:root{
  --primary:#6254E8;
  --primary-2:#5144DA;
  --primary-soft:#EEEAFE;
  --blue:#5BB7E8;
  --blue-soft:#DFF2FF;
  --green:#48B982;
  --green-soft:#DDF5E9;
  --yellow:#F3C94B;
  --yellow-soft:#FFF0B8;
  --pink:#F8E1EF;
  --peach:#FFF0E7;
  --bg:#F7F8FC;
  --surface:#FFFFFF;
  --surface-2:#FBFBFE;
  --text:#202338;
  --muted:#73778A;
  --line:#E7E8F0;
  --shadow-sm:0 5px 20px rgba(45,48,84,.07);
  --shadow:0 14px 42px rgba(44,43,83,.10);
  --shadow-strong:0 22px 58px rgba(49,55,104,.16);
  --radius:22px;
  --radius-sm:15px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Manrope,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
button,input{font:inherit}
button{color:inherit}
img{max-width:100%;display:block}
.app-shell{display:grid;grid-template-columns:224px minmax(0,1fr);min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;background:#fff;border-right:1px solid var(--line);padding:18px 14px 16px;display:flex;flex-direction:column;z-index:60}
.brand{height:62px;display:flex;align-items:center;padding:4px 6px 10px;text-decoration:none;overflow:hidden}
.brand img{width:174px;height:auto;mix-blend-mode:multiply}
.nav{display:flex;flex-direction:column;gap:6px;margin-top:5px}
.nav-item{width:100%;border:0;background:transparent;border-radius:14px;padding:9px 10px;display:flex;align-items:center;gap:11px;cursor:pointer;font-size:13px;font-weight:700;color:#50566E;text-align:left;transition:.18s ease}
.nav-item img{width:30px;height:30px;border-radius:10px;object-fit:cover;box-shadow:0 4px 10px rgba(71,76,130,.06)}
.nav-item:hover{background:#F6F7FC;color:#2D3150;transform:translateX(2px)}
.nav-item.active{background:linear-gradient(135deg,#ECF3FF,#F2EEFF);color:#3478E5;box-shadow:inset 0 0 0 1px rgba(98,84,232,.06)}
.side-companion{margin-top:auto;min-height:200px;position:relative;display:flex;align-items:flex-end;justify-content:center;padding-bottom:0;overflow:hidden}
.side-companion img{width:152px;transform:translateY(8px);filter:drop-shadow(0 12px 17px rgba(54,42,30,.13));mix-blend-mode:multiply}
.side-bubble{position:absolute;left:4px;top:8px;z-index:2;background:linear-gradient(145deg,#EEF1FF,#F8F6FF);border-radius:22px 22px 22px 7px;padding:13px 14px;font-size:11px;line-height:1.45;font-weight:800;color:#45506D;box-shadow:var(--shadow-sm);transform:rotate(-4deg)}
.side-bottom{border-top:1px solid var(--line);padding-top:10px;display:grid;gap:3px}
.utility-btn{border:0;background:transparent;padding:8px 10px;border-radius:11px;display:flex;gap:10px;align-items:center;color:var(--muted);font-weight:600;cursor:pointer;text-align:left}
.utility-btn:hover{background:#F7F8FC;color:var(--text)}
.main{min-width:0}
.topbar{height:74px;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:0 28px;position:sticky;top:0;z-index:50}
.mobile-brand{display:none}
.search-wrap{position:relative;flex:1;max-width:640px}
.search-wrap>svg{position:absolute;left:15px;top:50%;transform:translateY(-50%);width:18px;height:18px;fill:none;stroke:#858A9F;stroke-width:2;stroke-linecap:round}
.search-wrap input{width:100%;height:44px;border:1px solid var(--line);border-radius:14px;background:#F8F9FC;padding:0 18px 0 43px;outline:none;color:var(--text);transition:.18s ease}
.search-wrap input:focus{background:#fff;border-color:#C7C0FF;box-shadow:0 0 0 4px rgba(98,84,232,.09)}
.search-results{display:none;position:absolute;left:0;right:0;top:50px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:8px;box-shadow:var(--shadow);z-index:90}
.search-results.open{display:block}
.search-result{padding:10px 12px;border-radius:11px;cursor:pointer;font-size:13px;font-weight:700}
.search-result:hover{background:#F5F4FF}
.search-result small{display:block;color:var(--muted);font-size:10px;font-weight:500;margin-top:3px}
.icon-btn{margin-left:auto;width:43px;height:43px;border-radius:13px;border:1px solid var(--line);background:#fff;position:relative;cursor:pointer;box-shadow:0 4px 16px rgba(49,54,91,.03)}
.icon-btn span{font-size:17px}
.icon-btn i{position:absolute;right:5px;top:4px;min-width:17px;height:17px;border-radius:9px;padding:0 4px;background:#F45568;color:#fff;font-size:9px;font-style:normal;display:grid;place-items:center;font-weight:800;border:2px solid white}
.profile-chip{border:0;background:transparent;display:flex;align-items:center;gap:9px;padding:5px 7px;border-radius:14px;cursor:pointer}
.profile-chip:hover{background:#F6F7FB}
.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(145deg,#785FF4,#4E83F4);display:grid;place-items:center;color:white;font-weight:800;box-shadow:0 5px 14px rgba(98,84,232,.22)}
.profile-copy{display:block;text-align:left;line-height:1.15}.profile-copy b{font-size:12px}.profile-copy small{display:block;color:var(--muted);font-size:9px;margin-top:3px}.chevron{color:#9498A8;font-size:14px}
.view{display:none;padding:22px 28px 92px;max-width:1420px;margin:0 auto}.view.active{display:block;animation:viewIn .22s ease both}@keyframes viewIn{from{opacity:.3;transform:translateY(4px)}to{opacity:1;transform:none}}
.hero{min-height:258px;border-radius:28px;overflow:hidden;position:relative;background:linear-gradient(125deg,#FFF5E8 0%,#E8F3FF 47%,#E5E2FF 100%);box-shadow:var(--shadow);display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.95fr);isolation:isolate}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 17% 22%,rgba(255,255,255,.95),transparent 35%),linear-gradient(90deg,rgba(255,255,255,.24),transparent 55%);pointer-events:none;z-index:-1}
.hero-copy{padding:32px 34px;display:flex;flex-direction:column;justify-content:center;position:relative;z-index:3}
.hero-kicker{display:inline-flex;align-items:center;gap:7px;font-size:10px;font-weight:800;color:#5B51C9;background:rgba(255,255,255,.73);border:1px solid rgba(98,84,232,.12);border-radius:999px;padding:7px 10px;width:max-content;margin-bottom:10px}
