:root{
  --bg:#f7f7f5; --card:#ffffff; --ink:#171717; --muted:#5f6368; --line:#e5e5e0;
  --brand:#0f766e; --brand-dark:#0b5e57; --accent:#f59e0b; --pro:#7c3aed;
  --radius:14px; --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;gap:18px;height:58px}
.logo{font-weight:800;font-size:19px;color:var(--ink);letter-spacing:-.02em;white-space:nowrap}
.logo b{color:var(--brand)}
.logo:hover{text-decoration:none}
nav.main{display:flex;gap:16px;margin-left:auto;font-size:14px;overflow-x:auto;white-space:nowrap}
nav.main a{color:var(--muted)}
nav.main a:hover{color:var(--ink)}
.btn{display:inline-block;border:0;cursor:pointer;border-radius:10px;padding:12px 22px;font-size:15px;font-weight:700;
  background:var(--brand);color:#fff;transition:background .15s}
.btn:hover{background:var(--brand-dark);text-decoration:none}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn.pro{background:var(--pro)}
.btn.pro:hover{background:#6d28d9}
.btn.small{padding:8px 14px;font-size:13px;border-radius:8px}
.hero{padding:44px 0 8px;text-align:center}
.hero h1{font-size:clamp(28px,4.6vw,44px);line-height:1.15;margin:0 0 12px;letter-spacing:-.02em}
.hero p.lede{font-size:17px;color:var(--muted);max-width:680px;margin:0 auto 8px}
.hero .trust{font-size:13px;color:var(--muted);margin-top:10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 1px 3px rgba(0,0,0,.05)}
.converter{margin:26px auto 8px;padding:22px}
.drop{border:2px dashed #c9c9c2;border-radius:12px;padding:34px 18px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--brand);background:#f0fdfa}
.drop .big{font-size:17px;font-weight:700}
.drop .sub{font-size:13px;color:var(--muted);margin-top:6px}
.drop input{display:none}
.options{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:16px 0}
.options label{display:block;font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:5px}
.options select,.options input[type=text]{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;font-size:14px;background:#fff;color:var(--ink)}
.pro-tag{display:inline-block;background:#ede9fe;color:var(--pro);font-size:11px;font-weight:800;border-radius:5px;padding:1px 6px;margin-left:5px;vertical-align:1px}
.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:6px}
.actions .note{font-size:13px;color:var(--muted)}
.previews{display:none;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px}
.previews.on{display:grid}
.pane{border:1px solid var(--line);border-radius:10px;overflow:hidden}
.pane h3{margin:0;padding:9px 12px;font-size:13px;background:#fafaf9;border-bottom:1px solid var(--line);color:var(--muted)}
.pane .view{min-height:220px;max-height:420px;display:flex;align-items:center;justify-content:center;padding:12px;
  background-image:linear-gradient(45deg,#eee 25%,transparent 25%),linear-gradient(-45deg,#eee 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#eee 75%),linear-gradient(-45deg,transparent 75%,#eee 75%);
  background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;background-color:#fff}
.pane img,.pane svg{max-width:100%;max-height:396px;height:auto}
.filemeta{font-size:13px;color:var(--muted);margin-top:12px;display:none}
.filemeta.on{display:block}
.filemeta b{color:var(--ink)}
.downloads{display:none;flex-wrap:wrap;gap:10px;margin-top:14px}
.downloads.on{display:flex}
.pro-lock{opacity:.75}
section.block{padding:34px 0}
section.block h2{font-size:24px;letter-spacing:-.01em;margin:0 0 10px}
section.block h3{font-size:17px;margin:22px 0 6px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:16px}
.step{padding:18px}
.step .n{display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;align-items:center;justify-content:center;margin-bottom:8px}
.step h3{margin:0 0 6px;font-size:16px}
.step p{margin:0;color:var(--muted);font-size:14px}
.faq details{border:1px solid var(--line);border-radius:10px;background:#fff;padding:14px 16px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;font-size:15px}
.faq p{margin:8px 0 0;color:var(--muted);font-size:14px}
.pricing{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:16px}
.plan{padding:22px}
.plan h3{margin:0 0 4px;font-size:18px}
.plan .price{font-size:32px;font-weight:800;margin:6px 0}
.plan .price span{font-size:14px;color:var(--muted);font-weight:400}
.plan ul{margin:12px 0;padding-left:20px;color:var(--muted);font-size:14px}
.plan ul li{margin-bottom:6px}
.plan.featured{border:2px solid var(--pro)}
footer.site{border-top:1px solid var(--line);padding:26px 0 40px;margin-top:20px;color:var(--muted);font-size:13px}
footer.site .cols{display:flex;flex-wrap:wrap;gap:8px 26px}
.modal-back{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal-back.on{display:flex}
.modal{background:#fff;border-radius:16px;max-width:440px;width:100%;padding:26px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.modal h3{margin:0 0 6px;font-size:20px}
.modal p{color:var(--muted);font-size:14px;margin:6px 0 14px}
.modal ul{margin:0 0 16px;padding-left:20px;font-size:14px;color:var(--muted)}
.modal ul li{margin-bottom:6px}
.modal .row{display:flex;gap:8px}
.modal input[type=email]{flex:1;padding:11px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px}
.modal .close-x{float:right;border:0;background:none;font-size:20px;cursor:pointer;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#171717;color:#fff;padding:11px 18px;border-radius:10px;font-size:14px;display:none;z-index:60;box-shadow:0 8px 24px rgba(0,0,0,.3)}
.toast.on{display:block}
.spinner{display:inline-block;width:15px;height:15px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;vertical-align:-2px;margin-right:7px}
@keyframes spin{to{transform:rotate(360deg)}}
.landing-intro{font-size:16px;color:var(--muted);max-width:760px}
.linklist{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:14px;margin-top:10px}
@media (max-width:640px){
  .previews{grid-template-columns:1fr}
  .converter{padding:16px}
  .hero{padding:30px 0 4px}
  nav.main{display:none}
}
/* Embed mode (?embed=1): show only the converter, used inside landing-page iframes */
body.embed header.site,body.embed .hero,body.embed section.block,body.embed footer.site{display:none}
body.embed .converter{margin:0;box-shadow:none;border:0}
body.embed{background:#fff}