:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --card: #0f3460;
  --accent: #e94560;
  --accent2: #f5a623;
  --text: #eaeaea;
  --text-muted: #8892a4;
  --correct: #2ecc71;
  --wrong: #e74c3c;
  --radius: 12px;
  --font: 'Nunito', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 8px;
}

/* Screen Management */
.screen { display: none; }
.screen.active { display: block; }

.name-input-block {
  margin: 16px 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

#player-name {
  padding: 8px 12px;
  font-size: 1.1rem;
  border-radius: 8px;
  border: 2px solid var(--accent);
  background: var(--surface);
  color: var(--text);
  outline: none;
}

#player-name:focus {
  border-color: var(--accent2);
}

/* Set Selection Cards */
.sets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.set-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
  border: 2px solid transparent;
}

.set-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.set-card.extra {
  border-color: var(--accent2);
  background: linear-gradient(135deg, #1a1a2e, #2d1f00);
}

.set-label { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.set-bonus { color: var(--accent2); font-weight: 900; font-size: 1.1rem; margin-top: 8px; }

/* Tasks Grid */
.tasks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
  margin: 12px 0;
}

.task-cell {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 2px solid transparent;
}

.task-cell.correct { border-color: var(--correct); background: rgba(46,204,113,0.1); }
.task-cell.wrong   { border-color: var(--wrong);   background: rgba(231,76,60,0.1); }

.task-text { font-size: 1.1rem; font-weight: 700; white-space: nowrap; }

.answer-input {
  width: 64px;
  padding: 6px;
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  background: var(--card);
  color: var(--text);
  border: 2px solid var(--accent);
  border-radius: 8px;
  outline: none;
}

.answer-input:focus { border-color: var(--accent2); box-shadow: 0 0 0 3px rgba(245,166,35,0.2); }

/* Hide arrows in number input */
.answer-input::-webkit-inner-spin-button,
.answer-input::-webkit-outer-spin-button { -webkit-appearance: none; }

/* Game Header and Timer */
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
  flex-wrap: wrap;
}

.game-title {
  font-size: 1.5rem;
  font-weight: bold;
}

.timer {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent2);
  min-width: 80px;
  text-align: center;
  transition: color 0.3s;
}

.timer.timer-danger {
  color: var(--wrong);
  animation: pulse 0.5s infinite alternate;
}

@keyframes pulse {
  from { transform: scale(1); }
  to   { transform: scale(1.1); }
}

/* Buttons */
.btn-primary, .btn-secondary {
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-secondary {
  background: var(--card);
  color: var(--text);
  border: 2px solid var(--accent);
}

.btn-primary:hover, .btn-secondary:hover { transform: scale(1.03); opacity: 0.9; }

/* Result and Badges */
.score-big {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent2);
  text-align: center;
}

.score-detail {
  font-size: 1.2rem;
  margin-bottom: 24px;
}

.result-actions {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  justify-content: center;
}

.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 8px 12px;
  margin: 4px;
  cursor: pointer;
}

.badge-emoji { font-size: 1.5rem; }
.badge-label { font-weight: 700; font-size: 1rem; }

.answer-shown { display: inline-block; min-width: 30px; text-align: center; }
.answer-correct { color: var(--correct); font-weight: 700; }
.answer-wrong   { color: var(--wrong);   font-weight: 700; }

/* Leaderboard Table */
.filters {
  display: flex;
  gap: 12px;
  margin: 16px 0;
  overflow-x: auto;
  padding-bottom: 8px;
}

.filter-btn {
  background: var(--card);
  color: var(--text);
  border: 2px solid var(--card);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 700;
  transition: all 0.2s;
}

.filter-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

#leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

#leaderboard-table th,
#leaderboard-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--card);
}

#leaderboard-table th {
  background: var(--card);
  font-weight: 700;
}

#leaderboard-table tr:hover td { background: rgba(255,255,255,0.03); }

.leaderboard-badge {
  cursor: help;
  display: inline-block;
  margin: 0 2px;
  transition: transform 0.2s;
}

.leaderboard-badge:hover {
  transform: scale(1.3);
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .tasks-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .score-big { font-size: 2rem; }

  .game-header { flex-direction: column; align-items: flex-start; }

  #leaderboard-table th:nth-child(8),
  #leaderboard-table td:nth-child(8) { display: none; } /* hide date on small screens */
}