:root{--paper:#fffbf0;--surface:#fff;--ink:#2b2a26;--muted:#6b675d;--line:#e6e0d0;--accent:#2c4a7c;--accent-ink:#1f3354;--accent-soft:#fdf0c4;--egg:#fcd575;--good:#1d8770;--good-soft:#e2f2ea;--warm:#a8672f;--dash:#d8d0bc;--serif:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP",serif;--sans:"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;--mono:ui-monospace,"SF Mono",Menlo,monospace}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);line-height:1.8;-webkit-text-size-adjust:100%}a{color:var(--accent);text-underline-offset:.2em}a:hover{color:var(--accent-ink)}button{font:inherit}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.num{font-family:var(--mono);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.breadcrumbs,.muted{color:var(--muted);font-size:13px}.breadcrumbs a{color:var(--muted)}.site-header{position:relative;z-index:20;background:var(--egg);border-bottom:1px solid #e9c25a}.site-header-inner{max-width:1000px;margin:auto;height:56px;padding:0 16px;justify-content:space-between;gap:16px}.brand,.site-header-inner{display:flex;align-items:center}.brand{gap:8px;font-family:var(--serif);font-size:20px;font-weight:700;text-decoration:none;letter-spacing:.04em}.brand,.brand:hover{color:var(--ink)}.brand-mark{width:36px;height:36px;flex:none;border-radius:50%;background:var(--surface)}.site-nav{display:flex;gap:4px;font-size:14px}.site-nav a{padding:8px 10px;border-radius:8px;color:var(--ink);text-decoration:none}.site-nav a:hover{background:rgba(255,255,255,.55);color:var(--ink)}.site-main{max-width:1000px;margin:0 auto;padding:16px 16px 72px;min-height:70vh}.site-main:has(>.mdb){max-width:none;padding:0}.site-main:has(>.mdb)~.site-footer{padding-bottom:96px}.site-footer{max-width:1000px;margin:auto;padding:24px 16px 40px;display:flex;gap:8px 16px;flex-wrap:wrap;border-top:1px solid var(--line);font-size:13px}.site-footer,.site-footer a{color:var(--muted)}h1,h2,h3{line-height:1.45;overflow-wrap:anywhere;text-wrap:balance}h1{font-size:clamp(22px,4vw,32px);margin:8px 0 12px}h2{font-size:18px;margin:32px 0 12px}h3{font-size:16px;margin:24px 0 10px}.section{margin-top:28px}.band{margin:28px -16px 0;padding:20px 16px;background:var(--surface);border-block:1px solid var(--line)}.band>h2:first-child,.section>h2:first-child{margin-top:0}.hero{padding:16px 0 8px;grid-template-columns:1fr auto;align-items:end}.hero,.hero-text{display:grid;gap:10px}.hero-guide{width:clamp(104px,26vw,176px);height:auto}.hero h1{font-family:var(--serif);font-size:clamp(26px,5vw,40px);margin:0}.hero p{margin:0;color:var(--muted);font-size:14px;max-width:40em}.entries{display:grid;gap:12px;margin-top:20px}@media(min-width:760px){.entries{grid-template-columns:repeat(3,minmax(0,1fr))}}.entry{display:grid;gap:4px;padding:18px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);text-decoration:none}.entry:hover{border-color:var(--accent)}.entry small{font-size:12px;font-weight:700;letter-spacing:.06em}.entry strong{font-size:19px}.entry span{font-size:13px;color:var(--muted)}.entry.primary{background:var(--accent);border-color:var(--accent);color:#fff}.entry.primary span{color:#fff;opacity:.9}.entry.for-parents small{color:var(--warm)}.entry.for-students small{color:var(--good)}.tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}@media(min-width:760px){.tiles{grid-template-columns:repeat(3,minmax(0,1fr))}}.tiles a{padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);font-size:14px;font-weight:700;color:var(--ink);text-decoration:none}.tiles a:hover{border-color:var(--accent)}.link-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.link-list a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);text-decoration:none;font-weight:700}.link-list small{display:block;font-weight:400;color:var(--muted);font-size:12px}.search{display:grid;gap:6px;position:relative}.search-label{font-size:12px;font-weight:700;color:var(--muted)}.search-field{display:flex;align-items:center;gap:8px;height:52px;padding:0 14px;background:var(--surface);border:2px solid var(--accent);border-radius:10px;color:var(--muted)}.search-field input{flex:1 