:root{
  --bg:#ffffff;
  --ink:#141414;
  --muted:#6b6b6b;
  --faint:#9a9a9a;
  --line:#ececec;
  --line-2:#f4f4f4;
  --accent:#E0602C;
  --accent-weak:#fdf1ea;
  --radius:16px;
  --maxw:1080px;
  --shadow:0 1px 2px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Manrope",-apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif;
  font-size:16px;line-height:1.6;letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{opacity:.7}
img{max-width:100%;display:block}
h1,h2,h3{letter-spacing:-.03em;line-height:1.1;font-weight:700;margin:0}
p{margin:0}

/* layout */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.narrow{max-width:720px}

/* header */
.site-hdr{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.site-hdr .row{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand svg{width:28px;height:28px;display:block}
.brand span{font-weight:700;font-size:18px;letter-spacing:-.03em}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--muted);font-size:14px;font-weight:500}
.nav a.active,.nav a:hover{color:var(--ink);opacity:1}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang button{appearance:none;border:0;background:transparent;color:var(--faint);font:inherit;font-size:12px;font-weight:700;padding:6px 12px;cursor:pointer;letter-spacing:0}
.lang button.on{background:var(--ink);color:#fff}
.burger{display:none;appearance:none;border:0;background:transparent;cursor:pointer;padding:8px}
.burger svg{width:22px;height:22px;stroke:var(--ink)}

/* buttons */
.btn{appearance:none;border:0;cursor:pointer;font:inherit;font-weight:600;border-radius:12px;padding:13px 22px;transition:transform .08s ease,opacity .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:disabled{background:#e7e2df;color:#b8b1ac;cursor:not-allowed}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:10px}

/* hero */
.hero{padding:76px 0 40px;text-align:center}
.hero .eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--accent);background:var(--accent-weak);padding:6px 13px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:52px;max-width:16ch;margin:0 auto 18px}
.hero p.sub{font-size:19px;color:var(--muted);max-width:52ch;margin:0 auto}

/* section */
.section{padding:64px 0}
.section h2{font-size:32px;text-align:center;margin-bottom:8px}
.section .lead{text-align:center;color:var(--muted);max-width:56ch;margin:0 auto 44px}
.eyebrow-c{text-align:center;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}

/* grid */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:#fff}
.card .num{width:32px;height:32px;border-radius:9px;background:var(--accent-weak);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;margin-bottom:16px}
.card h3{font-size:17px;margin-bottom:7px}
.card p{color:var(--muted);font-size:14.5px}

/* converter */
.tool{max-width:660px;margin:36px auto 0}
.formats{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:18px}
.chip{appearance:none;border:1px solid var(--line);background:#fff;color:var(--muted);font:inherit;font-size:13.5px;font-weight:600;padding:9px 16px;border-radius:999px;cursor:pointer}
.chip:hover{border-color:#d9d9d9}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.drop{border:1.5px dashed #d7d7d7;border-radius:var(--radius);background:#fcfcfc;padding:44px 24px;text-align:center;transition:border-color .15s,background .15s;cursor:pointer}
.drop.over{border-color:var(--accent);background:var(--accent-weak)}
.drop .ic{width:44px;height:44px;margin:0 auto 14px;color:var(--faint)}
.drop .big{font-weight:600;font-size:16px;margin-bottom:5px}
.drop .small{color:var(--faint);font-size:13.5px}
.filelist{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.fileitem{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.fileitem .thumb{width:44px;height:44px;border-radius:8px;object-fit:cover;background:#f2f2f2;flex:none}
.fileitem .meta{flex:1;min-width:0}
.fileitem .nm{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fileitem .sz{font-size:12.5px;color:var(--faint)}
.fileitem .rm{appearance:none;border:0;background:transparent;color:var(--faint);cursor:pointer;font-size:20px;line-height:1;padding:4px 8px}
.fileitem .rm:hover{color:var(--ink)}
.toolbar{display:flex;align-items:center;gap:12px;margin-top:18px;flex-wrap:wrap}
.toolbar .count{color:var(--muted);font-size:14px;margin-right:auto}
.status{margin-top:14px;font-size:14px;color:var(--muted);text-align:center;min-height:20px}
.bar{height:6px;border-radius:999px;background:var(--line-2);overflow:hidden;margin-top:14px}
.bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s ease}

