:root{font:15px/1.7 system-ui,'Yu Gothic UI',Meiryo,sans-serif;color-scheme:light;--ink:#1d2d38;--muted:#596b79;--line:#dce4e8;--accent:#176350;--pale:#eaf4ef;--bg:#f5f7f9}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button,input,select{font:inherit;color:inherit}button{border:1px solid var(--line);background:white;padding:9px 15px;border-radius:8px;cursor:pointer}button:hover{background:#eff4f2;border-color:#a2b9ae}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #89b9d5;outline-offset:3px}button:disabled{opacity:.45;cursor:default}.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.primary:hover{background:#114b3d;color:#fff}.brand{font-weight:700;font-size:19px;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:10px}.brand span{color:var(--accent);font-size:28px}#header{display:flex;justify-content:space-between;align-items:center;gap:20px;background:white;padding:18px max(24px,calc((100vw - 1240px)/2));border-bottom:1px solid var(--line)}nav,.buttons{display:flex;gap:10px;flex-wrap:wrap}h1,h2,h3,p{margin-top:0}h1{font-size:28px;line-height:1.5}h2{font-size:22px}h3{font-size:16px;margin:25px 0 10px}#library{max-width:1240px;padding:40px 24px 70px;margin:auto}.heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:26px}.heading h1{margin-bottom:4px}.heading p{color:var(--muted);font-size:13px;margin:0}input[type=search],input[type=text]{border:1px solid var(--line);background:white;border-radius:8px;padding:10px 13px;max-width:100%}#search{width:300px}.filters{display:flex;gap:8px;margin-bottom:24px}.filters button{border:0;background:transparent;padding:7px 18px;color:var(--muted)}.filters button.selected{background:var(--pale);color:var(--accent);font-weight:700}#lessons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.lesson{background:white;border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;min-height:235px;padding:24px}.lesson h2{font-size:19px;line-height:1.6;margin:15px 0 12px;overflow-wrap:anywhere}.lesson .meta{font-size:13px;color:var(--muted);margin-top:auto;margin-bottom:17px}.lesson .buttons{margin-top:12px}.lesson .buttons button{flex:1}.state{font-size:11px;letter-spacing:.05em;color:var(--accent);font-weight:600}.lesson .score{font-size:12px;color:var(--muted)}#empty{text-align:center;border:1px dashed #c5d2da;border-radius:12px;padding:90px 20px;background:white}#empty h2{font-size:19px;font-weight:500;color:var(--muted)}dialog{width:min(620px,94vw);max-height:90vh;overflow:auto;border:1px solid var(--line);border-radius:14px;background:white;padding:28px;color:var(--ink);box-shadow:0 15px 50px #15263428}dialog::backdrop{background:#172c4099;backdrop-filter:blur(3px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}.dialog-heading h2{margin:0}.dialog-heading button{border:0;padding:4px 10px}.hint{font-size:13px;color:var(--muted);margin-top:16px}.file-row{padding:10px 0;border-top:1px solid var(--line);overflow-wrap:anywhere;font-size:12px}.file-row .ok{color:var(--accent);font-weight:600}.file-row .missing{color:#9b491d;font-weight:600}.mapping{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}.mapping button{min-width:95px;font-size:12px}.player-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;background:white}.player-top>span{font-size:13px}#lessonName{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;max-width:60%}.progress{height:4px;background:#dce7e1}.progress i{display:block;height:100%;background:var(--accent);transition:width .25s}.study-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(330px,1fr);align-items:center;gap:42px;max-width:1500px;margin:auto;min-height:calc(100vh - 195px);padding:36px}.study-layout.text-only{display:block;max-width:900px;padding:70px 40px}.study-layout.text-only #study{background:white;border:1px solid var(--line);border-radius:14px;padding:40px}#video{display:block;width:100%;max-height:60vh;background:#17232d;border-radius:10px}#caption{font-size:21px;text-align:center;min-height:40px;white-space:pre-wrap;margin:15px 0;color:var(--ink)}#clipInfo{font-size:12px;color:var(--muted);margin:0}#mediaError{border:1px solid #e8c5ac;background:#fff7ee;border-radius:10px;padding:28px}#mediaError p{overflow-wrap:anywhere}#mediaError button{margin-right:8px}.category{color:var(--accent);font-weight:600;font-size:12px;margin-bottom:12px}#pageTitle{font-size:clamp(25px,2.6vw,38px);margin:0 0 25px}#text{font-size:24px;white-space:pre-wrap;color:#214f43;line-height:1.8}#translation{font-size:19px;white-space:pre-wrap}#notes{white-space:pre-wrap;font-size:15px;border-left:3px solid #b4cbbf;padding-left:18px;color:var(--muted);margin-top:22px}#notes:empty{display:none}#quiz button{width:100%;display:block;text-align:left;margin:10px 0;white-space:normal;padding:14px 16px}#quiz button.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}#quiz button.correct{background:#e6f3eb;border-color:var(--accent)}#quiz button.wrong{background:#fff0e9;border-color:#b85d35}#quiz button:disabled{opacity:1}#quiz input{width:100%;padding:12px;border:1px solid var(--line);border-radius:7px}#feedback{font-size:16px;margin-top:20px;font-weight:600;white-space:pre-wrap}.correct{color:#176350}.wrong{color:#9d4625}footer{position:sticky;bottom:0;display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:12px;padding:16px;background:#ffffffee;border-top:1px solid var(--line);backdrop-filter:blur(8px)}footer label{font-size:13px;display:flex;align-items:center;gap:8px}footer input{accent-color:var(--accent)}footer select{padding:7px;border:1px solid var(--line);border-radius:6px;background:white}#timer{font-size:12px;color:var(--muted);min-width:85px}#padStatus{text-align:center;font-size:11px;color:var(--muted);padding:6px;margin:0}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#1c3330;color:white;padding:12px 20px;border-radius:8px;max-width:90vw;z-index:10;display:none}.result-number{font-size:48px;font-weight:600;color:var(--accent);margin-bottom:10px}.result-item{padding:10px 0;border-top:1px solid var(--line)}#resultBody{margin-bottom:24px}[hidden]{display:none!important}@media(max-width:1000px){#lessons{grid-template-columns:repeat(2,minmax(0,1fr))}.study-layout{gap:26px;padding:28px}.study-layout.text-only{padding:35px 25px}}@media(max-width:700px){#header{padding:14px 18px;align-items:flex-start}.brand{font-size:16px;white-space:nowrap}nav{gap:6px;justify-content:flex-end}nav button{font-size:12px;padding:6px 9px}.heading{display:block}#search{width:100%;margin-top:20px}#library{padding:25px 18px}#lessons{grid-template-columns:1fr}.lesson{min-height:185px;padding:20px}#empty{padding:65px 16px}.study-layout{grid-template-columns:1fr;padding:20px;gap:25px;min-height:0}.study-layout.text-only{padding:25px 18px}.study-layout.text-only #study{padding:24px}#pageTitle{font-size:26px}#text{font-size:21px}#translation{font-size:17px}.player-top{padding:12px;gap:10px}.player-top button{font-size:11px;padding:7px}#lessonName{max-width:40%}footer{gap:8px;padding:10px}footer button{font-size:12px;padding:8px}#timer{min-width:75px}#video{max-height:45vh}dialog{padding:22px}}

