:root{--bg: #1b2330;--panel: #232e3e;--line: #34465c;--ink: #eaf1f8;--dim: #9fb3c8;--accent: #4cc2ff;--hidden: #3a4d66;--hidden2: #445975;--revealed: #1c2531;--flag: #ff6b5e;--good: #56d98a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(1000px 600px at 50% -8%,#233143,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:640px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:28px;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:#052233}.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{border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;align-items:center;margin:8px 0}.readout{background:#0c1119;border:1px solid var(--line);border-radius:8px;padding:4px 12px;font:800 20px ui-monospace,monospace;min-width:76px;text-align:center;color:var(--accent)}.face{font-size:26px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:2px 10px;cursor:pointer}.stage{position:relative;display:flex;justify-content:center}.grid{display:grid;gap:2px;background:var(--line);border:3px solid var(--line);border-radius:8px;padding:3px;width:min(94vw,540px);touch-action:manipulation}.cell{aspect-ratio:1;display:flex;align-items:center;justify-content:center;font:800 clamp(11px,3.4vw,22px)/1 ui-monospace,monospace;border-radius:2px;cursor:pointer;background:linear-gradient(145deg,var(--hidden2),var(--hidden))}.cell.revealed{background:var(--revealed);cursor:default;box-shadow:inset 0 0 0 1px #ffffff08}.cell.flag{color:var(--flag)}.cell.mine{background:#7a2a24}.cell.boom{background:var(--flag)}.cell.n1{color:#6ab7ff}.cell.n2{color:#56d98a}.cell.n3{color:#ff7b6e}.cell.n4{color:#b08cff}.cell.n5{color:#e0a34a}.cell.n6{color:#3fd0c8}.cell.n7{color:#d7dde6}.cell.n8{color:#9fb3c8}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#080c12b3;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:340px}.card h2{margin:0 0 6px;font-size:24px}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12.5px;margin-top:10px}