.grv-wrap{ position:relative; border:1px solid #e5e7eb; border-radius:16px; overflow:hidden; background:#fff; box-shadow:0 6px 24px rgba(0,0,0,.06); height:var(--grv-h,720px); }
.grv-stage{ height:100%; width:100%; display:flex; align-items:center; justify-content:center; background:#f8fafc; position:relative; }
.grv-canvas{ display:block; max-width:100%; height:auto; image-rendering:auto; }

.grv-toolbar{ position:absolute; top:10px; right:10px; display:flex; gap:8px; z-index:5; backdrop-filter:saturate(150%) blur(6px); background:rgba(255,255,255,.75); border:1px solid rgba(0,0,0,.06); padding:6px; border-radius:999px; }
.grv-btn{ -webkit-appearance:none; appearance:none; border:none; cursor:pointer; font-size:18px; line-height:1; padding:8px 10px; border-radius:999px; background:#111827; color:#fff; box-shadow:0 2px 8px rgba(0,0,0,.15); }
.grv-btn:active{ transform:scale(.98); }

.grv-wrap, .grv-wrap *{ user-select:none; -webkit-user-drag:none; }

.grv-error{ color:#b91c1c; font-weight:600; }

.grv-msg{ position:absolute; inset:auto 16px 16px 16px; background:#111827; color:#fff; padding:10px 12px; border-radius:12px; font-size:14px; line-height:1.4; box-shadow:0 4px 18px rgba(0,0,0,.18); }