.hero h1{font-size:34px;line-height:1.08;margin:0 0 8px;letter-spacing:-.035em}.hero p{font-size:14px;line-height:1.6;color:#4D5369;max-width:520px;margin:0 0 18px}.hero-actions{display:flex;gap:9px;align-items:center}.primary,.secondary,.ghost{border-radius:13px;padding:12px 17px;font-weight:800;cursor:pointer;transition:.18s ease}.primary{border:0;background:linear-gradient(135deg,#5F53EB,#4B80F3);color:white;box-shadow:0 10px 22px rgba(82,80,229,.24)}.primary:hover{transform:translateY(-2px);box-shadow:0 13px 26px rgba(82,80,229,.28)}.secondary{border:1px solid var(--line);background:#fff;color:var(--text)}.secondary:hover{border-color:#C7C0FF;background:#FBFAFF}.ghost{border:0;background:transparent;color:#4D55A3;padding-left:8px;padding-right:8px}
.hero-art{position:relative;min-height:258px;overflow:hidden}.hero-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;border-radius:0;transform:scale(1.012)}
.hero-art::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#EEF0FC 0%,rgba(238,240,252,.18) 20%,transparent 42%);z-index:1;pointer-events:none}
.hero-progress{display:flex;align-items:center;gap:10px;margin-top:13px;font-size:10px;color:#686D82}.hero-progress .bar{width:160px;height:7px;background:rgba(255,255,255,.85);border-radius:999px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(49,54,91,.05)}.hero-progress .bar span{display:block;height:100%;width:33%;background:linear-gradient(90deg,#39C99E,#5A7DF4);border-radius:inherit}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;margin:22px 2px 11px;gap:12px}.section-title h2{font-size:19px;line-height:1.2;margin:0;letter-spacing:-.02em}.section-title p{font-size:11px;color:var(--muted);margin:4px 0 0}.section-link{border:0;background:transparent;color:#3478E5;font-size:11px;font-weight:800;cursor:pointer;padding:4px 0}.section-link:hover{text-decoration:underline}
.current-card{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:18px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow-sm)}
.current-main{display:grid;grid-template-columns:90px minmax(0,1fr);gap:17px;align-items:center}.topic-icon{width:90px;height:90px;border-radius:20px;overflow:hidden;background:linear-gradient(145deg,#F8F4FF,#DFF2FF);box-shadow:inset 0 0 0 1px rgba(85,88,130,.04)}.topic-icon img{width:100%;height:100%;object-fit:cover}.current-copy h3{margin:4px 0 5px;font-size:19px;letter-spacing:-.02em}.eyebrow{font-size:9px;color:#665AE4;font-weight:800;text-transform:uppercase;letter-spacing:.10em}.meta-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.pill{display:inline-flex;align-items:center;gap:4px;border-radius:999px;padding:5px 8px;background:#F4F5FA;color:#666B7E;font-size:9px;font-weight:700}.pill.active{background:#E7F2FF;color:#3678D3}.current-copy p{font-size:12px;color:#686D81;margin:8px 0 10px;line-height:1.55}.progress-row{display:flex;align-items:center;gap:10px}.progress{height:7px;background:#EBEDF4;border-radius:100px;overflow:hidden;flex:1}.progress>span{display:block;height:100%;background:linear-gradient(90deg,#42CFA0,#5B65EF);border-radius:inherit}.progress-label{font-size:10px;font-weight:800;color:#52586D}.current-side{display:flex;flex-direction:column;gap:9px;justify-content:center;padding:4px}.current-side .primary{width:100%}.mini-stat{font-size:10px;color:var(--muted);text-align:center}
.topic-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}.topic-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:11px;min-height:168px;cursor:pointer;transition:.18s ease;position:relative;overflow:hidden}.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}.topic-card.active{border-color:#6A60EA;box-shadow:0 0 0 2px #EEEAFE}.topic-card.locked{cursor:not-allowed}.topic-number{position:absolute;left:10px;top:9px;width:24px;height:24px;border-radius:50%;background:#F5F6FA;color:#73788E;display:grid;place-items:center;font-size:9px;font-weight:800;z-index:2}.topic-art{height:76px;display:grid;place-items:center;margin-top:4px}.topic-art img{width:72px;height:72px;object-fit:cover;border-radius:17px}.topic-card h3{font-size:11px;line-height:1.3;margin:3px 0 7px;min-height:28px}.status{display:flex;align-items:center;gap:5px;font-size:9px;font-weight:700;color:#9296A5}.status.done{color:#3AB77E}.status-dot{width:17px;height:17px;border-radius:50%;display:grid;place-items:center;background:#F0F1F5;font-size:9px}.status.done .status-dot{background:#32C678;color:#fff}.topic-card.active .status{display:block}.topic-mini-progress{height:6px;background:#EDEFF4;border-radius:999px;overflow:hidden;margin-top:5px}.topic-mini-progress span{display:block;height:100%;width:60%;background:linear-gradient(90deg,#4AA8F4,#6A5EF0);border-radius:inherit}
.chapter-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}.chapter-card{position:relative;min-height:145px;background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;cursor:pointer;transition:.18s ease;display:grid;grid-template-columns:1.08fr .92fr}.chapter-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.chapter-card.active{border-color:#6C60ED;box-shadow:0 0 0 2px #EEEAFE}.chapter-copy{padding:15px 10px 13px 15px;z-index:2;display:flex;flex-direction:column;min-width:0}.chapter-kicker{font-size:9px;color:#6C65DD;font-weight:800}.chapter-card h3{font-size:13px;line-height:1.25;margin:4px 0 10px}.chapter-art{min-width:0;position:relative}.chapter-art img{width:100%;height:100%;object-fit:cover}.chapter-card .progress{margin-top:auto;max-width:118px}.chapter-count{font-size:8px;color:#85899A;margin-top:5px}.chapter-arrow{position:absolute;right:9px;top:9px;width:25px;height:25px;border-radius:50%;background:rgba(255,255,255,.88);display:grid;place-items:center;font-weight:800;color:#536074;z-index:2;box-shadow:0 4px 12px rgba(49,54,91,.09)}
.continue-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px}.continue-card{background:#fff;border:1px solid var(--line);border-radius:19px;padding:14px;display:grid;grid-template-columns:54px 1fr;gap:10px;align-items:center;min-height:94px}.continue-icon{width:54px;height:54px;border-radius:17px;overflow:hidden}.continue-icon img{width:100%;height:100%;object-fit:cover}.continue-card h3{font-size:11px;margin:0 0 3px}.continue-card p{font-size:9px;color:var(--muted);line-height:1.35;margin:0}.continue-card:nth-child(1){background:linear-gradient(145deg,#F1FFF7,#fff)}.continue-card:nth-child(2){background:linear-gradient(145deg,#F4F0FF,#fff)}.continue-card:nth-child(3){background:linear-gradient(145deg,#FFF8E6,#fff)}.continue-card:nth-child(4){background:linear-gradient(145deg,#FFF1F7,#fff)}
