:root{
  --bg: #0f1226;
  --panel: #171a36;
  --panel-2: #0e1027;
  --accent: #7dd3fc; /* cyan-300 */
  --accent-2: #22d3ee; /* cyan-400 */
  --snake: #a3e635; /* lime-400 */
  --snake-head: #bef264; /* lime-300 */
  --food: #fb7185; /* rose-400 */
  --grid: rgba(255,255,255,.06);
  --text: #e5e7eb; /* gray-200 */
  --muted: #9ca3af; /* gray-400 */
  --ov-glow: rgba(34, 211, 238, .35);
  --ov-shadow: rgba(0,0,0,.55);
}

*{box-sizing:border-box}
html,body{height:100%;}
body{
  margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 70% -10%, #1b1f49 0%, transparent 50%),
              radial-gradient(1000px 600px at 10% 110%, #0c0f2a 0%, transparent 50%),
              var(--bg);
  display:flex; align-items:center; justify-content:center; padding:24px;
}

.wrap{ width:min(100%, 980px); display:grid; gap:16px; grid-template-columns: 1fr; }

.top{
  display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  border:1px solid rgba(255,255,255,.06);
  padding:10px 12px; border-radius:16px; box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

.brand{ display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.2px; }
.brand .dot{ width:10px; height:10px; border-radius:999px; background: var(--accent-2); box-shadow:0 0 10px var(--accent-2), 0 0 22px var(--accent-2);}

.stats{ display:flex; align-items:center; gap:16px; flex-wrap:wrap; }
.badge{ background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.08); padding:6px 10px; border-radius:10px; font-size:14px; }
.badge strong{ color: var(--accent); }

.game{
  display:grid; grid-template-columns: 1fr; gap:16px;
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  border:1px solid rgba(255,255,255,.06);
  padding:16px; border-radius:18px; box-shadow: 0 20px 60px rgba(0,0,0,.45);
}

.stage{
  position:relative;
  aspect-ratio: 1 / 1; /* carré réactif */
  max-height: 70vh; /* garde de la place pour les contrôles */
  background: #0a0c22; border-radius:14px; overflow:hidden; border:1px solid rgba(255,255,255,.08);
}

canvas{ width:100%; height:100%; display:block; image-rendering: pixelated; }

/* -------- Overlay: 3D isométrique + animation -------- */
.overlay{
  position:absolute; inset:0; display:grid; place-items:center;
  /* Animation state */
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease;
  perspective: 900px; /* nécessaire au rendu 3D */
}
.overlay[data-state="visible"]{
  opacity: 1;
  pointer-events: auto;
}

.overlay .msg{
  position: relative;
  background: radial-gradient(120% 140% at 20% 10%, rgba(255,255,255,.06), rgba(0,0,0,.65)),
              linear-gradient(180deg, rgba(20,24,54,.9), rgba(9,11,30,.9));
  border:1px solid rgba(255,255,255,.12);
  padding:16px 22px; border-radius:16px;
  text-align:center; line-height:1.35;
  color: var(--text);
  transform-style: preserve-3d;
  /* Position de départ (isométrique) */
  transform: rotateX(22deg) rotateY(-18deg) translateY(8px) scale(.96);
  transition: transform .32s cubic-bezier(.2,.8,.2,1), filter .32s ease;
  /* Ombres multi-couches pour relief */
  box-shadow:
    0 10px 24px var(--ov-shadow),
    0 1px 0 rgba(255,255,255,.06) inset,
    0 0 0 1px rgba(255,255,255,.05);
  filter: drop-shadow(0 10px 20px rgba(0,0,0,.35)) drop-shadow(0 0 24px var(--ov-glow));
}
.overlay[data-state="visible"] .msg{
  transform: rotateX(0) rotateY(0) translateY(0) scale(1);
}

