:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f6f2ea;--surface:#fff;--surface-2:#f2efe8;--surface-3:#e8e4db;--border:#e4dfd4;--border-strong:#d2cbbd;--text:#2a2e35;--text-muted:#686c75;--text-faint:#a3a6ad;--on-color:#fff;--primary:#e0702e;--primary-press:#b4561f;--primary-soft:#fbe8db;--primary-text:#9c4615;--good:#3f9b6c;--good-press:#2f7a54;--good-soft:#e3f1e9;--good-text:#276a49;--navy:#2b4160;--navy-press:#1c2c42;--court:#ecd6b2;--court-edge:#d9bd91;--court-line:#fffaf2;--board:#fff;--board-edge:#c4cbd5;--rim:#d9582a;--net:#9aa3ae;--gold:#e2a42a;--gold-press:#b98417;--gold-soft:#fbf0d6;--gold-text:#8d6410;--coral:#d9505e;--coral-press:#b03a48;--coral-soft:#fbe4e6;--coral-text:#9e2f3c;--sky:#4b8ed0;--sky-press:#3672ad;--sky-soft:#e2edf9;--sky-text:#2d659d;--copper:#ddae86;--copper-edge:#a8744b;--silver:#d8dce2;--silver-edge:#9aa1ab;--coin-text:#2a2e35;--shadow-sm:0 1px 2px #2823190f;--shadow:0 2px 6px #2823190d, 0 12px 32px #28231914;--radius-sm:12px;--radius:16px;--radius-lg:22px;--font:"Nunito", ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--content:600px}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#1a1d22;--surface:#23272e;--surface-2:#2b3038;--surface-3:#363c46;--border:#353a43;--border-strong:#4a515c;--text:#eceef1;--text-muted:#a8aeb8;--text-faint:#6f7682;--primary:#ec8040;--primary-press:#a9531f;--primary-soft:#3d2a1f;--primary-text:#f5ad7c;--good:#4fae7d;--good-press:#357d58;--good-soft:#22372d;--good-text:#8fd3ad;--navy:#2f4766;--navy-press:#1d2d42;--court:#3b3128;--court-edge:#2c241d;--court-line:#6b5c4c;--board:#2b3038;--board-edge:#59616d;--rim:#e86a38;--net:#8a929c;--gold:#e8b23f;--gold-press:#a97f1f;--gold-soft:#3a321f;--gold-text:#f0c96e;--coral:#e56874;--coral-press:#a83f4b;--coral-soft:#3e2428;--coral-text:#f4a2ab;--sky:#5d9de0;--sky-press:#3b6fa6;--sky-soft:#1f3044;--sky-text:#9cc4ee;--copper:#c7966b;--copper-edge:#8a5c37;--silver:#b5bcc6;--silver-edge:#6f7782;--shadow-sm:0 1px 2px #0000004d;--shadow:0 2px 8px #0000004d, 0 12px 32px #0000004d}}@font-face{font-family:Nunito;font-style:normal;font-weight:600 900;font-display:swap;src:url(../fonts/nunito-latin.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}body{background:var(--bg);min-height:100dvh;color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;margin:0;font-size:16px;font-weight:600;line-height:1.45}button,input{font:inherit;color:inherit}button{cursor:pointer;touch-action:manipulation}a{color:inherit;text-decoration:none}h1,h2,h3{margin:0;font-weight:900;line-height:1.2}p{margin:0}:focus-visible{outline:3px solid var(--sky);outline-offset:2px}.muted{color:var(--text-muted)}.small{font-size:.875rem}.c-flame{color:var(--gold)}.c-gem{color:var(--sky)}.c-faint{color:var(--text-faint)}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}.btn{--btn-bg:var(--primary);--btn-edge:var(--primary-press);--btn-fg:var(--on-color);background:var(--btn-bg);min-height:52px;color:var(--btn-fg);box-shadow:0 4px 0 var(--btn-edge);letter-spacing:.01em;-webkit-user-select:none;user-select:none;border:0;border-radius:14px;justify-content:center;align-items:center;gap:8px;margin-bottom:4px;padding:12px 22px;font-size:1.05rem;font-weight:800;transition:transform 80ms,box-shadow 80ms,filter .15s;display:inline-flex}.btn:hover:not(:disabled){filter:brightness(1.05)}.btn:active:not(:disabled){box-shadow:0 0 0 var(--btn-edge);transform:translateY(4px)}.btn:disabled{--btn-bg:var(--surface-3);--btn-edge:var(--border-strong);--btn-fg:var(--text-faint);cursor:not-allowed}.btn-ghost{--btn-bg:var(--surface);--btn-edge:var(--border);--btn-fg:var(--text);border:2px solid var(--border)}.btn-ghost.btn:disabled{--btn-bg:var(--surface);border-color:var(--surface-3)}.btn-danger{--btn-bg:var(--coral);--btn-edge:var(--coral-press)}.btn-good{--btn-bg:var(--good);--btn-edge:var(--good-press)}.btn-sky{--btn-bg:var(--sky);--btn-edge:var(--sky-press)}.btn-block{width:100%}.btn-small{min-height:40px;box-shadow:0 3px 0 var(--btn-edge);border-radius:12px;padding:6px 14px;font-size:.92rem}.btn-small:active:not(:disabled){transform:translateY(3px)}.icon-btn{width:44px;height:44px;color:var(--text-faint);background:0 