.bottom-strip{display:grid;grid-template-columns:1.15fr 1.15fr 1.5fr;gap:11px;margin-top:11px}.strip-card{min-height:105px;border-radius:21px;border:1px solid var(--line);background:#fff;overflow:hidden;display:flex;align-items:center;position:relative}.strip-card.explore{background:linear-gradient(135deg,#DFF8EA,#F4FFF9)}.strip-card.achievements{background:linear-gradient(135deg,#EEF0FF,#FBFAFF)}.strip-card.fact{background:linear-gradient(135deg,#FFF4CC,#F8FBFF)}.strip-copy{padding:14px 14px 14px 17px;z-index:2}.strip-copy h3{font-size:13px;margin:0 0 4px}.strip-copy p{font-size:9px;color:#696F82;margin:0;line-height:1.45}.strip-mascot{margin-left:auto;width:92px;height:94px;object-fit:cover;align-self:flex-end;mix-blend-mode:multiply}.badge-row{display:flex;gap:4px;margin-top:9px}.badge-row img{width:34px;height:34px;border-radius:12px}.fact-astronaut{font-size:48px;margin-left:auto;margin-right:20px;filter:drop-shadow(0 8px 14px rgba(60,63,86,.12))}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:15px;margin:4px 0 18px}.page-head h1{font-size:27px;letter-spacing:-.035em;margin:0 0 5px}.page-head p{font-size:12px;color:var(--muted);margin:0;max-width:620px}.page-head-visual{width:140px;height:90px;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-sm)}
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.module-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;cursor:pointer;transition:.18s ease}.module-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.module-cover{height:140px;position:relative;background:linear-gradient(145deg,#EEF2FF,#FFF6EA);overflow:hidden}.module-cover img{width:100%;height:100%;object-fit:cover}.module-lock{position:absolute;right:10px;top:10px;border-radius:999px;background:rgba(255,255,255,.9);padding:6px 9px;font-size:9px;font-weight:800;color:#666B7D}.module-body{padding:14px}.module-body .eyebrow{font-size:8px}.module-card h3{font-size:15px;margin:4px 0 5px}.module-card p{font-size:10px;color:var(--muted);line-height:1.45;margin:0 0 11px}.module-progress{display:flex;align-items:center;gap:8px}.module-progress small{font-size:8px;color:#838797;white-space:nowrap}
.topic-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:18px}.lesson-stack{display:grid;gap:13px}.lesson-hero{min-height:190px;border-radius:25px;overflow:hidden;background:linear-gradient(135deg,#F6F1FF,#EAF6FF);display:grid;grid-template-columns:1fr 260px;position:relative}.lesson-hero-copy{padding:25px}.lesson-hero h1{font-size:28px;line-height:1.1;margin:5px 0 8px;letter-spacing:-.035em}.lesson-hero p{font-size:12px;line-height:1.6;color:#606579;max-width:600px}.lesson-hero img{width:100%;height:100%;object-fit:cover;mix-blend-mode:multiply}.lesson-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 7px 23px rgba(44,47,77,.04)}.lesson-card h2{font-size:18px;margin:5px 0 8px}.lesson-card>p{font-size:12px;line-height:1.65;color:#555B70}.info-block{border-radius:17px;padding:14px;margin-top:13px}.info-block .tag{font-size:9px;font-weight:800;margin-bottom:4px}.info-block h3{font-size:13px;margin:0 0 5px}.info-block p{font-size:10px;line-height:1.55;margin:0;color:#5F6578}.info-block.fact{background:#FFF8D9}.info-block.everyday{background:#FFF1E7}.info-block.observe{background:#EAF7FF}.info-block.service{background:#F2EEFF}.choice-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:11px}.choice{border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;font-size:10px;font-weight:700;cursor:pointer}.choice:hover,.choice.selected{border-color:#7165EB;background:#F2EFFF;color:#5147BF}.experiment-box{border-radius:19px;background:linear-gradient(145deg,#F8FBFF,#EEF0FF);padding:14px}.controls{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:8px;align-items:end}.controls label{font-size:10px;font-weight:700}.controls input{width:100%;margin-top:7px}.experiment-stage{height:220px;margin-top:13px;border-radius:17px;background:linear-gradient(#CFEAFF,#EFF9FF 58%,#EDE1CA 59%,#F8EEDC);position:relative;overflow:hidden}.bottle{position:absolute;left:45px;bottom:34px;width:64px;height:92px;border-radius:10px 10px 22px 22px;background:linear-gradient(90deg,#6D5BEF,#9A89FF);box-shadow:inset 0 0 0 5px rgba(255,255,255,.24)}.bottle:before{content:"";position:absolute;left:14px;top:-26px;width:36px;height:31px;border-radius:6px 6px 3px 3px;background:#5458B5}.nose{position:absolute;right:52px;bottom:60px;font-size:55px}.particle{position:absolute;width:8px;height:8px;border-radius:50%;background:#735DEC;box-shadow:0 0 0 4px rgba(115,93,236,.11);animation:floatParticle linear forwards}@keyframes floatParticle{to{transform:translate(var(--dx),var(--dy));opacity:.25}}
.side-panel{position:sticky;top:94px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:17px;box-shadow:var(--shadow-sm)}.side-panel h3{font-size:15px;margin:0 0 12px}.stat-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px solid #F0F1F5;font-size:10px}.stat-row:last-of-type{border-bottom:0}.stat-row span{color:#666B7D}.stat-row b{font-size:10px}
.activity-grid,.home-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.activity-card,.home-exp{background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px;box-shadow:0 7px 24px rgba(43,46,74,.04)}.activity-thumb{height:130px;border-radius:17px;overflow:hidden;margin-bottom:12px;background:#EEF3FF}.activity-thumb img{width:100%;height:100%;object-fit:cover}.activity-card h3,.home-exp h3{font-size:14px;margin:0 0 5px}.activity-card p,.home-exp p{font-size:10px;line-height:1.5;color:var(--muted)}.activity-card .secondary,.activity-card .primary{padding:9px 12px;font-size:10px}.home-exp{position:relative;overflow:hidden}.home-exp .home-art{height:120px;margin:-16px -16px 12px;overflow:hidden}.home-exp .home-art img{width:100%;height:100%;object-fit:cover}.materials{font-size:9px;background:#F7F8FC;border-radius:11px;padding:9px;color:#64697C}.checklist{display:grid;gap:7px;margin-top:10px}.check{display:flex;gap:7px;align-items:flex-start;font-size:9px;color:#5D6275}.check i{width:19px;height:19px;border-radius:50%;background:#EEEAFE;display:grid;place-items:center;font-size:8px;font-style:normal;font-weight:800;color:#5D52D1;flex:0 0 auto}
