/* ==================================================================
   MEHIRA "LAB" — premium interactive chapter design (General Science)
   Used by course-gs/chapter-NN.html · engine: lab.js · 3D: cradle.js
   ================================================================== */
:root{
  --bg:#09090c; --s1:#101015; --s2:#16161d; --s3:#1d1d26;
  --line:rgba(255,255,255,.08); --line2:rgba(255,255,255,.14);
  --gold:#f0c85a; --gold2:#c99a2e; --gold-a:rgba(240,200,90,.12);
  --cyan:#5de4c7; --cyan2:#2fb89c; --cyan-a:rgba(93,228,199,.12);
  --red:#ff7a70; --red-a:rgba(255,122,112,.12); --green:#4fd18f;
  --text:#eceae4; --muted:#a3a0aa; --faint:#6e6b77;
  --display:"Marcellus","Mukta",Georgia,serif;
  --body:"Mukta","Nirmala UI","Noto Sans Devanagari",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:22px; --ease:cubic-bezier(.16,.8,.3,1); --spring:cubic-bezier(.34,1.56,.64,1);
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font-family:var(--body);font-size:17px;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(1000px 600px at 90% -10%,rgba(93,228,199,.07),transparent 60%),
             radial-gradient(800px 500px at -10% 30%,rgba(240,200,90,.05),transparent 60%)}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:200;opacity:.045;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
a{color:var(--cyan);text-decoration:none}
b,strong{font-weight:700;color:#fff}
sup{font-size:.7em}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
.mono,.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.wrap{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding-inline:clamp(16px,4vw,32px)}

/* ---------- top bar ---------- */
.lbar{position:sticky;top:0;z-index:80;background:rgba(9,9,12,.72);backdrop-filter:saturate(150%) blur(16px);-webkit-backdrop-filter:saturate(150%) blur(16px);border-bottom:1px solid var(--line)}
.lbar-in{max-width:1320px;margin:0 auto;padding:10px clamp(16px,3vw,28px);display:flex;align-items:center;gap:14px}
.lbar .back{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14.5px;white-space:nowrap}
.lbar .back:hover{color:var(--text)}
.lbar .back i{font-style:normal;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;border:1px solid var(--line2)}
.lbar .ttl{font-weight:600;font-size:14.5px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.lbar .sp{flex:1}
.chip{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;padding:6px 12px;border-radius:999px;border:1px solid var(--line2);background:rgba(255,255,255,.03);white-space:nowrap}
.chip.xp{color:var(--gold);border-color:rgba(240,200,90,.35);background:var(--gold-a)}
.chip.fire{color:#ffb070;border-color:rgba(255,176,112,.3);background:rgba(255,176,112,.08)}
.chip .lv{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ring{--p:0;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font:600 10.5px var(--mono);color:var(--cyan);
  background:conic-gradient(var(--cyan) calc(var(--p)*1%),rgba(255,255,255,.08) 0)}
.ring::before{content:"";position:absolute}
.ring span{display:grid;place-items:center;width:27px;height:27px;border-radius:50%;background:var(--bg)}
.lbar .me-langsw{background:rgba(255,255,255,.04)!important;border:1px solid var(--line2)!important;border-radius:999px}
.lbar .me-langsw button{color:#c9c5bd!important;font-weight:600!important;padding:6px 10px!important}
.lbar .me-langsw button.on{background:var(--gold)!important;color:#15110a!important}
.pbar{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:linear-gradient(90deg,var(--cyan),var(--gold));box-shadow:0 0 12px rgba(93,228,199,.6)}
@media(max-width:760px){.lbar .ttl,.chip .lv,.lbar #meLang{display:none}.lbar-in{gap:8px}.chip{padding:5px 10px;font-size:12.5px}}

/* ---------- hero ---------- */
.hero{position:relative;z-index:1;max-width:1320px;margin:0 auto;padding:clamp(28px,5vw,64px) clamp(16px,3vw,28px) 24px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(20px,4vw,56px);align-items:center}
.hero-copy{display:grid;gap:18px;align-content:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan)}
.eyebrow b{color:var(--gold);font-weight:700}
.hero h1{font-family:var(--display);font-weight:400;font-size:clamp(40px,5.8vw,76px);line-height:1.02;letter-spacing:-.01em;color:#fff;text-wrap:balance}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,#b8fff0,var(--cyan) 40%,var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .tag{font-size:clamp(17px,1.6vw,19px);color:#c9c6cf;max-width:46ch}
.meta{display:flex;flex-wrap:wrap;gap:8px}
.meta span{font-size:13px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--s1);color:#cfccd4}
.meta span b{color:var(--gold);font-family:var(--mono);font-weight:600}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15.5px;border-radius:999px;padding:13px 24px;cursor:pointer;border:1px solid transparent;transition:transform .2s var(--ease),box-shadow .3s,background .3s,border-color .3s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.97)}
.btn.pri{background:linear-gradient(120deg,#b8fff0,var(--cyan) 45%,var(--cyan2));color:#04201a;box-shadow:0 10px 30px rgba(93,228,199,.25)}
.btn.gold{background:linear-gradient(120deg,#f7dc92,var(--gold) 45%,var(--gold2));color:#17120a;box-shadow:0 10px 30px rgba(240,200,90,.25)}
.btn.ghost{background:rgba(255,255,255,.03);border-color:var(--line2);color:var(--text)}
.btn.ghost:hover{border-color:rgba(93,228,199,.45)}
.btn.sm{padding:8px 15px;font-size:14px}

