:root{
  --bg:#030712; --panel:#0b1220; --panel2:#111827; --card:#0f172a; --text:#e5eefc; --muted:#9fb1cf;
  --line:rgba(148,163,184,.25); --brand:#5ddcff; --brand2:#8b5cf6; --good:#22c55e; --bad:#ef4444; --warn:#f59e0b;
  --paper:#ffffff; --ink:#111827;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:radial-gradient(circle at top right,rgba(139,92,246,.24),transparent 35%),linear-gradient(135deg,#020617,#07111f 55%,#03111a);color:var(--text);min-height:100vh;line-height:1.6}
a{color:inherit}.container{width:min(1120px,calc(100% - 32px));margin:auto}.skip-link{position:absolute;left:-999px;top:10px;background:white;color:black;padding:.7rem 1rem;border-radius:10px;z-index:20}.skip-link:focus{left:10px}.site-header{position:sticky;top:0;z-index:10;background:rgba(3,7,18,.82);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem 0}.brand{display:flex;align-items:center;gap:.8rem;text-decoration:none}.brand img{width:72px;height:auto}.brand-text span{display:block;font-weight:900;letter-spacing:.02em}.brand-text small{color:var(--muted)}.nav-links{display:flex;gap:.4rem;flex-wrap:wrap;align-items:center}.nav-links a{text-decoration:none;color:var(--muted);padding:.55rem .75rem;border-radius:999px}.nav-links a:hover,.nav-links a.active{background:rgba(93,220,255,.12);color:#fff}.nav-toggle{display:none;background:var(--card);border:1px solid var(--line);color:white;border-radius:12px;padding:.6rem .8rem}.progress-chip,.badge{border:1px solid var(--line);background:rgba(255,255,255,.06);color:var(--text);padding:.45rem .7rem;border-radius:999px;font-size:.88rem}.badge.done{border-color:rgba(34,197,94,.45);background:rgba(34,197,94,.14)}.badge.lock{color:#cbd5e1;background:rgba(148,163,184,.08)}.badge.warn{border-color:rgba(245,158,11,.5);background:rgba(245,158,11,.16)}
.hero{padding:5rem 0 3rem}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:2rem;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.18em;color:#93c5fd;font-size:.82rem;font-weight:800}.hero h1,.page-hero h1{font-size:clamp(2.4rem,5vw,5rem);line-height:.95;margin:.7rem 0 1rem}.gradient-text{background:linear-gradient(90deg,var(--brand),var(--brand2),var(--good));-webkit-background-clip:text;background-clip:text;color:transparent}.lead{font-size:1.18rem;color:#cbd5e1;max-width:760px}.hero-visual{border:1px solid var(--line);border-radius:30px;overflow:hidden;box-shadow:0 30px 100px rgba(0,0,0,.4)}.hero-visual img{display:block;width:100%}.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.4rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;text-decoration:none;border:none;cursor:pointer;font-weight:800;color:#06111d;background:linear-gradient(90deg,var(--brand),var(--good));padding:.85rem 1rem;border-radius:14px;box-shadow:0 14px 35px rgba(45,212,191,.18)}.btn.secondary{background:rgba(255,255,255,.06);color:#fff;border:1px solid var(--line);box-shadow:none}.btn.danger{background:rgba(239,68,68,.12);color:#fecaca;border:1px solid rgba(239,68,68,.3);box-shadow:none}.btn:disabled{opacity:.55;cursor:not-allowed}.section{padding:2.5rem 0}.section h2{font-size:clamp(1.7rem,3vw,2.5rem);margin:.2rem 0 1rem}.card{background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.035));border:1px solid var(--line);border-radius:24px;box-shadow:0 20px 70px rgba(0,0,0,.22)}.card.pad{padding:1.2rem}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.feature{padding:1.2rem}.feature h3,.course-card h3,.lesson-card h2{margin-top:0}.feature p,.course-card p,.small{color:var(--muted)}.course-map{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem}.course-card{position:relative;padding:1rem;overflow:hidden;text-decoration:none;min-height:260px}.course-card img{width:100%;border-radius:18px;border:1px solid var(--line);opacity:.9}.course-card.locked{filter:saturate(.55);opacity:.72}.course-card.locked:after{content:'Locked';position:absolute;inset:auto 1rem 1rem auto;background:rgba(0,0,0,.65);border:1px solid var(--line);padding:.5rem .8rem;border-radius:999px;color:white;font-weight:800}.card-head{display:flex;justify-content:space-between;gap:.8rem;align-items:center;margin-bottom:.7rem}.bar{height:12px;background:rgba(255,255,255,.08);border:1px solid var(--line);border-radius:999px;overflow:hidden}.bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand2),var(--good));transition:.5s}.page-hero{padding:2rem 0 1rem}.breadcrumb{color:var(--muted);margin-bottom:1rem}.breadcrumb a{color:#93c5fd;text-decoration:none}.breadcrumb span{margin:0 .35rem}.topic-meta{display:flex;gap:.5rem;flex-wrap:wrap}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:1rem;align-items:start;padding-bottom:2.5rem}.lesson-card{padding:1.4rem;margin-bottom:1rem}.big-idea{border-color:rgba(93,220,255,.38)}.idea-sentence{font-size:1.35rem;color:#fff;font-weight:800}.concept-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:1rem}.concept,.study-task,.formula-item,.teacher-note{background:rgba(255,255,255,.055);border:1px solid var(--line);padding:1rem;border-radius:18px}.concept h3{margin-top:0;color:#bfdbfe}.method-list,.steps{padding-left:1.2rem}.method-list li,.steps li{margin:.55rem 0}.trap-list{list-style:none;padding:0;margin:0;display:grid;gap:.65rem}.trap-list li{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.25);padding:.8rem;border-radius:14px}.trap-title{display:block;color:#fecaca;font-weight:900}.side-card{position:sticky;top:92px;padding:1rem}.topic-visual img{width:100%;border-radius:20px;border:1px solid var(--line)}.mini-list{display:grid;gap:.45rem}.mini-list a{display:block;text-decoration:none;color:#dbeafe;background:rgba(255,255,255,.05);border:1px solid var(--line);padding:.6rem;border-radius:12px}.locked-screen{text-align:center;padding:3rem;margin:3rem auto;max-width:760px}.lock-mark{width:72px;height:72px;border-radius:22px;display:grid;place-items:center;background:rgba(245,158,11,.15);border:1px solid rgba(245,158,11,.3);font-size:2rem;font-weight:900;margin:0 auto 1rem}.quiz-shell{max-width:850px;margin:2rem auto 3rem}.question-number{color:#93c5fd;font-weight:900;text-transform:uppercase;letter-spacing:.12em}.question-box{padding:1.3rem}.question-box h1{font-size:clamp(1.8rem,3vw,2.8rem)}.options{display:grid;gap:.8rem;margin:1.2rem 0}.option{width:100%;text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.055);color:#f8fafc;padding:1rem;border-radius:16px;font-size:1rem;cursor:pointer}.option:hover{border-color:#93c5fd}.option.correct{background:rgba(34,197,94,.16);border-color:rgba(34,197,94,.5)}.option.wrong{background:rgba(239,68,68,.16);border-color:rgba(239,68,68,.5)}.feedback{margin-top:1rem;padding:1rem;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.055)}.feedback.good{border-color:rgba(34,197,94,.5);background:rgba(34,197,94,.12)}.feedback.bad{border-color:rgba(239,68,68,.5);background:rgba(239,68,68,.12)}.quiz-progress-dots{display:flex;gap:.35rem;flex-wrap:wrap;margin:1rem 0}.quiz-progress-dots span{width:28px;height:28px;border:1px solid var(--line);border-radius:999px;display:grid;place-items:center;font-size:.8rem;color:var(--muted)}.quiz-progress-dots span.done{background:rgba(34,197,94,.16);border-color:rgba(34,197,94,.5);color:#dcfce7}.quiz-progress-dots span.current{background:rgba(93,220,255,.15);border-color:rgba(93,220,255,.5);color:#dff8ff}.hidden{display:none!important}.footer{border-top:1px solid var(--line);padding:1.5rem 0;color:var(--muted);background:rgba(0,0,0,.18)}.footer-grid{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}.footer-links{display:flex;gap:.8rem;flex-wrap:wrap}.footer-links a{color:#dbeafe;text-decoration:none}.worksheet-hero{display:grid;grid-template-columns:1fr 330px;gap:1.5rem;align-items:center}.worksheet-hero img{width:100%;border-radius:24px;border:1px solid var(--line)}.worksheet-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem}.worksheet-card{padding:1rem;text-decoration:none}.teacher-panel{background:linear-gradient(180deg,rgba(34,197,94,.10),rgba(93,220,255,.05));border-color:rgba(34,197,94,.35)}.print-page{background:#fff;color:#111827}.worksheet-paper{width:min(980px,calc(100% - 24px));margin:1rem auto 3rem;background:#fff;color:#111827;border-radius:20px;box-shadow:0 18px 80px rgba(0,0,0,.3);overflow:hidden}.worksheet-header{padding:1.3rem 1.5rem;background:#e0f2fe;border-bottom:3px solid #0f172a}.worksheet-header h1{margin:.2rem 0}.worksheet-body{padding:1.5rem}.worksheet-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:.7rem;margin:1rem 0}.worksheet-meta div{border:1px solid #94a3b8;border-radius:10px;padding:.6rem}.worksheet-section{border:2px solid #cbd5e1;border-radius:16px;padding:1rem;margin:1rem 0;break-inside:avoid}.worksheet-section h2{font-size:1.2rem;margin-top:0}.worksheet-questions{display:grid;gap:.8rem;counter-reset:q}.worksheet-questions li{margin-left:1.2rem;padding:.3rem 0}.answer-lines{height:42px;border-bottom:1px solid #94a3b8;margin:.2rem 0 .5rem}.answer-key{background:#f8fafc}.answer-key summary{font-weight:900;cursor:pointer}.answer-table{width:100%;border-collapse:collapse;margin-top:1rem}.answer-table td,.answer-table th{border:1px solid #94a3b8;padding:.5rem;text-align:left}.no-print{display:initial}.parent-teacher-guide{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem}.guide-box{border:1px solid #94a3b8;border-radius:14px;padding:1rem;background:#f8fafc}.top-print-bar{width:min(980px,calc(100% - 24px));margin:1rem auto;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}.top-print-bar a{color:#dbeafe}.certificate{background:white;color:#0f172a;text-align:center;padding:3rem;border-radius:28px;border:8px double #0f172a}.certificate h1{font-size:3rem}.formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem}.formula-item{display:grid;gap:.3rem}.formula-item.locked{opacity:.55}.search-input{width:100%;padding:1rem;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.06);color:white;font-size:1rem}.filter-row{display:flex;gap:.8rem;flex-wrap:wrap;align-items:center}.filter-row .search-input{max-width:420px}.select{padding:.95rem;border-radius:16px;border:1px solid var(--line);background:#0f172a;color:white}.mission-table{width:100%;border-collapse:collapse}.mission-table td,.mission-table th{padding:.8rem;border-bottom:1px solid var(--line);text-align:left}.mission-table th{color:#bfdbfe}.toast{position:fixed;right:16px;bottom:16px;background:#052e16;color:#dcfce7;border:1px solid rgba(34,197,94,.45);padding:1rem;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.35);z-index:30;max-width:320px}
@media(max-width:850px){.hero-grid,.lesson-layout,.worksheet-hero{grid-template-columns:1fr}.side-card{position:static}.grid-3,.grid-2{grid-template-columns:1fr}.nav-toggle{display:block}.nav-links{display:none;position:absolute;left:16px;right:16px;top:78px;background:#07111f;border:1px solid var(--line);border-radius:20px;padding:1rem}.nav-links.open{display:grid}.progress-chip{display:none}.hero{padding-top:3rem}.worksheet-meta{grid-template-columns:1fr}.footer-grid{display:grid}}
@media print{body{background:white;color:black}.site-header,.footer,.top-print-bar,.no-print{display:none!important}.worksheet-paper{width:100%;box-shadow:none;margin:0;border-radius:0}.worksheet-body{padding:1rem}.worksheet-section{break-inside:avoid}.answer-key details:not([open]){display:none}.answer-key{page-break-before:always}.worksheet-header{background:#fff}.worksheet-paper *{color:#111827!important}.btn{display:none!important}}


