:root{color-scheme:dark;--bg:#101a24;--panel:#192632;--line:#2b3b49;--muted:#a7b7c6;--gold:#ffd15c;--blue:#5ed8f3;--green:#9cdeac;font-family:ui-rounded,'Arial Rounded MT Bold',system-ui,sans-serif;color:#f1f5f9;background:var(--bg)}*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--blue);outline-offset:5px}button{color:inherit}h1,h2,h3,p{margin:0}p{line-height:1.6}.muted{color:var(--muted)}.eyebrow{font-size:11px;font-weight:800;letter-spacing:2px;text-transform:uppercase}.shell{max-width:1240px;margin:auto;display:grid;grid-template-columns:210px 1fr;min-height:100vh}.sidebar{padding:36px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:42px}.brand{display:flex;align-items:center;gap:12px;font-weight:850;line-height:1.15;font-size:17px;letter-spacing:-.5px}.brand img{width:46px;height:46px;border-radius:14px}.nav{display:grid;gap:10px}.nav a{padding:15px;border-radius:14px;color:var(--muted);font-weight:700;display:flex;gap:14px;align-items:center}.nav .active{background:#203943;color:var(--blue);box-shadow:inset 0 0 0 1px #385766}.nav svg{width:22px;height:22px}.sidebar .foot{margin-top:auto;font-size:12px;line-height:1.8;color:var(--muted)}.main{padding:32px 42px 60px}.topline{display:flex;justify-content:space-between;align-items:center;margin-bottom:36px}.pill{border:1px solid var(--line);border-radius:30px;padding:9px 15px;font-size:13px;font-weight:750;display:inline-flex;gap:8px;align-items:center}.gold{color:var(--gold)}.topstats{display:flex;gap:10px}.heading{font-size:36px;letter-spacing:-1.5px;line-height:1.15;margin:10px 0}.columns{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:26px;margin-top:26px}.hero{position:relative;overflow:hidden;border:1px solid #41616b;border-radius:24px;padding:28px;background:linear-gradient(125deg,#253e47,#192b37);min-height:248px}.hero h2{font-size:28px;letter-spacing:-.8px;max-width:240px;margin:12px 0}.hero p{max-width:230px;font-size:14px}.hero img{position:absolute;width:132px;height:132px;right:20px;top:28px;border-radius:32px;transform:rotate(8deg);box-shadow:0 14px 36px #0005;animation:float 5s ease-in-out infinite}.primary{border:0;border-bottom:4px solid #bb8a28;border-radius:14px;padding:15px 22px;background:var(--gold);color:#252317;font-weight:850;transition:transform .15s,filter .15s;min-height:52px}.primary:hover{filter:brightness(1.07)}.primary:active{transform:translateY(3px);border-bottom-width:1px}.primary:disabled{background:#30424e;border-color:#24333e;color:#8294a3}.hero .primary{margin-top:25px;min-width:190px}.section-title{display:flex;justify-content:space-between;align-items:center;margin:30px 0 16px}.section-title h2{font-size:18px}.section-title span{font-size:12px;color:var(--muted)}.unit{display:flex;gap:16px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:19px;margin-bottom:10px;transition:transform .2s,border-color .2s}.unit:hover{transform:translateY(-2px);border-color:#597080}.unit-number{display:grid;place-items:center;flex-shrink:0;width:43px;height:43px;border-radius:13px;background:#283b47;color:var(--blue);font-size:19px;font-weight:800}.unit h3{font-size:15px;margin-bottom:5px}.unit p{font-size:12px;color:var(--muted)}.unit .arrow{margin-left:auto;color:var(--muted)}.sidecard{padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:20px;margin-bottom:16px}.sidecard h3{font-size:15px;margin-bottom:12px}.sidecard p{font-size:13px;color:var(--muted)}.ring{width:116px;height:116px;border-radius:50%;background:conic-gradient(var(--gold) var(--angle),#2b3b49 0);padding:8px;margin:24px auto}.ring>div{height:100%;border-radius:50%;background:var(--panel);display:grid;place-content:center;text-align:center}.ring strong{font-size:27px}.ring small{color:var(--muted);font-size:11px}.small-link{display:block;margin-top:15px;font-size:13px;color:var(--blue);font-weight:700}.mobile-brand{display:none}.lesson{max-width:650px;margin:auto;padding:30px 24px;min-height:100dvh;display:flex;flex-direction:column}.lesson-header{display:flex;gap:22px;align-items:center}.icon-btn{border:1px solid var(--line);border-radius:13px;background:transparent;width:44px;height:44px;font-size:23px}.track{height:12px;flex:1;background:#293c48;border-radius:20px;overflow:hidden}.fill{height:100%;background:linear-gradient(90deg,var(--blue),#a3edf5);border-radius:20px;transition:width .45s cubic-bezier(.22,1,.36,1)}.count{font-size:13px;color:var(--muted);min-width:40px}.question{padding:48px 0 30px;animation:enter .3s ease-out}.question h1{font-size:26px;line-height:1.4;letter-spacing:-.7px;margin-top:15px}.equation{font-size:42px;font-weight:800;text-align:center;letter-spacing:1px;padding:35px 12px;margin:25px 0;background:var(--panel);border:1px solid var(--line);border-radius:22px}.choices{display:grid;gap:13px}.choice{display:flex;align-items:center;gap:16px;text-align:left;width:100%;padding:18px;border:2px solid var(--line);border-bottom-width:4px;border-radius:16px;background:transparent;font-weight:700;transition:background .18s,transform .18s,border-color .18s}.choice b{border:1px solid #516471;border-radius:8px;padding:4px 9px;color:var(--muted);font-size:12px}.choice.selected{background:#203f4c;border-color:var(--blue)}.choice.correct{background:#233e34;border-color:var(--green)}.choice.wrong{background:#442e30;border-color:#f5a599;animation:shake .25s}.answer{width:100%;padding:20px;background:var(--panel);border:2px solid var(--line);border-radius:16px;font-size:23px;text-align:center}.lesson-footer{margin-top:auto;border-top:1px solid var(--line);padding-top:22px;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:110px}.feedback{font-size:14px;color:var(--muted)}.feedback strong{display:block;font-size:18px;color:var(--green);margin-bottom:4px}.feedback.error strong{color:#f5a599}.finish{text-align:center;max-width:540px;margin:auto;padding:60px 24px;animation:enter .5s}.finish img{width:150px;border-radius:36px;animation:pop .6s}.finish h1{font-size:38px;letter-spacing:-1px;margin:30px 0 12px}.results{display:flex;gap:14px;margin:32px 0}.results>div{flex:1;border:1px solid var(--line);border-radius:18px;padding:22px 12px}.results strong{display:block;font-size:28px;color:var(--gold);margin-bottom:6px}.results span{font-size:12px;color:var(--muted)}.finish .primary{width:100%}.subtle{border:0;background:none;color:var(--muted);padding:18px}.notice{color:var(--muted);font-size:12px;margin-top:20px}.confetti{position:fixed;pointer-events:none;top:-20px;width:9px;height:16px;animation:fall 1.8s ease-in forwards}.page{animation:enter .35s ease-out}@keyframes enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes float{50%{transform:translateY(-7px) rotate(5deg)}}@keyframes pop{from{transform:scale(.65);opacity:0}70%{transform:scale(1.08)}to{transform:scale(1);opacity:1}}@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}@keyframes fall{to{transform:translateY(100vh) rotate(400deg);opacity:0}}@media(max-width:1100px){.columns{grid-template-columns:1fr}.aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.hero img{width:145px;height:145px;right:34px}.hero h2,.hero p{max-width:65%}}@media(max-width:700px){.shell{display:block}.sidebar{position:fixed;z-index:10;bottom:0;left:0;right:0;background:#101a24f5;border:0;border-top:1px solid var(--line);padding:8px 10px max(8px,env(safe-area-inset-bottom));display:block}.sidebar .brand,.sidebar .foot{display:none}.nav{display:flex;justify-content:space-around;gap:3px}.nav a{flex-direction:column;font-size:10px;gap:5px;padding:9px 16px}.main{padding:22px 20px 105px}.mobile-brand{display:flex;margin-bottom:26px}.topline{margin-bottom:25px}.topline .eyebrow{font-size:10px}.pill{padding:8px 10px;font-size:11px}.heading{font-size:31px}.columns{margin-top:24px}.hero{padding:23px;min-height:270px}.hero h2{font-size:25px;max-width:61%}.hero p{max-width:58%;font-size:13px}.hero img{width:105px;height:105px;right:17px;top:45px}.hero .primary{width:100%;margin-top:26px}.aside{grid-template-columns:1fr}.aside .sidecard{margin:0}.lesson{padding:20px 20px max(20px,env(safe-area-inset-bottom))}.question{padding-top:35px}.question h1{font-size:23px}.equation{font-size:35px;padding:28px 10px}.lesson-footer{flex-direction:column;align-items:stretch;gap:16px}.lesson-footer .primary{width:100%}.feedback{min-height:40px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* In-lesson motion: responsive taps, readable math, and compact rewards. */
.lesson-header{gap:14px}.combo{font-size:13px;font-weight:850;white-space:nowrap;color:var(--blue);border:1px solid #355361;padding:7px 9px;border-radius:12px}.combo.charged{color:var(--gold);border-color:#8a723d;background:#352f20}.equation{position:relative;overflow:visible;padding-bottom:48px}.math-token{display:inline-block;white-space:pre}.energy-reward{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);font-size:12px;letter-spacing:.5px;font-weight:850;color:var(--gold);opacity:0;white-space:nowrap}.energy-reward.visible{opacity:1}.answer-spark{position:fixed;z-index:30;pointer-events:none;width:7px;height:7px;border-radius:2px}.lesson-footer{border-radius:18px 18px 0 0;padding:20px;transition:background .2s,border-color .2s}.lesson-footer.success-panel{background:#19362d;border-color:#396647}.lesson-footer.retry-panel{background:#38272d;border-color:#6c424a}.success-panel .primary{background:var(--green);border-color:#5b9f6a}.retry-panel .primary:not(:disabled){background:#f5b7a9;border-color:#ba7569}.choice{position:relative;will-change:transform}.choice:active:not(:disabled){transform:translateY(3px)}.choice.selected b{background:var(--blue);color:#102631;border-color:var(--blue)}.choice.correct b{background:var(--green);border-color:var(--green);color:#142e1e}.choice.correct::after{content:'✓';margin-left:auto;color:var(--green);font-size:21px}.answer:disabled{opacity:1;color:var(--green);border-color:var(--green)}.feedback strong::before{content:'✓ ';}.feedback.error strong::before{content:'↻ ';}.question{animation:question-arrive .3s ease-out}@keyframes question-arrive{from{opacity:0;transform:translateX(22px)}to{opacity:1;transform:translateX(0)}}@media(max-width:700px){.lesson-header{gap:10px}.combo{padding:6px;font-size:12px}.lesson-footer{padding:18px 15px}.equation{padding-bottom:46px}.choice{min-height:65px}}@media(prefers-reduced-motion:reduce){.choice:active:not(:disabled){transform:none}.answer-spark{display:none}}