.stage3d{position:relative;aspect-ratio:1.18/1;border-radius:28px;overflow:hidden;border:1px solid var(--line);
  background:radial-gradient(ellipse at 50% 30%,#1b2a2a 0%,#0f1416 45%,#0a0a0d 80%);box-shadow:0 40px 90px rgba(0,0,0,.5)}
.stage3d canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;cursor:grab;opacity:0;transition:opacity 1s}
.stage3d.ready canvas{opacity:1}
.stage3d .s-top{position:absolute;left:16px;right:16px;top:14px;display:flex;justify-content:space-between;align-items:center;gap:8px;pointer-events:none}
.stage3d .s-top span{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);font-weight:700}
.stage3d .s-ctl{display:flex;gap:6px;pointer-events:auto}
.stage3d .s-ctl button{white-space:nowrap;appearance:none;border:1px solid var(--line2);background:rgba(9,9,12,.6);backdrop-filter:blur(8px);color:#d8d5dd;border-radius:999px;padding:5px 11px;font-size:12.5px;font-weight:600;cursor:pointer}
.stage3d .s-ctl button:hover{border-color:var(--cyan);color:var(--cyan)}
.stage3d .s-cap{position:absolute;left:0;right:0;bottom:0;padding:28px 16px 14px;background:linear-gradient(0deg,rgba(9,9,12,.85),rgba(9,9,12,0));font-size:13.5px;color:#c9c6cf;pointer-events:none;text-align:center}
.stage3d .s-cap b{color:var(--cyan)}
.stage3d .s-fallback{position:absolute;inset:0;display:none;place-items:center;text-align:center;padding:24px;color:var(--muted)}
.stage3d.no3d .s-fallback{display:grid}
.stage3d .s-fallback .big{font-family:var(--display);font-size:64px;color:var(--gold);line-height:1}
@media(max-width:900px){.hero{grid-template-columns:1fr}.stage3d{aspect-ratio:1/1;order:-1}}

/* ---------- missions ---------- */
.missions{position:relative;z-index:1;max-width:1320px;margin:8px auto 0;padding:0 clamp(16px,3vw,28px)}
.mgrid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.mis{display:flex;gap:12px;align-items:center;padding:14px 16px;border-radius:16px;border:1px solid var(--line);background:var(--s1);transition:border-color .4s,background .4s}
.mis .ck{flex:none;width:30px;height:30px;border-radius:50%;border:1.5px solid var(--line2);display:grid;place-items:center;font-size:14px;color:transparent;transition:all .4s var(--spring)}
.mis h4{font-size:14px;font-weight:600;color:#fff;line-height:1.3}
.mis p{font-size:12px;color:var(--faint);line-height:1.3}
.mis.done{border-color:rgba(79,209,143,.35);background:linear-gradient(135deg,rgba(79,209,143,.08),var(--s1))}
.mis.done .ck{background:var(--green);border-color:var(--green);color:#062414;transform:scale(1.08)}
.mis .xpv{margin-left:auto;font:600 12px var(--mono);color:var(--gold);white-space:nowrap}
@media(max-width:1000px){.mgrid{grid-template-columns:repeat(2,minmax(0,1fr))}.mgrid .mis:last-child{grid-column:1/-1}}
@media(max-width:520px){.mgrid{grid-template-columns:1fr}}

/* ---------- layout + dock ---------- */
.body{position:relative;z-index:1;max-width:1320px;margin:0 auto;padding:40px clamp(16px,3vw,28px) 80px;display:grid;grid-template-columns:220px minmax(0,1fr);gap:clamp(20px,4vw,56px)}
.dock{position:sticky;top:84px;align-self:start;display:grid;gap:4px}
.dock a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:12px;color:var(--muted);font-size:14.5px;font-weight:500;transition:background .25s,color .25s}
.dock a i{font-style:normal;width:26px;height:26px;display:grid;place-items:center;border-radius:8px;background:var(--s2);font-size:13px;flex:none}
.dock a:hover{color:var(--text);background:rgba(255,255,255,.03)}
.dock a.on{color:#fff;background:var(--cyan-a)}
.dock a.on i{background:var(--cyan);color:#04201a}
.dock .dl{font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);padding:0 12px 6px}
@media(max-width:900px){
  .body{grid-template-columns:minmax(0,1fr);padding-top:24px}
  .dock{position:fixed;top:auto;bottom:calc(10px + env(safe-area-inset-bottom,0px));left:50%;transform:translateX(-50%);z-index:90;display:flex;gap:2px;padding:6px;border-radius:999px;
    background:rgba(16,16,21,.86);backdrop-filter:blur(14px);border:1px solid var(--line2);box-shadow:0 14px 40px rgba(0,0,0,.6);max-width:calc(100vw - 20px);overflow-x:auto}
  .dock .dl{display:none}
  .dock a{padding:3px;font-size:0;gap:0}
  .dock a i{width:32px;height:32px;border-radius:50%;font-size:14px;background:transparent}
  .dock a.on{background:transparent}
}

/* ---------- section heads ---------- */
.sec{scroll-margin-top:84px;margin-bottom:clamp(56px,7vw,88px)}
.sh{display:grid;gap:8px;margin-bottom:24px}
.sh .k{font:600 12px var(--mono);letter-spacing:.14em;color:var(--cyan)}
.sh h2{font-family:var(--display);font-weight:400;font-size:clamp(30px,3.6vw,44px);line-height:1.08;color:#fff;text-wrap:balance}
.sh p{color:var(--muted);max-width:62ch}

/* ---------- reveal ---------- */
.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js [data-reveal].in{opacity:1;transform:none}