0;border:0;border-radius:12px;flex:none;place-items:center;display:grid}.icon-btn:hover{background:var(--surface-2);color:var(--text-muted)}.card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-lg);padding:16px}.bar{background:var(--surface-3);border-radius:99px;height:14px;position:relative;overflow:hidden}.bar-big{height:18px}.bar-fill{background:var(--primary);border-radius:99px;min-width:18px;height:100%;transition:width .5s cubic-bezier(.34,1.4,.64,1);position:relative}.bar-fill:after{content:"";background:#ffffff52;border-radius:99px;height:4px;position:absolute;top:3px;left:8px;right:8px}.bar-gold .bar-fill{background:var(--gold)}.stars{color:var(--surface-3);gap:2px;display:inline-flex}.stars .on{color:var(--gold)}.stars-big{gap:8px}.stars-big svg{width:52px;height:52px}.stars-big .on{animation:.5s cubic-bezier(.3,1.6,.5,1) both star-pop}.stars-big .on:nth-child(2){animation-delay:.15s}.stars-big .on:nth-child(3){animation-delay:.3s}@keyframes star-pop{0%{opacity:0;transform:scale(.2)rotate(-30deg)}}.sheet-backdrop{z-index:100;background:#1414196b;justify-content:center;align-items:flex-end;animation:.2s fade-in;display:flex;position:fixed;inset:0}.sheet{width:100%;max-width:480px;max-height:90dvh;padding:24px 20px calc(20px + env(safe-area-inset-bottom));background:var(--surface);border-radius:26px 26px 0 0;gap:14px;animation:.3s cubic-bezier(.2,.9,.3,1.05) sheet-up;display:grid;overflow:auto}.sheet h2,.sheet h3{font-size:1.35rem}.sheet-center{text-align:center;justify-items:center}.sheet-actions{gap:10px;width:100%;margin-top:4px;display:grid}.sheet-big{font-size:64px;line-height:1}@media (width>=640px){.sheet-backdrop{align-items:center;padding:24px}.sheet{border-radius:26px;padding-bottom:24px}}@keyframes fade-in{0%{opacity:0}}@keyframes sheet-up{0%{opacity:0;transform:translateY(40px)}}.toast{top:calc(12px + env(safe-area-inset-top));z-index:120;border:2px solid var(--border);background:var(--surface);width:fit-content;max-width:480px;box-shadow:var(--shadow);border-radius:18px;align-items:center;gap:12px;margin:0 auto;padding:12px 18px;animation:.4s cubic-bezier(.2,.9,.3,1.2) toast-in;display:flex;position:fixed;left:16px;right:16px}.toast-icon{font-size:30px;line-height:1}.toast-title{letter-spacing:.06em;text-transform:uppercase;color:var(--gold-text);font-size:.78rem;font-weight:900}@keyframes toast-in{0%{opacity:0;transform:translateY(-30px)}}.confetti{z-index:5;pointer-events:none;position:fixed;inset:0;overflow:hidden}.confetti i{opacity:.9;border-radius:3px;height:12px;animation:linear forwards fall;position:absolute;top:-16px}@keyframes fall{to{transform:translateY(105vh)rotate(720deg)}}@media (prefers-reduced-motion:reduce){.confetti{display:none}}.mixed{vertical-align:middle;align-items:center;gap:.08em;display:inline-flex}.frac{vertical-align:middle;flex-direction:column;align-items:center;margin:0 .06em;font-size:.8em;line-height:1.05;display:inline-flex}.frac-top{border-bottom:.09em solid;padding:0 .14em .05em}.frac-bottom{padding:.05em .14em 0}.blank.blank-small{border-width:2px;border-radius:8px;min-width:1.2em;height:1.1em;margin:.06em 0;font-size:.8em}.blank{border:3px dashed var(--border-strong);min-width:1.5em;height:1.3em;color:var(--text-faint);vertical-align:middle;border-radius:12px;place-items:center;padding:0 .1em;font-size:.85em;display:inline-grid}.switch{appearance:none;background:var(--surface-3);cursor:pointer;border-radius:99px;flex:none;width:54px;height:32px;margin:0;transition:background .2s;position:relative}.switch:after{content:"";background:#fff;border-radius:50%;width:26px;height:26px;transition:transform .2s cubic-bezier(.3,1.4,.6,1);position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #00000040}.switch:checked{background:var(--primary)}.switch:checked:after{transform:translate(22px)}.shell{min-height:100dvh;display:flex}.sidebar{display:none}.main{flex-direction:column;flex:1;min-width:0;display:flex}.content{width:100%;max-width:var(--content);padding:16px 16px calc(100px + env(safe-area-inset-bottom));margin:0 auto}.topbar{z-index:30;padding-top:env(safe-area-inset-top);border-bottom:2px solid var(--border);background:var(--bg);background:color-mix(in srgb, var(--bg) 88%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);position:sticky;top:0}.topbar-inner{max-width:var(--content);justify-content:space-between;align-items:center;gap:8px;height:60px;margin:0 auto;padding:0 10px 0 16px;display:flex}.grade-chip{border:2px solid