/* Bundled type: expressive display lettering with a quieter reading face. */
@font-face{font-family:Fredoka;src:url('assets/fonts/fredoka.woff2') format('woff2');font-weight:300 700;font-display:swap}
@font-face{font-family:Nunito;src:url('assets/fonts/nunito.woff2') format('woff2');font-weight:200 1000;font-display:swap}
:root{font-family:Nunito,system-ui,sans-serif}.brand,.heading,.hero h2,.finish h1,.section-title h2,.streak-number{font-family:Fredoka,Nunito,sans-serif;font-weight:600;letter-spacing:-.5px}.brand{font-size:21px;line-height:1.05}.brand img{width:48px;height:57px;border-radius:0;object-fit:contain}.heading{font-size:40px;line-height:1.12}.hero h2{font-size:31px;line-height:1.15}.question h1{font-family:Nunito,sans-serif;font-weight:850;letter-spacing:-.5px}.equation{font-family:Nunito,system-ui,sans-serif;font-variant-numeric:tabular-nums}.hero img{object-fit:contain;border-radius:0;box-shadow:none;width:155px;height:175px;right:15px;top:17px;filter:drop-shadow(0 9px 18px #50c9ef25)}.finish img{object-fit:contain;width:155px;height:175px;border-radius:0;filter:drop-shadow(0 12px 22px #50c9ef35)}.activity-card{padding:20px}.activity-heading{display:flex;align-items:center;justify-content:space-between}.activity-heading>span:last-child{color:var(--gold);font-size:30px}.activity-heading .eyebrow{font-size:9px;letter-spacing:1.4px}.streak-number{font-size:62px;line-height:1;margin:12px 0 15px;color:var(--gold)}.streak-number>span{display:block;margin-top:8px;color:#eef4f8;font:800 14px Nunito,sans-serif;letter-spacing:0}.week{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:4px;margin:20px 0 12px}.day{text-align:center;font-size:10px;color:var(--muted)}.day>span{display:block;margin-bottom:7px}.day b{display:grid;place-items:center;aspect-ratio:1;border-radius:50%;background:#253643;color:#78909e;font-size:13px;border:1px solid transparent}.day.visited b{background:#203f50;color:var(--blue);border-color:#477889}.day.practiced b{background:var(--gold);color:#473209}.day.today b{outline:2px solid #eef4f8;outline-offset:2px}.calendar-legend{display:flex;justify-content:center;gap:15px;font-size:10px;color:var(--muted)}.calendar-legend>span:first-child{color:var(--blue)}.calendar-legend>span:last-child{color:var(--gold)}.activity-totals{display:grid;grid-template-columns:repeat(3,1fr);margin-top:20px;padding-top:16px;border-top:1px solid var(--line);text-align:center;gap:5px}.activity-totals strong{display:block;font-size:21px;color:#fff}.activity-totals span{display:block;font-size:9px;color:var(--muted);line-height:1.3}.activity-card .activity-note{font-size:10px;margin-top:16px;line-height:1.5}.finish-streak{display:inline-block;color:var(--gold);background:#352f20;border:1px solid #746238;border-radius:30px;font-size:13px;font-weight:800;padding:10px 16px;margin-top:22px}@media(max-width:700px){.heading{font-size:35px}.hero h2{font-size:28px;max-width:65%}.hero img{width:107px;height:142px;top:34px;right:14px}.activity-card{padding:24px}.week{gap:10px}.day b{max-width:37px;width:100%;margin:auto}.activity-heading .eyebrow{font-size:11px}.activity-totals span{font-size:11px}.calendar-legend{font-size:12px}}
@media(max-width:700px){.columns{display:flex;flex-direction:column;gap:22px}.columns>section{display:contents}.columns .hero{order:0}.columns .aside{order:1}.columns .aside>.sidecard:not(.activity-card){display:none}.columns .section-title{order:2;margin:8px 0 0}.columns #units{order:3}.hero h2{font-size:25px}.mobile-brand img{width:45px}}

/* Learn is a lesson world, with secondary information tucked into dialogs. */
.learn-shell{max-width:1280px}.learn-shell .sidebar{position:sticky;top:0;height:100dvh}.learn-main{min-width:0}.learn-top{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 44px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#101a24f5;z-index:15;backdrop-filter:blur(12px)}.course-badge{display:flex;align-items:center;gap:9px;font:500 23px Fredoka,sans-serif}.course-badge img{width:36px;height:42px;object-fit:contain}.course-badge b{color:var(--blue);font-weight:500}.streak-button{background:transparent;color:var(--gold);font-size:17px;min-width:65px;justify-content:center}.journey{max-width:820px;padding:32px 34px 60px;margin:auto}.unit-banner{background:linear-gradient(115deg,#2d6878,#245360);border:1px solid #478291;border-bottom:5px solid #163942;border-radius:22px;padding:23px 26px;display:flex;align-items:center;justify-content:space-between;position:relative;z-index:2}.unit-banner .eyebrow{color:#a9deeb;letter-spacing:1.6px;font-size:10px}.unit-banner h1{font:550 32px Fredoka,sans-serif;margin:6px 0}.unit-banner p{font-size:13px;color:#c8e2e9}.course-menu{display:grid;place-items:center;width:45px;height:45px;background:#ffffff0b;border:1px solid #78a7b7;border-bottom-width:3px;border-radius:12px;margin-left:12px}.course-menu svg{width:24px;height:24px}.world{position:relative;overflow:hidden;isolation:isolate;background:radial-gradient(ellipse 280px 310px at 55% 200px,#24485a45,transparent 90%)}.path-map{position:relative;width:420px;max-width:100%;margin:35px auto 0}.path-line{position:absolute;left:0;top:0;width:100%;height:2110px;overflow:visible;pointer-events:none;z-index:-1}.path-line path{fill:none;stroke:#2a414f;stroke-width:10;stroke-linecap:round;stroke-dasharray:2 20}.lesson-path{list-style:none;margin:0;padding:0}.path-step{height:180px;position:relative;display:flex;flex-direction:column;align-items:center;padding-top:18px;left:var(--shift)}.path-node{width:88px;height:80px;border-radius:50%;background:linear-gradient(#355262,#2b414f);border:3px solid #456474;box-shadow:0 9px 0 #1b2d39,0 13px 0 #09131b;font:550 33px Fredoka,sans-serif;color:#8eabb9;position:relative;transition:transform .15s,filter .15s}.path-node::before{content:'';position:absolute;top:7px;left:16px;right:16px;border-top:3px solid #ffffff0e;border-radius:50%;height:12px}.path-node:hover{filter:brightness(1.2);transform:translateY(-3px)}.path-node:active{transform:translateY(6px);box-shadow:0 3px 0 #1b2d39,0 6px 0 #09131b}.path-caption{font-size:12px;font-weight:800;color:#8da7b6;margin-top:23px;text-align:center;max-width:170px}.next-step .path-node{background:linear-gradient(#ffe98a,#ffc542);border-color:#ffde72;box-shadow:0 9px 0 #ad761a,0 14px 0 #09131b,0 0 0 12px #ffce5410;color:#634714;animation:node-breathe 2.8s ease-in-out infinite}.next-step .path-caption{color:var(--gold)}.next-step{z-index:3}.done-step .path-node{background:#56bcd0;border-color:#8be9f4;color:#153947;box-shadow:0 9px 0 #26778a,0 13px 0 #09131b}.start-pointer{position:absolute;top:-21px;font:800 11px Nunito,sans-serif;letter-spacing:1px;color:var(--gold);background:#273641;border:2px solid #6f6444;border-radius:10px;padding:7px 12px;animation:marker-bob 2.6s ease-in-out infinite}.start-pointer::after{content:'';position:absolute;bottom:-6px;left:calc(50% - 4px);width:8px;height:8px;background:#273641;border-right:2px solid #6f6444;border-bottom:2px solid #6f6444;transform:rotate(45deg)}.node-preview{position:absolute;left:calc(50% + 66px);top:6px;width:230px;padding:19px;background:#233b46;border:1px solid #4b7381;border-bottom:4px solid #152b36;border-radius:18px;box-shadow:0 12px 35px #0003;display:grid;gap:7px}.node-preview:before{content:'';position:absolute;top:30px;left:-7px;width:12px;height:12px;background:#233b46;border-bottom:1px solid #4b7381;border-left:1px solid #4b7381;transform:rotate(45deg)}.node-preview .eyebrow{font-size:9px;color:var(--blue)}.node-preview strong{font:500 20px Fredoka,sans-serif}.node-preview>span:not(.eyebrow){font-size:12px;color:#bbced8}.node-preview .primary{margin-top:5px;padding:12px;min-height:46px;font-size:13px}.node-preview small{font-size:10px;color:var(--muted)}.world-decoration{position:absolute;left:calc(50% + 86px);top:310px;width:220px;height:260px;z-index:-1;pointer-events:none}.world-decoration img{position:absolute;width:150px;left:30px;top:30px;filter:drop-shadow(0 14px 25px #4cdfff25);animation:world-float 5s ease-in-out infinite}.orbit{position:absolute;width:220px;height:90px;border:1px solid #37758a55;top:120px;border-radius:50%;transform:rotate(-25deg)}.orbit-two{transform:rotate(25deg);top:100px}.floating-math{position:absolute;font:500 17px Fredoka,sans-serif;color:#678c9f}.math-one{left:1px;top:4px;transform:rotate(-10deg)}.math-two{left:50px;bottom:25px;transform:rotate(8deg)}.star{position:absolute;color:#ffd964;font-size:25px}.star-one{right:0;top:20px}.star-two{left:7px;bottom:58px;color:var(--blue)}.next-unit{text-align:center;border-top:2px solid var(--line);padding:32px 15px}.next-unit .eyebrow{color:#a99deb}.next-unit h2{font:500 25px Fredoka,sans-serif;margin:10px}.next-unit a{font-size:13px;color:var(--blue)}.path-note{font-size:11px;max-width:470px;text-align:center;color:var(--muted);margin:16px auto}.learn-dialog{border:1px solid #456474;border-radius:24px;color:#fff;background:var(--bg);padding:50px 24px 24px;width:min(440px,calc(100% - 30px));max-height:85dvh}.learn-dialog::backdrop{background:#030d16b8;backdrop-filter:blur(5px)}.dialog-close{position:absolute;right:12px;top:10px;width:32px;height:32px}.learn-dialog .sidecard{margin:0}.course-list h2,.figure-detail h2{font:500 26px Fredoka,sans-serif;margin:4px 0 22px}.figure-detail .eyebrow{color:var(--blue)}.figure-detail p{color:var(--muted);font-size:14px;margin-bottom:20px}.figure-detail .primary{width:100%}.course-list .unit{padding:13px}.course-list .unit h3{font-size:13px}.course-list .unit-number{width:33px;height:33px}.learn-dialog .activity-heading .eyebrow{font-size:11px}.learn-dialog .day b{max-width:36px;margin:auto}.learn-dialog .activity-totals span{font-size:11px}@keyframes marker-bob{50%{transform:translateY(-4px)}}@keyframes node-breathe{50%{box-shadow:0 9px 0 #ad761a,0 14px 0 #09131b,0 0 0 17px #ffce5408}}@keyframes world-float{50%{transform:translateY(-9px) rotate(5deg)}}@media(max-width:1000px){.journey{padding:25px 20px 50px}.node-preview{left:calc(50% + 54px);width:190px}.world-decoration{left:calc(50% + 55px);transform:scale(.85)}}@media(max-width:700px){.learn-shell .sidebar{position:fixed;top:auto;bottom:0;height:auto}.learn-top{height:72px;padding:0 20px}.course-badge{font-size:21px}.learn-top .pill{font-size:14px}.journey{padding:18px 16px 110px}.unit-banner{padding:18px;border-radius:18px}.unit-banner h1{font-size:27px}.unit-banner p{font-size:11px}.unit-banner .eyebrow{font-size:9px}.course-menu{width:38px;height:38px}.path-map{margin-top:50px;width:340px}.path-step{left:calc(var(--shift)*.78)}.path-line{width:340px;max-width:100%;height:2110px}.node-preview{position:relative;left:0;top:18px;width:250px;text-align:center;padding:16px;z-index:5}.node-preview::before{left:calc(50% - 6px);top:-7px;transform:rotate(135deg)}.next-step{height:380px}.path-line{display:none}.path-step::after{content:'';position:absolute;z-index:-1;top:125px;height:48px;border-left:5px dotted #2a414f;transform:rotate(-20deg)}.next-step::after{display:none}.world-decoration{top:560px;left:calc(50% + 38px);transform:scale(.65);transform-origin:top left}.path-caption{font-size:11px}.learn-dialog{padding:50px 16px 20px}}@media(prefers-reduced-motion:reduce){.path-node:hover,.path-node:active{transform:none}}