/* ---------- lesson cards ---------- */
.lesson{position:relative;padding:clamp(22px,3vw,34px);border-radius:var(--r);margin-bottom:18px;
  background:linear-gradient(var(--s1),var(--s1)) padding-box,linear-gradient(150deg,rgba(255,255,255,.12),rgba(255,255,255,.03) 45%,rgba(93,228,199,.14)) border-box;border:1px solid transparent}
.lesson > .no{position:absolute;right:22px;top:14px;font-family:var(--display);font-size:64px;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(93,228,199,.25);pointer-events:none}
.lesson h3{font-family:var(--display);font-weight:400;font-size:clamp(24px,2.6vw,30px);color:#fff;line-height:1.15;margin-bottom:10px;padding-right:70px}
.lesson h3 .st{font-size:.55em;vertical-align:middle;color:var(--gold);margin-left:6px}
.lesson p{color:#cfccd4;margin-bottom:12px;max-width:72ch}
.lesson p:last-child{margin-bottom:0}
.facts{display:grid;gap:8px;margin:14px 0 4px;padding:0;list-style:none}
.facts li{position:relative;padding:10px 14px 10px 40px;border-radius:12px;background:rgba(255,255,255,.025);border:1px solid var(--line);color:#d8d5dd}
.facts li::before{content:"";position:absolute;left:15px;top:19px;width:9px;height:9px;border-radius:3px;background:var(--cyan);transform:rotate(45deg);box-shadow:0 0 10px rgba(93,228,199,.6)}
.facts li.star::before{background:var(--gold);box-shadow:0 0 10px rgba(240,200,90,.6)}
.note{margin:14px 0;padding:16px 18px;border-radius:14px;border:1px solid rgba(240,200,90,.25);background:linear-gradient(135deg,var(--gold-a),transparent 70%);color:#e8e1cc}
.note .nt{display:block;font:600 11.5px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:6px}
.note.warn{border-color:rgba(255,122,112,.3);background:linear-gradient(135deg,var(--red-a),transparent 70%)}
.note.warn .nt{color:var(--red)}
.note.hr{border-color:rgba(93,228,199,.3);background:linear-gradient(135deg,var(--cyan-a),transparent 70%)}
.note.hr .nt{color:var(--cyan)}
.formula{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.formula span{font:600 16px var(--mono);padding:10px 16px;border-radius:12px;background:#0c1614;border:1px solid rgba(93,228,199,.3);color:#b8fff0}
.tw{overflow-x:auto;margin:14px 0;border-radius:14px;border:1px solid var(--line)}
table.t{border-collapse:collapse;width:100%;min-width:520px;font-size:15.5px}
.t th{text-align:left;font:600 11.5px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--faint);background:var(--s2);padding:12px 14px}
.t td{padding:12px 14px;border-top:1px solid var(--line);color:#d8d5dd;vertical-align:top}
.t tr:hover td{background:rgba(93,228,199,.03)}
.t td:first-child{color:#fff;font-weight:600}
.t .u{font-family:var(--mono);color:var(--cyan)}

/* 3D tilt tiles (units) */
.units{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px;margin:18px 0 8px;perspective:900px}
@media(max-width:860px){.units{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:460px){.units{grid-template-columns:repeat(3,minmax(0,1fr))}}
.unit{position:relative;aspect-ratio:.82;cursor:pointer;transform-style:preserve-3d;transition:transform .7s var(--spring)}
.unit.flip{transform:rotateY(180deg)}
.unit > div{position:absolute;inset:0;border-radius:16px;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:grid;place-items:center;align-content:center;gap:4px;text-align:center;padding:8px}
.unit .fr{background:radial-gradient(circle at 30% 20%,rgba(93,228,199,.18),rgba(93,228,199,.03)),var(--s2);border:1px solid rgba(93,228,199,.3)}
.unit .fr b{font:600 clamp(22px,2.6vw,30px) var(--mono);color:#b8fff0}
.unit .fr small{font-size:12px;color:var(--gold);font-weight:700;letter-spacing:.04em}
.unit .bk{transform:rotateY(180deg);background:linear-gradient(160deg,#2a2412,#15130c);border:1px solid rgba(240,200,90,.35)}
.unit .bk b{font-size:14px;color:var(--gold)}
.unit .bk small{font-size:12px;color:#cfc6ad;line-height:1.3}
.mnemo{display:flex;flex-wrap:wrap;gap:6px;align-items:baseline;margin:6px 0 2px;font-size:clamp(17px,2vw,21px);color:#cfccd4}
.mnemo span{opacity:.35;transition:opacity .4s,color .4s}
.mnemo span b{color:var(--cyan);font-size:1.15em}
.mnemo span.lit{opacity:1;color:#fff}

/* ---------- labs ---------- */
.lab{margin:20px 0;padding:22px;border-radius:20px;background:linear-gradient(180deg,#0e1716,#0c0f10);border:1px solid rgba(93,228,199,.22);position:relative;overflow:hidden}
.lab::before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(rgba(93,228,199,.05) 1px,transparent 1px) 0 0/100% 26px,linear-gradient(90deg,rgba(93,228,199,.05) 1px,transparent 1px) 0 0/26px 100%;mask-image:radial-gradient(ellipse at 50% 30%,#000 30%,transparent 80%);-webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 30%,transparent 80%)}
.lab > *{position:relative}
.lab .lh{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.lab .lh span{font:600 11.5px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);padding:4px 10px;border-radius:999px;border:1px solid rgba(93,228,199,.35)}
.lab .lh h4{font-size:17px;font-weight:600;color:#fff}
.lab .lh em{margin-left:auto;font-style:normal;font:600 12px var(--mono);color:var(--gold)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:6px;background:linear-gradient(90deg,var(--cyan) var(--v,50%),rgba(255,255,255,.1) 0);outline:none;margin:10px 0}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;border-radius:50%;background:#fff;border:5px solid var(--cyan);box-shadow:0 0 0 6px rgba(93,228,199,.18);cursor:grab}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:5px solid var(--cyan);cursor:grab}
.readout{display:flex;flex-wrap:wrap;gap:12px;align-items:stretch}
.readout .rv{flex:1;min-width:120px;padding:12px 16px;border-radius:14px;background:rgba(0,0,0,.35);border:1px solid var(--line)}
.readout .rv small{display:block;font:600 11px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.readout .rv b{font:600 clamp(26px,3vw,34px) var(--mono);color:#fff;line-height:1.2}
.readout .rv b i{font-style:normal;font-size:.5em;color:var(--muted);margin-left:4px}
.readout .rv.hl{border-color:rgba(93,228,199,.4)}
.readout .rv.hl b{color:var(--cyan)}
.road{position:relative;height:74px;margin:14px 0 6px;border-radius:14px;overflow:hidden;background:#101313;border:1px solid var(--line)}
.road::before{content:"";position:absolute;left:0;right:0;top:50%;height:3px;margin-top:-1.5px;background:repeating-linear-gradient(90deg,rgba(240,200,90,.8) 0 26px,transparent 26px 52px);background-size:52px 3px;animation:roadmv var(--dur,1s) linear infinite}
@keyframes roadmv{to{background-position:-52px 0}}
.road .car{position:absolute;left:18%;top:50%;transform:translateY(-50%);font-size:34px;filter:drop-shadow(0 4px 10px rgba(0,0,0,.6))}
.road.stop::before{animation:none}
.thermo{display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:center}
.tube{position:relative;width:26px;height:170px;margin:0 auto;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid var(--line2)}
.tube::after{content:"";position:absolute;left:50%;bottom:-18px;width:38px;height:38px;margin-left:-19px;border-radius:50%;background:var(--tc,#5de4c7);box-shadow:0 0 18px var(--tc,#5de4c7)}
.tube i{position:absolute;left:4px;right:4px;bottom:4px;border-radius:10px;background:var(--tc,#5de4c7);height:var(--th,40%);transition:height .2s,background .4s}
.badge-eq{display:inline-block;margin-top:8px;padding:6px 12px;border-radius:999px;font-weight:700;font-size:14px;color:#17120a;background:var(--gold);transform:scale(0);transition:transform .4s var(--spring)}
.badge-eq.on{transform:scale(1)}

