@font-face{font-family:'Noto Serif CJK JP';src:url('./fonts--noto-serif-cjk-jp-full.woff') format('woff');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:'Noto Serif CJK JP';src:url('./fonts--noto-serif-cjk-jp-core.woff') 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:root{--blue:#3388bb;--sky:#8ac6e3;--deep:#123e57;--ink:#183e54;--muted:#637d8c;--line:#d3e2e9;--paper:#fcfdfd;--egg:#f5f1e7;--serif:'Noto Serif CJK JP','Noto Serif JP',serif;--sans:var(--serif);--green:#2a715d;--red:#a64f42;--mono:var(--serif)}
*{box-sizing:border-box}
html{scroll-behavior:auto;text-size-adjust:100%;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-weight:400;-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
button:disabled{cursor:default}
button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}
button{color:inherit}
button:focus-visible,a:focus-visible{outline:2px solid var(--blue);outline-offset:5px}
::selection{background:#d5eaf5;color:#123e57}
.site-header{position:relative;isolation:isolate;overflow:hidden;background:var(--deep);color:var(--egg)}



.masthead{width:min(1120px,calc(100% - 112px));margin:auto;min-height:170px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.site-logo{border:0;background:none;padding:0;color:var(--egg);font-family:var(--serif);font-weight:400;font-size:clamp(2.8rem,6.8vw,4.75rem);letter-spacing:-.055em;line-height:1.4;text-decoration:none}
.site-logo:focus-visible{outline-color:var(--sky)}

.nav-line{border-top:1px solid #b6dbea35}
.site-nav{width:min(1120px,calc(100% - 112px));margin:auto;display:flex;align-items:center;gap:36px;min-height:62px}
.nav-button{position:relative;display:flex;align-items:center;gap:10px;padding:20px 0;border:0;background:none;color:#d4e5ed;font-family:var(--serif);font-size:.9rem;font-weight:400;letter-spacing:.08em;white-space:nowrap}
.nav-button small{font-size:.75rem;letter-spacing:.035em;opacity:.68}
.nav-button.active{color:#fff}
.nav-button.active:after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--sky)}
.nav-button:hover{color:#fff}
.nav-button:focus-visible{outline-color:var(--sky)}
.nav-add{margin-left:auto;gap:9px;letter-spacing:.025em}
.plus{font-size:1.25rem;font-weight:200}
.breadcrumb{width:min(1120px,calc(100% - 112px));min-height:62px;margin:auto;display:flex;align-items:center;gap:13px;font-size:.75rem;color:var(--muted);white-space:nowrap;overflow:hidden}
.breadcrumb .current-crumb{overflow:hidden;text-overflow:ellipsis;min-width:0}
.crumb-divider{color:#96b7c9}
.crumb-button{border:0;padding:8px 0;background:none;white-space:nowrap;color:var(--muted);font-size:inherit}
.crumb-button:hover{color:var(--blue)}
.site-main{width:min(1120px,calc(100% - 112px));margin:45px auto 100px}
.page-heading{display:flex;align-items:baseline;justify-content:space-between;gap:20px;padding-bottom:28px;border-bottom:1px solid var(--blue);margin:0}
.page-heading h1{font-family:var(--serif);font-size:2rem;font-weight:400;letter-spacing:.08em;margin:0}
.page-heading span{font-family:var(--serif);font-size:.95rem;color:var(--muted);font-weight:400}
.category-list{display:flex;flex-direction:column}
.category-item{display:grid;grid-template-columns:74px 1fr 1fr 22px;align-items:center;gap:18px;min-height:90px;padding:19px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;transition:background .18s,color .18s}
.category-index,.list-index{font-family:var(--mono);font-size:.75rem;color:var(--blue);font-weight:400}
.category-name{font-family:var(--serif);font-size:1.35rem;font-weight:400;letter-spacing:.06em}