/* Teacher account portal */
.teacher-status{display:inline-flex;align-items:center;gap:.45rem;border:1px solid rgba(245,158,11,.45);background:rgba(245,158,11,.14);color:#fff7ed;padding:.45rem .7rem;border-radius:999px;font-size:.88rem;font-weight:800}
.teacher-status.off{border-color:var(--line);background:rgba(255,255,255,.06);color:var(--muted);font-weight:700}
.teacher-hero{padding:3.5rem 0 2rem}.teacher-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;align-items:start}.auth-card{padding:1.2rem}
.auth-card label{display:block;font-weight:800;margin:.8rem 0 .35rem}.auth-card input,.auth-card select,.search-input{width:100%;border:1px solid var(--line);background:rgba(255,255,255,.06);color:#fff;border-radius:14px;padding:.85rem 1rem;font-size:1rem}
.auth-card input:focus,.search-input:focus{outline:2px solid rgba(93,220,255,.45);border-color:rgba(93,220,255,.8)}
.teacher-dashboard{display:grid;grid-template-columns:1.2fr .8fr;gap:1rem;align-items:start}.teacher-actions{display:flex;gap:.7rem;flex-wrap:wrap}
.teacher-table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:16px}.teacher-table th,.teacher-table td{border-bottom:1px solid var(--line);padding:.75rem;text-align:left}.teacher-table th{color:#bfdbfe;background:rgba(255,255,255,.06)}.teacher-table a{color:#dbeafe}
.teacher-callout{border-color:rgba(245,158,11,.45);background:linear-gradient(180deg,rgba(245,158,11,.16),rgba(255,255,255,.04))}
.teacher-only-panel{border:1px solid rgba(245,158,11,.35);background:rgba(245,158,11,.10);padding:1rem;border-radius:18px;margin-top:1rem}
.auth-message{margin-top:1rem;padding:1rem;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.055)}.auth-message.good{border-color:rgba(34,197,94,.5);background:rgba(34,197,94,.12)}.auth-message.bad{border-color:rgba(239,68,68,.5);background:rgba(239,68,68,.12)}
.mode-banner{border-bottom:1px solid rgba(245,158,11,.35);background:rgba(245,158,11,.10);color:#fff7ed;padding:.55rem 0;font-size:.92rem}
.mode-banner .container{display:flex;justify-content:space-between;gap:1rem;align-items:center}.mode-banner a{color:#fde68a;font-weight:900;text-decoration:none}
.course-card.teacher-unlocked:after{content:'Teacher unlocked';position:absolute;inset:auto 1rem 1rem auto;background:rgba(245,158,11,.85);border:1px solid rgba(253,230,138,.7);padding:.5rem .8rem;border-radius:999px;color:#111827;font-weight:900}
.quick-link-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:.65rem}.quick-link-grid a{display:block;text-decoration:none;background:rgba(255,255,255,.055);border:1px solid var(--line);padding:.75rem;border-radius:14px;color:#e0f2fe}
.student-lock-note{border:1px solid rgba(93,220,255,.25);background:rgba(93,220,255,.08);padding:1rem;border-radius:16px}
@media (max-width:850px){.teacher-grid,.teacher-dashboard{grid-template-columns:1fr}.mode-banner .container{display:block}.teacher-actions .btn{width:100%}}
@media print{.teacher-status,.mode-banner{display:none!important}}

/* Verified teacher email flow */
.server-note{margin-top:1rem;border:1px solid rgba(93,220,255,.25);background:rgba(93,220,255,.08);padding:.85rem;border-radius:14px;color:#dbeafe;font-size:.92rem}
.auth-card input:invalid{border-color:rgba(239,68,68,.45)}
.auth-card button:disabled{opacity:.55;cursor:wait}

/* Premium certificate */
.certificate-control{max-width:760px;margin:0 auto 1.2rem}.certificate-control label{display:block;font-weight:900;margin:.7rem 0 .35rem}
.premium-certificate{background:linear-gradient(135deg,#ffffff 0%,#f8fbff 45%,#eef8ff 100%);color:#0f172a;text-align:center;padding:1.1rem;border-radius:34px;border:0;box-shadow:0 30px 120px rgba(0,0,0,.35);position:relative;overflow:hidden}
.premium-certificate:before{content:'';position:absolute;inset:-20%;background:radial-gradient(circle at 20% 20%,rgba(14,165,233,.16),transparent 32%),radial-gradient(circle at 80% 10%,rgba(34,197,94,.13),transparent 28%),radial-gradient(circle at 50% 90%,rgba(99,102,241,.12),transparent 32%);pointer-events:none}
.certificate-frame{position:relative;border:7px double #0f172a;border-radius:26px;padding:2.4rem;background:rgba(255,255,255,.62)}
.certificate-topline{display:flex;justify-content:space-between;gap:1rem;color:#334155;font-weight:900;text-transform:uppercase;letter-spacing:.12em;font-size:.78rem}
.certificate-seal{width:132px;height:132px;margin:1.2rem auto .7rem;border-radius:999px;display:grid;place-items:center;filter:drop-shadow(0 12px 24px rgba(15,23,42,.18))}.certificate-seal img{width:100%;height:100%}
.certificate-kicker{font-size:.92rem;text-transform:uppercase;letter-spacing:.2em;color:#0369a1;font-weight:900;margin:0}
.premium-certificate h1{font-size:clamp(2.2rem,5vw,4.2rem);line-height:.95;margin:.5rem 0;color:#0f172a}.certificate-presented{margin:1rem 0 .25rem;color:#475569;font-weight:700}.premium-certificate h2{font-size:clamp(2rem,4vw,3.4rem);margin:.2rem auto 1rem;display:inline-block;border-bottom:3px solid #0ea5e9;padding:0 .8rem .35rem;color:#075985}.certificate-statement{max-width:820px;margin:0 auto 1.3rem;font-size:1.06rem;line-height:1.7;color:#334155}.certificate-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:.8rem;margin:1.2rem 0}.certificate-meta div{border:1px solid #94a3b8;border-radius:16px;padding:.8rem;background:#fff}.certificate-meta strong{display:block;color:#0f172a}.certificate-meta span{display:block;color:#334155;margin-top:.25rem}.certificate-skills,.certificate-missions{border:1px solid #cbd5e1;background:#ffffff;border-radius:18px;padding:1rem;margin:1rem 0;text-align:left}.certificate-skills h3,.certificate-missions h3{margin-top:0;text-align:center;color:#075985}.certificate-skills ul{display:grid;grid-template-columns:repeat(4,1fr);gap:.6rem;list-style:none;padding:0;margin:0}.certificate-skills li{background:#e0f2fe;border:1px solid #7dd3fc;border-radius:999px;text-align:center;padding:.55rem;font-weight:900;color:#0f172a}.certificate-missions ol{display:grid;grid-template-columns:repeat(2,1fr);gap:.45rem;list-style:none;margin:0;padding:0}.certificate-missions li{display:flex;align-items:center;gap:.5rem;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:.5rem}.certificate-missions li span{width:26px;height:26px;border-radius:999px;background:#0f172a;color:#fff;display:grid;place-items:center;font-size:.8rem;font-weight:900;flex:0 0 auto}.certificate-signatures{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin:2.2rem auto .5rem;max-width:720px}.certificate-signatures span{display:block;border-top:2px solid #0f172a;margin-bottom:.45rem}.certificate-signatures strong{font-size:.9rem;color:#334155}
@media(max-width:850px){.certificate-meta,.certificate-skills ul,.certificate-missions ol,.certificate-signatures{grid-template-columns:1fr}.certificate-topline{display:grid;text-align:center}.certificate-frame{padding:1.2rem}.certificate-seal{width:96px;height:96px}}
@media print{.premium-certificate{box-shadow:none;border-radius:0;min-height:100vh;padding:.5rem}.certificate-frame{min-height:calc(100vh - 1rem);display:flex;flex-direction:column;justify-content:center}.certificate-skills,.certificate-missions,.certificate-meta div{break-inside:avoid}.certificate-control{display:none!important}}


