:root{--bg:#090e21;--side:#0d142b;--surface:#121b36;--raised:#1a2545;--edge:rgba(185,201,253,.13);--ink:#f7f8ff;--muted:#a9b5d4;--violet:#9583ff;--mint:#62eac6;--gold:#ffca79;--pink:#fd8aa7;--shadow:0 20px 60px rgba(1,5,22,.27)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Tahoma,'Segoe UI',Arial,sans-serif;line-height:1.75;min-height:100vh}button,input,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.48;cursor:not-allowed}a{color:inherit;text-decoration:none}svg{display:block}::selection{background:#a794ff;color:#0b1025}
body:before{content:"";position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 75% -16%,rgba(106,87,245,.16),transparent 36%),radial-gradient(ellipse at 12% 95%,rgba(26,199,177,.07),transparent 32%);z-index:-1}
#app{min-height:100vh}#sidebar{width:258px;position:fixed;right:0;top:0;bottom:0;background:linear-gradient(180deg,#111936,#0b1227);border-left:1px solid var(--edge);padding:22px 14px;display:flex;flex-direction:column;z-index:20;overflow:auto}#main{margin-right:258px;min-height:100vh}.brand{padding:5px 9px 25px;display:flex;align-items:center;gap:11px}.brand-logo{width:49px;height:49px;background:linear-gradient(145deg,#a49bff,#6b56ed);border-radius:16px;display:grid;place-items:center;color:white;font-size:25px;font-weight:900;transform:rotate(-8deg);box-shadow:0 10px 32px #7262eb55}.brand span{font-size:11px;color:var(--muted);display:block;line-height:1.3}.brand strong{font-size:19px;letter-spacing:1.7px;line-height:1.4}.nav-cap{font-size:11px;padding:0 14px;color:#7c8bab;font-weight:800;letter-spacing:1.2px;margin:2px 0 10px}.nav-list{display:grid;gap:4px}.nav-btn{width:100%;padding:12px 15px;border:1px solid transparent;background:transparent;color:var(--muted);display:flex;align-items:center;gap:13px;border-radius:14px;font-weight:700;text-align:right;transition:.2s}.nav-btn:hover{background:#ffffff0a;color:white}.nav-btn.active{background:linear-gradient(100deg,#5544b34a,#2a2d7350);border-color:#8179e74d;color:white;box-shadow:inset -3px 0 0 #ab9aff}.nav-icon{width:25px;text-align:center;font-size:20px}.aside-bottom{margin-top:auto;padding-top:24px}.profile-card{padding:15px;border-radius:17px;border:1px solid var(--edge);background:#ffffff07}.profile-avatar{width:37px;height:37px;display:grid;place-items:center;border-radius:12px;background:#6b59e3;margin-left:10px}.profile-row{display:flex;align-items:center}.profile-name{font-size:13px;font-weight:800}.small-muted{font-size:12px;color:var(--muted)}.progress{height:8px;background:#ffffff18;border-radius:99px;overflow:hidden}.progress>span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#68e8c2,#9d8afb);transition:width .4s}.aside-footer{font-size:10px;color:#7c88ab;padding:18px 10px 0;line-height:1.7}
.topbar{height:78px;padding:0 max(32px,4.3vw);display:flex;align-items:center;justify-content:space-between;gap:15px;border-bottom:1px solid var(--edge);background:#0c1327a3;backdrop-filter:blur(18px);position:sticky;top:0;z-index:10}.crumb{font-size:13px;color:var(--muted)}.crumb strong{color:var(--ink)}.top-controls{display:flex;align-items:center;gap:11px}.chip{border:1px solid var(--edge);background:var(--surface);border-radius:99px;display:flex;align-items:center;gap:8px;padding:8px 13px;font-size:13px;font-weight:800}.search{width:230px;background:#ffffff08;border:1px solid var(--edge);border-radius:12px;color:var(--ink);padding:9px 14px;outline:none}.search:focus,.field:focus,.control-select:focus{border-color:var(--violet);box-shadow:0 0 0 3px #9985ff25}.search::placeholder{color:#7182a5}#mobileMenu{display:none}.page{max-width:1540px;margin:0 auto;padding:32px max(28px,4.3vw) 62px}.eyebrow{font-size:12px;letter-spacing:1.4px;color:#b2a7ff;font-weight:900;text-transform:uppercase}.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:36px 0 19px}.section-head h2{margin:5px 0 0;font-size:25px;letter-spacing:-.5px}.section-head p{margin:0;color:var(--muted);font-size:13px}.display-title{font-size:clamp(29px,3.2vw,49px);font-weight:900;line-height:1.4;margin:12px 0 15px;letter-spacing:-1px}.subtitle{color:#c0c9e7;max-width:580px;font-size:15px}.