:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:#17372a;background:#eef7f0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0}nav[aria-label=保護者向け]{text-align:right;padding:12px 24px}nav[aria-label=保護者向け] a,.auth-card a{align-items:center;min-height:44px;display:inline-flex}.auth-card{overflow-wrap:anywhere}.auth-card input{width:100%;min-height:44px;margin:8px 0;display:block}.auth-card button{white-space:normal;min-width:44px;min-height:44px}button,input{font:inherit}main{place-items:center;min-height:100svh;padding:16px;display:grid}.learning-card{background:#fff;border-radius:28px;width:min(100%,680px);padding:clamp(24px,6vw,48px);box-shadow:0 16px 42px #1d4a331f}.eyebrow{color:#1b6f47;letter-spacing:.04em;margin:0;font-weight:800}h1{margin:8px 0 16px;font-size:clamp(2rem,8vw,3.25rem);line-height:1.15}h1:focus{outline:none}.intro,p{line-height:1.7}fieldset{border:0;margin:24px 0;padding:0}legend{margin-bottom:10px;font-size:1.05rem;font-weight:800}.option-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.option,.choice{cursor:pointer;border:2px solid #bfd5c7;border-radius:14px;align-items:center;gap:10px;min-height:52px;padding:10px 14px;display:flex}:is(.option:has(input:checked),.choice:has(input:checked)){background:#e7f6ec;border-color:#147245;font-weight:700}input[type=radio]{accent-color:#147245;width:20px;height:20px}.fixed-setting{background:#f1f6f2;border-radius:14px;justify-content:space-between;padding:14px 16px;display:flex}.primary-button,.secondary-button,.danger-button{cursor:pointer;border-radius:14px;width:100%;min-height:52px;padding:12px 18px;font-weight:800}.primary-button{color:#fff;background:#12653e;border:2px solid #12653e}.secondary-button{color:#12653e;background:#fff;border:2px solid #12653e;margin-top:10px}.danger-button{color:#8a281b;background:#fff;border:2px solid #9b2f20;margin-top:24px}button:disabled{cursor:not-allowed;opacity:.45}button:focus-visible,input:focus-visible{outline-offset:3px;outline:4px solid #f0a51a}label:has(input:focus-visible){outline-offset:3px;outline:4px solid #f0a51a}.notice,.warning{background:#fff4d6;border-radius:12px;margin-top:24px;padding:14px;font-size:.9rem}.save-status{background:#e7f6ec;border-radius:12px;margin:16px 0;padding:14px;font-weight:700}.progress{background:#e7f6ec;border-radius:999px;margin:0 0 16px;padding:6px 12px;font-weight:800;display:inline-block}.question-prompt{margin:8px 0 28px;font-size:clamp(1.4rem,5vw,2rem);font-weight:750;line-height:1.55}.answer-form{gap:22px;display:grid}.choice-list{gap:10px;display:grid}.text-answer{gap:8px;font-weight:800;display:grid}.text-answer input{border:2px solid #8eaa99;border-radius:12px;width:100%;min-height:56px;padding:10px 14px;font-size:1.35rem}.text-answer small{font-weight:400}.review{padding-top:6px}.result-label{margin:0 0 12px;font-size:2rem;font-weight:900}.correct .result-label{color:#12653e}.incorrect .result-label{color:#a33d23}.explanation{background:#f1f6f2;border-radius:16px;margin:24px 0;padding:18px}.explanation h2{margin-top:0;font-size:1.15rem}.summary-score{font-size:1.35rem}.summary-score strong{font-size:2.6rem}.summary dl{margin:24px 0}.summary dl div{border-bottom:1px solid #dce8df;justify-content:space-between;padding:12px 0;display:flex}.summary dt{font-weight:700}.summary dd{margin:0}.history-list,.answer-history-list{gap:16px;margin:24px 0;padding:0;list-style:none;display:grid}.history-card,.answer-history-list li{background:#f8fbf9;border:1px solid #d3e2d8;border-radius:16px;padding:18px}.history-date{margin-top:0;font-weight:800}.history-card dl,.history-summary,.answer-history-list dl{margin:12px 0}.history-card dl div,.history-summary div,.answer-history-list dl div{border-bottom:1px solid #dce8df;grid-template-columns:minmax(5.5rem,1fr) minmax(0,2fr);gap:12px;padding:8px 0;display:grid}.history-card dt,.history-summary dt,.answer-history-list dt{font-weight:700}.history-card dd,.history-summary dd,.answer-history-list dd{overflow-wrap:anywhere;margin:0}.answer-history-list h2{margin:0;font-size:1.2rem}.empty-state{background:#f1f6f2;border-radius:16px;margin:24px 0;padding:18px}@media (max-width:359px){main{padding:8px}.learning-card{border-radius:18px;padding:20px 16px}.option-grid{grid-template-columns:1fr}.history-card dl div,.history-summary div,.answer-history-list dl div{grid-template-columns:1fr;gap:2px}}@media (min-width:768px){main{padding:32px}.learning-card{padding:52px 64px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}