/* Maths Universe Game Mode additions */
.game-btn{background:linear-gradient(90deg,#facc15,#22c55e,#5ddcff);box-shadow:0 0 28px rgba(93,220,255,.28),0 16px 40px rgba(250,204,21,.18);position:relative;overflow:hidden}.game-btn:after{content:"";position:absolute;inset:-80% -20%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.45),transparent);transform:rotate(20deg) translateX(-120%);animation:shine 3s infinite}@keyframes shine{0%,60%{transform:rotate(20deg) translateX(-120%)}80%,100%{transform:rotate(20deg) translateX(120%)}}
.game-hud{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:1rem}.game-hud span{display:inline-flex;gap:.35rem;align-items:center;border:1px solid rgba(93,220,255,.35);background:rgba(93,220,255,.10);padding:.48rem .7rem;border-radius:999px;font-weight:800}.game-hud.big{margin:0 0 1rem}.game-hud b{color:#fef08a}.game-promo{display:grid;grid-template-columns:1fr 1.1fr;gap:1rem;align-items:center;background:radial-gradient(circle at top left,rgba(250,204,21,.16),transparent 38%),linear-gradient(180deg,rgba(93,220,255,.12),rgba(139,92,246,.06));}.game-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.game-tile{text-decoration:none;text-align:center;padding:1rem;border:1px solid var(--line);border-radius:22px;background:rgba(255,255,255,.06);transition:.18s transform,.18s border-color}.game-tile:hover{transform:translateY(-4px);border-color:#5ddcff}.game-tile span{display:block;font-size:2.2rem}.game-tile strong{display:block;font-size:1.1rem}.game-tile small{color:var(--muted)}.game-page-hero{padding-bottom:.5rem}.arena-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:1rem;align-items:start}.battle-card{min-height:620px;background:radial-gradient(circle at top right,rgba(239,68,68,.13),transparent 36%),linear-gradient(180deg,rgba(255,255,255,.085),rgba(255,255,255,.035));}.battle-top{display:flex;align-items:center;justify-content:space-between;gap:1rem}.enemy-face{width:92px;height:92px;display:grid;place-items:center;font-size:3.6rem;border-radius:28px;background:rgba(255,255,255,.07);border:1px solid var(--line);box-shadow:inset 0 0 25px rgba(93,220,255,.08)}.health-row{display:grid;grid-template-columns:110px 1fr 44px;gap:.7rem;align-items:center;margin:.75rem 0;color:#dbeafe}.health{height:16px;border-radius:999px;overflow:hidden;background:rgba(255,255,255,.08);border:1px solid var(--line)}.health span{display:block;height:100%;width:100%;background:linear-gradient(90deg,#22c55e,#5ddcff);transition:.25s}.health.monster span{background:linear-gradient(90deg,#ef4444,#facc15)}.question-panel{margin-top:1rem;border:1px solid rgba(93,220,255,.28);border-radius:24px;padding:1rem;background:rgba(0,0,0,.18)}.question-meta{display:flex;justify-content:space-between;gap:1rem;color:#bae6fd;font-weight:900}.battle-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin:1rem 0}.battle-feedback{padding:1rem;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.055);font-weight:800}.battle-feedback.good{border-color:rgba(34,197,94,.5);background:rgba(34,197,94,.13);color:#dcfce7}.battle-feedback.bad{border-color:rgba(239,68,68,.5);background:rgba(239,68,68,.13);color:#fecaca}.game-side{position:sticky;top:92px}.mode-pills{display:grid;gap:.55rem}.mode-pill,.powerup{border:1px solid var(--line);background:rgba(255,255,255,.06);color:#fff;border-radius:14px;padding:.8rem;text-align:left;font-weight:900;cursor:pointer}.mode-pill.active,.mode-pill:hover{border-color:#5ddcff;background:rgba(93,220,255,.13)}.powerups{display:grid;grid-template-columns:1fr 1fr;gap:.55rem}.powerup small{display:block;color:#fef08a}.course-card:hover{transform:translateY(-4px);border-color:rgba(93,220,255,.55);box-shadow:0 22px 75px rgba(93,220,255,.12)}.course-card{transition:.18s transform,.18s border-color,.18s box-shadow}.option.correct{animation:pop .28s ease}.option.wrong{animation:shake .25s ease}@keyframes pop{50%{transform:scale(1.04)}}@keyframes shake{25%{transform:translateX(-3px)}50%{transform:translateX(3px)}75%{transform:translateX(-2px)}}
@media(max-width:820px){.arena-grid,.game-promo{grid-template-columns:1fr}.game-tiles{grid-template-columns:1fr}.battle-options{grid-template-columns:1fr}.game-side{position:static}.enemy-face{width:74px;height:74px;font-size:2.8rem}}


/* Added diagram support */
.diagram-card{display:grid;gap:1rem}
.diagram-image{width:100%;height:auto;display:block;border-radius:18px;border:1px solid rgba(255,255,255,.12);box-shadow:0 18px 45px rgba(0,0,0,.18);background:#0f173a}
.lesson-card .diagram-image{margin-top:1rem}


/* Homepage mode chooser */
.mode-choice-top{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.2rem 0 1rem}
.mode-choice-card{display:flex;flex-direction:column;gap:.45rem;padding:1rem 1.1rem;border-radius:20px;text-decoration:none;border:1px solid rgba(255,255,255,.14);box-shadow:0 14px 35px rgba(0,0,0,.18);transition:transform .2s ease, box-shadow .2s ease}
.mode-choice-card:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(0,0,0,.22)}
.mode-choice-card.normal{background:linear-gradient(180deg, rgba(255,255,255,.12), rgba(110,180,255,.12))}
.mode-choice-card.game{background:linear-gradient(180deg, rgba(152,91,255,.22), rgba(35,16,94,.4))}
.mode-choice-card strong{font-size:1.18rem}
.mode-choice-card small{color:var(--muted,#cfd8ff);line-height:1.45}
.mode-tag{display:inline-flex;align-self:flex-start;padding:.3rem .7rem;border-radius:999px;background:rgba(255,255,255,.14);font-weight:700;font-size:.85rem}
.big-mode-btn{font-size:1.05rem;padding:.95rem 1.2rem}
@media (max-width: 800px){.mode-choice-top{grid-template-columns:1fr}}


/* Mixed kids + parents homepage */
.hero-mixed .mode-choice-card.normal{background:linear-gradient(180deg, rgba(255,255,255,.12), rgba(103,173,255,.10)); border-color:rgba(255,255,255,.18)}
.hero-mixed .mode-choice-card.game{background:linear-gradient(180deg, rgba(152,91,255,.26), rgba(31,17,92,.42)); border-color:rgba(255,222,130,.25)}
.hero-mixed .big-mode-btn{font-size:1.08rem}
.convince-note{margin-top:.9rem;padding:.8rem 1rem;border-radius:14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12)}
.trust-strip .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
@media (max-width: 800px){.trust-strip .grid-3{grid-template-columns:1fr}}


/* Super polished homepage */
.hero-polished{position:relative}
.polished-grid{align-items:center;gap:2rem}
.mode-showcase{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.2rem 0}
.showcase-panel{display:block;padding:1.15rem;border-radius:24px;text-decoration:none;border:1px solid rgba(255,255,255,.14);box-shadow:0 18px 40px rgba(0,0,0,.22);transition:transform .2s ease, box-shadow .2s ease;background:rgba(255,255,255,.06)}
.showcase-panel:hover{transform:translateY(-3px);box-shadow:0 22px 48px rgba(0,0,0,.26)}
.showcase-panel.normal{background:linear-gradient(180deg, rgba(255,255,255,.13), rgba(104,172,255,.12));border-color:rgba(255,255,255,.20)}
.showcase-panel.game{background:linear-gradient(180deg, rgba(154,93,255,.30), rgba(36,18,96,.48));border-color:rgba(255,226,132,.28)}
.showcase-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:.7rem}
.showcase-icon{font-size:1.8rem}
.showcase-panel h3{margin:.15rem 0 .55rem}
.showcase-panel ul{margin:0 0 .8rem 1rem;padding:0;display:grid;gap:.35rem}
.showcase-cta{display:inline-flex;font-weight:700}
.giant-btn{font-size:1.12rem;padding:1rem 1.35rem;min-width:220px;justify-content:center}
.polished-actions{gap:.9rem;margin-top:.6rem}
.hero-mini-proof{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0 .8rem}
.hero-mini-proof span{padding:.45rem .75rem;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);font-size:.92rem}
.polished-visual img{filter:drop-shadow(0 20px 50px rgba(52,32,120,.38))}
.polished-promo,.polished-card,.polished-strip{box-shadow:0 22px 55px rgba(0,0,0,.18)}
.polished-features .feature{box-shadow:0 18px 42px rgba(0,0,0,.14)}
@media (max-width: 900px){.mode-showcase{grid-template-columns:1fr}.giant-btn{min-width:0;width:100%}}


/* Ultimate homepage tuning */
.hero-ultimate .convince-note{margin-top:1rem;max-width:56rem}
.hero-ultimate .showcase-panel h3{font-size:1.25rem}
.hero-ultimate .showcase-panel ul li{line-height:1.4}
.hero-ultimate .giant-btn{font-size:1.12rem}


/* Final matching logo + banner */
.brand img{width:56px;height:56px;object-fit:contain;border-radius:14px;filter:drop-shadow(0 8px 18px rgba(89,120,255,.25))}
.hero-ultimate .polished-visual{border-radius:32px;overflow:hidden;background:rgba(255,255,255,.04)}
.hero-ultimate .polished-visual img{width:100%;height:auto;display:block}
@media (min-width: 950px){.hero-ultimate .polished-visual{transform:scale(1.03)}}


/* Added fractions worksheet PDF pack */
.worksheet-feature-banner{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(240px,.8fr);gap:1.2rem;align-items:center;background:radial-gradient(circle at top right,rgba(250,204,21,.14),transparent 36%),linear-gradient(180deg,rgba(93,220,255,.10),rgba(139,92,246,.06));overflow:hidden}
.worksheet-feature-banner img{width:100%;border-radius:18px;border:1px solid rgba(255,255,255,.14);box-shadow:0 18px 42px rgba(0,0,0,.22)}
.worksheet-pack-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,420px);gap:1.2rem;align-items:center;background:radial-gradient(circle at bottom left,rgba(139,92,246,.16),transparent 40%),rgba(255,255,255,.055)}
.worksheet-pack-feature img{width:100%;border-radius:18px;border:1px solid rgba(255,255,255,.14);box-shadow:0 18px 42px rgba(0,0,0,.2)}
.worksheet-preview-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-top:1rem}
.worksheet-preview{padding:0;overflow:hidden}.worksheet-preview img{width:100%;display:block;background:#fff}.worksheet-preview h3,.worksheet-preview p{padding:0 1rem}.worksheet-preview p{padding-bottom:1rem}.worksheet-pack-mini{background:linear-gradient(180deg,rgba(250,204,21,.12),rgba(93,220,255,.08))}
@media(max-width:820px){.worksheet-feature-banner,.worksheet-pack-feature{grid-template-columns:1fr}.worksheet-feature-banner img{max-height:360px;object-fit:cover;object-position:top}}
@media print{.worksheet-feature-banner,.worksheet-pack-feature,.worksheet-preview-grid{break-inside:avoid}}


