:root{--bg:#f7f8fc;--card:#fff;--text:#172033;--muted:#667085;--line:#e5e7eb;--brand:#4f46e5;--brand2:#7c3aed;--soft:#eef2ff;--success:#0f9d58;--danger:#c2410c;--radius:18px;--shadow:0 12px 35px rgba(15,23,42,.08)}
*{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);line-height:1.6}a{color:inherit;text-decoration:none}.container{width:min(1160px,calc(100% - 32px));margin:auto}.topbar{background:#111827;color:#fff;font-size:13px}.topbar .container{display:flex;justify-content:center;padding:8px}.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.navin{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo{font-weight:900;font-size:21px;letter-spacing:-.6px}.logo span{color:var(--brand)}.navlinks{display:flex;gap:22px;align-items:center;font-size:14px;color:#475467}.navlinks a:hover{color:var(--brand)}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:11px;padding:11px 16px;font-weight:750;cursor:pointer;background:var(--brand);color:#fff}.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}.btn.ghost{background:var(--soft);color:var(--brand)}.hero{padding:76px 0 45px;text-align:center;background:radial-gradient(circle at 50% 0,#e9e7ff 0,rgba(233,231,255,.35) 30%,transparent 65%)}.eyebrow{display:inline-block;background:#fff;border:1px solid #ddd6fe;color:#5b21b6;padding:6px 11px;border-radius:999px;font-size:12px;font-weight:800}.hero h1{font-size:clamp(38px,6vw,68px);line-height:1.02;letter-spacing:-2.8px;margin:18px auto 14px;max-width:850px}.hero p{max-width:690px;margin:0 auto 25px;color:var(--muted);font-size:18px}.converter-card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:20px;max-width:850px;margin:26px auto}.drop{border:2px dashed #c7d2fe;background:#fafaff;border-radius:16px;padding:38px 20px;text-align:center;cursor:pointer;transition:.2s}.drop:hover,.drop.drag{border-color:var(--brand);background:#f4f3ff}.drop strong{display:block;font-size:18px}.drop small{color:var(--muted)}.drop input{display:none}.fileinfo{margin:14px 0;display:none;padding:12px;background:#f8fafc;border-radius:10px;font-size:14px}.controls{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;margin-top:15px}.field{display:flex;flex-direction:column;gap:6px;text-align:left}.field label{font-size:12px;font-weight:800;color:#475467}.field select,.field input{height:44px;border:1px solid #d0d5dd;border-radius:10px;padding:0 12px;background:#fff;font:inherit}.status{margin-top:14px;font-size:14px;color:var(--muted);min-height:22px}.ad{min-height:100px;border:1px dashed #d0d5dd;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#98a2b3;font-size:12px;margin:28px 0;background:#fbfcfd}.section{padding:55px 0}.section h2{font-size:32px;letter-spacing:-1px;margin:0 0 8px}.section-intro{color:var(--muted);margin:0 0 24px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tool{background:#fff;border:1px solid var(--line);border-radius:14px;padding:17px;transition:.2s}.tool:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(15,23,42,.07);border-color:#c7d2fe}.tool b{display:block;font-size:14px}.tool span{display:block;color:var(--muted);font-size:12px;margin-top:3px}.category-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.category{background:#fff;border:1px solid var(--line);padding:20px;border-radius:15px}.category strong{display:block}.category span{color:var(--muted);font-size:13px}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.feature .icon{font-size:26px}.faq{border-top:1px solid var(--line)}details{background:#fff;border:1px solid var(--line);border-top:0;padding:17px 18px}.faq details:first-child{border-top:1px solid var(--line);border-radius:12px 12px 0 0}.faq details:last-child{border-radius:0 0 12px 12px}.faq summary{font-weight:750;cursor:pointer}.content{padding:55px 0}.content h1{font-size:44px;letter-spacing:-1.5px}.content p,.content li{color:#475467}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:18px}.tool-head{padding:45px 0 20px}.tool-head h1{font-size:44px;line-height:1.1;letter-spacing:-1.5px;margin:0 0 10px}.tool-head p{color:var(--muted);max-width:750px}.notice{background:#ecfdf3;border:1px solid #bbf7d0;color:#166534;padding:12px 14px;border-radius:12px;font-size:13px;margin-top:15px}.footer{background:#111827;color:#cbd5e1;padding:45px 0 25px;margin-top:40px}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:35px}.footer h3,.footer h4{color:#fff;margin-top:0}.footer a{display:block;margin:7px 0;font-size:14px}.copyright{border-top:1px solid #263244;margin-top:30px;padding-top:18px;font-size:12px;color:#94a3b8}.mobile{display:none}@media(max-width:850px){.grid{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:repeat(2,1fr)}.features{grid-template-columns:1fr}.footergrid{grid-template-columns:1fr 1fr}.navlinks{display:none}.mobile{display:block}.controls{grid-template-columns:1fr}.hero{padding-top:50px}.hero h1,.tool-head h1{letter-spacing:-1.5px}.tool-head h1{font-size:36px}}@media(max-width:500px){.grid{grid-template-columns:1fr}.category-grid,.footergrid{grid-template-columns:1fr}}