1;min-width:0;border:0;outline:0;font:inherit;font-size:16px;background:transparent;color:var(--ink)}.search-field:focus-within{box-shadow:0 0 0 3px var(--accent-soft)}.search-results{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:10px;background:var(--surface);overflow:hidden}.search-results li+li{border-top:1px solid var(--line)}.search-results a,.search-results button{display:flex;width:100%;justify-content:space-between;align-items:baseline;gap:12px;padding:12px 14px;border:0;background:none;text-align:left;color:var(--ink);text-decoration:none;font-weight:700;cursor:pointer}.search-results a:hover,.search-results button:hover{background:var(--accent-soft)}.search-results small{font-weight:400;color:var(--muted);font-size:12px;white-space:nowrap}.search-empty{padding:12px 14px;color:var(--muted);font-size:14px}.year-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:8px}.year-grid a{display:grid;justify-items:center;gap:0;padding:10px 4px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);text-decoration:none}.year-grid a:hover{border-color:var(--accent);background:var(--accent-soft)}.year-grid b{font-family:"Fraunces",var(--mono);font-weight:600;font-size:17px}.year-grid small{font-size:11px;color:var(--muted);text-align:center;line-height:1.4}.directory{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}.directory a{padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);text-decoration:none;font-size:14px}.directory small{display:block;color:var(--muted);font-size:11px}.notice{font-size:13px;color:var(--muted);background:var(--accent-soft);border-radius:8px;padding:10px 14px}.ad-slot{display:grid;gap:2px;padding:14px;border:1px dashed var(--dash);border-radius:10px;color:var(--ink)}.ad-slot small{font-size:11px;color:var(--muted)}.ad-slot span{font-size:13px;color:var(--muted)}.article-body{overflow-wrap:anywhere}.article-body table{border-collapse:collapse;font-size:14px;width:100%}.article-body td,.article-body th{padding:8px 10px;border:1px solid var(--line);text-align:left;vertical-align:top}.article-body th{background:var(--accent-soft)}.article-body figure.wp-block-table,.reader-table-wrap{overflow-x:auto;margin:16px 0}.article-body img{max-width:100%;height:auto}.article-body :is(iframe,script){display:none}.article-body details{border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:12px 0;background:var(--surface)}.article-body summary{cursor:pointer;font-weight:700}.reader-hero{display:grid;gap:8px}.reader-eyebrow{margin:0;font-size:12px;color:var(--muted)}.reader-hero h1{font-family:var(--serif);margin:0}.reader-hero h1 span{display:block;font-size:.6em;color:var(--muted);font-family:var(--sans)}.reader-hero-promise,.reader-lead{margin:0;color:var(--muted);font-size:14px}.reader-hero-facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:0;margin:8px 0;border:1px solid var(--line);border-radius:12px;background:var(--surface);overflow:hidden}.reader-hero-facts>div{padding:12px 14px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.reader-hero-facts dt{font-size:12px;color:var(--muted)}.reader-hero-facts dd{margin:0;font-family:var(--mono);font-size:16px}.reader-hero-value-line{display:block}.reader-primary-cta{justify-self:start;padding:10px 14px;border:1px solid var(--accent);border-radius:8px;text-decoration:none;font-weight:700;font-size:14px}.reader-updated-at{margin:0;font-size:12px;color:var(--muted)}.reader-math-after-scores,.reader-math-feature{display:none}.reader-section-nav{margin:16px 0;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.reader-section-nav h2{margin:0 0 6px;font-size:14px}.reader-section-nav ol{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:2px 12px;font-size:14px}.reader-section-nav span{font-family:var(--mono);color:var(--muted);margin-right:6px}.reader-section{scroll-margin-top:72px}.reader-section-source{margin-left:8px;font-size:12px;font-weight:400}.reader-table caption{text-align:left;font-size:12px;color:var(--muted);padding-bottom:4px}.reader-mobile-detail,.reader-mobile-tables{display:none}@media(max-width:700px){.reader-desktop-detail,.reader-desktop-table{display:none}.reader-mobile-detail,.reader-mobile-tables{display:block}}.uni-math{margin:16px 