.category-en{font-family:var(--serif);font-size:1rem;font-weight:400;color:var(--muted)}
.row-arrow{width:18px;height:18px;stroke:currentColor;stroke-width:1;fill:none;color:var(--blue);transition:transform .18s}
.category-item:hover,.minimal-list-item:hover{background:#3388bb04;color:var(--blue)}
.category-item:hover .row-arrow,.minimal-list-item:hover .row-arrow{transform:translateX(3px)}
.minimal-list-item{width:100%;display:grid;grid-template-columns:74px minmax(0,1fr) 22px;align-items:center;gap:18px;min-height:122px;border:0;border-bottom:1px solid var(--line);background:none;padding:25px 0;text-align:left}
.list-title{font-family:var(--serif);font-size:clamp(1.25rem,2.1vw,1.65rem);line-height:1.65;font-weight:400;max-width:800px;overflow-wrap:anywhere}
.empty-category{padding:72px 0;color:var(--muted);font-size:.95rem}
.empty-add{display:block;border:0;background:none;margin:60px auto;color:var(--blue);font-size:1rem;padding:14px}
.reader-document{width:min(820px,calc(100% - 112px));margin:38px auto 110px}
.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:30px}
.article-kind{color:var(--muted);font-size:.75rem;letter-spacing:.08em}
.reader-actions{display:flex;align-items:center;gap:23px;flex-shrink:0}
.reader-actions button{padding:8px 0;border:0;background:none;color:var(--muted);font-size:.875rem}
.reader-actions button:hover{color:var(--blue)}
.reader-actions button[data-action='delete']:hover{color:var(--red)}
.reader-article h1{margin:0;max-width:800px;font-family:var(--serif);font-size:clamp(2rem,4.1vw,3.1rem);font-weight:400;line-height:1.5;letter-spacing:-.035em;color:var(--deep);overflow-wrap:anywhere}
.reader-rule{height:1px;width:64px;background:var(--blue);margin:38px 0 46px}
.reader-copy{font-family:var(--serif);font-size:1.1875rem;font-weight:400;line-height:2.1;color:#244b60;overflow-wrap:break-word}
.reader-copy p{white-space:pre-wrap;margin:0 0 1.6em}
.reader-copy p:last-child{margin-bottom:0}
.inline-answer{display:inline-flex;align-items:baseline;gap:5px;max-width:100%;vertical-align:baseline;white-space:nowrap;margin:0 3px;line-height:1.6}
.blank-number{font-family:var(--sans);font-weight:400;font-size:.65em;line-height:1;color:var(--blue);position:relative;top:-.5em}
.inline-answer-input{display:inline-block;box-sizing:content-box;width:var(--answer-width,7ch);min-width:5ch;max-width:min(23ch,calc(100vw - 110px));height:1.55em;padding:.08em .45em .15em;border:1px solid #a9c9da;border-bottom-color:var(--blue);border-radius:2px;background:#edf5f94d;color:var(--deep);font-family:var(--serif);font-size:1em;font-weight:400;line-height:1.55;vertical-align:baseline;outline:none;transition:border-color .15s,box-shadow .15s,background .15s}
.inline-answer-input:hover{border-color:var(--blue)}
.inline-answer-input:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px #3388bb15}
.inline-answer.is-correct .inline-answer-input{color:var(--green);border-color:#73a193;background:#f0f7f3}
.inline-answer.is-wrong .inline-answer-input{color:var(--red);border-color:#c69086;background:#fdf5f2}
.inline-answer-input[readonly]{cursor:text}
.inline-answer-mark{font-family:var(--sans);font-size:.7em;color:var(--green)}
.inline-correction{font-family:var(--sans);font-size:.72em;line-height:1.5;color:var(--red);white-space:normal}
.questions-section{border-top:1px solid var(--line);padding-top:54px;margin-top:58px}
.questions-heading{font-family:var(--serif);font-size:1.375rem;letter-spacing:.07em;font-weight:400;margin:0 0 42px;color:var(--deep)}
.question-block{border-bottom:1px solid var(--line);margin-bottom:42px;padding-bottom:42px}
