/* Go Kifu — blog.css. Tokens mirror web/src/index.css; blog-only rules below. */
:root{--accent:#e70012;--accent-hover:#c4000f;--accent-light:#fff0f1;--accent-border:#ffb3b9;--bg-page:#f8fafc;--bg-panel:#ffffff;--bg-panel2:#f8fafc;--bg-tag:#f1f5f9;--border:#e2e8f0;--border-light:#f1f5f9;--text-primary:#1e293b;--text-secondary:#64748b;--text-muted:#94a3b8;--text-on-accent:#ffffff;--shadow-sm:0 1px 3px rgba(0,0,0,.10)}
[data-theme="dark"]{--accent:#e70012;--accent-hover:#ff1a2b;--accent-light:#2d0005;--accent-border:#7a0008;--bg-page:#1a1a1a;--bg-panel:#2a2a2a;--bg-panel2:#222222;--bg-tag:#1f1f1f;--border:#3a3a3a;--border-light:#333333;--text-primary:#bbbbbb;--text-secondary:#8c8c8c;--text-muted:#999999;--shadow-sm:0 1px 4px rgba(0,0,0,.5)}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Inter',system-ui,sans-serif;font-size:17px;line-height:1.7;background:var(--bg-page);color:var(--text-primary);transition:background .25s,color .25s}
a{color:var(--text-secondary);text-decoration:underline;text-decoration-color:var(--text-muted);text-underline-offset:2px}
a:hover{color:var(--text-primary);text-decoration-color:currentColor}
/* header (53px, same as app shell) */
.hdr{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:16px;height:53px;padding:0 16px;background:var(--bg-panel);border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm)}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--text-primary)}
.brand b{font-size:14px;font-weight:700}
.sep{width:1px;height:16px;background:var(--border)}
.nav{display:flex;align-items:center;gap:16px;font-size:14px}
.nav a{color:var(--text-secondary);text-decoration:none}
.nav a:hover{color:var(--text-primary)}
.nav a.on{color:var(--accent);font-weight:600}
.themeswitch{display:flex;align-items:center;gap:8px;margin-left:auto;font-size:12px;color:var(--text-muted)}
.toggle{width:40px;height:22px;padding:0;border:0;border-radius:11px;background:var(--border);position:relative;cursor:pointer;transition:background .2s}
[data-theme="dark"] .toggle{background:var(--accent)}
.toggle::after{content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;transition:transform .2s}
[data-theme="dark"] .toggle::after{transform:translateX(18px)}
/* column */
.wrap{max-width:720px;margin:0 auto;padding:56px 24px 96px}
h1{font-size:34px;line-height:1.18;letter-spacing:-.021em;font-weight:700;margin:0 0 14px}
.lede{margin:0 0 44px;font-size:16px;color:var(--text-secondary)}
/* index list */
.posts{display:flex;flex-direction:column}
.post{display:grid;grid-template-columns:124px 1fr;grid-template-areas:"thumb body" "date body";align-content:start;gap:10px 24px;padding:22px 0;border-top:1px solid var(--border-light)}
.post time{grid-area:date;align-self:start}
.pbody{grid-area:body}
.thumb{grid-area:thumb;display:block;align-self:start;aspect-ratio:1;overflow:hidden;border:1px solid var(--border);border-radius:8px;background:var(--bg-panel2);text-decoration:none}
.thumb svg{display:block;width:100%;height:100%}
.thumb img{display:block;width:100%;height:100%;object-fit:cover}
.thumb.ph{display:flex;align-items:center;justify-content:center;background:repeating-linear-gradient(135deg,var(--bg-panel2) 0 8px,var(--bg-tag) 8px 16px)}
.thumb.ph span{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;line-height:1.3;text-align:center;color:var(--text-muted)}
.post:hover .thumb{border-color:var(--accent-border)}
.post:last-child{border-bottom:1px solid var(--border-light)}
.post time{font-size:13px;color:var(--text-muted);font-variant-numeric:tabular-nums}
.post h2{margin:0 0 6px;font-size:19px;line-height:1.35;font-weight:600}
.post h2 a{color:var(--text-primary);text-decoration:none}
.post h2 a:hover{color:var(--text-secondary)}
.post p{margin:0;font-size:15px;line-height:1.6;color:var(--text-secondary);text-wrap:pretty}
