@import url('https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@400;500;700;800;900&family=Noto+Sans+JP:wght@400;500;600;700;800&display=swap');
:root{--ink:#25364b;--muted:#647489;--accent:#e8785d;--teal:#228a77;--bg:#f6f8fb;--line:#e8edf1;--mint:#e5f5ed;--round:'M PLUS Rounded 1c','Noto Sans JP',sans-serif;--font:'Noto Sans JP',system-ui,sans-serif}
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@keyframes feedback-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1150px){.topic-meta{font-size:10px}.welcome-art{width:188px;height:188px;right:-4px}.welcome-copy{max-width:70%}.welcome h2{font-size:20px}.daily-top strong{font-size:15px}.streak{font-size:11px}.badge-grid{grid-template-columns:repeat(2,1fr)}.mastery-row{gap:13px;padding:18px}.mastery-value{width:85px}.mastery-row .btn{font-size:11px}.companion-name{right:40px}}
@media(max-width:850px){.daily-card{display:none}.welcome-art{width:225px;height:225px;right:16px}.welcome{min-height:240px}.welcome-copy{max-width:70%}.welcome h2{font-size:23px}.welcome p{font-size:13px}.companion-name{right:79px}.mastery-row{flex-wrap:wrap}.mastery-name{min-width:150px}.mastery-value{width:80px}.mastery-row .btn{margin-left:auto}.stat-card{padding:17px}.stat-card strong{font-size:32px}.stat-card p{font-size:11px}.stat-grid{gap:12px}.review-hero h2{font-size:21px}.review-hero{padding:25px}.review-hero img{width:140px;height:140px}.question-card{padding:25px}.choice{font-size:19px}.nav-count{position:absolute;top:8px;right:7px;font-size:10px}.result-hero .page-title{font-size:24px}}
@media(max-width:600px){.topbar{padding-inline:20px}.top-caption{font-size:19px}.star-counter{font-size:12px}.star-counter svg{width:17px}.icon-btn{width:38px;height:38px}.welcome{min-height:222px;padding:23px 20px}.welcome h2{font-size:21px}.welcome-art{width:174px;height:174px;right:-9px;bottom:5px}.welcome-copy{max-width:72%}.welcome p{font-size:12px;max-width:175px}.welcome .pill{font-size:11px}.hero-link{font-size:12px;margin-top:13px;padding:8px 11px}.companion-change{font-size:10px;right:11px;top:11px;padding:5px 9px}.companion-name{right:31px;bottom:8px;font-size:10px}.nav-count{top:5px;right:23%;min-width:17px;height:17px;font-size:9px;padding:1px 3px}.topic{min-height:188px;padding:15px}.topic-meta{display:block;font-size:10px;margin-top:8px}.topic-meta span{display:block;min-height:15px}.topic p{font-size:12px}.topic-count{font-size:11px}.subject-tab small{font-size:11px}.footer-note{font-size:12px}.section-row small{font-size:12px}.challenge 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@media(max-width:365px){.main{padding-inline:15px}.topbar{padding-inline:17px}.page-title{font-size:21px}.welcome-art{width:150px;height:150px;right:-13px}.welcome h2{font-size:19px}.welcome p{max-width:160px}.grade-picker button{padding:7px 6px;font-size:11px}.topic h3{font-size:14px}.result-mascot{width:125px;height:125px}.score-circle{width:128px;height:128px}.collection-hero img{width:105px;height:105px}.collection-hero h2{font-size:18px}.top-actions{gap:7px}}
.nav button{font-size:14px;gap:10px;padding-inline:12px}.nav-label{white-space:nowrap}.companion-change{min-height:36px}.companion-name{font-size:12px}.question-help,.topic-meta,.topic-count,.badge-state,.badge-card p,.badge-card>small{font-size:12px}.topic-meta{flex-wrap:wrap}.stat-card p{font-size:12px}.topic p{font-size:13px}.subtitle{font-size:14px}.subject-tab small{font-size:12px}.daily-bottom{font-size:13px}.section-description{font-size:14px}.setting-row small{font-size:13px}.companion-option small{font-size:12px}.brand small{font-size:11px}.top-caption{font-size:14px}
@media(max-width:600px){.nav button{padding-inline:2px;gap:4px}.nav-label{font-size:11px}.top-caption{font-size:19px}.topic-meta{font-size:11px}.topic p{font-size:12px}.subject-tab small{font-size:11px}.subtitle{font-size:13px}.topic{min-height:193px}.companion-change{min-height:33px;font-size:11px;top:8px}.companion-option{flex-direction:column;text-align:center}.companion-option img{width:83px;height:83px}.companion-option small{font-size:12px}.badge-card p{font-size:12px}.badge-state{font-size:11px}.stat-card p{font-size:11px}.stat-card>span{font-size:12px}.stat-card{padding-inline:9px}.mastery-name small,.session-name small{font-size:12px}.section-description{font-size:13px}}