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:44px;border-radius:12px;padding:10px 18px;border:1px solid var(--edge);background:#ffffff0c;color:var(--ink);font-weight:800;transition:transform .18s,background .2s}.btn:hover:not(:disabled){transform:translateY(-2px);background:#ffffff18}.btn-primary{background:linear-gradient(105deg,#a492ff,#776af3);border-color:transparent;color:#100d2b;box-shadow:0 9px 30px #7566f63b}.btn-primary:hover:not(:disabled){background:linear-gradient(105deg,#b5a8ff,#9288ff)}.btn-mint{background:#53e4bb;color:#06231c;border:0}.btn-outline{border-color:#9a8cf77a;color:#c9c0ff}.btn-small{min-height:36px;padding:7px 12px;font-size:12px}.btn-icon{width:42px;padding:8px;font-size:19px}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.right-between{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}.muted{color:var(--muted)}.tiny{font-size:12px}.label{font-size:11px;letter-spacing:.2px;font-weight:800;color:var(--muted)}.glass{border:1px solid var(--edge);border-radius:22px;background:linear-gradient(145deg,#182342d1,#131b34d9);box-shadow:var(--shadow)}.soft-panel{background:#ffffff06;border:1px solid var(--edge);border-radius:17px;padding:21px}.p20{padding:20px}.p26{padding:26px}.grad-text{background:linear-gradient(100deg,#b9acff,#67e8c5);color:transparent;background-clip:text}.hero{min-height:395px;display:grid;grid-template-columns:1.2fr .8fr;overflow:hidden;background:radial-gradient(ellipse at 76% 42%,#4c438a81,transparent 42%),linear-gradient(124deg,#282658,#1a2450 56%,#161d37);border:1px solid #5e568d77;border-radius:29px;position:relative;padding:43px;box-shadow:0 36px 95px #0003}.hero:after{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(#ffffff35 1px,transparent 1px);background-size:22px 22px;opacity:.2;mask-image:linear-gradient(to left,black,transparent 85%)}.hero-info{z-index:2;align-self:center}.hero h1{font-size:clamp(34px,3.7vw,60px);line-height:1.34;max-width:600px;margin:14px 0}.hero p{color:#d6d5f5;max-width:540px;margin:0 0 25px;font-size:15px}.hero-badge{background:#ffffff16;border:1px solid #ffffff32;border-radius:99px;display:inline-flex;align-items:center;padding:6px 15px;font-size:12px;gap:8px;color:#edebff}.hero-art{min-height:305px;position:relative;display:grid;place-items:center;perspective:750px}.math-orbit{width:272px;height:272px;border-radius:50%;border:2px dashed #a49bf961;position:absolute;box-shadow:0 0 65px #8677ff2b,inset 0 0 65px #6c60dd20;animation:spin 34s linear infinite}.math-orbit:after{content:"";width:16px;height:16px;border-radius:50%;position:absolute;background:#7ef2cb;top:24px;left:25px;box-shadow:0 0 25px #76ffd4}.orbit-sm{width:205px;height:205px;animation-duration:25s;animation-direction:reverse;transform:rotateX(65deg);border-color:#77d4d55d}.central-cube{width:170px;height:170px;border-radius:34px;display:flex;align-items:center;justify-content:center;font-size:89px;font-weight:900;color:white;background:linear-gradient(150deg,#c0adff,#7164dc 65%,#4c469a);transform:rotate(-12deg) rotateY(-10deg);box-shadow:19px 26px 0 #45448c,25px 40px 55px #0007,inset 0 3px 20px #fff6;text-shadow:0 6px 18px #1a186b7d;animation:float 5s ease-in-out infinite}.float-chip{position:absolute;background:#0f2044e0;border:1px solid #ffffff3c;backdrop-filter:blur(12px);border-radius:17px;padding:8px 15px;box-shadow:0 10px 35px #0005;font-size:23px;font-weight:800;animation:float 5s ease-in-out infinite}.float-chip.a{top:3%;right:3%;transform:rotate(8deg);color:var(--mint)}.float-chip.b{bottom:7%;left:4%;color:#ffcf79;animation-delay:-2s}.float-chip.c{top:12%;left:7%;color:#cfc0ff;animation-delay:-1s}@keyframes spin{to{transform:rotate(360deg)}}@keyframes float{50%{translate:0 -12px}}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:20px}.stat{padding:19px 20px;border-radius:19px;border:1px