/* Apple-style: system type with size-specific tracking, translucent sticky nav, generous whitespace, soft depth, press feedback. Gold kept as the brand accent. */
:root{--bg:#fbfbfd;--surface:#fff;--fg:#1d1d1f;--muted:#6e6e73;--line:rgba(0,0,0,.08);--tint:#f5f5f7;--accent:#8a7442;--btn:#1d1d1f;--btn-fg:#fff;
--nav:rgba(251,251,253,.72);--shadow:0 1px 2px rgba(0,0,0,.04),0 8px 28px rgba(0,0,0,.06);--shadow-hi:0 2px 6px rgba(0,0,0,.06),0 18px 44px rgba(0,0,0,.10);
--font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",system-ui,sans-serif;
--display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Hiragino Sans","Noto Sans JP",system-ui,sans-serif}
@media (prefers-color-scheme:dark){:root{--bg:#000;--surface:#1c1c1e;--fg:#f5f5f7;--muted:#a1a1a6;--line:rgba(255,255,255,.12);--tint:#161618;--accent:#d4bc84;--btn:#f5f5f7;--btn-fg:#1d1d1f;
--nav:rgba(22,22,24,.72);--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 28px rgba(0,0,0,.4);--shadow-hi:0 2px 6px rgba(0,0,0,.5),0 18px 44px rgba(0,0,0,.55);color-scheme:dark}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:400 1.0625rem/1.85 var(--font);letter-spacing:.01em;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

/* Translucent nav: content scrolls under it */
.top{position:sticky;top:0;z-index:10;display:flex;flex-wrap:wrap;gap:4px 28px;align-items:center;justify-content:space-between;
padding:12px max(16px,calc((100% - 1040px)/2));background:var(--nav);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);box-shadow:0 1px 0 var(--line)}
.logo{font:600 .95rem/1 var(--display);letter-spacing:.14em;color:var(--fg);display:flex;gap:10px;align-items:baseline}
.logo span{font-weight:400;letter-spacing:.06em;color:var(--muted);font-size:.85em}
.logo:hover{text-decoration:none}
nav{display:flex;flex-wrap:wrap;gap:2px 22px;font-size:.82rem}
nav a{color:var(--fg);opacity:.8}
nav a:hover{opacity:1;text-decoration:none}

main{max-width:1040px;margin:0 auto;padding:0 16px 72px}
h1,h2,h3{font-family:var(--display);text-wrap:balance}
h1{font-size:clamp(1.9rem,4.4vw,2.6rem);line-height:1.3;letter-spacing:-.01em;font-weight:700;margin:.4em 0 .5em}
h2{font-size:clamp(1.4rem,3vw,1.75rem);line-height:1.35;letter-spacing:-.005em;font-weight:700;margin:2.2em 0 .7em}
h3{font-size:1.15rem;line-height:1.5;font-weight:600;margin:1.8em 0 .4em}
.lede{color:var(--muted);font-size:1.1rem;margin-top:0}
main>h1:first-child{margin-top:1.4em}

/* Home */
.hero{text-align:center;padding:clamp(56px,10vw,112px) 0 clamp(40px,7vw,72px)}
.hero .eyebrow{font-size:.8rem;letter-spacing:.18em;color:var(--accent);font-weight:600;margin:0}
.hero h1{font-size:clamp(2.4rem,7.5vw,4.4rem);line-height:1.12;letter-spacing:-.025em;font-weight:800;margin:.35em 0 .4em}
.hero .sub{color:var(--muted);font-size:clamp(1.05rem,2.2vw,1.3rem);line-height:1.7;max-width:34em;margin:0 auto}
.ctas{display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:center;align-items:center;margin:32px 0 0}
.band{margin-top:24px}
.band>h2{margin-top:1.4em}
.feature{display:grid;gap:10px;background:var(--surface);border-radius:22px;padding:clamp(24px,5vw,48px);box-shadow:var(--shadow);color:var(--fg);margin-bottom:20px}
.feature .kicker{font-size:.8rem;color:var(--accent);font-weight:600;letter-spacing:.06em}
.feature .t{font:700 clamp(1.4rem,3.4vw,2rem)/1.35 var(--display);letter-spacing:-.01em;text-wrap:balance}
.feature .s{color:var(--muted);max-width:42em}
.feature .more,.link{color:var(--accent);font-weight:500}
.all{text-align:center;margin-top:28px}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:20px}
.card{display:grid;gap:6px;align-content:start;background:var(--surface);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);color:var(--fg);padding-bottom:18px}
.card img{aspect-ratio:4/5;object-fit:cover;width:100%;background:var(--tint)}
.card .t{font-weight:600;font-size:1rem;line-height:1.55;padding:12px 18px 0}
.card .s{font-size:.82rem;line-height:1.6;color:var(--muted);padding:0 18px}
.card:not(:has(img)) .t{padding-top:20px}
.feature,.card,.btn{transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s cubic-bezier(.2,.8,.2,1)}
.feature:hover,.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hi);text-decoration:none}
.feature:active,.card:active,.btn:active{transform:scale(.98);transition-duration:.1s}

