*{box-sizing:border-box}:root{--background:#f3f7f1;--surface:#fff;--surface-soft:#f8faf7;--text:#171a17;--muted:#626861;--soft:#858b84;--line:#dce4d9;--line-dark:#c4cec1;--green:#416848;--green-soft:#e8f0e6}html{scroll-behavior:smooth;background:var(--background)}body{background:var(--background);min-width:320px;min-height:100vh;color:var(--text);margin:0;font-family:Arial,Helvetica,sans-serif}button,input,select{font:inherit}button{-webkit-tap-highlight-color:transparent}.header{border-bottom:1px solid var(--line);background:#f3f7f1f5;justify-content:space-between;align-items:center;height:68px;padding:0 48px;display:flex}.brand{color:var(--text);align-items:center;gap:9px;font-size:18px;font-weight:700;text-decoration:none;display:flex}.brand-mark{background:var(--text);color:#fff;border-radius:6px;place-items:center;width:27px;height:27px;font-size:14px;display:grid}.nav{gap:30px;display:flex}.nav a{color:#4d524d;font-size:14px;text-decoration:none}.nav a:hover{color:var(--text)}.converter-hero{padding:76px 24px 58px}.hero-inner,.section-inner{width:100%;max-width:930px;margin:0 auto}.tool-heading{margin-bottom:34px}.tool-label,.section-label{color:var(--green);letter-spacing:1.2px;margin-bottom:10px;font-size:11px;font-weight:700;display:block}.tool-heading h1{letter-spacing:-1.5px;max-width:720px;margin:0 0 12px;font-size:44px;line-height:1.08}.tool-heading p{max-width:650px;color:var(--muted);margin:0;font-size:17px;line-height:1.5}.drop-zone{background:var(--surface);border:1.5px dashed #b9c5b5;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;width:100%;min-height:355px;padding:42px;transition:border-color .15s,background .15s;display:flex}.drop-zone:hover{border-color:#8da18a}.drop-zone.dragging{border-color:var(--green);background:#f9fbf8}.upload-symbol{border:1px solid 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