/* tree.css — page layer for /paper-christmas-tree/. The shell (header, controls, buttons,
   explainer, footer) is /assets/polyatic.css; this adds the cutting-mat stage with the built tree
   (a night scene that keeps its own colours in both themes, like the printed sheet), the sheet
   preview, the pickers and the colour swatches. */
.pt-noscript{margin:1rem;padding:.875rem 1rem;border:1px solid var(--line);border-left:.25rem solid var(--accent);border-radius:.625rem;background:var(--surface)}
.pt-head h1{margin-bottom:.25rem}
.pt-head .sub{margin-bottom:.875rem}

/* ---------- the stage ---------- */
.duo.pt-duo>.pane-result{position:static}
.pt-stage{background:radial-gradient(120% 80% at 50% 0%,rgba(255,206,120,.12),transparent 60%),linear-gradient(180deg,var(--mat),var(--mat-2));
  color:var(--mat-ink);border-radius:var(--r);padding:.625rem .75rem .875rem;box-shadow:var(--shadow);min-width:0}
.pt-stage-h{font-family:var(--mono);font-size:.6875rem;font-weight:500;text-transform:uppercase;letter-spacing:.07em;color:var(--mat-muted);margin:0 0 .5rem;text-align:center}
.pt-modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.25rem;margin:0 0 .5rem;padding:.1875rem;border-radius:.625rem;background:rgba(0,0,0,.22)}
.pt-modes button{border:0;border-radius:.4375rem;background:transparent;color:var(--mat-ink);font:inherit;font-size:.8125rem;font-weight:600;padding:.4375rem .25rem;cursor:pointer;min-width:0}
.pt-modes button.active{background:var(--mat-ink);color:var(--mat)}
.pt-modes button:focus-visible{outline:2px solid var(--mat-ink);outline-offset:2px}
.pt-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,5.5rem);gap:.625rem;align-items:center}
.pt-scene{line-height:0;border-radius:.625rem;overflow:hidden;box-shadow:0 14px 30px -18px rgba(0,0,0,.7)}
.pt-scene svg{display:block;width:100%;height:auto}
.pt-side{min-width:0;display:flex;flex-direction:column;gap:.375rem}
.pt-paper{line-height:0;display:flex;justify-content:center}
.pt-paper canvas{display:block;width:100%;height:auto;border-radius:2px;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.1),0 14px 30px -14px rgba(0,0,0,.6)}
.pt-pager{display:flex;align-items:center;justify-content:center;gap:.25rem;font-family:var(--mono);font-size:.6875rem;color:var(--mat-muted);flex-wrap:wrap;text-align:center}
.pt-pager[hidden]{display:none}
.pt-pg{width:1.875rem;height:1.75rem;border-radius:.5rem;border:1px solid rgba(255,255,255,.3);background:transparent;color:var(--mat-ink);font:inherit;font-size:.9375rem;cursor:pointer}
.pt-pg:disabled{opacity:.35;cursor:default}
.pt-pg:focus-visible{outline:2px solid var(--mat-ink);outline-offset:2px}
.pt-summary{margin:.5rem 0 .5rem;text-align:center;font-size:.8125rem;line-height:1.35;color:var(--mat-ink)}
.pt-dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.375rem}
.pt-dl .btn{padding-left:.375rem;padding-right:.375rem;font-size:.8125rem;min-width:0}
.pt-dl .btn:first-child{grid-column:1 / -1;font-size:.9375rem}
.pt-dl .btn:disabled{opacity:.55;cursor:not-allowed}
.pt-stage .btn.ghost{color:var(--mat-ink);border-color:rgba(255,255,255,.4);background:transparent}
.pt-msg{margin:.375rem 0 0;text-align:center;font-size:.8125rem;color:var(--mat-muted)}
.pt-msg:empty{display:none}

/* ---------- the form ---------- */
.pt-form-h{margin:0 0 .75rem;font-size:1.1875rem}
.pt-hint{margin:.375rem 0 0;font-size:.8125rem;color:var(--muted);line-height:1.45}
.pt-hint:empty{display:none}
.pt-hint.pt-warn{color:var(--ink);border-left:3px solid var(--accent);padding-left:.5rem}
.pt-form [hidden]{display:none!important}
.pt-form #slotFields>.field+.field{margin-top:var(--field-gap,1rem)}
.pt-picks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.375rem}
.pt-picks button{display:flex;flex-direction:column;gap:.125rem;align-items:flex-start;text-align:left;padding:.5rem;border:1px solid var(--line);border-radius:.5rem;
  background:var(--surface-2);color:var(--ink);font:inherit;font-size:.8125rem;cursor:pointer;min-width:0}
.pt-picks b{font-size:.8125rem;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.pt-picks span{font-size:.6875rem;color:var(--muted);line-height:1.3}
.pt-picks button:hover,.pt-swatches button:hover{border-color:var(--muted)}
.pt-picks button.active,.pt-swatches button.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.pt-picks button:focus-visible,.pt-swatches button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.pt-num{display:flex;align-items:center;gap:.5rem;margin-top:.5rem;max-width:16rem}
.pt-num input{flex:0 0 6rem;min-width:0}
.pt-num span{color:var(--muted);font-size:.875rem}
.pt-form input[type=text]{width:100%}
.pt-form input[type=range]{width:100%;accent-color:var(--accent)}
.pt-out{margin-left:auto;font-family:var(--mono);font-size:.875rem}
.pt-swatches{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.375rem}
.pt-swatches button{display:flex;align-items:center;gap:.375rem;padding:.4375rem .5rem;border:1px solid var(--line);border-radius:.5rem;background:var(--surface-2);color:var(--ink);font:inherit;font-size:.8125rem;cursor:pointer;min-width:0}
.pt-swatches i{flex:0 0 auto;width:1rem;height:1rem;border-radius:50%;background:var(--sw);box-shadow:inset 0 0 0 1px rgba(0,0,0,.25)}

@media(min-width:920px){
  .duo.pt-duo{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);grid-template-areas:none}
  .duo.pt-duo>.pane-result,.duo.pt-duo>.pane-main{grid-area:auto}
  .pt-stage{position:sticky;top:1rem}
  .pt-row{grid-template-columns:minmax(0,1fr) minmax(0,8.5rem)}
  .pt-dl{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:480px){.pt-heights{grid-template-columns:repeat(2,minmax(0,1fr))}}