:root{
  --bg:#f3f6fb;--surface:#fff;--ink:#14213d;--mute:#56627a;--line:#dbe2ef;
  --acc:#d92d20;--acc-d:#b42318;--acc-soft:#fee4e2;
  --c-org:#2459d6;--c-cnv:#0e8f7e;--c-opt:#d92d20;--c-ins:#b7791f;--c-edt:#7a3fd1;
  --focus:#ffbf1f;--r:10px;
  --font:"Avenir Next","Segoe UI Variable","Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0d1424;--surface:#152038;--ink:#eaf0ff;--mute:#a3b0cc;--line:#26345a;--acc-soft:#3b1a1a}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;font:16px/1.65 var(--font);background:var(--bg);color:var(--ink);-webkit-text-size-adjust:100%}
img,svg{max-width:100%}
a{color:var(--c-org);text-underline-offset:3px}
@media (prefers-color-scheme:dark){a{color:#8fb2ff}}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--bg);padding:8px 14px;z-index:100}
.skip:focus{left:8px}

/* header */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.2rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.brand svg{width:32px;height:32px;flex:none}
.brand b{color:var(--acc)}
#nav{display:flex;gap:4px;align-items:center}
#nav a{color:var(--ink);text-decoration:none;padding:8px 12px;border-radius:8px;font-weight:600;font-size:.95rem}
#nav a:hover,#nav a[aria-current=page]{background:var(--bg)}
#nav a.cta{background:var(--acc);color:#fff}
#nav a.cta:hover{background:var(--acc-d)}
#navToggle{display:none;background:none;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:8px 12px;font:inherit;font-weight:600;cursor:pointer}
@media (max-width:760px){
  #navToggle{display:block}
  #nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 16px}
  #nav.open{display:flex}
  .bar{position:relative}
}

/* headings */
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(1.7rem,4vw,2.5rem);font-weight:800}
h2{font-size:clamp(1.35rem,2.6vw,1.8rem);font-weight:800}
h3{font-size:1.1rem;font-weight:700}
p{margin:0 0 1em;max-width:72ch}
.lead{color:var(--mute);font-size:1.08rem;max-width:62ch}

/* home: tools come first */
.intro{padding:28px 0 8px}
.intro h1{margin-bottom:.25em}
.intro p{margin:0}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding:18px 0 36px;margin:0;list-style:none}
@media (max-width:980px){.grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:720px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:440px){.grid{grid-template-columns:1fr}}
.tile{display:flex;flex-direction:column;gap:4px;height:100%;background:var(--surface);border:1px solid var(--line);border-top:5px solid var(--tc,var(--acc));border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink);transition:transform .15s,box-shadow .15s,border-color .15s}
.tile:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(20,33,61,.12)}
.tile .ico{font-size:1.9rem;line-height:1}
.tile strong{font-size:1.05rem;margin-top:6px}
.tile span.d{color:var(--mute);font-size:.9rem;line-height:1.45}
.k-org{--tc:var(--c-org)}.k-cnv{--tc:var(--c-cnv)}.k-opt{--tc:var(--c-opt)}.k-ins{--tc:var(--c-ins)}.k-edt{--tc:var(--c-edt)}