.profile-hero{display:grid;grid-template-columns:300px minmax(0,1fr);gap:13px}.score-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.profile-mascot{height:170px;border-radius:19px;overflow:hidden;background:linear-gradient(145deg,#F2EFFF,#EAF8FF);margin-bottom:13px}.profile-mascot img{width:100%;height:100%;object-fit:cover}.ring{width:120px;height:120px;border-radius:50%;margin:14px auto;background:conic-gradient(#6254E8 0 29%,#ECEEF4 29%);display:grid;place-items:center;position:relative}.ring:after{content:"";width:92px;height:92px;border-radius:50%;background:#fff;position:absolute}.ring b{position:relative;z-index:2;font-size:22px}.badges-panel{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin-top:13px}.badge-card{border:1px solid var(--line);border-radius:16px;padding:10px;text-align:center;background:#fff}.badge-card img{width:58px;height:58px;border-radius:15px;margin:0 auto 5px}.badge-card b{display:block;font-size:9px}.badge-card small{font-size:8px;color:var(--muted)}
.empty-state{min-height:410px;display:grid;place-items:center;text-align:center}.empty-card{max-width:460px;background:#fff;border:1px solid var(--line);border-radius:26px;padding:26px;box-shadow:var(--shadow-sm)}.empty-card img{width:190px;height:150px;object-fit:cover;border-radius:23px;margin:0 auto 10px}.empty-card h2{font-size:21px;margin:0 0 7px}.empty-card p{font-size:11px;color:var(--muted);line-height:1.55;margin:0 0 14px}
.mobile-nav{display:none}.toast{position:fixed;left:50%;bottom:25px;transform:translate(-50%,20px);background:#25283A;color:white;border-radius:13px;padding:11px 14px;font-size:11px;font-weight:700;opacity:0;pointer-events:none;transition:.2s;z-index:200;box-shadow:var(--shadow)}.toast.show{opacity:1;transform:translate(-50%,0)}
@media (max-width:1180px){.app-shell{grid-template-columns:196px 1fr}.sidebar{padding-left:10px;padding-right:10px}.brand img{width:158px}.topic-grid{grid-template-columns:repeat(3,1fr)}.chapter-grid{grid-template-columns:repeat(2,1fr)}.continue-grid{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr 430px}.bottom-strip{grid-template-columns:1fr 1fr}.strip-card.fact{grid-column:1/-1}.course-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:900px){.app-shell{display:block}.sidebar{display:none}.topbar{height:66px;padding:0 14px}.mobile-brand{display:grid;width:42px;height:42px;border:0;background:transparent;padding:0;border-radius:13px;overflow:hidden}.mobile-brand img{width:100%;height:100%;object-fit:cover}.profile-copy,.profile-chip .chevron{display:none}.profile-chip{padding:0}.view{padding:15px 14px 90px}.hero{grid-template-columns:1fr;min-height:0}.hero-copy{padding:24px}.hero h1{font-size:28px}.hero-art{min-height:240px;order:-1}.current-card{grid-template-columns:1fr}.current-side{display:grid;grid-template-columns:1fr auto;align-items:center}.current-side .primary{width:auto}.topic-grid{grid-template-columns:repeat(3,1fr)}.chapter-grid{grid-template-columns:repeat(2,1fr)}.bottom-strip{grid-template-columns:1fr}.strip-card.fact{grid-column:auto}.topic-layout{grid-template-columns:1fr}.side-panel{position:static;order:-1}.activity-grid,.home-grid{grid-template-columns:repeat(2,1fr)}.profile-hero{grid-template-columns:1fr}.mobile-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:10px;right:10px;bottom:10px;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:19px;padding:6px;z-index:100;box-shadow:0 15px 45px rgba(41,44,73,.18)}.mobile-nav button{border:0;background:transparent;border-radius:13px;padding:5px 3px;color:#7E8294;display:grid;place-items:center;gap:2px;font-size:8px;font-weight:700}.mobile-nav button.active{background:#F0EEFF;color:#5147C9}.mobile-nav img{width:28px;height:28px;border-radius:9px}.course-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.search-wrap{max-width:none}.search-wrap input{font-size:10px;padding-right:10px}.icon-btn{display:none}.hero-art{min-height:205px}.hero-copy{padding:21px 20px 23px}.hero h1{font-size:25px}.hero p{font-size:12px}.hero-progress{display:none}.hero-actions .ghost{display:none}.current-main{grid-template-columns:72px 1fr}.topic-icon{width:72px;height:72px}.current-copy h3{font-size:16px}.topic-grid{grid-template-columns:repeat(2,1fr)}.topic-card{min-height:155px}.chapter-grid,.course-grid,.activity-grid,.home-grid{grid-template-columns:1fr}.continue-grid{grid-template-columns:1fr}.chapter-card{min-height:132px}.bottom-strip{gap:8px}.lesson-hero{grid-template-columns:1fr}.lesson-hero img{height:180px;order:-1}.controls{grid-template-columns:1fr 1fr}.controls label{grid-column:1/-1}.profile-hero{display:block}.score-card+ .score-card{margin-top:11px}.badges-panel{grid-template-columns:repeat(2,1fr)}}

/* v1.3.0 — complete chapter 1 */
button:disabled{opacity:.48;cursor:not-allowed;transform:none!important;box-shadow:none!important}
.chapter-summary{margin-top:14px;display:grid;grid-template-columns:auto minmax(120px,280px) auto;gap:10px;align-items:center;font-size:10px;color:var(--muted)}
.chapter-summary>b{font-size:18px;color:var(--primary)}
