:root{
  --bg1:#0b1026;
  --bg2:#111a3a;
  --card:#0f1733cc;
  --stroke:#ffffff1a;
  --text:#f5f7ff;
  --muted:#c7cdfa;
  --accent:#7c5cff;
  --accent2:#2ee59d;
  --danger:#ff4d6d;
  --warn:#ffd166;

  --radius:22px;
  --shadow: 0 18px 60px rgba(0,0,0,.35);
  --tap: 54px;
  --maxw: 980px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple Color Emoji","Segoe UI Emoji";
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background: radial-gradient(1200px 800px at 20% 10%, #2a2c6b 0%, transparent 55%),
              radial-gradient(900px 700px at 80% 30%, #1d6b6b 0%, transparent 60%),
              linear-gradient(180deg, var(--bg1), var(--bg2));
  overflow-x:hidden;
}

.bg{position:fixed; inset:0; z-index:-2; overflow:hidden}
.blob{
  position:absolute;
  width:520px; height:520px;
  filter: blur(50px);
  opacity:.45;
  border-radius: 50%;
  transform: translate3d(0,0,0);
  animation: floaty 10s ease-in-out infinite;
}
.b1{left:-120px; top:-150px; background: #7c5cff;}
.b2{right:-160px; top:80px; background: #2ee59d; animation-duration: 13s;}
.b3{left:35%; bottom:-220px; background: #ff4d6d; animation-duration: 16s;}

@keyframes floaty{
  0%,100%{transform: translate(0,0) scale(1)}
  50%{transform: translate(30px, 22px) scale(1.06)}
}

.app{
  width:min(var(--maxw), calc(100% - 28px));
  margin: 18px auto 24px;
  display:flex;
  flex-direction:column;
  gap:14px;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding: 8px 6px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width: 220px;
}
.logo{
  width:46px; height:46px;
  border-radius:16px;
  display:grid;
  place-items:center;
  background: linear-gradient(135deg, var(--accent), #4dd7ff);
  box-shadow: var(--shadow);
  font-size: 24px;
  font-weight: 900;
}
.title{font-weight: 900; letter-spacing:.2px}
.subtitle{color:var(--muted); font-size: 13px}

.hud{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
}
.pill{
  display:flex;
  gap:10px;
  align-items:center;
  padding:10px 12px;
  border:1px solid var(--stroke);
  background: #0b1330b3;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0,0,0,.22);
}
.pill-label{color:var(--muted); font-size: 12px}
.pill-value{font-weight:800; font-variant-numeric: tabular-nums}

.card{
  border:1px solid var(--stroke);
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.screen.hidden{display:none}

h1{
  margin: 4px 0 8px;
  font-size: clamp(26px, 4vw, 40px);
  letter-spacing: -0.5px;
}
h2{
  margin: 18px 0 10px;
  font-size: 18px;
}

.lead{
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.35;
}

.cta-row{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  align-items:center;
  margin: 12px 0 6px;
}

.btn{
  min-height: var(--tap);
  padding: 12px 16px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: #0b1330;
  color: var(--text);
  font-weight: 800;
  letter-spacing: .2px;
  cursor: pointer;
  transition: transform .06s ease, filter .2s ease, background .2s ease, border-color .2s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.btn:active{transform: translateY(1px) scale(.99)}
.btn:focus{outline: 3px solid #ffffff33; outline-offset: 2px}

.btn-primary{
  border-color: #ffffff2a;
  background: linear-gradient(135deg, var(--accent), #4dd7ff);
  color:#0b1026;
}
.btn-ghost{
  background: #0b133080;
}

.podium{
  margin-top: 12px;
  padding-top: 4px;
}
.leaderboard{
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.leaderboard li{
  padding: 6px 0;
}
.leaderboard strong{color:var(--text)}

.question-wrap{
  display:flex;
  flex-direction:column;
  gap:8px;
  align-items:center;
  text-align:center;
  padding: 10px 0 12px;
}
.question-label{
  color: var(--muted);
  font-weight: 700;
}
.question-number{
  font-size: clamp(64px, 10vw, 96px);
  font-weight: 1000;
  letter-spacing: -2px;
  line-height: 1;
  padding: 10px 18px;
  border-radius: 22px;
  border: 1px solid var(--stroke);
  background: #0b133080;
  box-shadow: 0 18px 50px rgba(0,0,0,.25);
  min-width: min(360px, 100%);
}

.answers{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.answer{
  min-height: 72px;
  font-size: clamp(18px, 3.5vw, 26px);
  font-weight: 900;
  border-radius: 18px;
  background: #0b1330;
  border:1px solid var(--stroke);
  box-shadow: 0 10px 28px rgba(0,0,0,.22);
}
.answer.correct{
  background: linear-gradient(135deg, var(--accent2), #baffd7);
  color: #052016;
  border-color: #ffffff55;
}
.answer.wrong{
  background: linear-gradient(135deg, var(--danger), #ffb3c0);
  color: #2a0010;
  border-color: #ffffff55;
}
.answer.disabled{
  opacity:.85;
  filter: grayscale(.1);
  pointer-events:none;
}

.feedback{
  min-height: 28px;
  margin-top: 12px;
  text-align:center;
  font-weight: 900;
  letter-spacing: .2px;
}
.feedback.ok{color: #baffd7}
.feedback.no{color: #ffb3c0}

.bottom-row{
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:center;
  margin-top: 10px;
  flex-wrap:wrap;
}
.hint{
  color: var(--muted);
  font-size: 13px;
}

.footer{
  text-align:center;
  color: #c7cdfa99;
  font-size: 12px;
  padding: 4px 0 6px;
}

.confetti{
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index: 10;
}

@media (max-width: 720px){
  .answers{grid-template-columns: 1fr; }
  .answer{min-height: 68px}
  .question-number{min-width: 100%}
}