:root{
  --bg:#0b1020;
  --panel:rgba(255,255,255,.08);
  --panel2:rgba(255,255,255,.12);
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.72);
  --line:rgba(255,255,255,.14);
  --radius:16px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text)}
body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
header{position:sticky;top:16px;margin:16px;z-index:10;display:flex;justify-content:center;pointer-events:none}
.panel{pointer-events:auto;width:min(1060px,calc(100vw - 32px));background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px;backdrop-filter:blur(10px)}
.top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
h1{margin:0;font-size:18px;letter-spacing:.2px}
.sub{margin:4px 0 0;color:var(--muted);font-size:13px;line-height:1.35;max-width:78ch}
.controls{margin-top:10px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{border:1px solid var(--line);background:rgba(0,0,0,.22);color:var(--text);padding:10px 12px;border-radius:12px;cursor:pointer;font-size:14px}
.btn:hover{background:rgba(255,255,255,.1)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.url{flex:1;min-width:240px;padding:10px;border-radius:12px;border:1px solid var(--line);background:rgba(0,0,0,.22);color:var(--text);outline:none}
.status{margin-top:10px;font-size:12px;color:var(--muted);white-space:pre-wrap;line-height:1.35}
.log{display:none;margin-top:10px;border:1px solid var(--line);border-radius:12px;background:rgba(0,0,0,.25);padding:10px;max-height:240px;overflow:auto;font-size:12px;color:rgba(255,255,255,.8);white-space:pre-wrap;line-height:1.35}

main{padding:126px 16px 24px;display:flex;justify-content:center}
.stack{width:min(1060px,100%);display:grid;gap:14px}
.stage{background:rgba(0,0,0,.35);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:none}
.stageTop{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.2)}
.decode{padding:4px 8px;border:1px solid var(--line);border-radius:10px;background:rgba(0,0,0,.2);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:12px;color:var(--muted)}
.viewport{position:relative;background:#000;display:flex;align-items:center;justify-content:center;min-height:420px}
.viewport canvas,.viewport img{max-width:100%;max-height:80vh;height:auto;width:auto;display:block}
.viewport.bg-checker{
  background:
    linear-gradient(45deg, rgba(255,255,255,.1) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,.1) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,.1) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,.1) 75%);
  background-size:24px 24px;
  background-position:0 0,0 12px,12px -12px,-12px 0;
}
.viewport.bg-white{background:#fff}
.metadata{display:none;background:linear-gradient(180deg,rgba(0,0,0,.2),rgba(0,0,0,.3));border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.metadata h2{margin:0 0 10px;font-size:16px}
.metaGrid{display:grid;grid-template-columns:minmax(140px,220px) 1fr;gap:8px 12px}
.metaGrid dt{color:var(--muted);font-size:13px}
.metaGrid dd{margin:0;font-size:13px;line-height:1.35;word-break:break-word}

.footerCard{background:linear-gradient(180deg,rgba(0,0,0,.16),rgba(0,0,0,.28));border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.footerCard h2{margin:0 0 8px;font-size:16px}
.footerCard p{margin:8px 0;color:var(--muted);line-height:1.42;font-size:13px}
.footerCard details{margin-top:8px;border-top:1px solid rgba(255,255,255,.08);padding-top:8px}
.footerCard summary{cursor:pointer;font-size:13px;color:var(--text)}
.footerCard details p{margin:8px 0 0}

#dropOverlay{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:30}
#dropOverlay.active{display:flex}
.dropCard{border:2px dashed rgba(255,255,255,.4);padding:24px;border-radius:20px;background:rgba(0,0,0,.4);text-align:center;width:min(580px,calc(100vw - 60px))}
.dropCard p{margin:0;color:rgba(255,255,255,.78)}

@media (max-width:700px){
  .panel{padding:10px}
  .controls{gap:8px}
  .btn{padding:9px 10px}
  .url{min-width:100%}
  main{padding:126px 12px 20px}
  .viewport{min-height:300px}
  .metaGrid{grid-template-columns:1fr}
}