/* SRS QuickLab Landing — scoped; does not style the Statistics lesson hub. */
.srs-ql-home{--qlh-bg:#0b0c29;--qlh-deep:#13103b;--qlh-lime:#c4ff48;--qlh-cyan:#3de5f2;--qlh-purple:#a36bfa;--qlh-ink:#f9f8ff;--qlh-muted:#d1c9ed;position:relative!important;left:50%!important;transform:translateX(-50%)!important;width:calc(100vw - 34px)!important;max-width:1500px!important;margin:24px 0 54px!important;isolation:isolate;overflow:hidden;color:var(--qlh-ink);background:radial-gradient(ellipse at 84% 6%,#3c1767 0,transparent 32%),radial-gradient(ellipse at 11% 49%,#251050 0,transparent 29%),linear-gradient(150deg,#0b0c29 0%,#111037 48%,#0b0e2b 100%);border:1px solid #5a47966a;border-radius:24px;font:500 16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif;box-sizing:border-box}
.srs-ql-home *{box-sizing:border-box}.srs-ql-home a{text-decoration:none}.srs-ql-home a:focus-visible{outline:3px solid var(--qlh-cyan);outline-offset:4px}.srs-ql-home h1,.srs-ql-home h2,.srs-ql-home h3,.srs-ql-home p{margin-top:0;color:inherit}.srs-ql-home em{font-style:normal}.srs-ql-home .qlh-glow{position:absolute;border-radius:50%;pointer-events:none;filter:blur(60px);opacity:.33;z-index:-1}.qlh-glow-one{width:440px;height:400px;background:#6338db;right:-220px;top:-160px}.qlh-glow-two{width:340px;height:300px;background:#1fa6e6;left:-240px;top:620px}.srs-ql-home .qlh-header{position:relative;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:23px clamp(22px,4vw,58px);border-bottom:1px solid #9e89db20;background:#050a234d}.srs-ql-home .qlh-logo{display:flex;gap:11px;align-items:center;color:white;flex:0 0 auto}.qlh-logo strong{display:block;font-size:25px;font-weight:900;letter-spacing:-1px;line-height:1.05}.qlh-logo em,.qlh-return h2 span,.qlh-about h2 span,.qlh-section-head h2 span{color:var(--qlh-lime)}.qlh-logo small{font-size:9px;display:block;letter-spacing:2.3px;color:#c9c2e9;margin-top:5px}.qlh-topnav{display:flex;align-items:center;gap:clamp(14px,2vw,32px)}.qlh-topnav a{font-size:14px;font-weight:750;color:#f2eeff}.qlh-topnav a:hover{color:var(--qlh-lime)}.qlh-topnav .qlh-nav-return{border:1px solid var(--qlh-lime);border-radius:50px;padding:11px 19px;white-space:nowrap}.qlh-nav-return span{color:var(--qlh-lime);margin-left:7px}.qlh-hero{padding:64px clamp(26px,5vw,72px) 42px;min-height:525px;display:grid;grid-template-columns:1.05fr 1fr;gap:35px;align-items:center;position:relative;z-index:2}.qlh-hero-copy{position:relative;z-index:2}.qlh-eyebrow{display:inline-flex;align-items:center;gap:10px;border:1px solid #bd66f5;border-radius:100px;background:#5a279a50;padding:7px 18px;font-size:11px;font-weight:850;letter-spacing:3px;box-shadow:0 0 26px #8e56e82c}.qlh-eyebrow span{color:var(--qlh-lime);font-size:19px}.qlh-hero h1{font-size:clamp(48px,5vw,79px);line-height:1.06;letter-spacing:-3px;font-weight:900;margin:20px 0 16px;max-width:740px}.qlh-hero h1 span{display:block;color:var(--qlh-lime);text-shadow:0 0 36px #b3ff4d40}.qlh-hero p{max-width:560px;font-size:clamp(17px,1.55vw,21px);color:#e9e3ff;line-height:1.45}.qlh-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:29px}.srs-ql-home .qlh-btn{display:inline-flex;justify-content:center;align-items:center;gap:12px;min-height:48px;border-radius:45px;padding:12px 24px;font-weight:850;font-size:15px;transition:transform .22s,box-shadow .22s,background .22s;white-space:normal;text-align:center}.srs-ql-home .qlh-btn:hover{transform:translateY(-3px)}.qlh-btn-primary{background:var(--qlh-lime);color:#111632!important;box-shadow:0 0 27px #baff4c48}.qlh-btn-primary:hover{box-shadow:0 0 39px #baff4c83}.qlh-btn-primary>span:first-child{font-size:12px}.qlh-btn-outline{border:1px solid #cbb1ff;color:#fff!important;background:#ffffff08;box-shadow:inset 0 0 16px #8061cf18}.qlh-btn-outline:hover{background:#6a43b53a}.qlh-tinyline{display:flex;align-items:center;gap:10px;margin-top:33px;font-size:10px;letter-spacing:1.5px;color:#d3cce7;font-weight:800;flex-wrap:wrap}.qlh-tinyline b{height:4px;width:4px;background:var(--qlh-cyan);border-radius:50%}
/* The science illustration is built with accessible SVG and CSS layers rather than a flat image. */
.qlh-hero-art{height:455px;position:relative;max-width:575px;width:100%;margin:0 auto;perspective:750px}.qlh-art-halo{position:absolute;inset:16% 8% 5%;background:radial-gradient(ellipse,#7934d375 0,#3c3ae836 40%,transparent 72%);border-radius:50%;filter:blur(13px);animation:qlh-pulse 6s ease-in-out infinite}.qlh-flask{position:absolute;width:80%;height:94%;left:10%;top:5%;filter:drop-shadow(0 0 23px #28e0ff8c);animation:qlh-hover 6s ease-in-out infinite}.qlh-art-ring{position:absolute;left:21%;bottom:8%;width:58%;height:18px;border:2px solid #5debff;border-radius:50%;box-shadow:0 0 18px #27e5ff,0 0 35px #a13cff;opacity:.7}.qlh-floating-tile{position:absolute;display:grid;place-items:center;border:1px solid #a57afc;background:linear-gradient(130deg,#4535a6ce,#171a5ac2);box-shadow:0 0 26px #984efb41,inset 0 0 21px #8e5ce22c;border-radius:14px;color:#e3c5ff;animation:qlh-float 5s ease-in-out infinite;font-weight:900;z-index:1}.qlh-floating-tile svg{width:100%;height:100%}.qlh-tile-bars{width:100px;height:75px;left:9%;top:13%;transform:rotate(-9deg)}.qlh-tile-ai{width:92px;height:85px;right:5%;top:7%;font-size:34px;animation-delay:-2s}.qlh-tile-atom{width:76px;height:73px;left:2%;top:47%;font-size:65px;animation-delay:-3s}.qlh-tile-graph{width:106px;height:75px;right:0%;top:48%;animation-delay:-1s}.qlh-tile-pi{width:53px;height:53px;right:12%;bottom:12%;font-family:Georgia,serif;font-size:44px;animation-delay:-3.5s}.qlh-horizon{height:115px;position:relative;margin:-55px 0 -12px;z-index:1;pointer-events:none;overflow:hidden}.qlh-wave{width:150%;height:200%;position:absolute;top:13px;left:-25%;border-top:3px solid #36e3fd;border-radius:50% 50% 0 0;background:radial-gradient(ellipse at 50% 10%,#1ddaff4c,transparent 65%),repeating-linear-gradient(90deg,#55caff16 0 1px,transparent 1px 22px);box-shadow:0 -12px 30px #219bdf40;transform:rotate(-1deg)}.qlh-scroll-cue{text-align:center;position:relative;z-index:2;color:#c7bce8;letter-spacing:5px;font-size:11px;font-weight:800;padding:10px 0 38px}.qlh-scroll-cue span{display:block;font-size:34px;color:#c9c3ff;line-height:1;margin-bottom:3px;animation:qlh-bob 2.3s ease-in-out infinite}
.qlh-about{margin:4px clamp(20px,4vw,56px) 72px;border-radius:35px;border:1px solid #9652f2;background:linear-gradient(115deg,#6129a266,#30155996 60%,#5b2c9f8c);box-shadow:0 0 33px #b24dff22,inset 0 0 37px #cf6bff12;min-height:246px;display:grid;grid-template-columns:.72fr 1fr;gap:40px;align-items:center;padding:25px clamp(18px,3vw,42px);position:relative}.qlh-about-copy{border-left:1px solid #b497ef88;padding-left:40px}.qlh-about h2,.qlh-section-head h2{font-size:clamp(32px,3.3vw,49px);letter-spacing:-1.5px;line-height:1.12;margin:0 0 