:root{--bg:#ffffff;--bg2:#f7f7f7;--border:#e7e7e7;--border2:#dbdbdb;--text:#111111;--text2:#4d4d4d;--muted:#6e6e6e;--nav-bg:rgba(255,255,255,.9);--card:#ffffff;--card-shadow:0 12px 32px rgba(0,0,0,.04);--btn-bg:linear-gradient(180deg,#2b2b2b,#111111);--btn-fg:#ffffff;--btn-bd:#000000;--btn-hov:brightness(1.25);--row-hover:#fafafa;--numeral:#cfcfcf;--strong:#000000;--sel-bg:#111111;--sel-fg:#ffffff}:root[data-theme=dark]{--bg:#131314;--bg2:#0f0f10;--border:#2c2c2e;--border2:#3a3a3e;--text:#eeeeee;--text2:#bcbcc0;--muted:#9d9da4;--nav-bg:rgba(19,19,20,.92);--card:#1a1a1c;--card-shadow:0 12px 32px rgba(0,0,0,.35);--btn-bg:linear-gradient(180deg,#ffffff,#e6e6e6);--btn-fg:#111111;--btn-bd:#c6c6c6;--btn-hov:brightness(.96);--row-hover:#17171a;--numeral:#3d3d42;--strong:#ffffff;--sel-bg:#eeeeee;--sel-fg:#111111}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Arial,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}::selection{background:var(--sel-bg);color:var(--sel-fg)}a{color:inherit;text-decoration:none}.wrap{max-width:1080px;margin:0 auto;padding:0 24px}h1,h2,h3{font-family:"Source Serif 4",Georgia,Times New Roman,serif;font-weight:600;letter-spacing:-.01em}.btn{display:inline-block;background:var(--btn-bg);color:var(--btn-fg);font-weight:600;font-size:14px;line-height:1.4;padding:11px 24px 13px;border-radius:8px;border:1px solid var(--btn-bd);box-shadow:inset 0 1px #ffffff24,0 1px 3px #0000002e;transition:transform .12s,filter .12s}.btn:hover{filter:var(--btn-hov);transform:translateY(-1px)}.btn:active{transform:translateY(1px)}nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid 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a{color:var(--text);font-weight:500;text-decoration:underline;text-underline-offset:3px}