:root{--g:#059669;--g2:#0d9488;--gd:#047857;--ink:#0f172a;--mut:#475569;--line:#e2e8f0;--bg:#f8fafc;--card:#fff;--r:16px;--sh:0 1px 2px rgba(15,23,42,.05),0 8px 24px rgba(15,23,42,.06)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:'Plus Jakarta Sans',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--gd);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}.narrow{max-width:820px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px 12px;z-index:99}
/* header */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd .in{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink);letter-spacing:-.02em}.logo:hover{text-decoration:none}
.logo svg{width:38px;height:38px;flex:none}.logo b{font-size:11px;letter-spacing:.12em;text-transform:uppercase;background:#d1fae5;color:#065f46;padding:2px 7px;border-radius:6px;margin-left:2px}
.nav{display:flex;gap:2px;margin-left:12px;flex:1}.nav a{padding:8px 11px;border-radius:10px;color:#334155;font-weight:600;font-size:14px}.nav a:hover,.nav a.on{background:#ecfdf5;color:var(--gd);text-decoration:none}
.srch{position:relative}.srch input{width:210px;padding:9px 14px;border:1px solid var(--line);border-radius:999px;font:inherit;font-size:14px;background:#f1f5f9}.srch input:focus{outline:2px solid var(--g);background:#fff}
.sres{position:absolute;right:0;top:44px;width:340px;max-height:380px;overflow:auto;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh);display:none}.sres a{display:block;padding:10px 14px;color:var(--ink);font-size:14px;border-bottom:1px solid #f1f5f9}.sres a small{display:block;color:var(--mut)}.sres a:hover{background:#ecfdf5;text-decoration:none}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:18px;cursor:pointer}
@media(max-width:900px){.burger{display:block}.nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 16px;border-bottom:1px solid var(--line);margin:0}.nav.open{display:flex}.srch{display:none}.nav.open~.srch{display:none}}
/* hero */
.hero{background:linear-gradient(135deg,#ecfdf5 0%,#f0fdfa 45%,#eff6ff 100%);border-bottom:1px solid var(--line)}
.hero .in{padding:64px 0 56px;text-align:center}.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.1;margin:0 0 14px;letter-spacing:-.03em;font-weight:800}
.hero h1 span{background:linear-gradient(90deg,var(--g),var(--g2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{max-width:720px;margin:0 auto 24px;font-size:18px;color:var(--mut)}
.btn{display:inline-block;background:linear-gradient(90deg,var(--g),var(--g2));color:#fff;padding:12px 22px;border-radius:12px;font-weight:700;border:0;cursor:pointer;font:inherit;font-weight:700;box-shadow:0 6px 16px rgba(5,150,105,.25)}.btn:hover{text-decoration:none;filter:brightness(1.05)}
.btn.alt{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.pills{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:22px}.pills span{background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:999px;font-size:13px;font-weight:600;color:#334155}
/* sections */
.sec{padding:52px 0}.sec.alt{background:#fff;border-block:1px solid var(--line)}.sec h2{font-size:30px;letter-spacing:-.02em;margin:0 0 8px}.sec .sub{color:var(--mut);margin:0 0 26px;max-width:720px}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}@media(max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh);transition:.15s}.card:hover{transform:translateY(-2px);border-color:#a7f3d0}
.tool{display:flex;gap:14px;color:var(--ink)}.tool:hover{text-decoration:none}.tool .ic{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-weight:800;color:#fff;font-size:15px}
.tool h3{margin:0 0 4px;font-size:16px}.tool p{margin:0;color:var(--mut);font-size:14px;line-height:1.5}
.cat{display:block;color:var(--ink)}.cat:hover{text-decoration:none}.cat h3{margin:10px 0 6px}.cat p{color:var(--mut);margin:0;font-size:14px}.cat .tag{display:inline-block;font-size:12px;font-weight:700;background:#ecfdf5;color:var(--gd);padding:3px 9px;border-radius:99px}
/* blog cards */
.post{padding:0;overflow:hidden;display:flex;flex-direction:column;color:var(--ink)}.post:hover{text-decoration:none}.post img{aspect-ratio:1200/630;width:100%;object-fit:cover;background:#e2e8f0}.post .b{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.post h3{margin:0;font-size:18px;line-height:1.3}.post p{margin:0;color:var(--mut);font-size:14px}.meta{font-size:12.5px;color:#64748b;display:flex;gap:10px;flex-wrap:wrap}.chip{font-size:12px;font-weight:700;color:var(--gd);background:#ecfdf5;border-radius:99px;padding:2px 10px;display:inline-block}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px}.chips button{border:1px solid var(--line);background:#fff;border-radius:99px;padding:6px 14px;font:inherit;font-size:13px;font-weight:600;cursor:pointer}.chips button.on{background:var(--g);color:#fff;border-color:var(--g)}