/* Landmarks are anchored to lessons, so the scenery follows the path on every screen. */
.world{background:radial-gradient(ellipse 250px 260px at 65% 450px,#21586a25,transparent),radial-gradient(ellipse 310px 290px at 25% 1050px,#50407522,transparent),radial-gradient(ellipse 320px 270px at 65% 1730px,#8b6e2320,transparent)}
.world::before{content:'';position:absolute;inset:0;z-index:-2;pointer-events:none;background-image:radial-gradient(circle,#55829c40 1px,transparent 1.5px),radial-gradient(circle,#b2975830 1px,transparent 1.5px);background-size:83px 101px,137px 173px;background-position:12px 42px,67px 21px;mask-image:linear-gradient(transparent,#000 12%,#000 92%,transparent)}
.path-art{position:absolute;top:-35px;width:165px;pointer-events:none;user-select:none;z-index:-1;text-align:center}.art-right{left:calc(50% + 100px)}.art-left{right:calc(50% + 100px)}.art-float{animation:scenery-drift 6s ease-in-out infinite;filter:drop-shadow(0 8px 17px #050f1933)}.path-art svg{width:100%;height:auto;display:block}.path-art>span{display:block;color:#82a7ba;font:500 13px Fredoka,sans-serif;letter-spacing:.2px;margin-top:-2px;transform:rotate(-5deg)}.art-left .art-float{animation-delay:-3s}.art-left>span{transform:rotate(5deg)}.art-spark{position:absolute;top:95px;left:-10px;color:#78c8dc;font-size:18px;animation:scenery-glint 4s ease-in-out infinite}.art-left .art-spark{left:auto;right:-10px;animation-delay:-2s}@keyframes scenery-drift{50%{transform:translateY(-7px) rotate(3deg)}}@keyframes scenery-glint{50%{opacity:.35;transform:scale(.7) rotate(15deg)}}@media(max-width:1000px){.path-art{width:145px}.art-right{left:calc(50% + 75px)}.art-left{right:calc(50% + 75px)}}@media(max-width:700px){.path-art{width:112px;top:4px}.art-right{left:calc(50% + 76px)}.art-left{right:calc(50% + 76px)}.path-art>span{font-size:10px;line-height:1.2;margin-top:4px}.art-spark{font-size:12px;top:60px}.world-decoration{top:550px;left:calc(50% + 25px);transform:scale(.58)}.world::before{background-size:73px 113px,127px 179px;opacity:.65}}@media(prefers-reduced-motion:reduce){.art-float,.art-spark{animation:none}}

.coach{margin-top:20px}.hint-toggle{background:none;border:0;color:var(--blue);font-weight:800;padding:9px 0;font-size:14px}.hint-copy{border-left:3px solid var(--blue);padding:12px 16px;background:#203642;border-radius:0 12px 12px 0;color:#cee3eb;font-size:14px;line-height:1.6}.balance-lab{margin-top:12px;border:1px solid #416374;border-radius:16px;overflow:hidden}.balance-lab summary{padding:15px;color:#b8dce7;font-weight:800;cursor:pointer;font-size:14px}.balance-lab summary small{font-size:10px;color:var(--muted);font-weight:600;margin-left:8px}.lab-body{padding:0 16px 16px}.lab-body>p{font-size:13px;color:var(--muted)}.balance-board{display:flex;justify-content:center;align-items:center;gap:15px;margin:20px 0;padding:18px 8px;background:#172c38;border-radius:16px}.balance-side{display:flex;align-items:center;gap:6px;flex:1;justify-content:center;padding-bottom:12px;border-bottom:4px solid #5791a0;border-radius:8px}.math-chip{display:inline-block;padding:10px;border-radius:10px;background:#2e4a58;font-size:22px;font-weight:800;white-space:nowrap}.math-chip.variable{background:#ffd267;color:#594113}.equal-sign{font-size:26px;color:var(--gold)}.balanced-win .balance-side{border-color:var(--green)}.operation-row{display:flex;gap:10px}.operation-row button{flex:1;padding:12px 8px;background:#284654;border:1px solid #5b8798;border-bottom-width:3px;border-radius:12px;font-size:12px;font-weight:800}.operation-row button:disabled{opacity:.5}.lab-message{margin-top:14px;min-height:42px}.lab-reset{padding:10px 0 0;border:0;background:none;color:var(--blue);font-size:12px;font-weight:800}.finish-note{color:var(--muted);font-size:13px;max-width:330px;margin:15px auto 0}.streak-new{animation:streak-secured .65s ease-out}@keyframes streak-secured{0%{transform:scale(.85);opacity:0}70%{transform:scale(1.08)}100%{transform:scale(1);opacity:1}}.lesson-footer .feedback{max-width:430px}.lesson-footer .feedback>span{font-size:13px;line-height:1.5;display:block}.lesson-footer .primary{flex-shrink:0}.lesson .question{padding-bottom:22px}@media(max-width:390px){.math-chip{font-size:19px;padding:8px}.balance-board{gap:9px}.balance-lab summary small{display:block;margin:5px 0 0}.lesson-header{gap:8px}}