/* Faux "épaisseur" isométrique via pseudo-éléments */
.overlay .msg::before,
.overlay .msg::after{
  content:""; position:absolute; inset:0; border-radius:16px; pointer-events:none;
}
/* Arête cyan douce */
.overlay .msg::before{
  background: linear-gradient(180deg, transparent, rgba(34,211,238,.08));
  transform: translateZ(-8px) translate(6px, 10px);
  filter: blur(.3px);
}
/* Ombre portée */
.overlay .msg::after{
  transform: translate(10px, 16px);
  background: radial-gradient(50% 50% at 50% 50%, rgba(0,0,0,.5), transparent 70%);
  opacity:.6;
  z-index:-1;
}

.overlay h2{ margin:0 0 6px; font-size:22px; font-weight:800; letter-spacing:.2px; }
.overlay p{ margin:0; font-size:13px; color:var(--muted); }

.controls{
  display:grid; gap:10px; grid-template-columns: repeat(3, 1fr);
  align-self:center; width:min(360px, 70%); margin: 0 auto;
  user-select:none; -webkit-user-select:none;
}
.controls button{
  appearance:none; border:none; cursor:pointer; padding:14px; border-radius:14px;
  background:linear-gradient(180deg, #1b1f49, #13163a);
  border:1px solid rgba(255,255,255,.08);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.07), 0 6px 18px rgba(0,0,0,.35);
  color:var(--text); font-weight:700; font-size:18px;
  transition: transform .05s ease;
  touch-action: manipulation;
}
.controls button:active{ transform: translateY(2px); }
.controls .empty{ visibility:hidden; }

.help{ text-align:center; color:var(--muted); font-size:14px; }
.help kbd{ background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.08); padding:2px 6px; border-radius:6px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; color:var(--text); }

.hidden{ display:none !important; }

.card{
  background: rgba(15, 19, 46, .85);
  border:1px solid rgba(255,255,255,.06);
  border-radius:14px;
  padding:14px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}

.card h3{
  margin:0 0 10px;
  font-size:16px;
  letter-spacing:.2px;
}

.account-card form{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.account-card label{
  display:flex;
  flex-direction:column;
  gap:4px;
  font-size:13px;
  color:var(--muted);
}

.account-card input{
  appearance:none;
  border:1px solid rgba(255,255,255,.1);
  background: rgba(8,10,30,.9);
  color: var(--text);
  border-radius:10px;
  padding:8px 10px;
  font-size:14px;
}

.account-card button{
  appearance:none;
  border:none;
  border-radius:10px;
  padding:10px 12px;
  background:linear-gradient(180deg, #1b1f49, #13163a);
  color:var(--text);
  font-weight:600;
  cursor:pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 6px 16px rgba(0,0,0,.35);
  transition: transform .05s ease;
}

.account-card button:active{ transform: translateY(1px); }
.account-card button:disabled{
  opacity:.6;
  cursor: not-allowed;
}

.link-btn{
  background:none !important;
  box-shadow:none !important;
  color:var(--accent);
  padding:0 !important;
  text-align:left;
  font-size:13px;
  text-decoration:underline;
}

.auth-msg{
  min-height:18px;
  font-size:12px;
  color:var(--muted);
  margin:0;
}

.account-card p{ margin:6px 0 0; }

.leaderboard ol{
  margin:0;
  padding-left:18px;
  display:flex;
  flex-direction:column;
  gap:4px;
  font-size:14px;
}

.leaderboard li{
  display:flex;
  justify-content:space-between;
  gap:12px;
}

.leaderboard li.self{
  color:var(--accent);
}

.leaderboard li.self strong{
  color:var(--accent-2);
}

.leaderboard li.empty{
  color:var(--muted);
  font-size:13px;
}

.leaderboard strong{ color:var(--accent); }

.board-stats{
  margin:10px 0 0;
  font-size:12px;
  color:var(--muted);
}

@media (min-width: 860px){
  .game{ grid-template-columns: 1fr 240px; align-items:center; }
  .side{ display:flex; flex-direction:column; gap:12px; }
  .controls{ width:100%; }
}