:root{
  --bg:#0e1014; --panel:#161a21; --panel2:#1d222b; --line:#272d38;
  --fg:#eef1f6; --muted:#a3abbb; --dim:#79818f;
  --acc:#5b8cff; --acc2:#3d6ee0;
  --ok:#3ecf8e; --warn:#e8b04b; --err:#f3676c;
  --r:10px;
}
*{box-sizing:border-box}
/* .btn sets display:inline-flex, which would override the default
   display:none that the [hidden] attribute carries. */
[hidden]{display:none!important}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  display:flex; flex-direction:column;
}
button,input,textarea,select{font:inherit;color:inherit}
/* Interactive elements only. A bare :focus-visible lets Chrome give focus to
   scrollable regions (overflow:auto) and draw a ring around the whole metadata
   block. */
a:focus-visible,button:focus-visible,input:focus-visible,
textarea:focus-visible,select:focus-visible,summary:focus-visible,
[tabindex]:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
[tabindex="-1"]:focus,div:focus{outline:none}

/* Scrollbars that suit a dark theme; Chrome's default is glaring white. */
*{scrollbar-width:thin;scrollbar-color:#39414f transparent}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#39414f;border-radius:99px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:#4a5464;background-clip:content-box}

/* ---------------------------------------------------------------- topbar */
.topbar{
  display:flex; align-items:center; gap:18px; padding:10px 16px;
  background:var(--panel); border-bottom:1px solid var(--line); flex:none;
}
.brand strong{font-size:16px;letter-spacing:.2px}
.brand .sub{color:var(--dim); font-size:11px; margin-left:8px}
.engine{display:flex;align-items:center;gap:9px;margin-left:auto}
.engine-text{font-weight:600}
.engine-sub{color:var(--muted);font-size:12px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--dim);flex:none}
.dot.stopped{background:var(--dim)}
.dot.starting,.dot.stopping{background:var(--warn);animation:pulse 1.1s infinite}
.dot.ready{background:var(--ok)}
.dot.busy{background:var(--acc);animation:pulse 1.1s infinite}
.dot.error{background:var(--err)}
@keyframes pulse{50%{opacity:.25}}
.engine-actions{display:flex;align-items:center;gap:10px}
.idle-field{color:var(--muted);font-size:12px;display:flex;align-items:center;gap:5px;white-space:nowrap}
.engine-actions{flex:none}
.topbar{flex-wrap:wrap}
.idle-field input{width:48px;padding:3px 6px;background:var(--panel2);border:1px solid var(--line);border-radius:6px;text-align:center}

/* ----------------------------------------------------------------- main */
main{flex:1; display:grid; grid-template-columns:360px 1fr; gap:14px; padding:14px; overflow:hidden}
.col{display:flex;flex-direction:column;gap:12px;min-height:0}
.controls{overflow-y:auto; padding-right:4px}
.results{overflow:hidden}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:12px}
.lbl{font-size:11px;text-transform:uppercase;letter-spacing:.7px;color:var(--muted);margin-bottom:8px;font-weight:600}
.mini{font-size:11px;color:var(--muted);display:block;margin-bottom:4px}
.mini b{color:var(--fg)}
.muted{color:var(--muted)}
.hint{font-size:11px;color:var(--dim);margin-top:7px;line-height:1.45}

/* Parameter help, hidden behind a ? so the control panel stays uncluttered */
.help-t{
  background:transparent;border:1px solid var(--line);color:var(--muted);
  width:17px;height:17px;border-radius:50%;font-size:11px;line-height:1;
  cursor:pointer;padding:0;margin-left:6px;vertical-align:middle;
}
.help-t:hover,.help-t.on{border-color:var(--acc);color:var(--acc)}
.help{
  margin:0 0 10px;padding:10px 11px;background:var(--panel2);
  border:1px solid var(--line);border-left:2px solid var(--acc);border-radius:0 8px 8px 0;
  font-size:12.5px;line-height:1.65;color:var(--fg);text-transform:none;letter-spacing:normal;font-weight:400;
}
.help b{color:#fff}