/* Article */
.post{max-width:680px;margin:0 auto;padding-top:clamp(32px,6vw,64px)}
.post h1{font-size:clamp(1.9rem,5vw,2.75rem);line-height:1.28;letter-spacing:-.02em;font-weight:800}
.crumb{font-size:.82rem;margin:0;font-weight:500}
.date{font-size:.85rem;color:var(--muted);margin:0 0 2em}
.post p,.post li{font-size:1.0625rem}
.post ul{padding-left:1.2em}
.post li{margin:.4em 0}
.answer{background:var(--tint);padding:22px 24px;border-radius:18px;line-height:1.8}
.tbl{overflow-x:auto;margin:1.2em 0}
.post table{border-collapse:collapse;width:100%;font-size:.95rem;font-variant-numeric:tabular-nums}
.post th,.post td{border-bottom:1px solid var(--line);padding:12px 12px;text-align:left;vertical-align:top}
.post th{color:var(--muted);font-weight:600;font-size:.85rem}
.gallery{display:grid;gap:14px;margin:28px 0}
.gallery img{border-radius:18px;box-shadow:var(--shadow)}
.credit{font-size:.8rem;color:var(--muted)}
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-weight:600;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--muted);font-weight:400}
details[open] summary::after{content:"−"}
details p{color:var(--muted);margin:.6em 0 0}

/* Follow */
.follow{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;background:var(--surface);box-shadow:var(--shadow);border-radius:22px;padding:24px 28px;margin:56px 0 0}
.follow p{margin:0;font-weight:500}
.btn{display:inline-block;background:var(--btn);color:var(--btn-fg);border-radius:980px;padding:11px 24px;font-size:.95rem;font-weight:500;white-space:nowrap}
.btn:hover{text-decoration:none;opacity:.88}

footer{border-top:1px solid var(--line);padding:32px 16px 48px;text-align:center;font-size:.78rem;line-height:1.8;color:var(--muted)}
footer p{margin:.2em 0}
footer a{color:var(--muted)}
a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

@media (prefers-reduced-motion:reduce){*{transition:none!important}.feature:hover,.card:hover{transform:none}}
@media (prefers-reduced-transparency:reduce){.top{background:var(--bg);-webkit-backdrop-filter:none;backdrop-filter:none}}
@media (prefers-contrast:more){:root{--line:currentColor;--muted:var(--fg)}.card,.feature,.follow{box-shadow:none;border:1px solid var(--fg)}}
figure{margin:28px 0}
figure img{width:100%;border-radius:18px;box-shadow:var(--shadow)}
figcaption{font-size:.75rem;color:var(--muted);margin-top:8px}
figcaption a{color:var(--muted)}
.feature img{width:calc(100% + 2*clamp(24px,5vw,48px));max-width:none;margin:calc(-1*clamp(24px,5vw,48px)) calc(-1*clamp(24px,5vw,48px)) 8px;aspect-ratio:2/1;object-fit:cover}
.feature{overflow:hidden}
.grid4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:860px){.grid4{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}}
.refs{font-size:.9rem}
.note{font-size:.85rem;color:var(--muted)}
.logo{align-items:center}
.logo .mark{width:30px;height:30px;border-radius:50%;box-shadow:0 0 0 1px var(--line),0 2px 8px rgba(0,0,0,.12);transition:transform .35s cubic-bezier(.2,.8,.2,1)}
.logo:hover .mark{transform:scale(1.06) rotate(-4deg)}
.logo:active .mark{transform:scale(.96);transition-duration:.1s}
.logo .mark{box-shadow:0 0 0 1px var(--line)}
@media (prefers-color-scheme:dark){.logo .mark{filter:invert(1)}}
/* Japanese line breaks: build.py puts <wbr> between phrases (BudouX); keep-all breaks only there, strict keeps 。、ー and small kana off line starts */
body{word-break:keep-all;overflow-wrap:anywhere;line-break:strict}