:root{
  --bg1: #ffefef;
  --bg2: #fff7f0;
  --accent: #ff3b6b;
  --accent2: #ff8fb2;
  --glass: rgba(255,255,255,0.6);
}
*{box-sizing:border-box;font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial; }
html,body{height:100%;margin:0;overflow:hidden;background: linear-gradient(180deg,var(--bg1),var(--bg2)), url('couple_bg_blur.jpg') center/cover no-repeat fixed;}
#ui{position:fixed;left:16px;top:12px;z-index:10;color:#6b2230;text-shadow:0 1px 0 rgba(255,255,255,0.6);}
#title{font-weight:700;font-size:20px;display:flex;align-items:center;gap:8px}
#title span{font-size:20px;line-height:1}
#subtitle{font-size:12px;opacity:0.9;margin-top:4px}
#score,#best{margin-top:8px;background:var(--glass);padding:6px 10px;border-radius:999px;display:inline-block;font-weight:600}
#controls{margin-top:10px;display:flex;gap:8px;align-items:center}
button{background:linear-gradient(180deg,white,rgba(255,255,255,0.9));border:1px solid rgba(0,0,0,0.06);padding:8px 12px;border-radius:10px;font-weight:700;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,0.06)}
button:active{transform:translateY(1px)}
.select, select{padding:6px;border-radius:8px;border:1px solid rgba(0,0,0,0.08)}
#game{position:fixed;inset:0;width:100%;height:100%;display:block;}

/* overlay */
#overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,rgba(0,0,0,0.15),rgba(0,0,0,0.05));z-index:20}
#overlay.hidden{display:none}
#panel{background:linear-gradient(180deg,rgba(255,255,255,0.9),rgba(255,255,255,0.8));padding:28px;border-radius:16px;box-shadow:0 20px 50px rgba(0,0,0,0.12);min-width:260px;text-align:center}
#panel h1{margin:0 0 6px 0;font-size:20px;color:#6b2230}
#panel p{margin:0 0 12px 0;color:#333;opacity:0.85}
#panel button{width:100%}

/* premium hearts in corner */
body::after{
  content:'';position:fixed;right:14px;bottom:14px;width:140px;height:140px;border-radius:16px;background:linear-gradient(135deg,var(--accent),var(--accent2));opacity:0.12;filter:blur(12px);
}
.small{font-size:12px;opacity:0.9}

@media (min-width:900px){
  #title{font-size:24px} 
}