:root{--bg:#f1f7f4;--surface:#fff;--text:#1e293b;--sub:#64748b;--line:#d6e5de;--muted-bg:#e2eee8;--primary:#0b8063;--primary-dark:#086550;--primary-soft:#dcf3ec;--correct:#16a34a;--correct-soft:#e4f8ea;--wrong:#ef4444;--wrong-soft:#fdecec;--radius:18px;--shadow:0 6px 20px #0a3c2d14;color:var(--text);background:var(--bg);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;font-family:Hiragino Maru Gothic ProN,BIZ UDPGothic,Hiragino Sans,system-ui,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);overscroll-behavior:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}input,textarea{-webkit-user-select:text;user-select:text;-webkit-touch-callout:default}button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation;background:0 0;border:none}button:disabled{cursor:default}p{margin:0}.app{flex-direction:column;max-width:600px;height:100%;margin:0 auto;display:flex}.app-header{padding:calc(env(safe-area-inset-top) + 14px) 20px 8px}.app-header h1{overflow-wrap:anywhere;margin:0;font-size:26px}.app-header.with-action{justify-content:space-between;align-items:center;gap:8px;display:flex}.app-header.with-back{padding-top:calc(env(safe-area-inset-top) + 4px)}.app-header.with-back h1{font-size:22px}.header-row{justify-content:space-between;align-items:center;gap:8px;display:flex}.header-context{background:var(--primary-soft);color:var(--primary-dark);border-radius:999px;flex-shrink:0;padding:3px 10px;font-size:13px;font-weight:700}.back-btn{color:var(--primary);margin-left:-6px;padding:8px 6px;font-size:16px;font-weight:700}.app-main{flex:1;min-height:0;overflow-y:auto}.content{padding:8px 20px 24px}.action-bar{padding:12px 20px calc(env(safe-area-inset-bottom) + 12px);border-top:1px solid var(--line);background:var(--surface)}.action-bar.stack{flex-direction:column;gap:10px;display:flex}.primary-btn,.secondary-btn{border-radius:14px;width:100%;padding:14px 16px;font-size:17px;font-weight:700;display:block}.primary-btn{background:var(--primary);color:#fff}.primary-btn:active{background:var(--primary-dark)}.primary-btn:disabled{opacity:.4}.secondary-btn{background:var(--primary-soft);color:var(--primary-dark)}.ghost-btn,.danger-btn{border-radius:14px;width:100%;padding:14px 16px;font-size:17px;font-weight:700;display:block}.ghost-btn{color:var(--sub)}.ghost-btn.outline{border:2px solid var(--line);color:var(--text)}.danger-btn{background:var(--wrong);color:#fff}.text-btn{color:var(--sub);padding:8px 4px;font-size:16px}.icon-btn{border-radius:50%;flex-shrink:0;width:44px;height:44px;font-size:20px}.icon-btn:active{background:var(--muted-bg)}.gear-icon{width:24px;height:24px;margin:auto;display:block}.section-title{color:var(--sub);margin:8px 0 10px;font-size:14px}.level-cards{gap:10px;margin-bottom:20px;display:flex}.level-card{border:2px solid var(--line);border-radius:var(--radius);background:var(--surface);text-align:center;flex:1;padding:14px 8px}.level-card.active{border-color:var(--primary);background:var(--primary-soft)}.level-name{font-size:17px;font-weight:700;display:block}.level-card.active .level-name{color:var(--primary-dark)}.level-note{color:var(--sub);margin-top:3px;font-size:13px;display:block}.review-card{border-radius:var(--radius);background:var(--wrong-soft);color:#b91c1c;justify-content:space-between;align-items:center;width:100%;margin-bottom:14px;padding:14px 16px;font-weight:700;display:flex}.review-card:disabled{background:var(--muted-bg);color:var(--sub)}.review-count{font-size:15px}.lesson-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.lesson-row{border-radius:var(--radius);background:var(--surface);width:100%;box-shadow:var(--shadow);text-align:left;align-items:center;gap:12px;padding:14px 16px;display:flex}.lesson-row:active{background:var(--primary-soft)}.lesson-text{flex:1;min-width:0}.lesson-title{font-weight:700;display:block}.lesson-summary{color:var(--sub);margin-top:3px;font-size:13px;display:block}.lesson-count{color:var(--sub);font-variant-numeric:tabular-nums;flex-shrink:0;font-size:14px}.lesson-count.done{color:var(--correct);font-weight:700}.segmented{background:var(--muted-bg);border-radius:12px;padding:3px;display:flex}.segmented button{color:var(--sub);border-radius:10px;flex:1;padding:8px 0;font-size:15px}.segmented button.on{background:var(--surface);color:var(--text);font-weight:700;box-shadow:0 1px 4px #00000014}.setting-row{border-radius:var(--radius);background:var(--surface);width:100%;box-shadow:var(--shadow);text-align:left;align-items:center;gap:12px;margin-bottom:20px;padding:12px 16px;display:flex}.switch{background:var(--line);border-radius:15px;flex-shrink:0;width:50px;height:30px;transition:background .2s;position:relative}.switch:after{content:"";background:var(--surface);border-radius:50%;width:24px;height:24px;transition:transform .2s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #00000040}.switch.on{background:var(--primary)}.switch.on:after{transform:translate(20px)}.shelf-tabs{margin-bottom:14px}.create-own{border:2px dashed var(--primary);border-radius:var(--radius);background:var(--primary-soft);width:100%;color:var(--text);text-align:left;align-items:center;gap:14px;margin-top:10px;padding:14px 16px;display:flex}.create-own:active{background:var(--muted-bg)}.create-own-plus{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:24px;font-weight:700;display:flex}.create-own-text{flex-direction:column;gap:2px;min-width:0;display:flex}.create-own-title{color:var(--primary-dark);font-size:17px;font-weight:700}.create-own-sub{color:var(--sub);font-size:13px}.work-parts{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);margin:0;padding:0;list-style:none}.work-part{align-items:center;gap:12px;padding:12px 16px;display:flex}.work-part+.work-part{border-top:1px solid var(--line)}.work-name-input{margin:0 0 18px}.pick-grades,.pick-lessons,.pick-questions{margin:0;padding:0;list-style:none}.pick-grades{flex-direction:column;gap:10px;display:flex}.pick-grade{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);overflow:hidden}.pick-grade-head{text-align:left;align-items:center;gap:10px;width:100%;padding:14px 16px;font-weight:700;display:flex}.pick-grade-title{flex:1;min-width:0}.pick-arrow{color:var(--sub);flex-shrink:0;font-size:13px}.pick-count{color:var(--primary);font-variant-numeric:tabular-nums;flex-shrink:0;font-size:14px;font-weight:700}.pick-lesson{border-top:1px solid var(--line)}.pick-lesson-row{align-items:center;gap:4px;padding-left:12px;display:flex}.pick-lesson-head{text-align:left;flex:1;align-items:center;gap:10px;min-width:0;padding:12px 16px 12px 6px;display:flex}.pick-lesson-title{flex:1;min-width:0;font-size:15px}.pick-check{border:2px solid var(--line);background:var(--surface);color:#fff;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:26px;height:26px;margin:8px;font-size:16px;font-weight:700;display:flex}.pick-check.on{border-color:var(--primary);background:var(--primary)}.pick-questions{padding:0 0 8px 34px}.pick-question{text-align:left;align-items:flex-start;gap:4px;width:100%;padding:4px 16px 4px 0;display:flex}.pick-question .pick-check{border-radius:6px;width:22px;height:22px;margin:2px 6px 0 0;font-size:14px}.pick-question-text{flex:1;min-width:0;font-size:14px;line-height:1.5}.pick-question-answer{color:var(--sub);font-size:12px;display:block}.delete-link{width:100%;color:var(--wrong);text-align:center;margin-top:24px;padding:10px;font-size:15px;display:block}.delete-confirm{border-radius:var(--radius);background:var(--wrong-soft);flex-direction:column;gap:10px;margin-top:24px;padding:16px;display:flex}.delete-confirm p{margin:0;font-size:14px;line-height:1.6}.delete-btn{background:var(--wrong);color:#fff;border-radius:14px;width:100%;padding:14px 16px;font-size:17px;font-weight:700;display:block}.point{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);margin-bottom:16px;padding:16px}.point h2{color:var(--primary-dark);margin:0 0 8px;font-size:17px}.point p{line-height:1.7}.point strong,.example-en strong{color:var(--primary-dark)}.table-wrap{margin-top:12px;overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px}th,td{border:1px solid var(--line);text-align:left;padding:8px 10px}th{background:var(--primary-soft);white-space:nowrap}.examples{margin:12px 0 0;padding:0;list-style:none}.examples li{border-top:1px solid var(--line);align-items:center;gap:8px;padding:10px 0;display:flex}.example-text{flex:1;min-width:0}.example-en{font-size:17px;line-height:1.5}.example-ja{color:var(--sub);margin-top:2px;font-size:14px}.speak-btn{width:40px;height:40px;color:var(--primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.speaker-icon{width:24px;height:24px}.speak-btn:active{background:var(--primary-soft)}.progress{background:var(--muted-bg);border-radius:4px;height:8px;margin:6px 0;overflow:hidden}.progress-bar{background:var(--primary);border-radius:4px;height:100%;transition:width .25s}.instruction{color:var(--sub);font-size:14px}.question-ja{margin-top:8px;font-size:17px;font-weight:700;line-height:1.6}.question-en{margin-top:16px;font-size:22px;line-height:1.7}.rewrite-task{color:var(--primary-dark);margin-top:12px;font-size:15px;font-weight:700}.rewrite-task+.question-en{margin-top:4px}.blank{border-bottom:2px solid