:root{--bg: #0b1418;--panel: #122029;--line: #233642;--ink: #eaf4f8;--dim: #8fa7b3;--accent: #4a9cc0;--water: #16323f;--water2: #1d4253;--bank: #1a2a22;--chip: #20323d;--chip2: #2a4250;--bad: #5a1f26;--good: #1f4a3a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#13262f,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:560px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:26px;letter-spacing:4px;font-weight:800;color:var(--accent)}.sub{margin:4px 0 0;color:var(--dim);font-size:12.5px;line-height:1.4}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:10px 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:#04181f}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:8px 15px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:default}.btn.primary{background:var(--accent);color:#04181f;border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#081116;border:1px solid var(--line);border-radius:8px;padding:5px 16px;font:800 18px ui-monospace,monospace;color:var(--accent);min-width:86px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.tide{position:relative;text-align:center;color:var(--dim);font-size:13px;margin:8px 0;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:7px 10px}.tide b{color:var(--accent);font-size:16px}.tidelabel{font-weight:800;letter-spacing:1px;color:var(--ink);margin-right:6px}.tidedots{color:var(--accent);letter-spacing:2px;margin-left:8px}.stage{position:relative}.river{display:grid;grid-template-columns:1fr auto 1fr;gap:6px;align-items:stretch;min-height:240px}.bank{background:linear-gradient(180deg,#1c2c23,#16241c);border:1px solid var(--line);border-radius:10px;padding:8px;display:flex;flex-direction:column}.banklabel{font-size:10px;letter-spacing:1px;color:var(--dim);font-weight:700;margin-bottom:6px;text-align:center}.channel{display:flex;flex-direction:column;justify-content:center;background:repeating-linear-gradient(180deg,var(--water),var(--water) 10px,var(--water2) 10px,var(--water2) 20px);border:1px solid var(--line);border-radius:10px;padding:8px;min-width:96px}.boat{background:#2a1c12;border:1px solid #573a22;border-radius:10px;padding:8px;transition:transform .25s ease}.boat.left{transform:translate(-6px)}.boat.right{transform:translate(6px)}.boatlabel{font-size:10px;letter-spacing:1px;color:#d9a86a;font-weight:800;text-align:center;margin-bottom:6px}.items{display:flex;flex-direction:column;gap:6px;align-items:stretch;flex:1}.chip{background:var(--chip);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:8px 6px;font:700 13px system-ui;cursor:pointer;text-align:center}.chip.loadable:hover{border-color:var(--accent);background:var(--chip2)}.chip.loaded{background:var(--good);border-color:var(--accent)}.chip:disabled{opacity:.85;cursor:default}.empty{color:var(--dim);font-size:12px;text-align:center;padding:8px 0;opacity:.6}.controls{display:flex;gap:8px;justify-content:center;margin:14px 0 6px;flex-wrap:wrap}.rules{text-align:center;color:var(--dim);font-size:12.5px;margin:6px 0;line-height:1.5}.rules b{color:var(--ink)}.hiddenwarn{color:#d9a86a;font-style:italic}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#060c10cc;border-radius:10px;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:340px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent)}.card p{margin:6px 0;color:var(--dim);font-size:14px;line-height:1.5}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.flash{position:absolute;left:50%;bottom:-6px;transform:translate(-50%,100%);background:var(--good);color:var(--ink);border:1px solid var(--accent);padding:6px 12px;border-radius:8px;font-size:12.5px;white-space:nowrap;z-index:5;box-shadow:0 4px 14px #0006}.flash.bad{background:var(--bad);border-color:#ff9aa6;color:#ffd7dc}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:14px;line-height:1.5}.hint b{color:var(--ink)}