:root{--bg:#faf9f7;--surface:#ffffff;--border:#e9e6e0;--text:#211f1c;--muted:#8a857c;--accent:#211f1c;--accent-soft:#f1efea;--green:#4d7c58;--green-soft:#f0f5f1;--amber:#b07d3c;--amber-soft:#faf4ea;--red:#b3453e;--radius:10px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-ui),-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:0 28px;display:flex;align-items:center;gap:28px;height:60px;position:-webkit-sticky;position:sticky;top:0;z-index:10}.topbar .brand{display:inline-flex;align-items:center}.brand-word{font-family:var(--font-brand),"Hiragino Maru Gothic ProN",sans-serif;font-weight:400;font-size:20px;letter-spacing:.1em;line-height:1}.topbar nav{display:flex;gap:2px;overflow-x:auto;-webkit-overflow-scrolling:touch}.topbar nav a{padding:6px 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