:root{--neon1:#22d3ee;--neon2:#a78bfa;--panel:#0b1220;--panel2:#101a2f}
body{background:radial-gradient(circle at 20% 20%,#1a2945 0,#090d14 42%,#06080d 100%)}
.memory-card{background:linear-gradient(150deg,var(--panel2),var(--panel));border:1px solid #2c3f63;border-radius:20px;box-shadow:0 20px 45px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.04)}
.badge{color:#67e8f9;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase}
.title{font-size:2rem;font-weight:900;margin:6px 0 14px;background:linear-gradient(90deg,#67e8f9,#c4b5fd,#f9a8d4);-webkit-background-clip:text;background-clip:text;color:transparent}
.top-ui{display:flex;gap:10px;flex-wrap:wrap;align-items:end}
.top-ui label{display:grid;gap:6px;font-size:.9rem}
.top-ui input,.top-ui select{background:#0b0f14;border:1px solid #44577a;border-radius:12px;padding:9px 10px;color:#e2e8f0;min-width:130px}
#timer{font-weight:800;color:#facc15;text-shadow:0 0 10px rgba(250,204,21,.3);padding:8px 12px;border:1px solid #665218;border-radius:12px;background:#1d1a0f}
#startBtn{position:relative;overflow:hidden;border:0;background:linear-gradient(90deg,#06b6d4,#8b5cf6,#ec4899);color:#fff;font-weight:800;padding:10px 16px;border-radius:12px;box-shadow:0 0 0 2px rgba(255,255,255,.1),0 8px 20px rgba(139,92,246,.4);animation:pulseGlow 1.6s infinite}
#startBtn::after{content:'';position:absolute;inset:-40% auto -40% -45%;width:35%;transform:rotate(20deg);background:linear-gradient(transparent,rgba(255,255,255,.65),transparent);animation:shine 1.8s linear infinite}
@keyframes pulseGlow{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}}
@keyframes shine{to{left:120%}}

.board{margin-top:16px;display:grid;gap:10px;grid-template-columns:repeat(5,1fr);align-items:stretch;perspective:1000px}
.board.normal{grid-template-columns:repeat(4,1fr)}
.game-card{width:100%;aspect-ratio:3/4;position:relative;-webkit-transform-style:preserve-3d;transform-style:preserve-3d;transition:transform .35s;cursor:pointer;border:0;background:transparent;padding:0;transform:rotateY(0deg)}
.game-card.flipped{transform:rotateY(180deg)}
.face{display:block;position:absolute;inset:0;border-radius:12px;-webkit-backface-visibility:hidden;backface-visibility:hidden;background-size:contain;background-repeat:no-repeat;background-position:center;border:1px solid #1f2937;box-shadow:0 6px 8px rgba(0,0,0,.35), inset 0 0 0 1px rgba(255,255,255,.05);background-color:#0b1220;transform:rotateY(0deg)}
.back{transform:rotateY(0deg)}
.front{transform:rotateY(180deg) translateZ(1px)}
.sub{color:#94a3b8;margin-top:10px}
.section-title{font-size:1.2rem;font-weight:800;color:#e2e8f0}
.rank-table{width:100%;margin-top:10px;border-collapse:separate;border-spacing:0 6px}
.rank-table th{font-size:.82rem;color:#7dd3fc;text-transform:uppercase;letter-spacing:.06em;text-align:left;padding:6px 8px}
.rank-table td{padding:9px 8px;background:#0d1728;border-top:1px solid #24324d;border-bottom:1px solid #24324d}
.rank-table td:first-child{border-left:1px solid #24324d;border-radius:10px 0 0 10px}
.rank-table td:last-child{border-right:1px solid #24324d;border-radius:0 10px 10px 0}
.share-row{display:flex;gap:10px;align-items:center;margin-top:10px}

@media (max-width: 900px){
  .title{font-size:1.55rem}
  .board{gap:8px}
}
@media (max-width: 640px){
  .top-ui{gap:8px}
  .top-ui input,.top-ui select{min-width:110px}
  .board{gap:6px}
  .face{border-radius:10px}
}

.auth-row{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-top:10px}
#rankingActionBtn:disabled{opacity:.6;cursor:not-allowed}