:root{--ink:#29304d;--muted:#69718e;--surface:#fff;--bg:#fbfcff;--line:#e9eaf3;--purple:#7666d7;--deep:#6756ce;--shadow:0 18px 48px rgba(61,66,118,.08);font-family:"Pretendard","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;color:var(--ink);color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);min-height:100vh;font-size:16px;line-height:1.6}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.52}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #504cb1;outline-offset:3px}h1,h2,h3,p{margin-top:0}.container{width:min(1180px,calc(100% - 48px));margin-inline:auto}.skip-link{position:fixed;z-index:100;top:-80px;left:12px;background:#fff;padding:10px 20px}.skip-link:focus{top:12px}.site-header{height:83px;background:#fff;border-bottom:1px solid #f0eff7;position:sticky;top:0;z-index:30}.nav-wrap{height:100%;max-width:1350px;margin:auto;padding:0 32px;display:flex;align-items:center;gap:42px}.brand{display:inline-flex;align-items:center;gap:10px;flex:none;font-weight:800;font-size:19px;letter-spacing:-.6px;line-height:1.1}.brand strong{color:var(--purple)}.brand small{display:block;font-size:9px;letter-spacing:2.7px;color:#aaa9c5;margin-top:5px}.brand-mark{width:40px;height:40px;display:grid;place-items:center;border-radius:13px;background:#8e80e9;color:white;font-size:24px;box-shadow:0 5px 15px #9388e75c}.site-nav{display:flex;align-items:center;gap:27px;flex:1;font-weight:700;font-size:14px}.site-nav>a,.site-nav summary{color:#5c617c;white-space:nowrap}.site-nav>a:hover,.site-nav summary:hover{color:var(--deep)}.nav-actions{display:flex;align-items:center;gap:16px;font-size:13px;flex:none}.guest-chip,.user-chip{padding:7px 12px;border-radius:30px;background:#f6f5fd;color:#655b9c;font-weight:700}.nav-login{padding:9px 18px;background:var(--purple);color:#fff;border-radius:11px;font-weight:800}.nav-actions form{margin:0}.text-button{border:0;background:none;color:#676b88;font-size:13px}.nav-details{position:relative}.nav-details summary{cursor:pointer;list-style:none}.nav-details summary::-webkit-details-marker{display:none}.nav-dropdown{position:absolute;top:32px;left:-12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;width:210px;box-shadow:var(--shadow);display:grid;gap:2px}.nav-dropdown a{padding:8px;border-radius:8px;font-size:13px}.nav-dropdown a:hover{background:#f3f1fc}.mobile-toggle{display:none}.hero{position:relative;overflow:hidden;background:linear-gradient(111deg,#f9f6ff 8%,#f5f9ff 51%,#effaf9);border-bottom:1px solid #f1f2fb}.hero-inner{min-height:506px;display:grid;grid-template-columns:1.08fr 1fr;align-items:center;gap:20px}.hero-copy{position:relative;z-index:1;padding:55px 0}.eyebrow,.section-kicker{font-size:12px;font-weight:900;letter-spacing:2px;color:#8a78da}.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:9px 14px;border:1px solid #e9e0ff;border-radius:30px;background:#fff}.eyebrow-dot{width:8px;height:8px;border-radius:50%;background:#a69cef}.hero h1{font-size:clamp(36px,4.3vw,56px);line-height:1.27;letter-spacing:-2.3px;margin:19px 0 19px;font-weight:900}.hero h1 em{font-style:normal;color:var(--purple)}.hero-intro{max-width:520px;color:#777e98;font-size:16px;line-height:1.95;word-break:keep-all}.hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:27px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:13px;padding:10px 19px;font-weight:800;border:1px solid transparent;transition:transform .2s,box-shadow .2s;white-space:nowrap}.button:hover{transform:translateY(-2px)}.button-lg{min-height:51px;padding:13px 22px;font-size:14px}.button-primary{background:#7767d7;color:#fff;box-shadow:0 9px 20px #796ed83d}.button-secondary{background:#eae6fe;color:#6157aa}.button-white{background:#fff;color:#6b6199;border-color:#e9e4f5}.hero-footnote{color:#8b92a9;font-size:12px;margin:19px 0 0}.hero-stars