solid var(--edge);background:var(--surface);display:flex;align-items:center;gap:14px;min-width:0}.stat-icon{width:47px;height:47px;display:grid;place-items:center;border-radius:15px;font-size:21px;background:#ffffff0c}.stat strong{font-size:25px;display:block;line-height:1.4;font-family:'Segoe UI',Tahoma,sans-serif;font-variant-numeric:tabular-nums}.stat span{font-size:12px;color:var(--muted)}.world-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:17px}.world-card{padding:19px;position:relative;overflow:hidden;min-height:222px;transition:transform .23s,border-color .2s;display:flex;flex-direction:column}.world-card:hover{transform:translateY(-6px);border-color:var(--accent)}.world-card::before{content:"";width:130px;height:130px;border-radius:50%;background:var(--accent);opacity:.11;filter:blur(28px);position:absolute;top:-35px;left:-35px;pointer-events:none}.world-head{display:flex;justify-content:space-between;gap:10px;align-items:center}.world-icon{width:54px;height:54px;display:grid;place-items:center;border-radius:16px;background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);font-size:30px;font-weight:900}.world-card h3{font-size:17px;line-height:1.5;margin:18px 0 7px}.world-card p{font-size:12px;color:var(--muted);line-height:1.7;margin:0}.world-bottom{margin-top:auto;padding-top:16px}.world-bottom .tiny{color:#c9d3f1}.world-card .progress{height:6px;margin-top:10px}.world-card .arrow{font-size:22px;color:var(--accent)}.filters{display:flex;gap:9px;flex-wrap:wrap}.filter{border:1px solid var(--edge);background:#ffffff08;color:var(--muted);border-radius:99px;padding:7px 14px;font-size:12px;font-weight:800}.filter.active{background:#9885ff28;border-color:#9885ff9a;color:#e5deff}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.feature{padding:24px;position:relative;overflow:hidden;min-height:185px}.feature h3{margin:8px 0}.feature p{color:var(--muted);font-size:13px;margin:0 0 20px}.feature-art{position:absolute;left:20px;top:25px;font-size:70px;opacity:.16}
.page-cover{padding:28px 31px;border-radius:24px;background:linear-gradient(125deg,color-mix(in srgb,var(--accent) 24%,#101a35),#151e38 65%);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent)}.page-cover h1{font-size:clamp(24px,3vw,37px);line-height:1.4;margin:10px 0 5px}.breadcrumbs{font-size:12px;color:var(--muted);margin-bottom:18px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px;margin-top:23px;align-items:start}.lesson-main{min-width:0}.lesson-side{position:sticky;top:105px}.tab-bar{display:flex;gap:7px;background:#ffffff09;border:1px solid var(--edge);padding:6px;border-radius:14px;max-width:max-content;margin-bottom:17px}.tab{border:0;background:transparent;color:#aeb8dc;padding:10px 20px;border-radius:10px;font-size:13px;font-weight:800}.tab.active{background:#8171f2;color:#fff}.learn-block{margin-bottom:17px;padding:28px}.learn-block h3{font-size:20px;margin:0 0 14px}.concepts{display:grid;gap:12px;padding:0;margin:15px 0;list-style:none}.concepts li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:#dce3fa}.concepts li:before{content:'✓';display:grid;place-items:center;flex-shrink:0;width:23px;height:23px;border-radius:8px;background:#52d8b32a;color:#77e9c7;font-weight:900}.formula{padding:23px;border:1px dashed #948aff72;border-radius:17px;background:#7c70e917;font-size:clamp(16px,1.65vw,22px);font-weight:900;text-align:center;line-height:2.1;direction:rtl}.step-list{display:grid;gap:11px;counter-reset:step;padding:0;list-style:none}.step-list li{display:flex;align-items:flex-start;gap:11px;color:#dce4fc;line-height:1.8;font-size:14px}.step-list li:before{counter-increment:step;content:counter(step);height:27px;min-width:27px;border-radius:9px;background:#9686f333;color:#c7b9ff;display:grid;place-items:center;font-size:12px;font-weight:900}.mini-stat{padding:16px;border-radius:13px;background:#ffffff08;margin-bottom:12px}.side-links{display:grid;gap:6px;margin-top:13px}.side-links button{border:1px solid