/* Premium features */
.premium-btn{background:linear-gradient(135deg,#ffe45c,#ff8a3d 55%,#a855f7);color:#1a1038;border:0;font-weight:800;box-shadow:0 16px 38px rgba(255,174,60,.22)}
.premium-hero{background:radial-gradient(circle at 15% 20%,rgba(255,228,92,.18),transparent 32%),radial-gradient(circle at 80% 10%,rgba(168,85,247,.20),transparent 34%)}
.premium-grid .premium-feature{padding:1.25rem;position:relative;overflow:hidden}
.premium-feature::after{content:"";position:absolute;inset:auto -40px -40px auto;width:120px;height:120px;background:radial-gradient(circle,rgba(255,228,92,.18),transparent 70%)}
.premium-icon{font-size:2rem;display:inline-flex;margin-bottom:.5rem}
.premium-unlock-card,.premium-status-card,.premium-callout-card{border:1px solid rgba(255,228,92,.22);box-shadow:0 20px 50px rgba(0,0,0,.18)}
.demo-code{display:inline-flex;padding:.65rem 1rem;margin:.3rem 0 1rem;border-radius:14px;background:rgba(255,228,92,.14);border:1px solid rgba(255,228,92,.28);font-weight:900;letter-spacing:.08em}
.premium-form{display:grid;gap:.75rem}.premium-form input,.premium-generator select,.premium-generator input,.smart-hint-lab input{width:100%;padding:.8rem 1rem;border-radius:14px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);color:inherit}
.premium-badge{background:rgba(255,255,255,.08)}.premium-badge.active{background:rgba(255,228,92,.20);color:#ffe45c}
.premium-tools{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}.premium-tool{padding:1rem;border-radius:18px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05)}
.premium-tool.locked{filter:saturate(.45);opacity:.72}.premium-tool.locked::after{content:"Premium locked";display:inline-flex;margin-top:.6rem;font-size:.8rem;padding:.25rem .55rem;border-radius:999px;background:rgba(255,255,255,.10)}
.premium-tool-panel{border:1px solid rgba(255,228,92,.22)}.premium-question{font-size:1.8rem;font-weight:900;margin:.8rem 0}.premium-sheet-list{display:grid;gap:.75rem;font-size:1.15rem}.stat-card{padding:1rem;border-radius:18px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}.stat-card strong{display:block;font-size:2rem}.stat-card span{color:var(--muted,#cfd8ff)}
.premium-mini-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;align-content:center}.premium-mini-list span{padding:.85rem 1rem;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);font-weight:800}
@media (max-width:1000px){.premium-tools{grid-template-columns:repeat(2,minmax(0,1fr))}.premium-mini-list{grid-template-columns:1fr}}
@media (max-width:700px){.premium-tools{grid-template-columns:1fr}.premium-grid{grid-template-columns:1fr}}
@media print{header,.footer,.hero,.premium-form,.hero-actions,.site-header,.nav-links,[data-close-tool]{display:none!important}.premium-tool-panel{display:block!important;box-shadow:none!important;border:0!important}.generated-sheet{font-size:18pt}}


/* Interactive Lab upgrade */
.interactive-preview-card,.interactive-command,.daily-quest-card,.fraction-lab,.speed-card,.reward-wheel-card,.avatar-lab{border-color:rgba(93,220,255,.22);box-shadow:0 24px 65px rgba(0,0,0,.20)}
.interactive-preview-card{background:radial-gradient(circle at top right,rgba(93,220,255,.15),transparent 35%),linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.035))}
.home-quest-widget{padding:1.1rem;border-radius:22px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13)}
.avatar-bubble{width:72px;height:72px;display:grid;place-items:center;border-radius:24px;background:linear-gradient(135deg,rgba(93,220,255,.18),rgba(139,92,246,.18));border:1px solid rgba(255,255,255,.16);font-size:2.2rem;box-shadow:0 16px 38px rgba(0,0,0,.18)}
.interactive-hero{background:radial-gradient(circle at 15% 10%,rgba(93,220,255,.18),transparent 32%),radial-gradient(circle at 85% 20%,rgba(139,92,246,.25),transparent 36%)}
.interactive-command{min-height:320px;display:grid;align-content:center}.lab-status-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem}.lab-status-grid div{padding:1rem;border-radius:18px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}.lab-status-grid span{display:block;color:var(--muted);font-size:.9rem}.lab-status-grid strong{display:block;font-size:1.35rem}.avatar-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:.6rem}.avatar-grid button{font-size:2rem;padding:.8rem;border-radius:18px;background:rgba(255,255,255,.06);color:white;border:1px solid rgba(255,255,255,.13);cursor:pointer}.avatar-grid button.active,.avatar-grid button:hover{border-color:var(--brand);background:rgba(93,220,255,.14);transform:translateY(-2px)}
.daily-quest-box,.daily-options{display:grid;gap:.75rem}.daily-question{font-size:1.45rem;font-weight:900;color:white}.daily-options{grid-template-columns:repeat(4,minmax(0,1fr))}.daily-options .option{text-align:center}.fraction-builder-area{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:1rem;align-items:center}.fraction-pieces{display:grid;gap:.55rem;min-height:110px}.fraction-piece{min-height:80px;border-radius:18px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);color:white;font-size:2rem;cursor:pointer}.fraction-piece.shaded{background:linear-gradient(135deg,#5ddcff,#8b5cf6);box-shadow:0 16px 34px rgba(93,220,255,.20)}.fraction-big{font-size:3rem;font-weight:900;line-height:1}.fraction-readout{padding:1rem;border-radius:20px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13)}.fraction-lab select,.place-value-lab input,.equation-lab input{padding:.8rem 1rem;border-radius:14px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);color:white}.place-value-output{display:grid;grid-template-columns:repeat(3,1fr);gap:.8rem;margin-top:1rem}.pv-card{padding:1rem;border-radius:18px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);min-height:140px}.pv-card strong{font-size:2.2rem;display:block}.pv-card span{color:var(--muted)}.pv-blocks{word-break:break-word;color:#93c5fd;line-height:1.7}.balance-board{display:grid;grid-template-columns:1fr auto 1fr;gap:.6rem;align-items:center;margin:1rem 0}.balance-pan{min-height:86px;border-radius:20px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);display:grid;place-items:center;font-size:1.6rem;font-weight:900}.balance-pivot{font-size:2.4rem}.timer-pill{font-size:1.4rem;font-weight:900;padding:.5rem .85rem;border-radius:999px;background:rgba(255,228,92,.14);border:1px solid rgba(255,228,92,.26);color:#ffe45c}.speed-question{font-size:clamp(2rem,5vw,4rem);font-weight:900;text-align:center;margin:1rem 0}.wheel-wrap{position:relative;display:grid;place-items:center;min-height:320px}.reward-wheel{width:260px;height:260px;border-radius:50%;border:10px solid rgba(255,255,255,.14);background:conic-gradient(#5ddcff 0 60deg,#8b5cf6 60deg 120deg,#22c55e 120deg 180deg,#f59e0b 180deg 240deg,#ef4444 240deg 300deg,#38bdf8 300deg 360deg);display:grid;place-items:center;position:relative;transition:transform 1.1s cubic-bezier(.15,.8,.2,1);box-shadow:0 18px 55px rgba(0,0,0,.25)}.reward-wheel span{position:absolute;font-weight:900;font-size:.8rem;text-shadow:0 1px 2px rgba(0,0,0,.4)}.reward-wheel span:nth-child(1){transform:rotate(30deg) translateY(-95px)}.reward-wheel span:nth-child(2){transform:rotate(90deg) translateY(-95px)}.reward-wheel span:nth-child(3){transform:rotate(150deg) translateY(-95px)}.reward-wheel span:nth-child(4){transform:rotate(210deg) translateY(-95px)}.reward-wheel span:nth-child(5){transform:rotate(270deg) translateY(-95px)}.reward-wheel span:nth-child(6){transform:rotate(330deg) translateY(-95px)}.wheel-pointer{position:absolute;top:16px;font-size:2rem;color:#ffe45c;filter:drop-shadow(0 4px 8px rgba(0,0,0,.35))}.lab-toast{background:linear-gradient(135deg,#5ddcff,#22c55e)!important;color:#04111f!important}.option:disabled{opacity:.65;cursor:not-allowed}
@media(max-width:900px){.fraction-builder-area,.place-value-output,.daily-options{grid-template-columns:1fr}.avatar-grid{grid-template-columns:repeat(4,1fr)}.lab-status-grid{grid-template-columns:1fr}.wheel-wrap{min-height:280px}}

/* Premium upgrade v2 */
.premium-landing .premium-safe-note{margin-top:1rem;padding:.8rem 1rem;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12)}
.pricing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.price-card{padding:1.4rem;border-radius:24px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.055);display:grid;gap:.8rem;align-content:start}
.price-card.featured{border-color:rgba(255,228,92,.35);box-shadow:0 24px 70px rgba(255,175,60,.12),0 18px 45px rgba(0,0,0,.2);background:linear-gradient(180deg,rgba(255,228,92,.12),rgba(168,85,247,.12))}
.price{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:900;margin:.25rem 0;color:#ffe45c}
.check-list{display:grid;gap:.55rem;list-style:none;margin:0 0 .8rem;padding:0}
.check-list li{position:relative;padding-left:1.7rem}.check-list li:before{content:'✓';position:absolute;left:0;top:0;color:#65f2a9;font-weight:900}
.small-code{display:inline-flex;font-size:.95rem;margin:.35rem .35rem 0 0;padding:.5rem .7rem}
.premium-tool{transition:transform .18s ease, box-shadow .18s ease, opacity .18s ease}.premium-tool:not(.locked):hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.22)}
.premium-feedback{margin-top:1rem;padding:.9rem 1rem;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12)}
.premium-feedback.good{background:rgba(34,197,94,.14);border-color:rgba(34,197,94,.32)}.premium-feedback.bad{background:rgba(248,113,113,.14);border-color:rgba(248,113,113,.32)}
.boss-score-row{display:flex;flex-wrap:wrap;gap:.75rem;margin-bottom:1rem}.boss-score-row span{padding:.5rem .75rem;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);font-weight:800}
.adventure-card{text-decoration:none;transition:transform .18s ease}.adventure-card:hover{transform:translateY(-2px)}
.mini-certificate{margin-top:1rem;padding:1.4rem;border-radius:24px;text-align:center;background:linear-gradient(135deg,#ffffff,#e0f2fe);color:#0f172a;border:5px double #0ea5e9}.mini-certificate h1{font-size:2rem;color:#075985}.mini-certificate h2{color:#0f172a}
.premium-certificate-tool input{width:100%;padding:.8rem 1rem;border-radius:14px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);color:inherit;margin:.35rem 0 1rem}
@media(max-width:800px){.pricing-grid{grid-template-columns:1fr}.boss-score-row{display:grid}}