span{position:absolute;color:#bbade8;font-size:35px;opacity:.5}.hero-stars span:nth-child(1){left:4%;top:10%}.hero-stars span:nth-child(2){left:44%;top:10%}.hero-stars span:nth-child(3){right:3%;top:40%}.hero-stars span:nth-child(4){left:28%;bottom:7%}.hero-art{position:relative;height:420px;isolation:isolate}.art-orbit{position:absolute;inset:35px 5px;border:2px dashed #c6c9ed;border-radius:50%;opacity:.6;transform:rotate(-15deg)}.orbit-b{inset:72px 50px;transform:rotate(28deg);border-color:#a9d8d3}.art-platform{position:absolute;bottom:42px;left:8%;width:90%;height:100px;background:radial-gradient(ellipse at 50% 30%,#c7d6f5,#9dafe7);border-radius:50%;box-shadow:0 20px 45px #9fa7d645}.mascot{position:absolute;width:135px;height:159px;bottom:110px;border-radius:48% 48% 42% 42%;display:grid;place-items:center;filter:drop-shadow(0 15px 11px rgba(73,70,120,.15));animation:bob 4s ease-in-out infinite}.mascot .face{font-size:25px;font-weight:900;color:#6f6179;white-space:nowrap}.mascot-name{position:absolute;bottom:-35px;background:#fff;border-radius:20px;padding:2px 13px;color:#666089;font-weight:900;font-size:12px}.bunny{background:linear-gradient(#fff,#f4eefa);left:5%;bottom:130px;transform:rotate(-8deg)}.bunny-ears{position:absolute;top:-78px;font-size:73px;color:#f9f6ff;letter-spacing:-30px;white-space:nowrap;text-shadow:2px 2px 1px #dbcbed}.fox{background:linear-gradient(#f8c392,#ec8d75);left:39%;bottom:138px;z-index:1;width:145px;height:168px}.fox-ears{position:absolute;top:-48px;font-size:60px;color:#ee9f7e;letter-spacing:2px}.fox .face{color:#6b4941}.dino{background:linear-gradient(#b3e8c8,#72c9bb);left:70%;bottom:129px;animation-delay:.8s}.dino-spikes{position:absolute;top:-33px;color:#72c9bb;font-size:35px}.art-float{position:absolute;z-index:3;background:#fff;border-radius:17px;box-shadow:0 10px 25px #6d66ad21;padding:10px 16px;font-weight:900;color:#7766d2}.art-num{left:20%;top:37px;transform:rotate(-11deg)}.art-star{right:18%;top:20px;font-size:28px}.art-cube{right:2%;top:137px;font-size:27px}.art-spark{position:absolute;right:25%;bottom:67px;color:#ffc45c;font-size:35px}.art-cloud{position:absolute;width:80px;height:30px;border-radius:40px;background:#fff;opacity:.7;top:100px}.cloud-one{left:2%}.cloud-two{right:5%;top:95px}.feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px;margin-bottom:84px}.feature{display:flex;align-items:center;gap:15px;padding:18px 14px}.feature-icon{width:60px;height:60px;display:grid;place-items:center;border-radius:19px;font-size:28px}.feature-icon.peach{background:#fff0e8}.feature-icon.lavender{background:#eeebff}.feature-icon.mint{background:#e5f7ef}.feature strong,.feature small{display:block}.feature strong{font-size:15px}.feature small{color:#8a91a9;font-size:12px;margin-top:3px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:31px}.section-heading h2{font-size:32px;letter-spacing:-1.2px;line-height:1.35;margin:0 0 10px}.section-heading h2 span{color:var(--purple)}.section-heading p:not(.section-kicker){color:#868ca5;font-size:14px;margin:0}.section-kicker{margin:0 0 9px}.section-decor{font-size:51px}.worlds-section{scroll-margin-top:105px;margin-bottom:98px}.world-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.world-card{background:#fff;border-radius:23px;border:1px solid #f0edf7;overflow:hidden;box-shadow:0 9px 35px #6c6b9620;transition:transform .2s,box-shadow .2s}.world-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px #6c6b962b}.world-card-head{padding:20px 21px 0;display:flex;justify-content:space-between;align-items:center;background:color-mix(in srgb,var(--world-color) 13%,white)}.grade-pill{border-radius:30px;background:#fff;padding:5px 12px;font-weight:900;font-size:12px;color:var(--world-color)}.card-arrow{font-size:21px;color:var(--world-color)}.world-illustration{height:153px;display:grid;place-items:center;background:color-mix(in