.lesson-map{display:grid;gap:11px}.lesson-map-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:12px;display:grid;grid-template-columns:106px minmax(0,1fr) 42px;gap:15px;align-items:center;cursor:pointer;transition:.18s ease}.lesson-map-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.lesson-map-card.locked{opacity:.58;cursor:not-allowed}.lesson-map-card.done{border-color:#CBEEDD;background:linear-gradient(90deg,#fff,#FAFFFC)}.lesson-map-card.active{border-color:#9C93F5;box-shadow:0 0 0 2px #F0EEFF}.lesson-map-art{height:82px;border-radius:15px;overflow:hidden;background:#F5F7FB}.lesson-map-art img{width:100%;height:100%;object-fit:cover}.lesson-map-copy>span{font-size:8px;text-transform:uppercase;letter-spacing:.08em;color:#7165E9;font-weight:800}.lesson-map-copy h3{font-size:15px;margin:3px 0 5px}.lesson-map-copy p{font-size:10px;line-height:1.5;color:var(--muted);margin:0 0 8px}.lesson-map-progress{display:flex;align-items:center;gap:8px}.lesson-map-progress b{font-size:9px;color:#5E6377}.lesson-map-status{width:34px;height:34px;border-radius:12px;background:#F1F2F7;display:grid;place-items:center;font-weight:900;color:#5D55D5}.lesson-map-card.done .lesson-map-status{background:#E3F8ED;color:#2AA86F}.final-test-card{margin-top:16px;background:linear-gradient(135deg,#F1EEFF,#E8F6FF);border:1px solid #DCD7FF;border-radius:23px;padding:20px;display:flex;align-items:center;justify-content:space-between;gap:18px}.final-test-card.locked{filter:saturate(.6)}.final-test-card h2{font-size:20px;margin:4px 0 5px}.final-test-card p{font-size:11px;color:var(--muted);margin:0;line-height:1.55}
.lesson-top-actions{display:flex;align-items:center;gap:8px;margin-top:12px;flex-wrap:wrap}.favorite-btn{border:1px solid #DEDDEA;background:#fff;border-radius:999px;padding:7px 10px;font-size:9px;font-weight:800;cursor:pointer}.favorite-btn.active{background:#FFF4C8;border-color:#F2D770;color:#8C6B00}.remember{margin:16px 0;background:linear-gradient(135deg,#EEF0FF,#F6F5FF);border-radius:16px;padding:13px 14px;display:grid;gap:3px}.remember b{font-size:10px;color:#5E53D2}.remember span{font-size:11px;line-height:1.55;color:#4E5368}.extra-blocks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.extra-blocks .info-block{margin:0}.observe-title{font-size:13px!important;margin:16px 0 0!important}.experiment-feedback{font-size:10px;color:var(--muted);margin-top:9px}.side-percent{text-align:right;font-size:12px;font-weight:900;color:var(--primary);margin-top:6px}.topic-finished{margin-top:12px;border-radius:13px;background:#E5F8EE;color:#25885C;font-size:10px;font-weight:800;padding:10px;text-align:center}.next-hint{margin-top:12px;border-radius:13px;background:#F5F4FF;color:#676C80;font-size:9px;line-height:1.45;padding:10px}.lesson-nav{display:flex;justify-content:space-between;gap:10px}.lesson-nav button{min-width:150px}.choice.correct{background:#E7F8EF;border-color:#8FD6B2;color:#267D55}.choice:disabled{opacity:.45}.quiz-question{border-top:1px solid #EFF0F5;padding:14px 0}.quiz-question:first-of-type{border-top:0}.quiz-question h3{font-size:12px;margin:0 0 8px}.quiz-options{display:grid;gap:7px}.quiz-options label{display:block;cursor:pointer}.quiz-options input{position:absolute;opacity:0;pointer-events:none}.quiz-options span{display:block;border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-size:10px;font-weight:650;background:#fff;transition:.15s}.quiz-options input:checked+span{border-color:#7A6EF0;background:#F2F0FF;color:#5045BD;box-shadow:0 0 0 2px rgba(98,84,232,.08)}.quiz-hint{min-height:18px;margin-top:6px;font-size:9px}.mini-ok{color:#279569;font-weight:800}.mini-warn{color:#A66F20;font-weight:700}
.sim-stage{height:250px;margin-top:13px;border-radius:18px;position:relative;overflow:hidden;background:linear-gradient(180deg,#DDF3FF,#F5FBFF);border:1px solid rgba(90,104,160,.08)}.sim-particle,.state-particle,.diffusion-particle{position:absolute;width:9px;height:9px;border-radius:50%;background:#6E5FEB;box-shadow:0 0 0 4px rgba(110,95,235,.10)}.sim-particle{animation:microFloat 1.9s ease-in-out infinite alternate}@keyframes microFloat{to{transform:translate(5px,-7px)}}
.compression-stage{background:linear-gradient(#EAF7FF,#FDFEFF)}.syringe{position:absolute;left:7%;right:7%;top:50%;height:105px;transform:translateY(-50%);border:4px solid #AAB2C8;border-radius:17px;background:#F8FBFF;overflow:visible}.syringe:after{content:"";position:absolute;right:-70px;top:42px;width:70px;height:15px;border:4px solid #AAB2C8;border-left:0;border-radius:0 8px 8px 0;background:#F8FBFF}.syringe-plunger{position:absolute;left:-22px;top:12px;width:28px;height:76px;border-radius:9px;background:#7A80A0}.gas-chamber{height:100%;position:absolute;right:0;top:0;background:linear-gradient(90deg,rgba(104,91,234,.08),rgba(91,183,232,.14));border-left:3px solid #7F86A3;overflow:hidden;transition:width .25s}.gas-chamber .sim-particle{background:#4E82EF}
.brownian-stage{--brownian-speed:1s;background:radial-gradient(circle at 30% 30%,#F6EEFF,#E6F7FF)}.brownian-big{position:absolute;left:50%;top:50%;width:38px;height:38px;margin:-19px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#FFD972,#E99128);box-shadow:0 8px 20px rgba(196,121,33,.25);z-index:4}.brownian-stage.running .brownian-big{animation:brownianJitter var(--brownian-speed) steps(2,end) infinite}@keyframes brownianJitter{0%{transform:translate(-9px,5px)}25%{transform:translate(8px,-8px)}50%{transform:translate(12px,7px)}75%{transform:translate(-5px,-10px)}100%{transform:translate(-9px,5px)}}.micro-particles{position:absolute;inset:0}.micro-particles .sim-particle{width:7px;height:7px;background:#67B8ED;animation-duration:var(--brownian-speed)}
.diffusion-stage{background:linear-gradient(#CFEAFF,#EFF9FF 58%,#EDE1CA 59%,#F8EEDC)}.diffusion-particle{left:80px;bottom:70px;animation:diffuse linear forwards}@keyframes diffuse{to{transform:translate(var(--dx),var(--dy));opacity:.25}}.bottle{position:absolute;left:45px;bottom:34px;width:64px;height:92px;border-radius:10px 10px 22px 22px;background:linear-gradient(90deg,#6D5BEF,#9A89FF);box-shadow:inset 0 0 0 5px rgba(255,255,255,.24)}.bottle:before{content:"";position:absolute;left:14px;top:-26px;width:36px;height:31px;border-radius:6px 6px 3px 3px;background:#5458B5}.nose{position:absolute;right:52px;bottom:60px;font-size:55px}