.question-number{font-family:var(--mono);font-size:.75rem;color:var(--blue);letter-spacing:.04em;margin-bottom:14px}
.question-block h2,.sentence-question{font-family:var(--serif);font-size:1.125rem;font-weight:400;line-height:1.95;margin:0 0 24px;color:var(--ink);white-space:pre-wrap}
.sentence-question{margin-bottom:0}
.answer-list{display:flex;flex-direction:column;gap:6px}
.answer-row{position:relative;display:flex;align-items:baseline;gap:14px;min-height:52px;padding:12px 15px;border:1px solid transparent;border-radius:2px;font-family:var(--serif);font-size:1rem;font-weight:400;line-height:1.7;cursor:pointer}
.answer-row:hover{background:#f0f6f9}
.answer-row:focus-within{outline:2px solid var(--blue);outline-offset:2px}
.answer-row.selected{background:#edf5f9;border-color:#c0d9e7}
.answer-radio{position:absolute;opacity:0;width:1px;height:1px}
.answer-letter{font-family:var(--sans);font-size:.8rem;line-height:1.6;color:var(--muted);flex:0 0 14px}
.answer-row.selected .answer-letter{color:var(--blue)}
.answer-text{flex:1;min-width:0}
.answer-mark{color:var(--green);font-family:var(--sans);font-size:.875rem}
.answer-row.correct-option{border-color:#a8cabd;background:#f1f7f4;color:var(--green)}
.answer-row.wrong-option{border-color:#dec1bb;background:#fcf5f3;color:var(--red)}
.answer-row:has(input:disabled){cursor:default}
.inline-feedback{font-size:.875rem;line-height:1.8;margin-top:18px;color:var(--muted)}
.inline-feedback.wrong{color:var(--red)}
.inline-feedback.correct{color:var(--green)}
.check-zone{display:flex;flex-direction:column;align-items:flex-start;gap:20px;margin-top:50px}
.check-all-button{border:1px solid var(--blue);border-radius:2px;background:var(--blue);color:#fff;min-height:48px;padding:12px 30px;letter-spacing:.05em;font-size:.9375rem;font-weight:400}
.check-all-button:hover:not(:disabled){background:#2777a7;border-color:#2777a7}
.check-all-button:disabled{background:#dbe6ec;border-color:#dbe6ec;color:#68818f}
.result-line{font-family:var(--serif);font-size:1.5rem;color:var(--deep)}
.result-line small{font-family:var(--sans);font-size:.875rem;color:var(--muted);margin-left:12px}
.reset-link{border:0;border-bottom:1px solid var(--line);background:none;color:var(--blue);padding:0 0 5px;font-size:.875rem}
.modal-backdrop{position:fixed;inset:0;z-index:50;background:#123e5761;display:flex;align-items:center;justify-content:center;padding:24px;backdrop-filter:blur(4px)}
.modal{position:relative;width:min(780px,100%);max-height:90dvh;overflow:auto;overscroll-behavior:contain;background:var(--paper);border:1px solid var(--line);border-radius:3px;padding:38px}
.modal h2{margin:0 0 14px;font-family:var(--serif);font-weight:400;font-size:1.6rem;color:var(--deep)}
.modal-note{font-size:.875rem;color:var(--muted);line-height:1.7;margin:0 0 23px}
.icon-button{border:0;background:none;color:var(--muted);display:flex;align-items:center;justify-content:center;width:36px;height:36px;font-size:1.5rem}
.close{position:absolute;right:18px;top:18px}
.tabs{display:flex;gap:25px;border-bottom:1px solid var(--line);margin:0 0 25px}
.tab{border:0;background:none;color:var(--muted);padding:12px 0;font-size:.9375rem}
.tab.active{color:var(--blue);border-bottom:1px solid var(--blue)}
.form-grid{display:flex;flex-direction:column;gap:21px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label.field{display:flex;flex-direction:column;gap:9px;font-size:.875rem;line-height:1.6;color:var(--muted)}