/* article */
article h2{margin:46px 0 12px;font-size:24px;line-height:1.3;letter-spacing:-.012em;font-weight:650}
article h3{margin:32px 0 8px;font-size:18px;font-weight:600}
article p{margin:0 0 20px;text-wrap:pretty}
article ul,article ol{margin:0 0 20px;padding-left:22px}
article li{margin-bottom:8px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.86em;background:var(--bg-tag);padding:2px 6px;border-radius:5px}
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 40px;padding-bottom:22px;border-bottom:1px solid var(--border-light);font-size:14px;line-height:1.5;color:var(--text-secondary)}
.byline b{font-weight:600;color:var(--text-primary)}
.byline .dot{color:var(--text-muted)}
.byline a,.endnote b a{color:inherit;text-decoration:none}
.byline a:hover,.endnote b a:hover{color:var(--accent)}
/* diagrams */
figure{margin:34px 0;padding:20px;background:var(--bg-panel);border:1px solid var(--border);border-radius:12px}
figure svg{display:block;width:100%;max-width:430px;height:auto;margin:0 auto}
figcaption{margin-top:16px;font-size:14px;line-height:1.55;color:var(--text-secondary)}
.legend{display:inline-block;margin-top:10px;padding:3px 9px;border-radius:6px;background:var(--bg-tag);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;color:var(--text-secondary)}
/* photos */
.photo{margin:34px 0}
.photo .ph{display:flex;align-items:center;justify-content:center;aspect-ratio:16/10;border:1px solid var(--border);border-radius:12px;background:repeating-linear-gradient(135deg,var(--bg-panel2) 0 10px,var(--bg-tag) 10px 20px)}
.photo .ph span{padding:6px 10px;border:1px solid var(--border);border-radius:6px;background:var(--bg-panel);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--text-muted)}
/* cta */
.cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin:36px 0;padding:20px 22px;background:var(--accent-light);border:1px solid var(--accent-border);border-radius:12px}
.cta strong{display:block;margin-bottom:3px;font-size:16px;color:var(--text-primary)}
.cta p{margin:0;max-width:46ch;font-size:14px;line-height:1.5;color:var(--text-secondary)}
.btn{flex:0 0 auto;padding:10px 18px;border-radius:8px;background:var(--accent);color:var(--text-on-accent);font-size:14px;font-weight:600;text-decoration:none}
.btn:hover{background:var(--accent-hover);color:var(--text-on-accent)}
/* article footer */
.endnote{display:flex;gap:16px;margin-top:56px;padding-top:26px;border-top:1px solid var(--border);font-size:14px;line-height:1.6;color:var(--text-secondary)}
.endnote .av{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--bg-tag);font-size:14px;font-weight:600;color:var(--text-secondary)}
.endnote b{display:block;color:var(--text-primary)}
.back{margin-top:26px;font-size:14px}
/* author page */
.bio{margin:0 0 20px;max-width:62ch;color:var(--text-secondary)}
.profiles{margin:0 0 44px;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:8px 20px;font-size:14px}
.subhead{margin:0 0 4px;font-size:15px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em}
@media(max-width:640px){
body{font-size:16px}
.hdr{gap:12px;padding:0 12px}
.brand b{display:none}
.nav{gap:13px;font-size:13.5px}
.themeswitch{gap:6px}
.wrap{padding:32px 20px 64px}
h1{font-size:27px}
article h2{margin:36px 0 10px;font-size:21px}
.posts{gap:32px}
.post{grid-template-columns:1fr;grid-template-areas:"thumb" "body" "date";gap:0;padding:0;border-top:0}
.post:last-child{border-bottom:0}
.thumb{width:100%;max-width:240px;aspect-ratio:1;margin-bottom:12px;border-radius:10px}
.thumb.ph span{font-size:10px}
.post h2{font-size:18px}
.post time{margin-top:7px}
figure{margin:28px -20px;padding:12px 0;border-left:0;border-right:0;border-radius:0}
figcaption,.legend{margin-left:16px;margin-right:16px}
.cta{align-items:flex-start;padding:18px}
}