/* Minimal, single-column, markdown-like */
:root { --fg:#111; --bg:#fff; --muted:#555; --border:#e5e7eb; --link:#0366d6; }
* { box-sizing: border-box; }
html,body { margin:0; padding:0; background:var(--bg); color:var(--fg); font:16px/1.55 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif; }
.container { max-width: 860px; margin: 0 auto; padding: 8px 12px; }
header { border-bottom:1px solid var(--border); }
header .title { margin: 6px 0 8px; font-size: 22px; font-weight: 700; }
header .subtitle { margin: 0 0 6px; color: var(--muted); font-size: 14px; }
nav { font-size: 14px; margin: 4px 0 8px; }
nav a { margin-right: 12px; color: var(--link); text-decoration: underline; }
main section { padding: 8px 0; border-top:1px solid var(--border); }
main section:first-of-type { border-top:0; }
h1 { font-size: 28px; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 10px 0 6px; }
h3 { font-size: 18px; margin: 8px 0 4px; }
p { margin: 4px 0; }
ul { margin: 4px 0 4px 22px; padding: 0; }
li { margin: 2px 0; }
a { color: var(--link); }
code,pre { font-family: ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-size: 0.95em; }
pre { background: #f6f8fa; padding: 8px 10px; overflow: auto; border:1px solid var(--border); }
footer { color: var(--muted); font-size: 13px; padding: 12px 0 20px; border-top:1px solid var(--border); text-align: center; }

/* Avatar in About */
.about-avatar { display: inline-block; vertical-align: top; margin: 2px 12px 8px 0; }
.about-avatar img { width: 192px; height: 192px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); }