.guide{padding:0}
.guide summary{
  cursor:pointer;padding:12px;font-weight:600;font-size:13.5px;list-style:none;
  display:flex;align-items:center;gap:8px;
}
.guide summary::-webkit-details-marker{display:none}
.guide summary::before{content:'💡';font-size:15px}
.guide summary::after{content:'▾';margin-left:auto;color:var(--muted);transition:.15s}
.guide[open] summary::after{transform:rotate(180deg)}
.guide[open] summary{border-bottom:1px solid var(--line)}
.guide ol{margin:0;padding:12px 12px 0 30px;font-size:12.5px;line-height:1.7;color:var(--fg)}
.guide ol li{margin-bottom:7px}
.guide ol b{color:#fff}
.guide-note{margin:4px 12px 12px;padding-top:10px;border-top:1px solid var(--line);
  font-size:11.5px;line-height:1.6;color:var(--muted)}
.row{display:flex;gap:8px;align-items:flex-end;margin-top:9px}
.grow{flex:1;display:block}

textarea,input[type=number],input[type=text]{
  width:100%;background:var(--panel2);border:1px solid var(--line);
  border-radius:8px;padding:8px 10px;resize:vertical;outline:none;
}
textarea:focus,input:focus{border-color:var(--acc)}
input[type=range]{width:100%;accent-color:var(--acc)}
.neg{margin-top:9px}
.neg summary{cursor:pointer;font-size:12px;color:var(--muted);user-select:none}
.neg textarea{margin-top:7px}

/* --------------------------------------------------------------- buttons */
.btn{
  /* Must set a color: without it <a class="btn"> picks up the browser's
     default link blue, which is nearly unreadable on a dark background. */
  color:var(--fg);
  background:var(--panel2);border:1px solid var(--line);border-radius:8px;
  padding:7px 12px;cursor:pointer;text-decoration:none;display:inline-flex;
  align-items:center;justify-content:center;gap:6px;transition:.12s;white-space:nowrap;
}
.btn:hover:not(:disabled){border-color:var(--acc);background:#232936}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#fff;font-weight:600}
.btn.primary:hover:not(:disabled){background:var(--acc2)}
.btn.danger{background:#3a1d20;border-color:#5c2a2f;color:#ffb4b7}
.btn.danger:hover:not(:disabled){border-color:var(--err)}
.btn.ghost{background:transparent}
.btn.big{flex:1;padding:11px;font-size:15px}
.btn.tiny{padding:5px 8px;font-size:12px}
.actions{display:flex;gap:8px}
.eta{text-align:center;font-size:12px;color:var(--muted);min-height:17px}

/* --------------------------------------------------------------- presets */
.presets{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.preset{
  background:var(--panel2);border:1px solid var(--line);border-radius:8px;
  padding:8px 6px;cursor:pointer;text-align:center;transition:.12s;
}
.preset:hover{border-color:var(--acc)}
.preset.on{border-color:var(--acc);background:#1c2436;box-shadow:inset 0 0 0 1px var(--acc)}
.preset .pname{font-weight:600;font-size:13px}
.preset .pstate{font-size:10px;color:var(--muted);margin-top:2px}
.preset .pstate.need{color:var(--warn)}
.preset .pstate.ok{color:var(--ok)}
.preset-note{font-size:11px;color:var(--dim);margin-top:8px;line-height:1.45}
.dl{margin-top:9px}
.dl-text{font-size:11px;color:var(--muted);margin:5px 0}

/* ------------------------------------------------------------ input imgs */
.drop{
  border:1.5px dashed var(--line);border-radius:9px;padding:14px 10px;
  text-align:center;transition:.15s;cursor:pointer;
}
.drop:hover,.drop.over{border-color:var(--acc);background:#1a2131}
.drop-in{display:flex;flex-direction:column;gap:8px;align-items:center}
.drop-in>span{font-size:12px;color:var(--muted)}
.drop-btns{display:flex;gap:6px}

.thumbs{display:flex;flex-wrap:wrap;gap:7px;margin-top:9px}
.thumbs:empty{margin-top:0}
.thumb-in{
  position:relative;width:74px;border-radius:8px;overflow:hidden;
  border:1px solid var(--line);background:var(--panel2);
}
.thumb-in.init{border-color:var(--warn);box-shadow:inset 0 0 0 1px var(--warn)}
.thumb-in img{width:100%;height:74px;object-fit:cover;display:block}
.thumb-in .idx{
  position:absolute;top:3px;left:3px;background:rgba(0,0,0,.78);
  border-radius:5px;padding:1px 6px;font-size:10.5px;font-weight:700;
}
.thumb-in.init .idx{background:var(--warn);color:#1a1204}
.thumb-in .x{
  position:absolute;top:3px;right:3px;width:19px;height:19px;padding:0;
  border-radius:5px;background:rgba(0,0,0,.78);border:none;color:#fff;
  font-size:12px;line-height:19px;cursor:pointer;
}
.thumb-in .x:hover{background:var(--err)}
.thumb-in .role{
  width:100%;border:none;border-top:1px solid var(--line);border-radius:0;
  background:var(--panel2);font-size:10px;padding:3px 2px;cursor:pointer;color:var(--muted);
}
.thumb-in .role:hover{color:var(--acc)}
.strength{margin-top:11px;display:block}