.attraction-stage{display:grid;place-items:center;background:radial-gradient(circle,#FDFDFF,#ECEBFF)}.atom-pair{--gap:50px;display:flex;align-items:center;justify-content:center;gap:var(--gap);transition:gap .25s}.atom{width:70px;height:70px;border-radius:50%;box-shadow:inset -12px -12px 22px rgba(26,39,113,.16),0 13px 26px rgba(72,78,138,.14)}.atom.a{background:radial-gradient(circle at 33% 28%,#93D3FF,#4E7BE8 58%,#3452B3)}.atom.b{background:radial-gradient(circle at 33% 28%,#FFA6A6,#EF5B6B 58%,#B53652)}.force-label{min-width:92px;text-align:center;font-size:10px;font-weight:900;border-radius:999px;padding:8px 10px;background:#EEF0FF;color:#5C54C7}.force-label.repel{background:#FFE7EA;color:#B53C55}.force-label.attract{background:#E5F7F0;color:#27855B}.force-label.weak{background:#F1F2F5;color:#818696}
.state-tabs{display:flex;gap:7px;margin-bottom:10px}.state-tab{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;font-size:10px;font-weight:800;cursor:pointer}.state-tab.active{background:#EEEAFE;border-color:#9D94F3;color:#554BBF}.states-stage{background:linear-gradient(#E9F8FF,#F9FDFF)}.state-particles{position:absolute;inset:0}.state-particle{transition:.35s;animation:stateMove 1.8s ease-in-out infinite alternate}.states-stage.solid .state-particle{background:#61AFE7;animation-duration:2.8s;animation-name:solidJiggle}@keyframes solidJiggle{to{transform:translate(2px,-2px)}}.states-stage.liquid .state-particle{background:#439DE3}.states-stage.gas .state-particle{background:#8A6BEB}.states-stage.gas .state-particle{animation-name:gasMove}@keyframes gasMove{to{transform:translate(20px,-13px)}}.state-caption{position:absolute;left:14px;bottom:12px;border-radius:999px;padding:7px 10px;background:rgba(255,255,255,.88);font-size:9px;font-weight:800;color:#535A70}.evaporating{position:absolute;bottom:45%;width:9px;height:9px;border-radius:50%;background:#4F9FDF;animation:evaporate 1.5s ease-out infinite}@keyframes evaporate{to{transform:translateY(-110px);opacity:0}}
.ice-stage{background:linear-gradient(#DFF4FF 0 52%,#5BB7E8 53%,#2F8AC7 100%)}.water{position:absolute;left:0;right:0;top:53%;bottom:0;background:linear-gradient(rgba(63,168,225,.4),rgba(29,126,185,.66))}.ice-cube{position:absolute;left:50%;top:76px;width:60px;height:60px;margin-left:-30px;border-radius:15px;background:linear-gradient(145deg,#F8FFFF,#AEE5FF 55%,#74C6F1);box-shadow:inset 0 0 0 3px rgba(255,255,255,.65),0 10px 20px rgba(25,96,142,.15);display:grid;place-items:center;font-size:24px;transition:.25s;z-index:2}.density-note{position:absolute;right:12px;bottom:12px;border-radius:999px;background:rgba(255,255,255,.88);padding:7px 9px;font-size:9px;font-weight:800;color:#316C93}
.home-exp.completed{border-color:#A8DFC1;background:linear-gradient(#fff,#FBFFFD)}.home-exp-head{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}.lab-status{font-size:8px;font-weight:800;border-radius:999px;background:#F1F2F6;color:#7D8292;padding:5px 7px;white-space:nowrap}.home-exp.completed .lab-status{background:#E2F7EB;color:#27865B}.lab-safety{font-size:9px;line-height:1.5;background:#FFF4DF;color:#765A28;border-radius:11px;padding:9px;margin-top:8px}.home-exp details{margin:10px 0}.home-exp summary{font-size:10px;font-weight:800;cursor:pointer;color:#5B52CB}.lab-detail{font-size:9px;line-height:1.55;color:#5E6376;padding-top:7px}.lab-detail h4{font-size:10px;margin:8px 0 2px;color:#32374A}.lab-detail p,.lab-detail ol{margin:3px 0 7px}.lab-detail ol{padding-left:18px}
.badge-card.earned{border-color:#D8D2FF;background:#FAF9FF}.final-quiz{max-width:900px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow-sm)}.final-q{padding:16px 0}.primary.large{width:100%;padding:14px;font-size:12px;margin-top:12px}.final-result{margin-top:16px;border-radius:20px;padding:15px;display:grid;grid-template-columns:120px 1fr;gap:15px;align-items:center}.final-result img{width:120px;height:100px;object-fit:cover;border-radius:17px}.final-result h2{font-size:18px;margin:0 0 5px}.final-result p{font-size:11px;line-height:1.55;color:#5E6375;margin:0}.final-result.great{background:#E8F8EF}.final-result.ok{background:#EEF4FF}.final-result.retry{background:#FFF2E6}
@media (max-width:900px){.lesson-map-card{grid-template-columns:85px minmax(0,1fr) 34px}.extra-blocks{grid-template-columns:1fr}.final-test-card{align-items:flex-start;flex-direction:column}.chapter-summary{grid-template-columns:auto 1fr}.chapter-summary span{grid-column:1/-1}.final-result{grid-template-columns:95px 1fr}.final-result img{width:95px;height:85px}}
@media (max-width:620px){.lesson-map-card{grid-template-columns:70px minmax(0,1fr) 30px;padding:9px;gap:9px}.lesson-map-art{height:68px}.lesson-map-copy p{display:none}.lesson-map-copy h3{font-size:12px}.lesson-nav{flex-direction:column}.lesson-nav button{width:100%}.sim-stage{height:220px}.atom{width:54px;height:54px}.final-quiz{padding:14px}.final-result{grid-template-columns:1fr;text-align:center}.final-result img{margin:auto}.chapter-summary{display:flex;flex-wrap:wrap}.chapter-summary .progress{min-width:120px;flex:1}}

/* v1.4.0 — Virtual Lab */
.full-lab-link{display:flex;align-items:center;gap:10px;justify-content:space-between;margin:10px 0 2px;padding:10px 12px;border-radius:14px;background:#F7F5FF;border:1px solid #E5E0FF}.full-lab-link small{font-size:9px;color:var(--muted)}
.lab-summary{display:grid;grid-template-columns:auto minmax(160px,280px) auto;align-items:center;gap:10px;margin-top:14px}.lab-summary>b{font-size:17px}.lab-summary>span{font-size:10px;color:var(--muted)}
.lab-rules{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:16px 0 18px}.lab-rules>div{background:#fff;border:1px solid var(--line);border-radius:17px;padding:13px;display:grid;gap:4px;box-shadow:0 6px 18px rgba(44,47,77,.035)}.lab-rules b{font-size:11px;color:#454A62}.lab-rules span{font-size:9px;color:var(--muted);line-height:1.45}.lab-grid .lab-card{position:relative}.lab-card.completed{border-color:#A9DEC1;background:linear-gradient(#fff,#FBFFFD)}.lab-card-status{position:absolute;right:10px;top:10px;z-index:2;border-radius:999px;background:rgba(255,255,255,.92);padding:5px 7px;font-size:8px;font-weight:800;color:#62677A;box-shadow:0 3px 10px rgba(42,46,74,.08)}.lab-card.completed .lab-card-status{background:#E2F7EB;color:#25875B}.lab-card-footer{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;padding-top:9px}.lab-card-footer>span{font-size:9px;color:var(--muted)}.lab-card-footer .primary{padding:9px 11px;font-size:9px}