#text ruby{ruby-position:over;ruby-align:center}#text rt{font-size:.52em;line-height:1.3;color:#526f65;font-weight:400}#text:has(ruby){line-height:2.8;overflow-wrap:anywhere}

#text:has(ruby){overflow-wrap:normal;overflow-x:auto}#text .word{display:inline-block;white-space:nowrap;overflow-wrap:normal;vertical-align:baseline}#posLegend{display:flex;flex-wrap:wrap;gap:3px 12px;font-size:12px;line-height:1.5}#posLegend[hidden]{display:none}#posLegend span:before{content:"● ";font-size:.8em}.pos-noun{color:#174d88}.pos-verb{color:#a13c20}.pos-adjective{color:#65459b}.pos-pronoun{color:#8a3860}.pos-adverb{color:#805009}.pos-function{color:#426b31}.pos-number{color:#77531a}.pos-proper{color:#455985}.pos-expression{color:#146b6b}.pos-conjunction{color:#426b31}.pos-preposition{color:#315e42}.pos-determiner{color:#794363}.pos-particle{color:#486432}.pos-interjection{color:#146b6b}.pos-numeral{color:#77531a}.pos-auxiliary{color:#873d32}.pos-other{color:#52616b}

.playback-setting{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:8px 0;border-bottom:1px solid var(--line)}.playback-setting select{font:inherit;padding:5px 8px;border:1px solid var(--line);border-radius:6px;background:#fff}.player-top{flex-wrap:wrap}

#text .word.bilingual{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;line-height:1.3;margin-top:.6em;margin-bottom:.4em}#text .gloss-en{font-size:.52em;line-height:1.3;font-weight:400;color:#526f65}

.gloss-settings{display:flex;flex-wrap:wrap;gap:12px 24px}.gloss-settings label{display:flex;align-items:center;gap:6px}.gloss-settings input{accent-color:var(--accent)}