/* --------------------------------------------------------------- picker */
.picker{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:14px;width:min(92vw,760px);max-height:88vh;display:flex;flex-direction:column;gap:10px;
}
.picker-head{display:flex;justify-content:space-between;align-items:center}
.picker-head .lbl{margin:0}
.picker-grid{
  overflow-y:auto;display:grid;gap:9px;
  grid-template-columns:repeat(auto-fill,minmax(118px,1fr));align-content:start;
}
.picker-grid img{
  width:100%;aspect-ratio:1;object-fit:cover;border-radius:8px;cursor:pointer;
  border:1px solid var(--line);transition:.12s;display:block;
}
.picker-grid img:hover{border-color:var(--acc);transform:scale(1.03)}

/* ---------------------------------------------------------------- ratios */
.ratios{display:flex;flex-wrap:wrap;gap:5px}
.ratio{
  background:var(--panel2);border:1px solid var(--line);border-radius:7px;
  padding:5px 9px;cursor:pointer;font-size:12px;transition:.12s
}
.ratio:hover{border-color:var(--acc)}
.ratio.on{border-color:var(--acc);color:#fff;background:#1c2436}
.wh label{flex:1}
.wh .times{color:var(--dim);padding-bottom:9px}
.wh input{text-align:center}
.wh input:disabled{opacity:.65}

/* --------------------------------------------------------------- formats */
.formats{display:flex;gap:6px}
.fmt{
  flex:1;background:var(--panel2);border:1px solid var(--line);border-radius:8px;
  padding:7px;cursor:pointer;text-align:center;font-size:13px;transition:.12s
}
.fmt:hover{border-color:var(--acc)}
.fmt.on{border-color:var(--acc);background:#1c2436}
.quality{display:block;margin-top:10px}
.quality.off{opacity:.35;pointer-events:none}
.seedrow input{flex:1}

/* -------------------------------------------------------------- progress */
.bar{height:7px;background:var(--panel2);border-radius:99px;overflow:hidden}
.bar-fill{height:100%;width:0;background:linear-gradient(90deg,var(--acc2),var(--acc));transition:width .3s}
.bar-fill.indet{
  width:35%!important;
  animation:slide 1.3s ease-in-out infinite;
  background:linear-gradient(90deg,transparent,var(--acc),transparent);
}
@keyframes slide{0%{margin-left:-35%}100%{margin-left:100%}}
.progress-card{flex:none}
.progress-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px;gap:10px}
.progress-head span:first-child{font-weight:600}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--muted)}

/* ------------------------------------------------------------------- log */
.log-card{flex:none;display:flex;flex-direction:column;min-height:0}
.log-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.log-head .lbl{margin:0}
.log-actions{display:flex;gap:6px;align-items:center}
.log{
  height:170px;overflow-y:auto;background:#0b0d11;border:1px solid var(--line);
  border-radius:8px;padding:8px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:11.5px;line-height:1.55;
}
.log div{white-space:pre-wrap;word-break:break-word;display:flex;gap:7px}
.log .t{color:var(--dim);flex:none}
.log .s{color:var(--dim);flex:none}
.log .m{flex:1}
.log .lv-info .m{color:#c3cad6}
.log .lv-debug .m{color:var(--dim)}
.log .lv-warn .m{color:var(--warn)}
.log .lv-error .m{color:var(--err)}

/* --------------------------------------------------------------- gallery */
.gallery-card{flex:1;display:flex;flex-direction:column;min-height:0}
.gallery{
  flex:1;overflow-y:auto;display:grid;gap:9px;
  grid-template-columns:repeat(auto-fill,minmax(140px,1fr));align-content:start;
}
.thumb{position:relative;border-radius:8px;overflow:hidden;background:var(--panel2);cursor:pointer;border:1px solid var(--line)}
.thumb img{width:100%;display:block;aspect-ratio:1;object-fit:cover}
.thumb .cap{
  position:absolute;left:0;right:0;bottom:0;padding:14px 7px 5px;
  background:linear-gradient(transparent,rgba(0,0,0,.88));font-size:10.5px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.thumb .badge{position:absolute;top:5px;right:5px;background:rgba(0,0,0,.7);border-radius:5px;padding:2px 5px;font-size:9.5px;text-transform:uppercase}
.thumb.new{animation:pop .35s}
@keyframes pop{from{transform:scale(.9);opacity:0}}
.empty{color:var(--dim);text-align:center;padding:26px;font-size:13px}