.lab-page{max-width:1180px;margin:0 auto}.back-link{border:0;background:transparent;color:#5260C8;font-size:10px;font-weight:800;cursor:pointer;padding:0 0 12px}.lab-hero{min-height:190px;border-radius:25px;padding:24px 28px;background:linear-gradient(135deg,#F1F0FF,#E6F6FF 58%,#FFF6E4);border:1px solid #E7E5F5;display:grid;grid-template-columns:minmax(0,1fr) 220px;align-items:center;overflow:hidden;box-shadow:var(--shadow-sm)}.lab-hero h1{font-size:29px;line-height:1.08;margin:5px 0 8px;letter-spacing:-.035em}.lab-hero p{font-size:12px;line-height:1.6;color:#5D6277;max-width:650px}.lab-hero>img{height:170px;width:220px;object-fit:cover;object-position:center;border-radius:20px;mix-blend-mode:multiply}.lab-step-pills{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}.lab-step-pills span{border-radius:999px;background:rgba(255,255,255,.8);border:1px solid #E0E2ED;padding:6px 9px;font-size:8px;font-weight:800;color:#878B9A}.lab-step-pills span.done{background:#E2F7EB;border-color:#B9E5CE;color:#287F59}
.lab-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:18px;margin-top:18px}.lab-main{display:grid;gap:14px}.lab-prediction .prediction-saved{margin-top:10px;background:#F3F1FF;border-radius:12px;padding:9px 11px;font-size:9px;color:#5B51C7;font-weight:700}.lab-workbench{padding:17px}.lab-workbench-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.lab-workbench-head h2{margin:3px 0}.conditional-model{border-radius:999px;background:#F0F1F6;color:#7A7F90;padding:6px 8px;font-size:8px;font-weight:800;white-space:nowrap}.lab-controls{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:end;margin-top:11px}.lab-control{display:grid;gap:6px}.lab-control>span{font-size:9px;color:#62677B;font-weight:800}.lab-range-line{display:grid;grid-template-columns:minmax(0,1fr) 72px;gap:9px;align-items:center}.lab-range-line input{width:100%;accent-color:var(--primary)}.lab-range-line b{text-align:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:7px 8px;font-size:10px}.lab-buttons{display:flex;gap:7px;flex-wrap:wrap}.lab-buttons button{padding:10px 12px;font-size:9px}.lab-stage{height:330px;margin-top:13px;border-radius:20px;position:relative;overflow:hidden;border:1px solid rgba(84,91,137,.08);background:linear-gradient(#EAF6FF,#FAFCFF)}.lab-stage.paused *{animation-play-state:paused!important}.stage-caption{position:absolute;left:14px;bottom:12px;z-index:9;border-radius:999px;background:rgba(255,255,255,.9);padding:7px 10px;font-size:9px;font-weight:800;color:#536079;box-shadow:0 5px 16px rgba(36,47,78,.08)}
.lab-live-metrics{display:grid;grid-template-columns:170px 170px minmax(0,1fr);gap:8px;margin-top:10px}.lab-live-metrics>div,.lab-live-metrics>p{margin:0;border-radius:13px;background:#F8F9FC;padding:10px}.lab-live-metrics span{display:block;font-size:8px;color:#8A8E9D}.lab-live-metrics b{display:block;font-size:11px;margin-top:2px}.lab-live-metrics p{font-size:9px;line-height:1.45;color:#61667A}
.lab-compression{background:linear-gradient(180deg,#E8F6FF,#F9FCFF)}.lab-syringe{position:absolute;left:7%;right:7%;top:50%;height:125px;transform:translateY(-50%);border:5px solid #AAB4C9;border-radius:20px;background:#fff;box-shadow:0 15px 30px rgba(70,88,125,.09)}.lab-syringe:after{content:"";position:absolute;right:-82px;top:51px;width:82px;height:18px;border:5px solid #AAB4C9;border-left:0;border-radius:0 10px 10px 0;background:#fff}.lab-plunger{position:absolute;left:10%;top:-16px;width:24px;height:148px;background:#717B9D;border-radius:9px;transition:left .25s;z-index:4}.lab-gas{position:absolute;right:0;top:0;height:100%;width:72%;overflow:hidden;background:linear-gradient(90deg,rgba(92,116,236,.05),rgba(91,183,232,.18));border-left:3px solid #7D87A5;transition:width .25s}.lab-dot,.lab-micro-dot,.lab-water-dot,.lab-state-dot{position:absolute;width:9px;height:9px;border-radius:50%;background:#517FF0;box-shadow:0 0 0 4px rgba(81,127,240,.10);animation:labFloat 1.5s ease-in-out infinite alternate}@keyframes labFloat{to{transform:translate(6px,-8px)}}
.lab-diffusion-gas{background:linear-gradient(#D8EEFF,#F3FAFF 64%,#F4EBDC 65%,#FAF4E9)}.lab-bottle{position:absolute;left:10%;bottom:45px;width:70px;height:110px;border-radius:12px 12px 24px 24px;background:linear-gradient(90deg,#6B59E7,#9B8BFF);box-shadow:inset 0 0 0 6px rgba(255,255,255,.22),0 10px 20px rgba(68,67,144,.16)}.lab-bottle:before{content:"";position:absolute;left:16px;top:-30px;width:38px;height:34px;border-radius:7px 7px 4px 4px;background:#52589F}.lab-room-target{position:absolute;right:10%;bottom:80px;font-size:64px}.lab-particle-layer{position:absolute;inset:0}.lab-scent{position:absolute;width:9px;height:9px;border-radius:50%;background:#785DEB;box-shadow:0 0 0 5px rgba(120,93,235,.09)}.lab-scent.running{animation:labDiffuse linear forwards}@keyframes labDiffuse{to{transform:translate(var(--lab-dx),var(--lab-dy));opacity:.18}}.lab-distance-line{position:absolute;left:10%;right:10%;bottom:15px;display:flex;justify-content:space-between;font-size:8px;color:#7F8391;border-top:1px dashed rgba(96,101,130,.25);padding-top:5px}
.lab-diffusion-liquid{background:linear-gradient(#EDF9FF,#F8FCFF)}.lab-beaker{position:absolute;left:50%;top:48%;transform:translate(-50%,-50%);width:250px;height:220px;border:5px solid #A6C3D6;border-top:0;border-radius:0 0 30px 30px;background:rgba(255,255,255,.4);overflow:hidden}.lab-beaker:before{content:"";position:absolute;left:-8px;right:-8px;top:-3px;height:8px;border-radius:999px;background:#A6C3D6}.lab-water{position:absolute;left:0;right:0;bottom:0;height:80%;background:linear-gradient(rgba(151,221,248,.55),rgba(68,171,221,.45));overflow:hidden}.lab-dye{position:absolute;left:50%;top:20%;transform:translateX(-50%);width:26%;height:30%;border-radius:50%;background:radial-gradient(circle,#7E55E9 0,#9C72F0 35%,rgba(127,85,233,.12) 70%,transparent 72%);filter:blur(12px);transition:width 1s ease,height 1s ease,filter 1s ease}.lab-dye.spread{animation:dyePulse 1.2s ease both}@keyframes dyePulse{0%{transform:translateX(-50%) scale(.55);opacity:.85}100%{transform:translateX(-50%) scale(1);opacity:.65}}