/* article */
.crumbs{font-size:13px;color:#64748b;padding:18px 0 4px}.crumbs a{color:#64748b}.crumbs i{margin:0 6px;font-style:normal}
.art{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(20px,4vw,48px);margin:10px 0 40px;box-shadow:var(--sh)}
.art h1{font-size:clamp(28px,4vw,42px);line-height:1.15;letter-spacing:-.025em;margin:10px 0 14px}.art .cover{border-radius:16px;margin:22px 0;width:100%;aspect-ratio:1200/630;object-fit:cover}
.prose{font-size:17.5px;color:#1e293b}.prose h2{font-size:26px;margin:2em 0 .5em;letter-spacing:-.015em;line-height:1.25}.prose h3{font-size:20px;margin:1.6em 0 .4em}.prose p{margin:0 0 1.15em}.prose ul,.prose ol{margin:0 0 1.2em 1.2em;padding-left:.8em}.prose li{margin:.3em 0}
.prose blockquote{margin:1.4em 0;padding:14px 20px;border-left:4px solid var(--g);background:#f0fdf4;border-radius:0 12px 12px 0;color:#14532d}.prose table{border-collapse:collapse;width:100%;margin:1.2em 0;font-size:15px}.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;text-align:left}.prose th{background:#f1f5f9}
.related{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:16px;padding:18px 22px;margin-top:2em}.related h3{margin:0 0 8px;font-size:17px}.related ul{margin:0;padding-left:20px}
.byline{display:flex;gap:14px;flex-wrap:wrap;font-size:14px;color:#64748b;align-items:center}
/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:10px 0}summary{cursor:pointer;font-weight:700;list-style:none}summary::-webkit-details-marker{display:none}summary:after{content:'+';float:right;font-size:20px;line-height:1;color:var(--g)}details[open] summary:after{content:'–'}details p{margin:10px 0 0;color:#334155}
/* tool pages */
.toolwrap{padding:10px 0 40px}.tool-h{text-align:center;max-width:760px;margin:10px auto 22px}.tool-h h1{font-size:clamp(28px,4vw,44px);margin:0 0 8px;letter-spacing:-.025em}.tool-h p{color:var(--mut);font-size:17px;margin:0}
.panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(18px,3vw,34px);box-shadow:var(--sh);margin-bottom:26px}
.drop{border:2px dashed #94a3b8;border-radius:16px;padding:34px 16px;text-align:center;background:#f8fafc;cursor:pointer;transition:.15s}.drop:hover,.drop.over{border-color:var(--g);background:#ecfdf5}.drop b{display:block;font-size:17px}.drop span{color:var(--mut);font-size:14px}
.row{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-end;margin:16px 0}.row label{font-size:13px;font-weight:700;color:#334155;display:block;margin-bottom:4px}
input[type=text],input[type=number],input[type=password],input[type=email],input[type=url],select,textarea{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:10px;font:inherit;background:#fff}textarea{min-height:140px}input:focus,select:focus,textarea:focus{outline:2px solid var(--g);border-color:transparent}
.note{background:#fffbeb;border:1px solid #fde68a;color:#78350f;border-radius:12px;padding:12px 16px;font-size:14px;margin:14px 0}.ok{background:#ecfdf5;border-color:#a7f3d0;color:#064e3b}.err{background:#fef2f2;border-color:#fecaca;color:#7f1d1d}
.out{white-space:pre-wrap;background:#0f172a;color:#e2e8f0;border-radius:12px;padding:16px;font:13.5px/1.55 ui-monospace,Menlo,Consolas,monospace;max-height:420px;overflow:auto}
.prog{height:8px;background:#e2e8f0;border-radius:99px;overflow:hidden;margin:12px 0}.prog i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--g),var(--g2));transition:width .2s}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-top:14px}.thumbs figure{margin:0;border:1px solid var(--line);border-radius:10px;padding:8px;font-size:12px;text-align:center}.thumbs img{border-radius:6px;margin-bottom:6px}
/* footer */
.ft{background:#0f172a;color:#cbd5e1;margin-top:40px;padding:48px 0 22px}.ft a{color:#cbd5e1}.ft .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}@media(max-width:800px){.ft .cols{grid-template-columns:1fr 1fr}}
.ft h4{color:#fff;margin:0 0 12px;font-size:14px;text-transform:uppercase;letter-spacing:.08em}.ft ul{list-style:none;margin:0;padding:0}.ft li{margin:7px 0;font-size:14px}.ft .cp{border-top:1px solid #1e293b;margin-top:30px;padding-top:18px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.ft .logo{color:#fff}.ft p{font-size:14px;margin:12px 0 0;max-width:340px}
/* cookie */