/* sorter game */
.sort-pool{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 14px}
.tok{appearance:none;cursor:pointer;padding:9px 15px;border-radius:999px;border:1px solid var(--line2);background:var(--s2);color:#e4e1e8;font-weight:600;font-size:15px;transition:transform .3s var(--spring),background .3s,border-color .3s,opacity .3s}
.tok:hover{transform:translateY(-2px)}
.tok.sel{border-color:var(--gold);background:var(--gold-a);color:var(--gold);transform:scale(1.06)}
.tok.ok{border-color:rgba(79,209,143,.6);background:rgba(79,209,143,.12);color:#9ff0c4;cursor:default}
.tok.bad{animation:shake .4s}
@keyframes shake{20%,60%{transform:translateX(-6px)}40%,80%{transform:translateX(6px)}}
.bins{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.bin{min-height:120px;padding:14px;border-radius:16px;border:1.5px dashed var(--line2);background:rgba(0,0,0,.25);cursor:pointer;transition:border-color .3s,background .3s}
.bin:hover,.bin.ready{border-color:var(--cyan);background:var(--cyan-a)}
.bin h5{font-size:15px;color:#fff;font-weight:700;margin-bottom:8px}
.bin h5 small{font-weight:500;color:var(--faint);font-size:12.5px;margin-left:6px}
.bin .got{display:flex;flex-wrap:wrap;gap:6px}
.bin .got .tok{padding:5px 11px;font-size:13px}
.sort-msg{margin-top:10px;font-size:14.5px;color:var(--muted);min-height:1.6em}
.sort-msg.win{color:var(--green);font-weight:600}

/* newton cards */
.laws{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:16px 0}
@media(max-width:860px){.laws{grid-template-columns:1fr}}
.law{padding:20px;border-radius:18px;background:var(--s2);border:1px solid var(--line);display:grid;gap:10px;align-content:start;transition:transform .5s var(--ease),border-color .3s}
.law:hover{transform:translateY(-4px);border-color:rgba(93,228,199,.35)}
.law .ln{font:600 12px var(--mono);letter-spacing:.14em;color:var(--cyan)}
.law h4{font-family:var(--display);font-weight:400;font-size:24px;color:#fff;line-height:1.1}
.law .nick{font-size:13px;font-weight:700;color:var(--gold);letter-spacing:.06em}
.law p{font-size:15px;color:#c9c6cf;margin:0}
.anim{position:relative;height:96px;border-radius:14px;background:#0c1012;border:1px solid var(--line);overflow:hidden}
.a-bus .bus{position:absolute;left:12%;bottom:14px;width:92px;height:40px;border-radius:10px 16px 6px 6px;background:linear-gradient(180deg,#f0c85a,#c99a2e);animation:busgo 3.2s var(--ease) infinite}
.a-bus .bus::before,.a-bus .bus::after{content:"";position:absolute;bottom:-8px;width:16px;height:16px;border-radius:50%;background:#222;border:3px solid #555}
.a-bus .bus::before{left:12px}.a-bus .bus::after{right:12px}
.a-bus .man{position:absolute;left:40px;bottom:30px;width:10px;height:26px;border-radius:5px;background:#5de4c7;transform-origin:50% 100%;animation:lean 3.2s var(--ease) infinite}
@keyframes busgo{0%,15%{transform:translateX(0)}55%,100%{transform:translateX(90px)}}
@keyframes lean{0%,12%{transform:rotate(0)}20%{transform:rotate(-28deg)}40%,100%{transform:rotate(0)}}
.a-fma .box{position:absolute;bottom:14px;left:18%;width:calc(26px + var(--m,2)*8px);height:calc(26px + var(--m,2)*8px);border-radius:8px;background:linear-gradient(160deg,#5de4c7,#1e7f6c);animation:push var(--t,2s) var(--ease) infinite}
.a-fma .arrow{position:absolute;bottom:26px;left:4%;height:4px;width:calc(8px + var(--f,5)*5px);background:var(--gold);border-radius:4px;animation:push var(--t,2s) var(--ease) infinite}
.a-fma .arrow::after{content:"";position:absolute;right:-8px;top:-6px;border:8px solid transparent;border-left-color:var(--gold);border-right:0}
@keyframes push{0%,10%{translate:0 0}70%,100%{translate:120px 0}}
.fma-ctl{display:grid;grid-template-columns:auto 1fr auto;gap:4px 10px;align-items:center;font-size:13.5px;color:var(--muted)}
.fma-ctl b{font-family:var(--mono);color:#fff;font-weight:600}
.fma-ctl input{margin:4px 0}
.a-rocket .rk{position:absolute;left:50%;bottom:14px;margin-left:-12px;width:24px;height:52px;border-radius:12px 12px 4px 4px;background:linear-gradient(90deg,#d8d5dd,#fff,#b9b5c0);animation:lift 2.6s ease-in infinite}
.a-rocket .rk::after{content:"";position:absolute;left:4px;right:4px;top:100%;height:30px;border-radius:0 0 50% 50%;background:linear-gradient(180deg,#ffd27a,#ff7a3c 50%,transparent);animation:flame .12s linear infinite alternate}
.a-rocket .lbl{position:absolute;font:600 11px var(--mono);color:var(--muted)}
@keyframes lift{0%{transform:translateY(0)}100%{transform:translateY(-120px)}}
@keyframes flame{to{transform:scaleY(1.25)}}