var(--border);background:var(--surface);height:38px;color:var(--text-muted);white-space:nowrap;border-radius:12px;align-items:center;gap:6px;padding:0 12px;font-size:.92rem;font-weight:800;display:inline-flex}.grade-chip:hover{border-color:var(--border-strong)}.stats{gap:2px;display:flex}.stat{background:0 0;border:0;border-radius:12px;align-items:center;gap:5px;height:40px;padding:0 9px;font-size:1.02rem;font-weight:800;display:inline-flex}.stat:hover{background:var(--surface-2)}.bottomnav{z-index:30;padding:6px 8px calc(6px + env(safe-area-inset-bottom));border-top:2px solid var(--border);background:var(--surface);justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0}.nav-item{max-width:110px;color:var(--text-faint);border:2px solid #0000;border-radius:14px;flex-direction:column;flex:1;align-items:center;gap:2px;padding:6px 4px;font-size:.78rem;font-weight:800;display:flex}.nav-item:hover{color:var(--text-muted)}.nav-item.active{border-color:color-mix(in srgb, var(--primary) 30%, transparent);background:var(--primary-soft);color:var(--primary-text)}.brand{color:var(--primary-text);letter-spacing:-.01em;align-items:center;gap:10px;padding:6px 10px 22px;font-size:1.4rem;font-weight:900;display:flex}@media (width>=768px){.sidebar{border-right:2px solid var(--border);background:var(--surface);flex-direction:column;gap:6px;width:236px;height:100dvh;padding:22px 14px;display:flex;position:sticky;top:0}.sidebar .nav-item{letter-spacing:.02em;flex-direction:row;flex:none;gap:14px;max-width:none;padding:10px 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var(--border);border-radius:var(--radius-lg);background:var(--surface);justify-content:space-between;align-items:center;gap:14px;padding:16px 18px;display:flex}.unit-card.is-current{border-color:var(--navy);background:var(--navy);color:var(--on-color);box-shadow:0 4px 0 var(--navy-press)}.unit-label{letter-spacing:.08em;text-transform:uppercase;opacity:.7;font-size:.78rem;font-weight:900}.unit-title{margin:2px 0;font-size:1.3rem}.unit-meta{opacity:.75;font-size:.9rem;font-weight:700}.unit-icon{background:var(--surface-2);border-radius:16px;flex:none;place-items:center;width:56px;height:56px;font-size:30px;display:grid}.unit-card.is-current .unit-icon{background:#fff3}.path{flex-direction:column;align-items:center;gap:22px;padding:30px 0 6px;display:flex}.node-wrap{translate:var(--x,0) 0;flex-direction:column;align-items:center;gap:7px;display:flex;position:relative}.node-wrap.is-current{margin-top:40px}.node{--face:var(--primary);--edge:var(--primary-press);--seams:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 72 66' preserveAspectRatio='none'%3E%3Cpath d='M36 1v64M1 33h70M13 8c11 11 11 39 0 50M59 8c-11 11-11 39 0 50' fill='none' stroke='%233b2416' stroke-opacity='.5' stroke-width='2.2'/%3E%3C/svg%3E");background:var(--seams) center / 100% 100% no-repeat, var(--face);width:72px;height:66px;color:var(--on-color);box-shadow:0 6px 0 var(--edge);border:0;border-radius:50%;place-items:center;transition:transform 80ms,box-shadow 80ms;display:grid;position:relative}.node:active{box-shadow:0 1px 0 var(--edge);transform:translateY(5px)}.node-locked{--face:var(--surface-3);--edge:var(--border-strong);--seams:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 72 66' preserveAspectRatio='none'%3E%3Cpath d='M36 1v64M1 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var(--border);background:var(--surface);width:12px;height:12px;position:absolute;top:100%;left:50%;translate:-50% -50%;rotate:45deg}@keyframes bob{50%{transform:translateY(-5px)}}.chest{background:0 0;border:0;border-radius:20px;place-items:center;padding:4px;display:grid}.chest:hover{background:var(--surface-2)}.chest-ready svg{animation:2.6s ease-in-out infinite wiggle}.chest-locked{filter:grayscale();opacity:.5}.chest-open{opacity:.75}@keyframes wiggle{0%,70%,to{rotate:0deg}76%{rotate:-8deg}82%{rotate:8deg}88%{rotate:-5deg}94%{rotate:3deg}}.lesson-pick{align-items:center;gap:14px;display:flex}.lesson-pick-icon{background:var(--surface-2);border-radius:18px;flex:none;place-items:center;width:58px;height:58px;font-size:32px;display:grid}.lesson-pick-stars{align-items:center;gap:10px;display:flex}.lesson-pick-stars .stars