0;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);display:grid;gap:10px}.uni-math h2{margin:0;font-size:16px;display:flex;justify-content:space-between;align-items:baseline;gap:8px}.uni-math h2 small{font-weight:400;font-size:12px;color:var(--muted)}@media(min-width:760px){.site-main{padding-top:28px}.band{margin-inline:0;border:1px solid var(--line);border-radius:12px}}@media(max-width:640px){.site-header-inner{height:auto;flex-wrap:wrap;gap:0;padding:8px 12px 6px}.site-nav{width:100%;display:grid;grid-template-columns:repeat(3,1fr);gap:4px;margin-top:6px}.site-nav a{padding:7px 2px;text-align:center;font-size:13px;font-weight:700;background:rgba(255,255,255,.45)}}.uni-jump{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px;margin:4px 0}.uni-jump a{display:flex;justify-content:center;align-items:center;min-height:48px;padding:8px 10px;border:1px solid var(--accent);border-radius:10px;background:var(--surface);color:var(--accent);font-weight:700;font-size:14px;text-decoration:none;text-align:center}.uni-jump a:hover{background:var(--accent-soft)}.spec h1{margin-top:12px}.spec h2{margin-top:36px;padding-top:12px;border-top:1px solid var(--line)}.spec h3{margin-top:24px}.spec .spec-table{overflow-x:auto;margin:12px 0}.spec table{min-width:520px}.spec code{font-family:var(--mono);font-size:.88em;background:var(--accent-soft);padding:1px 5px;border-radius:4px;overflow-wrap:anywhere}.spec ol,.spec ul{padding-left:1.4em}.page-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:12px}.page-intro .guide{flex:none;width:clamp(72px,18vw,96px);height:auto}.page-guide{display:block;margin:4px 0 12px;width:clamp(88px,22vw,120px);height:auto}.page-duo{margin:4px 0 16px;width:min(100%,320px)}.page-duo img{display:block;width:100%;height:auto}.page-duo figcaption{margin-top:4px;font-size:12px;color:var(--muted)}.not-found{display:grid;justify-items:start;gap:8px;padding:24px 0}.hero-eyebrow{margin:0;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--warm)}.popular{margin-top:16px}.popular h2{margin:0 0 8px;font-size:13px;color:var(--muted)}.popular .tiles a{text-align:center}.more-link{margin:12px 0 0;font-size:14px;font-weight:700}.article-rows{list-style:none;margin:0;padding:0;display:grid;gap:8px}.article-rows a{display:grid;gap:2px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);text-decoration:none}.article-rows a:hover{border-color:var(--accent)}.article-rows strong{font-size:15px;line-height:1.6}.article-rows small{font-size:12px;color:var(--muted);line-height:1.6}.stage-cards{display:grid;gap:12px;margin-top:12px}@media(min-width:760px){.stage-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}.stage-card{display:grid;gap:8px;align-content:start;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.stage-card p{margin:0;font-size:13px;color:var(--muted)}.stage-card ul{margin:0;padding:0;list-style:none;display:grid;gap:2px}.stage-card li a{display:block;padding:6px 0;font-size:14px;border-top:1px dashed var(--line)}.stage-card-head{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none}.stage-card-head small{display:block;font-size:12px;color:var(--muted)}.stage-card-head strong{font-size:18px}.stage-no{flex:none;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--egg);font-family:var(--mono);font-weight:700}.stage-more{font-size:13px;font-weight:700}.stage-chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 4px}.stage-chips a{padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);text-decoration:none;font-size:14px;font-weight:700}.stage-chips a:hover,.stage-chips a[aria-current=page]{border-color:var(--accent);background:var(--accent-soft)}.stage-section{scroll-margin-top:16px;margin-top:28px;padding-top:8px;border-top:1px solid var(--line)}.stage-section>h2{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin:12px 0 4px}.stage-section>h2 a{color:var(--ink);text-decoration:none}.stage-section>h2 small{font-size:12px;font-weight:400;color:var(--muted)}.stage-group h2,.stage-group h3{margin:20px 0 8px}.eyebrow-line{margin:8px 0 0;font-size:12px;font-weight:700;color:var(--warm)}.next-reads{margin-top:36px;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--accent-soft)}.next-reads