.field input,.field textarea,.field select{width:100%;border:1px solid #c5d7e1;border-radius:2px;padding:11px 12px;background:#fff;color:var(--ink);outline:none;font-size:1rem}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 2px #3388bb12}
.field textarea{resize:vertical;line-height:1.7}
.question-editor{border-top:1px solid var(--line);padding:25px 0;margin-top:10px;display:flex;flex-direction:column;gap:15px}
.question-head{display:flex;align-items:center;justify-content:space-between;font-family:var(--mono);font-size:.75rem;color:var(--muted)}
.mini-button{border:0;background:none;color:var(--muted);font-family:var(--sans);font-size:.875rem}
.mini-button:hover{color:var(--red)}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 20px;border:1px solid var(--line);border-radius:2px;font-size:.9375rem}
.primary{background:var(--blue);border-color:var(--blue);color:#fff}
.secondary{background:var(--paper);color:var(--ink)}
.form-actions{position:sticky;bottom:-38px;display:flex;justify-content:flex-end;gap:12px;margin-top:28px;padding:20px 0 0;border-top:1px solid var(--line);background:var(--paper)}
.form-error{color:var(--red);font-size:.875rem;line-height:1.6;margin-bottom:12px}
.form-error:empty{display:none}
.import-note{font-size:.875rem;line-height:1.8;color:var(--muted)}
.file-row{display:flex;align-items:center;flex-wrap:wrap;gap:16px;font-size:.875rem}
.file-row input{max-width:100%}
.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,8px);z-index:80;background:var(--deep);color:var(--egg);padding:12px 21px;border-radius:2px;font-size:.875rem;pointer-events:none;opacity:0;transition:.2s;max-width:calc(100% - 40px)}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:1600px){.masthead{min-height:190px}.site-main{margin-top:54px}}
@media(max-width:760px){.masthead,.site-nav,.breadcrumb,.site-main{width:calc(100% - 48px)}.masthead{min-height:130px}.site-logo{font-size:3.4rem}.site-nav{gap:26px;min-height:57px}.nav-button{padding:19px 0;font-size:.875rem}.nav-button small{display:none}.breadcrumb{min-height:56px;gap:10px}.site-main{margin-top:27px;margin-bottom:70px}.page-heading{padding-bottom:23px}.page-heading h1{font-size:1.65rem}.page-heading span{font-size:.825rem}.category-item{grid-template-columns:32px minmax(0,1fr) minmax(0,1fr) 16px;gap:12px;min-height:88px}.category-name{font-size:1.12rem;letter-spacing:.025em}.category-en{font-size:.85rem}.minimal-list-item{grid-template-columns:30px minmax(0,1fr) 18px;gap:12px;min-height:110px;padding:25px 0}.list-title{font-size:1.2rem;line-height:1.65}.reader-document{width:calc(100% - 48px);margin-top:24px}.reader-toolbar{margin-bottom:24px}.reader-actions{gap:20px}.reader-article h1{font-size:2rem;line-height:1.55;letter-spacing:-.025em}.reader-rule{margin:29px 0 33px;width:48px}.reader-copy{font-size:1.0625rem;line-height:2.05}.reader-copy p{margin-bottom:1.75em}.questions-section{margin-top:45px;padding-top:35px}.questions-heading{font-size:1.25rem;margin-bottom:28px}.question-block h2,.sentence-question{font-size:1.0625rem}.answer-row{font-size:1rem;padding:11px 10px;gap:10px}.question-block{padding-bottom:29px;margin-bottom:30px}.inline-answer{gap:3px;margin:0 1px}.inline-answer-input{padding-left:.32em;padding-right:.32em}.modal-backdrop{padding:12px}.modal{padding:24px 20px;max-height:92dvh}.modal h2{font-size:1.4rem;padding-right:22px}.close{right:10px;top:12px}.two{grid-template-columns:1fr}.form-actions{bottom:-24px}.check-zone{margin-top:35px}.nav-add{font-size:.8125rem}}
