:root{--bg:#1d2b1f;--bg-soft:#26371f;--panel:#f5edd8;--panel-dark:#e9dfc3;--ink:#2c2416;--accent:#c0392b;--accent-dark:#96281b;--gold:#e3b54c;--muted:#7a6c50}*{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{background:radial-gradient(1200px 700px at 20% -10%, #31502c 0%, transparent 60%), radial-gradient(900px 600px at 110% 110%, #4a2c20 0%, transparent 55%), var(--bg);color:var(--ink);min-height:100%;font-family:Segoe UI,Helvetica Neue,Arial,sans-serif}#loading{justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.loading-card{background:var(--panel);text-align:center;border-radius:16px;max-width:min(90vw,460px);padding:40px 56px;box-shadow:0 18px 60px #00000073}.loading-emoji{font-size:56px;line-height:1}#loading h1{letter-spacing:.04em;margin:12px 0 2px;font-size:34px}.subtitle{color:var(--muted);margin:0 0 24px;font-size:16px}.spinner{border:4px solid var(--panel-dark);border-top-color:var(--accent);border-radius:50%;width:44px;height:44px;margin:0 auto 18px;animation:.9s linear infinite spin}.spinner.failed{border-top-color:var(--panel-dark);animation:none}@keyframes spin{to{transform:rotate(360deg)}}#loading-stage{margin-bottom:6px;font-weight:600}#loading-detail{color:var(--muted);overflow-wrap:anywhere;max-width:340px;font-size:13px}#app{flex-direction:column;min-height:100vh;display:flex}#topbar{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000040;flex-wrap:wrap;align-items:center;gap:12px;padding:10px 18px;display:flex}.brand{color:#f4d03f;letter-spacing:.05em;text-shadow:0 2px 8px #00000080;margin-right:auto;font-size:22px;font-weight:700}.brand-cn{opacity:.8;font-size:15px}.actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}button,select{font:inherit}.actions button,.strength-picker select,.dialog-buttons button{background:var(--panel);color:var(--ink);cursor:pointer;border:1px solid #ffffff2e;border-radius:8px;padding:7px 12px;font-size:14px;transition:transform 60ms,background .15s}.actions button:hover:not(:disabled){background:#fffdf4;transform:translateY(-1px)}.actions button:disabled{opacity:.45;cursor:default}.actions button[aria-pressed=true]{background:var(--gold)}.strength-picker{color:#f0e6c8;align-items:center;gap:6px;font-size:14px;display:flex}.strength-picker select{padding:6px 8px}#layout{flex:1;grid-template-columns:minmax(0,1fr) 270px;gap:16px;width:100%;max-width:1180px;margin:0 auto;padding:16px;display:grid}#board-area{min-height:420px;position:relative}#board{touch-action:none;background:var(--panel-dark);border-radius:10px;width:100%;height:100%;position:absolute;inset:0;box-shadow:0 14px 44px #00000080}#sidebar{background:var(--panel);border-radius:12px;flex-direction:column;gap:10px;min-height:0;padding:14px 16px;display:flex;box-shadow:0 14px 44px #00000059}#turn-label{font-size:18px;font-weight:700}#ai-info{color:var(--muted);min-height:18px;font-family:Consolas,Courier New,monospace;font-size:13px}#game-meta{color:var(--muted);font-size:13px}#sidebar h2{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:6px 0 0;font-size:13px}#history{flex:1;min-height:120px;margin:0;padding-left:26px;font-size:14px;line-height:1.65;overflow-y:auto}#history li.side-red::marker{color:var(--accent);font-weight:700}#history li.side-blue::marker{color:#2471a3;font-weight:700}#history li.capture{font-weight:700}dialog.card{background:var(--panel);color:var(--ink);border:none;border-radius:14px;max-width:min(92vw,420px);padding:0;box-shadow:0 24px 80px #0000008c}dialog.card.wide{max-width:min(92vw,640px)}dialog.card::backdrop{background:#0a100a8c}dialog.card form{padding:24px 28px}dialog.card h2{margin:0 0 16px}.field{justify-content:space-between;align-items:center;gap:16px;margin-bottom:12px;font-size:15px;display:flex}.field select{font:inherit;background:#fffdf4;border:1px solid #c9bb96;border-radius:8px;min-width:180px;padding:7px 10px}.dialog-buttons{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.dialog-buttons .primary{background:var(--accent);border-color:var(--accent-dark);color:#fff}.dialog-buttons .primary:hover{background:var(--accent-dark)}.rules p{margin:0 0 10px;font-size:14.5px;line-height:1.55}.dot-demo,.ring-demo{vertical-align:-1px;border-radius:50%;width:12px;height:12px;display:inline-block}.dot-demo{background:#27ae60bf}.ring-demo{border:3px solid #e74c3cdb}.tech{color:var(--muted);font-size:13.5px;line-height:1.6}@media (max-width:860px){#layout{grid-template-columns:1fr;padding:10px}#board-area{min-height:min(120vw,78vh)}#sidebar{max-height:300px}}