/* friction race */
.race{display:grid;gap:10px;margin-top:10px}
.lane{position:relative;height:46px;border-radius:12px;background:#0f1113;border:1px solid var(--line);overflow:hidden}
.lane small{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:12.5px;color:var(--faint);font-weight:600}
.lane .obj{position:absolute;left:8px;top:50%;margin-top:-15px;width:30px;height:30px;transition:left 2.2s var(--ease)}
.lane.static .obj{border-radius:6px;background:#7a6a52}
.lane.slide .obj{border-radius:6px;background:var(--gold2)}
.lane.roll .obj{border-radius:50%;background:radial-gradient(circle at 35% 35%,#fff,var(--cyan) 45%,#1e7f6c)}
.race.go .static .obj{left:8px}
.race.go .slide .obj{left:45%}
.race.go .roll .obj{left:calc(100% - 110px);transform:rotate(720deg);transition:left 2.2s var(--ease),transform 2.2s var(--ease)}

/* tricks */
.tricks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
@media(max-width:760px){.tricks{grid-template-columns:1fr}}
.trick{padding:22px;border-radius:20px;background:var(--s1);border:1px solid var(--line);display:grid;gap:10px}
.trick .big{font-family:var(--display);font-size:clamp(22px,2.4vw,28px);line-height:1.2;color:#fff}
.trick .big b{color:var(--gold);font-weight:400}
.trick p{font-size:15px;color:#bfbcc6}
.trick .tn{font:600 11.5px var(--mono);letter-spacing:.14em;color:var(--gold)}

/* myth vs fact */
.myths{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;perspective:1000px}
.myth{position:relative;min-height:190px;cursor:pointer;transform-style:preserve-3d;transition:transform .8s var(--spring)}
.myth.flip{transform:rotateY(180deg)}
.myth > div{position:absolute;inset:0;border-radius:18px;padding:20px;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:grid;align-content:center;gap:8px}
.myth .mf{background:linear-gradient(160deg,#2a1515,#141012);border:1px solid rgba(255,122,112,.35)}
.myth .mb{transform:rotateY(180deg);background:linear-gradient(160deg,#10271f,#0f1413);border:1px solid rgba(79,209,143,.35)}
.myth .tg{font:600 11.5px var(--mono);letter-spacing:.14em}
.myth .mf .tg{color:var(--red)} .myth .mb .tg{color:var(--green)}
.myth p{font-size:16px;color:#e8e5ea;line-height:1.5}
.myth .hint{font-size:12px;color:var(--faint)}

/* flash deck */
.deckwrap{display:grid;justify-items:center;gap:16px}
.deck{position:relative;width:min(100%,520px);aspect-ratio:1.55;perspective:1200px}
.card{position:absolute;inset:0;transform-style:preserve-3d;transition:transform .7s var(--spring),opacity .45s;cursor:pointer}
.card > div{position:absolute;inset:0;border-radius:24px;padding:28px;display:grid;place-items:center;text-align:center;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.card .cf{background:radial-gradient(circle at 20% 0%,rgba(93,228,199,.18),transparent 60%),linear-gradient(160deg,#182322,#101315);border:1px solid rgba(93,228,199,.3);box-shadow:0 30px 60px rgba(0,0,0,.5)}
.card .cb{transform:rotateY(180deg);background:radial-gradient(circle at 80% 0%,rgba(240,200,90,.2),transparent 60%),linear-gradient(160deg,#2a2412,#15130c);border:1px solid rgba(240,200,90,.35);box-shadow:0 30px 60px rgba(0,0,0,.5)}
.card .cf p{font-size:clamp(19px,2.4vw,24px);color:#fff;font-weight:600;line-height:1.35}
.card .cb p{font-size:clamp(19px,2.4vw,24px);color:#f3e6bf;line-height:1.4}
.card .cb p b{color:var(--gold)}
.card small{position:absolute;bottom:14px;left:0;right:0;text-align:center;font-size:12px;color:var(--faint)}
.card .cno{position:absolute;top:14px;left:18px;font:600 12px var(--mono);color:var(--cyan)}
.card.flip{transform:rotateY(180deg)}
.card.back1{transform:translateY(14px) scale(.95);opacity:.55;pointer-events:none}
.card.back2{transform:translateY(28px) scale(.9);opacity:.25;pointer-events:none}
.card.gone{opacity:0;pointer-events:none;transform:translateX(120%) rotate(18deg)}
.card.gone.l{transform:translateX(-120%) rotate(-18deg)}
.card.hide{opacity:0;pointer-events:none}
.deckbar{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.deckstat{font:600 13.5px var(--mono);color:var(--muted)}
.deckstat b{color:var(--green)}

/* revision list */
.rev-search{width:100%;padding:13px 18px;border-radius:14px;border:1px solid var(--line2);background:var(--s1);color:#fff;font:inherit;margin-bottom:12px}
.rev{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
@media(max-width:760px){.rev{grid-template-columns:1fr}}
.rv-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:12px 16px;border-radius:12px;background:var(--s1);border:1px solid var(--line)}
.rv-row span{color:var(--muted);font-size:14.5px}
.rv-row b{font-family:var(--mono);font-weight:600;font-size:14px;color:var(--cyan);text-align:right}

