:root{--bg:#f4f1e9;--paper:#fffefa;--ink:#20332f;--muted:#626e66;--teal:#155f50;--hover:#104c40;--pale:#e8efe8;--line:#d7ddd4;--amber:#835b19;--error:#9b3d30;--radius:8px;font-family:"Yu Gothic UI","Hiragino Kaku Gothic ProN","Meiryo",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}button{border:0;background:none}button:disabled{opacity:.5;cursor:default}a{color:var(--teal)}:focus-visible{outline:3px solid #a47b35;outline-offset:3px}textarea:focus-visible{outline-offset:0}[hidden]{display:none!important}.header{max-width:1380px;margin:auto;padding:26px 40px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{text-decoration:none;display:flex;gap:12px;align-items:center;font-size:20px;letter-spacing:-.5px;color:var(--ink);font-weight:700}.brand-mark{display:grid;place-items:center;background:var(--teal);color:var(--paper);width:34px;height:38px;font-size:21px;border-radius:4px}.header nav{display:flex;gap:16px}.header nav button,.footer button{font-size:14px;color:var(--muted);min-height:44px;padding:8px}#list-count{background:#e4e9e0;border-radius:4px;padding:2px 6px;margin-left:5px;font-size:12px}.notice{max-width:1260px;margin:0 auto 12px;background:#fff0d6;color:#6d491b;padding:12px 18px;font-size:14px}.paper{max-width:1300px;margin:8px auto 36px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:48px;min-height:650px}.study-grid{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(0,1fr);gap:48px}.reading{min-width:0}.reading h1{font-size:29px;line-height:1.65;margin:0 0 32px;font-weight:700;letter-spacing:.02em}.reading-text{font-size:20px;line-height:2.15;line-break:strict;overflow-wrap:anywhere;text-align:justify;letter-spacing:.025em}.reading-text p{margin:0 0 24px}.token{padding:0;border:0;border-radius:2px;display:inline;background:transparent;line-height:inherit;letter-spacing:inherit;text-align:inherit;font:inherit;color:inherit;vertical-align:baseline;cursor:pointer;white-space:normal}.token:hover,.token.active{background:#e0eae2;text-decoration:underline;text-decoration-color:#8da896;text-underline-offset:5px}.token:focus-visible{outline-width:2px;outline-offset:2px}.tasks{min-width:0;border-left:1px solid var(--line);padding-left:40px}.question{border:0;padding:0;margin:0 0 34px;min-width:0}.question legend,.question-title{font-size:18px;font-weight:700;line-height:1.85;margin:0 0 16px;padding:0;display:block}.question-number{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums;display:block;margin-bottom:9px;font-weight:400}.choice{border:1px solid var(--line);border-radius:var(--radius);display:flex;align-items:flex-start;gap:13px;margin:10px 0;padding:15px 16px;cursor:pointer;transition:background .12s}.choice:hover{background:#f3f6ef}.choice:has(input:checked){border-color:var(--teal);background:var(--pale)}.choice input{accent-color:var(--teal);width:19px;height:19px;flex-shrink:0;margin:5px 0 0;cursor:pointer}.choice .choice-text{font-size:15px;line-height:1.9}.choice-radio{display:flex;min-width:24px;min-height:32px;align-items:flex-start}.hint{font-size:13px;color:var(--teal);text-align:left;padding:8px 0;min-height:40px}.hint-text{font-size:14px;line-height:1.9;background:#f2f5ed;border-left:3px solid #b3c2ae;padding:12px 15px;margin:8px 0 10px}.action{background:var(--teal);color:var(--paper);border-radius:var(--radius);padding:14px 20px;min-height:50px;font-size:16px;font-weight:600;display:inline-flex;justify-content:center;align-items:center;gap:8px;text-decoration:none}.action:hover{background:var(--hover)}.action.full{width:100%}.secondary{border:1px solid var(--line);background:var(--paper);border-radius:var(--radius);min-height:44px;padding:10px 16px;color:var(--teal);font-size:14px}.secondary:hover{background:var(--pale)}.quiet{padding:10px 0;color:var(--teal);font-size:14px;text-decoration:underline;text-underline-offset:4px;min-height:44px}.muted{font-size:13px;color:var(--muted);line-height:1.8}.actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:24px}.error-text{color:var(--error);font-size:14px;margin:8px 0}.source{font-size:12px;color:var(--muted);line-height:1.8;margin-top:24px}.source a{color:var(--muted)}.footer{max-width:1300px;margin:0 auto 20px;padding:0 8px;display:flex;justify-content:space-between;font-size:12px;color:var(--muted);align-items:center}.footer button{font-size:12px}.feedback-item{margin:0 0 28px;padding-bottom:24px;border-bottom:1px solid var(--line)}.feedback-item h2{font-size:19px;line-height:1.8}.feedback-item p{font-size:15px;line-height:1.9;margin:8px 