:root{color-scheme:light;--ink:#172b31;--muted:#526568;--green:#17664f;--paper:#f6f7f2;--line:#dce2da;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,textarea{font:inherit}a:focus-visible,button:focus-visible,textarea:focus-visible{outline:3px solid #208466;outline-offset:5px}.wrap{width:min(1100px,calc(100% - 64px));margin:auto}.mono{font:12px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em}.skip{position:absolute;top:-90px;left:20px;padding:10px;background:var(--white);z-index:2}.skip:focus{top:10px}.header{display:flex;align-items:center;justify-content:space-between;padding-top:30px;padding-bottom:30px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:700;letter-spacing:.05em}.brand-mark{background:var(--green);color:white;font:18px/40px ui-monospace,Consolas,monospace;width:42px;text-align:center;border-radius:9px}nav{display:flex;gap:30px;font-size:14px}nav a:hover,.back:hover{color:var(--green)}.hero{position:relative;padding-top:78px;padding-bottom:68px}.eyebrow{display:flex;align-items:center;gap:9px;color:var(--green);font-size:12px;font-weight:650;letter-spacing:.16em;margin:0 0 16px}.eyebrow>span{width:7px;height:7px;border-radius:50%;background:var(--green)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(38px,5.6vw,66px);line-height:1.25;letter-spacing:-.045em;font-weight:750;margin-bottom:24px}.intro{color:var(--muted);font-size:18px;max-width:610px;margin-bottom:28px}.button{display:inline-flex;align-items:center;gap:40px;background:var(--green);color:white;border-radius:6px;padding:10px 21px;font-weight:600;font-size:14px}.button:hover{background:#0e4d3b}.hero-note{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;margin-top:64px;padding-top:20px;border-top:1px solid var(--line)}.hero-note .mono{color:var(--green)}.notes{padding-top:44px;padding-bottom:66px}.section-heading{display:flex;justify-content:space-between;gap:25px;align-items:end;padding-bottom:26px}.section-heading h2{margin-bottom:0}h2{font-size:28px;line-height:1.5;letter-spacing:-.025em}.section-heading>.mono{color:var(--muted);white-space:nowrap;margin-bottom:7px}.note{display:grid;grid-template-columns:80px 1fr;gap:25px;border-top:1px solid var(--line);padding:30px 0}.note-index{font-size:18px;color:var(--green);padding-top:3px}.tag{font-size:12px;color:var(--green);margin-bottom:8px}h3{font-size:22px;line-height:1.5;margin-bottom:14px}.note p:not(.tag){max-width:880px;color:var(--muted);margin-bottom:12px}.note .takeaway{font-size:14px}.note p:last-child{margin-bottom:0}code{font-family:ui-monospace,Consolas,monospace;font-size:.85em;background:#e7ece4;padding:2px 4px;border-radius:3px;overflow-wrap:anywhere}.tool-section{background:#e9eee6;border-block:1px solid #dce4d8;padding:60px 0}.tool-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.tool-layout p{color:var(--muted);max-width:350px}.tool-layout .privacy{font-size:13px;border-top:1px solid #cbd7c8;padding-top:18px;margin-top:26px}.tool{background:var(--white);border:1px solid #d6dfd2;border-radius:10px;padding:24px}label{display:block;font-weight:650;font-size:14px;margin-bottom:10px}textarea{display:block;resize:vertical;width:100%;min-height:150px;border:1px solid #c6d1c1;border-radius:5px;padding:12px;color:var(--ink);background:#fcfdfb;font-size:15px;line-height:1.6}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px}.stats div{display:flex;flex-direction:column}.stats output{font-size:24px;font-weight:700;line-height:1.3;overflow-wrap:anywhere}.stats span{font-size:11px;color:var(--muted);margin-top:6px}.tool-foot{display:flex;gap:20px;align-items:center;margin-top:20px;border-top:1px solid #e4e9e1;padding-top:16px}.tool-foot small{color:var(--muted);font-size:11px;line-height:1.5}.tool-foot button{border:1px solid #c7d2c2;border-radius:5px;background:white;color:var(--green);cursor:pointer;padding:4px 14px;white-space:nowrap;margin-left:auto;font-size:13px}.tool-foot button:hover{background:var(--paper)}.about{padding-top:65px;padding-bottom:65px}.about p:not(.eyebrow){max-width:740px;color:var(--muted)}.back{display:inline-block;margin-top:10px;font-size:14px;color:var(--green)}.footer{border-top:1px solid var(--line);padding:25px 0;color:var(--muted);font-size:12px}.footer-inner{display:flex;gap:24px;flex-wrap:wrap;align-items:center;justify-content:space-between}.footer a:hover{text-decoration:underline}
@media(max-width:760px){.wrap{width:calc(100% - 36px)}.header{padding-block:20px;gap:20px}.brand{font-size:15px;gap:8px}.brand-mark{width:32px;font-size:15px;line-height:32px}nav{gap:15px;font-size:12px}.hero{padding-top:55px;padding-bottom:35px}.intro{font-size:16px}.hero-note{margin-top:45px;gap:15px;align-items:start}.section-heading{display:block}.section-heading>.mono{display:none}h2{font-size:24px}.note{grid-template-columns:35px 1fr;gap:10px}.note h3{font-size:20px}.tool-layout{grid-template-columns:1fr;gap:20px}.tool-layout p{max-width:none}.tool-section{padding-block:40px}.tool{padding:18px}.stats{gap:8px}.stats output{font-size:22px}.footer-inner{justify-content:center;text-align:center;gap:8px 20px}.about{padding-block:45px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}