.lesson-concept:not(:empty),.tutorial-copy{padding:18px;margin:16px 0;background:#1b303e;border:1px solid #355263;border-radius:16px;font-size:15px;line-height:1.65;overflow-wrap:anywhere}.lesson-concept .example-box,.tutorial-copy .example-box{margin-top:14px;padding:14px;background:#243e4c;border-radius:12px}.example-label,.example-title{color:var(--gold);font-weight:800}.example-item,.step{margin:7px 0}.highlight{color:var(--blue)}.conversion-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.fraction{display:inline-flex;flex-direction:column;text-align:center}.fraction-top{border-bottom:1px solid currentColor}.graph-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.graph-preview{grid-column:1/-1}.number-line{width:100%;display:block;background:#192632;border-radius:14px;margin:12px 0}.graph-controls label{font-size:12px;color:var(--muted)}.graph-controls input,.graph-controls select{width:100%;min-width:0;padding:10px 5px;border:1px solid #557285;background:#203541;color:#fff;border-radius:9px;margin-top:8px;font:inherit;min-height:44px}.course-list button.unit{width:100%;text-align:left}.question h1{overflow-wrap:anywhere}.equation-text{overflow-wrap:anywhere}.equation[hidden]{display:none}.lesson-concept svg{max-width:100%}.tutorial-copy img{max-width:100%}
.long-equation{font-size:26px;line-height:1.5}.equation .math-token{max-width:100%;white-space:pre-wrap;overflow-wrap:anywhere}.lesson-concept table,.tutorial-copy table{width:100%;table-layout:fixed}.lesson-concept td,.lesson-concept th{padding:5px;overflow-wrap:anywhere}@media(max-width:700px){.long-equation{font-size:23px}.unit-banner h1{overflow-wrap:anywhere}}

.account h2,.league h2{font:500 27px Fredoka,sans-serif;margin:10px 0 16px}.account p,.league p{color:var(--muted);font-size:14px}.account form{display:grid;gap:14px;margin-top:20px}.account label{display:grid;gap:7px;font-size:13px}.account input{width:100%;padding:13px;border:1px solid #587484;border-radius:10px;background:#1b303d;color:white;min-height:46px}.account-body>.primary{width:100%;margin-top:20px}.account .subtle{font-size:13px}.account-note{font-size:11px!important;margin-top:17px;line-height:1.6}.league>small{color:var(--blue);display:block;margin-top:12px;font-size:11px}.league ol{padding:0;list-style:none}.league li{display:flex;gap:14px;align-items:center;border-bottom:1px solid var(--line);padding:15px 10px}.league li>b{width:16px;color:var(--muted)}.league li>span{flex:1;font-weight:800}.league li small{display:block;font-size:10px;font-weight:500;color:var(--muted)}.league li>strong{font-size:13px;color:var(--gold)}.league .you{background:#21414c;border:1px solid #4f8b9b;border-radius:12px}.learn-top{padding-top:env(safe-area-inset-top);height:calc(88px + env(safe-area-inset-top))}.lesson{padding-top:max(20px,env(safe-area-inset-top));padding-bottom:max(20px,env(safe-area-inset-bottom))}@media(max-width:700px){.learn-top{height:calc(72px + env(safe-area-inset-top))}}

/* Two-step equations: a live, accessible equality board. */
.solver-studio{margin:22px 0;padding:20px;border:1px solid #3f6677;border-radius:22px;background:radial-gradient(ellipse at top right,#284351,#192a37 65%);box-shadow:0 14px 35px #0002}.studio-heading{display:flex;justify-content:space-between;align-items:center;color:var(--blue)}.studio-heading .eyebrow{font-size:10px;letter-spacing:1.5px}.studio-spark{color:var(--gold);font-size:30px}.solver-board{display:grid;grid-template-columns:minmax(0,1fr) 24px minmax(0,1fr);gap:10px;align-items:center;margin:20px 0 14px}.solver-board>b{color:var(--gold);font-size:28px;text-align:center}.solver-pan{border-bottom:4px solid #64b7ca;border-radius:14px;background:#102431;padding:18px 8px 8px;min-height:105px;text-align:center;display:grid;justify-items:center;align-content:center;gap:5px}.solver-value{font:500 clamp(24px,5vw,36px) Fredoka,sans-serif;white-space:nowrap}.solver-operation{min-height:24px;font-size:16px;font-weight:800;color:var(--gold)}.solver-operation.operation-visible{border-radius:7px;background:#ffd15c20;padding:1px 12px}.solver-caption{font-size:14px;line-height:1.5;color:#c6dae4;min-height:42px}.solver-trail p{font-size:12px;color:var(--green);margin-top:9px}.studio-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:8px}.solver-replay{border:0;background:none;color:var(--blue);font-size:12px;min-height:44px;font-weight:800}.solver-solved .solver-pan{border-color:var(--green)}.solver-studio .hint-toggle{min-height:44px;font-size:13px;text-align:left}.solver-studio .hint-toggle:disabled{color:var(--muted)}.solver-studio .hint-copy{margin-top:8px}.solver-summary{margin:20px auto 0;max-width:380px;padding:16px;background:#1b3540;border:1px solid #416878;border-radius:16px;color:#cce5ef;font-size:14px}.solver-summary strong{display:block;color:var(--gold);margin-bottom:6px}@media(max-width:390px){.solver-studio{padding:14px}.solver-board{gap:5px}.solver-value{font-size:25px}.studio-heading .eyebrow{letter-spacing:1px}}