svg{width:24px;height:24px}.eyebrow{color:var(--text-muted);font-size:.85rem;font-weight:800}.chest-reward{place-items:center;padding-top:26px;display:grid;position:relative}.chest-sticker{font-size:56px;animation:.7s cubic-bezier(.3,1.6,.5,1) both rise;position:absolute;top:0}@keyframes rise{0%{opacity:0;transform:translateY(40px)scale(.3)}}.grade-done{text-align:center;justify-items:center;gap:10px;margin-top:30px;padding:24px;display:grid}.lesson{--foot-h:calc(86px + env(safe-area-inset-bottom));min-height:100dvh;padding-bottom:var(--foot-h);flex-direction:column;display:flex}.lesson-head{width:100%;max-width:640px;padding:calc(10px + env(safe-area-inset-top)) 16px 6px 8px;align-items:center;gap:12px;margin:0 auto;display:flex}.lesson-head .bar{flex:1}.lesson-tag{background:var(--sky-soft);color:var(--sky-text);white-space:nowrap;border-radius:10px;padding:4px 10px;font-size:.85rem;font-weight:900}.lesson-body{flex-direction:column;flex:1;gap:18px;width:100%;max-width:640px;margin:0 auto;padding:10px 16px 22px;animation:.3s q-in;display:flex}@keyframes q-in{0%{opacity:0;transform:translate(24px)}}.prompt-row{align-items:flex-end;gap:10px;display:flex}.buddy{flex:none;font-size:48px;line-height:1}.bubble{border:2px solid var(--border);background:var(--surface);border-radius:18px;flex:1;padding:12px 16px;font-size:1.15rem;font-weight:800;line-height:1.4;position:relative}.bubble:before{content:"";border-bottom:2px solid var(--border);border-left:2px solid var(--border);background:var(--surface);width:14px;height:14px;position:absolute;bottom:14px;left:-9px;rotate:45deg}.visual-card{border:2px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);justify-content:center;padding:14px;display:flex}.visual-card .fit{max-width:100%;height:auto}.expression{text-align:center;letter-spacing:.01em;padding:2px 0;font-size:clamp(2rem,9vw,2.8rem);font-weight:900;line-height:1.3}.lesson-foot{z-index:10;min-height:var(--foot-h);border-top:2px solid var(--border);background:var(--bg);position:fixed;bottom:0;left:0;right:0}.lesson-foot.right{background:var(--good-soft);border-top-color:#0000;animation:.22s ease-out foot-up}.lesson-foot.wrong{background:var(--coral-soft);border-top-color:#0000;animation:.22s ease-out foot-up}@keyframes foot-up{0%{transform:translateY(48px)}}@media (prefers-reduced-motion:reduce){.lesson-foot.right,.lesson-foot.wrong{animation:none}}.foot-inner{max-width:640px;padding:14px 16px calc(14px + env(safe-area-inset-bottom));flex-direction:column;gap:12px;margin:0 auto;display:flex}.foot-inner .btn{width:100%}.foot-tip{width:100%;min-height:52px;color:var(--text-faint);place-items:center;margin:0 0 4px;font-weight:800;display:grid}@media (width>=640px){.foot-inner{flex-direction:row;justify-content:space-between;align-items:center;min-height:112px}.foot-inner .btn{flex:none;width:auto;min-width:190px}}.feedback{align-items:flex-start;gap:12px;max-height:42dvh;animation:.25s slide-up;display:flex;overflow-y:auto}@keyframes slide-up{0%{opacity:0;transform:translateY(12px)}}.feedback-icon{background:var(--surface);border-radius:50%;flex:none;place-items:center;width:46px;height:46px;display:grid}.right .feedback-icon,.right .feedback-title,.right .feedback-text{color:var(--good-text)}.wrong .feedback-icon,.wrong .feedback-title,.wrong .feedback-text{color:var(--coral-text)}.feedback-title{font-size:1.35rem;font-weight:900}.feedback-text{font-size:1.05rem;font-weight:800}.feedback-why{background:var(--surface);color:var(--text);border-radius:12px;margin-top:8px;padding:8px 12px;font-size:.95rem;font-weight:700}.feedback-why b{color:var(--coral-text)}.feedback-hint{color:var(--text);margin-top:4px;font-size:.98rem;font-weight:700}.count-grid{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.ten-frame{background:var(--surface-2);border-radius:14px;grid-template-columns:repeat(5,1fr);align-content:start;gap:4px;padding:8px;display:grid}.ten-frame .slot{background:var(--surface);border-radius:10px;place-items:center;width:1.3em;height:1.3em;font-size:clamp(22px,6.4vw,30px);line-height:1;display:grid}.ten-frame .slot-empty{border:2px dashed var(--border-strong);background:0 0}.coins{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;display:flex}.blocks{flex-wrap:wrap;justify-content:center;align-items:flex-end;gap:16px;display:flex}.blocks-group{flex-wrap:wrap;align-items:flex-end;gap:5px;display:flex}.blocks-ones{grid-template-columns:repeat(5,auto);gap:4px;display:grid}.result{max-width:520px;min-height:100dvh;padding:calc(28px + env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));text-align:center;flex-direction:column;gap:22px;margin:0 auto;display:flex}.result-hero{justify-items:center;gap:8px;margin-top:auto;display:grid}.result-hero h1{color:var(--gold-text);font-size:2rem}.result-buddy{font-size:88px;line-height:1;animation:.9s ease-in-out infinite alternate hop}@keyframes hop{to{transform:translateY(-10px)}}.result-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.result-stat{border:2px solid var(--tone);background:var(--surface);border-radius:16px;overflow:hidden}.tone-gold{--tone:var(--gold);--tone-text:var(--gold-text);--tone-soft:var(--gold-soft)}.tone-sky{--tone:var(--sky);--tone-text:var(--sky-text);--tone-soft:var(--sky-soft)}.tone-primary{--tone:var(--primary);--tone-text:var(--primary-text);--tone-soft:var(--primary-soft)}.result-stat-label{background:var(--tone);color:var(--on-color);letter-spacing:.06em;text-transform:uppercase;padding:4px;font-size:.8rem;font-weight:900}.result-stat-value{color:var(--tone-text);justify-content:center;align-items:center;gap:5px;padding:12px 4px;font-size:1.35rem;font-weight:900;display:flex}.result-list{text-align:left;gap:8px;margin:0;padding:0;list-style:none;display:grid}.result-list li{border:2px solid var(--border);background:var(--surface);border-radius:14px;align-items:center;gap:10px;padding:12px 14px;font-weight:800;animation:.4s both slide-up;display:flex}.result-list li:nth-child(2){animation-delay:.1s}.result-list li:nth-child(3){animation-delay:.2s}.result-list li:nth-child(4){animation-delay:.3s}.result-badge{border-color:var(--gold)!important;background:var(--gold-soft)!important}.result-continue{margin-top:auto}.count-line{flex-wrap:wrap;justify-content:center;gap:4px 6px;max-width:15em;font-size:clamp(24px,7vw,32px);line-height:1.2;display:flex}.dice{border:2px solid var(--border-strong);background:var(--surface);border-radius:18px;grid-template-rows:repeat(3,1.4em);grid-template-columns:repeat(3,1.4em);place-items:center;padding:10px;font-size:clamp(24px,7vw,30px);line-height:1;display:grid}.scatter{width:min(100%,300px);height:150px;font-size:28px;line-height:1;position:relative}.scatter-item{position:absolute;translate:-50% -50%}.groups{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;display:flex}.groups-item{align-items:center;gap:10px;display:flex}.groups-sign{color:var(--text-muted);font-size:2rem;font-weight:900}.group{background:var(--surface-2);border-radius:14px;grid-template-columns:repeat(5,auto);gap:4px;padding:8px 10px;font-size:clamp(22px,6.4vw,28px);line-height:1.15;display:grid}.group:has(>:nth-child(-n+4):last-child){grid-template-columns:repeat(4,auto)}.group-thing.is-crossed{opacity:.45;position:relative}.group-thing.is-crossed:after{content:"";background:linear-gradient(45deg, transparent 44%, var(--coral) 44% 56%, transparent 56%), linear-gradient(-45deg, transparent 44%, var(--coral) 44% 56%, transparent 56%);position:absolute;inset:10% 0}.pattern{flex-wrap:wrap;justify-content:center;align-items:center;gap:2px;display:flex}.pattern-item{width:clamp(26px,8.4vw,46px);height:clamp(22px,6.4vw,34px)}.pattern-blank{border:2px dashed var(--border-strong);color:var(--text-muted);border-radius:10px;place-items:center;font-weight:900;display:grid}.chart{gap:4px;font-size:clamp(20px,5.6vw,26px);line-height:1;display:grid}.chart-row{align-items:center;gap:3px;display:grid}.chart-cell{border-bottom:2px solid var(--border);place-items:center;height:1.45em;display:grid}.pic{width:100%;height:100%;display:block}.pic-large{width:min(100%,180px);height:auto}.pic.pic-inline{border:2px solid var(--border);background:var(--surface);vertical-align:middle;border-radius:8px;width:64px;height:45px;margin:0 2px;display:inline-block}.lesson-body>.court{margin-top:auto}.bubble:has(.speak-btn){padding-right:52px}.speak-btn{background:var(--surface-2);width:38px;height:38px;color:var(--text-muted);border:0;border-radius:50%;place-items:center;display:grid;position:absolute;top:8px;right:8px}.speak-btn:active{background:var(--primary-soft);color:var(--primary-text)}.tip-mouse{display:none}@media (pointer:fine){.tip-touch{display:none}.tip-mouse{display:inline}}.court{--board-w:min(22.5cqi, 