*{box-sizing:border-box}html,body{margin:0;padding:0}
:root{
  --bg:#fafafa; --text:#111; --muted:#666; --card:#fff; --border:#ddd; --accent:#111;
}
body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial,sans-serif}
.topbar{position:sticky;top:0;z-index:10;display:flex;gap:12px;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--border);padding:10px 16px}
.brand{font-weight:900;letter-spacing:-0.02em}
.actions{display:flex;gap:8px;align-items:center}
.actions button,.file-btn{border:1px solid var(--border);background:#fff;padding:8px 10px;border-radius:10px;cursor:pointer;font-weight:500}
.file-btn{position:relative;overflow:hidden}
.file-btn input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}
.layout{display:grid;grid-template-columns:320px 1fr;gap:16px;max-width:1200px;margin:0 auto;padding:16px}
.sidebar{display:grid;gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:0 2px 8px rgba(0,0,0,0.03);padding:12px}
.card.small{padding:10px}
h3{margin:6px 0 10px 0;font-size:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.grid2 button{border:1px solid var(--border);border-radius:10px;background:#fff;padding:8px;cursor:pointer}
.grid2 button.active,.grid2 button:hover{background:#f2f2f2}
.bg-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.thumb{border:1px solid var(--border);border-radius:10px;background:#fff;cursor:pointer;overflow:hidden;display:flex;flex-direction:column;align-items:stretch}
.thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.thumb span{font-size:12px;padding:6px;border-top:1px solid var(--border);text-align:left}
.muted{color:var(--muted);margin:0}
.editor-wrap{background:#fff;border:1px solid var(--border);border-radius:16px;padding:12px}
.editor{display:grid;gap:10px}
.editor.cols-1{grid-template-columns:1fr}
.editor.cols-2{grid-template-columns:1fr 1fr}
.editor.cols-3{grid-template-columns:1fr 1fr 1fr}
.editor.rows-1 .panel{height:520px}
.editor.rows-2 .panel{height:360px}
.panel{position:relative;border:2px solid #111;border-radius:8px;background:#fff;overflow:hidden}
.panel .canvas{position:absolute;inset:0;background-size:cover;background-position:center}
.panel .overlay{position:absolute;inset:0}
.panel.selected{outline:3px solid #111;outline-offset:2px}
.entity{position:absolute;user-select:none;touch-action:none}
.entity.char{width:120px;height:180px;border-radius:8px;background:linear-gradient(#111,#333);}
.entity.char::after{content:"";position:absolute;left:8px;top:8px;width:24px;height:24px;border-radius:50%;background:#ffd7b5;box-shadow:30px 0 0 0 #ffd7b5, 15px 22px 0 0 #2f2f2f}
.entity.bubble{padding:6px 8px;border-radius:12px;background:#fff;border:1px solid var(--border);min-width:120px;max-width:240px}
.entity.bubble[contenteditable]:focus{outline:2px solid #111}
.footer{max-width:1200px;margin:8px auto 40px auto;padding:0 16px;color:#777}
@media (max-width: 900px){
  .layout{grid-template-columns:1fr}
  .editor.rows-2 .panel{height:240px}
}