:root{
  --sans:'IBM Plex Sans Thai','Noto Sans Thai',system-ui,-apple-system,'Segoe UI',sans-serif;
  --ink:#191a24; --muted:#6b6c7e; --line:#e6e3dc; --surface:#fff; --bg:#f5f4ef;
  --brand:#2e7d88; --brand-ink:#1f5f68; --brand-soft:#dcecee; --ok:#129a72; --warn:#d68a17; --danger:#e2564a;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);display:flex;flex-direction:column;-webkit-font-smoothing:antialiased;user-select:none;-webkit-user-select:none}
#stage{position:relative;flex:1;min-height:0;background:#eef4ea}
#webgl-canvas{width:100%;height:100%;display:block;touch-action:none}
.status{position:absolute;left:12px;top:12px;right:96px;background:rgba(255,255,255,.95);border:1px solid var(--line);border-radius:12px;padding:8px 13px;font-size:.82rem;box-shadow:0 4px 14px rgba(25,26,36,.08);pointer-events:none;max-width:min(560px,calc(100% - 120px));line-height:1.5}
.status.ok{border-color:#bfe9da;color:#0a6b50;background:#f0fbf7}
.status.bad{border-color:#f6cdc9;color:#8f2018;background:#fdf3f2}
.status.warn{border-color:#f7e2bd;color:#7d5209;background:#fffaf0}
.punnett{position:absolute;right:12px;bottom:12px;background:rgba(255,255,255,.97);border:1px solid var(--line);border-radius:14px;padding:10px 12px;box-shadow:0 6px 20px rgba(25,26,36,.14)}
.punnett[hidden]{display:none}
.pn-title{font-size:.72rem;font-weight:700;color:var(--muted);margin-bottom:6px}
.pn-table{border-collapse:collapse}
.pn-table td,.pn-table th{width:42px;height:42px;text-align:center;font-size:.9rem;font-weight:700;border:1px solid var(--line)}
.pn-table th{background:var(--bg);color:var(--brand-ink)}
.pn-table td.dom{background:#ede6ff;color:#1f5f68}
.pn-table td.rec{background:#f0f0f0;color:#6b6c7e}
.pn-ratio{margin-top:6px;font-size:.78rem;font-weight:600;text-align:center}
#panel{flex:none;background:var(--surface);border-top:1px solid var(--line);padding:12px 14px 14px;display:flex;flex-direction:column;gap:10px;max-height:54vh;overflow-y:auto}
.panel-head{display:flex;align-items:baseline;gap:10px}
.panel-title{font-weight:700;font-size:.92rem}
.goal{font-size:.78rem;color:var(--muted);margin-left:auto;text-align:right}
.trait-row{display:flex;align-items:center;gap:8px}
.tr-label{font-size:.8rem;font-weight:600;color:var(--muted)}
.wb-select{font-family:inherit;font-size:.82rem;font-weight:600;color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:6px 10px;background:var(--bg);flex:1}
.parents{display:flex;gap:8px}
.parent{flex:1;display:flex;flex-direction:column;gap:3px;font-size:.74rem;font-weight:600;color:var(--muted)}
.note{font-size:.74rem;color:var(--muted);line-height:1.5;margin:0}
.btn-run{background:var(--brand);color:#fff}
.quiz{display:flex;flex-direction:column;gap:6px;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:9px 11px}
.qz-q{font-size:.76rem;font-weight:600}
.qz-opts{display:flex;flex-wrap:wrap;gap:5px}
.qz-opt{border:1px solid var(--line);background:#fff;border-radius:9px;padding:5px 12px;font-family:inherit;font-size:.78rem;cursor:pointer}
.qz-opt.correct{background:#e9f8f2;border-color:var(--ok);color:#0a6b50}
.qz-opt.wrong{background:#fdf3f2;border-color:var(--danger);color:#8f2018}
.tasks{display:flex;flex-direction:column;gap:5px}
.tk-head{font-size:.78rem;font-weight:600;color:var(--muted)}
.tk-head span:last-child{background:var(--brand-soft);color:var(--brand-ink);padding:1px 8px;border-radius:999px;font-size:.72rem}
.task-list{display:flex;flex-direction:column;gap:4px}
.task-item{display:flex;align-items:center;gap:7px;font-size:.76rem;padding:6px 9px;border-radius:8px;background:var(--bg)}
.task-item.is-done{background:#e9f8f2;color:#0a6b50}
.task-check{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);flex:none}
.task-item.is-done .task-check{background:var(--ok);border-color:var(--ok)}
.actions{display:flex;gap:8px}
.btn{padding:10px 14px;border-radius:999px;border:1px solid transparent;font-family:inherit;font-size:.84rem;font-weight:600;cursor:pointer;box-shadow:0 2px 6px rgba(25,26,36,.12)}
.btn:active{transform:translateY(1px)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn-submit{background:var(--ok);color:#fff;flex:1}
@media (min-width:900px){body{flex-direction:row}#panel{width:340px;max-height:none;height:100%;border-top:none;border-left:1px solid var(--line);padding:16px}}
@media (max-width:560px){.status{position:static;margin:8px 12px;max-width:none;right:auto}.punnett{position:static;margin:0 12px 8px}#stage{display:flex;flex-direction:column;min-height:42vh}#webgl-canvas{flex:1;min-height:160px}}

/* ---------- สองลักษณะ · จำนวนลูก · หลายรุ่น ---------- */
.two-box,.pop-box{display:flex;flex-direction:column;gap:7px;border:1px solid var(--line);
  border-radius:12px;padding:9px 11px;background:var(--bg)}
.box-head{display:flex;align-items:center;gap:8px;font-size:.78rem;font-weight:600;color:var(--muted)}
.mini-btn{margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:999px;
  padding:2px 11px;font-size:.7rem;font-family:inherit;cursor:pointer;color:var(--muted)}
.mini-btn.on{border-color:var(--brand);background:var(--brand);color:#fff;font-weight:600}
.pop-knobs{display:flex;flex-direction:column;gap:7px}
.pop-btns{display:flex;gap:6px;flex-wrap:wrap}
.btn-sm{padding:5px 12px;font-size:.74rem;box-shadow:none}
.pop-cv{display:block;width:100%;height:auto;border-radius:9px;background:#fff;border:1px solid var(--line)}
.res{display:grid;grid-template-columns:1fr auto;gap:2px 10px;font-size:.74rem;align-items:baseline}
.res-k{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.res-v{font-variant-numeric:tabular-nums;font-weight:700;text-align:right}
.res-v.good{color:#2e7d4f}
.res-v.warn{color:#c0392b}