* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at top, #073b2c, #020806 65%);
  color: white;
  min-height: 100vh;
}

h1, h2, h3, p {
  margin-top: 0;
}

.center {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card,
.top-card,
.leaderboard {
  background: linear-gradient(180deg, #073b7a, #031c3d);
  border: 3px solid #d8a73a;
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 0 24px rgba(255, 204, 67, 0.25);
}

.card {
  width: 100%;
  max-width: 420px;
}

input {
  width: 100%;
  padding: 16px;
  margin-bottom: 12px;
  border-radius: 14px;
  border: 2px solid #12d6b0;
  font-size: 18px;
  outline: none;
}

button {
  border: none;
  border-radius: 16px;
  padding: 16px;
  font-size: 18px;
  font-weight: bold;
  background: #f2c94c;
  color: #082018;
  cursor: pointer;
  margin-bottom: 10px;
  width: 100%;
}

button:active {
  transform: scale(0.97);
}

.primary {
  background: linear-gradient(180deg, #ffd95a, #d99b19);
}

.danger {
  background: #d94b4b;
  color: white;
}

.admin-link {
  position: fixed;
  top: 12px;
  right: 12px;
  width: auto;
  padding: 10px 14px;
  font-size: 14px;
  z-index: 10;
}

.error {
  color: #ff7777;
  font-weight: bold;
}

.game,
.admin {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
}

.top-card {
  text-align: center;
  margin-bottom: 20px;
}

.answers {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.answers button {
  height: 140px;
  font-size: 48px;
  color: white;
  box-shadow: 0 8px 0 rgba(0,0,0,0.25);
}

.answers button:nth-child(1) {
  background: #d94b4b;
}

.answers button:nth-child(2) {
  background: #2374d9;
}

.answers button:nth-child(3) {
  background: #d9a323;
}

.answers button:nth-child(4) {
  background: #299447;
}

.leaderboard {
  margin-top: 20px;
}

.rank-item {
  background: rgba(255,255,255,0.1);
  padding: 14px;
  border-radius: 14px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.rank-item small {
  display: block;
  opacity: 0.75;
  margin-top: 4px;
}

.correct-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 480px) {
  .game,
  .admin {
    padding: 14px;
  }

  .answers button {
    height: 120px;
    font-size: 42px;
  }

  .card,
  .top-card,
  .leaderboard {
    padding: 18px;
  }
}