/* Reckoning identity: amber cores, electric-blue bevels, crisp white glints. */
.rf-bolt{display:inline-block;object-fit:contain;vertical-align:middle;flex-shrink:0;filter:drop-shadow(0 2px 3px #003e7080)}.rf-bolt-small{width:26px;height:29px}.rf-bolt-medium{width:44px;height:48px}.rf-bolt-object{width:76%;height:88%;position:absolute;left:12%;top:6%;z-index:3}.pill .rf-bolt{margin:-6px -2px}.combo{display:inline-flex;align-items:center;gap:3px;white-space:nowrap}.combo .rf-bolt{width:19px;height:23px}.finish-streak .rf-bolt{margin-right:3px}.energy-reward .rf-bolt{width:22px;height:24px}.activity-heading .rf-bolt{width:44px!important;height:48px!important}.nav .rf-bolt{width:24px;height:26px}.studio-spark .rf-bolt{width:32px;height:35px}.rf-object{position:relative;display:block;width:112px;height:124px;flex-shrink:0;isolation:isolate}.rf-object-body{position:absolute;inset:14px 16px 20px;border:4px solid #3de0ff;border-radius:23px;background:linear-gradient(135deg,#0cf0ff 0%,#008edf 30%,#064e99 70%,#00adf4 100%);box-shadow:inset 3px 3px 0 #cbfbff,inset -5px -7px 0 #004581,0 7px 0 #062a52,0 9px 0 #08abe5;transform:rotate(-8deg);overflow:visible}.rf-object-shine{position:absolute;inset:5px 8px auto;height:18px;border-top:3px solid #f0ffff;border-radius:50%;opacity:.9;z-index:4}.rf-object-shadow{position:absolute;bottom:8px;left:12%;width:76%;height:13px;background:#00101dcc;border-radius:50%;filter:blur(2px)}.rf-glint{position:absolute;color:#e7fdff;font-size:22px;top:5px;right:5px;text-shadow:0 0 12px #04cfff;z-index:5}.rf-object.is-charged .rf-glint{animation:brand-glint 3.4s ease-in-out infinite}.rf-battery .rf-object-body{inset:17px 23px 18px;border-radius:17px}.rf-battery .rf-object-body::before{content:'';position:absolute;top:-13px;left:25%;width:50%;height:10px;border:2px solid #57e6ff;border-bottom:0;border-radius:6px 6px 0 0;background:#0587c4}.rf-charge-cells{position:absolute;inset:12px 8px;display:flex;flex-direction:column;gap:4px;transform:rotate(0)}.rf-charge-cells i{flex:1;border-radius:4px;background:#073855;border:1px solid #0f8fc3}.is-charged .rf-charge-cells i{background:linear-gradient(110deg,#fff8a0,#ffd000 55%,#ff9400);border-color:#fff68a}.rf-battery .rf-bolt-object{width:88%;height:90%;left:6%;top:5%}.rf-vault .rf-object-body{inset:30px 9px 22px;border-radius:17px 17px 12px 12px;background:linear-gradient(135deg,#fff778,#ffcb08 43%,#ed8605);border-color:#36dfff;box-shadow:inset 3px 3px #fffbbc,inset -5px -6px #d78003,0 7px #00558f,0 10px #12bfe6}.rf-vault .rf-object-body::before{content:'';position:absolute;left:-4px;right:-4px;top:22px;height:8px;background:linear-gradient(#5cedff,#0094d4);border:2px solid #0874a9}.rf-vault .rf-bolt-object{width:59%;left:21%;top:3%;height:94%;filter:drop-shadow(0 2px 1px #6c4803)}.rf-vault.is-charged .rf-object-body{box-shadow:inset 3px 3px #fffbbc,inset -5px -6px #d78003,0 7px #00558f,0 10px #12bfe6,0 0 25px #ffc70038}.rf-trophy{width:210px;height:220px;margin:auto}.rf-trophy .rf-object-body{inset:18px 45px 74px;border-radius:24px 24px 55px 55px;transform:rotate(-5deg);background:linear-gradient(125deg,#fff5a0,#ffcf08 40%,#ff9200);box-shadow:inset 4px 4px #ffffc6,inset -9px -10px #e67c00,0 7px #0066ab;z-index:2}.rf-trophy .rf-object-body::before,.rf-trophy .rf-object-body::after{content:'';position:absolute;top:20px;width:36px;height:62px;border:9px solid #12bff4;box-shadow:inset 2px 2px #a6f8ff;border-radius:12px 12px 30px 30px;z-index:-1}.rf-trophy .rf-object-body::before{left:-39px}.rf-trophy .rf-object-body::after{right:-39px}.rf-trophy-stem{position:absolute;left:92px;top:138px;width:26px;height:47px;background:linear-gradient(90deg,#0082bd,#60e6ff,#0272ad);z-index:1}.rf-trophy-base{position:absolute;bottom:18px;left:53px;width:104px;height:25px;border-radius:50%;background:linear-gradient(#a6faff,#00aeed);border:3px solid #2fdcff;box-shadow:0 7px #005da0,0 10px #02a1d4}.rf-trophy .rf-glint{top:8px;right:30px;font-size:34px}.rf-trophy .rf-object-shadow{bottom:0}.energy-widgets{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:22px 0 5px}.energy-widget{display:flex;align-items:center;gap:4px;text-align:left;min-width:0;padding:12px 12px 12px 0;border:1px solid #27607c;border-bottom:4px solid #093751;border-radius:22px;background:radial-gradient(ellipse at 5% 10%,#145271,#18303e 65%);transition:border-color .2s,transform .2s}.energy-widget:hover{border-color:#41daf4}.energy-widget:active{transform:translateY(2px)}.widget-copy{display:flex;flex:1;min-width:0;flex-direction:column;gap:6px}.widget-copy .eyebrow{color:#6ee7ff;font-size:9px;letter-spacing:1px}.widget-copy strong{font:500 18px Fredoka,sans-serif;line-height:1.15;color:#fff1b4}.widget-copy>span:not(.eyebrow):not(.widget-meter){font-size:11px;color:#b3cedc;line-height:1.4}.widget-copy small{font-size:10px;color:#a5d8ea}.widget-meter{height:7px;background:#082637;border-radius:10px;overflow:hidden;display:block;margin-top:2px}.widget-meter i{height:100%;display:block;border-radius:10px;background:linear-gradient(90deg,#ff9d0a,#fff170);box-shadow:0 0 8px #ffc800}.widget-earned{border-color:#beaa3e}.checkpoint-detail{text-align:center}.checkpoint-detail>.rf-object{margin:0 auto 18px;transform:scale(1.3)}.checkpoint-detail h2{font:500 28px Fredoka,sans-serif;margin:12px 0}.checkpoint-detail p{font-size:14px;color:var(--muted)}.checkpoint-detail ul{list-style:none;padding:0;text-align:left;margin:22px 0}.checkpoint-detail li{padding:13px;border-bottom:1px solid #315569}.checkpoint-detail li span{color:#ffd323;margin-right:10px}.spark-badge{display:grid;justify-items:center;gap:6px;border:1px solid #e7b933;border-radius:18px;padding:18px;background:radial-gradient(ellipse at top,#45513b,#192b36)}.spark-badge strong{color:#ffe575;font:500 24px Fredoka,sans-serif}.spark-badge>span{font-size:12px;color:#bdcfd9}.landmark-seal{position:absolute;bottom:9px;right:4px;filter:drop-shadow(0 0 6px #00caff55)}.art-float{position:relative}.path-art svg{filter:drop-shadow(1px 3px 0 #00649b)}
.learn-dialog.league-dialog{width:100%;max-width:760px;height:100dvh;max-height:100dvh;margin:0 auto;padding:64px 28px 40px;border:0;border-radius:0;background:#101e29;overflow-y:auto}.league-dialog .dialog-close{position:absolute;top:max(14px,env(safe-area-inset-top));right:20px;z-index:6;background:#153447}.league-heading{text-align:center}.league-heading h2{font:500 38px Fredoka,sans-serif;margin:9px 0;color:#fff3b0}.league-heading p{font-size:12px;color:#92c5d8}.round-clock{display:inline-block;margin:15px 0 0;padding:8px 14px;border:1px solid #31576e;border-radius:30px;font-size:12px;color:#c3dfe8}.league-showcase{text-align:center;background:radial-gradient(ellipse at center,#06456a88,transparent 67%);margin:8px -10px 24px}.league-showcase>p{font:500 17px Fredoka,sans-serif;color:#ffe575}.league-personal{display:flex;align-items:center;gap:12px;padding:16px;border:1px solid #088fc5;border-bottom:4px solid #05567f;border-radius:18px;background:linear-gradient(115deg,#114b65,#172f3e)}.league-personal>span{flex:1}.league-personal strong{display:block;font-size:15px}.league-personal small{display:block;color:#b4d6e2;font-size:11px;margin-top:5px}.league-personal>b{color:#ffe36b;font-size:14px;white-space:nowrap}.league li{padding:17px 10px;gap:12px}.league li>.league-avatar{flex:0 0 46px;width:46px;height:48px;display:grid;place-items:center;border:2px solid #39c3ee;border-radius:17px;background:linear-gradient(135deg,#159acb,#065181);box-shadow:inset 2px 2px #9fefff55,0 4px #06334e;font:500 23px Fredoka,sans-serif;color:#e0faff}.league li>.your-avatar{background:linear-gradient(135deg,#ffea64,#f99908);border-color:#fff18d}.league .rank-number{width:20px;font-size:17px}.league li:nth-child(-n+3) .rank-number{color:#ffe065}.league .you{background:linear-gradient(110deg,#12455b,#19313d);border-color:#1bb7ed}.league .you>strong{color:#ffe36b}.league li small{font-size:11px;margin-top:4px}.league .account-note{line-height:1.7;margin-top:24px}
@keyframes brand-glint{0%,75%,100%{opacity:.65;transform:scale(.85)}85%{opacity:1;transform:scale(1.15)}}@media(max-width:1000px){.energy-widgets{grid-template-columns:1fr}.energy-widget{padding-right:20px}.widget-copy strong{font-size:20px}.energy-widget .rf-object{width:105px}}@media(max-width:700px){.energy-widgets{gap:12px;margin:18px 0 8px}.energy-widget{min-height:130px}.widget-copy>span:not(.eyebrow):not(.widget-meter){font-size:12px}.widget-copy small{font-size:11px}.learn-dialog.league-dialog{padding:65px 18px 30px}.league-heading h2{font-size:34px}.league-personal{padding:12px;gap:8px}.league li{gap:10px}.league li>strong{font-size:12px}.league li>span:not(.league-avatar){font-size:15px}}@media(prefers-reduced-motion:reduce){.rf-object.is-charged .rf-glint{animation:none}.energy-widget{transition:none}}
/* A compact version of the same trophy anchors the leaderboard navigation. */
.nav a>.rf-trophy{width:24px;height:27px;margin:0;overflow:visible}.nav a>.rf-trophy .rf-object-body{inset:2px 5px 9px;border-width:1px;border-radius:3px 3px 8px 8px;box-shadow:inset 1px 1px #fffac0,0 1px #047fbd}.nav a>.rf-trophy .rf-object-body::before,.nav a>.rf-trophy .rf-object-body::after{top:2px;width:5px;height:8px;border-width:2px;border-radius:2px 2px 5px 5px;box-shadow:none}.nav a>.rf-trophy .rf-object-body::before{left:-7px}.nav a>.rf-trophy .rf-object-body::after{right:-7px}.nav a>.rf-trophy .rf-object-shine,.nav a>.rf-trophy .rf-glint{display:none}.nav a>.rf-trophy .rf-bolt{width:90%;height:90%;left:5%;top:5%}.nav a>.rf-trophy .rf-trophy-stem{left:11px;top:17px;width:3px;height:6px}.nav a>.rf-trophy .rf-trophy-base{left:6px;bottom:1px;width:13px;height:4px;border-width:1px;box-shadow:0 1px #006fa7}.nav a>.rf-trophy .rf-object-shadow{bottom:0;height:2px}