h2{margin:0 0 10px;font-size:17px}.trust ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}@media(min-width:760px){.trust ul{grid-template-columns:repeat(3,minmax(0,1fr))}}.trust li{display:grid;gap:4px}.trust strong{font-size:15px}.trust span{font-size:13px;color:var(--muted)}.hm-talk{display:grid;grid-template-columns:48px minmax(0,1fr);gap:4px 10px;align-items:start;margin:16px 0}.hm-talk__who{grid-row:span 2;display:grid;justify-items:center;gap:2px}.hm-talk__who:before{content:"";width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:var(--surface) center/cover no-repeat}.hm-talk--left .hm-talk__who:before{background-image:url(/brand/character/face.webp);background-size:118%;background-position:50% 30%;background-color:var(--egg)}.hm-talk--right .hm-talk__who:before{background-image:url(/brand/character/souta-face.webp);background-size:112% auto;background-position:50% 12%;background-color:#fdf0c4}.hm-talk__name{font-size:10px;color:var(--muted);line-height:1.3;text-align:center}.hm-talk__text{position:relative;padding:10px 14px;border-radius:14px;background:var(--surface);border:1px solid var(--line);font-size:15px;line-height:1.75}.hm-talk--left .hm-talk__text{background:var(--accent-soft);border-color:#f3dd9b}.hm-talk--right{grid-template-columns:minmax(0,1fr) 48px}.hm-talk--right .hm-talk__who{grid-column:2;grid-row:1/span 2}.hm-talk--right .hm-talk__text{grid-column:1;grid-row:1}.hm-box{margin:20px 0;padding:14px 16px;border:2px solid var(--egg);border-radius:12px;background:var(--surface)}.hm-box .wp-block-group__inner-container>:last-child{margin-bottom:0}.hm-box__title{margin:0 0 6px;font-weight:700}.hm-box ul{margin:0;padding-left:1.2em}.art{max-width:720px;margin:0 auto}.art-head{margin:8px 0 20px}.art-stage{display:inline-block;margin-bottom:8px;padding:2px 10px;border-radius:999px;background:var(--egg);color:var(--ink);font-size:12px;font-weight:700;text-decoration:none}.art-head h1{margin:0 0 10px;font-size:clamp(22px,5.4vw,30px);line-height:1.5;letter-spacing:.01em}.art-meta{display:flex;flex-wrap:wrap;gap:4px 14px;margin:0;font-size:12px;color:var(--muted)}.art-body{font-size:16px;line-height:1.95;letter-spacing:.02em}@media(min-width:760px){.art-body{font-size:17px}}.art-body p{margin:0 0 .7em}.art-body strong{font-weight:700;background:linear-gradient(transparent 62%,#fde8a3 0);padding:0 1px}.art-body a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.22em}.art-body a.art-ext:after{content:"↗";display:inline-block;margin-left:2px;font-size:.8em;text-decoration:none}.art-h2{display:flex;align-items:flex-start;gap:12px;margin:3.2em 0 1em;padding:0 0 12px;border-bottom:2px solid var(--ink);font-size:clamp(19px,4.8vw,23px);line-height:1.5;scroll-margin-top:16px}.art-h2-no{flex:none;display:grid;place-items:center;min-width:42px;height:42px;padding:0 6px;border-radius:10px;background:var(--egg);font-family:var(--mono);font-size:16px;font-weight:700}.art-h2-summary .art-h2-no{font-family:var(--sans);font-size:13px}.art-h2-text{padding-top:4px}.art-h3{margin:2em 0 .7em;padding-left:12px;border-left:5px solid var(--egg);font-size:18px;line-height:1.55}.art-body ol,.art-body ul{margin:.4em 0 1.1em;padding:14px 16px 14px 2em;border-radius:10px;background:var(--surface);border:1px solid var(--line)}.art-body li{margin:.2em 0}.art-body li::marker{color:var(--warm);font-weight:700}.art-body blockquote{margin:1.2em 0;padding:12px 16px;border-left:4px solid var(--line);background:var(--surface);color:var(--muted)}.art-body figure.wp-block-table{margin:1.2em 0;border:1px solid var(--line);border-radius:10px;overflow-x:auto;background:var(--surface)}.art-body figure.wp-block-table table{border:0;min-width:100%;font-size:14px;line-height:1.7}.art-body figure.wp-block-table th{background:#fdf0c4;white-space:nowrap}.art-body figure.wp-block-table td,.art-body figure.wp-block-table th{border:0;border-bottom:1px solid var(--line);padding:10px 12px}.art-body figure.wp-block-table tr:last-child td{border-bottom:0}.art-body figure.wp-block-table tbody tr:nth-child(2n) td{background:#fffdf6}.art-body .hm-box{margin:1.4em 0;padding:16px 