srgb,var(--world-color) 13%,white);position:relative}.world-emoji{font-size:96px;filter:drop-shadow(0 13px 9px #897c9a29);transition:transform .2s}.world-card:hover .world-emoji{transform:scale(1.08) rotate(-3deg)}.world-sun{position:absolute;top:7px;left:20%;font-size:28px;color:#fff}.world-dot{position:absolute;right:17%;bottom:19px;color:color-mix(in srgb,var(--world-color) 55%,white);font-size:18px}.world-card-content{padding:19px 22px 20px}.world-card h3{font-size:21px;margin:0 0 4px}.world-card p{font-size:13px;color:#8b90a7;margin:0 0 21px}.world-meta{border-top:1px solid #f0eff4;padding-top:13px;display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px}.world-meta>span{color:#969bb0}.world-meta>strong{color:var(--world-color)}.how-it-works{padding:72px 0 86px;background:linear-gradient(120deg,#f7f5ff,#f6fbff)}.centered{text-align:center;display:block}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.step-card{position:relative;background:#fff;text-align:center;padding:31px 27px;border:1px solid #eeeefa;border-radius:24px}.step-number{position:absolute;top:18px;left:22px;font-size:12px;letter-spacing:1px;color:#a0a0be;font-weight:900}.step-art{font-size:62px;padding:8px}.step-card h3{font-size:18px;margin:10px 0 4px}.step-card p{font-size:13px;color:#9095ab;margin:0}.site-footer{border-top:1px solid #ececf6;padding:26px max(24px,calc((100% - 1180px)/2));display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#9498ae}.site-footer>span:first-child{font-weight:900;color:#8c80ce}.content-page{padding-top:38px;padding-bottom:100px;min-height:72vh}.breadcrumb{font-size:13px;color:#8172d4;font-weight:800;display:inline-block;margin-bottom:20px}.page-top{margin:16px 0 28px}.page-top h1{font-size:34px;margin-bottom:8px}.page-top>p:last-child,.muted{color:#858ba4}.world-detail-hero{background:linear-gradient(120deg,color-mix(in srgb,var(--world-color) 17%,white),#fff);border:1px solid color-mix(in srgb,var(--world-color) 20%,white);border-radius:25px;min-height:250px;padding:43px 50px;display:flex;justify-content:space-between;align-items:center;gap:20px}.world-detail-pill{border-radius:30px;padding:7px 14px;background:#fff;color:var(--world-color);font-size:12px;font-weight:900}.world-detail-hero h1{font-size:40px;margin:16px 0 5px}.world-detail-hero h1 span{color:var(--world-color)}.world-detail-hero p{font-size:14px;color:#6f7792;margin:5px 0}.world-detail-hero .world-lead{font-size:17px;font-weight:800;color:#484e72}.world-detail-emoji{font-size:110px;flex:none;filter:drop-shadow(0 12px 7px #8885b32b)}.world-subheading{display:flex;justify-content:space-between;align-items:end;margin:41px 0 19px}.world-subheading h2{font-size:25px;margin:0}.world-subheading>p{color:#989db0;font-size:12px}.unit-list{display:grid;gap:18px}.unit-panel,.surface-panel{background:#fff;border:1px solid #eaeaf3;border-radius:20px;padding:28px;box-shadow:0 8px 27px #6c6b960d}.unit-header{display:flex;align-items:center;gap:16px;margin-bottom:18px}.unit-icon,.stage-icon{display:grid;place-items:center;flex:none;border-radius:16px;background:#f6f3ff;width:55px;height:55px;font-size:28px}.unit-domain{font-size:11px;font-weight:800;color:#8b7cde}.unit-header h3{font-size:19px;margin:0}.unit-header p{font-size:12px;color:#969bb2;margin:1px 0}.stage-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.stage-card{display:flex;align-items:center;gap:12px;padding:17px;border:1px solid #eeedf6;border-radius:16px;transition:border-color .2s,transform .2s}.stage-card:hover{border-color:#c4b8f4;transform:translateY(-2px)}.stage-card .stage-icon{width:44px;height:44px;font-size:23px;background:#f7f7ff}.stage-card>div{flex:1;min-width:0}.stage-card strong,.stage-card small{display:block}.stage-card