:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--bg:#f5f6fb;--surface:#fff;--surface-2:#eef0f8;--text:#1c2033;--muted:#5b6178;--border:#dde0ee;--primary:#4f46e5;--primary-hover:#4338ca;--on-primary:#fff;--accent:#0d9488;--danger:#b42318;--danger-bg:#fef0ee;--success:#067647;--success-bg:#e8f7ef;--radius:14px;--shadow:0 1px 2px #1c20330f, 0 4px 16px #1c20330f;font-family:Inter,ui-rounded,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.5}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#121426;--surface:#1b1e36;--surface-2:#252945;--text:#eceefb;--muted:#a3a8c6;--border:#2f3454;--primary:#8b85ff;--primary-hover:#a5a0ff;--on-primary:#15122e;--accent:#2dd4bf;--danger:#ff9d92;--danger-bg:#3a1d27;--success:#6ee7a8;--success-bg:#142e24;--shadow:0 1px 2px #0000004d, 0 4px 16px #00000040}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);background-image:radial-gradient(60rem 24rem at 50% -8rem, color-mix(in srgb, var(--primary) 16%, transparent), transparent);background-repeat:no-repeat;min-height:100vh;margin:0}h1,h2,h3,p{margin:0}h1{letter-spacing:-.02em;font-size:1.625rem;line-height:1.2}h2{font-size:1.25rem;line-height:1.3}h3{font-size:1.0625rem;line-height:1.3}.shell{grid-template-columns:minmax(0,1fr);gap:1.5rem;width:100%;max-width:44rem;margin:0 auto;padding:1rem 1rem 3rem;display:grid}.stack{gap:1rem;display:grid}.row{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.row-between{justify-content:space-between;align-items:center;gap:.75rem;display:flex}.muted{color:var(--muted)}.small{font-size:.875rem}.topbar{justify-content:space-between;align-items:center;gap:.75rem;padding-block:.25rem;display:flex}.brand{letter-spacing:-.02em;color:var(--primary);align-items:center;gap:.5rem;font-weight:800;display:flex}.brand:before{content:"✎" / "";background:var(--primary);width:2rem;height:2rem;color:var(--on-primary);border-radius:10px;place-items:center;font-size:1.1rem;display:grid}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}.card.narrow{width:100%;max-width:26rem;margin:2rem auto 0}.hero{gap:.25rem;padding-block:.5rem;display:grid}.hero h1{font-size:1.875rem}.btn{font:inherit;cursor:pointer;background:var(--primary);min-height:2.75rem;color:var(--on-primary);border:1px solid #0000;border-radius:10px;padding:.5rem 1.1rem;font-weight:600;transition:background .15s,transform 50ms}.btn:hover:not(:disabled){background:var(--primary-hover)}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.secondary{background:var(--surface-2);color:var(--text);border-color:var(--border)}.btn.secondary:hover:not(:disabled){background:var(--border)}.btn.ghost{color:var(--primary);background:0 0;padding-inline:.6rem}.btn.ghost:hover:not(:disabled){background:var(--surface-2)}.btn.block{width:100%}.btn.small{min-height:2.25rem;padding:.25rem .8rem;font-size:.875rem}:focus-visible{outline:3px solid color-mix(in srgb, var(--primary) 70%, transparent);outline-offset:2px}.field{gap:.35rem;display:grid}.field>span{font-size:.9rem;font-weight:600}.field small{color:var(--muted)}input,textarea{font:inherit;border:1.5px solid var(--border);background:var(--bg);width:100%;min-height:2.75rem;color:var(--text);border-radius:10px;padding:.5rem .75rem}input:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 25%, transparent);outline:none}input.code{letter-spacing:.5em;text-align:center;font-variant-numeric:tabular-nums;padding-left:.5em;font-size:1.75rem}textarea{resize:vertical}textarea.