/* Better Premium Worksheet Studio */
.upgraded-generator{display:grid;gap:1rem}
.worksheet-control-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.85rem;align-items:end}
.worksheet-control-grid label{display:grid;gap:.35rem;font-weight:700}.worksheet-control-grid input,.worksheet-control-grid select{width:100%;padding:.8rem 1rem;border-radius:14px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);color:inherit}.worksheet-control-grid .check-row{display:flex;align-items:center;gap:.5rem;padding:.85rem 1rem;border-radius:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}.worksheet-control-grid .check-row input{width:auto}
.upgraded-sheet{margin-top:1rem}.premium-print-sheet{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.045));border:1px solid rgba(255,255,255,.14);border-radius:24px;padding:1.1rem}.ws-sheet-head{display:flex;justify-content:space-between;gap:1rem;align-items:start;border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:1rem;margin-bottom:1rem}.ws-kicker{text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:#ffe45c;margin:0 0 .3rem}.ws-score-badge{padding:.6rem .9rem;border-radius:999px;background:rgba(255,228,92,.14);border:1px solid rgba(255,228,92,.3);font-weight:900;color:#ffe45c;white-space:nowrap}.ws-mission-box{padding:.8rem 1rem;border-radius:16px;background:rgba(93,220,255,.10);border:1px solid rgba(93,220,255,.24);margin-bottom:1rem}.upgraded-list{display:grid;gap:.9rem}.worksheet-question-row{display:grid;grid-template-columns:42px 1fr;gap:.8rem;padding:.9rem;border-radius:18px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.11);break-inside:avoid}.worksheet-question-row.correct{border-color:rgba(34,197,94,.4);background:rgba(34,197,94,.08)}.worksheet-question-row.wrong{border-color:rgba(248,113,113,.42);background:rgba(248,113,113,.08)}.ws-number{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#5ddcff,#8b5cf6);font-weight:900;color:white}.ws-question{display:grid;gap:.55rem}.ws-answer-line{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}.ws-answer-line input{max-width:260px;padding:.7rem .85rem;border-radius:12px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);color:inherit}.ws-feedback{font-size:.95rem;color:var(--muted,#cfd8ff)}.ws-feedback.good{color:#86efac}.ws-feedback.bad{color:#fecaca}.ws-fraction-visual{display:grid;grid-auto-flow:column;gap:3px;max-width:360px;padding:.25rem;border-radius:12px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12)}.ws-bar-piece{height:24px;background:rgba(255,255,255,.12);border-radius:6px}.ws-bar-piece.on{background:linear-gradient(135deg,#ffe45c,#5ddcff)}.answer-key-box{margin-top:1rem;padding:1rem;border-radius:18px;background:rgba(255,228,92,.08);border:1px solid rgba(255,228,92,.22)}.answer-key-box summary{cursor:pointer;font-weight:900}.answer-key-box ol{display:grid;gap:.45rem;margin-bottom:0}.answer-key-box span{color:var(--muted,#cfd8ff);margin-left:.5rem}.ws-print-tip{margin-top:1rem}
@media(max-width:1050px){.worksheet-control-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:650px){.worksheet-control-grid{grid-template-columns:1fr}.ws-sheet-head{display:grid}.worksheet-question-row{grid-template-columns:1fr}.ws-number{width:36px;height:36px}.ws-answer-line input{max-width:100%;width:100%}}
@media print{.worksheet-control-grid,.premium-generator>.hero-actions,.ws-feedback,.ws-print-tip,.answer-key-box:not([open]){display:none!important}.premium-print-sheet{background:white!important;color:#111827!important;border:0!important;padding:0!important}.worksheet-question-row{background:white!important;color:#111827!important;border:1px solid #d1d5db!important}.ws-number{background:#111827!important;color:white!important}.ws-kicker,.ws-score-badge{color:#111827!important}.ws-mission-box{background:#f3f4f6!important;color:#111827!important;border:1px solid #d1d5db!important}.ws-answer-line input{border:0!important;border-bottom:1px solid #111827!important;border-radius:0!important;background:white!important;color:#111827!important}.ws-fraction-visual{border:1px solid #d1d5db!important;background:white!important}.ws-bar-piece{background:#e5e7eb!important}.ws-bar-piece.on{background:#9ca3af!important}.answer-key-box{background:#f9fafb!important;color:#111827!important;border:1px solid #d1d5db!important}}


/* Games Hub upgrade - inspired by game-based maths sites */
.arcade-hero{position:relative}.arcade-stats{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1rem}.arcade-stats span{padding:.55rem .85rem;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);font-weight:800}.arcade-layout{display:grid;grid-template-columns:280px 1fr;gap:1rem;align-items:start}.arcade-side{position:sticky;top:92px}.arcade-label{display:grid;gap:.35rem;font-weight:800;margin:.75rem 0}.arcade-label select,.arcade-label input{width:100%;padding:.75rem .85rem;border-radius:14px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);color:inherit}.arcade-mini-note{padding:.8rem;border-radius:16px;background:rgba(93,220,255,.10);border:1px solid rgba(93,220,255,.22);font-size:.95rem;color:var(--muted,#cfd8ff);margin-top:1rem}.arcade-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.arcade-game-card{appearance:none;text-align:left;border:1px solid rgba(255,255,255,.13);background:linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.045));color:inherit;border-radius:24px;padding:1rem;text-decoration:none;display:grid;gap:.45rem;min-height:190px;cursor:pointer;box-shadow:0 15px 35px rgba(0,0,0,.16);transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}.arcade-game-card:hover,.arcade-game-card:focus-visible{transform:translateY(-4px);box-shadow:0 22px 55px rgba(0,0,0,.23);border-color:rgba(93,220,255,.45);outline:none}.arcade-game-card>span{font-size:2rem}.arcade-game-card h3{margin:0}.arcade-game-card p{margin:0;color:var(--muted,#cfd8ff);line-height:1.45}.arcade-game-card small{color:#ffe45c;font-weight:800}.arcade-panels{display:grid;gap:1rem}.arcade-panel{display:none}.arcade-panel.active{display:block}.sprint-controls{display:flex;gap:1rem;flex-wrap:wrap;align-items:end}.sprint-controls label{display:grid;gap:.35rem;font-weight:800}.sprint-controls select{padding:.75rem .85rem;border-radius:14px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);color:inherit}.race-track{position:relative;display:grid;gap:.7rem;margin:1.2rem 0 1.4rem;padding-right:82px}.race-lane{position:relative;height:54px;border-radius:999px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);overflow:hidden}.race-lane:after{content:'';position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 42px,rgba(255,255,255,.06) 42px 44px)}.race-lane.ghost{opacity:.82}.race-ship{position:absolute;left:0;top:50%;transform:translate(-2px,-50%);font-size:2rem;z-index:2;transition:left .3s ease}.finish-line{position:absolute;right:0;top:0;bottom:0;width:74px;display:grid;place-items:center;border-radius:16px;background:rgba(255,228,92,.13);border:1px solid rgba(255,228,92,.30);font-weight:900;color:#ffe45c}.logic-target{display:grid;place-items:center;margin:1rem auto;padding:1rem;border-radius:24px;background:linear-gradient(135deg,rgba(93,220,255,.14),rgba(139,92,246,.14));border:1px solid rgba(255,255,255,.14);max-width:260px}.logic-target span{text-transform:uppercase;letter-spacing:.08em;color:var(--muted,#cfd8ff);font-weight:800}.logic-target strong{font-size:3rem}.logic-numbers{display:flex;justify-content:center;gap:.6rem;flex-wrap:wrap;margin:1rem 0}.logic-numbers span{display:grid;place-items:center;width:54px;height:54px;border-radius:18px;background:linear-gradient(135deg,#5ddcff,#8b5cf6);font-size:1.5rem;font-weight:900;color:white}.quest-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.quest-card{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:inherit;border-radius:22px;padding:1rem;display:grid;gap:.45rem;cursor:pointer;text-align:left}.quest-card:hover{border-color:rgba(255,228,92,.35);transform:translateY(-2px)}.quest-card span{font-size:2rem}.quest-card small{color:#ffe45c;letter-spacing:.15em}.quest-play{margin-top:1rem;padding:1rem;border-radius:22px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.12)}.inspiration-grid,.games-preview-icons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem}.inspiration-grid span,.games-preview-icons span{padding:.8rem 1rem;border-radius:16px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);font-weight:800}.games-hub-preview{background:linear-gradient(135deg,rgba(93,220,255,.12),rgba(139,92,246,.13));border:1px solid rgba(255,255,255,.14)}
@media(max-width:1050px){.arcade-layout{grid-template-columns:1fr}.arcade-side{position:relative;top:0}.arcade-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.inspiration-grid,.games-preview-icons{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.arcade-card-grid,.quest-board,.inspiration-grid,.games-preview-icons{grid-template-columns:1fr}.race-track{padding-right:0}.finish-line{position:relative;width:auto;height:40px}.sprint-controls{display:grid}.arcade-game-card{min-height:0}}