126px);--board-h:calc(var(--board-w) * .78);--rim-w:calc(var(--board-w) * .62);border:2px solid var(--court-edge);border-radius:var(--radius-lg);background:repeating-linear-gradient(90deg, transparent 0 52px, color-mix(in srgb, var(--court-edge) 35%, transparent) 52px 54px), var(--court);touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;flex:none;height:300px;position:relative;container-type:inline-size}.court-3{--board-w:min(29cqi, 150px)}@media (height>=860px) and (width>=600px){.court{height:340px}}.court-lines{border:3px solid var(--court-line);pointer-events:none;border-bottom:0;border-radius:999px 999px 0 0;width:min(62%,280px);height:104px;position:absolute;bottom:-2px;left:50%;translate:-50%}.hoop,.hoop-front{top:var(--y);left:calc(var(--x) - var(--board-w) / 2);width:var(--board-w);flex-direction:column;align-items:center;display:flex;position:absolute}.hoop{z-index:1;color:var(--text);cursor:pointer;background:0 0;border:0;padding:0}.hoop:focus-visible{outline:none}.hoop:focus-visible .board{outline:3px solid var(--sky);outline-offset:3px}.hoop-front{z-index:4;pointer-events:none}.board{width:100%;height:var(--board-h);border:3px solid var(--board-edge);background:var(--board);box-shadow:0 3px 0 var(--board-edge);border-radius:10px;place-items:center;padding:4px 6px 10px;transition:border-color .15s,box-shadow .15s,opacity .2s,transform .15s;display:grid;position:relative}.board:after{content:"";border:2px solid var(--board-edge);border-bottom:0;border-radius:2px 2px 0 0;width:30%;height:8px;position:absolute;bottom:3px;left:50%;translate:-50%}.board-text{text-align:center;overflow-wrap:anywhere;place-items:center;width:100%;height:100%;font-weight:900;line-height:1.05;display:grid;overflow:hidden}.board.is-xl .board-text{font-size:clamp(1.5rem,8cqi,2.2rem)}.board.is-l .board-text{font-size:clamp(1.1rem,5.6cqi,1.6rem)}.board.is-m .board-text{font-size:clamp(.92rem,4.6cqi,1.5rem)}.board.is-s .board-text{font-size:clamp(.78rem,3.7cqi,1.25rem)}.board.is-pic{padding:3px}.board.is-pic:after{display:none}.board-text .frac{font-size:.9em}.board-key{color:var(--text-faint);font-size:.68rem;font-weight:900;position:absolute;top:2px;left:5px}@media (pointer:coarse){.board-key{display:none}}.rim{width:var(--rim-w);border:4px solid var(--rim);border-radius:50%;height:14px;margin-top:-2px;display:block}.rim-back{clip-path:inset(0 0 50%)}.rim-front{clip-path:inset(50% 0 0)}.board-space{height:var(--board-h);display:block}.net{width:calc(var(--rim-w) * .9);fill:none;height:28px;stroke:var(--net);stroke-width:1.6px;stroke-linecap:round;transform-origin:top;margin-top:-8px;display:block;overflow:visible}.hoop-front.is-swish .net{animation:.45s ease-out swish}@keyframes swish{30%{transform:scale(.9,1.3)}60%{transform:scale(1.05,.92)}}.hoop.is-aim .board{border-color:var(--primary);box-shadow:0 3px 0 var(--primary-press), 0 0 0 4px var(--primary-soft);transform:translateY(-2px)}.hoop.is-right .board{border-color:var(--good);box-shadow:0 3px 0 var(--good-press), 0 0 0 4px var(--good-soft)}.hoop.is-wrong .board{border-color:var(--coral);box-shadow:0 3px 0 var(--coral-press), 0 0 0 4px var(--coral-soft)}.hoop.is-dim .board{opacity:.5}.aim{z-index:2;pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.aim polyline{fill:none;stroke:var(--primary);stroke-width:4px;stroke-dasharray:2 10;stroke-linecap:round;opacity:.8}.ball-spot{z-index:3;pointer-events:none;width:62px;height:62px;position:absolute;bottom:16px;left:50%;translate:-50%}.ball{transform-origin:50%;will-change:transform;width:62px;height:62px}.ball-pull{transition:transform .12s ease-out}.ball svg{filter:drop-shadow(0 2px #0000001f);display:block}.ball-shadow{background:#3c28142e;border-radius:50%;width:48px;height:10px;transition:opacity .3s;position:absolute;bottom:-6px;left:50%;translate:-50%}.ball-shadow.is-away{opacity:0}.ball-hint{border-top:4px solid var(--primary);border-left:4px solid var(--primary);opacity:0;border-radius:3px;width:18px;height:18px;animation:1.6s ease-in-out 1.2s infinite hint;position:absolute;bottom:74px;left:50%;translate:-50%;rotate:45deg}@keyframes hint{0%{opacity:0;transform:translate(6px,6px)}40%{opacity:.9}to{opacity:0;transform:translate(-6px,-6px)}}@media (prefers-reduced-motion:reduce){.ball-hint{opacity:.8;animation:none}.hoop-front.is-swish .net{animation:none}}.c-primary{color:var(--primary)}.pill{background:var(--surface-2);border-radius:99px;align-items:center;gap:6px;padding:6px 12px;font-weight:700;display:inline-flex}.price{align-items:center;gap:4px;font-weight:900;display:inline-flex}.btn .price{background:#fff3;border-radius:8px;margin-left:4px;padding:2px 8px}.btn-ghost .price{color:var(--sky-text);background:0 0;margin:0;padding:0}.btn-ghost:disabled .price{color:var(--text-faint)}.week{grid-template-columns:repeat(7,1fr);gap:6px;width:100%;display:grid}.week-day{justify-items:center;gap:4px;display:grid}.week-dot{border:2px solid var(--border);background:var(--surface-2);width:34px;height:34px;color:var(--gold);border-radius:50%;place-items:center;display:grid}.week-day.on .week-dot{border-color:var(--gold);background:var(--gold-soft)}.week-day.today .week-dot{outline:2px solid var(--primary);outline-offset:2px}.week-name{color:var(--text-muted);font-size:.8rem;font-weight:800}.onboard{max-width:520px;min-height:100dvh;padding:calc(10px + env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));flex-direction:column;margin:0 auto;display:flex}.onboard-top{justify-content:space-between;align-items:center;display:flex}.onboard-dots{gap:8px;display:flex}.onboard-dots span{background:var(--surface-3);border-radius:99px;width:34px;height:8px;transition:background .3s}.onboard-dots span.on{background:var(--primary)}.onboard-body{flex-direction:column;flex:1;gap:14px;padding-top:18px;animation:.3s q-in;display:flex}.onboard-body h1{font-size:1.75rem}.onboard-body>.btn{margin-top:auto}.onboard-welcome{text-align:center;justify-content:center;align-items:center}.onboard-welcome h1{color:var(--primary-text);font-size:2.3rem}.onboard-welcome>.btn{margin-top:26px}.onboard-lead{max-width:340px;font-size:1.1rem}.welcome-buddies{gap:12px;font-size:46px;display:flex}.welcome-buddies span{animation:1s ease-in-out infinite alternate hop}.welcome-buddies span:nth-child(2){animation-delay:.2s}.welcome-buddies span:nth-child(3){animation-delay:.4s}.grade-list{gap:10px;display:grid}.grade-row{border:2px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:0 3px 0 var(--border);text-align:left;align-items:center;gap:14px;padding:12px 14px;display:flex}.grade-row.active{border-color:var(--sky);background:var(--sky-soft);box-shadow:0 3px 0 var(--sky)}.grade-row-num{background:var(--surface-2);border-radius:12px;flex:none;place-items:center;width:44px;height:44px;font-size:1.3rem;font-weight:900;display:grid}.grade-row.active .grade-row-num{background:var(--sky);color:var(--on-color)}.grade-row-text{display:block}.buddy-pick{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.buddy-option{border:2px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:0 3px 0 var(--border);justify-items:center;gap:4px;padding:14px 6px;font-weight:800;display:grid}.buddy-option.active{border-color:var(--sky);background:var(--sky-soft);box-shadow:0 3px 0 var(--sky)}.buddy-option-emoji{font-size:48px;line-height:1.1}.field{gap:6px;display:grid}.field-label{color:var(--text-muted);letter-spacing:.05em;text-transform:uppercase;font-size:.85rem;font-weight:900}.input{border:2px solid var(--border);background:var(--surface-2);border-radius:14px;width:100%;height:50px;padding:0 14px;font-size:1.05rem;font-weight:700}.input:focus{border-color:var(--sky);background:var(--surface);outline:none}.balance{border:2px solid var(--border);background:var(--surface);border-radius:12px;align-items:center;gap:6px;padding:6px 12px;font-size:1.1rem;font-weight:900;display:inline-flex}.shop-list{gap:10px;display:grid}.shop-row{align-items:center;gap:14px;padding:12px 14px;display:flex}.shop-icon{background:var(--tone-soft);width:52px;height:52px;color:var(--tone);border-radius:16px;flex:none;place-items:center;display:grid}.shop-text{flex:1;min-width:0;display:grid}.shop-row .btn{flex:none;min-width:76px}.avatar-grid{grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:10px;margin-top:12px;display:grid}.avatar-card{text-align:center;justify-items:center;gap:6px;padding:14px 8px 10px;display:grid}.avatar-card.in-use{border-color:var(--primary);background:var(--primary-soft)}.avatar-emoji{font-size:46px;line-height:1.1}.avatar-card .btn{width:100%}.avatar-status{height:40px;color:var(--primary-text);place-items:center;margin-bottom:4px;font-weight:900;display:grid}.sticker-reveal{font-size:96px;line-height:1.1;animation:.6s