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem}.form-grid{gap:.9rem;display:grid}.form-grid .two{grid-template-columns:1fr 1fr;gap:.9rem;display:grid}.alert{border-radius:10px;padding:.65rem .85rem;font-size:.925rem}.alert.error{background:var(--danger-bg);color:var(--danger)}.alert.success{background:var(--success-bg);color:var(--success)}.alert.info{background:color-mix(in srgb, var(--primary) 10%, transparent);color:var(--text)}.alert:empty{display:none}.avatar{width:2.75rem;height:2.75rem;color:var(--on-primary);background:linear-gradient(135deg, var(--primary), var(--accent));border-radius:50%;flex:none;place-items:center;font-size:1.15rem;font-weight:700;display:grid}.child-head{align-items:center;gap:.85rem;display:flex}.child-head>div{min-width:0}.child-head p{overflow-wrap:anywhere}.chips{flex-wrap:wrap;gap:.4rem;display:flex}.chip{background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:.1rem .7rem;font-size:.85rem}.badge{background:color-mix(in srgb, var(--accent) 18%, transparent);color:var(--accent);white-space:nowrap;border-radius:999px;padding:.1rem .65rem;font-size:.8rem;font-weight:700}.empty{text-align:center;border:2px dashed var(--border);border-radius:var(--radius);color:var(--muted);justify-items:center;gap:.5rem;padding:2rem 1.25rem;display:grid}.empty .emoji{font-size:2.25rem}.skeleton{border-radius:var(--radius);background:linear-gradient(90deg, var(--surface-2), var(--surface), var(--surface-2));background-size:200% 100%;height:7rem;animation:1.4s linear infinite shimmer}@keyframes shimmer{to{background-position:-200% 0}}.panel{border-top:1px solid var(--border);gap:.75rem;padding-top:1rem;display:grid}.admin{border:1px dashed var(--border);border-radius:var(--radius);color:var(--muted);padding:.75rem 1rem;font-size:.9rem}.admin>summary{cursor:pointer;align-items:center;min-height:2.25rem;font-weight:600;display:flex}.admin[open]>summary{margin-bottom:.75rem}.admin h3{margin:1rem 0 .5rem;font-size:.95rem}.table-wrap{border:1px solid var(--border);border-radius:10px;overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.85rem}th,td{text-align:left;border-bottom:1px solid var(--border);white-space:nowrap;padding:.45rem .7rem}tr:last-child td{border-bottom:0}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface-2);border-radius:10px;margin:.75rem 0 0;padding:.75rem;font-size:.8rem}pre:empty{display:none}@media (width<=30rem){.form-grid .two{grid-template-columns:1fr}.card{padding:1rem}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.tiles{grid-template-columns:repeat(auto-fit,minmax(8.5rem,1fr));gap:.75rem;display:grid}.tile{border:1px solid var(--border);background:var(--surface,var(--bg));border-radius:12px;flex-direction:column;gap:.15rem;padding:.75rem .9rem;display:flex}.tile strong{font-variant-numeric:tabular-nums;font-size:1.35rem}th.num,td.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}tr.clickable{cursor:pointer}tr.clickable:hover td{background:color-mix(in srgb, var(--primary) 6%, transparent)}select{font:inherit;border:1.5px solid var(--border);background:var(--bg);min-height:2.25rem;color:var(--text);border-radius:8px;padding:.25rem .5rem}.progress{background:var(--surface-2);border-radius:999px;height:.5rem;overflow:hidden}.progress>div{background:var(--primary);height:100%;transition:width .3s}.choices{border:0;gap:.5rem;margin:0;padding:0;display:grid}.choice{border:1.5px solid var(--border);cursor:pointer;border-radius:10px;align-items:center;gap:.6rem;min-height:2.75rem;padding:.5rem .75rem;display:flex}.choice.selected{border-color:var(--primary);background:color-mix(in srgb, var(--primary) 8%, transparent)}.choice input{width:auto;min-height:0}.mastery{grid-template-columns:minmax(4rem,1fr) 6.5rem;align-items:center;gap:.5rem;display:grid}.progress.weak>div{background:var(--danger)}.progress.ok>div{background:var(--primary)}.progress.strong>div{background:var(--success)}.progress.few>div{background:var(--muted)}.status.weak{color:var(--danger)}.status.strong{color:var(--success)}.status.none,.status.few{color:var(--muted)}.skill-list{gap:.6rem;margin:.5rem 0 0;padding:0;list-style:none;display:grid}.skill-list li{grid-template-columns:minmax(0,1fr) minmax(9rem,14rem) auto;align-items:center;gap:.75rem;display:grid}@media (width<=30rem){.skill-list li{grid-template-columns:minmax(0,1fr) auto}.skill-list li .mastery{grid-area:2/1/auto/-1}}.challenge{border-color:color-mix(in srgb, var(--primary) 45%, var(--border));background:color-mix(in srgb, var(--primary) 