:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.toolbar__actions a[href="#/"]>.btn{font-size:0!important}.toolbar__actions a[href="#/"]>.btn:after{content:"ホーム画面";font-size:13px}.toolbar__actions a[href="#/select"]>.btn{font-size:0!important}.toolbar__actions a[href="#/select"]>.btn:after{content:"難易度選択";font-size:13px}.toolbar__actions .btn-primary{font-size:0!important}.toolbar__actions .btn-primary:after{content:"次の問題";font-size:13px}.difficulty-badge__label{font-size:0!important}.difficulty-badge__label:after{content:"難易度";font-size:11px;letter-spacing:.06em;color:#1e3a8a;text-transform:none}.character__difficulty-label{font-size:0!important}.character__difficulty-label:after{content:"難易度";font-size:12px}