18px;border:2px solid var(--egg);border-radius:14px;background:#fffdf3}.art-body .hm-box__title{display:flex;align-items:center;gap:8px;margin:0 0 6px;font-size:15px}.art-body .hm-box__title:before{content:"✓";display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--egg);font-size:13px}.art-body .hm-box ul{margin:0;padding:0 0 0 1.3em;border:0;background:none}.art-toc{margin:1.4em 0 2em;padding:16px 18px;border-radius:14px;background:var(--surface);border:1px solid var(--line)}.art-toc-title{margin:0 0 6px!important;font-weight:700;font-size:15px}.art-toc ol{margin:0;padding:0 0 0 1.6em;border:0;background:none;counter-reset:none}.art-toc li{margin:.15em 0;font-size:15px;line-height:1.7}.art-toc li::marker{font-family:var(--mono);color:var(--muted);font-weight:400}.art-toc li.is-summary{list-style:none;margin-left:-1.6em}.art-toc li.is-summary:before{content:"まとめ｜";color:var(--muted)}.art-summary{margin:3em 0 1.5em;padding:4px 18px 14px;border-radius:14px;background:#fdf0c4}.art-summary .art-h2{margin-top:14px;border-bottom-color:rgba(0,0,0,.15)}.art-summary .art-h2-no{background:var(--surface)}.art-sources{margin:2em 0 1em;padding:14px 16px;border-top:1px solid var(--line);font-size:13px;line-height:1.8;color:var(--muted)}.art-sources-title{margin:0 0 4px!important;font-weight:700;color:var(--ink)}.art-sources ul{margin:0 0 6px;padding:0 0 0 1.2em;border:0;background:none}.art-sources p{margin:0}.art-top{margin:24px 0 0;text-align:right;font-size:13px}.art-body .hm-talk{margin:1.4em 0}.art-body p.art-cite{font-size:13px;line-height:1.7;color:var(--muted);margin-top:-.2em}.art-callout{margin:1.3em 0;padding:12px 16px 12px 18px;border-radius:12px;border-left:5px solid var(--egg);background:#fffbea}.art-callout p{margin:0}.art-callout-label{font-size:13px;font-weight:700;margin-bottom:2px!important}.art-callout-caution{border-left-color:#e08a5a;background:#fff3ec}.art-callout-caution .art-callout-label{color:#b4542a}.art-rail{display:none}@media(min-width:1280px){.site-main:has(>.art-layout){max-width:1320px}.art-layout{display:grid;grid-template-columns:200px minmax(0,720px) 240px;gap:44px;justify-content:center;align-items:start}.art-layout>.art{grid-column:2;max-width:none;margin:0}.art-rail{display:block;position:sticky;top:24px;max-height:calc(100vh - 48px);overflow-y:auto;padding-top:88px;font-size:13px;line-height:1.6}.art-rail-left{grid-column:1;grid-row:1}.art-rail-right{grid-column:3;grid-row:1}.art-body .art-toc{display:none}}.art-rail-title{margin:0 0 8px;font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.06em}.art-rail ol,.art-rail ul{list-style:none;margin:0;padding:0}.art-rail-toc li a{display:block;padding:5px 0 5px 12px;border-left:2px solid var(--line);color:var(--muted);text-decoration:none}.art-rail-toc li a:hover{color:var(--ink)}.art-rail-toc li a[aria-current]{border-left:3px solid var(--warm);padding-left:11px;color:var(--ink);font-weight:700}.art-rail-toc li.is-summary a:before{content:"まとめ｜"}.art-rail-side section+section{margin-top:28px}.art-rail-side li{border-top:1px solid var(--line)}.art-rail-side li:last-child{border-bottom:1px solid var(--line)}.art-rail-side li a{display:block;padding:9px 2px;color:var(--ink);text-decoration:none}.art-rail-side li a:hover{color:var(--accent);text-decoration:underline}.art-rail-more{display:inline-block;margin-top:8px;font-size:12px}.uni-legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;margin:0 0 10px;font-size:12px;color:var(--muted)}.uni-legend span{padding:2px 10px;border-radius:999px;font-weight:700;color:var(--ink)}.directory a.is-public,.search-results button.is-public,.uni-legend .is-public,.uni-list a.is-public{background:#eaf1fb;border-color:#c5d5ec}.directory a.is-private,.search-results button.is-private,.uni-legend .is-private,.uni-list a.is-private{background:#fdf1dc;border-color:#ecd2a2}.directory a.is-other,.search-results button.is-other,.uni-list a.is-other{background:#f1efe9}.uni-group+.uni-group{margin-top:22px}.uni-group-title{display:flex;align-items:baseline;gap:8px;margin:14px 0 8px;font-size:16px}.uni-group-title small{font-size:12px;color:var(--muted);font-weight:400}