:root{--reader-bg:#edf4f8;--paper:#fff;--ink:#12344a;--muted:#587080;--line:#d8e6ec;--accent:#067b99;--soft:#edf8fc}html[data-theme=dark]{--reader-bg:#101d28;--paper:#192b38;--ink:#e7f4fb;--muted:#aec7d4;--line:#304a59;--accent:#76d2ec;--soft:#203d4a}*{box-sizing:border-box}body{margin:0;background:var(--reader-bg);color:var(--ink);font-family:system-ui,-apple-system,sans-serif}button,a,select{-webkit-tap-highlight-color:transparent}button,select{font:inherit}button{cursor:pointer;background:var(--soft);color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:11px 15px}button:hover{border-color:var(--accent)}button:disabled{opacity:.5;cursor:not-allowed}a{color:var(--accent)}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}[hidden]{display:none!important}.reader-shell{max-width:1190px;padding:40px 24px;margin:auto}.reader-heading{display:flex;justify-content:space-between;gap:20px;align-items:start}.reader-heading h1{font-size:clamp(30px,5vw,54px);letter-spacing:-.05em;margin:6px 0}.reader-heading p{color:var(--muted)}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.15em;color:var(--accent)}.reader-levels{display:flex;flex-wrap:wrap;gap:10px;margin:28px 0}.reader-levels button[aria-pressed=true]{background:var(--ink);color:var(--paper);border-color:var(--ink)}.reader-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(280px,1fr);gap:24px;align-items:start}.reading-paper,.word-paper{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:32px;box-shadow:0 10px 30px #10354908;min-width:0}.paper-meta{display:flex;justify-content:space-between;font-size:11px;letter-spacing:.08em;color:var(--muted);font-weight:750}.reading-paper h2{font-size:clamp(25px,3vw,35px);letter-spacing:-.03em;line-height:1.35;margin:25px 0 6px;overflow-wrap:anywhere}.subtitle{color:var(--muted);margin:0 0 25px}.task-prompt{padding:16px;border-left:3px solid var(--accent);background:var(--soft);font-size:15px;line-height:1.6;margin-bottom:22px}.listen-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.listen-bar label{font-size:13px;margin-left:auto}.listen-bar select{background:var(--paper);color:var(--ink);padding:8px;border:1px solid var(--line);border-radius:8px}.hint{font-size:12px;line-height:1.7;color:var(--muted)}.passage{font-size:19px;line-height:2.1;overflow-wrap:anywhere;margin:24px 0}.passage[lang=ja]{font-size:21px;line-height:2.2}.token{display:inline;padding:0 1px;background:transparent;border:0;border-radius:3px;line-height:inherit;color:inherit;font-size:inherit}.token.focus-word{text-decoration:underline;text-decoration-color:#69bed6;text-decoration-style:dotted;text-underline-offset:6px}.token:hover,.token[aria-pressed=true]{background:var(--soft);color:var(--accent)}.paragraph-play{display:block;font-size:11px;line-height:1.4;margin:10px 0 18px;padding:5px 10px}.reading-paper details{border-top:1px solid var(--line);padding:16px 0;line-height:1.8}.reading-paper summary{cursor:pointer;font-weight:700}.reading-paper details p{font-size:15px;color:var(--muted)}.word-paper{position:sticky;top:20px;padding:26px}.word-paper h2{font-size:30px;overflow-wrap:anywhere;margin:18px 0 8px}.word-paper #reading{color:var(--accent);font-size:16px}.word-paper #meaning{font-size:18px;font-weight:650;line-height:1.6}.word-paper #usage{font-size:13px;color:var(--muted);line-height:1.7}.word-paper blockquote{margin:20px 0;padding:18px;background:var(--soft);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;line-height:1.6;overflow-wrap:anywhere}.word-paper blockquote p{margin:0 0 8px}.word-paper blockquote small{color:var(--muted)}.word-actions{display:flex;gap:7px;flex-wrap:wrap}.word-actions button{padding:9px 11px;font-size:12px}.status{min-height:1.5em;font-size:12px;line-height:1.6;color:var(--accent)}.practice{border-top:1px dashed var(--line);margin-top:18px;padding-top:6px}.practice button{display:block;margin:10px 0;width:100%}.practice audio{width:100%;margin:10px 0}.practice h3{margin:16px 0 6px;font-size:19px}#practice-status{font-size:13px;line-height:1.6}.saved{margin-top:24px;line-height:1.8}.saved summary{cursor:pointer;font-size:13px;font-weight:700}#saved-count{color:var(--accent)}#saved-words{display:flex;flex-wrap:wrap;gap:6px;padding-top:12px}#saved-words button{font-size:12px}.motivation{font-size:13px;line-height:1.8;color:var(--muted);padding-top:20px;margin-top:24px;border-top:1px solid var(--line)}.comprehension{margin-top:22px;padding:20px;background:var(--soft);border-radius:14px}.comprehension h3{font-size:17px;line-height:1.6}.comprehension button{display:block;text-align:left;width:100%;margin:8px 0;background:var(--paper)}.comprehension button.correct{border:2px solid #148966}.comprehension button.wrong{border:2px solid #c46551}#answer-feedback{font-size:13px;line-height:1.7}.source{font-size:12px;line-height:1.8;color:var(--muted);border-top:1px solid var(--line);margin-top:26px;padding-top:12px}.source a{display:inline-block;margin-right:16px}.back{display:inline-block;margin-top:28px;font-size:14px}@media(max-width:820px){.reader-grid{grid-template-columns:1fr}.word-paper{position:static}.reader-shell{padding:26px 16px}.reading-paper,.word-paper{padding:24px;border-radius:18px}.reader-heading h1{font-size:36px}}@media(max-width:430px){.reader-shell{padding:22px 12px}.reading-paper,.word-paper{padding:20px}.passage{font-size:17px}.passage[lang=ja]{font-size:19px}.reader-heading p{font-size:13px}.listen-bar button{font-size:12px;padding:9px}.reader-levels{gap:6px}.reader-levels button{font-size:13px;padding:10px}.listen-bar label{margin-left:0}}
.edition-label{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted);margin-top:25px}.edition-label select{background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:10px;padding:9px 12px;font:inherit}

/* Keep vocabulary beside the selected word without moving the reading page. */
.reader-shell{max-width:900px}.reader-grid{grid-template-columns:minmax(0,1fr)}
.word-paper{position:fixed;z-index:300;display:flex;flex-direction:column;padding:0;border-radius:18px;box-shadow:0 12px 48px #10354930;overflow:hidden;overflow-wrap:anywhere;background:var(--paper);isolation:isolate}
.word-card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;border-bottom:1px solid var(--line);flex-shrink:0;background:var(--paper)}
.word-card-header .eyebrow{margin:0}.word-card-header button{min-width:44px;min-height:44px;padding:7px;border-radius:50%}
.word-card-scroll{padding:0 20px 18px;overflow:auto;min-height:0;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;scrollbar-gutter:stable}
.word-paper h2{font-size:26px;margin-top:14px}.word-paper #meaning{font-size:17px}.word-paper blockquote{padding:12px;margin:14px 0}
.word-paper .practice{border-radius:12px;padding:8px 12px;margin-top:12px}.word-paper .practice h3{margin-top:8px}
.reader-notebook{padding:0 12px}.reader-notebook .saved{margin-top:0}

.passage[lang=zh]{font-size:21px;line-height:2.2}.passage[lang=ko]{word-break:keep-all;overflow-wrap:anywhere}@media(max-width:430px){.passage[lang=zh]{font-size:19px}}