:root{--ink:#111319;--paper:#f5f4ee;--acid:#b6f36b;--hot:#ff6b4a;--blue:#76aefc;--violet:#8077ff;--muted:#666a73;--line:#c9c9c2;--mono:"IBM Plex Mono",monospace;--sans:"Noto Sans SC",system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.78}.progress{position:fixed;z-index:30;top:0;left:0;height:3px;width:0;background:var(--hot)}.masthead{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:15px clamp(20px,4vw,64px);border-bottom:1px solid var(--line);background:rgba(245,244,238,.92);backdrop-filter:blur(12px)}.wordmark,.masthead a{color:var(--ink);text-decoration:none}.wordmark{font:600 .76rem var(--mono);letter-spacing:.12em}.masthead nav{display:flex;gap:22px;font:500 .76rem var(--mono)}.masthead nav a:hover{text-decoration:underline;text-underline-offset:5px}.hero{min-height:calc(100vh - 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