.lab-brownian{--lab-speed:1s;background:radial-gradient(circle at 30% 20%,#F7EEFF,#E8F7FF)}.lab-micro-dot{width:6px;height:6px;background:#6EB9E9;box-shadow:none;animation-duration:var(--lab-speed)}.lab-brownian-big{position:absolute;left:50%;top:50%;width:44px;height:44px;margin:-22px;border-radius:50%;background:radial-gradient(circle at 35% 28%,#FFE078,#E58B28 65%,#B7641B);z-index:4;box-shadow:0 9px 20px rgba(181,105,25,.26)}.lab-brownian.running .lab-brownian-big{animation:labBrownian var(--lab-speed) steps(2,end) infinite}@keyframes labBrownian{0%{transform:translate(-8px,6px)}25%{transform:translate(10px,-10px)}50%{transform:translate(14px,7px)}75%{transform:translate(-6px,-12px)}100%{transform:translate(-8px,6px)}}.lab-trace{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none}.lab-trace polyline{fill:none;stroke:rgba(230,144,38,.6);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:4 5}
.lab-attraction{display:grid;place-items:center;background:radial-gradient(circle,#FFFFFF,#EFEEFF)}.lab-atom-pair{--lab-gap:100px;display:flex;align-items:center;gap:var(--lab-gap);transition:gap .25s}.lab-atom{width:78px;height:78px;border-radius:50%;box-shadow:inset -14px -14px 25px rgba(27,38,111,.16),0 14px 28px rgba(71,77,139,.15)}.lab-atom.left{background:radial-gradient(circle at 33% 28%,#A2DCFF,#4E83EC 58%,#3153B4)}.lab-atom.right{background:radial-gradient(circle at 33% 28%,#FFB2B2,#F05C6A 58%,#B43A52)}.lab-force{min-width:120px;text-align:center;border-radius:999px;padding:9px 12px;background:#E6F7EF;color:#287F59;font-size:10px;font-weight:900}.lab-force[data-mode="repel"]{background:#FFE8EB;color:#B23D56}.lab-force[data-mode="weak"]{background:#F1F2F5;color:#858A98}.force-scale{position:absolute;left:10%;right:10%;bottom:18px;display:flex;justify-content:space-between;font-size:7px;color:#8A8E9D;border-top:1px solid #E2E3EA;padding-top:6px}
.lab-states{background:linear-gradient(#ECF8FF,#F9FCFF)}.state-vessel{position:absolute;left:8%;right:38%;top:10%;bottom:10%;border:3px solid #C5D8E5;border-radius:22px;background:rgba(255,255,255,.55);overflow:hidden}.lab-state-dot{transition:.3s}.lab-state-dot.solid{background:#5EB1E8;animation-name:solidJiggle;animation-duration:2.5s}.lab-state-dot.liquid{background:#429EE0;animation-name:labFloat}.lab-state-dot.gas{background:#8969E8;animation-name:labGasMove}@keyframes labGasMove{to{transform:translate(26px,-17px)}}.state-readout{position:absolute;right:7%;top:50%;transform:translateY(-50%);width:25%;border-radius:18px;background:#fff;padding:16px;box-shadow:var(--shadow-sm);display:grid;gap:6px}.state-readout b{font-size:18px}.state-readout span{font-size:9px;color:var(--muted);line-height:1.45}
.lab-evaporation{background:linear-gradient(#E5F5FF 0 58%,#F7FBFF 59%)}.evap-vessel{position:absolute;left:20%;right:20%;bottom:18px;height:165px;border:4px solid #A7C5D8;border-top:0;border-radius:0 0 28px 28px;overflow:hidden;background:rgba(255,255,255,.4)}.evap-water{position:absolute;left:0;right:0;bottom:0;height:70%;background:linear-gradient(rgba(134,214,246,.55),rgba(67,165,218,.58));overflow:hidden}.lab-water-dot{background:#4D9FDE;box-shadow:0 0 0 3px rgba(77,159,222,.08)}.evap-air{position:absolute;left:20%;right:20%;top:15px;height:170px}.lab-evap-dot{position:absolute;bottom:0;width:9px;height:9px;border-radius:50%;background:#4B9DDB;animation:labEvaporate 1.5s ease-out forwards}@keyframes labEvaporate{to{transform:translateY(-150px) translateX(12px);opacity:0}}
.run-history{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:12px}.run-card{border:1px solid var(--line);border-radius:14px;padding:11px;background:#FBFCFF;display:grid;gap:3px}.run-card span{font-size:8px;color:#777C90;font-weight:800;text-transform:uppercase}.run-card b{font-size:11px}.run-card small{font-size:8px;color:var(--muted);line-height:1.4}.run-empty{grid-column:1/-1;border:1px dashed #D9DCE7;border-radius:14px;padding:16px;text-align:center;font-size:9px;color:#8A8E9E}.compare-lock{margin-top:12px;border-radius:13px;background:#F3F4F8;padding:10px;font-size:9px;color:#787D8F}.lab-conclusion{margin-top:13px;border-radius:18px;background:linear-gradient(135deg,#E3F8EC,#F5FFF9);padding:14px;display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px}.conclusion-icon{width:34px;height:34px;border-radius:50%;background:#48B982;color:#fff;display:grid;place-items:center;font-weight:900}.lab-conclusion b{font-size:11px}.lab-conclusion p{font-size:9px;color:#586173;line-height:1.5;margin:4px 0 6px}.lab-conclusion strong{font-size:9px;color:#267F59}.lab-side{position:sticky;top:92px}.lab-remember{margin:13px 0;border-radius:14px;background:#F2F0FF;padding:11px}.lab-remember b{font-size:9px;color:#5B52C9}.lab-remember p{font-size:9px;color:#606578;line-height:1.5;margin:4px 0 0}
@media(max-width:1050px){.lab-rules{grid-template-columns:repeat(2,1fr)}.lab-layout{grid-template-columns:1fr}.lab-side{position:static}.lab-live-metrics{grid-template-columns:repeat(2,1fr)}.lab-live-metrics p{grid-column:1/-1}}
@media(max-width:720px){.lab-summary{grid-template-columns:auto 1fr}.lab-summary>span{grid-column:1/-1}.lab-rules{grid-template-columns:1fr}.lab-hero{grid-template-columns:1fr;min-height:0;padding:20px}.lab-hero>img{display:none}.lab-layout{gap:12px}.lab-controls{grid-template-columns:1fr}.lab-buttons{display:grid;grid-template-columns:1fr 1fr 1fr}.lab-buttons button{padding:10px 6px}.lab-stage{height:270px}.lab-live-metrics{grid-template-columns:1fr}.lab-live-metrics p{grid-column:auto}.run-history{grid-template-columns:1fr}.state-vessel{right:8%;bottom:34%;}.state-readout{left:8%;right:8%;top:auto;bottom:6%;width:auto;transform:none;display:flex;align-items:center;justify-content:space-between}.lab-atom{width:58px;height:58px}.lab-atom-pair{transform:scale(.9)}}