:root{
  --bg:#ffffff;
  --fg:#000000;
  --muted:#555555;
  --line:#000000;
  --soft:#f2f2f2;
  --radius:4px;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#000000; --fg:#ffffff; --muted:#aaaaaa; --line:#ffffff; --soft:#161616; }
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
img{max-width:100%;display:block}
a{color:var(--fg)}

.skip-link{position:absolute;left:-999px;top:0;background:var(--fg);color:var(--bg);padding:10px}
.skip-link:focus{left:0;z-index:10}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* Header */
.site-header{border-bottom:2px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:60px}
.logo{font-weight:800;font-size:20px;text-decoration:none;letter-spacing:-.5px}
.logo span{margin:0 2px}
.site-header nav a{margin-left:18px;text-decoration:none;font-size:14px;font-weight:600}

/* Hero */
.hero{padding:38px 20px 18px;text-align:center}
h1{font-size:clamp(28px,7vw,42px);line-height:1.15;margin:0 0 14px;letter-spacing:-1px}
.lead{font-size:17px;color:var(--muted);max-width:560px;margin:0 auto}

/* Tool */
.tool{padding:8px 20px 24px}
.dropzone{
  border:2px dashed var(--line);
  border-radius:var(--radius);
  padding:38px 20px;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  text-align:center;cursor:pointer;
  transition:background .15s;
}
.dropzone:hover,.dropzone:focus,.dropzone.drag{background:var(--soft);outline:none}
.dropzone strong{font-size:18px}
.dropzone span{font-size:14px;color:var(--muted)}

.controls{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.control{flex:1 1 140px;display:flex;flex-direction:column;gap:4px}
.control label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px}
select{
  appearance:none;width:100%;padding:11px 12px;font-size:15px;
  background:var(--bg);color:var(--fg);
  border:2px solid var(--line);border-radius:var(--radius);
}

.thumbs{list-style:none;margin:18px 0 0;padding:0;display:grid;
  grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.thumb{position:relative;border:2px solid var(--line);border-radius:var(--radius);overflow:hidden;aspect-ratio:1;background:var(--soft);cursor:grab}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb .num{position:absolute;top:4px;left:4px;background:var(--fg);color:var(--bg);font-size:11px;font-weight:700;padding:1px 6px;border-radius:2px}
.thumb .del{position:absolute;top:4px;right:4px;width:24px;height:24px;border:none;border-radius:2px;
  background:var(--fg);color:var(--bg);font-size:15px;line-height:1;cursor:pointer;font-weight:700}
.thumb.dragging{opacity:.4}

.actions{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}
.btn{font-size:16px;font-weight:700;padding:14px 22px;border-radius:var(--radius);cursor:pointer;border:2px solid var(--line)}
.btn-primary{background:var(--fg);color:var(--bg);flex:1 1 auto;min-width:180px}
.btn-primary:disabled{opacity:.45;cursor:not-allowed}
.btn-ghost{background:var(--bg);color:var(--fg)}
.status{margin-top:14px;font-size:14px;color:var(--muted);min-height:1.2em}

/* Ad slot */
/* Content */
.content{padding:30px 20px}
.content h2{font-size:24px;margin:0 0 16px;letter-spacing:-.5px;border-bottom:2px solid var(--line);padding-bottom:8px}
.steps{margin:0;padding-left:22px}
.steps li{margin-bottom:12px}
.features{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:560px){.features{grid-template-columns:1fr 1fr}}
.feature h3{margin:0 0 6px;font-size:17px}
.feature p{margin:0;color:var(--muted);font-size:15px}

details{border:2px solid var(--line);border-radius:var(--radius);margin-bottom:10px;padding:0 16px}
summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;font-weight:700}
details[open] summary::after{content:"–"}
details p{margin:0 0 14px;color:var(--muted)}

/* Footer */
.site-footer{border-top:2px solid var(--line);margin-top:20px;padding:24px 0}
.site-footer .wrap{display:flex;flex-direction:column;gap:12px;align-items:center;text-align:center}
.site-footer p{margin:0;font-size:13px;color:var(--muted)}
.site-footer .project-of{font-weight:600}
.site-footer .project-of a{color:var(--fg)}
.site-footer nav a{margin:0 8px;font-size:13px;text-decoration:none;font-weight:600}