0}.answer-label{font-size:12px;color:var(--muted);display:block;margin-bottom:6px}.correct{color:var(--teal)}.incorrect{color:var(--error)}.evidence{background:#f1f4eb;border-left:3px solid #a9bda8;padding:14px 17px;font-size:15px;line-height:2}.narrow{max-width:800px}.narrow h1,.list-page h1{font-size:28px;line-height:1.6;margin:0 0 28px}.narrow h2{font-size:19px;line-height:1.8}.narrow p{line-height:1.9}.textarea{display:block;width:100%;min-height:170px;resize:vertical;padding:16px;font-size:18px;line-height:1.8;background:var(--paper);color:var(--ink);border:1px solid #bfcabf;border-radius:var(--radius)}.rubric{padding:20px 0;line-height:2}.rubric label{display:block;margin:14px 0;font-size:15px}.rubric input{accent-color:var(--teal);width:18px;height:18px;vertical-align:middle;margin-right:10px}.hidden-passage{margin:22px 0}.list-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 0;border-bottom:1px solid var(--line)}.list-word{font-size:28px;font-weight:600}.list-context{font-size:14px;line-height:1.8;color:var(--muted);margin-top:4px}.list-type{font-size:12px;color:var(--muted)}.list-actions{display:flex;gap:14px;align-items:center}.remove{font-size:12px;color:var(--muted);min-height:44px;padding:8px}.list-toolbar{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:20px 0}.empty{padding:36px 0;line-height:2}.lookup{position:fixed;z-index:10;width:350px;background:var(--paper);border:1px solid #c9d3c7;border-radius:12px;box-shadow:0 12px 40px #20332f20;padding:22px;max-height:75vh;overflow:auto}.lookup-head{display:flex;justify-content:space-between;align-items:center;gap:10px}.lookup-word{font-size:30px;font-weight:700;color:var(--teal)}.lookup-close{min-width:44px;min-height:44px;font-size:13px;color:var(--muted)}.char-list{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.char-button{border:1px solid var(--line);border-radius:6px;min-width:48px;min-height:48px;font-size:24px}.char-button.selected{background:var(--pale);border-color:var(--teal)}.lookup-reading{font-size:21px;margin:18px 0 8px}.lookup-meaning{font-size:15px;line-height:1.9;margin-bottom:16px}.lookup-source{font-size:12px;color:var(--muted);line-height:1.8}.lookup .secondary{width:100%;margin-top:12px}.toast{position:fixed;z-index:20;bottom:28px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:12px 22px;border-radius:8px;font-size:14px;max-width:90vw}.menu-list{display:grid;gap:12px}.menu-item{text-align:left;border:1px solid var(--line);border-radius:8px;padding:22px;color:var(--ink);background:var(--paper)}.menu-item:hover{background:#f0f4ec}.menu-title{font-size:19px;font-weight:600;display:block;line-height:1.7}.menu-detail{font-size:13px;color:var(--muted);line-height:1.8;display:block;margin-top:5px}.review-context{font-size:28px;line-height:2;padding:24px 0}.review-char{font-size:70px;color:var(--teal);line-height:1.4}.reading-input{font-size:21px;padding:14px 16px;min-height:52px;width:100%;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink)}.finish-mark{font-size:44px;color:var(--teal);margin-bottom:18px}.small-title{font-size:13px;letter-spacing:.04em;color:var(--muted);font-weight:400;margin:0 0 18px}.library-section{margin:35px 0 14px;font-size:14px;color:var(--muted);font-weight:400}.saved-indicator{color:var(--teal);font-size:12px}.link-row{display:flex;gap:18px;flex-wrap:wrap}.divider{border:0;border-top:1px solid var(--line);margin:26px 0}.loading{max-width:1100px;margin:70px auto;padding:20px;color:var(--muted)}.help-cost{font-size:12px;color:var(--muted);line-height:1.7}.inline-status{font-size:13px;color:var(--muted);min-height:22px}.screen-reader{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1400px){.paper{padding:54px 56px}.study-grid{gap:54px}.tasks{padding-left:44px}.reading-text{font-size:21px}}
@media(max-width:900px){.header{padding:18px 24px}.paper{margin:0 20px 28px;padding:30px;min-height:600px}.study-grid{grid-template-columns:1fr;gap:28px}.tasks{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:28px}.reading h1{font-size:27px;margin-bottom:24px}.reading-text{font-size:21px;line-height:2.1}.question legend,.question-title{font-size:19px}.choice .choice-text{font-size:16px}.footer{padding:0 24px}.narrow{margin-left:auto;margin-right:auto;max-width:calc(100% - 40px)}}
