:root{--bg:#f7f9fc;--surface:#fff;--surface-2:#edf3fa;--text:#182c43;--muted:#62758a;--line:#dfe7f0;--accent:#096acb;--accent-soft:#e4f1ff;--good:#258264;--bad:#bd514e;--code-bg:#edf3fa;--radius:16px;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--text);font-family:'Avenir Next','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;line-height:1.7;-webkit-text-size-adjust:100%}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #1685e9;outline-offset:4px}[hidden]{display:none!important}.wrap{max-width:1440px;margin:auto;padding:0 44px}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.site-header .wrap{display:flex;align-items:center;height:80px;gap:40px}.logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-size:17px;white-space:nowrap}.logo b{font-weight:750}.brand-mark{display:grid;place-items:center;background:#0876d9;color:#fff;font-size:31px;width:39px;height:42px;border-radius:10px 10px 3px 10px}.header-nav{display:flex;margin-left:auto;gap:30px;font-size:13px}.header-nav a{text-decoration:none;color:var(--muted);padding:28px 0}.header-nav a[aria-current]{color:var(--accent);box-shadow:0 2px var(--accent)}.header-search{max-width:220px}.header-search input{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:8px;padding:9px 12px;font-size:12px}.catalog-shell{display:grid;grid-template-columns:218px minmax(0,1fr);gap:40px}.catalog-sidebar{padding:36px 24px 20px 0;border-right:1px solid var(--line);position:sticky;top:80px;height:calc(100vh - 80px)}.sidebar-title{font-size:11px;color:var(--muted);margin:0 12px 18px;font-weight:600}.category-filter{border:0;background:none;width:100%;display:flex;align-items:center;gap:10px;text-align:left;padding:12px 10px;border-radius:8px;color:#50657b;font-size:12px;margin-bottom:5px;white-space:nowrap}.category-filter>span{font-size:20px;width:22px;text-align:center}.category-filter small{margin-left:auto;font-size:10px;color:#7b8fa3}.category-filter.active{background:var(--accent-soft);color:#0867bd;font-weight:700}.category-filter:hover{background:#eaf1f8}.sidebar-note{margin:40px 10px 22px;padding-top:24px;border-top:1px solid var(--line)}.note-symbol{display:block;color:var(--accent);font-size:24px;margin-bottom:10px}.sidebar-note strong{font-size:12px;line-height:1.9}.sidebar-note p{font-size:11px;color:var(--muted)}.sidebar-news{font-size:11px;margin-left:10px;color:var(--muted);text-decoration:none}.catalog-main{min-width:0;padding-top:32px}.hero{display:grid;grid-template-columns:1.12fr 1fr;min-height:300px;gap:20px;padding:30px 0 40px;align-items:center}.hero h1{font-size:clamp(30px,3.1vw,46px);line-height:1.48;letter-spacing:-1.3px;margin:0 0 16px;font-weight:800}.hero-copy>p{font-size:13px;color:var(--muted);line-height:2}.hero-link{font-size:12px;text-decoration:none;font-weight:700;display:inline-block;margin-top:15px}.hero-stage{position:relative;height:264px;border:1px solid #cfe2f7;border-radius:20px;background-color:#eaf5ff;background-image:radial-gradient(#bdd7ef 1px,transparent 1px);background-size:16px 16px;text-decoration:none;color:var(--text);overflow:hidden}.stage-label{position:absolute;top:20px;left:22px;font-size:11px;color:#527a9e}.stage-caption{position:absolute;bottom:18px;left:22px;right:22px;display:flex;justify-content:space-between;font-size:11px;font-weight:700}.stage-caption>span{font-weight:400;color:var(--accent)}.orbit{position:absolute;left:50%;top:49%;width:190px;height:160px;transform:translate(-50%,-50%)}.orbit-center,.orbit-item{position:absolute;display:grid;place-items:center;border-radius:16px;box-shadow:0 8px 20px #27679c14}.orbit-center{width:64px;height:64px;left:64px;top:65px;background:#0673d5;color:#fff;font-size:36px;transform:rotate(-8deg)}.orbit-item{width:43px;height:43px;font-size:22px;background:#fff;color:#1674c1;border:1px solid #d5e6f5}.orbit-a{left:0;top:62px;transform:rotate(-15deg)}.orbit-b{left:38px;top:4px;transform:rotate(-8deg)}.orbit-c{right:33px;top:0;transform:rotate(9deg)}.orbit-d{right:0;top:62px;transform:rotate(15deg)}.hero-stage:hover .orbit-center{transform:rotate(82deg);transition:transform .45s}.library{border-top:1px solid var(--line);padding-top:28px}.library-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}.library h2{font-size:21px;margin:0;letter-spacing:-.5px}.library-heading