/* Arcade 2.0 - more game-like Games Hub */
.arcade2-hero{padding:4.2rem 0 2.2rem;background:radial-gradient(circle at 12% 12%,rgba(126,85,255,.38),transparent 30%),radial-gradient(circle at 84% 10%,rgba(33,209,255,.22),transparent 32%),linear-gradient(180deg,rgba(8,10,42,.96),rgba(11,14,54,.9));overflow:hidden}
.arcade2-hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:2rem;align-items:center}.arcade2-hero h1{font-size:clamp(2.4rem,5vw,5rem);line-height:.95;margin:.5rem 0}.arcade2-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.3rem}.arcade2-console{position:relative;background:linear-gradient(180deg,rgba(30,38,92,.98),rgba(11,15,45,.98));border:1px solid rgba(255,255,255,.16);box-shadow:0 25px 80px rgba(0,0,0,.35), inset 0 0 40px rgba(92,64,255,.2)}
.arcade-screen{position:relative;min-height:260px;border-radius:22px;background:radial-gradient(circle at 50% 20%,rgba(0,255,255,.22),transparent 34%),linear-gradient(180deg,#080b29,#101a55);display:grid;place-items:center;overflow:hidden;border:1px solid rgba(255,255,255,.14)}.pixel-stars:before,.pixel-stars:after{content:"";position:absolute;inset:0;background-image:radial-gradient(#fff 1px,transparent 1px);background-size:22px 22px;opacity:.22;animation:starDrift 18s linear infinite}.pixel-stars:after{background-size:35px 35px;opacity:.14;animation-duration:28s}.arcade-avatar{font-size:4.5rem;filter:drop-shadow(0 0 28px rgba(73,214,255,.55));animation:floaty 2.2s ease-in-out infinite}.arcade-title{font-weight:900;letter-spacing:.14em;color:#fff;text-shadow:0 0 18px rgba(255,255,255,.4)}.arcade-level{font-size:1.15rem}.xp-bar{height:13px;border-radius:999px;background:rgba(255,255,255,.12);width:min(300px,90%);overflow:hidden;border:1px solid rgba(255,255,255,.12)}.xp-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,#42e8ff,#a777ff,#ffd452);border-radius:inherit;transition:width .4s ease}.arcade2-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:.55rem;margin-top:1rem}.arcade2-stats span,.game-status span{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.07);padding:.55rem .7rem;border-radius:999px;font-size:.95rem}.avatar-row{display:flex;justify-content:center;gap:.4rem;margin-top:.8rem}.avatar-row button{font-size:1.5rem;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.08);border-radius:14px;padding:.45rem .55rem;cursor:pointer}.avatar-row button:hover{transform:translateY(-2px);background:rgba(255,255,255,.15)}
.arcade2-map{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035))}.zone-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.zone-card{min-height:150px;text-align:left;border-radius:24px;padding:1rem;border:1px solid rgba(255,255,255,.14);background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.045));color:inherit;cursor:pointer;box-shadow:0 15px 38px rgba(0,0,0,.16);transition:transform .18s ease,box-shadow .18s ease}.zone-card:hover{transform:translateY(-4px) scale(1.01);box-shadow:0 22px 55px rgba(0,0,0,.26)}.zone-card span{font-size:2.2rem;display:block}.zone-card strong{display:block;font-size:1.1rem;margin:.45rem 0}.zone-card small{color:var(--muted,#cfd8ff)}
.game-zone{scroll-margin-top:90px}.game-shell{position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.15);box-shadow:0 24px 60px rgba(0,0,0,.2)}.game-top{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:1rem}.game-status{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:flex-end}.game-question{font-size:clamp(1.8rem,4vw,3.5rem);font-weight:900;text-align:center;margin:1rem 0;padding:1rem;border-radius:22px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}
.asteroid-shell{background:radial-gradient(circle at 25% 10%,rgba(115,74,255,.25),transparent 30%),linear-gradient(180deg,rgba(10,15,52,.98),rgba(9,10,35,.98))}.asteroid-field{position:relative;min-height:360px;border-radius:26px;overflow:hidden;background:radial-gradient(circle at 50% 120%,rgba(47,147,255,.18),transparent 45%),linear-gradient(180deg,#07102f,#10144a);border:1px solid rgba(255,255,255,.12)}.asteroid-field:before{content:"";position:absolute;inset:0;background-image:radial-gradient(#fff 1px,transparent 1px);background-size:24px 24px;opacity:.18;animation:starDrift 20s linear infinite}.field-message{position:absolute;inset:0;display:grid;place-items:center;font-size:2rem;font-weight:900}.asteroid-rock{position:absolute;z-index:2;width:74px;height:74px;border-radius:50%;border:2px solid rgba(255,255,255,.25);background:radial-gradient(circle at 30% 25%,#fff7,#0000 22%),linear-gradient(135deg,#7f7bff,#251454);color:#fff;font-weight:900;font-size:1.25rem;cursor:pointer;box-shadow:0 12px 28px rgba(0,0,0,.32);animation:drift 3.5s ease-in-out infinite alternate}.asteroid-rock:hover{transform:scale(1.08)}.asteroid-rock.boom{background:linear-gradient(135deg,#ffd66e,#ff4e83);animation:explode .28s ease forwards}.asteroid-rock.wrong{background:linear-gradient(135deg,#ff4e4e,#4a0e19)}
.tower-stage{min-height:230px;display:grid;grid-template-columns:1fr auto 1fr;align-items:end;gap:1rem;border-radius:26px;padding:1.3rem;background:linear-gradient(180deg,rgba(95,66,255,.14),rgba(12,14,54,.35));border:1px solid rgba(255,255,255,.12)}.fighter{text-align:center;font-size:4rem;filter:drop-shadow(0 16px 28px rgba(0,0,0,.3));animation:floaty 2.5s ease-in-out infinite}.fighter.monster{animation:monsterBounce 1.5s ease-in-out infinite}.mini-health{height:13px;background:rgba(255,255,255,.12);border-radius:999px;overflow:hidden;border:1px solid rgba(255,255,255,.12)}.mini-health span{display:block;height:100%;width:100%;background:linear-gradient(90deg,#5dff9d,#18c9ff);transition:width .3s}.mini-health.monster span{background:linear-gradient(90deg,#ff4e83,#ffd66e)}.spell-bolt{font-size:2rem;opacity:.25}.spell-bolt.cast{animation:spellCast .45s ease}
.race2-track{border-radius:26px;padding:1rem;background:linear-gradient(180deg,#0b133d,#1c1a55);border:1px solid rgba(255,255,255,.12)}.race-road{position:relative;height:150px;border-radius:20px;background:repeating-linear-gradient(90deg,rgba(255,255,255,.08) 0 16px,transparent 16px 32px),linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.03));overflow:hidden}.racer{position:absolute;left:0;transition:left .25s ease;font-size:2.4rem}.racer.player{top:28px}.racer.ghost{top:88px}.race2-finish{position:absolute;right:8px;top:0;bottom:0;writing-mode:vertical-rl;display:grid;place-items:center;font-weight:900;letter-spacing:.12em;background:rgba(255,255,255,.14);padding:.4rem;border-radius:12px}
.treasure-door{display:grid;gap:1rem;place-items:center;border-radius:26px;padding:1.5rem;background:radial-gradient(circle at 50% 5%,rgba(255,214,90,.25),transparent 32%),linear-gradient(180deg,rgba(76,44,14,.52),rgba(27,18,47,.6));border:1px solid rgba(255,255,255,.12)}.door-lock{font-size:5rem}.logic-numbers{display:flex;gap:.7rem;flex-wrap:wrap;justify-content:center}.logic-numbers span{font-size:1.35rem;font-weight:900;min-width:48px;text-align:center;border-radius:14px;padding:.65rem;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.14)}
.pizza-game{display:grid;grid-template-columns:minmax(260px,1fr) minmax(220px,.65fr);gap:1rem;align-items:center}.pizza-pan{display:grid;grid-template-columns:repeat(var(--slices,4),minmax(44px,1fr));gap:.5rem;padding:1rem;border-radius:26px;background:linear-gradient(180deg,#3d1a14,#1a102f);border:1px solid rgba(255,255,255,.12)}.pizza-slice{aspect-ratio:1;border-radius:18px;border:2px solid rgba(255,255,255,.16);background:linear-gradient(135deg,#f5c065,#bf5b2c);font-weight:900;color:#35150d;cursor:pointer}.pizza-slice.on{background:linear-gradient(135deg,#ffe28c,#ff6d8f);box-shadow:0 0 0 4px rgba(255,255,255,.12),0 0 25px rgba(255,189,85,.4)}.pizza-controls{display:grid;gap:.8rem}.pizza-order{text-align:center;font-size:1.6rem;font-weight:900;margin:.6rem 0}
.boss-arena{display:grid;place-items:center;border-radius:26px;min-height:220px;background:radial-gradient(circle at 50% 30%,rgba(255,63,97,.25),transparent 36%),linear-gradient(180deg,#210b36,#0d112f);border:1px solid rgba(255,255,255,.12)}.boss-dragon{font-size:6rem;animation:monsterBounce 1.25s ease-in-out infinite}.boss-health{width:min(520px,90%);height:18px;background:rgba(255,255,255,.12);border-radius:999px;overflow:hidden;border:1px solid rgba(255,255,255,.14)}.boss-health span{display:block;height:100%;width:100%;background:linear-gradient(90deg,#ff315c,#ffd452);transition:width .3s}.badge-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:.8rem}.badge-tile{text-align:center;border-radius:18px;padding:1rem;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);opacity:.55}.badge-tile.earned{opacity:1;background:linear-gradient(180deg,rgba(255,216,88,.18),rgba(126,85,255,.13));box-shadow:0 12px 32px rgba(0,0,0,.16)}.badge-tile span{font-size:2rem;display:block}.badge-tile strong{display:block}.arcade-confetti{position:fixed;left:50%;top:18%;transform:translateX(-50%);z-index:9999;padding:1rem 1.4rem;border-radius:18px;background:linear-gradient(135deg,#ffe56d,#ff5f98,#8f6dff);color:#15072e;font-weight:1000;font-size:1.4rem;box-shadow:0 22px 70px rgba(0,0,0,.4);animation:popPrize 1.4s ease forwards;pointer-events:none}.battle-feedback.good{border-color:rgba(93,255,157,.45);background:rgba(42,212,125,.12)}.battle-feedback.bad{border-color:rgba(255,79,120,.45);background:rgba(255,79,120,.12)}
@keyframes starDrift{from{transform:translateY(0)}to{transform:translateY(80px)}}@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes drift{0%{transform:translate(0,0) rotate(-5deg)}100%{transform:translate(18px,-16px) rotate(9deg)}}@keyframes explode{to{transform:scale(1.7);opacity:0}}@keyframes monsterBounce{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-8px) scale(1.04)}}@keyframes spellCast{0%{transform:translateX(-70px);opacity:0}50%{opacity:1}100%{transform:translateX(70px);opacity:0}}@keyframes popPrize{0%{transform:translateX(-50%) scale(.7);opacity:0}20%{opacity:1;transform:translateX(-50%) scale(1.05)}100%{transform:translateX(-50%) translateY(-40px) scale(.98);opacity:0}}
@media (max-width:900px){.arcade2-hero-grid,.pizza-game{grid-template-columns:1fr}.zone-grid,.badge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.game-top{display:block}.game-status{justify-content:flex-start;margin-top:.7rem}.asteroid-field{min-height:300px}.arcade2-hero h1{font-size:2.5rem}}
@media (max-width:560px){.zone-grid,.badge-grid,.arcade2-stats{grid-template-columns:1fr}.tower-stage{grid-template-columns:1fr}.spell-bolt{display:none}.asteroid-rock{width:60px;height:60px}.pizza-pan{grid-template-columns:repeat(2,minmax(44px,1fr))!important}}