6%, var(--surface))}.practice-modes{grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));gap:.6rem;display:grid}.mode{text-align:left;font:inherit;color:var(--text);background:var(--surface-2);border:1.5px solid var(--border);cursor:pointer;border-radius:12px;gap:.15rem;padding:.7rem .9rem;display:grid}.mode:hover{border-color:var(--primary)}.mode strong{font-size:1rem}.section-head{border-left:4px solid var(--accent);padding-left:.75rem}.level{background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:.05rem .4rem;font-size:.75rem;font-weight:700}.prompt{white-space:pre-line}.figure{border-radius:12px;width:100%;max-width:32rem;height:auto;margin:.25rem 0;display:block}.cover{object-fit:contain;border-radius:12px;flex:none;width:4.5rem;height:4.5rem}.grow{flex:1;min-width:0}.subject-tabs{flex-wrap:wrap;gap:.4rem;display:flex}.subject-tabs .chip{font:inherit;cursor:pointer;white-space:nowrap;min-height:2.25rem;color:var(--text);font-size:.9rem}.subject-tabs .chip.active{background:var(--primary);border-color:var(--primary);color:var(--on-primary);font-weight:600}.chat{border-top:1px dashed var(--border);padding-top:.75rem}.bubble{white-space:pre-line;border-radius:14px;max-width:85%;padding:.55rem .8rem;font-size:.925rem;animation:.18s ease-out pop}.bubble.child{background:var(--primary);color:var(--on-primary);border-bottom-right-radius:4px;justify-self:end}.bubble.tutor{background:var(--surface-2);border-bottom-left-radius:4px;justify-self:start}.bubble.system{background:var(--success-bg);max-width:none;color:var(--success);justify-self:stretch;font-weight:600}.typing{gap:.25rem;display:flex}.typing span{background:var(--muted);border-radius:50%;width:.45rem;height:.45rem;animation:1s infinite blink}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes blink{0%,80%,to{opacity:.3}40%{opacity:1}}@keyframes pop{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.bubble,.typing span{animation:none}}.confetti{pointer-events:none;height:0;position:relative}.confetti span{opacity:0;border-radius:2px;width:8px;height:12px;animation:1.1s ease-out forwards confetti;position:absolute;top:0;left:50%}@keyframes confetti{0%{opacity:1;transform:translate(0)rotate(0)}to{transform:translate(var(--x), var(--y)) rotate(var(--r));opacity:0}}@media (prefers-reduced-motion:reduce){.confetti{display:none}}.read-aloud{place-self:flex-start start}.sticker-grid{border-bottom:1px dashed var(--border);grid-template-columns:repeat(auto-fill,minmax(5.5rem,1fr));gap:.75rem;padding:.75rem 0;display:grid}.sticker{text-align:center;align-content:start;justify-items:center;gap:.3rem;margin:0;display:grid}.sticker figcaption{overflow-wrap:anywhere;color:var(--muted)}.sticker.earned figcaption{color:var(--text);font-weight:600}.sticker-face{background:var(--surface-2);width:4.5rem;height:4.5rem;color:var(--muted);border:3px dashed var(--border);border-radius:50%;place-items:center;font-size:2.1rem;font-weight:800;display:grid;position:relative;overflow:hidden}.sticker.earned .sticker-face{background:var(--surface);color:inherit;border:3px solid var(--primary);box-shadow:var(--shadow)}.sticker.big{grid-column:span 2}.sticker.big .sticker-face{width:6.5rem;height:6.5rem;font-size:3rem}.sticker.big.earned .sticker-face{box-shadow:0 0 0 3px #fde68a, var(--shadow);border-width:5px;border-color:#f5b301}.sticker-face img{object-fit:cover;width:100%;height:100%}.new-stickers{text-align:center;background:var(--success-bg);border-radius:var(--radius);padding:1rem}.new-stickers .sticker-grid{border:0;grid-template-columns:repeat(auto-fit,minmax(5.5rem,8rem));justify-content:center}@media (prefers-reduced-motion:no-preference){.sticker.earned .sticker-face:after{content:"";pointer-events:none;background:linear-gradient(115deg,#0000 35%,#ffffff8c 50%,#0000 65%);animation:4s ease-in-out infinite shine;position:absolute;inset:0;transform:translate(-100%)}.new-stickers .sticker{animation:.4s ease-out pop}}@keyframes