/* quiz game */
.quiz{border-radius:26px;padding:clamp(20px,3vw,34px);background:linear-gradient(180deg,#12121a,#0d0d12);border:1px solid var(--line2);box-shadow:0 30px 80px rgba(0,0,0,.4)}
.qtop{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.qdots{display:flex;gap:5px;flex-wrap:wrap;flex:1}
.qdots i{width:16px;height:6px;border-radius:4px;background:rgba(255,255,255,.1);transition:background .3s,width .3s}
.qdots i.cur{background:var(--cyan);width:26px}
.qdots i.ok{background:var(--green)} .qdots i.no{background:var(--red)} .qdots i.sk{background:transparent;outline:1px dashed var(--faint)}
.combo{font:600 13px var(--mono);color:#ffb070;opacity:0;transition:opacity .3s}
.combo.on{opacity:1}
.qq{font-size:clamp(20px,2.4vw,25px);font-weight:600;color:#fff;line-height:1.4;margin-bottom:18px}
.qq small{display:block;font:600 12px var(--mono);letter-spacing:.14em;color:var(--cyan);margin-bottom:8px}
.qopts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:640px){.qopts{grid-template-columns:1fr}}
.qo{appearance:none;display:flex;gap:12px;align-items:center;text-align:left;padding:15px 16px;border-radius:14px;border:1px solid var(--line2);background:var(--s2);color:#e8e5ea;font-size:16px;cursor:pointer;transition:transform .25s var(--ease),border-color .25s,background .25s}
.qo:hover:not(:disabled){transform:translateY(-2px);border-color:rgba(93,228,199,.5)}
.qo i{font-style:normal;flex:none;display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:rgba(255,255,255,.06);font:600 13px var(--mono);color:var(--muted)}
.qo.ok{border-color:var(--green);background:rgba(79,209,143,.12)} .qo.ok i{background:var(--green);color:#062414}
.qo.no{border-color:var(--red);background:var(--red-a);animation:shake .4s} .qo.no i{background:var(--red);color:#2a0b08}
.qo:disabled{cursor:default}
.qex{margin-top:14px;padding:14px 16px;border-radius:14px;background:rgba(93,228,199,.07);border:1px solid rgba(93,228,199,.25);color:#d6f5ee;font-size:15.5px;display:none}
.qex.on{display:block;animation:rise .45s var(--ease)}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.qnav{display:flex;justify-content:space-between;align-items:center;margin-top:16px;gap:10px}
.qres{display:grid;justify-items:center;gap:14px;text-align:center;padding:10px 0}
.qring{--p:0;width:170px;height:170px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--c,var(--cyan)) calc(var(--p)*1%),rgba(255,255,255,.07) 0);transition:--p 1s}
.qring div{width:142px;height:142px;border-radius:50%;background:#0d0d12;display:grid;place-items:center;align-content:center}
.qring b{font:600 44px var(--mono);color:#fff;line-height:1}
.qring small{font-size:13px;color:var(--muted)}
.qres h3{font-family:var(--display);font-weight:400;font-size:30px;color:#fff}
.qres p{color:var(--muted)}
.qreview{width:100%;display:grid;gap:8px;text-align:left;margin-top:6px}
.qreview div{padding:12px 14px;border-radius:12px;background:var(--s1);border:1px solid var(--line);font-size:14.5px;color:#cfccd4}
.qreview div.no{border-color:rgba(255,122,112,.35)}
.qreview div b{color:var(--green)}

/* summary + complete */
.saar{padding:clamp(22px,3vw,34px);border-radius:var(--r);background:linear-gradient(160deg,rgba(240,200,90,.08),var(--s1) 60%);border:1px solid rgba(240,200,90,.25);font-size:17.5px;color:#e4e1e8}
.saar b{color:var(--gold)}
.finish{margin-top:22px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}
@media(max-width:760px){.finish{grid-template-columns:minmax(0,1fr)}}
.fin .btn{white-space:normal;text-align:center}
.fin{padding:24px;border-radius:20px;border:1px solid var(--line);background:var(--s1);display:grid;gap:10px;align-content:start}
.fin h4{font-family:var(--display);font-weight:400;font-size:24px;color:#fff}
.fin p{color:var(--muted);font-size:15px}
.fin.next{background:linear-gradient(135deg,rgba(93,228,199,.1),var(--s1) 60%);border-color:rgba(93,228,199,.3)}
.cbtn.done{background:linear-gradient(120deg,#9ff0c4,var(--green));color:#062414}
.donate{margin-top:40px;padding:2px;border-radius:24px;background:linear-gradient(120deg,var(--gold2),var(--gold),var(--cyan),var(--gold2));background-size:300% 300%;animation:dnb 8s linear infinite}
@keyframes dnb{to{background-position:300% 50%}}
.donate > div{border-radius:22px;background:#0f0f14;padding:26px 22px;text-align:center;display:grid;justify-items:center;gap:10px}
.donate h4{font-family:var(--display);font-weight:400;font-size:26px;color:#fff}
.donate p{color:var(--muted);max-width:48ch;font-size:15px}
.dn-chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.dn-chips > div{text-align:center}
.dn-chips > div > small{display:block;font:600 12px var(--mono);color:var(--gold);margin-bottom:3px}
.lfoot{position:relative;z-index:1;text-align:center;padding:30px 16px 110px;color:var(--faint);font-size:13.5px;border-top:1px solid var(--line)}
.lfoot b{color:var(--muted)}

/* toast + confetti */
.toast{position:fixed;left:50%;top:78px;z-index:120;transform:translate(-50%,-20px);opacity:0;padding:10px 18px;border-radius:999px;background:rgba(20,20,26,.95);border:1px solid rgba(240,200,90,.4);color:var(--gold);font-weight:700;font-size:14.5px;box-shadow:0 14px 40px rgba(0,0,0,.5);pointer-events:none;transition:all .45s var(--spring);white-space:nowrap}
.toast.on{opacity:1;transform:translate(-50%,0)}
#confetti{position:fixed;inset:0;pointer-events:none;z-index:110}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .js [data-reveal]{opacity:1;transform:none}
}

.body > main{min-width:0}
@media(max-width:520px){.stage3d .s-top span{font-size:10.5px;letter-spacing:.12em}.stage3d .s-ctl button{padding:4px 9px;font-size:12px}}

