:root{--paper:#fbfaf7;--ink:#16181a;--muted:#5c6368;--line:#e2ded6;--accent:#146b45;--accent-soft:#eaf3ee;--bad:#a3341f;--radius:10px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--paper);color:var(--ink);margin:0;font:16px/1.6 ui-sans-serif,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:var(--accent)}main{max-width:940px;margin:0 auto;padding:0 20px 64px}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.topbar{justify-content:space-between;align-items:center;gap:16px;max-width:940px;margin:0 auto;padding:20px;display:flex}.wordmark{letter-spacing:-.02em;color:var(--ink);font-size:19px;font-weight:700;text-decoration:none}.wordmark span{color:var(--accent)}.topbar nav{gap:20px;font-size:15px;display:flex}.topbar nav a{color:var(--muted);text-decoration:none}.topbar nav a:hover{color:var(--ink)}footer{border-top:1px solid var(--line);color:var(--muted);margin-top:56px;padding:28px 20px 48px;font-size:14px}footer p{max-width:940px;margin:0 auto 6px}.hero{padding:32px 0 8px}.hero h1{letter-spacing:-.03em;margin:0 0 18px;font-size:clamp(34px,6vw,52px);line-height:1.08}.lede{color:var(--muted);max-width:62ch;margin:0;font-size:18px}.tool{margin:28px 0 8px}.drop{cursor:pointer;text-align:center;border:2px dashed var(--line);border-radius:var(--radius);background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:6px;min-height:190px;padding:28px;transition:border-color .15s,background .15s;display:flex}.drop:hover,.drop:focus-within{border-color:var(--accent)}.drop--over{border-color:var(--accent);background:var(--accent-soft)}.drop strong{font-size:20px}.drop span{color:var(--muted);font-size:15px}.hint{color:var(--muted);flex-wrap:wrap;align-items:baseline;gap:4px 14px;margin:12px 0 0;font-size:14px;display:flex}.hint 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