/* -------------------------------------------------------------- lightbox */
dialog{border:none;background:transparent;padding:0;max-width:96vw;max-height:94vh}
dialog::backdrop{background:rgba(0,0,0,.82)}
.lb{display:flex;gap:14px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;max-height:94vh}
/* align-items:flex-start + width/height auto: anh nho (vd 256px) hien dung co that,
   khong bi keo gian thanh khung cao co vien den hai dau. */
.lb img{max-width:min(62vw,820px);max-height:86vh;width:auto;height:auto;object-fit:contain;border-radius:8px}
.lb-side{width:330px;display:flex;flex-direction:column;gap:14px;min-height:0;max-height:86vh}
/* Only the metadata scrolls; the button row is pinned, otherwise "Close" gets
   pushed off screen on tall images. */
.lb-meta{display:flex;flex-direction:column;gap:14px;flex:1;min-height:0;overflow-y:auto;padding-right:4px}

/* Small dim labels, large bright values: what matters more stands out more. */
.meta-h{font-size:10.5px;letter-spacing:.9px;text-transform:uppercase;
  color:var(--dim);font-weight:700;display:flex;align-items:center;gap:8px}
.meta-h button{margin-left:auto}
.lb-meta .p{
  background:var(--panel2);border:1px solid var(--line);border-radius:8px;
  padding:10px 11px;margin-top:7px;font-size:13.5px;line-height:1.6;color:var(--fg);
  max-height:190px;overflow-y:auto;white-space:pre-wrap;word-break:break-word;
}
.meta-grid{display:grid;grid-template-columns:auto minmax(0,1fr);gap:7px 14px;
  margin-top:7px;font-size:13.5px;line-height:1.45;align-items:baseline}
.meta-grid dt{color:var(--muted);white-space:nowrap}
.meta-grid dd{margin:0;color:var(--fg);min-width:0;overflow-wrap:anywhere}
.meta-grid dd.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}
.meta-grid dd.seed{font-size:15px;font-weight:600;letter-spacing:.3px}
.meta-files{margin-top:7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:12px;line-height:1.75;color:var(--fg);overflow-wrap:anywhere}
.lb-actions{display:flex;flex-direction:column;gap:6px;flex:none;padding-top:10px;border-top:1px solid var(--line)}
.lb-actions .btn{padding:9px 12px;font-size:13.5px}

@media (max-width:900px){
  main{grid-template-columns:1fr;overflow:auto}
  .controls{overflow:visible}
  .lb{flex-direction:column}
  .lb-side{width:auto}
}

.lb-inputs{display:flex;flex-wrap:wrap;gap:6px;margin-top:7px}
.lb-inputs .thumb-in{width:62px}
.lb-inputs .thumb-in img{height:62px}

/* ----------------------------------------------------------- mask editor */
.mask-ed{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;
  display:flex;flex-direction:column;gap:11px;max-width:94vw;max-height:92vh;
}
.mask-stage{
  position:relative;line-height:0;align-self:center;border-radius:8px;overflow:hidden;
  background:#000;touch-action:none;
}
.mask-stage img{max-width:min(78vw,640px);max-height:64vh;display:block}
.mask-stage canvas{position:absolute;inset:0;width:100%;height:100%;cursor:crosshair}
.mask-tools{display:flex;flex-wrap:wrap;gap:7px;align-items:center}
.mask-tools .brush-size{display:flex;align-items:center;gap:7px;margin:0}
.mask-tools .brush-size input{width:110px}
.mask-tools .btn.on{border-color:var(--acc);background:#1c2436}
.mask-tools .btn.primary{margin-left:auto}
.thumb-in .mask-btn{
  width:100%;border:none;border-top:1px solid var(--line);border-radius:0;
  background:var(--panel2);font-size:10px;padding:3px 2px;cursor:pointer;color:var(--warn);
}
.thumb-in .mask-btn:hover{color:#fff;background:var(--warn)}
.thumb-in .mask-btn.on{background:var(--warn);color:#1a1204;font-weight:700}