/* Distinct energy symbols and foreground celebrations, inspired by the reference pacing. */
.energy-icon{display:inline-block;vertical-align:middle;flex-shrink:0;overflow:visible;filter:drop-shadow(0 3px 0 #005b8a)}.energy-small{width:27px;height:29px}.energy-medium{width:48px;height:52px}.energy-hero{width:190px;height:200px}.pill .energy-icon{margin:-5px 0}.finish>.energy-hero{margin:0 auto 16px;display:block}.finish-streak .energy-icon{width:30px;height:34px!important;margin-right:6px}.answer-celebration{position:fixed;left:50%;top:26%;transform:translate(-50%,-50%);z-index:80;pointer-events:none;display:grid;justify-items:center;white-space:nowrap;color:#fff8ae;text-shadow:0 3px #ce8300,0 6px #06364c;animation:answer-pop 1.25s both}.answer-celebration strong{font:600 clamp(30px,7vw,50px) Fredoka,sans-serif;font-style:italic;letter-spacing:.5px}.answer-celebration>span{font:600 25px Fredoka,sans-serif;color:#ffe84a}.answer-celebration svg{width:70px;height:74px;filter:drop-shadow(0 0 18px #00cfff55)}@keyframes answer-pop{0%{opacity:0;transform:translate(-50%,-50%) scale(.25) rotate(-12deg)}18%{opacity:1;transform:translate(-50%,-50%) scale(1.15) rotate(3deg)}30%,75%{opacity:1;transform:translate(-50%,-50%) scale(1) rotate(-3deg)}100%{opacity:0;transform:translate(-50%,-90%) scale(.85)}}.track-powered .fill{background:linear-gradient(90deg,#ffb000,#fff16b)!important;box-shadow:0 0 14px #ffe04888}.celebration-screen{position:fixed;inset:0;width:100%;height:100dvh;max-width:none;max-height:none;margin:0;border:0;padding:0;background:#101e29;color:#f0faff;overflow:auto}.celebration-screen::backdrop{background:#101e29}.celebration-stage{position:relative;isolation:isolate;max-width:650px;min-height:100%;margin:auto;padding:65px 24px max(30px,env(safe-area-inset-bottom));display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;overflow:hidden}.celebration-skip{position:absolute;right:18px;top:max(18px,env(safe-area-inset-top));background:none;border:0;color:#aec8d6;font-size:12px;min-height:44px;z-index:5}.celebration-art{position:relative;width:230px;height:245px;display:grid;place-items:center;margin-bottom:12px}.celebration-art>.energy-icon{position:relative;z-index:2;animation:hero-arrival .8s cubic-bezier(.2,.8,.3,1.2) both}.streak-stage .energy-shape{transform-origin:50% 85%;animation:flame-alive 2.2s ease-in-out .7s infinite}.celebration-ring{position:absolute;width:180px;height:180px;border:4px solid #16d2ff;border-radius:50%;opacity:0;animation:energy-ring 1.1s ease-out .2s}.celebration-rays{position:absolute;top:5%;left:calc(50% - 240px);width:480px;height:480px;background:repeating-conic-gradient(from 0deg,transparent 0deg 20deg,#09acdb12 20deg 30deg);mask-image:radial-gradient(circle,#000,transparent 70%);z-index:-1;animation:rays-turn 30s linear infinite}.celebration-particle{position:absolute;left:50%;top:50%;width:8px;height:13px;border-radius:3px;background:#ffe348;opacity:0;transform:rotate(var(--angle));animation:energy-particle 1.2s ease-out var(--delay) both}.celebration-particle:nth-child(even){background:#12d7ff}.celebration-stage>.eyebrow{color:#7ee7ff;letter-spacing:3px;animation:celebration-rise .45s .2s both}.celebration-stage h1{font:500 clamp(29px,6vw,43px) Fredoka,sans-serif;margin:12px 0;animation:celebration-rise .5s .3s both}.celebration-count{font:600 66px Fredoka,sans-serif;color:#ffe15d;line-height:1.05;margin:10px 0}.celebration-count>span{display:block;font:700 15px Nunito,sans-serif;color:#e9bc53;margin-top:8px}.celebration-week{display:flex;justify-content:center;gap:12px;margin:22px 0 8px}.celebration-week>div{display:grid;gap:9px;font-size:12px;color:#a9bfca}.celebration-week b{display:grid;place-items:center;width:32px;height:32px;background:#213744;border-radius:50%;font-size:20px}.celebration-week .secured-today b{background:#ffcf18;color:#705206;animation:day-ignite .65s .7s both}.celebration-copy{color:#adc8d6;font-size:14px;max-width:310px;margin:16px 0 24px}.celebration-next{width:min(100%,340px)}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.celebration-stage .energy-star{transform-origin:85px 18px;animation:brand-glint 2s infinite}@keyframes hero-arrival{0%{opacity:0;transform:translateY(85px) scale(.25) rotate(-20deg)}65%{opacity:1;transform:translateY(-12px) scale(1.1) rotate(5deg)}100%{transform:translateY(0) scale(1) rotate(0)}}@keyframes flame-alive{0%,100%{transform:scale(1) rotate(-2deg)}50%{transform:scale(.97,1.06) rotate(2deg)}}@keyframes energy-ring{0%{opacity:.9;transform:scale(.3)}100%{opacity:0;transform:scale(1.7)}}@keyframes energy-particle{0%{opacity:1;transform:rotate(var(--angle)) translateY(-40px) scale(.5)}75%{opacity:1}100%{opacity:0;transform:rotate(var(--angle)) translateY(-165px) scale(0)}}@keyframes rays-turn{to{transform:rotate(360deg)}}@keyframes celebration-rise{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes day-ignite{0%{transform:scale(.5);opacity:.4}70%{transform:scale(1.3)}100%{transform:scale(1);opacity:1}}@media(max-height:760px){.celebration-art{height:175px;margin-bottom:0}.celebration-art .energy-hero{width:145px;height:155px}.celebration-count{font-size:52px}.celebration-stage{padding-top:60px}.celebration-week{margin-top:14px}.celebration-copy{margin:12px 0 18px}}@media(prefers-reduced-motion:reduce){.answer-celebration,.celebration-stage *{animation:none!important;transition:none!important}.celebration-particle,.celebration-ring,.celebration-rays{display:none}.answer-celebration{opacity:1}.celebration-art>.energy-icon{opacity:1}.celebration-week .secured-today b{opacity:1}}
.term-factor,.term-constant{position:relative;display:inline-block}.term-cancelled{color:#ffe16b}.term-cancelled::after{content:'';position:absolute;top:51%;left:-2px;right:-2px;height:3px;background:#fffbd0;box-shadow:0 0 8px #ffd943;transform:rotate(-12deg);transform-origin:left;animation:cancel-term .35s .2s both}@keyframes cancel-term{from{transform:rotate(-12deg) scaleX(0)}to{transform:rotate(-12deg) scaleX(1)}}@media(prefers-reduced-motion:reduce){.term-cancelled::after{animation:none}}

/* Completion reference, 2026-09-28: entrance, staggered results, then ignition. */
.intro-stage{gap:10px}.victory-banner{position:relative;display:grid;place-items:center;width:calc(100% + 100px);height:300px;margin:0 -50px 20px;background:linear-gradient(130deg,#0275b7,#15d9ff 65%,#9af8ff);clip-path:polygon(0 12%,100% 0,100% 86%,0 100%);animation:victory-sweep 650ms cubic-bezier(.15,.7,.2,1) both;isolation:isolate}.victory-banner>.rf-bolt{position:relative;width:225px;height:250px;left:auto;top:auto;filter:drop-shadow(0 10px 0 #006eac55);animation:victory-mark 900ms 100ms cubic-bezier(.2,.9,.25,1.2) both}.victory-speedlines{position:absolute;inset:0;z-index:-1;background:repeating-linear-gradient(-8deg,transparent 0 28px,#e5ffff35 29px 45px,transparent 46px 65px);animation:speedline-drift 1.6s linear both}.intro-stage h1{max-width:330px;color:#ffe563;animation:celebration-rise .4s .35s both}.intro-confetti{position:absolute;top:48%;left:50%}.intro-stage .celebration-next{margin-top:30px}.results-stage .celebration-art>.energy-icon{animation:hero-arrival .7s both,medal-sway 3s .7s ease-in-out infinite}.results-stage .celebration-copy{min-height:44px;margin:8px 0 25px}.earned-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;width:100%;max-width:390px;margin:30px 0 30px}.earned-card{border:2px solid var(--card-color);border-radius:15px;overflow:hidden;animation:card-land .55s cubic-bezier(.2,.9,.25,1.3) both;--card-color:#ffdb43;background:#152a36}.earned-card>span:not(.sr-only){display:block;padding:6px 2px;background:var(--card-color);color:#102632;font-size:10px;font-weight:900;text-transform:uppercase}.earned-card strong{min-height:55px;display:flex;align-items:center;justify-content:center;gap:5px;color:var(--card-color);font:500 21px Fredoka,sans-serif;white-space:nowrap}.earned-card strong b{font:inherit}.earned-card strong i{font-style:normal;font-size:21px}.earned-card .energy-icon{width:22px;height:25px}.earned-xp{animation-delay:.15s}.earned-accuracy{--card-color:#9cdeac;animation-delay:.5s}.earned-time{--card-color:#5ed8f3;animation-delay:.85s}.staged-ignition .celebration-art{margin-bottom:0}.staged-ignition .celebration-art>.energy-icon{animation:flame-ignite 1.6s cubic-bezier(.25,.7,.3,1) both}.staged-ignition .energy-shape{animation:flame-alive 2.2s ease-in-out 1.6s infinite}.staged-ignition .celebration-ring{animation:energy-ring 900ms ease-out 650ms both}.staged-ignition .celebration-particle{animation-delay:calc(var(--delay) + .35s)}.streak-counter{display:grid;place-items:center;font:600 82px Fredoka,sans-serif;line-height:1.15;color:#ffcb23;min-height:100px;position:relative}.streak-counter>span{grid-area:1/1}.streak-before{color:#546871;animation:old-streak .9s .45s both}.streak-after{animation:new-streak .8s .95s both}.streak-unit{color:#ffcd43;font-size:19px;font-weight:800;animation:celebration-rise .35s 1.35s both}.staged-ignition .celebration-week{animation:celebration-rise .4s 1.65s both;margin-top:25px;gap:7px}.celebration-week .day-practiced b{background:#ffd225;color:#5c4100;box-shadow:0 3px #986812}.staged-ignition .celebration-week .secured-today b{animation:day-ignite .6s 1.95s both;box-shadow:0 3px #986812,0 0 15px #ffd90055}.staged-ignition .celebration-copy{animation:celebration-rise .4s 1.9s both}.staged-ignition .celebration-next{margin-top:25px}.staged-ignition .celebration-art .energy-star{animation:brand-glint 2s 1.5s infinite}.staged-ignition .celebration-copy{min-height:44px}
@keyframes victory-sweep{from{transform:translateX(-110%) rotate(-12deg)}70%{transform:translateX(4%) rotate(2deg)}to{transform:translateX(0) rotate(0)}}@keyframes victory-mark{0%{opacity:0;transform:translateX(-100px) rotate(-30deg) scale(.6)}70%{opacity:1;transform:rotate(8deg) scale(1.08)}100%{opacity:1;transform:rotate(0) scale(1)}}@keyframes speedline-drift{to{transform:translateX(50px)}}@keyframes card-land{0%{opacity:0;transform:translateY(30px) scale(.6) rotate(-8deg)}70%{opacity:1;transform:translateY(-6px) scale(1.06) rotate(2deg)}100%{opacity:1;transform:none}}@keyframes medal-sway{0%,100%{transform:rotate(-5deg) translateY(0)}50%{transform:rotate(5deg) translateY(-7px)}}@keyframes flame-ignite{0%,20%{filter:grayscale(1) brightness(.45);transform:scale(.8)}32%{filter:grayscale(0);transform:translateY(15px) scale(1.12,.45) rotate(-12deg)}48%{transform:translateY(-28px) scale(.8,1.3) rotate(8deg)}66%{transform:translateY(18px) scale(1.18,.55) rotate(-4deg)}82%{transform:translateY(-8px) scale(.93,1.13)}100%{filter:grayscale(0);transform:none}}@keyframes old-streak{0%,40%{opacity:1;transform:none}100%{opacity:0;transform:translateY(-35px) scale(.8)}}@keyframes new-streak{0%{opacity:0;transform:translateY(40px) scale(.65)}65%{opacity:1;transform:translateY(-8px) scale(1.15)}100%{opacity:1;transform:none}}
@media(max-height:760px){.victory-banner{height:240px}.victory-banner>.rf-bolt{height:195px;width:185px}.earned-cards{margin:12px 0 22px}.streak-counter{font-size:68px;min-height:78px}.staged-ignition .celebration-next{margin-top:8px}.staged-ignition .celebration-week{margin-top:16px}}@media(max-width:350px){.earned-cards{gap:6px}.earned-card strong{font-size:18px;gap:2px}.earned-card .energy-icon{width:18px}.celebration-week{gap:6px}}@media(prefers-reduced-motion:reduce){.streak-before{display:none}.streak-after{opacity:1}.staged-ignition .celebration-art>.energy-icon{filter:none}.earned-card{opacity:1;transform:none}.victory-banner,.victory-banner>.rf-bolt{animation:none!important}}