/* Fraction Planet Adventure */
.fraction-adventure-page .section{padding:2rem 0}
.fraction-hero{padding:4rem 0 2.5rem;background:radial-gradient(circle at 78% 12%,rgba(255,202,40,.18),transparent 28%),radial-gradient(circle at 16% 20%,rgba(93,220,255,.18),transparent 30%)}
.fraction-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:2rem;align-items:center}
.fraction-hero h1{font-size:clamp(2.3rem,6vw,5rem);line-height:1.02;margin:.4rem 0 1rem}
.fraction-player-card{display:flex;align-items:center;gap:1rem;padding:1rem;border:1px solid var(--line);background:rgba(255,255,255,.06);border-radius:22px;margin:1.2rem 0;max-width:540px}
.fraction-avatar{width:56px;height:56px;border-radius:18px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;font-size:2rem;box-shadow:0 16px 35px rgba(93,220,255,.2)}
.fraction-progress-line{height:10px;width:min(340px,60vw);border-radius:99px;background:rgba(255,255,255,.12);overflow:hidden;margin:.35rem 0}
.fraction-progress-line span{display:block;height:100%;width:0;background:linear-gradient(90deg,#22c55e,#5ddcff,#a78bfa);border-radius:99px}
.fraction-world-card{padding:1.4rem;text-align:center;min-height:360px;display:grid;place-items:center;align-content:center;overflow:hidden}
.planet-orbit{position:relative;width:280px;height:230px;margin:auto}
.planet{position:absolute;display:grid;place-items:center;border-radius:50%;box-shadow:0 18px 50px rgba(0,0,0,.25);animation:floaty 4s ease-in-out infinite}
.planet.big{font-size:5.5rem;left:70px;top:55px;width:140px;height:140px;background:rgba(255,255,255,.08)}
.planet.p1{font-size:2.7rem;left:20px;top:20px;animation-delay:.4s}
.planet.p2{font-size:2.7rem;right:10px;top:35px;animation-delay:.8s}
.planet.p3{font-size:2.8rem;right:55px;bottom:4px;animation-delay:1.2s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.fraction-map{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.85rem}
.fraction-level{border:1px solid var(--line);border-radius:20px;padding:1rem;background:rgba(255,255,255,.06);color:var(--text);text-align:left;cursor:pointer;transition:.2s transform,.2s background,.2s border-color}
.fraction-level:hover:not(:disabled),.fraction-level.active{transform:translateY(-3px);border-color:rgba(93,220,255,.6);background:rgba(93,220,255,.12)}
.fraction-level.done{border-color:rgba(34,197,94,.55);background:rgba(34,197,94,.12)}
.fraction-level.locked{opacity:.5;cursor:not-allowed}
.fraction-level span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));font-weight:900;margin-bottom:.6rem}
.fraction-level strong{display:block}.fraction-level small{display:block;color:var(--muted);line-height:1.35}
.fraction-game-shell{display:grid;grid-template-columns:320px 1fr;gap:1rem;align-items:stretch}
.fraction-side-panel{padding:1rem}
.fraction-stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem;margin:1rem 0}
.fraction-stats-grid div{padding:.7rem;border-radius:16px;background:rgba(255,255,255,.06);text-align:center}
.fraction-stats-grid strong{display:block;font-size:1.2rem}.fraction-stats-grid small{color:var(--muted)}
.fraction-hint-box{padding:1rem;border-radius:18px;background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.25);margin:1rem 0;color:#ffedd5}
.fraction-play-card{padding:1.1rem;position:relative;overflow:hidden;min-height:560px}
.fraction-topline{display:flex;justify-content:space-between;gap:.7rem;align-items:center;flex-wrap:wrap;margin-bottom:1rem}
.fraction-mission-text{font-size:clamp(1.35rem,3vw,2.15rem);font-weight:900;text-align:center;margin:1rem 0;color:#fff}
.fraction-stage{min-height:300px;display:grid;place-items:center;padding:1rem;border-radius:26px;background:radial-gradient(circle at center,rgba(93,220,255,.10),rgba(255,255,255,.03));border:1px solid rgba(255,255,255,.08)}
.fraction-controls{margin-top:1rem;display:grid;gap:.8rem;justify-items:center}
.fraction-feedback{margin-top:1rem;padding:1rem;border-radius:18px;background:rgba(255,255,255,.06);border:1px solid var(--line);text-align:center;font-weight:700}
.fraction-feedback.good{background:rgba(34,197,94,.13);border-color:rgba(34,197,94,.4)}
.fraction-feedback.bad{background:rgba(239,68,68,.13);border-color:rgba(239,68,68,.4)}
.pizza-game{display:grid;place-items:center;gap:1rem}
.pizza-grid{width:min(330px,78vw);height:min(330px,78vw);border-radius:50%;display:grid;gap:6px;padding:8px;background:#78350f;box-shadow:inset 0 0 0 12px #b45309,0 20px 60px rgba(0,0,0,.28);overflow:hidden}
.pizza-grid.den-2{grid-template-columns:repeat(2,1fr)}
.pizza-grid.den-3{grid-template-columns:repeat(3,1fr)}
.pizza-grid.den-4{grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr)}
.pizza-grid.den-5,.pizza-grid.den-6{grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(2,1fr)}
.pizza-slice{border:0;border-radius:20px;background:#facc15;color:#7c2d12;font-weight:900;font-size:1.25rem;cursor:pointer;box-shadow:inset 0 -8px 0 rgba(0,0,0,.12);transition:.16s transform,.16s background}
.pizza-slice:hover{transform:scale(1.03)}
.pizza-slice.selected{background:#fb7185;color:white;box-shadow:inset 0 -8px 0 rgba(0,0,0,.18),0 0 0 4px rgba(255,255,255,.15)}
.fraction-big-label{font-size:2rem;font-weight:900;padding:.45rem 1rem;border-radius:16px;background:rgba(255,255,255,.08)}
.fraction-bar-wrap{display:grid;gap:.45rem;text-align:center;width:min(420px,80vw)}
.fraction-bar{display:grid;gap:4px;height:48px;padding:4px;border:1px solid rgba(255,255,255,.18);border-radius:14px;background:rgba(255,255,255,.06);overflow:hidden}
.fraction-bar span{border-radius:10px;background:rgba(255,255,255,.12)}
.fraction-bar span.on{background:linear-gradient(180deg,#facc15,#fb7185)}
.fraction-option-row{display:flex;gap:.7rem;flex-wrap:wrap;justify-content:center}
.fraction-card-option{border:1px solid var(--line);background:rgba(255,255,255,.08);color:white;border-radius:18px;padding:.85rem 1rem;min-width:110px;font-size:1.05rem;font-weight:900;cursor:pointer;transition:.18s transform,.18s background}
.fraction-card-option:hover,.fraction-card-option.selected{transform:translateY(-2px);background:rgba(93,220,255,.18);border-color:rgba(93,220,255,.5)}
.match-stage{display:grid;place-items:center}
.rocket-race-stage{display:grid;gap:1rem;width:100%}
.rocket-lane{display:grid;grid-template-columns:90px 1fr;align-items:center;gap:1rem}
.rocket{font-size:2.5rem;transition:transform .7s cubic-bezier(.2,.8,.2,1)}
.monster-stage{display:grid;place-items:center;gap:1rem;text-align:center}
.friendly-monster{font-size:6rem;filter:drop-shadow(0 18px 25px rgba(0,0,0,.25));animation:monsterBounce 1.5s infinite}
@keyframes monsterBounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.monster-speech{padding:.8rem 1rem;border-radius:18px;background:rgba(255,255,255,.10);border:1px solid var(--line);font-size:1.2rem}
.boss-calc-stage{display:grid;place-items:center;gap:1rem;text-align:center}
.dragon{font-size:6.2rem;animation:dragonWiggle 1.3s infinite}
@keyframes dragonWiggle{0%,100%{transform:rotate(-2deg)}50%{transform:rotate(2deg)}}
.boss-question{font-size:2rem;font-weight:900;padding:1rem 1.2rem;border-radius:20px;background:rgba(255,255,255,.09)}
.fraction-sparkle{position:absolute;font-size:4rem;animation:sparklePop .8s forwards;pointer-events:none}
@keyframes sparklePop{0%{transform:scale(.2) translateY(20px);opacity:0}40%{opacity:1}100%{transform:scale(1.3) translateY(-60px);opacity:0}}
.fraction-victory{text-align:center;display:grid;gap:.7rem;place-items:center}.fraction-victory>div{font-size:5rem}
@media(max-width:900px){.fraction-hero-grid,.fraction-game-shell{grid-template-columns:1fr}.fraction-map{grid-template-columns:1fr 1fr}.fraction-side-panel{order:2}.fraction-play-card{min-height:480px}}
@media(max-width:620px){.fraction-map{grid-template-columns:1fr}.rocket-lane{grid-template-columns:60px 1fr}.fraction-world-card{min-height:280px}.planet-orbit{transform:scale(.82)}}

/* Fraction adventure homepage callout */
.fraction-callout-card{display:grid;grid-template-columns:1.3fr .7fr;gap:1rem;align-items:center;background:linear-gradient(135deg,rgba(93,220,255,.12),rgba(139,92,246,.14));overflow:hidden}
.fraction-callout-icons{display:grid;grid-template-columns:repeat(2,1fr);gap:.7rem;text-align:center}.fraction-callout-icons span{font-size:3rem;padding:1rem;border-radius:22px;background:rgba(255,255,255,.08);animation:floaty 3.5s infinite}.fraction-callout-icons span:nth-child(2){animation-delay:.4s}.fraction-callout-icons span:nth-child(3){animation-delay:.8s}.fraction-callout-icons span:nth-child(4){animation-delay:1.2s}
@media(max-width:800px){.fraction-callout-card{grid-template-columns:1fr}.fraction-callout-icons span{font-size:2.4rem}}


