html,body{height:100%;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:#ffffff;color:#000000}
.container{max-width:980px;margin:24px auto;padding:16px}
h1{font-size:clamp(20px,2.6vw,30px);margin:0 0 14px}
.h2{margin:6px 0 12px;font-size:18px}
.mt16{margin-top:16px}
.mt8{margin-top:8px}
.grid{display:grid;gap:16px;grid-template-columns:1fr 340px}
@media (max-width:960px){.grid{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,rgba(0,0,0,.06),rgba(0,0,0,.03));border:1px solid rgba(0,0,0,.08);border-radius:14px;padding:14px}
.drop{position:relative;border:1px dashed rgba(0,0,0,.25);border-radius:12px;min-height:120px;display:grid;place-items:center;text-align:center}
.drop.dragover{outline:3px solid rgba(34,211,238,.35)}
.drop input{position:absolute;inset:0;opacity:0;cursor:pointer}
.title{font-size:18px;font-weight:700}
.btn{appearance:none;border:1px solid rgba(0,0,0,.15);background:rgba(0,0,0,.08);color:#000000;padding:8px 12px;border-radius:10px;font-weight:600;cursor:pointer}
.btn.primary{border-color:transparent;background:linear-gradient(90deg,#22d3ee,#a78bfa);color:#0a0a0a}
.label{font-size:13px;color:#000000}
.hint{font-size:12px;color:#93a3b8}
.canwrap{border:1px solid rgba(255,255,255,.1);border-radius:12px;overflow:auto;background:#0b0b0b;margin-top:10px}
canvas{display:block;max-width:100%;height:auto;background:
  conic-gradient(from 45deg,#222 0 90deg,#333 0 180deg,#222 0 270deg,#333 0 360deg) 0/16px 16px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.just-between{justify-content:space-between}
.align-start{align-items:flex-start}
.controls{display:grid;gap:12px}
.slider{width:100%}
fieldset{border:1px solid rgba(0,0,0,.12);border-radius:10px;padding:10px}
legend{font-size:12px;color:#93a3b8;padding:0 6px}
.ol{margin:0;padding-left:20px;line-height:1.8}
.exwrap{max-width:340px}
.lang-switch{
  position: sticky; top: 8px; display: flex; justify-content: flex-end;
  max-width: 980px; margin: 8px auto 0; padding: 0 16px; z-index: 10;
}
.lang-switch select{
  background: rgba(255,255,255,.08); color: #e5e7eb; border: 1px solid rgba(255,255,255,.2);
  border-radius: 10px; padding: 6px 10px; backdrop-filter: blur(6px);
}
.visually-hidden{ position:absolute!important; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }