/* codex: 2026-09-23 模态弹窗系统：启发式教学、星阵故事、答案动态演示器、作答历史与规则图解 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 7, 15, 0.78);
  backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: #111827;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.75), 0 0 30px rgba(56, 189, 248, 0.15);
  width: 100%;
  max-width: 680px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(15px);
  transition: transform 0.25s ease;
}

.modal-overlay.active .modal-card {
  transform: translateY(0);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(17, 24, 39, 0.95);
}

.modal-header h3 {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}
.modal-close:hover {
  color: #ffffff;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 14px;
  line-height: 1.6;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: rgba(17, 24, 39, 0.95);
}

/* 答案演示播放器样式 */
.demo-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  background: rgba(10, 14, 26, 0.6);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.demo-select {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

.demo-progress-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.demo-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #0284c7, #38bdf8);
  transition: width 0.3s ease;
}

.demo-explanation-box {
  background: rgba(30, 41, 65, 0.45);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  line-height: 1.6;
  font-size: 14px;
}

/* 启发式教学样式 */
.teach-step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 6px;
}

.step-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  transition: all 0.2s;
}

.step-dot.active {
  background: var(--primary);
  color: #0a0e1a;
  box-shadow: 0 0 10px var(--primary-glow);
}

.teach-lead {
  font-size: 14.5px;
  color: #ffffff;
  line-height: 1.6;
}

.teach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.teach-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.teach-card h4 {
  font-size: 13.5px;
  color: var(--primary);
}

.teach-card ul {
  list-style: none;
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.teach-box {
  background: rgba(14, 165, 233, 0.1);
  border-left: 4px solid var(--primary);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.teach-box-title {
  font-weight: 700;
  color: #ffffff;
  font-size: 14px;
}

.teach-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.teach-compare-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.teach-compare-item h4 {
  color: #f87171;
  font-size: 13.5px;
  margin-bottom: 6px;
}

.teach-code-coords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.coord-tag {
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--primary);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-family: monospace;
}

.level-ladder {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ladder-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.ladder-card:hover, .ladder-card.active {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--primary);
}

.ladder-step {
  font-weight: 700;
  font-size: 13px;
  color: var(--primary);
  width: 70px;
}

.ladder-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ladder-info strong {
  color: #ffffff;
  font-size: 13px;
}

.ladder-info span {
  font-size: 11px;
  color: var(--text-dim);
}

.teach-tip {
  font-size: 12.5px;
  color: var(--accent-gold);
  background: rgba(234, 179, 8, 0.1);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

/* 剧情对白样式 */
.story-dialogue-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: rgba(10, 14, 26, 0.7);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-md);
  padding: 18px;
  min-height: 160px;
}

.story-speaker-tag {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  gap: 6px;
}

.story-text-body {
  font-size: 15px;
  color: #ffffff;
  line-height: 1.7;
  letter-spacing: 0.5px;
  flex: 1;
}

/* 历史与收藏表格 */
.history-table-wrap {
  overflow-x: auto;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.history-table th, .history-table td {
  padding: 9px 12px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.history-table th {
  color: var(--text-dim);
  font-weight: 600;
  background: rgba(0, 0, 0, 0.2);
}

.bookmark-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.bm-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bm-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bm-header h4 {
  font-size: 14px;
  color: #ffffff;
}

.bm-badge {
  font-size: 11px;
  background: rgba(56, 189, 248, 0.2);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
}

.bm-date {
  font-size: 11px;
  color: var(--text-dim);
}

.bm-actions {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

/* 移动端模态窗自适应 */
@media (max-width: 640px) {
  .modal-overlay {
    padding: 8px;
  }
  .modal-card {
    max-height: 95vh;
    border-radius: var(--radius-md);
  }
  .modal-header {
    padding: 12px 14px;
  }
  .modal-header h3 {
    font-size: 15px;
  }
  .modal-body {
    padding: 14px;
    font-size: 13px;
    gap: 12px;
  }
  .modal-footer {
    padding: 10px 14px;
    flex-wrap: wrap;
  }
  .modal-footer .btn {
    flex: 1;
    min-width: 70px;
    padding: 7px 8px;
    font-size: 12px;
  }
  .teach-compare {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .teach-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .demo-controls-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .demo-select {
    width: 100%;
  }
}