@media(max-width:360px){.masthead,.site-nav,.breadcrumb,.site-main,.reader-document{width:calc(100% - 36px)}.category-item{grid-template-columns:23px minmax(0,1fr) minmax(0,1fr) 14px;gap:8px}.category-en{font-size:.75rem}.category-name{font-size:1rem}.site-logo{font-size:2.95rem}.nav-button{font-size:.8rem}.site-nav{gap:22px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.breadcrumb,.reader-actions,.check-zone,.modal-backdrop,.toast{display:none}.reader-document{width:100%;margin:0}.reader-copy{font-size:12pt;color:#000}.reader-article h1{font-size:24pt}.question-block{break-inside:avoid}.inline-answer-input{border-color:#777;background:none}}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-nav,.page-heading,.reader-toolbar{flex-wrap:wrap}
.site-logo{max-width:100%;overflow-wrap:anywhere}

.category-en{overflow-wrap:anywhere}
@media(max-width:760px){.masthead{gap:16px}.site-logo{font-size:clamp(2rem,12vw,3.4rem)}.site-nav{column-gap:24px;row-gap:0}.page-heading{row-gap:12px}}

.paper-copy{font-family:var(--serif);font-size:17px;line-height:2}.paper-copy>p{margin:0 0 1.3em}.paper-copy h2{font-size:24px;font-weight:400;line-height:1.6;margin:2.8em 0 1em}.paper-copy h3{font-size:20px;font-weight:400;line-height:1.6;margin:2em 0 1em}.paper-byline{margin:28px 0 48px;color:var(--muted);font-size:14px;line-height:1.8}.paper-byline p{margin:4px 0}.paper-abstract{border-bottom:1px solid var(--line);padding-bottom:30px}.paper-abstract h2{margin-top:0}.paper-keywords{font-size:14px;color:var(--muted)}.paper-copy blockquote{margin:1.6em 0;padding-left:24px;border-left:1px solid var(--sky);color:var(--muted)}.paper-table-wrap{overflow-x:auto;margin:32px 0}.paper-copy table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.8}.paper-copy th,.paper-copy td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.paper-copy th{font-weight:400;border-top:1px solid var(--blue)}.paper-copy caption{text-align:left;margin-bottom:14px}.paper-footnotes{border-top:1px solid var(--line);margin-top:48px;font-size:14px}.paper-footnotes li{margin:16px 0;scroll-margin-top:24px}.paper-copy sup{font-size:.65em;line-height:0}.paper-copy sup a{color:var(--blue);text-decoration:none}@media(max-width:700px){.paper-copy{font-size:16px}.paper-copy h2{font-size:22px}.paper-copy h3{font-size:19px}}

.grammar-instruction{font-family:var(--serif);font-size:14px;line-height:1.8;color:var(--muted);margin:20px 0 0}.grammar-error-option{display:inline;background:#edf0f2;color:var(--ink);border:1px solid #dce2e5;border-radius:3px;padding:3px 5px;margin:0 2px;box-decoration-break:clone;-webkit-box-decoration-break:clone;cursor:pointer;transition:background .15s,border-color .15s;color:inherit}.grammar-error-copy{line-height:2.5}.grammar-error-option:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.grammar-error-option.is-selected{background:#d4e9f5;border-color:var(--blue);color:#154f71}.grammar-error-option.is-correct{background:#dceee3;border-color:var(--green);color:#205943}.grammar-error-option.is-wrong{background:#f4dfdc;border-color:var(--red);color:#883d32}.grammar-error-option[aria-disabled=true]{cursor:default}.grammar-error-number{font-size:.7em;vertical-align:super;padding-right:5px;line-height:0;color:var(--muted)}.grammar-result{font-size:14px;line-height:1.8;color:var(--ink)}.grammar-result p{margin:0 0 8px}

.article-source{text-align:right;margin:32px 0 0;padding-top:18px;font-family:var(--serif);font-size:14px;font-style:italic;font-weight:400;line-height:1.8;color:#7e878d;overflow-wrap:anywhere}.article-source cite{font-style:inherit}.article-source a{color:inherit;text-decoration:underline;text-underline-offset:3px}