:root{--bg: #0e1410;--panel: #16201a;--line: #2a3a30;--ink: #eaf5ee;--dim: #8fb8a3;--accent: #57c98a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#122a1d,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:480px;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(--accent)}.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:#052015}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:8px 16px;border-radius:999px;font:700 14px system-ui;cursor:pointer}.btn:hover:not(:disabled){border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:default}.btn.primary{background:var(--accent);color:#052015;border-color:var(--accent)}.hud{display:flex;gap:8px;align-items:stretch;justify-content:space-between;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:8px 0 12px;flex-wrap:wrap}.hud .lbl{display:block;color:var(--dim);font-size:11px;text-transform:uppercase;letter-spacing:.5px}.hud .bldg{font-size:20px;font-weight:800}.hud .bldg.small{font-size:15px;color:var(--dim)}.hud .now{flex:1 1 auto}.hud .next{flex:0 0 auto}.hud .stat{text-align:right;flex:0 0 auto}.hud .stat .val{font-size:22px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}.grid{display:grid;grid-template-columns:repeat(var(--n, 8),1fr);gap:4px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:8px}.cell{aspect-ratio:1 / 1;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:clamp(16px,5vw,26px);line-height:1;background:#1a261f;border:1px solid #223028;cursor:default;transition:background .08s,transform .08s}.cell.empty{cursor:pointer}.cell.empty:hover{border-color:var(--accent)}.cell.filled{cursor:default}.cell.h0{background:#5a1f22}.cell.h1{background:#5a3320}.cell.h2{background:#3a3a24}.cell.h3{background:#2c4a2f}.cell.h4{background:#2f6b41}.cell.h5{background:#3a9c5d}.cell.preview{font-size:15px;font-weight:800;color:#fff}.cell.preview.good{background:#2f6b41;border-color:var(--accent)}.cell.preview.bad{background:#5a1f22;border-color:#c95a5a}.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#06100acc;backdrop-filter:blur(3px)}.overlay.hidden{display:none}.modal{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:320px}.modal h2{margin:0 0 6px;font-size:22px;color:var(--accent)}.modal .gradeBig{font-size:52px;font-weight:800;color:var(--accent);line-height:1;margin:4px 0}.modal .big{font-size:36px;font-weight:800;color:var(--ink);margin:2px 0}.modal p{margin:6px 0;color:var(--dim);font-size:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:10px}