/* faq */
.faq{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
details.qa{border:1px solid var(--line);border-radius:12px;padding:16px 18px}
details.qa summary{font-weight:600;font-size:15.5px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";color:var(--faint);font-weight:400;font-size:20px}
details.qa[open] summary::after{content:"\2013"}
details.qa p{margin-top:11px;color:var(--muted);font-size:14.5px}

/* list-links */
.linklist{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.linkrow{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:12px;padding:17px 20px;color:var(--ink);font-weight:600;font-size:15.5px}
.linkrow:hover{opacity:1;border-color:#d9d9d9}
.linkrow .arw{color:var(--accent)}

/* article */
.article{max-width:680px;margin:0 auto;padding:40px 0 8px}
.crumb{font-size:13px;color:var(--faint);margin-bottom:14px}
.crumb a{color:var(--faint)}
.article h1{font-size:38px;margin-bottom:16px}
.article .intro{font-size:18px;color:var(--muted);margin-bottom:8px}
.article h2{font-size:23px;margin:40px 0 12px}
.article p{margin:0 0 14px}
.article ul,.article ol{margin:0 0 14px;padding-left:22px}
.article li{margin-bottom:7px}
.note{background:var(--accent-weak);border-radius:12px;padding:16px 18px;font-size:14.5px;color:#8a3d17;margin:20px 0}
.cta-card{border:1px solid var(--line);border-radius:var(--radius);padding:30px;text-align:center;margin:44px 0}
.cta-card h3{font-size:19px;margin-bottom:6px}
.cta-card p{color:var(--muted);margin-bottom:18px}

/* comparison table */
.cmp{border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:28px 0}
.cmp .h,.cmp .r{display:grid;grid-template-columns:1fr 1fr 1fr}
.cmp .h{background:var(--ink);color:#fff;font-weight:700;font-size:13px}
.cmp .h>div,.cmp .r>div{padding:13px 16px}
.cmp .r>div{font-size:13.5px;color:#333;border-top:1px solid var(--line)}
.cmp .h>div+div,.cmp .r>div+div{border-left:1px solid rgba(0,0,0,.06)}
.cmp .h>div+div{border-left:1px solid rgba(255,255,255,.14)}

/* ad slot */
.ad{max-width:336px;margin:0 auto;min-height:100px;display:flex;align-items:center;justify-content:center}
.ad.placeholder{border:1px dashed #e0e0e0;border-radius:10px;background:repeating-linear-gradient(45deg,#fafafa,#fafafa 9px,#fff 9px,#fff 18px);color:#c4c4c4;font:11px ui-monospace,Menlo,monospace;min-height:100px;text-align:center;padding:10px}
.ad-wrap{padding:44px 0}

/* footer */
.site-ftr{border-top:1px solid var(--line);background:#fafafa;padding:52px 0 40px;margin-top:24px}
.site-ftr .top{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between}
.site-ftr .tag{max-width:280px;color:var(--muted);font-size:13.5px;margin-top:10px}
.site-ftr .cols{display:flex;gap:56px;flex-wrap:wrap}
.site-ftr .col{display:flex;flex-direction:column;gap:11px}
.site-ftr .col a{color:var(--muted);font-size:14px}
.site-ftr .bottom{margin-top:32px;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:var(--faint);font-size:12.5px}

/* cookie banner */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;max-width:540px;margin:0 auto;background:var(--ink);color:#fff;border-radius:16px;padding:18px 20px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;box-shadow:0 16px 50px rgba(0,0,0,.28);z-index:60}
.cookie p{flex:1;min-width:200px;font-size:13px;color:#e6e6e6;line-height:1.5}
.cookie .acts{display:flex;gap:10px}
.cookie .acts button{appearance:none;border:0;cursor:pointer;font:inherit;font-weight:600;font-size:13px;padding:9px 16px;border-radius:10px}
.cookie .acc{background:var(--accent);color:#fff}
.cookie .ref{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.28)}
.hidden{display:none !important}

@media (max-width:820px){
  .grid-3{grid-template-columns:1fr}
  .hero h1{font-size:36px}
  .hero p.sub{font-size:17px}
  .section h2{font-size:26px}
  .article h1{font-size:30px}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 18px 16px}
  .nav.open a{padding:12px 0;border-bottom:1px solid var(--line-2)}
  .burger{display:block}
  .hero{padding:52px 0 32px}
  .section{padding:48px 0}
  .toolbar .count{width:100%;margin-bottom:6px}
  .toolbar .btn{flex:1}
}