/* tool workspace */
.crumbs{font-size:.88rem;color:var(--mute);padding:16px 0 0}
.crumbs a{color:var(--mute)}
.tool-head{padding:8px 0 16px}
.tool-head h1{margin-bottom:.2em}
.workspace{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:28px;box-shadow:0 8px 28px rgba(20,33,61,.08)}
.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center;min-height:230px;padding:28px 16px;border:3px dashed var(--tc,var(--acc));border-radius:12px;background:var(--bg);cursor:pointer;transition:background .15s,border-color .15s}
.dropzone:hover,.dropzone.over{background:var(--acc-soft);border-style:solid}
.dropzone .big{font-size:2.6rem;line-height:1}
.dropzone strong{font-size:1.2rem}
.dropzone small{color:var(--mute)}
.btn{display:inline-block;border:0;border-radius:9px;background:var(--acc);color:#fff;font:inherit;font-weight:700;padding:12px 22px;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--acc-d)}
.btn:disabled{opacity:.55;cursor:wait}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--bg)}
.has-files .dropzone{min-height:110px;padding:14px}
.has-files .dropzone .big{display:none}
#panel{display:none;margin-top:16px}
.has-files #panel{display:block}
.files{list-style:none;margin:0 0 14px;padding:0;display:grid;gap:8px}
.files li{display:flex;align-items:center;gap:10px;background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:8px 12px}
.files .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}
.files .sz{color:var(--mute);font-size:.85rem;white-space:nowrap}
.files button{background:none;border:1px solid var(--line);color:var(--ink);border-radius:6px;width:32px;height:32px;cursor:pointer;font:inherit}
.files button:hover{background:var(--surface)}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:16px}
.opts label{display:block;font-weight:600;font-size:.92rem}
.opts input,.opts select{display:block;width:100%;margin-top:5px;padding:10px 12px;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px}
.opts .hint{font-weight:400;color:var(--mute);font-size:.82rem}
.actions{display:flex;flex-wrap:wrap;gap:10px}
.progress{height:6px;background:var(--line);border-radius:6px;overflow:hidden;margin-top:14px;display:none}
.progress i{display:block;height:100%;width:0;background:var(--acc);transition:width .2s}
#status{margin-top:12px;font-weight:600;min-height:1.4em}
#status.err{color:var(--acc)}
#status.ok{color:var(--c-cnv)}
.done{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:14px;padding:14px;border-radius:10px;background:var(--bg);border:1px solid var(--c-cnv)}
.info{width:100%;border-collapse:collapse;margin-top:14px;font-size:.95rem}
.info th,.info td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top;word-break:break-word}
.info th{width:34%;color:var(--mute);font-weight:600}
.res-file{margin-top:16px}
.res-file h3{margin-bottom:.3em}
.pill{display:inline-block;background:var(--acc-soft);color:var(--acc);font-weight:800;border-radius:99px;padding:2px 12px}
.privacy-note{color:var(--mute);font-size:.88rem;margin:12px 0 0}

/* content sections */
section.block{padding:30px 0;border-top:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:16px 0 0;padding:0;list-style:none;counter-reset:s}
@media (max-width:760px){.steps{grid-template-columns:1fr}}
.steps li{counter-increment:s;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 16px 60px;position:relative}
.steps li::before{content:counter(s);position:absolute;left:14px;top:14px;width:34px;height:34px;border-radius:50%;background:var(--acc);color:#fff;font-weight:800;display:grid;place-items:center}
.steps strong{display:block}
.steps span{color:var(--mute);font-size:.95rem}
.guide h3{margin-top:1.4em}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);margin-bottom:10px;padding:0 16px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--acc)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{color:var(--mute)}
.related{display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:0;list-style:none}
.related a{display:inline-block;padding:8px 14px;border:1px solid var(--line);border-radius:99px;background:var(--surface);text-decoration:none;font-weight:600;color:var(--ink)}
.related a:hover{border-color:var(--acc)}
.ad{margin:22px auto;text-align:center;min-height:90px;overflow:hidden}
.prose{padding:28px 0 40px}
.prose h2{margin-top:1.6em}
.prose ul{padding-left:1.2em;max-width:72ch}

/* footer */
.site-footer{background:var(--ink);color:#c9d3ec;margin-top:40px;padding:36px 0 24px}
@media (prefers-color-scheme:dark){.site-footer{background:#0a101d}}
.site-footer a{color:#e6ecff}
.fcols{display:grid;grid-template-columns:1.4fr 2fr 1fr;gap:28px}
@media (max-width:820px){.fcols{grid-template-columns:1fr}}
.site-footer h2{font-size:1rem;color:#fff;margin-bottom:.6em}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:4px 0}
.site-footer .two{columns:2}
.copy{border-top:1px solid #2c3a5e;margin-top:24px;padding-top:16px;font-size:.88rem}
.err{color:var(--acc);font-weight:600}