strong{font-size:14px}.stage-card small{color:#939bb1;font-size:11px;line-height:1.5}.stage-state{flex:none;font-size:11px;font-weight:900;color:#8a7add}.empty-panel{text-align:center;padding:60px 30px;grid-column:1/-1;border:1px dashed #d1cef1;background:#fff;border-radius:24px}.empty-panel span{font-size:54px}.empty-panel p,.empty-text{color:#9199ac}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:24px}.stat-card{padding:25px;border-radius:19px;background:#fff;border:1px solid #eeecf7;display:grid;gap:3px}.stat-card span{font-size:27px}.stat-card strong{font-size:35px;color:#7568ca}.stat-card small{color:#999eb2}.panel-heading{display:flex;align-items:center;justify-content:space-between}.panel-heading h2,.surface-panel h2{font-size:20px}.small-link{font-size:12px;color:#7969d3;font-weight:800}.recent-row{display:flex;align-items:center;gap:15px;padding:13px 0;border-bottom:1px solid #f1f0f5}.recent-row:last-child{border:0}.recent-emoji{font-size:28px}.recent-row>div{flex:1}.recent-row strong,.recent-row small{display:block}.recent-row small{font-size:12px;color:#999eb2}.recent-stars{font-size:13px;font-weight:900;color:#b79a47}.table-scroll{overflow-x:auto}.report-table{border-collapse:collapse;width:100%;min-width:730px;font-size:13px}.report-table th,.report-table td{padding:14px 10px;border-bottom:1px solid #f0eff7;text-align:left}.report-table th{background:#f8f7ff;color:#676a8b}.report-table a{color:#7667c9;font-weight:800}.auth-page{min-height:calc(100vh - 177px);display:grid;place-items:center;padding:35px 0}.login-card{width:min(100%,450px);text-align:center;background:white;border-radius:26px;border:1px solid #eeebf8;padding:34px 42px;box-shadow:var(--shadow)}.login-mascot{font-size:70px}.login-card h1{font-size:26px;margin:4px 0}.login-card .muted{font-size:13px}.form-stack{display:grid;gap:9px;text-align:left;margin:25px 0 18px}.form-stack label{font-size:13px;font-weight:900}.form-stack input{width:100%;border:1px solid #e3e2f1;border-radius:11px;padding:12px 14px;margin-bottom:9px;background:#fff}.form-stack .button{margin-top:5px}.full-width{width:100%}.form-alert{padding:10px;border-radius:10px;background:#fff0ec;color:#a94a37;font-size:13px}.login-note{font-size:11px;color:#aaaabc;line-height:1.8}.gate-card .button{margin:23px 0 19px}
.play-mode{height:100dvh;overflow:hidden}.play-mode .site-header,.play-mode .site-footer{display:none}.play-mode main{height:100dvh;overflow:hidden}.play-screen{height:100dvh;display:flex;flex-direction:column;overflow:hidden;background:radial-gradient(circle at 15% 22%,#f1edff,transparent 25%),radial-gradient(circle at 89% 73%,#e6f9f5,transparent 27%),#f9faff}.play-topbar{height:74px;flex:none;padding:12px clamp(18px,4vw,70px);display:flex;align-items:center;gap:20px;background:#fff;border-bottom:1px solid #eeeef7}.play-exit{white-space:nowrap;border:1px solid #eae8f3;border-radius:12px;padding:8px 13px;color:#77738e;font-weight:800;font-size:12px}.play-progress{width:min(370px,45%);margin-inline:auto;text-align:center}.play-progress>span{display:block;font-size:12px;font-weight:900;color:#6b6a92;margin-bottom:7px}.progress-track{height:8px;border-radius:20px;background:#efecfd;overflow:hidden}.progress-track span{display:block;height:100%;border-radius:20px;background:linear-gradient(90deg,#8b77e8,#e7a2d2)}.play-sound{border:none;background:#f6f5fd;padding:8px 12px;border-radius:10px;color:#8e89ad;font-size:12px}.play-content{flex:1;min-height:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:13px 20px 15px}.play-story{width:min(760px,100%);display:flex;align-items:center;gap:13px;flex:none}.story-mascot{font-size:45px}.story-bubble{background:#fff;border:1px solid #efeefa;border-radius:17px;padding:11px 18px;box-shadow:0 7px 20px #8384a40f;flex:1}.story-bubble