:absolute;right:-10px;top:-14px;background:var(--ar-pink);color:#fff;font-size:.62rem;font-weight:800;padding:2px 6px;letter-spacing:.08em;transform:rotate(8deg);
  box-shadow:0 -2px 0 0 var(--ar-line),0 2px 0 0 var(--ar-line),-2px 0 0 0 var(--ar-line),2px 0 0 0 var(--ar-line);animation:sr-blink 1.1s steps(2,jump-none) infinite}
@keyframes sr-bob{0%,100%{transform:rotate(-3deg) translateY(0)}50%{transform:rotate(-3deg) translateY(-5px)}}
@keyframes sr-blink{50%{opacity:.35}}
@media (max-width:560px){.sr-badge{right:10px;bottom:10px;padding:8px 12px 8px 9px}.sr-badge b{font-size:.92rem}.sr-badge .sr-gem{width:28px;height:28px}}
.nav .nav-game{background:var(--ar-bg);color:var(--ar-yellow);font-family:var(--ar-mono);font-weight:800;letter-spacing:.03em}
.nav .nav-game:hover{background:var(--ar-bg2)}

/* ---------- hub page ---------- */
body.arcade{background:var(--ar-bg);color:var(--ar-ink)}
.arcade .site-header{background:rgba(26,21,69,.96);border-bottom:4px solid var(--ar-line)}
.arcade .site-header .logo,.arcade .site-header .logo strong{color:#fff}
.arcade .site-header .logo strong{color:var(--ar-yellow)}
.arcade .nav a{color:var(--ar-ink)}
.arcade .nav a:hover{background:rgba(255,255,255,.1)}
.arcade .nav .nav-cta{background:var(--ar-yellow);color:#241d63}
.arcade .lang-switch{background:var(--ar-bg2);border-color:var(--ar-line)}
.arcade .lang-switch a,.arcade .lang-switch span{color:var(--ar-ink)}
.arcade .lang-switch .on{background:var(--ar-cyan);color:#10123a}
.hub{position:relative;overflow:hidden;min-height:70vh;
  background:
    radial-gradient(circle at 15% 8%,rgba(255,95,210,.22),transparent 40%),
    radial-gradient(circle at 90% 20%,rgba(61,240,255,.2),transparent 45%),
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px) 0 0/100% 8px,
    var(--ar-bg)}
.hub .wrap{max-width:980px}
.hub h1,.hub h2,.hub h3{font-family:var(--ar-mono);color:var(--ar-ink);letter-spacing:.01em}
.hub p{color:var(--ar-dim)}
.hub a{color:var(--ar-cyan)}
.hub-hero{padding:44px 0 18px;text-align:center}
.hub-hero .eyebrow-px{display:inline-block;font-family:var(--ar-mono);font-size:.78rem;letter-spacing:.2em;color:var(--ar-green);margin-bottom:12px}
.hub-hero h1{font-size:clamp(2rem,7.4vw,3.6rem);line-height:1.1;margin:0 0 .3em;color:var(--ar-yellow);text-shadow:3px 3px 0 var(--ar-pink),6px 6px 0 var(--ar-line)}
.hub-hero .sub{font-family:var(--ar-mono);font-size:clamp(.9rem,3vw,1.15rem);color:var(--ar-cyan);letter-spacing:.14em;margin:0 0 18px}
.hub-hero .lead{max-width:600px;margin:0 auto 22px;font-size:1.08rem;color:var(--ar-ink)}
.press{display:inline-block;font-family:var(--ar-mono);font-weight:800;font-size:1.1rem;letter-spacing:.1em;text-decoration:none;color:#241d63!important;background:var(--ar-yellow);padding:14px 26px;
  box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line),0 8px 0 0 #b98a00;animation:sr-blink2 1.4s steps(2,jump-none) infinite}
.press:hover{background:#fff27a;animation:none}
.press:active{transform:translateY(4px);box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line)}
@keyframes sr-blink2{50%{filter:brightness(.88)}}
.pcard{display:none;max-width:460px;margin:22px auto 0;background:var(--ar-bg2);padding:14px 18px;text-align:left;font-family:var(--ar-mono);color:var(--ar-ink)}
.pcard.on{display:block}
.pcard b{color:var(--ar-yellow)}
.pcard small{display:block;color:var(--ar-dim);margin-top:4px;font-size:.78rem}
.pcard button{font:inherit;font-size:.78rem;background:none;border:0;color:var(--ar-cyan);cursor:pointer;text-decoration:underline;padding:4px 0}

