/* ═══════════════════════════════════════════════
   NumTrail — Game Styles
   ═══════════════════════════════════════════════ */

.menu { display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;gap:18px; }
.menu-title { font-size:clamp(38px,10vw,56px);font-weight:700;letter-spacing:4px;color:var(--navy); }
.menu-sub { font-size:14px;font-weight:300;color:var(--text-dim);letter-spacing:1.5px; }
.menu-how { max-width:340px;text-align:center;font-size:13px;font-weight:400;line-height:1.7;color:var(--text-mid);padding:16px 20px;border-radius:var(--radius-md);background:var(--bg-subtle);border:1px solid var(--border); }
.diff-btns { display:flex;flex-wrap:wrap;gap:10px;margin-top:4px;justify-content:center; }
.diff-btn { padding:14px 24px;border-radius:var(--radius-md);border:2px solid var(--border);background:var(--bg);color:var(--navy);font-size:13px;font-weight:600;letter-spacing:2.5px;cursor:pointer;font-family:var(--font);transition:all var(--transition);box-shadow:var(--shadow-sm); }
.diff-btn:hover { background:var(--bg-subtle);transform:translateY(-2px);box-shadow:var(--shadow-md); }

.game { display:none;flex-direction:column;align-items:center;width:100%;max-width:460px;flex:1; }
.game.active { display:flex; }

.game-hdr { display:flex;justify-content:space-between;align-items:center;width:100%;padding:0 0 14px; }
.badge { background:var(--bg-subtle);border:1.5px solid var(--border);padding:8px 16px;border-radius:var(--radius-pill);font-size:11px;font-weight:600;letter-spacing:2.5px;color:var(--navy); }
.hint-btn { background:var(--bg-subtle);border:1.5px solid var(--border);color:var(--navy);width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-sm); }

.nt-grid-wrap { display:flex;justify-content:center;width:100%;padding:4px 0 16px; }
.nt-grid { display:grid;gap:4px; }
.nt-cell { aspect-ratio:1;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:clamp(14px,4vw,20px);font-weight:700;font-variant-numeric:tabular-nums;transition:all .12s;cursor:pointer; }
.nt-cell--fixed { background:var(--navy);color:var(--white);cursor:default; }
.nt-cell--empty { background:var(--bg-surface); }
.nt-cell--empty:hover { background:#d8d8e2; }
.nt-cell--filled { background:#c8c8d8;color:var(--navy); }
.nt-cell--selected { outline:3px solid var(--sky);outline-offset:-1px;animation:glow 1.3s ease infinite; }
.nt-cell--error { background:var(--error)!important;color:#fff!important;outline:none!important;animation:shake .35s ease; }
.nt-cell--correct { background:var(--teal);color:var(--white); }

.nt-input { display:flex;flex-wrap:wrap;gap:6px;justify-content:center;padding:0 0 12px;width:100%; }
.nt-num-btn { min-width:42px;height:44px;padding:0 8px;border-radius:8px;border:2px solid var(--border);background:var(--bg);color:var(--navy);font-size:16px;font-weight:700;cursor:pointer;font-family:var(--font);transition:all .12s; }
.nt-num-btn:hover { background:var(--bg-subtle); }
.nt-num-btn--used { opacity:.2;cursor:default; }
.nt-num-btn--selected { border-color:var(--sky);background:rgba(91,184,245,.1); }

.game-footer { display:flex;gap:18px;padding:10px 0 4px; }
.foot-btn { background:none;border:none;color:var(--text-mid);font-size:16px;font-weight:600;cursor:pointer;font-family:var(--font);padding:10px 14px; }
.foot-btn:hover { color:var(--navy); }

.win-card { background:var(--bg);border-radius:var(--radius-lg);padding:40px 48px;text-align:center;border:1.5px solid var(--border);box-shadow:0 12px 40px rgba(45,50,112,.12);animation:pop .45s ease; }
.win-check { width:68px;height:68px;border-radius:50%;margin:0 auto 16px;background:rgba(80,194,195,.15);border:3px solid var(--teal);display:flex;align-items:center;justify-content:center;font-size:30px;font-weight:700;color:var(--teal); }
.win-title { font-size:28px;font-weight:700;letter-spacing:4px;color:var(--navy);margin-bottom:16px; }
.win-btn { display:block;width:100%;padding:14px 0;border-radius:var(--radius-md);border:none;background:var(--navy);color:var(--white);font-size:13px;font-weight:700;letter-spacing:2px;cursor:pointer;font-family:var(--font);margin-bottom:8px; }
.win-btn--sec { background:var(--bg);border:1.5px solid var(--border);color:var(--text-dim);font-size:12px; }

@keyframes glow{0%,100%{box-shadow:0 0 0 0 rgba(91,184,245,.3)}50%{box-shadow:0 0 0 7px rgba(91,184,245,0)}}
@keyframes pop{0%{transform:scale(.85);opacity:0}60%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-4px)}40%{transform:translateX(4px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}