span{color:#a18add;font-size:10px;font-weight:900}.story-bubble p{margin:0;font-size:13px;font-weight:700}.play-card{width:min(760px,100%);min-height:0;background:#fff;border:1px solid #eaeaf5;border-radius:24px;padding:clamp(15px,2vw,26px) clamp(18px,3vw,34px);text-align:center;box-shadow:0 14px 45px #7776a018;display:flex;flex-direction:column;justify-content:center;align-items:center}.play-badge{font-size:11px;font-weight:900;color:#7c6ac7;background:#f1eeff;border-radius:30px;padding:5px 12px;margin-bottom:6px}.play-card h1{font-size:clamp(20px,2.6vw,28px);letter-spacing:-.7px;margin:2px 0}.play-question{font-size:clamp(13px,1.6vw,17px);font-weight:700;color:#5a5d7b;margin:0 0 8px}.play-illustration{font-size:clamp(46px,8vh,77px);margin:5px 0 16px}.visual-count{display:flex;justify-content:center;align-items:center;gap:8px;font-size:clamp(30px,6vh,58px);margin:5px 0 18px;flex-wrap:wrap}.answers-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;width:min(510px,100%)}.answer-option{border:2px solid #eeeafb;background:#fcfbff;color:#514c74;border-radius:15px;min-height:58px;font-size:clamp(17px,2.1vw,22px);font-weight:900;transition:background .15s,border-color .15s,transform .15s}.answer-option:hover{background:#f2edff;border-color:#a69ae9;transform:translateY(-2px)}.answer-index{display:inline-grid;place-items:center;margin-right:13px;border-radius:50%;width:23px;height:23px;background:#eeebfc;color:#897ed2;font-size:11px}.play-help{font-size:12px;color:#9c95af;margin:1px 0}.pizza-game{display:flex;align-items:center;gap:30px;margin:6px 0 0}.pizza-board{position:relative;width:min(30vh,225px);height:min(30vh,225px);border-radius:50%;background:#ce9556;box-shadow:0 8px 0 #ba783e,0 13px 19px #c1947d44;padding:8px}.pizza-piece{position:absolute;width:calc(50% - 8px);height:calc(50% - 8px);display:grid;place-items:center;background:#ffe8aa;border:1px solid #d7994f;font-size:clamp(21px,4vh,42px);transition:background .2s,transform .2s}.pizza-piece:hover{background:#ffd58a}.pizza-piece.selected{background:#f69f7a;transform:scale(.94)}.p1{top:8px;left:8px;border-top-left-radius:100%}.p2{top:8px;right:8px;border-top-right-radius:100%}.p3{bottom:8px;left:8px;border-bottom-left-radius:100%}.p4{bottom:8px;right:8px;border-bottom-right-radius:100%}.fraction-label{margin-top:17px;font-size:13px;color:#8b8fa3}.fraction-label strong{display:block;font-size:23px;color:#776ad0}.pizza-actions{display:grid;gap:10px}.pizza-actions .button{font-size:13px}.result-center{flex:1;min-height:0;display:grid;place-items:center;padding:16px}.result-card{background:#fff;border:1px solid #eeecf8;border-radius:26px;width:min(600px,100%);padding:34px;text-align:center;box-shadow:var(--shadow)}.result-emoji{font-size:70px}.result-card h1{font-size:clamp(24px,3vw,33px);margin:5px 0 17px}.result-explanation{color:#666b87;font-size:15px;line-height:1.9;background:#f7f7ff;border-radius:14px;padding:16px}.result-reward{border-radius:15px;background:#fff8e6;color:#b17a29;padding:10px 13px;font-size:13px;font-weight:900;margin:16px 0}.result-buttons{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:18px}.result-mini{font-weight:900;font-size:12px;color:#9d95c0}
@keyframes bob{0%,100%{translate:0 0}50%{translate:0 -10px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}
@media(max-width:980px){.site-nav{gap:15px}.guest-chip,.user-chip{display:none}.nav-wrap{gap:20px}.hero-inner{grid-template-columns:1fr 1fr}.mascot{scale:.8}.bunny{left:0}.fox{left:35%}.dino{left:66%}.world-grid{gap:13px}.world-card-content{padding:15px}.world-meta{flex-wrap:wrap}.feature-strip{gap:5px}}