transparent;background:transparent;padding:10px;border-radius:10px;color:var(--muted);text-align:right;font-size:12px;display:flex;justify-content:space-between;gap:5px}.side-links button:hover{background:#ffffff10}.side-links button.active{background:#8d7ef329;color:#fff;border-color:#8d7ef348}.side-links button.done{color:#83e4c6}.quiz-card{padding:25px;min-height:480px}.quiz-title{font-size:22px;line-height:1.75;margin:20px 0 24px}.field{width:100%;max-width:330px;border-radius:12px;background:#0a1530;border:1px solid #ffffff30;padding:14px 16px;color:white;outline:none;font-size:20px;direction:ltr;text-align:center;font-variant-numeric:tabular-nums}.control-select{background:#101b35;color:var(--ink);padding:11px;border-radius:11px;border:1px solid var(--edge);outline:none;max-width:100%}.options{display:grid;gap:10px}.option{border:1px solid #ffffff22;padding:14px 17px;border-radius:12px;background:#ffffff07;color:var(--ink);text-align:right;font-size:14px;display:flex;align-items:center;gap:12px;transition:.2s}.option:hover{border-color:#9886ee}.option.selected{background:#8b7bfd28;border-color:#a395ff}.option span.index{width:28px;height:28px;flex-shrink:0;border-radius:8px;display:grid;place-items:center;background:#ffffff10;font-size:12px}.answer-box{border:1px solid #6ce4bc61;border-radius:15px;padding:17px 21px;background:#4cddb216;margin-top:21px;color:#dcfff2}.answer-box.bad{border-color:#ff93885c;background:#ff796016;color:#ffe9e2}.answer-box h4{margin:0 0 6px}.answer-box p{margin:5px 0}.answer-box ol{margin:8px 0;padding-right:19px}.hint-box{border-color:#ffc17b65;background:#ffc17b13;color:#ffe2bc}.question-counter{font-size:12px;color:var(--muted);font-weight:800}.question-meta{display:flex;gap:8px;flex-wrap:wrap}.mini-tag{border-radius:6px;border:1px solid var(--edge);background:#ffffff07;padding:3px 9px;font-size:11px;color:#bfcbe4}.question-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.quiz-nav{display:flex;justify-content:space-between;gap:10px;margin-top:25px;padding-top:20px;border-top:1px solid var(--edge)}.dots{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:6px;margin-top:14px}.dot{border:0;border-radius:6px;height:8px;background:#ffffff1f;padding:0}.dot.active{background:#b5a3ff}.dot.done{background:#65e4c1}
.lab-tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:11px;margin:24px 0}.lab-tab{border:1px solid var(--edge);background:var(--surface);color:var(--muted);padding:15px 7px;border-radius:17px;font-weight:800;font-size:12px}.lab-tab>span{display:block;font-size:25px;margin-bottom:5px}.lab-tab.active{border-color:#a392fc;color:white;background:#9682ff2c}.lab-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);gap:19px;align-items:stretch}.lab-pane{padding:30px;min-width:0}.lab-pane h3{font-size:23px;margin:0 0 7px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0}.form-label{display:grid;gap:6px;font-size:13px;color:var(--muted)}.form-label input,.form-label select{width:100%;background:#10182f;color:var(--ink);border:1px solid #ffffff2b;border-radius:12px;padding:12px;outline:none;min-width:0}.big-result{margin:24px 0;border-radius:20px;background:linear-gradient(135deg,#8073ee2b,#58dab81b);border:1px solid #9d91ff5a;padding:26px;text-align:center}.big-result strong{font-size:clamp(27px,3.4vw,48px);display:block;color:#a9f9dc;font-variant-numeric:tabular-nums;direction:ltr}.big-result span{font-size:12px;color:var(--muted)}.svg-stage{background:radial-gradient(#9db0db17 1px,transparent 1px),linear-gradient(145deg,#0e1b34,#111a2f);background-size:22px 22px,100%;border:1px solid var(--edge);border-radius:19px;display:grid;place-items:center;min-height:285px;margin:18px 0;overflow:hidden}.svg-stage svg{width:100%;max-width:460px;height:auto}.range{width:100%;accent-color:#ac9dff;cursor:pointer}.lab-info{padding:20px;border-radius:15px;background:#56e0b614;border:1px solid #56e0b63b;margin-top:18px;font-size:14px;color:#d7fff3}.lab-helps{color:#c1cbe7;font-size:13px;line-height:2}.angle-presets{display:flex;flex-wrap:wrap;gap:8px}.angle-presets button{background:#ffffff10;color:white;border:1px solid #ffffff25;padding:7px 12px;border-radius:8px}.angle-presets button.active{background:#8577e3}.progress-circle{--percent:0;display:grid;place-items:center;width:118px;height:118px;border-radius:50%;background:conic-gradient(#6ceac4 calc(var(--percent)*1%),#ffffff10 0);position:relative}.progress-circle:before{content:"";position:absolute;inset:11px;border-radius:50%;background:var(--surface)}.progress-circle strong{z-index:1;font-size:27px}.achievement-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.achievement{padding:24px;text-align:center}.medal{font-size:47px;filter:grayscale(1);opacity:.4}.achievement.unlocked .medal{filter:none;opacity:1}.achievement h3{margin:9px 0 4px}.achievement p{font-size:12px;color:var(--muted);margin:0}.certificate{background:#fffef8;color:#272440;border:11px double #c2ab72;padding:34px;position:relative;text-align:center;max-width:760px;margin:22px auto;border-radius:5px}.certificate h2{font-size:35px;margin:12px}.certificate p{font-size:17px}.certificate .signature{display:flex;justify-content:space-between;margin-top:28px;border-top:1px solid #cfbd89;padding-top:16px;font-weight:800}.arena-start{padding:45px;text-align:center;max-width:750px;margin:24px auto}.arena-logo{font-size:86px;margin-bottom:9px;filter:drop-shadow(0 0 30px #ffd68460)}.arena-meter{height:11px;background:#ffffff16;border-radius:20px;overflow:hidden;margin:20px 0}.arena-meter span{display:block;background:linear-gradient(90deg,#65e9c4,#9289ff);height:100%}.arena-score{display:flex;justify-content:space-between;gap:15px}.flashcard{width:min(100%,680px);min-height:300px;margin:22px auto;border:1px solid #a89aff6d;border-radius:26px;background:linear-gradient(145deg,#342f73,#202750);padding:32px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;box-shadow:0 30px 85px #070a23a0;transition:transform .35s;cursor:pointer}.flashcard:hover{transform:translateY(-4px)}.flashcard h2{font-size:25px;max-width:520px;line-height:2}.flashcard .flip-hint{font-size:12px;color:#d1cffa}.challenge-result{padding:29px;text-align:center}.toast{position:fixed;left:28px;bottom:27px;z-index:99;max-width:min(400px,calc(100vw - 40px));padding:15px 22px;border:1px solid #7bf0c55b;border-radius:16px;background:#163e38;color:#d6fff2;box-shadow:0 18px 50px #0009;transform:translateY(130px);opacity:0;transition:.35s}.toast.show{transform:translateY(0);opacity:1}.confetti{position:fixed;z-index:90;pointer-events:none;font-size:23px;animation:pop .9s ease-out forwards}@keyframes pop{from{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-120px) rotate(100deg) scale(.5)}}#mobileShade{display:none}.empty{text-align:center;padding:80px 15px;color:var(--muted)}.empty strong{font-size:45px;display:block}.divider{height:1px;background:var(--edge);margin:18px 0}.callout{padding:17px;background:#ffcc7630;border:1px solid #ffcf7271;border-radius:14px;color:#ffe3b4;font-size:13px}.mini-help{font-size:11px;color:#96a5c6}.footer{text-align:center;margin:50px 0 10px;color:#687b9a;font-size:12px}.hide{display:none!important}
.light{--bg:#f5f7fd;--side:#fff;--surface:#fff;--raised:#f4f5fc;--edge:rgba(22,40,87,.12);--ink:#1f2d50;--muted:#647293;--shadow:0 12px 35px #24366412}.light body,.light #app{color:var(--ink)}.light #sidebar{background:#fff}.light .topbar{background:#fffffff0}.light .glass{background:#fff}.light .hero{color:white}.light .chip{background:white}.light .search{background:#fff;color:var(--ink)}.light .nav-btn.active{color:#383477}.light .nav-btn:hover{color:#201d5a}.light .field,.light .control-select,.light .form-label input,.light .form-label select{color:var(--ink);background:#f4f6fc}.light .option{color:var(--ink)}.light .formula{color:#39337a}.light .step-list li,.light .concepts li{color:var(--ink)}.light .lesson-side{color:var(--ink)}.light .lab-helps,.light .mini-tag{color:var(--ink)}.light .world-bottom .tiny{color:#52617e}.light .svg-stage{background-color:#e7edfa}.light .learn-block,.light .stat{background:#fff}.light .btn{color:var(--ink)}.light .btn-primary{color:white}.light .btn-mint{color:#072b21}.light .arena-start{color:var(--ink)}