shine{0%,70%{transform:translate(-100%)}to{transform:translate(100%)}}.ex-cards{flex-wrap:wrap;align-items:center;gap:.5rem;min-height:3rem;display:flex}.ex-card{font:inherit;color:var(--text);background:var(--surface-2);border:1.5px solid var(--border);cursor:pointer;text-align:center;border-radius:12px;min-width:3rem;min-height:3rem;padding:.5rem .9rem;font-weight:600;position:relative}.ex-card:hover{border-color:var(--primary)}.ex-card[aria-pressed=true]{border-color:var(--primary);background:color-mix(in srgb, var(--primary) 22%, var(--surface));box-shadow:0 0 0 2px var(--primary)}.ex-groups{gap:.6rem;display:grid}.ex-group{border:2px dashed var(--border);border-radius:14px;gap:.5rem;padding:.5rem;display:grid}.ex-group.ready{border-color:var(--primary)}.ex-group-head{font:inherit;color:var(--text);cursor:pointer;text-align:left;background:0 0;border:0;border-radius:10px;min-height:2.75rem;padding:.25rem .5rem;font-weight:700}.ex-group-head:not(:disabled){background:color-mix(in srgb, var(--primary) 14%, transparent)}.ex-group-head:disabled{cursor:default}.ex-card.placed{background:var(--surface)}.ex-seq{counter-reset:seq;gap:.4rem;margin:0;padding:0;list-style:none;display:grid}.ex-seq li{counter-increment:seq;border:2px dashed var(--border);border-radius:12px;align-items:center;gap:.6rem;min-height:3rem;padding:.4rem .75rem;font-weight:600;display:flex}.ex-seq li:before{content:counter(seq);background:var(--surface-2);border-radius:50%;flex:none;place-items:center;width:1.75rem;height:1.75rem;font-size:.85rem;display:grid}.ex-seq li.filled{border-style:solid;border-color:var(--primary);background:color-mix(in srgb, var(--primary) 10%, var(--surface))}.ex-match{grid-template-columns:1fr 1fr;gap:.75rem;display:grid}.ex-col{align-content:start;gap:.5rem;display:grid}.ex-card.paired{border-color:var(--pc);background:color-mix(in srgb, var(--pc) 26%, var(--surface))}.ex-card.c0{--pc:#e5484d}.ex-card.c1{--pc:#f59e0b}.ex-card.c2{--pc:#30a46c}.ex-card.c3{--pc:#0ea5e9}.ex-card.c4{--pc:#8e4ec6}.ex-card.c5{--pc:#e93d82}.ex-badge{background:var(--pc);color:#fff;border-radius:50%;place-items:center;width:1.4rem;height:1.4rem;font-size:.75rem;font-weight:700;display:grid;position:absolute;top:-.5rem;left:-.5rem}.ex-clock{width:min(100%,17rem);height:auto;margin:0 auto;display:block}.ex-face{fill:var(--surface);stroke:var(--text);stroke-width:3px}.ex-tick{stroke:var(--muted);stroke-width:1px}.ex-tick.big{stroke:var(--text);stroke-width:2.5px}.ex-num{fill:var(--text);font-family:inherit;font-size:15px;font-weight:700}.ex-hand{stroke-linecap:round}.ex-hand.hour{stroke:var(--text);stroke-width:8px}.ex-hand.minute{stroke:var(--primary);stroke-width:5px}.ex-hub{fill:var(--text)}.ex-hit{stroke:#0000;stroke-width:26px;stroke-linecap:round;cursor:grab;touch-action:none}.ex-readout{text-align:center;font-variant-numeric:tabular-nums;font-size:1.5rem;font-weight:700}.ex-steppers{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem;display:grid}.ex-stepper{text-align:center;grid-template-columns:3rem minmax(0,1fr) 3rem;align-items:center;gap:.25rem;font-weight:600;display:grid}.ex-stepper .btn{min-height:3rem;padding:0;font-size:1.5rem}.ex-money,.ex-wallet{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.ex-wallet{border:2px dashed var(--border);background:var(--surface-2);border-radius:14px;min-height:4.5rem;padding:.5rem}.ex-pick{font:inherit;cursor:pointer;background:0 0;border:0;border-radius:12px;place-items:center;min-width:3rem;min-height:3rem;padding:.15rem;display:grid}.ex-pick:hover{background:color-mix(in srgb, var(--primary) 14%, transparent)}.ex-coin{color:#2b2112;border:3px solid #00000040;border-radius:50%;place-items:center;font-weight:800;display:grid;box-shadow:inset 0 0 0 2px #ffffff59}.ex-coin.copper{background:#d08a5b}.ex-coin.gold{background:#e8c547}.ex-note{color:#1c2033;border:2px solid #0000004d;border-radius:6px;place-items:center;font-weight:800;display:grid;box-shadow:inset 0 0 0 3px #fff6}.ex-sum{font-size:1.25rem}
