:root{
  --bg: linear-gradient(180deg,#081224 0%,#071022 100%);
  --panel: rgba(255,255,255,0.04);
  --glass: rgba(255,255,255,0.03);
  --accent: #7afcff;
  --good: #6ee7a6; /* green */
  --mid: #ffd166;  /* yellow/orange */
  --bad: #a0a6b2;  /* grey */
  --glass-border: rgba(255,255,255,0.06);
  --glass-glow: 0 10px 30px rgba(122,252,255,0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg);
  color:#e8eef6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  display:flex;
  align-items:stretch;
  justify-content:center;
  padding:28px;
}

/* Main app container */
.app{
  width:100%;
  max-width:1100px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:14px;
  border:1px solid rgba(255,255,255,0.03);
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
  overflow:hidden;
  display:flex;
  flex-direction:column;
}

/* Topbar */
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:18px 20px;
  border-bottom:1px solid var(--glass-border);
  background: linear-gradient(180deg, rgba(255,255,255,0.01), transparent);
}
.brand{display:flex;align-items:center;gap:12px}
.brand__icon{font-size:28px}
.brand h1{font-size:18px;margin:0}
.controls{display:flex;gap:8px;align-items:center}
.btn{background:var(--panel);border:1px solid var(--glass-border);color:inherit;padding:8px 12px;border-radius:8px;cursor:pointer;transition:all 180ms ease}
.btn:hover{transform:translateY(-2px)}
.btn.icon{padding:8px}
.btn.primary{background:linear-gradient(90deg,var(--accent),#7bb7ff);color:#041021;border:none}

/* Main area */
.main{display:flex;gap:18px;padding:22px}
.game-stage{flex:1;display:flex;flex-direction:column;gap:18px}
.right-panel{width:300px}

/* Play area */
.play-area{
  background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02));
  border-radius:12px;padding:18px;border:1px solid rgba(255,255,255,0.02);
  display:flex;gap:18px;flex-direction:column;
  box-shadow: var(--glass-glow);
}

/* stats */
.game-info{display:flex;gap:12px}
.stat{background:var(--glass);padding:12px;border-radius:10px;border:1px solid var(--glass-border);min-width:120px;text-align:center}
.stat label{font-size:12px;color:#9fb0c7}
.stat .big{font-size:22px;font-weight:700;margin-top:6px}

/* bulbs */
.target-line{display:flex;flex-direction:column;align-items:center;gap:10px}
.bulb-row{display:flex;gap:14px}
.bulb{
  width:56px;height:56px;border-radius:12px;background:rgba(255,255,255,0.03);
  border:1px solid rgba(255,255,255,0.04);display:flex;align-items:center;justify-content:center;
  box-shadow: inset 0 -6px 20px rgba(0,0,0,0.6);
  transition:all 240ms cubic-bezier(.2,.9,.3,1);
  position:relative;overflow:hidden;
}
.bulb::after{content:'';position:absolute;inset:0;border-radius:inherit;mix-blend-mode:screen;opacity:0;transition:opacity .25s}
.bulb.good{background:linear-gradient(180deg, rgba(110,231,166,0.12), rgba(110,231,166,0.06));box-shadow:0 8px 30px rgba(110,231,166,0.06);border-color:rgba(110,231,166,0.2)}
.bulb.good::after{opacity:1;background:radial-gradient(circle at 30% 20%, rgba(110,231,166,0.48), transparent 30%)}
.bulb.mid{background:linear-gradient(180deg, rgba(255,209,102,0.12), rgba(255,209,102,0.04));border-color:rgba(255,209,102,0.18)}
.bulb.mid::after{opacity:1;background:radial-gradient(circle at 30% 20%, rgba(255,209,102,0.38), transparent 30%)}
.bulb.bad{opacity:0.8;background:linear-gradient(180deg, rgba(160,166,178,0.06), rgba(160,166,178,0.02));border-color:rgba(160,166,178,0.14)}

/* guess display */
.guess-display{font-size:28px;letter-spacing:10px;text-align:center;padding:12px 0;font-weight:700}

/* numpad */
.numpad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:400px;margin:0 auto}
.num-key,.action-key{padding:14px;border-radius:10px;background:rgba(255,255,255,0.02);border:1px solid var(--glass-border);cursor:pointer;font-size:18px}
.action-key.primary{background:linear-gradient(90deg,var(--accent),#7bb7ff);color:#041021;border:none}

/* quick actions */
.quick-actions{display:flex;gap:8px;justify-content:center;margin-top:10px}
.history{margin-top:12px;display:flex;flex-direction:column;gap:8px;max-height:240px;overflow:auto}
.history .row{display:flex;align-items:center;gap:10px;padding:10px;border-radius:8px;background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.02)}
.row .guess{min-width:86px;font-weight:700}
.row .feedback{display:flex;gap:8px;align-items:center}

/* hint colours inside history */
.hint-dot{width:12px;height:12px;border-radius:4px;display:inline-block}
.hint-correctpos{color:var(--good)}
.hint-correctdigit{color:var(--mid)}
.hint-absent{color:var(--bad)}

/* right panel cards */
.card{background:var(--panel);border:1px solid var(--glass-border);padding:14px;border-radius:10px;margin-bottom:12px}
.card h3{margin-top:0;font-size:16px}

/* message */
.message{margin:0;padding:8px;background:rgba(0,0,0,0.12);border-radius:8px}

/* footer */
.footer{border-top:1px solid var(--glass-border);padding:12px 18px;background:linear-gradient(180deg,transparent,rgba(255,255,255,0.01))}
.footer .footer-inner{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:#9fb0c7}

/* responsiveness */
@media (max-width:980px){
  .main{flex-direction:column}
  .right-panel{width:100%}
}

/* small helper animations */
.glow{animation:glow 1000ms infinite alternate}
@keyframes glow{from{filter:drop-shadow(0 0 6px rgba(122,252,255,0.08))}to{filter:drop-shadow(0 0 18px rgba(122,252,255,0.18))}}