/* ═══════════════════════════════════════════════
   Tetris — 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:360px;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;gap:12px;flex-wrap:wrap}
.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)}
.score-group{display:flex;flex-direction:column;align-items:center;gap:2px}
.score-label{font-size:9px;font-weight:600;letter-spacing:2px;color:var(--text-dim)}
.score-val{font-size:18px;font-weight:700;color:var(--navy);font-variant-numeric:tabular-nums}

.tetris-layout{display:flex;gap:16px;align-items:flex-start;justify-content:center;width:100%}
.tetris-board-wrap{border:2px solid rgba(45,50,112,0.12);border-radius:var(--radius-sm);overflow:hidden;background:var(--bg-subtle);line-height:0}
#tetrisCanvas{display:block}
.tetris-side{display:flex;flex-direction:column;gap:12px}
.next-box{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px;border-radius:var(--radius-md);background:var(--bg-subtle);border:1.5px solid var(--border)}
.next-label{font-size:9px;font-weight:600;letter-spacing:2px;color:var(--text-dim)}
#nextCanvas{display:block}

.touch-controls{display:flex;gap:10px;padding:8px 0;justify-content:center}
.ctrl-btn{width:60px;height:52px;border-radius:var(--radius-md);border:2px solid var(--border);background:var(--bg);color:var(--navy);font-size:20px;font-weight:600;cursor:pointer;font-family:var(--font);transition:all var(--transition);box-shadow:var(--shadow-sm);-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.ctrl-btn:active{background:var(--bg-subtle);transform:scale(0.95)}
.ctrl-btn--wide{width:140px;font-size:13px;letter-spacing:3px;height:44px}

.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;display:flex;align-items:center;justify-content:center;font-size:30px;font-weight:700}
.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}

.go-stats{display:flex;gap:24px;justify-content:center;margin-bottom:20px}
.go-stat{display:flex;flex-direction:column;align-items:center;gap:4px}
.go-stat-label{font-size:9px;font-weight:600;letter-spacing:2px;color:var(--text-dim)}
.go-stat-val{font-size:24px;font-weight:700;color:var(--navy)}

@keyframes pop{0%{transform:scale(.85);opacity:0}60%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}

/* Row clear flash */
@keyframes rowFlash{0%{opacity:1}50%{opacity:0}100%{opacity:1}}

@media(max-width:420px){
  .ctrl-btn{width:52px;height:46px;font-size:18px}
  .ctrl-btn--wide{width:120px;font-size:12px;height:40px}
  .tetris-layout{gap:10px}
  .next-box{padding:8px}
}