/* Uploaded React fraction mini game wrapper */
.fraction-react-shell{background:linear-gradient(180deg, rgba(255,248,240,.98), rgba(255,236,210,.96)); overflow:hidden}
.fraction-react-shell #fraction-game-root{min-height:520px}

/* Kid-friendly Games Hub inspired by uploaded fraction game */
.playroom-page{background:linear-gradient(170deg,#fff8f0 0%,#ffecd2 45%,#fce4cc 100%);color:#5a3e28;font-family:'Fredoka','Comic Sans MS','Segoe UI',system-ui,sans-serif}
.playroom-hero{padding:3rem 0 2rem;background:radial-gradient(circle at 15% 15%,rgba(255,217,61,.55),transparent 30%),radial-gradient(circle at 85% 20%,rgba(107,203,119,.25),transparent 28%)}
.playroom-hero h1{font-size:clamp(2.4rem,6vw,4.8rem);line-height:.98;margin:.45rem 0;color:#5a3e28;text-shadow:3px 3px 0 #f7d794}
.playroom-hero .lead{color:#6d5a45;font-size:1.18rem;max-width:62ch}
.playroom-hero-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:2rem;align-items:center}
.playroom-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.2rem}
.playroom-player-card{background:rgba(255,255,255,.85);border:4px solid #e8d5c4;border-radius:28px;padding:1.2rem;text-align:center;box-shadow:0 16px 38px rgba(180,130,80,.15);position:relative;overflow:hidden}
.playroom-player-card:before{content:"";position:absolute;inset:-40%;background:conic-gradient(from 120deg,transparent,rgba(255,217,61,.22),transparent 35%);animation:spinSlow 7s linear infinite}
.playroom-player-card>*{position:relative;z-index:1}.player-avatar{font-size:4.2rem;animation:bob 2.2s ease-in-out infinite}.playroom-player-card h2{margin:.2rem 0 .8rem;color:#5a3e28}.playroom-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:.55rem}.playroom-stats span{background:#fff;border:2px solid #e8d5c4;border-radius:16px;padding:.55rem;font-weight:700}.play-xp{height:12px;background:#e8d5c4;border-radius:99px;margin:1rem 0;overflow:hidden}.play-xp span{display:block;height:100%;background:linear-gradient(90deg,#f7d794,#f5a623);width:0%;transition:width .4s ease}.kid-avatar-row{justify-content:center}.kid-avatar-row button{font-size:1.4rem;background:#fff;border:2px solid #e8d5c4;border-radius:14px;padding:.4rem .55rem;cursor:pointer}
.playroom-title-row{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:1rem}.playroom-title-row h2{color:#5a3e28;margin:0}.playroom-title-row .small{color:#8b7355}.kid-game-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.kid-game-card{display:flex;flex-direction:column;gap:.5rem;align-items:flex-start;text-align:left;text-decoration:none;background:#fff;border:4px solid #e8d5c4;border-radius:24px;padding:1.1rem;min-height:185px;box-shadow:0 10px 25px rgba(180,130,80,.11);cursor:pointer;color:#5a3e28;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.kid-game-card:hover{transform:translateY(-4px) rotate(-.5deg);box-shadow:0 18px 34px rgba(180,130,80,.18);background:#fffdf8}.kid-game-card span{font-size:3rem;filter:drop-shadow(0 5px 8px rgba(0,0,0,.08))}.kid-game-card strong{font-size:1.18rem}.kid-game-card small{color:#8b7355;line-height:1.4}.link-card{border-style:dashed}
.play-shell{max-width:740px;margin:0 auto;background:#fff;border:4px solid #e8d5c4;border-radius:30px;padding:1.1rem;box-shadow:0 18px 42px rgba(180,130,80,.13)}.play-topbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.5rem}.play-back{border:0;background:transparent;color:#c4956a;font-size:1.05rem;font-weight:800;cursor:pointer}.play-badges{display:flex;gap:.6rem;flex-wrap:wrap}.play-badges span{background:#fff8f0;border:2px solid #e8d5c4;border-radius:99px;padding:.35rem .7rem;font-weight:800}.play-shell h2{text-align:center;margin:.5rem 0 1rem;color:#5a3e28;font-size:1.8rem}.play-game-area{min-height:340px;background:#fffaf4;border:3px solid #f1dcc7;border-radius:24px;padding:1rem;text-align:center;display:grid;place-items:center;gap:.8rem;overflow:hidden}.play-progress{height:12px;background:#e8d5c4;border-radius:99px;margin:1rem 0;overflow:hidden}.play-progress span{display:block;height:100%;background:linear-gradient(90deg,#6bcb77,#f7d794);width:0;transition:width .4s ease}.play-feedback{background:rgba(255,255,255,.8);border:2px dashed #e8d5c4;border-radius:16px;padding:.8rem;text-align:center;color:#6d5a45;font-weight:700}.play-feedback.good{background:#e8f8ee;color:#287949;border-color:#6bcb77}.play-feedback.bad{background:#fff0f0;color:#c0392b;border-color:#ff9c9c}.play-controls{display:flex;justify-content:center;gap:.8rem;flex-wrap:wrap}.kid-prompt{font-size:1.25rem;font-weight:800;color:#5a3e28;margin:.2rem 0 .7rem}.kid-pizza{display:block;margin:.3rem auto;filter:drop-shadow(0 8px 15px rgba(180,130,80,.13))}.pizza-piece{animation:popIn .35s both}.kid-fraction{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;font-weight:800;font-family:'Fredoka','Comic Sans MS',cursive;color:#5a3e28;font-size:1.45rem;line-height:1;margin:0 .2rem;vertical-align:middle}.kid-fraction.big{font-size:2rem}.kid-fraction i{display:block;width:130%;height:3px;background:#5a3e28;border-radius:2px;margin:2px 0}.kid-options{display:flex;gap:.7rem;flex-wrap:wrap;justify-content:center}.kid-option{background:#fff;border:3px solid #e8d5c4;border-radius:18px;padding:.75rem 1.1rem;min-width:78px;cursor:pointer;box-shadow:0 4px 10px rgba(0,0,0,.05);transition:transform .15s ease,background .15s ease}.kid-option:hover{transform:scale(1.06);background:#fff6db}.builder-blocks{display:flex;flex-wrap:wrap;gap:.45rem;justify-content:center;margin:1rem auto;max-width:430px}.builder-blocks button{width:58px;height:58px;border:3px solid #c4956a;border-radius:14px;background:#f5e6d3;cursor:pointer;transition:transform .15s ease,background .15s ease}.builder-blocks button.on{background:linear-gradient(135deg,#6bcb77,#4d96ff);transform:scale(1.06)}.rocket-compare{display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap}.rocket-compare button{background:#fff;border:4px solid #e8d5c4;border-radius:24px;padding:1rem;min-width:180px;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease}.rocket-compare button:hover{transform:translateY(-3px);box-shadow:0 12px 22px rgba(180,130,80,.14)}.rocket-compare .rocket{font-size:2rem;display:block}.rocket-compare .fly{animation:rocketFly .65s ease both}.monster-box{display:grid;gap:.6rem;justify-items:center}.monster-face{font-size:5rem;animation:bob 1.6s ease-in-out infinite}.kid-bar{display:grid;grid-template-columns:repeat(var(--d),1fr);gap:3px;width:min(420px,90vw);height:52px;background:#e0e0e0;border:3px solid #bbb;border-radius:14px;padding:3px}.kid-bar span{border-radius:8px;background:transparent}.kid-bar span.on{background:linear-gradient(135deg,#4d96ff,#6bcb77);animation:popIn .3s both}.snack-row{display:flex;gap:.7rem;flex-wrap:wrap;justify-content:center}.snack{background:#fff;border:3px solid #e8d5c4;border-radius:18px;padding:.8rem 1rem;cursor:pointer}.snack.picked{background:#fff6db;border-color:#f5a623;transform:scale(1.05)}.boss-head{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:1rem}.boss-head>span:first-child{font-size:3.5rem}.boss-hp{height:14px;width:220px;background:#ffd6d6;border-radius:99px;overflow:hidden;border:2px solid #d94a4a}.boss-hp i{display:block;height:100%;background:linear-gradient(90deg,#ff6b6b,#d94a4a);transition:width .3s ease}.boss-win{text-align:center}.boss-win:first-letter{font-size:4rem}.playroom-note{background:rgba(255,255,255,.8);border-color:#e8d5c4}.playroom-note h2{color:#5a3e28}.kid-burst{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);font-size:5rem;z-index:9999;pointer-events:none;animation:kidBurst .85s ease forwards}.kid-confetti{position:fixed;top:-15px;width:12px;height:12px;z-index:9998;border-radius:3px;pointer-events:none;animation:kidConfetti 1.5s ease-in forwards}.shake{animation:shake .36s ease}
@keyframes spinSlow{to{transform:rotate(1turn)}}@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes popIn{0%{opacity:0;transform:scale(.65)}75%{transform:scale(1.06)}100%{opacity:1;transform:scale(1)}}@keyframes rocketFly{0%{transform:translateX(0)}55%{transform:translateX(55px) rotate(8deg)}100%{transform:translateX(0)}}@keyframes kidBurst{0%{opacity:0;transform:translate(-50%,-50%) scale(.4)}35%{opacity:1;transform:translate(-50%,-50%) scale(1.2)}100%{opacity:0;transform:translate(-50%,-90%) scale(.6) rotate(18deg)}}@keyframes kidConfetti{to{transform:translateY(105vh) rotate(720deg);opacity:0}}@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}
@media(max-width:900px){.playroom-hero-grid{grid-template-columns:1fr}.kid-game-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.playroom-title-row{align-items:flex-start;flex-direction:column}.playroom-stats{grid-template-columns:repeat(4,1fr)}}
@media(max-width:620px){.kid-game-grid{grid-template-columns:1fr}.playroom-stats{grid-template-columns:repeat(2,1fr)}.play-topbar{align-items:flex-start;flex-direction:column}.rocket-compare button{min-width:140px}.playroom-hero h1{font-size:2.6rem}}