/* ========== 竞技场模块样式 ========== */

/* 竞技场模式选择 */
.arena-modes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

.arena-mode-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.arena-mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--mode-color, var(--primary));
}

.arena-mode-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--mode-color, var(--primary));
}

.arena-mode-icon {
  font-size: 2.8rem;
  margin-bottom: 12px;
  display: block;
}

.arena-mode-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.arena-mode-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.arena-mode-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 12px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--mode-color, var(--primary)) 15%, transparent);
  color: var(--mode-color, var(--primary));
}

/* 竞技场设置区 */
.arena-settings {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.arena-settings-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}

.arena-form-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.arena-form-group {
  flex: 1;
  min-width: 200px;
}

.arena-form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.arena-form-group select,
.arena-form-group input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.arena-form-group select:focus,
.arena-form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.arena-btn-start {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--primary), #4a9af5);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.arena-btn-start:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--primary) 40%, transparent);
}

/* ===== 闯关模式 ===== */
.arena-stage-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.arena-stage-node {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 8px;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  position: relative;
}

.arena-stage-node:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.arena-stage-node.current {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 5%, transparent);
}

.arena-stage-node.cleared {
  border-color: var(--success);
}

.arena-stage-node.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.arena-stage-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.arena-stage-node.cleared .arena-stage-num {
  color: var(--success);
}

.arena-stage-node.locked .arena-stage-num {
  color: var(--text-muted);
}

.arena-stage-stars {
  font-size: 0.85rem;
  margin-top: 4px;
}

.arena-stage-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== BOSS挑战 ===== */
.arena-boss-card {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.arena-boss-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
  animation: bossGlow 3s ease-in-out infinite;
}

@keyframes bossGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(5%, 5%); }
}

.arena-boss-icon {
  font-size: 4rem;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.arena-boss-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.arena-boss-hp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.arena-hp-bar {
  width: 200px;
  height: 12px;
  background: rgba(255,255,255,0.2);
  border-radius: 6px;
  overflow: hidden;
}

.arena-hp-fill {
  height: 100%;
  background: linear-gradient(90deg, #ea4335, #ff6b6b);
  border-radius: 6px;
  transition: width 0.5s ease;
}

.arena-hp-text {
  font-size: 0.85rem;
  opacity: 0.9;
}

.arena-boss-skills {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
  position: relative;
  z-index: 1;
}

.arena-boss-skill {
  padding: 6px 14px;
  background: rgba(255,255,255,0.15);
  border-radius: 16px;
  font-size: 0.8rem;
  border: 1px solid rgba(255,255,255,0.2);
}

/* ===== 限时挑战 ===== */
.arena-timer-display {
  text-align: center;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.arena-timer-num {
  font-size: 4rem;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.arena-timer-num.warning {
  color: #fbbc04;
}

.arena-timer-num.danger {
  color: #ea4335;
  animation: timerPulse 0.5s ease-in-out infinite;
}

@keyframes timerPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.arena-timer-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

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

.arena-score-item {
  text-align: center;
}

.arena-score-val {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

.arena-score-lbl {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ===== 答题区（竞技场通用） ===== */
.arena-question-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 20px;
}

.arena-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.arena-q-progress {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.arena-q-tag {
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

.arena-q-content {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 20px;
}

.arena-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.arena-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
}

.arena-option:hover {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 5%, transparent);
}

.arena-option.selected {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.arena-option.correct {
  border-color: var(--success);
  background: color-mix(in srgb, var(--success) 10%, transparent);
}

.arena-option.wrong {
  border-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
}

.arena-option-letter {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.arena-option.selected .arena-option-letter {
  background: var(--primary);
  color: #fff;
}

.arena-option.correct .arena-option-letter {
  background: var(--success);
  color: #fff;
}

.arena-option.wrong .arena-option-letter {
  background: var(--danger);
  color: #fff;
}

/* ===== 竞技场结算 ===== */
.arena-result-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  text-align: center;
  margin-bottom: 20px;
}

.arena-result-icon {
  font-size: 4rem;
  margin-bottom: 16px;
}

.arena-result-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.arena-result-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.arena-result-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.arena-result-stat {
  padding: 12px;
  background: var(--bg);
  border-radius: var(--radius-sm);
}

.arena-result-stat-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.arena-result-stat-lbl {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.arena-result-stars {
  font-size: 2rem;
  margin-bottom: 16px;
}

.arena-result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* ===== 竞技场历史记录 ===== */
.arena-history-table {
  width: 100%;
  border-collapse: collapse;
}

.arena-history-table th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 10px 12px;
  text-align: left;
}

.arena-history-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.arena-history-table tr:hover td {
  background: var(--primary-light);
}

.arena-result-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: 600;
}

.arena-result-badge.win {
  background: color-mix(in srgb, var(--success) 15%, transparent);
  color: var(--success);
}

.arena-result-badge.lose {
  background: color-mix(in srgb, var(--danger) 15%, transparent);
  color: var(--danger);
}

/* 响应式 */
@media (max-width: 768px) {
  .arena-modes {
    grid-template-columns: 1fr;
  }

  .arena-stage-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .arena-result-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .arena-stage-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .arena-timer-num {
    font-size: 3rem;
  }
}
/* ========== 暗色模式适配 ========== */
[data-theme="dark"] .modal-overlay {
  background: rgba(0,0,0,0.7);
}
[data-theme="dark"] .modal-content {
  background: var(--bg-card);
  color: var(--text);
}
[data-theme="dark"] .history-table {
  color: var(--text);
}
[data-theme="dark"] .history-table td {
  color: var(--text-secondary);
}
[data-theme="dark"] .history-table tr:hover {
  background: #2a2a40;
}
[data-theme="dark"] input, [data-theme="dark"] select {
  background: var(--bg-input);
  color: var(--text);
  border-color: var(--border);
}
[data-theme="dark"] ::placeholder {
  color: var(--text-muted);
}