/* Milestones build from a small pop to a single cinematic lightning strike. */
.sound-toggle{border:1px solid #385566;border-radius:12px;background:#162d3c;padding:8px;color:#bcefff;font-size:11px;min-height:44px;white-space:nowrap}.lesson-header{position:relative;padding-top:46px}.lesson-header>.sound-toggle{position:absolute;right:0;top:0}.celebration-stage>.sound-toggle{position:absolute;left:18px;top:max(18px,env(safe-area-inset-top));z-index:5}.cue-previews{display:grid;gap:12px;margin:20px 0}.milestone-overlay{position:fixed;inset:0;z-index:80;pointer-events:none;overflow:hidden}.milestone-overlay .answer-celebration{z-index:2}.milestone-aura{position:absolute;inset:0;opacity:0;background:radial-gradient(ellipse at 50% 26%,#08bded44,transparent 65%)}.milestone-5 .milestone-aura{animation:milestone-glow 1.8s both}.milestone-7 .milestone-aura{background:radial-gradient(ellipse at 50% 26%,#fff29c66,#009bda38 35%,transparent 80%);animation:milestone-glow 2.3s both}.milestone-5 .answer-celebration{animation-duration:1.8s}.milestone-7 .answer-celebration{animation-duration:2.3s;animation-delay:.12s}.milestone-5 .answer-celebration svg,.milestone-7 .answer-celebration svg{width:95px;height:100px}.milestone-orbit{position:absolute;top:-35px;width:230px;height:230px;border:3px solid #5eeaff;border-radius:50%;z-index:-1;animation:milestone-ring 1s .12s both}.milestone-7 .milestone-orbit{border-color:#ffe357;width:280px;height:280px;top:-55px}.screen-lightning{position:absolute;inset:0;width:100%;height:100%;filter:drop-shadow(0 0 12px #00cfff);opacity:0;animation:lightning-strike 1.05s ease-out both}.screen-lightning path{fill:none;stroke:#d9fcff;stroke-width:7;stroke-linejoin:bevel;stroke-dasharray:1100;stroke-dashoffset:1100;animation:lightning-draw .25s ease-out forwards}.screen-lightning path+path{stroke:#ffe77a;stroke-width:5}.milestone-7 .answer-celebration strong{color:#fffbc8}.answer-celebration>span{font-size:18px;margin-top:5px}
@keyframes lightning-draw{to{stroke-dashoffset:0}}@keyframes lightning-strike{0%{opacity:0}18%,35%{opacity:1}100%{opacity:0}}@keyframes milestone-glow{0%{opacity:0}20%,45%{opacity:1}100%{opacity:0}}@keyframes milestone-ring{from{opacity:1;transform:scale(.25) rotate(-30deg)}to{opacity:0;transform:scale(1.5) rotate(40deg)}}
/* Daily streak: charge → launch → ignition impact → number lands → calendar lights. */
.streak-halo{position:absolute;top:12%;width:650px;height:650px;z-index:-1;background:radial-gradient(ellipse,#ffb30025,transparent 65%);animation:streak-atmosphere 2.5s both}.flame-halo{position:absolute;width:190px;height:190px;border-radius:50%;background:radial-gradient(ellipse,#ffca3866,transparent 70%);animation:flame-aura 3s 1s ease-in-out infinite}.staged-ignition .celebration-art>.energy-icon{animation:flame-launch 1.75s cubic-bezier(.2,.65,.3,1) both}.staged-ignition .energy-shape{animation:flame-dance 1.8s ease-in-out 1.75s infinite;transform-box:fill-box;transform-origin:50% 90%}.staged-ignition .celebration-ring{animation:energy-ring 1s ease-out 1s both;border-color:#ffdf55}.staged-ignition .celebration-particle{animation-delay:calc(var(--delay) + .75s)}.streak-counter{perspective:600px;text-shadow:0 4px #a45d06,0 0 28px #ffbf0030}.streak-before{animation:streak-roll-out .5s .8s both}.streak-after{animation:streak-slam .85s 1.03s both}.streak-unit{animation-delay:1.65s}.staged-ignition .celebration-week{animation-delay:1.9s}.staged-ignition .celebration-week .secured-today b{animation:day-ignite .65s 2.15s both}.staged-ignition .celebration-copy{animation-delay:2.1s}
@keyframes flame-launch{0%,15%{filter:grayscale(1) brightness(.5);transform:translateY(16px) scale(.78)}30%{filter:grayscale(.6);transform:translateY(30px) scale(1.15,.6) rotate(-8deg)}48%{filter:drop-shadow(0 0 6px #ffd500);transform:translateY(-55px) scale(.75,1.3) rotate(7deg)}60%{transform:translateY(10px) scale(1.22,.78);filter:drop-shadow(0 0 32px #ffb600)}74%{transform:translateY(-14px) scale(.94,1.13) rotate(-3deg)}88%{transform:translateY(3px) scale(1.04,.96)}100%{transform:none;filter:drop-shadow(0 0 16px #ffb00066)}}@keyframes flame-dance{0%,100%{transform:scale(1) rotate(-2deg)}33%{transform:scale(.96,1.06) rotate(3deg)}68%{transform:scale(1.03,.98) rotate(-1deg)}}@keyframes streak-roll-out{to{opacity:0;transform:translateY(-55px) rotateX(70deg) scale(.7)}}@keyframes streak-slam{0%{opacity:0;transform:translateY(60px) rotateX(-65deg) scale(.5)}40%{opacity:1;transform:translateY(-12px) rotateX(0) scale(1.3)}62%{transform:translateY(7px) scale(1.1,.8)}80%{transform:translateY(-4px) scale(.98,1.08)}100%{opacity:1;transform:none}}@keyframes flame-aura{0%,100%{transform:scale(.85);opacity:.5}50%{transform:scale(1.25);opacity:1}}@keyframes streak-atmosphere{from{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}
@media(prefers-reduced-motion:reduce){.milestone-overlay *{animation:none!important}.screen-lightning,.milestone-orbit,.milestone-aura,.streak-halo,.flame-halo{display:none}.staged-ignition .celebration-art>.energy-icon{filter:none}.streak-before{display:none}.streak-after{opacity:1;transform:none}}
.milestone-overlay .answer-celebration{filter:drop-shadow(0 4px 10px #071722);text-shadow:0 2px #835500,0 4px #072231}.milestone-overlay .answer-celebration::before{content:'';position:absolute;inset:-15px -25px;z-index:-2;border-radius:50%;background:radial-gradient(ellipse,#102330ee,transparent 72%)}

