:root{--bg: #ffffff;--fg: #1a1a1a;--muted: #6b7280;--border: #e5e7eb;--accent: #2563eb;--accent-soft: #eff6ff;--chart-base: #c9d4e3;--max-width: 760px;--radius: 12px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", Roboto, Helvetica, Arial, sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #0f1115;--fg: #e7e9ee;--muted: #9aa3b2;--border: #262a33;--accent: #60a5fa;--accent-soft: #16202e;--chart-base: #3b4456}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);line-height:1.7;font-size:17px;-webkit-font-smoothing:antialiased}.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.site-header{border-bottom:1px solid var(--border);padding:18px 0;position:sticky;top:0;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);z-index:10}.site-header 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