/* Violet C语言教程 - 正文样式：标题、段落、代码块、提示框 */
.content h1 {
  font-size: 1.75rem;
  margin-top: 0;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}
.content .lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}
.content h2 {
  font-size: 1.25rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
.content h3 {
  font-size: 1.1rem;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}
.content section { margin-bottom: var(--space-lg); }
.content p { margin: 0 0 var(--space-md); }
.content ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.5em;
}
.content li { margin-bottom: var(--space-xs); }

.content pre {
  margin: var(--space-md) 0;
}
.content pre code {
  font-size: 0.875rem;
  line-height: 1.5;
}
.content pre.flowchart-example {
  font-size: 0.8rem;
  line-height: 1.35;
  white-space: pre;
  overflow-x: auto;
}

/* 流程图：用 HTML+CSS 绘制，避免 Unicode 框线错位 */
.content .flowchart { font-size: 0.9rem; margin: var(--space-md) 0; }
.content .flowchart .flow-box {
  display: inline-block;
  border: 2px solid #333;
  padding: 6px 12px;
  border-radius: 4px;
  background: #fafafa;
  min-width: 4em;
  text-align: center;
}
.content .flowchart .flow-arrow { margin: 0 6px; color: #333; font-size: 1.1em; }
.content .flowchart .flow-arrow-down {
  text-align: center;
  margin: 0;
  color: #333;
  line-height: 1.2;
}
.content .flowchart .flow-connector-v {
  width: 2px;
  height: 12px;
  background: #333;
  margin: 2px auto;
}
.content .flowchart .flow-line-h { margin: 0 6px; color: #333; font-size: 1.1em; }
.content .flowchart .flow-diamond {
  display: inline-block;
  width: 0; height: 0;
  border: 24px solid transparent;
  border-top-color: #333;
  border-bottom-color: #333;
  position: relative;
  margin: 8px auto;
  box-sizing: content-box;
}
.content .flowchart .flow-diamond::before {
  content: attr(data-label);
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  font-size: 0.85rem;
  color: #333;
  width: 6em;
  text-align: center;
}
/* 菱形用四边形 + 旋转实现，便于中间写字 */
.content .flowchart .flow-diamond-wrap {
  display: block;
  width: 100px;
  height: 90px;
  margin: 6px auto;
  position: relative;
}
.content .flowchart .flow-diamond-wrap .flow-diamond-inner {
  position: absolute;
  width: 72px; height: 72px;
  left: 50%; top: 50%;
  margin-left: -36px; margin-top: -36px;
  border: 2px solid #333;
  background: #fafafa;
  transform: rotate(45deg);
  overflow: visible;
}
.content .flowchart .flow-diamond-wrap .flow-diamond-label {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.85rem;
  text-align: center;
  z-index: 1;
  white-space: nowrap;
  pointer-events: none;
}
.content .flowchart .flow-row { display: flex; justify-content: center; gap: 24px; margin: 8px 0; flex-wrap: wrap; }
.content .flowchart .flow-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}
.content .flowchart .flow-branch { display: flex; justify-content: center; gap: 40px; margin: 4px 0; color: #333; }
.content .flowchart .flow-branch-wrap { display: flex; flex-direction: column; align-items: center; }
.content .flowchart .flow-merge { text-align: center; margin: 4px 0; color: #555; }
.content .flowchart .flow-note { font-size: 0.8rem; color: #666; margin: 2px 0; }
.content .flowchart .flow-line-v {
  display: block;
  width: 2px;
  height: 12px;
  background: #333;
  margin: 0 auto 2px;
}
.content .flowchart .flow-connector-merge {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 2px 0;
}
.content .flowchart.flowchart-seq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 0;
}

/* 正文代码块与练习区 CodeMirror 统一高亮（与 Prism Tomorrow 一致：橙黄预处理器、绿头文件/字符串、紫红关键字、浅蓝数字、灰注释） */
.content pre code[class*="language-c"] .token.preprocessor,
.content pre code[class*="language-c"] .token.directive { color: #e6c07b !important; }
.content pre code[class*="language-c"] .token.keyword { color: #c678dd !important; }
.content pre code[class*="language-c"] .token.string { color: #98c379 !important; }
.content pre code[class*="language-c"] .token.number { color: #56b6c2 !important; }
.content pre code[class*="language-c"] .token.comment { color: #5c6370 !important; }
.content pre code[class*="language-c"] .token.function { color: #c678dd !important; }
.content pre code[class*="language-c"] .token.punctuation { color: #abb2bf !important; }
.content pre code[class*="language-c"] .token.attr-value { color: #7ec699 !important; }

/* 提示框：考点、游戏联想 */
.content .tip,
.content .summary {
  padding: var(--space-md) var(--space-lg);
  border-radius: 6px;
  margin: var(--space-lg) 0;
}
.content .tip {
  background: #e8f4fd;
  border-left: 4px solid #0d6efd;
}
.content .summary {
  background: #f0f0f5;
  border-left: 4px solid var(--color-primary);
}
.content .summary h2 { margin-top: 0; border-bottom: none; }

.intro { margin-bottom: var(--space-xl); }

/* 每章结束：返回上一章 + 继续下一章 */
.content .chapter-nav {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-md);
}
.content .chapter-nav a {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 6px;
  text-decoration: none;
}
.content .chapter-nav a:hover {
  background: var(--color-primary-light);
  text-decoration: none;
}
.content .chapter-nav .chapter-next-link { margin-left: auto; }