var(--primary);min-width:3em;color:var(--primary-dark);text-align:center;margin:0 2px;padding:0 6px;font-weight:700;display:inline-block}.options{flex-direction:column;gap:10px;margin-top:18px;display:flex}.option{border:2px solid var(--line);background:var(--surface);border-radius:14px;padding:14px 16px;font-size:18px}.option:not(:disabled):active{background:var(--primary-soft)}.order-answer,.order-chips,.fix-words{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.order-answer{border:2px dashed var(--line);background:var(--surface);border-radius:14px;min-height:76px;margin-top:16px;padding:10px}.order-chips{margin-top:14px}.answer-btn,.fix-words{margin-top:18px}.chip{border:2px solid var(--line);background:var(--surface);border-radius:12px;padding:9px 13px;font-size:18px}.chip.placed,.chip.selected,.option.selected{border-color:var(--primary);background:var(--primary-soft)}.order-chips .chip:disabled{opacity:.25}.option.correct,.chip.correct{border-color:var(--correct);background:var(--correct-soft);font-weight:700}.option.wrong,.chip.wrong{border-color:var(--wrong);background:var(--wrong-soft)}.write-input{border:2px solid var(--line);background:var(--surface);width:100%;color:var(--text);font:inherit;resize:none;border-radius:14px;margin-top:16px;padding:12px 14px;font-size:18px;line-height:1.5;display:block}.write-input:focus{border-color:var(--primary);outline:none}.write-input:disabled{opacity:1;-webkit-text-fill-color:var(--text)}.write-input.correct{border-color:var(--correct);background:var(--correct-soft)}.write-input.wrong{border-color:var(--wrong);background:var(--wrong-soft)}.end-mark{color:var(--sub);font-size:20px}.hint{color:var(--sub);margin-top:8px;font-size:13px}.feedback{border-radius:var(--radius);margin-top:20px;padding:14px 16px}.feedback.correct{background:var(--correct-soft)}.feedback.wrong{background:var(--wrong-soft)}.feedback-title{font-size:18px;font-weight:700}.feedback-sentence{justify-content:space-between;align-items:center;gap:8px;margin-top:6px;font-size:18px;font-weight:700;line-height:1.5;display:flex}.feedback-fix{margin-top:4px;font-size:15px}.feedback-why{margin-top:6px;font-size:15px;line-height:1.7}.result{text-align:center;padding:56px 24px}.result-emoji{font-size:60px}.result-score{margin-top:12px;font-size:20px;font-weight:700}.result-note{color:var(--sub);margin-top:8px;line-height:1.6}.empty{color:var(--sub);text-align:center;padding:48px 20px}.about-card h2{color:var(--primary-dark);margin:0 0 8px;font-size:17px}.about-licenses{background:var(--bg);white-space:pre-wrap;overflow-wrap:anywhere;-webkit-user-select:text;user-select:text;border-radius:8px;max-height:50vh;margin:0;padding:10px;font-size:11px;line-height:1.4;overflow:auto}.about-licenses-btn{margin-top:10px}.sheet-backdrop{z-index:10;background:#0a281e59;justify-content:center;align-items:flex-end;animation:.15s ease-out fade-in;display:flex;position:fixed;inset:0}.sheet{width:100%;max-width:600px;max-height:94%;padding-bottom:calc(env(safe-area-inset-bottom) + 16px);background:var(--bg);border-radius:24px 24px 0 0;animation:.22s ease-out slide-up;overflow-y:auto}.sheet-top{z-index:3;background:var(--bg);position:sticky;top:0}.sheet-header{border-bottom:1px solid var(--line);background:var(--bg);justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.sheet-header-spacer{width:64px}.sheet-header h2{margin:0;font-size:17px}.sheet-body{flex-direction:column;gap:18px;padding:18px 20px;display:flex}.form-actions{flex-direction:column;gap:12px;margin-top:4px;display:flex}.saved-flash{background:var(--correct-soft);color:var(--correct);border-radius:12px;padding:10px 14px;font-size:14px;font-weight:700;animation:.2s ease-out fade-in}.saved-flash.error{background:var(--wrong-soft);color:var(--wrong)}.backup-section{border-radius:var(--radius);background:var(--surface);flex-direction:column;gap:8px;padding:16px;display:flex}.backup-title{margin:0;font-size:17px;font-weight:700}.backup-desc{color:var(--sub);margin:0 0 6px;font-size:14px;line-height:1.5}.auto-list{margin:0;padding:0;list-style:none}.auto-list li{border-bottom:1px solid var(--line);align-items:center;gap:8px;padding:10px 0;font-size:14px;display:flex}.auto-list li:last-child{border-bottom:none}.auto-date{white-space:nowrap}.auto-reason{color:var(--sub);flex:1;font-size:12px}.auto-reason.before-delete,.auto-reason.before-replace{color:var(--wrong)}.auto-restore{background:var(--primary-soft);color:var(--primary-dark);border-radius:999px;flex-shrink:0;padding:6px 12px;font-size:13px;font-weight:700}@keyframes fade-in{0%{opacity:0}}@keyframes slide-up{0%{transform:translateY(100%)}}