@media(max-width:540px){.header{padding:14px 18px;gap:8px}.brand{font-size:18px;gap:8px}.brand-mark{width:30px;height:34px;font-size:19px}.header nav{gap:4px}.header nav button{font-size:13px;padding:7px}.paper{margin:0 10px 24px;padding:26px 20px;border-radius:8px}.reading h1{font-size:25px;line-height:1.7}.reading-text{font-size:20px;line-height:2.15;letter-spacing:.015em}.choice{padding:13px 12px;gap:10px}.question{margin-bottom:28px}.lookup{left:12px!important;right:12px!important;bottom:12px!important;top:auto!important;width:auto;max-height:66vh;padding:20px}.narrow{max-width:calc(100% - 20px)}.list-row{align-items:flex-start}.list-word{font-size:25px}.list-toolbar{gap:10px}.list-toolbar .action{width:100%}.notice{margin:0 12px 12px}.footer{padding:0 18px}.actions .action{width:100%}.list-actions{gap:4px}}
.toast{pointer-events:none}
.practice-paper{min-height:540px;padding:44px 48px}.practice-top{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;margin-bottom:26px}.practice-paper h1.practice-prompt{font-size:25px;line-height:1.8;margin-bottom:28px}.practice-material{font-size:21px;line-height:2.1;margin:24px 0;white-space:normal}.practice-material.recall-word{font-size:64px;font-weight:600;letter-spacing:.08em;line-height:1.5;margin:28px 0 14px;color:var(--teal)}.practice-context{font-size:17px;line-height:1.9;color:var(--muted);margin:0 0 34px}.practice-sentence{font-size:23px;line-height:2.1;padding:18px 0;margin-bottom:18px}.practice-feedback{margin-top:28px}.practice-feedback h2{font-size:21px}.practice-feedback p,.practice-feedback details{font-size:16px;line-height:1.95}.practice-feedback details{margin-top:20px}.practice-choices{margin-bottom:6px}.practice-choices .choice{padding:17px}.sentence-slots{border:1px dashed #b1c2b2;border-radius:8px;min-height:100px;padding:18px;margin:24px 0 18px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}.chunk-bank{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}.chunk{border:1px solid var(--line);background:var(--paper);border-radius:6px;padding:12px 16px;min-height:48px;line-height:1.7;font-size:18px}.chunk:hover{background:var(--pale)}.chunk.chosen{background:var(--pale);border-color:#b9cbbc}.chunk:disabled{opacity:.25}.chunk.chosen:disabled{opacity:1}
@media(max-width:540px){.practice-paper{padding:28px 22px;min-height:550px}.practice-paper h1.practice-prompt{font-size:22px}.practice-material.recall-word{font-size:56px}.practice-material{font-size:20px}.practice-context{font-size:16px}.practice-sentence{font-size:20px}.header nav{gap:0}.header nav button{padding:7px 5px;font-size:12px}.chunk{font-size:17px;padding:10px 12px}}
.time-picker{max-width:1300px;margin:2px auto 16px;display:flex;align-items:center;gap:20px;padding:0 4px}.time-label{color:var(--muted);font-size:14px}.time-options{display:flex;border:1px solid #cfd7cb;border-radius:8px;padding:4px;gap:4px;background:#eeeee5}.time-options label{cursor:pointer;position:relative}.time-options input{position:absolute;width:1px;height:1px;opacity:0}.time-options span{display:flex;align-items:center;justify-content:center;min-width:76px;min-height:42px;font-size:15px;border-radius:5px;color:var(--muted)}.time-options input:checked+span{color:var(--teal);font-weight:700;background:var(--paper);box-shadow:0 1px 3px #20332f12}.time-options input:focus-visible+span{outline:3px solid #a47b35;outline-offset:2px}
@media(max-width:1380px){.time-picker{margin-left:40px;margin-right:40px}}
@media(max-width:900px){.time-picker{margin:0 24px 16px}}
@media(max-width:540px){.time-picker{margin:0 20px 16px;justify-content:space-between;gap:10px}.time-label{font-size:13px}.time-options span{min-width:61px;min-height:44px;font-size:15px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.kanji-note { margin: 28px 0; padding-top: 16px; border-top: 1px solid var(--line, #deded4); }
.kanji-note h3 small { display:block; font-size:14px; font-weight:400; margin-top:8px; }
.usage-example { margin:16px 0; padding:12px 16px; background:#f5f4ed; border-radius:8px; }
.usage-example p { margin:4px 0; }
.practice-feedback [lang="en"] { line-height:1.7; }
.practice-feedback h3 { margin-top:24px; }
.practice-takeaway { border-left:3px solid #196254; padding:12px; }
.section-browser { margin-top:28px; border-top:1px solid #deded4; padding-top:16px; }
.section-links { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.play .choices{display:grid;gap:4px;margin:20px 0}.play button.choice{text-align:left;width:100%;font-size:18px;background:var(--paper)}.play button.choice.right{border-color:var(--teal);background:var(--pale)}.play button.choice.wrong{border-color:var(--error)}.play progress{width:180px;vertical-align:middle;accent-color:var(--teal)}.file-button{display:inline-flex;align-items:center;cursor:pointer}