*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none;touch-action:manipulation}#app{min-height:100%;display:flex;align-items:flex-start;justify-content:center;padding:16px}.game{width:min(94vw,480px);display:flex;flex-direction:column;gap:12px}.crumb{font-size:14px}.crumb a{color:var(--accent);text-decoration:none;font-weight:700}.crumb a:hover{text-decoration:underline}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.title{font-size:clamp(30px,8.5vw,44px);font-weight:800;line-height:1;letter-spacing:-1px}.sizes{display:flex;gap:8px}.size{flex:1;background:var(--surface);color:var(--text);border:2px solid var(--line);border-radius:6px;padding:11px 6px;font-size:14px;font-weight:700;cursor:pointer;transition:border-color .12s ease,background .12s ease}.size:hover{border-color:var(--accent)}.size.active{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}.stats{display:flex;gap:8px}.stat{flex:1;background:var(--board-bg);color:var(--accent-text);border-radius:6px;padding:6px 10px;text-align:center}.stat .label{font-size:10px;text-transform:uppercase;letter-spacing:1px;opacity:.85;font-weight:700}.stat .value{font-size:22px;font-weight:800;line-height:1.1}.board-wrap{position:relative;border-radius:10px;width:max-content;max-width:100%;margin:0 auto}.board{display:grid;grid-template-columns:repeat(var(--cols),var(--cell, 56px));gap:4px;padding:8px;background:var(--board-bg);border-radius:10px;touch-action:manipulation}.tile{position:relative;width:var(--cell, 56px);height:var(--cell, 56px);background:var(--cell-bg);border:none;border-radius:6px;cursor:pointer;padding:0;overflow:hidden;transition:filter 90ms ease,transform 60ms ease,background .2s ease}.tile:hover{filter:brightness(1.05)}.tile:active{transform:scale(.95)}.tile svg{display:block;width:100%;height:100%}@keyframes tileSpin{0%{transform:rotate(-90deg)}to{transform:rotate(0)}}.tile.spin svg{animation:tileSpin .19s ease;transform-origin:50% 50%}.tile .pipe{stroke:var(--muted);transition:stroke .2s ease}.tile.filled .pipe{stroke:#3f9ecb}.tile .hub{fill:var(--muted);transition:fill .2s ease}.tile.filled .hub{fill:#3f9ecb}.tile.source{background:#5aa85f}.tile.source .pipe,.tile.drain .pipe{stroke:var(--accent-text)}.tile.source .hub,.tile.drain .hub{fill:var(--accent-text)}.tile.drain{background:#c77d3f}.tile.drain.filled{background:#5aa85f}.tile .badge{position:absolute;top:3px;left:0;right:0;text-align:center;font-size:9px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;color:var(--accent-text);pointer-events:none}.btn{background:var(--accent);color:var(--accent-text);border:none;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:700;cursor:pointer;white-space:nowrap;transition:filter .12s ease}.btn:hover{filter:brightness(1.05)}.btn:active{filter:brightness(.95)}.overlay{position:absolute;inset:0;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:20px;background:var(--overlay-bg);z-index:10;opacity:0;pointer-events:none;transition:opacity .2s ease}.overlay.show{opacity:1;pointer-events:auto}.overlay .msg{font-size:clamp(28px,9vw,44px);font-weight:800}.overlay.win .msg{color:#43a047}.overlay .sub{font-size:15px;color:var(--text);opacity:.9}.overlay .actions{display:flex;gap:10px;margin-top:8px}.how{font-size:13px;opacity:.85;line-height:1.5}.how b{font-weight:700}