/* ---------- brand (Mehira) ---------- */
.brand{display:flex;align-items:center;gap:10px;color:#fff;white-space:nowrap}
.brand img{width:34px;height:34px;border-radius:50%;border:1px solid rgba(240,200,90,.55);box-shadow:0 0 14px rgba(240,200,90,.25);background:#000}
.brand b{font-family:var(--display);font-weight:400;font-size:18px;letter-spacing:.02em;color:#fff}
.brand b span{color:var(--gold)}
.lbar .sep{flex:none;width:1px;height:22px;background:var(--line2)}
.hbrand{display:flex;align-items:center;gap:14px;padding:8px 20px 8px 8px;border-radius:999px;width:fit-content;max-width:100%;
  border:1px solid rgba(240,200,90,.3);background:linear-gradient(90deg,rgba(240,200,90,.12),rgba(240,200,90,0) 85%)}
.hbrand img{flex:none;width:58px;height:58px;border-radius:50%;box-shadow:0 0 34px rgba(240,200,90,.35);background:#000}
.hbrand b{display:block;font-family:var(--display);font-weight:400;font-size:clamp(19px,2vw,23px);letter-spacing:.1em;color:#fff;line-height:1.1}
.hbrand b span{color:var(--gold)}
.hbrand small{display:block;font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);opacity:.9}
@media(max-width:760px){.brand b span,.lbar .back span,.lbar .sep{display:none}.brand img{width:30px;height:30px}.hbrand img{width:48px;height:48px}}
.eyebrow{flex-wrap:wrap;justify-content:flex-start;gap:4px 10px;width:fit-content;max-width:100%}
@media(max-width:520px){.eyebrow{font-size:11.5px;letter-spacing:.14em}.hbrand{gap:10px;padding-right:14px}.hbrand b{letter-spacing:.05em;font-size:18px}.hbrand small{letter-spacing:.06em;font-size:10.5px}}

/* ---------- timeline lab ---------- */
.tl-card{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;align-items:center;padding:18px 20px;border-radius:16px;background:rgba(0,0,0,.35);border:1px solid rgba(240,200,90,.3);margin:6px 0 10px}
.tl-card.pop{animation:rise .45s var(--ease)}
.tl-card .yr{grid-row:span 3;font:600 clamp(26px,3.4vw,40px) var(--mono);color:var(--gold);line-height:1}
.tl-card h5{font-family:var(--display);font-weight:400;font-size:clamp(20px,2.2vw,24px);color:#fff;line-height:1.2}
.tl-card p{font-size:15px;color:#cfccd4;margin:0}
.tl-card small{font:600 12px var(--mono);letter-spacing:.1em;color:var(--cyan);text-transform:uppercase}
.tl-dots{display:flex;justify-content:space-between;gap:4px;margin-top:4px;overflow-x:auto;padding-bottom:4px}
.tl-dots button{appearance:none;background:none;border:0;cursor:pointer;display:grid;justify-items:center;gap:4px;min-width:44px;color:var(--faint);font:600 10.5px var(--mono)}
.tl-dots i{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.12);border:2px solid var(--line2);transition:all .3s var(--spring)}
.tl-dots button.past i{background:rgba(240,200,90,.4);border-color:transparent}
.tl-dots button.on i{background:var(--gold);border-color:#fff;transform:scale(1.35);box-shadow:0 0 12px rgba(240,200,90,.7)}
.tl-dots button.on{color:var(--gold)}
@media(max-width:520px){.tl-card{grid-template-columns:1fr}.tl-card .yr{grid-row:auto}}
/* ---------- match game ---------- */
.m-top{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}
.m-q{display:grid;justify-items:center;gap:2px;text-align:center;padding:18px;border-radius:16px;background:rgba(0,0,0,.35);border:1px solid var(--line);margin-bottom:12px}
.m-q small{font:600 11px var(--mono);letter-spacing:.14em;color:var(--faint);text-transform:uppercase}
.m-q b{font-family:var(--display);font-weight:400;font-size:clamp(26px,3.4vw,36px);color:var(--gold);line-height:1.2}
.m-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.m-opts .tok{border-radius:12px;padding:12px}
.m-opts .tok:disabled{cursor:default}
.m-end{display:grid;justify-items:center;gap:8px;text-align:center;padding:16px}
.m-end b{font-size:40px;color:#fff}
.m-end p{color:var(--muted)}
/* ---------- history map hero ---------- */
.pinlab{position:absolute;left:0;top:0;pointer-events:none;white-space:nowrap;padding:5px 12px;border-radius:10px;background:rgba(9,9,12,.9);border:1px solid var(--gold2);font-family:var(--display);font-size:15px;color:var(--gold);transform:translate(-50%,-150%);transition:opacity .2s}
.pcard{position:absolute;left:14px;right:14px;bottom:14px;padding:14px 16px;border-radius:16px;background:rgba(9,9,12,.9);backdrop-filter:blur(8px);border:1px solid var(--line2);display:grid;gap:2px;pointer-events:none}
.pcard .pc-era{font:600 11px var(--mono);letter-spacing:.14em;text-transform:uppercase}
.pcard h5{font-family:var(--display);font-weight:400;font-size:22px;color:#fff;line-height:1.15}
.pcard h5 small{font-family:var(--body);font-size:13px;color:var(--muted);margin-left:8px;letter-spacing:0}
.pcard p{font-size:14.5px;color:#d8d5dd;margin:0}
.stage3d .s-ctl button.on{border-color:var(--gold);color:var(--gold);background:var(--gold-a)}
.stage3d .s-ctl i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;vertical-align:1px}
@media(max-width:520px){.stage3d .s-ctl{flex-wrap:wrap;justify-content:flex-end}.pcard h5{font-size:19px}}