10px;font-weight:900}.qlh-about p{font-size:17px;color:#f0ebff;max-width:675px;line-height:1.48}.qlh-chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}.qlh-chips span{border:1px solid #9657e4;border-radius:25px;background:#39206b;padding:8px 12px;font-size:12px;font-weight:800}.qlh-about-visual{position:relative;height:215px;display:flex;align-items:center;justify-content:center;filter:drop-shadow(0 0 22px #a346e76c)}.qlh-screen{position:relative;width:240px;height:155px;border:5px solid #9563fd;border-radius:13px;background:linear-gradient(120deg,#21134c,#30349b);box-shadow:16px 18px 0 -10px #634ae0}.qlh-screen-top{height:21px;border-bottom:1px solid #6f63b5;padding:6px}.qlh-screen-top i{display:inline-block;height:6px;width:6px;border-radius:100%;background:#f078d6;margin-right:4px}.qlh-screen-top i:nth-child(2){background:#83ff5e}.qlh-screen-top i:nth-child(3){background:#3cdeff}.qlh-play{width:55px;height:55px;background:radial-gradient(circle,#43d9fb,#2865c4);border-radius:50%;display:grid;place-items:center;position:absolute;left:38%;top:37%;box-shadow:0 0 27px #39deff;color:white}.qlh-small-bars{position:absolute;bottom:15px;left:19px;display:flex;align-items:end;height:50px;gap:8px}.qlh-small-bars i{display:block;width:12px;background:#54d7fb;height:24px;border-radius:3px}.qlh-small-bars i:nth-child(2){height:34px;background:#ad87f9}.qlh-small-bars i:nth-child(3){height:42px;background:#beff50}.qlh-small-bars i:nth-child(4){height:17px;background:#e870f4}.qlh-books{position:absolute;bottom:5px;left:0}.qlh-books span{display:block;width:85px;height:13px;border-radius:4px;background:#53effc;border:2px solid #c6a0ff;margin:3px;transform:rotate(-8deg)}.qlh-books span:nth-child(2){background:#9b73ff;width:95px}.qlh-books span:nth-child(3){background:#bdff4b;width:77px}.qlh-lightbulb{position:absolute;color:#e9ff65;top:0;right:13%;font-size:71px;text-shadow:0 0 21px #f5d53d;animation:qlh-pulse 3s infinite}
.qlh-courses{padding:0 clamp(24px,4vw,58px) 62px}.qlh-section-label{font-size:12px;font-weight:850;letter-spacing:4px;color:#ebe5fc;display:inline-block;margin-bottom:14px}.qlh-section-label:before{content:"";width:4px;height:16px;background:var(--qlh-lime);display:inline-block;vertical-align:-3px;margin-right:12px}.qlh-section-head{margin-bottom:30px}.qlh-section-head p{color:#c9c1e5;font-size:16px}.qlh-course-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.qlh-card{position:relative;border-radius:24px;padding:18px 18px 20px;border:1px solid #7561c3;background:linear-gradient(160deg,#29205d 0,#13163c 85%);box-shadow:inset 0 0 30px #9b59e114;min-width:0;min-height:455px;display:flex;flex-direction:column;transition:transform .28s,box-shadow .28s,border-color .28s}.qlh-card:hover{transform:translateY(-7px);border-color:#b58fff;box-shadow:0 16px 34px #170b40}.qlh-card-live{border:2px solid var(--qlh-lime);box-shadow:0 0 23px #c4ff4748,inset 0 0 25px #a4ff3b12;background:linear-gradient(160deg,#33236d,#111d3e 78%,#34206a)}.qlh-card-live:hover{box-shadow:0 0 34px #c4ff4791}.qlh-status{align-self:flex-start;border-radius:30px;background:#514584;color:#e4ddff;padding:7px 12px;font-size:10px;letter-spacing:1px;font-weight:900;white-space:nowrap}.qlh-status-live{background:var(--qlh-lime);color:#182131}.qlh-status i{display:inline-block;height:7px;width:7px;background:#182131;border-radius:50%;margin-right:4px}.qlh-card-art{height:152px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;margin:12px 