:root{--md-sys-color-background:#fff;--md-sys-color-on-background:#1c1b1f;--md-sys-color-surface:#fdfdf5;--md-sys-color-on-surface:#1c1b1f;--md-sys-color-surface-variant:#e6e6da;--md-sys-color-on-surface-variant:#49454f;--md-sys-color-primary:#d6ca4c;--md-sys-color-on-primary:#343000;--md-sys-color-primary-container:#f3e670;--md-sys-color-on-primary-container:#1b1900;--md-sys-color-secondary:#606042;--md-sys-color-on-secondary:#fff;--md-sys-color-error:#ba1a1a;--md-sys-color-on-error:#fff;--md-sys-color-success:#386a20;--md-sys-color-on-success:#fff;--elevation-1:0 1px 3px 1px #0000001a, 0 1px 2px 0 #0000000f;--elevation-2:0 2px 6px 2px #0000001a, 0 1px 2px 0 #0000000f}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--md-sys-color-background);color:var(--md-sys-color-on-background);-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;font-family:Helvetica Neue,Arial,Hiragino Kaku Gothic ProN,Hiragino Sans,Meiryo,sans-serif;line-height:1.5;display:flex}#root{flex-direction:column;flex:1;display:flex}.container{flex-direction:column;flex:1;justify-content:center;width:100%;max-width:600px;margin:0 auto;padding:2rem;display:flex}h1,h2,h3,h4{margin-bottom:1rem;font-weight:600}.btn{cursor:pointer;border:none;border-radius:9999px;justify-content:center;align-items:center;gap:8px;padding:.75rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:500;text-decoration:none;transition:all .2s cubic-bezier(.2,0,0,1);display:inline-flex}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary);box-shadow:var(--elevation-1)}.btn-primary:hover:not(:disabled){background-color:var(--md-sys-color-primary-container);box-shadow:var(--elevation-2)}.btn-secondary{background-color:var(--md-sys-color-surface-variant);color:var(--md-sys-color-on-surface-variant)}.btn-secondary:hover:not(:disabled){background-color:#d8d8cc}.btn-icon{border-radius:50%;padding:.75rem}.card{background-color:var(--md-sys-color-surface);box-shadow:var(--elevation-1);border-radius:28px;flex-direction:column;width:100%;min-height:650px;padding:2rem;transition:box-shadow .2s;display:flex}.choice-btn{text-align:left;background-color:var(--md-sys-color-surface-variant);width:100%;color:var(--md-sys-color-on-surface-variant);cursor:pointer;border:2px solid #0000;border-radius:16px;margin-bottom:.75rem;padding:1rem 1.5rem;font-size:1.1rem;font-weight:500;transition:all .2s cubic-bezier(.2,0,0,1)}.choice-btn:hover:not(:disabled){background-color:#d8d8cc;transform:translateY(-2px)}.choice-btn:active:not(:disabled){transform:translateY(0)}.choice-btn.correct{background-color:var(--md-sys-color-success);color:var(--md-sys-color-on-success);transform:scale(1.02)}.choice-btn.wrong,.btn.wrong{background-color:var(--md-sys-color-error);color:var(--md-sys-color-on-error);animation:.4s cubic-bezier(.36,.07,.19,.97) both shake}@keyframes shake{10%,90%{transform:translate(-1px)}20%,80%{transform:translate(2px)}30%,50%,70%{transform:translate(-4px)}40%,60%{transform:translate(4px)}}.fade-in{animation:.4s ease-out fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.progress-bar-container{background-color:var(--md-sys-color-surface-variant);border-radius:4px;height:8px;margin-bottom:2rem;overflow:hidden}.progress-bar{background-color:var(--md-sys-color-primary);height:100%;transition:width .3s}input[type=file]{display:none}.checkbox-container{background-color:var(--md-sys-color-surface-variant);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:16px;align-items:center;gap:16px;margin-bottom:8px;padding:16px 20px;transition:background-color .2s,transform .1s;display:flex}.checkbox-container:hover{background-color:#d8d8cc}.checkbox-container:active{transform:scale(.98)}.checkbox-input{appearance:none;border:2px solid var(--md-sys-color-on-surface-variant);cursor:pointer;border-radius:6px;place-content:center;width:24px;height:24px;margin:0;transition:all .2s cubic-bezier(.2,0,0,1);display:grid}.checkbox-input:before{content:"";width:12px;height:12px;box-shadow:inset 1em 1em var(--md-sys-color-on-primary);background-color:var(--md-sys-color-on-primary);transform-origin:50%;clip-path:polygon(14% 44%,0 65%,50% 100%,100% 16%,80% 0%,43% 62%);transition:transform .12s ease-in-out;transform:scale(0)}.checkbox-input:checked{background-color:var(--md-sys-color-primary);border-color:var(--md-sys-color-primary)}.checkbox-input:checked:before{transform:scale(1)}.checkbox-label{color:var(--md-sys-color-on-surface);text-align:left;flex:1;font-size:1.1rem;font-weight:500}