@media(max-width:730px){.container{width:min(100% - 30px,1180px)}.site-header{height:67px}.nav-wrap{padding:0 15px;gap:10px}.brand{font-size:16px}.brand-mark{width:33px;height:33px}.mobile-toggle{display:block;order:3;border:0;background:#f5f3ff;border-radius:9px;padding:6px 10px;margin-left:auto}.site-nav{position:absolute;display:none;top:66px;left:0;right:0;padding:18px 25px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:18px;box-shadow:var(--shadow)}.site-nav.nav-open{display:flex}.nav-details{width:100%}.nav-dropdown{position:static;box-shadow:none;width:100%;margin-top:10px}.nav-actions{margin-left:auto}.nav-login{padding:7px 10px;font-size:12px}.nav-actions form{display:none}.hero-inner{display:flex;flex-direction:column;gap:0;min-height:initial}.hero-copy{padding:44px 0 0;text-align:center}.hero h1{letter-spacing:-1.5px}.hero-intro{font-size:14px;margin-inline:auto}.hero-buttons{justify-content:center}.hero-footnote{font-size:10px}.hero-art{height:260px;width:min(100%,420px)}.art-platform{bottom:20px;height:68px}.mascot{scale:.65;bottom:52px}.bunny{bottom:68px}.fox{bottom:67px}.dino{bottom:62px}.art-orbit{inset:5px 15px}.orbit-b{inset:27px 44px}.art-num{top:8px}.art-star{top:8px}.feature-strip{grid-template-columns:1fr;margin-top:17px;margin-bottom:55px;gap:4px}.feature{padding:10px 5px}.section-heading h2{font-size:26px}.world-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.world-illustration{height:110px}.world-emoji{font-size:65px}.world-card-content h3{font-size:18px}.world-meta{font-size:10px}.steps-grid{grid-template-columns:1fr}.step-card{padding:22px}.site-footer{flex-direction:column;text-align:center;align-items:center;gap:3px}.world-detail-hero{padding:25px}.world-detail-hero h1{font-size:29px}.world-detail-emoji{font-size:70px}.world-subheading{display:block}.stage-grid{grid-template-columns:1fr}.stats-grid{gap:8px}.stat-card{padding:17px}.login-card{padding:29px 21px}.play-topbar{height:60px;padding:7px 12px}.play-exit{padding:7px 8px}.play-progress{width:50%}.play-sound{font-size:0}.play-sound::after{content:"🔇";font-size:16px}.play-content{gap:6px;padding:7px 10px}.story-mascot{font-size:30px}.story-bubble{padding:7px 11px}.story-bubble p{font-size:11px}.play-card{border-radius:17px;padding:12px}.play-badge{margin-bottom:4px}.play-question{margin:0 0 6px}.answer-option{min-height:50px}.pizza-game{gap:12px}.pizza-board{width:min(25vh,170px);height:min(25vh,170px)}.pizza-actions .button{padding:8px;font-size:11px}.result-card{padding:24px 16px}.result-buttons .button{font-size:12px;min-height:42px}.world-card p{min-height:34px}}
@media(max-width:390px){.world-grid{grid-template-columns:1fr}.world-illustration{height:125px}.hero-buttons .button{font-size:12px}.world-detail-emoji{font-size:47px}.answer-index{margin-right:5px}.play-help{font-size:10px}}
@media(max-height:650px){.play-story{display:none}.play-card{padding:12px}.play-illustration{font-size:40px;margin:0 0 9px}.visual-count{font-size:30px;margin:0 0 10px}.pizza-board{width:150px;height:150px}.result-emoji{font-size:40px}.result-card{padding:15px}.result-card h1{font-size:23px}.play-help{display:none}}

/* Full textbook index: accessible semester selector and lesson-availability message. */
.semester-tabs{display:flex;gap:12px;margin-top:24px;border-bottom:1px solid var(--line);padding-bottom:14px}
.semester-tab{display:inline-flex;align-items:center;justify-content:center;min-width:140px;border:1px solid #e8e5f6;background:white;border-radius:13px;padding:11px 18px;font-weight:900;color:#706a8d;font-size:14px}
.semester-tab.active,.semester-tab[aria-current=page]{color:#fff;background:var(--purple);border-color:var(--purple);box-shadow:0 7px 16px #7666d722}
.upcoming-stage{border:1px dashed #e3dcf7;border-radius:14px;background:#fbfaff;color:#85809e;padding:14px 18px;font-size:13px;grid-column:1/-1}
.catalog-note{font-size:12px;line-height:1.8;color:#9296aa;margin-top:29px}
@media(max-width:730px){.semester-tab{min-width:0;flex:1}.unit-panel{padding:20px}.semester-tabs{gap:9px}}


