/* ── Simulations on the board (SimulationManager.js) ───────────────────────── */
.sim-layer { position:absolute; inset:0; pointer-events:none; z-index:6; overflow:hidden; }
.sim-frame-wrap { position:absolute; left:0; top:0; transform-origin:0 0; pointer-events:auto; border-radius:18px;
  box-shadow:0 18px 40px -22px rgba(15,23,42,.55); transition:opacity .25s ease; }
.sim-clip { position:absolute; inset:0; overflow:hidden; border-radius:inherit; background:#0f172a; }
.sim-staged { position:absolute; left:0; top:0; transform-origin:0 0; max-width:none; }
.sim-layer.sim-drawing .sim-frame-wrap { pointer-events:none; }
.sim-layer.sim-dragging .sim-frame { pointer-events:none; }
.sim-frame { display:block; width:100%; height:100%; border:0; background:transparent; }

.sim-bar { position:absolute; bottom:calc(100% + 8px); right:0; display:flex; align-items:center; gap:4px; padding:4px; border-radius:14px;
  background:rgba(15,23,42,.72); backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px); color:#fff;
  opacity:0; transform:translateY(-6px); transition:opacity .18s ease, transform .18s ease; pointer-events:auto; max-width:calc(100% - 20px); }
.sim-frame-wrap.sim-hover .sim-bar, .sim-frame-wrap:focus-within .sim-bar { opacity:1; transform:none; }
.sim-bar::after { content:''; position:absolute; left:0; right:0; top:100%; height:10px; }
@media (hover:none) { .sim-bar { opacity:.92; transform:none; } }
.sim-name { font:600 12px/1 Inter, system-ui, sans-serif; padding:0 6px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:220px; }
.sim-small .sim-name { display:none; }
.sim-btn { width:34px; height:34px; border:0; border-radius:10px; background:transparent; color:#fff; cursor:pointer; display:grid; place-items:center; font-size:14px; }
.sim-btn:hover { background:rgba(255,255,255,.16); }
.sim-btn.danger:hover { background:rgba(239,68,68,.85); }
.sim-grip { cursor:grab; touch-action:none; }
.sim-grip:active { cursor:grabbing; }
.sim-resize { position:absolute; right:-13px; bottom:-13px; width:26px; height:26px; border-radius:50%; cursor:nwse-resize; touch-action:none; opacity:0; transition:opacity .18s;
  background:#7C3AED; border:3px solid #fff; box-shadow:0 4px 12px rgba(76,29,149,.45); }
.sim-resize::after { content:''; position:absolute; inset:-10px; }
.sim-frame-wrap.sim-hover .sim-resize { opacity:1; }
@media (hover:none) { .sim-resize { opacity:.9; } }

.sim-full { position:fixed; inset:0; z-index:2147483600; background:#0b1020; animation:simIn .22s ease; }

.sim-full-bar { position:absolute; left:0; right:0; top:0; height:52px; display:flex; align-items:center; gap:12px; padding:0 10px 0 18px; background:#0b1020; border-bottom:1px solid rgba(255,255,255,.08); color:#e2e8f0; font:700 14px Inter, system-ui, sans-serif; }
.sim-full-name { display:flex; align-items:center; gap:9px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; flex:1; min-width:0; }
.sim-full-name i { color:#a78bfa; }
.sim-full-body { position:absolute; left:0; right:0; top:52px; bottom:0; }
.sim-full-close { position:relative; display:flex; align-items:center; gap:8px; height:42px; padding:0 16px; border:0; border-radius:14px;
  background:rgba(15,23,42,.78); color:#fff; font:600 14px Inter, system-ui, sans-serif; cursor:pointer; backdrop-filter:blur(10px); }
.sim-full-close:hover { background:#7C3AED; }
@keyframes simIn { from { opacity:0; transform:scale(.985); } to { opacity:1; transform:none; } }

/* ── Creator window ─────────────────────────────────────────────────────────── */