0}.qlh-card-art:before{content:"";position:absolute;inset:20%;background:#8845d75c;filter:blur(30px)}.qlh-card-art svg{max-width:100%;width:215px;height:130px;position:relative;filter:drop-shadow(0 0 10px #4deaff50)}.qlh-art-data svg{width:175px}.qlh-chip{width:90px;height:90px;position:relative;border:6px solid #b5a8ff;background:linear-gradient(135deg,#4b48b5,#6529a5);box-shadow:0 0 30px #977eff7f;border-radius:16px;display:grid;place-items:center;font-size:42px;font-weight:900;color:#cfffff;text-shadow:0 0 13px #3de6f2}.qlh-chip:before,.qlh-chip:after{content:"";position:absolute;background:repeating-linear-gradient(90deg,#7cdcff 0 6px,transparent 6px 17px);width:130px;height:7px;left:-25px}.qlh-chip:before{top:-17px}.qlh-chip:after{bottom:-17px}.qlh-card h3{font-size:clamp(20px,1.8vw,27px);line-height:1.12;letter-spacing:-.6px;font-weight:900;margin:0 0 12px}.qlh-card h3 em{color:var(--qlh-lime)}.qlh-card p{font-size:13px;color:#e4def6;line-height:1.46;flex:1}.qlh-card-cta{width:100%;font-size:14px!important;margin-top:10px;padding:10px 16px!important;min-height:44px!important}.qlh-card-cta span{font-size:19px}.qlh-soon-label{display:block;border:1px solid #6556a1;background:#42366f;border-radius:26px;color:#d7ceef;font-size:12px;text-align:center;padding:10px;font-weight:750}.qlh-course-note{font-size:11px;color:#afa6cf;margin:17px 0 0;text-align:right}
.qlh-return{margin:0 clamp(20px,4vw,56px) 52px;border:1px solid #9864ec;border-radius:30px;background:linear-gradient(110deg,#53269e77,#211548cf);display:flex;align-items:center;justify-content:space-between;gap:22px;position:relative;overflow:hidden;padding:26px 30px 26px 150px;min-height:145px}.qlh-return-orbit{position:absolute;width:210px;height:170px;left:-92px;bottom:-80px;border-radius:50%;border:2px solid #aa6df5;background:radial-gradient(circle at 57% 22%,#a15bff9c,#2a1e71 66%,transparent 68%);box-shadow:0 0 42px #b83dfc}.qlh-return h2{font-size:clamp(20px,2vw,28px);line-height:1.2;margin:0 0 5px;font-weight:900}.qlh-return p{font-size:13px;color:#e0d8f6;margin:0}.qlh-return-button{border-color:var(--qlh-lime);font-size:13px!important;flex:0 0 auto}.qlh-footer{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid #74569a52;padding:20px clamp(22px,4vw,58px) 27px;color:#d2c9ee;font-size:12px}.qlh-footer strong{color:var(--qlh-lime)}
.qlh-particles i{position:absolute;background:#64efff;border-radius:50%;width:3px;height:3px;box-shadow:0 0 8px #3de8f3;pointer-events:none;animation:qlh-spark 8s ease-in-out infinite}.qlh-particles i:nth-child(1){top:120px;left:53%}.qlh-particles i:nth-child(2){top:210px;left:57%;animation-delay:-1s}.qlh-particles i:nth-child(3){top:390px;left:7%;animation-delay:-5s}.qlh-particles i:nth-child(4){top:560px;left:25%;animation-delay:-3s}.qlh-particles i:nth-child(5){top:220px;left:90%;animation-delay:-4s}.qlh-particles i:nth-child(6){top:72%;left:12%;animation-delay:-2s}.qlh-particles i:nth-child(7){top:82%;left:65%}.qlh-particles i:nth-child(8){top:62%;left:87%}.qlh-particles i:nth-child(9){top:43%;left:40%}.qlh-particles i:nth-child(10){top:38%;left:91%}.qlh-particles i:nth-child(11){top:22%;left:34%}.qlh-particles i:nth-child(12){top:80%;left:94%}