/* 易错知识 */
.content .pitfall {
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  border-radius: 6px;
  border-left: 4px solid #c00;
  background: #fff5f5;
}
.content .pitfall h2 { margin-top: 0; color: #a00; }

.chapter-list {
  list-style: none;
  padding-left: 0;
}
.chapter-list li { margin-bottom: var(--space-sm); }
.chapter-list a {
  display: inline-block;
  padding: var(--space-xs) 0;
}

/* 本节代码里的英文词 */
.content .vocab-box {
  margin: var(--space-md) 0 var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #fafafa;
}
.content .vocab-box h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1rem;
  color: var(--color-primary);
}
.content .vocab-box ul {
  margin: 0;
  padding-left: 1.25em;
}
.content .vocab-box li { margin-bottom: var(--space-xs); }

/* 职教高考例题 */
.content .exam-question {
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
}
.content .exam-question h3 {
  margin-top: 0;
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
  color: var(--color-primary);
}
.content .exam-question .answer {
  margin: var(--space-md) 0;
  padding: var(--space-sm) var(--space-md);
  background: #e8f5e9;
  border-left: 4px solid #2e7d32;
  font-weight: 600;
}
.content .exam-question .explain {
  margin: var(--space-sm) 0 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* 练习区域 */
.content .practice-area {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  border: 2px solid var(--color-primary);
  border-radius: 8px;
  background: #f8f9ff;
}
.content .practice-deepseek-badge {
  display: block;
  margin: -0.25rem 0 var(--space-md) 0;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.9rem;
  font-weight: 600;
  color: #1a5fb4;
  background: #dde8f7;
  border-radius: 6px;
  border-left: 4px solid var(--color-primary);
}
.content .practice-area h2,
.content .practice-area h3 { margin-top: 0; }
.content .practice-area .practice-tip {
  margin-bottom: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: #fff3cd;
  border-radius: 4px;
  font-size: 0.95rem;
}
.content .practice-code {
  display: block;
  width: 100%;
  min-height: 160px;
  margin: var(--space-sm) 0;
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  resize: vertical;
}
.content .practice-stdin {
  display: block;
  width: 100%;
  margin: var(--space-sm) 0;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}
.content .practice-actions { margin: var(--space-md) 0; }
.content .practice-run {
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
.content .practice-run:hover { background: var(--color-primary-light); }
.content .practice-output {
  margin-top: var(--space-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  white-space: pre-wrap;
  word-break: break-all;
  border-radius: 6px;
  background: #2d2d2d;
  color: #e0e0e0;
  min-height: 2.5em;
}
.content .practice-output--error { background: #3d2a2a; color: #ffb0b0; }
.content .practice-output--loading { position: relative; }
.content .practice-output--loading::first-line { color: #7ec699; }

.content .practice-deepseek-actions {
  margin: var(--space-sm) 0 var(--space-md) 0;
}
.content .practice-deepseek-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(180deg, #2d7ad1 0%, #1a5fb4 100%);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(26, 95, 180, 0.35);
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
}
.content .practice-deepseek-btn:hover:not(:disabled) {
  background: linear-gradient(180deg, #3d8ae0 0%, #2d7ad1 100%);
  box-shadow: 0 3px 10px rgba(26, 95, 180, 0.45);
  transform: translateY(-1px);
}
.content .practice-deepseek-btn:active:not(:disabled) { transform: translateY(0); }
.content .practice-deepseek-btn:disabled { opacity: 0.9; cursor: wait; }

.content .practice-deepseek-spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: practice-spin 0.7s linear infinite;
}
@keyframes practice-spin { to { transform: rotate(360deg); } }

/* CodeMirror 练习区：与正文代码块同色（背景 #2d2d2d、默认字 #e0e0e0、token 与 Prism 一致） */
.content .practice-area .CodeMirror {
  min-height: 180px;
  margin: var(--space-sm) 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.875rem;
  background: #2d2d2d !important;
  color: #e0e0e0 !important;
}
.content .practice-area .CodeMirror .CodeMirror-gutters {
  background: #2d2d2d !important;
  border-right: 1px solid #444;
  color: #5c6370;
}
.content .practice-area .CodeMirror .CodeMirror-linenumber { color: #5c6370; }
.content .practice-area .CodeMirror-wrap { border-radius: 6px; }
/* token 颜色：不依赖 .cm-s-tomorrow-night-bright，始终生效 */
.content .practice-area .CodeMirror .cm-meta,
.content .practice-area .CodeMirror .cm-keyword.cm-atom { color: #e6c07b !important; }
.content .practice-area .CodeMirror .cm-qualifier,
.content .practice-area .CodeMirror .cm-tag,
.content .practice-area .CodeMirror .cm-bracket { color: #7ec699 !important; }
.content .practice-area .CodeMirror .cm-keyword { color: #c678dd !important; }
.content .practice-area .CodeMirror .cm-def,
.content .practice-area .CodeMirror .cm-builtin { color: #c678dd !important; }
.content .practice-area .CodeMirror .cm-comment { color: #5c6370 !important; }
.content .practice-area .CodeMirror .cm-number { color: #56b6c2 !important; }
.content .practice-area .CodeMirror .cm-string { color: #98c379 !important; }
.content .practice-area .CodeMirror .cm-variable,
.content .practice-area .CodeMirror .cm-variable-2 { color: #e0e0e0 !important; }
.content .practice-area .CodeMirror .cm-operator,
.content .practice-area .CodeMirror .cm-punctuation { color: #e0e0e0 !important; }