@media(max-width:1340px){.world-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.topbar{padding:0 30px}.page{padding:30px}.hero{padding:31px}}
@media(max-width:1080px){#sidebar{width:220px}#main{margin-right:220px}.world-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:minmax(0,1fr) 220px}.hero{grid-template-columns:1.2fr .8fr}.hero-art{scale:.8}.stats{grid-template-columns:repeat(2,1fr)}.lab-tabs{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){#sidebar{transform:translateX(110%);transition:.25s;width:min(288px,84vw);box-shadow:-15px 0 60px #0007}.menu-open #sidebar{transform:translateX(0)}#mobileShade{display:none;position:fixed;inset:0;background:#030617ba;z-index:19}.menu-open #mobileShade{display:block}#mobileMenu{display:inline-flex}#main{margin-right:0}.topbar{height:69px;padding:0 17px}.search{display:none}.page{padding:22px 16px 40px}.hero{grid-template-columns:1fr;padding:28px 25px;min-height:0;border-radius:21px}.hero h1{font-size:34px}.hero-art{min-height:220px;scale:.76;margin:-15px -40px -30px}.stats{gap:10px}.stat{padding:13px;gap:8px}.stat-icon{width:35px;height:35px;font-size:18px}.stat strong{font-size:20px}.stat span{font-size:11px}.world-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.world-card{padding:14px;min-height:215px}.world-card h3{font-size:14px}.world-card p{font-size:11px}.world-icon{width:41px;height:41px;font-size:24px}.world-head .label{font-size:9px}.feature-grid,.lab-grid,.lesson-layout{grid-template-columns:1fr}.lesson-side{position:static;order:-1}.lesson-side .side-links{grid-template-columns:repeat(5,1fr)}.side-links button{padding:7px;font-size:10px;text-align:center;justify-content:center}.side-links button span{display:none}.page-cover{padding:22px}.lab-tabs{grid-template-columns:repeat(5,1fr);gap:5px}.lab-tab{font-size:10px;padding:8px 2px}.lab-tab>span{font-size:19px}.lab-pane{padding:18px}.quiz-card{padding:18px}.learn-block{padding:19px}.achievement-grid{grid-template-columns:repeat(2,1fr)}.certificate{padding:15px}.certificate h2{font-size:24px}.top-controls{gap:6px}.chip{padding:7px 9px;font-size:11px}.top-controls .chip:nth-child(2){display:none}.section-head h2{font-size:20px}.form-grid{gap:10px}.btn{font-size:12px;padding:9px 12px}.float-chip{font-size:22px}.hero p{font-size:13px}}
@media(max-width:395px){.world-grid{grid-template-columns:1fr}.world-card{min-height:190px}.stats{grid-template-columns:1fr 1fr}.lab-tab{font-size:9px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
@media print{body{background:white!important;color:black!important}#sidebar,.topbar,.no-print,.footer,#mobileShade{display:none!important}#main{margin:0}.page{padding:0}.certificate{display:block!important;box-shadow:none!important;max-width:none!important}.cert-only~*{display:none!important}.page:has(.certificate)>:not(.certificate){display:none!important}.certificate .signature{color:black}}

/* Gated app panels */
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at 50% 20%,#353070aa,#090e21 70%)}.auth-panel{width:min(100%,510px);padding:33px}.auth-panel h1{font-size:28px;line-height:1.5;margin:12px 0}.auth-panel .brand{padding:0}.stack{display:grid;gap:14px}.form-input{display:block;width:100%;padding:12px 15px;background:#ffffff09;border:1px solid #ffffff30;color:#fff;border-radius:12px;outline:none;min-height:46px}.form-input:focus{border-color:#a293ff;box-shadow:0 0 0 3px #a293ff22}.form-input option{color:#131b35;background:#fff}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.app-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:22px max(24px,5vw);border-bottom:1px solid var(--edge);background:#131c38}.app-head strong{font-size:20px}.container{width:min(1160px,100%);margin:auto;padding:26px 