.qlh-js .qlh-reveal{opacity:1;translate:0 0}.qlh-js .qlh-reveal.qlh-inview{animation:qlh-appear .65s ease-out both}@keyframes qlh-appear{from{opacity:.65;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}.qlh-card:nth-child(2){transition-delay:80ms}.qlh-card:nth-child(3){transition-delay:150ms}.qlh-card:nth-child(4){transition-delay:220ms}@keyframes qlh-float{0%,100%{translate:0 0}50%{translate:0 -12px}}@keyframes qlh-hover{0%,100%{translate:0 0}50%{translate:0 -9px}}@keyframes qlh-pulse{0%,100%{opacity:.55}50%{opacity:.95}}@keyframes qlh-spark{0%,100%{opacity:.2;translate:0 0}50%{opacity:.95;translate:0 -20px}}@keyframes qlh-bob{0%,100%{translate:0 0}50%{translate:0 7px}}
@media(max-width:1120px){.qlh-hero{grid-template-columns:1fr .9fr;gap:10px}.qlh-hero-art{height:385px}.qlh-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.qlh-card{min-height:405px}.qlh-card-art{height:142px}.qlh-topnav{gap:17px}.qlh-logo small{letter-spacing:1px}}
@media(max-width:760px){.srs-ql-home{width:calc(100vw - 16px)!important;border-radius:15px;margin:16px 0 28px!important}.srs-ql-home .qlh-header{padding:17px 18px}.qlh-logo strong{font-size:20px}.qlh-logo small{font-size:7px;letter-spacing:.6px}.qlh-logo svg{height:36px;width:30px}.qlh-topnav>a:not(.qlh-nav-return){display:none}.qlh-topnav .qlh-nav-return{font-size:11px;padding:9px 11px}.qlh-hero{grid-template-columns:1fr;min-height:0;padding:48px 25px 5px;gap:0}.qlh-hero h1{font-size:clamp(42px,9vw,65px);letter-spacing:-2.2px}.qlh-hero p{font-size:17px}.qlh-hero-art{height:360px;margin-top:5px;max-width:480px}.qlh-horizon{margin-top:-40px;height:73px}.qlh-about{grid-template-columns:1fr;gap:12px;margin:4px 16px 52px;padding:24px 20px;border-radius:25px}.qlh-about-visual{height:165px;transform:scale(.8)}.qlh-about-copy{border-left:0;padding:0}.qlh-about h2{font-size:34px}.qlh-about p{font-size:15px}.qlh-courses{padding:0 18px 40px}.qlh-return{margin:0 16px 30px;padding:27px 22px 27px 80px;gap:15px;flex-direction:column;align-items:flex-start}.qlh-return-orbit{left:-140px}.qlh-return-button{font-size:12px!important}.qlh-scroll-cue{padding-bottom:34px}}
@media(max-width:470px){.qlh-topnav .qlh-nav-return{max-width:125px;line-height:1.15;text-align:center}.qlh-topnav .qlh-nav-return span{display:none}.qlh-hero{padding:38px 20px 0}.qlh-hero h1{font-size:clamp(38px,10vw,48px)}.qlh-actions{gap:10px}.srs-ql-home .qlh-btn{font-size:13px;padding:11px 17px}.qlh-hero-art{height:285px}.qlh-tile-bars{width:68px;height:57px}.qlh-tile-ai{width:67px;height:62px;font-size:24px}.qlh-tile-atom{width:55px;height:52px;font-size:45px}.qlh-tile-graph{width:70px;height:55px}.qlh-tile-pi{width:42px;height:41px;font-size:32px}.qlh-course-grid{grid-template-columns:1fr;gap:14px}.qlh-card{min-height:0}.qlh-card-art{height:142px}.qlh-card p{min-height:0}.qlh-return{padding:24px 20px 24px 70px}.qlh-return-button{white-space:normal}.qlh-tinyline{font-size:9px;gap:7px}.qlh-chips span{font-size:11px}.qlh-footer{padding:20px 18px}.qlh-scroll-cue{font-size:9px}}

/* v0.1.2: Orbit lines stay stationary; only the two light particles traverse them. */
.srs-ql-home .qlh-flask .qlh-electron-motion { pointer-events:none; }
.srs-ql-home .qlh-flask .qlh-electron-static { display:none; }
@media(prefers-reduced-motion:reduce){
  .srs-ql-home .qlh-flask .qlh-electron-motion { display:none; }
  .srs-ql-home .qlh-flask .qlh-electron-static { display:block; }
}
to{transform:rotate(-360deg)} }
@media(prefers-reduced-motion:reduce){.srs-ql-home *, .srs-ql-home *:before,.srs-ql-home *:after{animation:none!important;transition:none!important}.qlh-reveal{opacity:1;translate:none}}