:root{
  --bg1: #8ab02a;
  --glass: rgba(227, 247, 227, 0.897);
  --accent1: #7f5af0;
  --accent2: #3bc9db;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;color:#e9f2ff}
body{background-color:var(--bg1);}
#app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px;background-image:linear-gradient(180deg, rgba(11,12,26,0.8), rgba(11,12,26,0.9)), url('galaxy-bg.jpg');background-size:cover;background-position:center}
.panel{width:100%;max-width:880px;padding:24px}
.auth-card, .quiz-card, .result-card{
  background:linear-gradient(180deg, rgba(173, 161, 243, 0.6), rgba(134, 102, 232, 0.55));
  border:1px solid rgba(255,255,255,0.1);
  padding:25px;
  border-radius:16px;
  backdrop-filter:blur(8px);
  box-shadow: 0 8px 20px rgba(198, 173, 173, 0.4);
}
.auth-card h2, .quiz-card h2{font-size:22px;margin-bottom:15px;text-align:center}
.auth-card .row, .quiz-card .row{display:flex;gap:12px;margin-top:12px;justify-content:center}
input{display:block;width:100%;padding:12px;border-radius:12px;border:1px solid rgba(255,255,255,0.08);background:rgba(255,255,255,0.02);color:#fff;margin-bottom:12px;font-size:16px}
.btn{
  background:linear-gradient(90deg,var(--accent2),var(--accent1));
  color:white;border:none;padding:12px 16px;border-radius:12px;cursor:pointer;transition:0.3s;
}
.btn:hover{background:linear-gradient(90deg,var(--accent1),var(--accent2));transform:scale(1.05);}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.1);}
.btn.google{background:#fff;color:#000}
.or{text-align:center;margin:10px 0;color:rgba(255,255,255,0.6);font-weight:bold}

.quiz-card .top{display:flex;flex-direction:column;gap:8px;margin-bottom:15px}
.progress{height:10px;background:linear-gradient(90deg,var(--accent1),var(--accent2));border-radius:999px;width:0;transition:0.3s}
.q{font-size:22px;margin:15px 0;font-weight:500}
.options{display:grid;gap:12px}
.opt{padding:14px;border-radius:12px;border:1px solid rgba(255,255,255,0.08);background:rgba(255,255,255,0.02);text-align:left;cursor:pointer;transition:0.3s}
.opt:hover{background:rgba(255,255,255,0.05)}
.opt.locked{opacity:0.9}
.opt.sel{box-shadow:0 8px 25px rgba(127,90,240,0.2)}
.opt.correct{border-color:rgba(16,185,129,0.5);background:rgba(16,185,129,0.08)}
.footer{display:flex;align-items:center;gap:10px;margin-top:15px}
.explain{margin-top:12px;color:rgba(255,255,255,0.85);font-style:italic;font-size:14px}

.big-score{font-size:52px;font-weight:700;margin:18px 0;text-align:center;color:#3bc9db}
.actions{display:flex;gap:14px;justify-content:center}

@media (max-width:700px){.panel{padding:12px}.big-score{font-size:38px}}