:root{--bg: #faf9f7;--surface: #ffffff;--text: #1a1a1a;--muted: #6b6b6b;--border: #e6e2dd;--accent: #4f46e5;--accent-soft: #eef2ff;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif}.dark{--bg: #0f1115;--surface: #171a21;--text: #e6e6e6;--muted: #9ca3af;--border: #2a2f3a;--accent: #a5b4fc;--accent-soft: #1e1b4b}*{box-sizing:border-box}html{color-scheme:light}html.dark{color-scheme:dark}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:1rem;line-height:1.6;-webkit-font-smoothing:antialiased}.container{max-width:780px;margin:0 auto;padding:0 1.25rem}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{line-height:1.2;letter-spacing:-.01em}.site-header{border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.9rem 1.25rem;max-width:780px;margin:0 auto}.brand{font-weight:700;color:var(--text);letter-spacing:-.02em}.brand:hover{text-decoration:none}.site-header nav{display:flex;align-items:center;gap:1.1rem}.site-header nav a{color:var(--muted);font-size:.95rem}.site-header nav a:hover{color:var(--text);text-decoration:none}.icon-btn{background:none;border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:pointer;font-size:1rem;line-height:1;padding:.35rem .55rem}.icon-btn:hover{background:var(--accent-soft)}main.container{padding-top:2.5rem;padding-bottom:4rem;min-height:calc(100vh - 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