*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0a0b0f;--bg2:#11131a;--card:#161922;--card2:#1a1e28;--border:#232733;--border2:#2d3340;--text:#e8eaf0;--dim:#7a8190;--accent:#4f8cff;--hover:#6ba1ff;--green:#2ecc71;--red:#ff3b3b;--gold:#fdcb6e;--r:16px;
--c1:#4f8cff;--c2:#2ecc71;--c3:#ff3b3b;--c4:#9b59b6;--c5:#fdcb6e;--c6:#1abc9c;--c7:#e8eaf0;--c8:#7a8190}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.7;overflow-x:hidden}
.navbar{display:flex;justify-content:space-between;align-items:center;padding:.75rem 2rem;border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(10,11,15,.92);backdrop-filter:blur(12px);z-index:50}
.navbar .brand{font-weight:800;color:var(--text);text-decoration:none;font-size:1.05rem;display:flex;align-items:center;gap:.4rem}
.navbar .nav-links{display:flex;gap:1rem}
.navbar .nav-links a{color:var(--dim);text-decoration:none;font-size:.82rem;transition:color .2s;min-height:44px;display:inline-flex;align-items:center}
.navbar .nav-links a:hover,.navbar .nav-links a.active{color:var(--hover)}
main{max-width:760px;margin:0 auto;padding:2.5rem 1.5rem 3rem}
h1{font-size:2.2rem;margin-bottom:.4rem;text-align:center;background:linear-gradient(135deg,#ff3b3b,#fdcb6e,#4f8cff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{color:var(--dim);font-size:1rem;margin-bottom:1.5rem;text-align:center}
h2{font-size:1.15rem;margin:1.5rem 0 .6rem;color:var(--hover)}
p{margin-bottom:.75rem}a{color:var(--hover)}
ul{margin:0 0 1rem 1.25rem}li{margin-bottom:.4rem}

/* Difficulty buttons */
.diff-btns{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center;margin-bottom:1rem}
.diff-btn{background:var(--bg2);border:1px solid var(--border2);border-radius:999px;padding:.5rem 1.3rem;font-size:.85rem;color:var(--dim);cursor:pointer;transition:all .15s;font-family:inherit;min-height:44px;display:inline-flex;align-items:center}
.diff-btn:hover{border-color:var(--accent);color:var(--text)}
.diff-btn.active{background:linear-gradient(135deg,var(--accent),#3a78f0);border-color:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(79,140,255,.3)}

/* Game header */
.game-header{background:linear-gradient(180deg,var(--card),var(--card2));border:1px solid var(--border2);border-radius:var(--r);padding:1rem 1.5rem;display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;box-shadow:0 4px 20px rgba(0,0,0,.2)}
.counter{display:flex;flex-direction:column;align-items:center;min-width:80px}
.counter .label{font-size:.65rem;color:var(--dim);text-transform:uppercase;letter-spacing:.05em}
.counter .value{font-size:1.8rem;font-weight:800;font-variant-numeric:tabular-nums;color:var(--red);font-family:"Courier New",monospace;line-height:1.2}
.counter.timer .value{color:var(--gold)}
.reset-btn{background:linear-gradient(135deg,var(--accent),#3a78f0);color:#fff;border:none;border-radius:12px;width:52px;height:52px;font-size:1.6rem;cursor:pointer;transition:transform .1s,box-shadow .15s;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(79,140,255,.3)}
.reset-btn:hover{box-shadow:0 6px 20px rgba(79,140,255,.45)}
.reset-btn:active{transform:scale(.93)}

/* Board */
.board-wrap{display:flex;justify-content:center;margin-bottom:1rem;overflow-x:auto}
.board{display:grid;gap:2px;background:var(--border2);padding:2px;border-radius:8px;user-select:none}
.cell{width:32px;height:32px;background:var(--bg2);border:1px solid var(--border);border-radius:3px;display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:800;font-family:"Courier New",monospace;cursor:pointer;transition:background .1s;position:relative}
.cell:hover:not(.revealed):not(.flagged){background:var(--card)}
.cell.revealed{background:var(--card);cursor:default;border-color:transparent}
.cell.revealed.empty{background:rgba(255,255,255,.02)}
.cell.mine{background:var(--red)}
.cell.mine.exploded{background:#ff6b6b;animation:explode .3s}
.cell.flagged::after{content:"🚩";font-size:.8rem}
.cell.questioned::after{content:"❓";font-size:.7rem}
.cell.n1{color:var(--c1)}.cell.n2{color:var(--c2)}.cell.n3{color:var(--c3)}.cell.n4{color:var(--c4)}.cell.n5{color:var(--c5)}.cell.n6{color:var(--c6)}.cell.n7{color:var(--c7)}.cell.n8{color:var(--c8)}
@keyframes explode{0%{transform:scale(1)}50%{transform:scale(1.2)}100%{transform:scale(1)}}

/* Status */
.status{background:var(--card);border:1px solid var(--border2);border-radius:var(--r);padding:1rem 1.5rem;text-align:center;margin-bottom:1rem;display:none}
.status.show{display:block;animation:fade .2s}
.status.win{border-color:var(--green);background:linear-gradient(135deg,rgba(46,204,113,.1),transparent)}
.status.lose{border-color:var(--red);background:linear-gradient(135deg,rgba(255,59,59,.1),transparent)}
.status .title{font-size:1.3rem;font-weight:800}
.status.win .title{color:var(--green)}.status.lose .title{color:var(--red)}
.status .detail{color:var(--dim);font-size:.85rem;margin-top:.25rem}

/* Best times */
.best-times{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin-bottom:1rem}
.best-card{background:var(--card);border:1px solid var(--border2);border-radius:12px;padding:.85rem;text-align:center}
.best-card .label{font-size:.7rem;color:var(--dim);text-transform:uppercase;letter-spacing:.05em}
.best-card .value{font-size:1.3rem;font-weight:800;color:var(--gold);font-variant-numeric:tabular-nums;font-family:"Courier New",monospace;margin-top:.2rem}

.btn{background:linear-gradient(135deg,var(--accent),#3a78f0);color:#fff;border:none;border-radius:10px;padding:.65rem 1.5rem;font-size:.88rem;font-weight:600;cursor:pointer;transition:transform .1s,box-shadow .15s;font-family:inherit;min-height:44px;box-shadow:0 4px 14px rgba(79,140,255,.3)}
.btn:hover{box-shadow:0 6px 20px rgba(79,140,255,.45)}
.btn:active{transform:scale(.97)}

.stats-footer{text-align:center;margin:1.5rem 0;font-size:.78rem;color:var(--dim)}
.stats-footer strong{color:var(--hover);font-variant-numeric:tabular-nums}
.stat-divider{margin:0 .6rem;opacity:.4}
footer{text-align:center;padding:1.5rem 2rem;color:var(--dim);font-size:.75rem;border-top:1px solid var(--border)}
footer a{color:var(--hover);text-decoration:none}
.seo-section{color:var(--dim);font-size:.88rem;margin-top:2.5rem;line-height:1.8}
.seo-section h2{color:var(--text)}

@keyframes fade{0%{opacity:0}100%{opacity:1}}

@media(max-width:600px){
  main{padding:2rem 1rem 3rem}
  h1{font-size:1.7rem}
  .cell{width:28px;height:28px;font-size:.9rem}
  .navbar{padding:.75rem 1rem}
  .navbar .nav-links{gap:.6rem}
  .game-header{padding:.75rem 1rem}
  .counter .value{font-size:1.5rem}
}