p{font-size:11px;color:var(--muted);margin:5px 0 20px}.secondary-button,.clear-button{border:1px solid var(--line);border-radius:7px;background:white;padding:7px 12px;font-size:11px;color:var(--muted);white-space:nowrap}.search-row{display:flex;gap:10px}.search-box{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid #ccdae8;border-radius:10px;padding:0 16px;flex:1;min-width:0}.search-box>span{font-size:27px;color:#64809a}.search-box input{background:none;border:0;width:100%;height:48px;font-size:12px;color:var(--text);outline:none}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px #096acb15}.search-box kbd{font-size:11px;border:1px solid var(--line);padding:0 6px;border-radius:4px;color:#91a0b1}.clear-button{background:transparent}.motion-filters{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin:17px 0 24px;font-size:11px}.motion-filters>span{color:var(--muted);margin-right:7px}.motion-filters button{font-size:11px;border:1px solid var(--line);background:#fff;color:#576e83;padding:5px 12px;border-radius:30px}.motion-filters button.active{color:#fff;background:var(--accent);border-color:var(--accent)}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:12px 0 32px}.card{min-width:0;background:white;border:1px solid var(--line);border-radius:13px;overflow:hidden}.card:hover{border-color:#98bddd}.card-preview-link{display:block;position:relative;background:#edf3f8;text-decoration:none;border-bottom:1px solid var(--line)}.card-media{display:flex;height:214px;align-items:center;justify-content:center;background:#eff4fa}.card:nth-child(4n+2) .card-media{background:#edf5f3}.card:nth-child(4n+3) .card-media{background:#f2eff9}.card:nth-child(4n+4) .card-media{background:#f8f2ec}.card-media video{display:block;height:186px;max-width:90%;object-fit:contain;border-radius:7px;border:1px solid #dfe5ec;background:white;box-shadow:0 4px 12px #25466610}.card-media-empty{color:var(--muted);font-size:12px}.preview-open{position:absolute;bottom:10px;right:10px;background:#ffffffed;color:var(--accent);border:1px solid #dce6f0;font-size:10px;padding:3px 8px;border-radius:5px}.card-body{display:flex;flex-direction:column;padding:16px 17px 12px;min-height:180px}.card-cat{font-size:10px;color:#6384a1;margin-bottom:5px}.card-name{font-size:15px;font-weight:750;line-height:1.6;text-decoration:none;color:var(--text)}.card-en{font-family:'Avenir Next',sans-serif;font-size:10px;color:#8797a7;margin-top:2px}.card-summary{font-size:11px;line-height:1.8;color:#63768a;margin:9px 0 14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;border-top:1px solid #eef2f7;padding-top:9px;font-size:10px;color:#6b8197}.preview-toggle{width:26px;height:25px;border:1px solid var(--line);background:white;border-radius:6px;color:#55718c;font-size:11px}.muted,.lead{color:var(--muted)}.site-footer{border-top:1px solid var(--line);margin-top:60px;padding:25px 0;color:var(--muted);font-size:11px}#no-results{padding:65px 24px;text-align:center;background:#fff;border:1px dashed var(--line);border-radius:12px}#no-results h3{font-size:15px}#no-results p{font-size:12px;color:var(--muted)}
/* Detail pages retain the real Flutter demos and implementation reference. */
.breadcrumb{font-size:12px;margin:28px 0 20px;color:var(--muted)}.entry{max-width:1050px;margin:auto}.entry h1{font-size:32px;line-height:1.4}.entry .en{display:block;font-size:15px;font-weight:400;color:var(--muted);margin-top:8px}.entry h2{font-size:20px;margin:32px 0 12px}.entry p{font-size:14px}.meta{display:grid;grid-template-columns:70px 1fr;gap:10px;font-size:13px}.meta dt{color:var(--muted)}.meta dd{margin:0}.tag,.chip,.badge{display:inline-block;padding:3px 10px;margin:0 5px 5px 0;background:var(--accent-soft);border-radius:6px;color:var(--accent);font-size:12px;text-decoration:none}.demo{padding:30px;background:#eaf1f8;border:1px solid var(--line);border-radius:20px;margin:30px 0}.demo-frame{position:relative;width:100%;max-width:380px;height:620px;margin:auto;overflow:hidden;border:1px solid #cbd9e8;border-radius:24px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:10px;padding-bottom:20px}.demo-preview{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.demo-play,.demo-note{position:relative}.demo-play{border:0;border-radius:30px;background:var(--accent);color:#fff;padding:13px 