/* First visit: a quiet frame around bright, expressive brand artwork. */
.onboarding{min-height:100dvh;max-width:1050px;margin:auto;padding:24px 28px max(22px,env(safe-area-inset-bottom));display:flex;flex-direction:column;isolation:isolate}.onboarding-header{display:flex;align-items:center;justify-content:space-between;gap:15px}.onboarding-brand{display:flex;align-items:center;gap:10px;font:500 19px Fredoka,sans-serif}.onboarding-brand .rf-bolt{width:33px;height:38px}.onboarding-skip,.onboarding-back,.onboarding-explore{border:0;background:none;color:#b0c6d5;min-height:44px;padding:10px;font-size:13px;font-weight:750}.onboarding-progress{display:flex;gap:7px;max-width:230px;width:100%;margin:30px auto 0}.onboarding-progress>span{height:5px;background:#273e4d;border-radius:10px;flex:1}.onboarding-progress>.is-filled{background:#5ed8f3;box-shadow:0 0 10px #5ed8f333}.onboarding-content{width:100%;max-width:510px;margin:auto;display:flex;flex-direction:column;align-items:center;text-align:center;padding:30px 0 20px;animation:onboarding-arrive .4s ease-out both}.onboarding-content h1{font:550 clamp(32px,6vw,48px)/1.06 Fredoka,sans-serif;letter-spacing:-1px;margin:15px 0;color:#f3faff;max-width:450px}.onboarding-content .eyebrow{color:#68d9ef;font-size:10px;letter-spacing:2px}.onboarding-description{color:#b2c9d7;font-size:16px;line-height:1.6;max-width:390px;margin:4px auto 20px}.welcome-art{position:relative;width:300px;height:275px;display:grid;place-items:center;margin:0 auto 20px;background:radial-gradient(ellipse,#078cba35,transparent 68%)}.welcome-art>.rf-bolt{position:relative;inset:auto;width:180px;height:205px;object-fit:contain;filter:drop-shadow(0 10px 22px #0098d750);animation:welcome-charge 1s cubic-bezier(.2,.8,.2,1) both,welcome-hover 4s 1s ease-in-out infinite}.welcome-orbit{position:absolute;width:245px;height:245px;border:1px solid #2f799855;border-radius:50%;box-shadow:0 0 0 24px #14647b0b;transform:rotate(-20deg) scaleY(.7)}.orbit-tilt{transform:rotate(60deg) scaleY(.7)}.welcome-equation{position:absolute;padding:9px 13px;border:1px solid #3b7a94;border-bottom:4px solid #184d67;border-radius:13px;color:#cff9ff;background:#163b50;font:500 21px Fredoka,sans-serif;animation:welcome-hover 4s ease-in-out infinite}.eq-left{left:0;top:52px;rotate:-12deg}.eq-right{right:0;bottom:35px;rotate:9deg;animation-delay:-2s}.welcome-spark{position:absolute;right:28px;top:25px;color:#ffdf67;font-size:34px;animation:brand-glint 3s infinite}.welcome-benefits{display:flex;flex-wrap:wrap;justify-content:center;gap:9px 18px;color:#d3e8ed;font-size:12px;font-weight:750;max-width:370px;margin-top:6px}.welcome-benefits span:first-letter{color:#ffdf67}.onboarding-footer{display:grid;justify-items:center;gap:6px;width:100%;max-width:400px;margin:15px auto 0}.onboarding-next{width:100%;font-size:16px}.onboarding-symbol{padding:15px;border:1px solid #316077;border-radius:24px;background:radial-gradient(ellipse,#174b63,#122836)}.onboarding-symbol .energy-icon{width:56px;height:60px}.onboarding-options{display:grid;gap:12px;width:100%;margin:7px 0}.onboarding-option{width:100%;display:flex;align-items:center;gap:15px;text-align:left;padding:17px;border:2px solid #2c4658;border-bottom-width:5px;border-radius:18px;background:#172a38;min-height:90px}.onboarding-option.is-selected{border-color:#54d7ef;background:#163f50;box-shadow:0 0 22px #32c4ed0a}.onboarding-option>span:nth-child(2){flex:1}.onboarding-option strong{display:block;font:500 19px Fredoka,sans-serif;color:#edf9ff}.onboarding-option small{display:block;font-size:12px;color:#adc8d5;margin-top:5px;line-height:1.5}.option-mark,.option-minutes{flex:0 0 50px;text-align:center;font:500 27px Fredoka,sans-serif;color:#ffe074}.option-minutes small{font:700 10px Nunito,sans-serif;color:#ffe074}.option-check{color:#6cdfef;font-size:23px}.onboarding-note{font-size:12px;line-height:1.5;color:#91aebf;max-width:360px;margin:15px auto 0}.onboarding-plan{border:1px solid #42667a;border-bottom:4px solid #274452;border-radius:22px;background:linear-gradient(130deg,#1c3c4c,#172b38);padding:24px;margin-top:12px}.onboarding-plan>span{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:#65d9ed}.onboarding-plan strong{display:block;color:#ffdf75;font:500 24px Fredoka,sans-serif;margin:12px 0}.onboarding-plan p{font-size:14px;color:#c5dce6}.welcome-ready{height:190px;margin-bottom:15px}.welcome-ready>.rf-bolt{width:140px;height:175px}.welcome-ready .welcome-orbit{width:185px;height:185px}.learning-plan-link{display:block;margin:12px 0 4px;padding:8px 0;background:none;border:0;color:#aad3e2;font-size:12px;text-align:left;min-height:44px}
@keyframes onboarding-arrive{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@keyframes welcome-charge{from{opacity:0;transform:translateY(35px) scale(.5) rotate(-18deg)}75%{opacity:1;transform:translateY(-8px) scale(1.08) rotate(4deg)}to{opacity:1;transform:none}}@keyframes welcome-hover{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-10px) rotate(3deg)}}
@media(max-width:600px){.onboarding{padding:18px 22px max(18px,env(safe-area-inset-bottom));padding-top:max(18px,env(safe-area-inset-top))}.onboarding-brand{font-size:16px;gap:6px}.onboarding-skip{font-size:11px;padding:6px}.onboarding-progress{margin-top:22px;max-width:170px}.onboarding-content{padding-top:24px}.onboarding-content h1{font-size:36px}.onboarding-description{font-size:15px}.onboarding-option{padding:14px 12px;gap:10px}.onboarding-option strong{font-size:18px}}@media(max-height:740px){.welcome-art{height:205px;width:270px;margin-bottom:12px}.welcome-art>.rf-bolt{height:170px;width:155px}.welcome-orbit{height:190px;width:210px}.welcome-ready{height:140px}.welcome-ready>.rf-bolt{height:140px}.onboarding-content{padding-top:18px}.onboarding-content h1{font-size:32px}.onboarding-description{margin-bottom:12px}.onboarding-symbol{padding:8px}.onboarding-symbol .energy-icon{width:40px;height:44px}}@media(prefers-reduced-motion:reduce){.onboarding *{animation:none!important;transition:none!important}}
.onboarding-content h1:focus{outline:none}

/* Electric-blue streak identity, with continuously travelling internal currents. */
.balance-icon{width:29px;height:29px;vertical-align:middle;margin-right:6px;filter:drop-shadow(0 2px 0 #063f66)}.feedback:empty{display:none}.energy-flame{filter:drop-shadow(0 3px 0 #064c92)}.flame-arc{fill:none;stroke:#edffff;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:18 55;animation:flame-current-flow 2s linear infinite;filter:drop-shadow(0 0 2px #d1ffff)}.arc-two{stroke:#b8faff;stroke-width:2;animation-duration:2.7s;animation-delay:-1s}.arc-three{stroke-width:1.5;animation-duration:2.3s;animation-delay:-.5s}.streak-halo{background:radial-gradient(ellipse,#00baff30,transparent 65%)}.flame-halo{background:radial-gradient(ellipse,#19d9ff66,transparent 70%)}.staged-ignition .celebration-ring{border-color:#89f6ff}.staged-ignition .celebration-art>.energy-flame{animation:electric-flame-arrival 1.8s cubic-bezier(.2,.65,.3,1) both}.staged-ignition .energy-shape{animation:electric-flame-breathe 2.4s ease-in-out 1.8s infinite;transform-box:fill-box;transform-origin:50% 90%}.staged-ignition .celebration-art .celebration-particle{background:#8ffaff}.staged-ignition .celebration-art .celebration-particle:nth-child(even){background:#1597ff}.staged-ignition .streak-counter{color:#8defff;text-shadow:0 4px #0874ad,0 0 28px #00cfff44}.staged-ignition .streak-unit{color:#79e6ff}.staged-ignition .celebration-week .day-practiced b{background:#62def8;color:#073c65;box-shadow:0 3px #0874ad}.staged-ignition .celebration-week .secured-today b{box-shadow:0 3px #0874ad,0 0 18px #1dccff55}
@keyframes flame-current-flow{from{stroke-dashoffset:73}to{stroke-dashoffset:0}}@keyframes electric-flame-breathe{0%,100%{transform:scale(1) rotate(-2deg)}35%{transform:scale(.94,1.09) rotate(3deg)}70%{transform:scale(1.04,.98) rotate(-2deg)}}@keyframes electric-flame-arrival{0%{opacity:0;filter:drop-shadow(0 0 0 #00cfff);transform:translateY(55px) scale(.2,.4) rotate(-18deg)}22%{opacity:1;transform:translateY(20px) scale(1.15,.65) rotate(-8deg)}42%{transform:translateY(-48px) scale(.78,1.28) rotate(6deg);filter:drop-shadow(0 0 16px #00cfff)}60%{transform:translateY(12px) scale(1.18,.82);filter:drop-shadow(0 0 30px #48e5ff)}76%{transform:translateY(-12px) scale(.94,1.1) rotate(-3deg)}90%{transform:translateY(3px) scale(1.03,.98)}100%{opacity:1;transform:none;filter:drop-shadow(0 0 14px #00bdff77)}}
@media(prefers-reduced-motion:reduce){.flame-arc{animation:none!important;stroke-dasharray:none}.staged-ignition .celebration-art>.energy-flame{animation:none!important;filter:drop-shadow(0 0 8px #00bdff44)}}

/* Keep the requested expression visible; only its missing value is editable. */
.equation-answer{display:flex;align-items:center;justify-content:center;gap:16px;width:100%;padding:14px 18px;border:2px solid #2b4658;border-radius:20px;background:#162733}.answer-prefix{font:500 clamp(25px,6vw,34px) Fredoka,sans-serif;color:#effaff;white-space:nowrap;flex:0 1 auto}.equation-answer .answer{width:140px;min-width:0;flex:0 1 160px;margin:0;padding:14px 10px;font-size:30px;border:2px solid #4aa8c1;border-bottom-width:5px;background:#0d1f2c;border-radius:14px;color:#fff}.equation-answer .answer::placeholder{color:#87acbd}.equation-answer .answer:focus{outline:3px solid #5ed8f3;outline-offset:3px}@media(max-width:350px){.equation-answer{gap:12px;padding:12px}.equation-answer .answer{flex-basis:130px}}
.homework-home{max-width:850px;margin:auto;padding:28px 20px}.homework-hero{position:relative;padding:30px;border:1px solid #267ba0;background:radial-gradient(ellipse at top right,#09638a80,transparent 75%),#152c3c;border-radius:24px;margin:22px 0}.homework-hero>.energy-hero{width:90px;height:100px;display:block;margin-bottom:18px;filter:drop-shadow(0 0 16px #16cfff66)}.homework-hero h1{font:500 clamp(28px,6vw,42px) Fredoka,sans-serif;margin:14px 0}.homework-hero p,.homework-note p{line-height:1.7;color:#b2cedd}.homework-note{padding:22px;background:#1b3040;border-radius:18px;margin-bottom:20px;overflow-wrap:anywhere}.homework-list{display:grid;gap:16px}.homework-list article{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:23px;border:1px solid #36546a;border-radius:20px;background:#152735}.homework-list h2{font:500 23px Fredoka,sans-serif;margin:10px 0}.homework-list p{color:#a7c7da;font-size:13px}.homework-list .primary{width:auto;min-width:140px}.homework-home>.notice{margin:22px 0;line-height:1.8}@media(max-width:540px){.homework-list article{align-items:stretch;flex-direction:column}.homework-hero{padding:24px}.homework-hero>.energy-hero{width:65px;height:80px}}

.welcome-world{display:block;width:min(100%,480px);height:auto;margin:12px auto 24px}

.welcome-world{width:min(100%,280px);max-height:240px;object-fit:cover;border-radius:24px}