:root{--b:#2563eb;--bd:#1d4ed8;--bg:#f8fafc;--text:#0f172a;--muted:#64748b;--line:#e2e8f0}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}.wrap{max-width:1180px;margin:auto;padding:0 20px}.header{position:sticky;top:0;z-index:10;background:#fffffff2;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-in{height:64px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-weight:800}.logo{width:38px;height:38px;border-radius:12px;background:var(--b);color:#fff;display:grid;place-items:center}.nav{display:flex;gap:6px}.nav a{padding:9px 12px;border-radius:9px;color:#475569;font-size:14px}.nav a:hover{background:#f1f5f9}.hero{background:#fff;border-bottom:1px solid var(--line);padding:90px 0;text-align:center}.pill{display:inline-block;padding:7px 12px;border-radius:999px;background:#eff6ff;color:#1e40af;border:1px solid #dbeafe;font-size:14px;font-weight:700}.hero h1{font-size:clamp(42px,7vw,72px);line-height:1.05;max-width:900px;margin:24px auto 18px;letter-spacing:-.04em}.hero p{font-size:19px;line-height:1.7;color:var(--muted);max-width:680px;margin:auto}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 18px;background:var(--b);color:#fff;font-weight:700;cursor:pointer}.btn:hover{background:var(--bd)}.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}.hero .btn{margin-top:28px}.section{padding:60px 0}.section h2{font-size:32px;margin:0 0 8px}.section-sub{color:var(--muted);margin:0 0 24px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 2px 8px #0f172a08;transition:.2s}.card:hover{transform:translateY(-2px);box-shadow:0 14px 40px #0f172a12}.card h3{margin:0;font-size:17px}.card p{color:var(--muted);font-size:14px;line-height:1.6}.open{color:var(--b);font-weight:700;font-size:14px}.tool-main{max-width:930px;margin:auto;padding:46px 20px}.crumb{font-size:14px;color:var(--muted)}.tool-head{text-align:center;padding:22px 0}.tool-head h1{font-size:clamp(36px,6vw,56px);letter-spacing:-.04em;margin:0}.tool-head p{font-size:18px;line-height:1.7;color:var(--muted);max-width:650px;margin:16px auto}.panel,.info{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:0 14px 40px #0f172a0d}.drop{display:grid;place-items:center;text-align:center;border:2px dashed #cbd5e1;border-radius:18px;padding:48px 20px;background:#f8fafc;cursor:pointer}.drop:hover{border-color:var(--b)}input,textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit}textarea{min-height:230px;resize:vertical}.controls{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.result{white-space:pre-wrap;min-height:110px;background:#0f172a;color:#e2e8f0;border-radius:16px;padding:16px;margin-top:18px;overflow:auto}.label{display:block;font-size:14px;font-weight:700;margin:16px 0 7px}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}.feature{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px}.feature b{display:block;margin-bottom:5px}.feature span{color:var(--muted);font-size:14px}.info{margin-top:24px}.info h2{margin-top:26px}.footer{background:#fff;border-top:1px solid var(--line);padding:38px 0;margin-top:70px}.footer-in{display:flex;justify-content:space-between;gap:20px}.footer-links{display:flex;gap:16px;color:var(--muted);font-size:14px}@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:620px){.nav{display:none}.grid,.features{grid-template-columns:1fr}.hero{padding:64px 0}.panel{padding:18px}.footer-in{flex-direction:column}}