/* AI_TAG: FRONTEND_COMPONENT | Pige48 theme and layout */
:root{
  --bg:#0b1016; --panel:#0f1724; --panel-2:#111b29; --line:#1a2a3f; --glow:#4da3ff;
  --tile:#132033; --tile-2:#1a2b44; --tile-3:#223a5a; --text:#eaf2ff; --muted:#bcd8ff;
}
body{background:var(--bg);color:var(--text)}
#pige48-wrap{max-width:980px;margin:0 auto;padding:16px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.title{display:flex;gap:12px;align-items:center}
.title h1{margin:0;font-size:28px;letter-spacing:.5px}
.title .sub{opacity:.85;font-size:13px}
.title .text{display:flex;flex-direction:column}
.title .cover{width:86px;height:54px;border-radius:10px;border:1px solid #204466;box-shadow:0 4px 18px #0009}
.stats{display:flex;gap:8px}
.chip{background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid #183252;padding:8px 10px;border-radius:10px;font-weight:800;color:var(--muted);box-shadow:inset 0 1px 0 #1b2c44, 0 4px 16px #0008}
.chip span{color:#fff;margin-left:6px}
.main{display:grid;grid-template-columns:1fr 240px;gap:16px}

#boardWrap{position:relative}
#board{position:relative;width:min(90vw, 640px);height:min(90vw, 640px);max-width:640px;max-height:640px;margin:auto;background:linear-gradient(180deg,#0f1928,#0d1724);border-radius:16px;border:1px solid #183252;box-shadow:0 10px 40px #0008, inset 0 1px 0 #1b2c44;padding:12px;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:10px}
.cell{background:linear-gradient(180deg,#122036,#0f1a2b);border:1px solid #1a3150;border-radius:12px;box-shadow:inset 0 2px 0 #1b2c44}
.tile{position:absolute;display:flex;align-items:center;justify-content:center;font-weight:1000;font-size:28px;color:#fff;text-shadow:0 2px 0 #0006, 0 8px 24px #000b;user-select:none;will-change:transform,opacity;transition:transform .14s ease}
.tile-inner{width:100%;height:100%;border-radius:12px;border:1px solid #1a3150;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#113256,#0d223a)}
.tile.p{background:none}
.tile.spawn{animation:pop .14s ease-out}
.tile.merge{animation:thump .12s ease-out}
.tile.fly{animation:wing 1.4s ease-in-out infinite}
@keyframes pop{from{transform:scale(.7);opacity:.4}to{transform:scale(1);opacity:1}}
@keyframes thump{0%{transform:scale(1)}50%{transform:scale(1.08)}100%{transform:scale(1)}}
@keyframes wing{0%{transform:translateY(0)}50%{transform:translateY(-2px)}100%{transform:translateY(0)}}

/* Value color ramp */
.v2  { --c:#7ecbff; }
.v4  { --c:#6fd1ff; }
.v8  { --c:#57c0ff; }
.v16 { --c:#4da3ff; }
.v32 { --c:#7dd4ff; }
.v64 { --c:#8fe2ff; }
.v128{ --c:#b0f0ff; }
.v256{ --c:#c4f5ff; }
.v512{ --c:#e8fbff; color:#0a1b2e }
.v1024{ --c:#ffe28a; color:#0a1b2e }
.v2048{ --c:#ffc44d; color:#0a1b2e }
.tile .tile-inner{background:linear-gradient(180deg,color-mix(in srgb,var(--c) 24%, #0d223a), color-mix(in srgb,var(--c) 6%, #0b1826));border-color:color-mix(in srgb,var(--c) 35%, #1a3150)}

/* Overlay */
#overlay{position:absolute;inset:0;background:linear-gradient(180deg,#06101cbb,#07121fcc);backdrop-filter:blur(4px);border-radius:16px;border:1px solid #183252;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;box-shadow:inset 0 1px 0 #1b2c44}
#overlay.hidden{display:none}
#overlayContent{font-weight:1000;font-size:28px;text-align:center}
.overlay-actions{display:flex;gap:8px}
.btn{background:linear-gradient(180deg,#11243b,#0d1d30);color:#cfe9ff;border:1px solid #1a3150;border-radius:10px;padding:8px 12px;font-weight:800;cursor:pointer}
.btn.pri{background:linear-gradient(180deg,#2370bd,#1a4e86);border-color:#2b78c4;color:white;box-shadow:0 6px 24px #1a4e8677}
.btn:active{transform:translateY(1px)}
.side{display:flex;flex-direction:column;gap:8px}
.hint{opacity:.8;font-size:12px}

/* Responsive: stack side below on small screens */
@media (max-width: 920px){
  .main{grid-template-columns:1fr}
  #board{width:min(94vw,580px);height:min(94vw,580px)}
}