.sim-modal { position:fixed; inset:0; z-index:2147483000; display:grid; place-items:center; padding:16px; background:rgba(15,23,42,.45); backdrop-filter:blur(6px); animation:simIn .2s ease; font-family:Inter, system-ui, sans-serif; }
.sim-dialog { width:min(1120px, 100%); max-height:min(760px, calc(100vh - 32px)); display:flex; flex-direction:column; background:#fff; border-radius:26px; box-shadow:0 40px 90px -30px rgba(15,23,42,.6); overflow:hidden; color:#1e293b; }
.sim-top { display:flex; align-items:center; gap:14px; padding:18px 22px; border-bottom:1px solid #eef0f6; }
.sim-mark { width:46px; height:46px; border-radius:15px; display:grid; place-items:center; color:#fff; font-size:20px; background:linear-gradient(135deg,#8B5CF6,#4F46E5); box-shadow:0 10px 22px -10px rgba(79,70,229,.8); }
.sim-top h2 { margin:0; font-size:19px; font-weight:800; color:#1e1b4b; }
.sim-top p { margin:2px 0 0; font-size:13px; color:#64748b; }
.sim-x { margin-left:auto; width:40px; height:40px; border-radius:50%; border:0; background:#f1f5f9; font-size:22px; color:#475569; cursor:pointer; }
.sim-x:hover { background:#e2e8f0; }
.sim-body { display:grid; grid-template-columns:minmax(280px, 360px) minmax(0, 1fr); gap:20px; padding:20px 22px; min-height:0; flex:1; overflow:auto; }
.sim-left { display:flex; flex-direction:column; gap:14px; min-width:0; }
.sim-field { display:flex; flex-direction:column; gap:6px; font-size:13px; font-weight:600; color:#334155; min-width:0; }
.sim-field textarea, .sim-field input, .sim-field select { font:inherit; font-weight:500; font-size:14px; padding:11px 13px; border:1.5px solid #e2e8f0; border-radius:14px; background:#f8fafc; color:#0f172a; outline:none; resize:vertical; }
.sim-field textarea:focus, .sim-field input:focus, .sim-field select:focus { border-color:#8B5CF6; background:#fff; box-shadow:0 0 0 4px rgba(139,92,246,.14); }
.sim-row { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.sim-examples { display:flex; flex-wrap:wrap; gap:7px; }
.sim-chip { display:inline-flex; align-items:center; gap:7px; height:34px; padding:0 12px; border-radius:999px; border:1.5px solid #e9e3fb; background:#faf8ff; color:#4c1d95; font:600 12.5px Inter, system-ui, sans-serif; cursor:pointer; transition:all .15s; }
.sim-chip i { color:#7C3AED; }
.sim-chip:hover { border-color:#8B5CF6; background:#f3edff; transform:translateY(-1px); }
.sim-go { height:48px; border:0; border-radius:15px; color:#fff; font:700 15px Inter, system-ui, sans-serif; cursor:pointer; background:linear-gradient(135deg,#8B5CF6,#4F46E5); box-shadow:0 14px 26px -14px rgba(79,70,229,.9); display:flex; align-items:center; justify-content:center; gap:9px; }
.sim-go:hover { filter:brightness(1.06); }
.sim-modal.busy .sim-go { opacity:.6; pointer-events:none; }
.sim-note { margin:0; font-size:12px; color:#64748b; display:flex; gap:7px; align-items:flex-start; }
.sim-note i { color:#10b981; margin-top:2px; }
.sim-right { display:flex; flex-direction:column; gap:8px; min-width:0; }
.sim-stage { position:relative; flex:1; min-height:340px; aspect-ratio:16 / 10; max-height:62vh; border-radius:20px; overflow:hidden; background:linear-gradient(135deg,#f5f3ff,#eef2ff); border:1.5px dashed #ddd6fe; }
.sim-modal.has-sim .sim-stage { border:0; background:#0f172a; }
.sim-stage .sim-clip { opacity:0; transition:opacity .3s; border-radius:20px; }
.sim-modal.has-sim .sim-stage .sim-clip { opacity:1; }
.sim-empty, .sim-busy { position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:6px; text-align:center; padding:20px; color:#5b21b6; }
