:root{--bg: #0f1512;--panel: #1a2420;--line: #2c3c34;--ink: #eaf3ee;--dim: #9bb6a8;--accent: #5a9c6a;--accent2: #7fd49a;--wall: #10160f;--ok: #7fd49a;--bad: #e0654a;--H: #d8e0e6;--O: #e0654a;--C: #5a6470;--N: #5a82c4}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#16201b,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:680px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:26px;letter-spacing:3px;font-weight:800;color:var(--accent2)}.sub{margin:2px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:9px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#07120b}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent2)}.btn.primary{background:var(--accent);color:#07120b;border-color:var(--accent)}.status{text-align:center;min-height:20px;margin:6px 0;color:var(--dim);font-size:13px;font-weight:600}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:480px;height:auto;display:block;border-radius:8px;background:#0a0f0c;box-shadow:0 12px 34px #0000008c;touch-action:none}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#080c0abf;border-radius:8px;backdrop-filter:blur(3px)}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:360px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent2)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:10px}.editor{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px;margin-top:12px}.editor h3{margin:0 0 8px;font-size:13px;color:var(--accent2);letter-spacing:1px;text-transform:uppercase}.palette{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.palette button{background:#12211a;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:6px 10px;font:700 12px ui-monospace,monospace;cursor:pointer}.palette button:hover{border-color:var(--accent2)}.proglist{display:flex;flex-wrap:wrap;gap:5px;min-height:36px;padding:6px;background:#0c1410;border-radius:8px;border:1px dashed var(--line)}.chip{background:#1c2c24;border:1px solid var(--line);color:var(--ink);border-radius:7px;padding:5px 9px;font:700 12px ui-monospace,monospace;cursor:pointer;position:relative}.chip:hover{border-color:var(--bad)}.chip.pc{outline:2px solid var(--accent2)}.chip small{color:var(--dim);font-weight:500}.empty-prog{color:var(--dim);font-size:12px;font-style:italic;align-self:center}.legend{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:8px;font-size:11px;color:var(--dim)}.legend span{display:inline-flex;align-items:center;gap:4px}.dot{width:11px;height:11px;border-radius:50%;display:inline-block}