:root{--bg: #0c1018;--panel: #161d2b;--line: #28324a;--ink: #e9eef7;--dim: #93a3c0;--accent: #5a7ad0;--me: #2b6cf0;--ai: #e0433a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(1000px 600px at 50% -10%,#18233a,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:820px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:27px;letter-spacing:5px;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 14px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#06122b}.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:not(:disabled){border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:not-allowed}.score{display:flex;gap:12px;justify-content:center;align-items:center;margin:8px 0;font-weight:700}.score .me{color:#9cc0ff}.score .ai{color:#ff9b95}.score .vs{color:var(--dim);font-weight:600}.status{text-align:center;min-height:20px;color:var(--dim);font-size:13px;font-weight:600;padding:0 6px}.layout{display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap;justify-content:center}.stage{position:relative;flex:0 0 auto}canvas{width:360px;max-width:100%;height:auto;display:block;border-radius:8px;box-shadow:0 12px 34px #0000008c;touch-action:none;cursor:pointer;background:#0a0f18}.panel{flex:1 1 320px;min-width:280px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 12px}.panel h3{margin:0 0 6px;font-size:14px;color:var(--accent);letter-spacing:1px}.techlist{display:flex;flex-direction:column;gap:3px;max-height:360px;overflow:auto}.era{color:var(--dim);font-size:11px;text-transform:uppercase;letter-spacing:1px;margin:6px 0 2px}.tech{text-align:left;border:1px solid var(--line);background:#111726;color:var(--ink);border-radius:7px;padding:6px 9px;font:600 12px system-ui;cursor:pointer;display:flex;align-items:center;gap:6px;flex-wrap:wrap}.tech .cost{color:var(--dim);margin-left:auto;font-weight:700}.tech .req{color:#c98a8a;font-size:10px;font-weight:500;width:100%}.tech.known{background:#14321f;border-color:#2e6b3f;color:#b9e9c6}.tech.open{border-color:var(--accent)}.tech.open:hover{background:#1b2942}.tech.locked{opacity:.55;cursor:not-allowed}.tech.sel{outline:2px solid var(--accent)}.actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:12px 0 4px}.act{min-width:130px}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#060a12c7;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:320px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .small{font-size:12px}.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}