18px 75px}.teacher-tabs{display:flex;flex-wrap:wrap;gap:9px;margin:22px 0}.teach-tab{background:#ffffff12;border:1px solid #ffffff22;padding:10px 16px;border-radius:12px;color:white}.teach-tab.active{background:#8574f5;color:#100b2b;font-weight:900}.table-wrap{overflow:auto;border-radius:19px;border:1px solid var(--edge)}.data-table{border-collapse:collapse;width:100%;min-width:760px}.data-table th,.data-table td{text-align:right;padding:13px 12px;border-bottom:1px solid #ffffff18}.data-table th{background:#ffffff0e;color:#a9b5d4}.data-table td{font-size:13px}.callout-info{padding:14px;border-radius:14px;background:#8276ef1a;border:1px solid #9f92ff75}.error-text{color:#ffabb2}.success-text{color:#7de7c4}.code-once{font-size:27px;letter-spacing:4px;color:#b9fce7;direction:ltr;display:block;margin:17px auto;text-align:center;user-select:all}.mini-lesson-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(225px,1fr));gap:15px}.lesson-tile{border:1px solid var(--edge);background:var(--surface);border-radius:19px;padding:20px;color:white;text-align:right}.lesson-tile:hover{border-color:#a99aff}.lesson-tile .emoji{font-size:32px}.row-between{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}.action-group{display:flex;gap:6px;flex-wrap:wrap}.action-group .btn{font-size:11px;min-height:34px;padding:6px 10px}.meter{height:8px;background:#ffffff15;border-radius:20px;overflow:hidden}.meter span{display:block;height:100%;background:#63e9c5}.auth-tip{color:#afb7d2;font-size:12px;margin-top:14px}.banner{padding:30px;background:linear-gradient(105deg,#272658,#162047);border-radius:25px;border:1px solid #8473b659}.banner h1{font-size:clamp(24px,3.5vw,38px);margin:0}.banner p{color:#c5cee8}.quiz-ui{margin-top:20px}.answer-feedback{border-radius:13px;padding:16px;background:#4cddb216;border:1px solid #66e4c164;margin:20px 0}.answer-feedback.wrong{background:#ff8c7912;border-color:#ff8c7960}.answer-feedback ol{padding-right:20px}.error-msg{background:#ff8a9621;border:1px solid #ff8c9e7e;border-radius:12px;padding:13px}.lightbox{position:fixed;inset:0;display:grid;place-items:center;background:#060814d8;z-index:300;padding:16px}.modal{width:min(560px,100%);max-height:90vh;overflow:auto;padding:25px}.teacher-certificate{max-width:760px;margin:auto;text-align:center;padding:36px;border:8px double #a58b56;background:#fffcf1;color:#272440}.teacher-certificate h2{font-size:32px}.teacher-certificate h3{font-size:27px;color:#6244ad}.teacher-certificate .signed{display:flex;justify-content:space-between;margin-top:35px;border-top:1px solid #c8ad75;padding-top:14px}.footer-mini{font-size:11px;color:#818ba9;text-align:center;padding:16px}#printSheet{display:none}@media(max-width:650px){.field-grid{grid-template-columns:1fr}.container{padding:18px 13px 60px}.auth-panel{padding:24px}.lesson-layout{grid-template-columns:1fr}.app-head{padding:15px}.data-table{min-width:720px}}@media print{body>#app{display:none!important}#printSheet{display:block!important;position:static!important;background:white;color:#222;margin:0;padding:10mm}@page{size:A4 portrait;margin:8mm}}


/* SCIENCEVERSE — interactive science section, consistent with MATHVERSE colors */
.science-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:27px 30px;margin-bottom:16px;border-radius:25px;border:1px solid rgba(101,229,199,.25);background:linear-gradient(120deg,rgba(33,66,88,.7),rgba(35,32,79,.7))}
.science-header h2{font-size:clamp(24px,3vw,38px);margin:4px 0 9px}
.science-header p{margin:0;line-height:1.8}
.science-orbit{font-size:76px;color:#69e3ce;text-shadow:0 0 26px #56e4ba6b}
.science-menu{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 22px}
.sci-summary{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding:18px 24px;border-radius:17px;border:1px solid #80dcca44;background:#69dcc014;margin-bottom:18px}
.sci-summary strong{color:#a3f7e4}
.sci-worlds{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:17px}