.sim-empty i { font-size:42px; color:#a78bfa; margin-bottom:8px; animation:simSpin 9s linear infinite; }
.sim-empty span, .sim-busy span { font-size:13px; color:#7c6f99; }
.sim-modal.has-sim .sim-empty { display:none; }
.sim-busy { display:none; background:rgba(245,243,255,.94); }
.sim-modal.busy .sim-busy { display:flex; }
.sim-busy small { color:#94a3b8; font-size:12px; }
.sim-orb { position:relative; width:74px; height:74px; display:grid; place-items:center; margin-bottom:10px; color:#fff; font-size:24px; }
.sim-orb i { position:relative; z-index:2; }
.sim-orb::before { content:''; position:absolute; inset:10px; border-radius:50%; background:linear-gradient(135deg,#8B5CF6,#4F46E5); }
.sim-orb span { position:absolute; inset:0; border-radius:50%; border:2px solid rgba(139,92,246,.45); animation:simPulse 1.8s ease-out infinite; }
.sim-orb span + span { animation-delay:.9s; }
@keyframes simPulse { from { transform:scale(.7); opacity:1; } to { transform:scale(1.35); opacity:0; } }
@keyframes simSpin { to { transform:rotate(360deg); } }
.sim-msg { min-height:18px; font-size:13px; color:#dc2626; }
.sim-foot { display:flex; align-items:center; gap:12px; padding:14px 22px; border-top:1px solid #eef0f6; background:#fbfaff; }
.sim-foot-note { font-size:12.5px; color:#64748b; }
.sim-add { margin-left:auto; height:46px; padding:0 22px; white-space:nowrap; flex-shrink:0; border:0; border-radius:14px; color:#fff; font:700 14.5px Inter, system-ui, sans-serif; cursor:pointer; background:linear-gradient(135deg,#10b981,#059669); box-shadow:0 12px 24px -14px rgba(5,150,105,.9); display:flex; align-items:center; gap:8px; }
.sim-add:disabled { opacity:.45; cursor:not-allowed; box-shadow:none; }
@media (max-width: 760px) {
  .sim-body { grid-template-columns:1fr; }
  .sim-stage { min-height:260px; }
}
.sim-using { margin:0; font-size:12.5px; color:#5b21b6; background:#f3edff; border-radius:10px; padding:8px 10px; display:flex; gap:8px; align-items:center; }
.sim-bar-left .sim-bar { right:auto; left:0; }
.sim-bar-below .sim-bar { bottom:auto; top:calc(100% + 8px); }
.sim-bar-below .sim-bar::after { top:auto; bottom:100%; }
.sim-problem { position:absolute; left:50%; bottom:14px; transform:translateX(-50%); display:flex; align-items:center; gap:10px; padding:8px 8px 8px 14px; border-radius:14px; background:rgba(15,23,42,.88); color:#fff; font:600 13px Inter, system-ui, sans-serif; box-shadow:0 12px 28px -12px rgba(15,23,42,.6); z-index:3; white-space:nowrap; }
.sim-problem > i { color:#FBBF24; }
.sim-problem button { height:34px; padding:0 14px; border:0; border-radius:10px; background:linear-gradient(135deg,#8B5CF6,#4F46E5); color:#fff; font:700 13px Inter, system-ui, sans-serif; cursor:pointer; display:flex; align-items:center; gap:7px; }
.sim-fixed { color:#047857; font-weight:600; display:inline-flex; gap:7px; align-items:center; }
/* after the first simulation: change it, or start a new one */
.sim-mode { display:none; gap:4px; padding:4px; border-radius:14px; background:#f3f0ff; }
.sim-modal.has-sim .sim-mode { display:flex; }
.sim-mode-btn { flex:1; height:40px; border:0; border-radius:11px; background:transparent; color:#5b21b6; font:700 13px Inter, system-ui, sans-serif; cursor:pointer; display:flex; align-items:center; justify-content:center; gap:7px; white-space:nowrap; }
.sim-mode-btn.on { background:#fff; box-shadow:0 2px 8px rgba(76,29,149,.18); color:#4c1d95; }
.sim-modal.has-sim:not(.mode-new) .sim-examples { display:none; }
.sim-checking { color:#6d28d9; font-weight:600; display:inline-flex; gap:7px; align-items:center; }