/* Chapter mission boards and accessible numeric controls. */
.mission-board{margin:20px auto;max-width:560px;color:var(--text,#353344)}
.mission-board svg{width:200px;max-width:100%;display:block;margin:auto}
.mission-bar-row{display:flex;align-items:center;gap:12px;margin:12px 0}.mission-bar-row>span{min-width:40px}
.mission-bar{background:#8e81df;color:#fff;border-radius:9px;padding:10px;min-width:45px;text-align:right}
.fraction-tiles{display:flex;justify-content:center;flex-wrap:wrap;gap:4px}.fraction-tiles span{width:36px;height:42px;border:2px solid #7e71dd;border-radius:5px;padding:8px}.fraction-tiles .selected{background:#7e71dd;color:white}
.sequence-tile{display:inline-block;padding:14px 20px;margin:5px;border-radius:10px;background:#eee9fc;font-size:1.5rem}
.mission-equation{font-size:clamp(1.4rem,4vw,2rem);font-weight:700;padding:20px;background:#f4f0ff;border-radius:16px}
.mission-rectangle{padding:35px;border:4px solid #7e71dd;max-width:300px;margin:auto;background:#eee9fc}
.mission-circle{border:4px solid #7e71dd;border-radius:50%;width:180px;height:180px;display:grid;place-items:center;margin:auto}
.movement-grid{display:grid;gap:2px;max-width:500px;margin:auto}.movement-grid span{border:1px solid #aaa;padding:4px;min-width:0}
.mission-form label{display:block;text-align:left;margin-bottom:10px}.mission-input{display:flex;gap:10px}.mission-input input{min-width:0;flex:1;font-size:1.5rem;border:2px solid #b5ace8;border-radius:12px;padding:12px}.number-pad{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin:14px 0}.number-pad button{padding:14px 5px;border:1px solid #d6d0ef;border-radius:10px;background:#faf8ff;font-size:1.2rem;cursor:pointer}.number-pad button:focus-visible{outline:3px solid #7e71dd}
@media(max-width:600px){.mission-input{flex-direction:column}.number-pad{grid-template-columns:repeat(4,1fr)}.play-progress span{font-size:.8rem}}

/* Proportional mission visuals. Fraction tiles together represent one whole. */
.mission-board{width:min(560px,100%);margin:10px auto;min-height:0}
.mission-board svg{width:min(340px,100%);height:auto;max-height:25vh}
.mission-board>p{font-size:12px;margin-bottom:7px}
.fraction-tiles{display:grid;gap:0;width:min(480px,100%);border:2px solid #7e71dd;border-radius:7px;overflow:hidden;margin:auto}
.fraction-tiles span{width:auto;height:45px;border:0;border-right:1px solid #7e71dd;border-radius:0;padding:0;background:#fff}
.fraction-tiles span:last-child{border-right:0}
.fraction-tiles .selected{background:#9a8de4}
.mission-count{display:flex;flex-wrap:wrap;justify-content:center;gap:5px;font-size:clamp(16px,3vh,29px);max-width:450px;margin:auto}
.mission-bar-row{margin:7px 0;min-height:30px}
.mission-bar{min-width:0;overflow:visible;white-space:nowrap;padding:3px 8px;min-height:30px}
.mission-form{width:min(510px,100%)}
.mission-input input{padding:8px 12px}
.number-pad{margin:8px 0;gap:6px}.number-pad button{padding:6px 4px}
.sequence-tile{padding:8px 12px;margin:3px;font-size:1.15rem}
.movement-grid span{padding:1px;line-height:1.15;font-size:13px}
@media(max-height:650px){.mission-board svg{max-height:21vh}.mission-board{margin:5px auto}.number-pad button{padding:3px}.mission-form label{margin-bottom:4px;font-size:12px}.mission-input input{font-size:1.1rem;padding:5px 8px}.mission-board>p{display:none}}
@media(max-width:600px){.mission-input{flex-direction:row}.mission-input .button{padding:6px 10px;font-size:12px}.number-pad{grid-template-columns:repeat(7,1fr)}.number-pad button{font-size:1rem}.fraction-tiles span{height:34px}.mission-count{gap:3px}}

.mission-table{margin:auto;border-collapse:collapse;min-width:220px}.mission-table th,.mission-table td{border:2px solid #b5ace8;padding:8px 20px}.mission-table caption{margin-bottom:8px}.mission-table th{background:#eee9fc}