.hsec{padding:36px 0 8px}
.hsec>h2{font-size:clamp(1.3rem,4.6vw,1.9rem);margin:0 0 6px;text-transform:uppercase}
.hsec>h2 i{font-style:normal;color:var(--ar-pink)}
.hsec>.lead2{margin:0 0 18px;max-width:640px}

.steps4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px 18px;margin:20px 0 0;padding:0;list-style:none;counter-reset:st}
.steps4 li{position:relative;background:var(--ar-bg2);padding:20px 14px 16px;text-align:center;counter-increment:st;
  box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line),0 8px 0 0 rgba(0,0,0,.35)}
.steps4 li::before{content:"0" counter(st);position:absolute;left:50%;top:-18px;transform:translateX(-50%);font-family:var(--ar-mono);font-weight:800;background:var(--ar-pink);color:#fff;padding:2px 10px;font-size:.95rem;
  box-shadow:0 -3px 0 0 var(--ar-line),0 3px 0 0 var(--ar-line),-3px 0 0 0 var(--ar-line),3px 0 0 0 var(--ar-line)}
.steps4 li:not(:last-child)::after{content:"\25B6";position:absolute;right:-19px;top:50%;margin-top:-10px;color:var(--ar-yellow);font-size:.9rem;z-index:2}
.steps4 h3{font-size:1.02rem;margin:8px 0 4px;color:var(--ar-yellow)}
.steps4 p{margin:0 0 12px;font-size:.88rem;line-height:1.5;color:var(--ar-dim)}
.steps4 .go{display:inline-block;font-family:var(--ar-mono);font-weight:800;font-size:.82rem;color:#10123a!important;background:var(--ar-cyan);padding:7px 12px;text-decoration:none;letter-spacing:.05em;
  box-shadow:0 -3px 0 0 var(--ar-line),0 3px 0 0 var(--ar-line),-3px 0 0 0 var(--ar-line),3px 0 0 0 var(--ar-line)}
.steps4 .go:hover{background:#9bf7ff}
.steps4 .ico{display:block;margin:0 auto;width:44px;height:44px;image-rendering:pixelated}

.worlds{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:22px 20px;margin:18px 0 0;padding:0;list-style:none}
.world{position:relative;display:flex;flex-direction:column;gap:6px;padding:18px 16px 16px;background:var(--ar-bg2);
  box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line),0 8px 0 0 rgba(0,0,0,.35)}
.world .lv{font-family:var(--ar-mono);font-weight:800;font-size:.8rem;letter-spacing:.14em;color:var(--ar-green)}
.world h3{font-size:1.2rem;margin:0;color:var(--ar-yellow)}
.world .zhn{font-size:.92rem;color:var(--ar-cyan);font-weight:700;margin:-2px 0 2px}
.world p{margin:0;font-size:.9rem;line-height:1.5}
.world .who{font-size:.8rem;color:var(--ar-dim);font-family:var(--ar-mono)}
.world .gem{width:54px;height:54px;image-rendering:pixelated;margin-bottom:2px}
.world.live{background:linear-gradient(180deg,#2f2790,#241d63);outline:3px solid var(--ar-yellow);outline-offset:6px}
.world.locked .gem{filter:grayscale(.85) brightness(.8)}
.world.reco::before{content:attr(data-reco);position:absolute;right:10px;top:-14px;background:var(--ar-green);color:#10123a;font-family:var(--ar-mono);font-weight:800;font-size:.72rem;padding:3px 8px;letter-spacing:.06em;
  box-shadow:0 -3px 0 0 var(--ar-line),0 3px 0 0 var(--ar-line),-3px 0 0 0 var(--ar-line),3px 0 0 0 var(--ar-line)}
.tag{display:inline-block;font-family:var(--ar-mono);font-weight:800;font-size:.7rem;letter-spacing:.1em;padding:3px 8px;align-self:flex-start}
.tag.live{background:var(--ar-green);color:#10123a}
.tag.soon{background:#4a4390;color:#e4e0ff}
.wbtn{margin-top:auto;appearance:none;border:0;cursor:pointer;font-family:var(--ar-mono);font-weight:800;font-size:.84rem;letter-spacing:.04em;text-align:center;text-decoration:none;padding:11px 12px;display:block;
  box-shadow:0 -3px 0 0 var(--ar-line),0 3px 0 0 var(--ar-line),-3px 0 0 0 var(--ar-line),3px 0 0 0 var(--ar-line)}
.wbtn.start{background:var(--ar-yellow);color:#241d63!important}
.wbtn.start:hover{background:#fff27a}
.wbtn.tell{background:#3a3380;color:#fff}
.wbtn.tell:hover{background:#4a42a0}
.wnote{font-size:.78rem;color:var(--ar-green);min-height:1.2em;font-family:var(--ar-mono);margin:6px 0 0}