.sci-world{display:flex;flex-direction:column;gap:9px;text-align:right;min-height:252px;border-radius:22px;border:1px solid rgba(160,190,220,.25);border-top:4px solid var(--accent,#76e2c5);color:#f9fafc;background:linear-gradient(150deg,rgba(31,45,77,.97),rgba(19,30,61,.95));padding:23px 21px;cursor:pointer;transition:transform .22s,border-color .22s,box-shadow .22s}
.sci-world:hover,.sci-world:focus-visible{transform:translateY(-4px);border-color:var(--accent,#76e2c5);box-shadow:0 12px 35px #080e2599}
.sci-world-icon{font-size:42px}
.sci-world strong{font-size:21px;line-height:1.5}
.sci-world small{font-size:13px;color:#c1c9e3;line-height:1.7;flex:1}
.sci-meta,.sci-go{font-size:13px;color:#b5f9e4;font-weight:700}
.sci-world .meter{margin:7px 0 0}
.sci-world .meter span{background:var(--accent,#68dfc1)}
.sci-lesson-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(220px,1fr);gap:18px;margin:16px 0}
.sci-section{background:#182543;border:1px solid rgba(156,177,224,.23);box-shadow:0 10px 25px #05081933;border-radius:22px;padding:26px;color:#edf4ff}
.sci-section h3{font-size:21px;margin:9px 0 18px}
.sci-section p{line-height:1.9}
.sci-facts{padding-inline-start:24px;display:grid;gap:10px;line-height:1.75}
.sci-facts li::marker{color:#6ceacb}
.sci-rule{border-radius:15px;background:#61dbc620;border:1px solid #5bd7c078;color:#c7ffee;font-weight:800;padding:16px;margin:18px 0}
.sci-caution{border:1px solid #f3ce7c65;border-radius:13px;background:#dba96c17;color:#fce5ba;padding:13px;font-size:12px}
.sci-options{display:grid;gap:12px;margin:15px 0}
.sci-option{display:flex;gap:12px;align-items:center;padding:16px;cursor:pointer;border-radius:14px;border:1px solid #8f9ec444;background:#121d3a;transition:background .2s}
.sci-option:hover{background:#283655}
.sci-option:has(input:checked){border-color:#7ce9c8;background:#1c4b5266}
.sci-option input{width:19px;height:19px;accent-color:#6be7c0}
.sci-option span{line-height:1.5}
.sci-feedback{margin-top:20px;padding:17px;background:#56d9b323;border:1px solid #71ecd581;border-radius:15px;line-height:1.8}
.sci-feedback.wrong{background:#e5857923;border-color:#fd9b9081}
.sci-feedback ol{padding-inline-start:24px}
.sci-slider-label{display:grid;gap:8px;padding:15px;margin:16px 0;background:#152443;border:1px solid #758bc65b;border-radius:14px}
.sci-slider-label input{width:100%;accent-color:#72f1cf;cursor:pointer}
.sci-visual,.science-svg{display:block;width:100%;max-width:700px;margin:12px auto 20px;min-height:160px;border-radius:17px}
.sci-sea{height:230px;position:relative;border-radius:20px;overflow:hidden;background:linear-gradient(#267ba8,#122a6c);display:flex;align-items:center;justify-content:space-around}
.sci-fish,.sci-diver{font-size:65px;filter:drop-shadow(0 3px 10px #071435)}
.sci-bubbles{position:absolute;left:25%;bottom:18px;font-size:22px}
.sci-observation{font-size:16px;border:1px solid #a5d9e47b;background:#28545d47;padding:15px;border-radius:15px;line-height:1.75}
.sci-gases{display:flex;height:90px;margin:26px auto 19px;gap:2px;overflow:hidden;border-radius:12px;direction:ltr}
.sci-gases div{display:flex;align-items:center;justify-content:center;white-space:nowrap;color:#15233f;font-size:14px;font-weight:850}
.sci-lime{max-width:260px;min-height:95px;display:grid;place-items:center;text-align:center;border-radius:20px;margin:20px auto;background:#cee7ff;color:#234364;font-weight:900;border:5px double #76a9d9}
.sci-lime.cloudy{background:#e8e8e0}
.sci-triangle{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}
.sci-toggle{padding:13px 9px;border:1px solid #bfc7e777;background:#202e50;color:#d4dbea;border-radius:13px;cursor:pointer}
.sci-toggle.active{border-color:#74edcd;background:#21665999;color:#c7ffed}
@media (max-width:780px){.sci-lesson-grid{grid-template-columns:1fr}.science-header{padding:20px}.science-orbit{font-size:45px}.sci-triangle{grid-template-columns:1fr}}
@media print{.science-header,.science-menu,.sci-section,.sci-world{display:none!important}}