#ck{position:fixed;left:16px;right:16px;bottom:16px;max-width:620px;margin:0 auto;background:#0f172a;color:#e2e8f0;padding:16px 18px;border-radius:14px;z-index:90;display:none;gap:14px;align-items:center;box-shadow:0 10px 40px rgba(0,0,0,.35);font-size:14px}#ck a{color:#6ee7b7}#ck button{background:var(--g);color:#fff;border:0;border-radius:10px;padding:9px 16px;font-weight:700;cursor:pointer;white-space:nowrap}
.legal h2{font-size:22px;margin:1.8em 0 .4em}.legal p,.legal li{color:#1e293b}.updated{color:#64748b;font-size:14px}
/* SPA integration: hide the old SPA chrome, our static header/footer are used instead */
#root>div>nav,#root>div>header,#root>div>footer{display:none!important}#root>div{min-height:0!important}
#root .min-h-screen{min-height:0}
.ssr-fallback{max-width:760px;margin:40px auto;padding:0 20px;text-align:center}

/* ===== v4: icons, upload zone, responsive polish ===== */
html{-webkit-text-size-adjust:100%}
body{overflow-x:hidden}
img,video,canvas,svg{max-width:100%}
.tool{align-items:flex-start;min-width:0}
.tool>div{min-width:0}
.tool .ic{width:48px;height:48px;border-radius:14px;color:#fff;box-shadow:0 4px 10px rgba(15,23,42,.14)}
.tool .ic svg{width:24px;height:24px;display:block}
.tool h3,.tool p{overflow-wrap:anywhere}
.card.tool:hover .ic{transform:scale(1.06);transition:transform .15s}

/* upload / drop zone: centred icon, text and button */
.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;width:100%;min-height:210px;padding:32px 20px;text-align:center;border-radius:18px}
.drop .dz-ic{width:56px;height:56px;padding:14px;border-radius:16px;background:#d1fae5;color:var(--gd);margin-bottom:6px;transition:transform .15s}
.drop:hover .dz-ic,.drop.over .dz-ic{transform:translateY(-3px)}
.drop b{font-size:18px;line-height:1.3}
.drop span{display:block;max-width:420px}
.drop .dz-btn{font-style:normal;margin-top:12px;display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 28px;border-radius:12px;background:linear-gradient(90deg,var(--g),var(--g2));color:#fff;font-weight:700;font-size:15px;box-shadow:0 6px 16px rgba(5,150,105,.25)}
/* React tool pages: keep the Choose File label/button properly centred */
#root label[class*="cursor-pointer"]{display:inline-flex;align-items:center;justify-content:center;text-align:center;min-height:44px}
#root [class*="border-dashed"]{text-align:center}
#root button,#root .btn{touch-action:manipulation}
#root input[type=text],#root input[type=number],#root select,#root textarea{font-size:16px}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;text-align:center}
.row>*{min-width:0}
.prose{overflow-wrap:anywhere}
.prose table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
.prose img{border-radius:12px}
.post img{transition:transform .25s}.post:hover img{transform:scale(1.03)}.post{overflow:hidden}
.post .b{min-width:0}.post h3,.post p{overflow-wrap:anywhere}
.art .cover{box-shadow:0 8px 24px rgba(15,23,42,.12)}

/* tablet */
@media(max-width:900px){
  .hd .in{gap:10px;height:60px}
  .logo{font-size:18px}.logo svg{width:34px;height:34px}
  .srch{display:block;flex:1;min-width:0;margin-left:0}
  .srch input{width:100%;font-size:16px}
  .sres{position:fixed;left:12px;right:12px;top:66px;width:auto;max-height:60vh}
  .burger{margin-left:0;min-width:44px;min-height:40px}
  .nav{top:60px;max-height:calc(100vh - 60px);overflow:auto}
  .nav a{padding:12px 10px;font-size:16px}
  .nav.open~.srch{display:block}
  .hero .in{padding:44px 0 38px}
  .hero p{font-size:16.5px}
  .sec{padding:38px 0}.sec h2{font-size:26px}
}
/* phones */
@media(max-width:560px){
  .wrap,.narrow{padding:0 14px}
  .logo b{display:none}
  .hd .in{height:56px}.nav{top:56px}.sres{top:62px}
  .hero h1{font-size:30px}
  .hero .btn{display:flex;width:100%;margin:0 0 10px}
  .pills span{font-size:12px}
  .art{padding:18px 16px;border-radius:16px}
  .prose{font-size:16.5px}.prose h2{font-size:22px}
  .art .cover{margin:16px 0;border-radius:12px}
  .panel{padding:16px;border-radius:16px}
  .tool-h h1{font-size:26px}.tool-h p{font-size:15.5px}
  .drop{min-height:180px;padding:24px 14px}.drop .dz-btn{width:100%;max-width:280px}
  .row{gap:10px}.row>div{flex:1 1 100%}
  .card{padding:16px}.post{padding:0}
  .thumbs{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}
  .ft .cols{grid-template-columns:1fr}.ft .cp{flex-direction:column}
  #ck{flex-direction:column;align-items:stretch;left:10px;right:10px;bottom:10px}#ck button{width:100%;min-height:44px}
  h1[style*="font-size:38px"]{font-size:28px!important}
}
/* large desktop */
@media(min-width:1280px){
  .wrap{max-width:1240px}
  .g3{gap:22px}
}
@media(max-width:560px){.chips{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:6px;margin-right:-14px;padding-right:14px}.chips button{white-space:nowrap;flex:none}}