cubic-bezier(.3,1.6,.5,1) both star-pop}.profile-head{align-items:center;gap:16px;display:flex}.profile-avatar{background:var(--surface-2);border-radius:26px;flex:none;place-items:center;width:84px;height:84px;font-size:54px;display:grid}.profile-info{flex:1;gap:6px;min-width:0;display:grid}.profile-info h1{overflow-wrap:anywhere;font-size:1.5rem}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px;display:grid}.stat-tile{align-items:center;gap:12px;padding:12px 14px;display:flex}.stat-value{font-size:1.35rem;font-weight:900;line-height:1.1}.badge-list{gap:8px;display:grid}.badge-row{align-items:center;gap:14px;padding:12px 14px;display:flex}.badge-row:not(.have) .badge-icon{filter:grayscale();opacity:.55}.badge-row.have{border-color:color-mix(in srgb, var(--gold) 55%, var(--border))}.badge-icon{background:var(--surface-2);border-radius:14px;flex:none;place-items:center;width:50px;height:50px;font-size:28px;display:grid}.badge-row.have .badge-icon{background:var(--gold-soft)}.badge-body{flex:1;gap:4px;min-width:0;display:grid}.badge-top{justify-content:space-between;align-items:center;gap:8px;display:flex}.badge-body .bar{height:8px}.badge-body .bar-fill{min-width:8px}.badge-body .bar-fill:after{display:none}.badge-done{color:var(--primary-text);align-items:center;gap:3px;font-size:.85rem;font-weight:900;display:inline-flex}.sticker-grid{grid-template-columns:repeat(auto-fill,minmax(68px,1fr));gap:10px;margin-top:12px;display:grid}.sticker{aspect-ratio:1;border:2px dashed var(--border-strong);color:var(--text-faint);border-radius:18px;place-items:center;font-size:1.4rem;font-weight:900;display:grid;position:relative}.sticker.have{border:2px solid var(--border);background:var(--surface);font-size:36px}.sticker.have.rarity-rare{border-color:color-mix(in srgb, var(--sky) 60%, var(--border))}.sticker.have.rarity-epic{border-color:var(--gold);background:var(--gold-soft)}.sticker-count{color:var(--text-muted);font-size:.75rem;font-weight:900;position:absolute;bottom:2px;right:4px}.settings-card{gap:12px;margin-top:12px;display:grid}.grade-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}@media (width>=480px){.grade-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}.grade-btn,.goal-btn{border:2px solid var(--border);background:var(--surface);box-shadow:0 3px 0 var(--border);border-radius:14px;justify-items:center;gap:2px;padding:10px 4px;transition:transform 80ms;display:grid}.grade-btn:active,.goal-btn:active{box-shadow:none;transform:translateY(3px)}.grade-btn.active,.goal-btn.active{border-color:var(--sky);background:var(--sky-soft);box-shadow:0 3px 0 var(--sky);color:var(--sky-text)}.grade-num{font-size:1.6rem;font-weight:900;line-height:1.1}.grade-word{font-size:.75rem;font-weight:800}.goal-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}@media (width>=520px){.goal-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}.toggle-row{cursor:pointer;justify-content:space-between;align-items:center;gap:16px;display:flex}.toggle-text{display:block}.divider{background:var(--border);height:2px}.reset-btn{--btn-fg:var(--coral-text);justify-self:start}.app-note{text-align:center;margin-top:18px}.grown-up-form,.account-form{gap:12px;width:100%;display:grid}.grown-up-form .input{text-align:center;letter-spacing:.2em}.form-error{color:var(--coral-text);font-weight:800}.child-list{gap:8px;width:100%;display:grid}.child-btn{border:2px solid var(--border);background:var(--surface);width:100%;color:inherit;text-align:left;cursor:pointer;border-radius:16px;align-items:center;gap:12px;padding:10px 12px;display:flex}.child-btn:disabled{cursor:default;opacity:.6}.child-btn.is-current{border-color:var(--primary);background:var(--primary-soft)}.child-avatar{font-size:2rem;line-height:1}.child-text{gap:2px;min-width:0;display:grid}.account-buttons{gap:8px;display:grid}.sync-status.is-saved:before{content:"✓ ";color:var(--good);font-weight:900}.code-input{text-align:center;letter-spacing:.4em;font-size:1.5rem}.child-list-block{gap:10px;margin-top:4px;display:grid}.child-row{align-items:center;gap:8px;display:flex}.child-row .child-btn{flex:1;min-width:0}.account-actions{flex-wrap:wrap;gap:8px;margin-top:4px;display:flex}.account-actions .form-error{flex-basis:100%}