:root {
  --bg1: #0f172a;
  --bg2: #1e293b;
  --card: rgba(255,255,255,0.10);
  --card-2: rgba(255,255,255,0.08);
  --line: rgba(255,255,255,0.12);
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #38bdf8;
  --accent2: #8b5cf6;
  --good: #22c55e;
  --bad: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(56,189,248,0.18), transparent 25%),
    radial-gradient(circle at top right, rgba(139,92,246,0.18), transparent 25%),
    linear-gradient(135deg, var(--bg1), var(--bg2));
}

.page {
  padding: 24px;
}

.shell {
  width: min(1100px, 100%);
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 22px;
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.25);
}

.hero h1 {
  margin: 10px 0 12px;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.badge {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.10);
  color: #e2e8f0;
  font-size: 0.92rem;
}

h2, h3 {
  margin-top: 0;
}

input {
  width: 100%;
  padding: 14px 16px;
  margin-top: 10px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.08);
  color: white;
}

button {
  padding: 14px 16px;
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 700;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}

button.secondary {
  background: rgba(255,255,255,0.10);
  border: 1px solid var(--line);
}

.buttonRow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.status,
.statBox,
.questionCard,
.leaderboardTable,
.tableHead,
.tableRow {
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.status,
.statBox,
.questionCard,
.leaderboardTable {
  padding: 16px;
  margin-top: 14px;
}

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

.answers {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.answerBtn {
  width: 100%;
  text-align: left;
}

.answerBtn.correct {
  background: rgba(34,197,94,0.18);
  border: 1px solid rgba(34,197,94,0.5);
}

.answerBtn.wrong {
  background: rgba(239,68,68,0.18);
  border: 1px solid rgba(239,68,68,0.5);
}

.feedback {
  min-height: 28px;
  margin-top: 14px;
  color: var(--muted);
}

.hidden {
  display: none;
}

.muted {
  color: var(--muted);
}

.tableHead,
.tableRow {
  display: grid;
  grid-template-columns: 80px 1.5fr 100px 90px 90px 90px;
  gap: 10px;
  padding: 12px;
  margin-top: 8px;
}

@media (max-width: 920px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .battleTop {
    grid-template-columns: 1fr;
  }

  .tableHead,
  .tableRow {
    grid-template-columns: 60px 1fr 80px 70px 70px 70px;
    font-size: 0.92rem;
  }
}