26px;font-weight:700}.demo-note{font-size:11px!important;background:#fffffff0;padding:5px 12px;border-radius:8px;margin:0 10px;text-align:center;color:var(--muted)}.demo-frame.is-playing{padding:0}.demo-frame iframe{width:100%;height:100%;border:0}.demo-newtab,.demo-slow{display:block;text-align:center;font-size:12px;margin-top:12px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.two-col>div{padding:0 22px 20px;border:1px solid var(--line);background:white;border-radius:12px;font-size:14px}.good h2{color:var(--good)}.bad h2{color:var(--bad)}.code{position:relative}.code pre{padding:50px 24px 24px;background:#182c43;color:#e0efff;overflow:auto;border-radius:14px;font-size:13px;line-height:1.8}.copy{position:absolute;top:12px;right:12px;background:#fff;border:0;border-radius:5px;font-size:11px;padding:5px 12px}.news-filter{display:flex;gap:10px;flex-wrap:wrap}.news-filter button{padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text)}.news-filter button[aria-pressed=true]{background:var(--accent);color:white}.news-list{list-style:none;padding:0}.news-list li{display:flex;gap:16px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding:18px 0;font-size:14px}.news-source{color:var(--muted)}.small{font-size:12px}
@media(min-width:1600px){.wrap{max-width:1500px}.card-media{height:250px}.card-media video{height:220px}}@media(max-width:1150px){.wrap{padding:0 24px}.catalog-shell{grid-template-columns:190px minmax(0,1fr);gap:26px}.catalog-sidebar{padding-right:16px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.hero h1{font-size:32px}.header-search{display:none}.hero-stage{height:240px}.hero{gap:12px}.stage-caption{font-size:10px;left:12px;right:12px}}@media(max-width:760px){.wrap{padding:0 18px}.site-header .wrap{height:68px;gap:10px}.logo{font-size:13px;gap:8px}.brand-mark{width:30px;height:33px;font-size:24px}.header-nav{gap:14px;font-size:11px}.header-nav a{padding:22px 0}.catalog-shell{display:block}.catalog-sidebar{position:static;height:auto;display:flex;gap:6px;overflow-x:auto;padding:16px 0;border:0}.sidebar-title,.sidebar-note,.sidebar-news{display:none}.category-filter{width:auto;flex-shrink:0;margin:0;padding:8px 12px;font-size:11px;border:1px solid var(--line);background:#fff}.category-filter>span{font-size:16px;width:auto}.category-filter small{margin-left:4px}.catalog-main{padding-top:0}.hero{min-height:240px;padding:20px 0 30px;grid-template-columns:1fr 0.8fr}.hero h1{font-size:27px;letter-spacing:-1px}.hero-copy>p{font-size:11px}.hero-stage{height:214px;border-radius:13px}.stage-label{font-size:9px;left:12px;top:12px}.stage-caption{display:block;font-size:10px;bottom:12px}.stage-caption>span{display:block}.orbit{transform:translate(-50%,-50%) scale(.75)}.hero-link{font-size:11px;margin-top:4px}.library{padding-top:23px}.library h2{font-size:18px}.secondary-button{font-size:10px;padding:6px 8px}.cards{gap:12px}.card-media{height:190px}.card-media video{height:165px}.card-body{padding:12px;min-height:188px}.card-name{font-size:13px}.card-summary{font-size:10px}.motion-filters{gap:6px}.motion-filters button{padding:5px 10px;font-size:10px}.search-box{padding:0 10px;gap:7px}.search-box input{font-size:11px}.search-box kbd{display:none}.two-col{grid-template-columns:1fr}.demo{padding:14px}.demo-frame{height:560px}.entry h1{font-size:26px}.site-footer{font-size:10px}}@media(max-width:390px){.hero{grid-template-columns:1fr}.hero-stage{display:none}.cards{grid-template-columns:1fr}.card-media{height:240px}.card-media video{height:215px}.card-body{min-height:165px}.header-nav a:first-child{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

/* ── 調整（2026-11-12）: 詳細ページの位置合わせ・ニュースの並び（スマホのメニューは flutter-theme.css の最後） */
.breadcrumb:has(+ .entry) { max-width: 1050px; margin-left: auto; margin-right: auto; }
.news-list li { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 4px 12px; }
.news-list time { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.news-list a { grid-column: 1 / -1; font-weight: 600; text-decoration: none; }
.news-list a:hover { text-decoration: underline; }
.news-source { justify-self: start; font-size: 12px; padding: 1px 10px; border-radius: 6px; background: var(--surface-2); color: var(--muted); }
.news-release { background: var(--accent-soft); color: var(--accent); }