/* ---------- v5: PYQ tag + photo figure ---------- */
.qq small .pyq{color:var(--gold);font-weight:600;letter-spacing:.14em}
.pic{margin:18px 0 6px;border-radius:18px;overflow:hidden;border:1px solid var(--line2);background:#000;position:relative}
.pic img{display:block;width:100%;height:auto;max-height:420px;object-fit:cover;filter:saturate(.92) contrast(1.04)}
.pic figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;background:linear-gradient(transparent,rgba(0,0,0,.85));font-size:14px;color:#e9e6ee}
.pic figcaption b{color:var(--gold)}
@media(max-width:900px){#hmap{aspect-ratio:.86/1}}
/* ---------- v6: Hindi (Devanagari) pages ---------- */
body.dev{--display:'Marcellus','Tiro Devanagari Hindi',serif}
body.dev *{letter-spacing:0!important}
body.dev .lesson h3,body.dev .sh h2,body.dev .hero h1{line-height:1.3}
.pic.tall img{max-height:560px;object-position:50% 20%}

/* ===== Maths "Formula Lab" hero (mathstage.js) ===== */
.mstage,#hmap.mstage{aspect-ratio:auto;min-height:540px;display:flex;flex-direction:column;justify-content:flex-end;padding:96px 14px 14px}
.mstage canvas{cursor:default}
.mstage .mcalc{position:relative;z-index:2;border-radius:18px;background:rgba(9,9,12,.84);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line2);padding:14px 16px 12px;display:grid;gap:10px}
.mc-head h5{font-family:var(--display);font-weight:400;font-size:21px;color:#fff;line-height:1.15;margin:0}
.mc-head p{margin:2px 0 0;font-size:13.5px;color:var(--muted)}
.mc-grid{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}
.mc-in{display:grid;gap:8px;min-width:0}
.mc-row{display:grid;grid-template-columns:minmax(78px,auto) 1fr 64px;align-items:center;gap:10px;font-size:13.5px;color:#d8d5dd}
.mc-row span{white-space:nowrap}
.mc-row output{font:600 14px var(--mono);color:var(--gold);text-align:right}
.mc-row input[type=range]{width:100%;min-width:0;margin:8px 0;cursor:pointer}
.mc-out{display:flex;align-items:center;gap:12px}
.mc-ring{width:92px;height:92px;flex:none}
.mc-ring circle{fill:none;stroke-width:9}
.mc-ring .bg{stroke:rgba(255,255,255,.08)}
.mc-ring .fg{stroke:var(--cyan);stroke-linecap:round;transform:rotate(-90deg);transform-origin:60px 60px;stroke-dasharray:0 100;transition:stroke-dasharray .45s cubic-bezier(.2,.8,.2,1)}
.mc-ring .rv{fill:#fff;font:600 22px var(--mono);text-anchor:middle}
.mc-ring .rl{fill:var(--muted);font:500 11px var(--body,sans-serif);text-anchor:middle}
.mc-res{display:grid;gap:6px;min-width:120px}
.mc-res small{display:block;font:600 11.5px var(--mono);letter-spacing:.02em;color:var(--cyan)}
.mc-res b{font-family:var(--mono);font-weight:600;color:#fff;font-size:17px}
.mc-res .main b{font-size:30px;color:var(--gold);text-shadow:0 0 24px rgba(240,200,90,.35)}
.mc-res b[data-s]::after{content:attr(data-s);font-size:.6em;margin-left:3px;color:var(--muted)}
.mc-f{display:flex;gap:10px;align-items:baseline;border-top:1px solid var(--line);padding-top:9px;flex-wrap:wrap}
.mc-f span{font:600 10.5px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.mc-f code{font:500 14px var(--mono);color:#e6e3ea;white-space:normal;word-break:break-word}
.mc-f code b{color:var(--gold)}
.mc-hint{margin:0;font-size:12px;color:var(--faint,#77737f)}
.mstage .s-top{z-index:3}
.mstage .s-top{flex-direction:column;align-items:flex-start;gap:8px}.mstage .s-ctl{max-width:100%;justify-content:flex-start}
@media(max-width:560px){
  .mstage,#hmap.mstage{min-height:560px;padding:92px 10px 10px}
  .mc-grid{grid-template-columns:1fr}
  .mc-out{justify-content:space-between}
  .mc-row{grid-template-columns:72px 1fr 58px;font-size:13px}
  .mc-res .main b{font-size:26px}
}

/* ===== Paywall lock card (gate.js) ===== */
.stage3d.mlock{aspect-ratio:auto;min-height:420px;display:flex;align-items:center;justify-content:center;padding:22px;
  background:radial-gradient(ellipse at 50% 0%,rgba(240,200,90,.14),transparent 60%),radial-gradient(ellipse at 50% 100%,rgba(93,228,199,.10),transparent 55%),#0c0c10}
.mlock-in{max-width:460px;width:100%;display:grid;gap:12px;text-align:left}
.mlock-k{font:600 11.5px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--gold)}
.mlock-in h4{font-family:var(--display);font-weight:400;font-size:25px;line-height:1.2;color:#fff;margin:0}
.mlock-in p{margin:0;color:#cfccd4;font-size:14.5px}
.mlock-msg{color:#ffb4a6!important;font-weight:600}
.mlock-wait{color:var(--muted)!important;text-align:center}
.mlock-plans{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mplan{display:grid;gap:2px;padding:12px 14px;border-radius:14px;border:1px solid var(--line2);background:rgba(255,255,255,.03);text-decoration:none;color:#e6e3ea;transition:border-color .2s,transform .2s}
.mplan:hover{border-color:var(--gold);transform:translateY(-2px)}
.mplan b{font-family:var(--mono);font-size:22px;color:#fff}
.mplan span{font-size:12.5px;color:var(--muted);line-height:1.35}
.mplan.best{border-color:rgba(240,200,90,.55);background:var(--gold-a)}
.mplan.best b{color:var(--gold)}
.mlock-how{font-size:13px!important;color:var(--muted)!important}
.mlock-how b{color:#e6e3ea}
.mlock-how a{color:var(--cyan)}
.mlock-cta{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:12px}
.mlock-cta span{font-size:13.5px;color:#cfccd4}
body.locked .missions,body.locked .dock{display:none}
@media(max-width:520px){.mlock-plans{grid-template-columns:1fr}.stage3d.mlock{min-height:0}}
.hero:has(#mSlot) .cta{display:none}