.powerups{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin:18px 0 0}
.pu{display:block;text-decoration:none;background:var(--ar-bg2);padding:16px 16px 14px;color:var(--ar-ink)!important;
  box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line),0 8px 0 0 rgba(0,0,0,.35)}
.pu:hover{background:#2f2790;transform:translateY(-2px)}
.pu b{display:block;font-family:var(--ar-mono);color:var(--ar-yellow);font-size:1.05rem;margin-bottom:4px}
.pu span{font-size:.88rem;color:var(--ar-dim);line-height:1.5;display:block}
.pu em{display:inline-block;margin-top:8px;font-style:normal;font-family:var(--ar-mono);font-weight:800;font-size:.8rem;color:var(--ar-cyan)}

.promise{margin:40px auto 0;padding:16px 18px;background:rgba(0,0,0,.28);border-left:6px solid var(--ar-green);font-size:.92rem;color:var(--ar-ink);max-width:760px}
.promise b{color:var(--ar-green);font-family:var(--ar-mono)}
.teacher-note{margin:34px auto 60px;max-width:760px;display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center;padding:16px 18px;background:var(--ar-bg2);
  box-shadow:0 -4px 0 0 var(--ar-line),0 4px 0 0 var(--ar-line),-4px 0 0 0 var(--ar-line),4px 0 0 0 var(--ar-line)}
.teacher-note img{width:92px;height:92px;object-fit:cover;background:#fff;padding:4px}
.teacher-note p{margin:0;color:var(--ar-ink);font-size:.95rem}
.teacher-note small{color:var(--ar-dim);display:block;margin-top:4px}
.arcade .site-footer{background:#0b0825;border-top:4px solid var(--ar-line)}

@media (max-width:780px){
  .steps4{grid-template-columns:1fr 1fr}
  .steps4 li:not(:last-child)::after{display:none}
}
@media (max-width:480px){
  .steps4{grid-template-columns:1fr}
  .teacher-note{grid-template-columns:1fr;justify-items:center;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  .sr-badge,.sr-badge .sr-new,.press{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- level test extras (build on learn.css) ---------- */
.age.picked{border-color:var(--teal);background:#f1fbfb;box-shadow:0 0 0 3px rgba(42,140,140,.25)}
.lvpick{margin:30px 0 0;text-align:center}
.lvpick h2{font-size:1.35rem;margin:0 0 4px}
.lvpick .lead2{color:var(--muted);font-size:.95rem;margin:0 auto 14px;max-width:520px}
.lvgrid{display:grid;gap:10px;margin:0;padding:0;list-style:none;text-align:left}
.lvbtn{appearance:none;width:100%;display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;background:#1a1545;color:#f4f1ff;border:0;padding:12px 16px;cursor:pointer;font:inherit;text-align:left;
  box-shadow:0 -3px 0 0 #0b0825,0 3px 0 0 #0b0825,-3px 0 0 0 #0b0825,3px 0 0 0 #0b0825,0 6px 0 0 rgba(0,0,0,.25);transition:transform .12s,background .12s}
.lvbtn:hover,.lvbtn:focus-visible{background:#2f2790;transform:translateX(4px);outline:none}
.lvbtn:active{transform:translateY(3px)}
.lvbtn .n{font-family:var(--ar-mono);font-weight:800;color:#ffd23f;font-size:1.05rem;white-space:nowrap}
.lvbtn .t{display:block;font-weight:700}
.lvbtn .t small{display:block;font-weight:400;color:#b9b3e6;font-size:.84rem}
.lvbtn .go{font-family:var(--ar-mono);color:#3df0ff;font-weight:800;font-size:.8rem;white-space:nowrap}
.lvbtn.sug{outline:3px dashed #62ff9a;outline-offset:4px}
.lvnote{font-size:.84rem;color:var(--muted);margin:14px 0 0}
#qnote{font-size:.86rem;font-weight:700;color:var(--accent-2);text-align:center;margin:10px 0 0}
.skipnote{font-size:.78rem;color:#9fb2c6;margin:-8px 0 12px}
.sc-cl{margin:0 0 14px;padding:8px 10px;background:#1a1545;color:#ffd23f;font-family:var(--ar-mono);font-weight:800;font-size:.92rem;border-radius:10px;border:2px solid #3df0ff}
.sc-scan{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.1);border-radius:14px;padding:10px;margin:0 0 12px;text-align:left}
.sc-scan img{flex:none;width:84px;height:84px;background:#fff;border-radius:10px;padding:5px}
.sc-scan p{margin:0;font-size:.8rem;color:#e8eef5;line-height:1.45}
.sc-scan b{display:block;color:#fff;font-size:.9rem;letter-spacing:.01em}
.priv{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:20px;margin-top:22px}
.priv h3{margin:0 0 4px;font-size:1.1rem}
.priv .eyebrow{margin-bottom:.2em}
.priv p.note{font-size:.84rem;color:var(--muted);margin:.3em 0 12px;background:#eef8f2;border-left:4px solid var(--ok,#1f8a4c);padding:8px 12px;border-radius:0 10px 10px 0}
.pf{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.pf label{display:block;font-size:.8rem;color:var(--muted);margin-bottom:4px;font-weight:600}
.pf input{width:100%;font:inherit;font-size:1rem;padding:10px 12px;border:2px solid var(--line);border-radius:12px;background:#fff}
.pf input:focus{outline:none;border-color:var(--teal)}
.pf .full{grid-column:1/-1}
.priv .linkbtn{padding:8px 0}
.cl-panel{border:3px solid #1a1545;background:linear-gradient(180deg,#241d63,#1a1545);color:#f4f1ff;margin-top:22px;border-radius:20px;padding:22px 20px;text-align:center;box-shadow:var(--shadow)}
.cl-panel .eyebrow{color:#62ff9a;font-family:var(--ar-mono)}
.cl-panel h2{color:#ffd23f;font-family:var(--ar-mono);font-size:1.3rem}
.cl-panel p{color:#d9d4ff}
.cl-panel .acts{display:grid;gap:10px;max-width:340px;margin:14px auto 0}
.cl-panel .btn-copy.gold{background:#ffd23f;color:#241d63;display:block;text-align:center;text-decoration:none}
.cl-panel .clmsg,.shotmsg{font-size:.82rem;color:#62ff9a;margin:10px 0 0;min-height:1.2em}
.shotmsg{color:#9fe8c0}
.hublink{text-align:center;margin-top:22px}
.hublink a{display:inline-block;background:#1a1545;color:#ffd23f;font-family:var(--ar-mono);font-weight:800;padding:12px 18px;text-decoration:none;border-radius:6px}
.wb{background:#fff;border:2px dashed var(--teal);border-radius:14px;padding:10px 14px;margin:16px auto 0;max-width:420px;font-weight:600;color:var(--navy);text-align:center}
@media (max-width:560px){.pf{grid-template-columns:1fr}.lvbtn{grid-template-columns:auto 1fr}.lvbtn .go{display:none}}
/* three cards on the homepage free section */
@media (min-width:900px){.free-grid:has(a[href*="student-resources"]){grid-template-columns:repeat(3,1fr);max-width:1040px}}
.nav .nav-game{white-space:nowrap}