/* === 全局字体样式优化 === */

/* === 黑暗背景 === */
html {
  background-color: #3f3f66;
}

/* === 标题样式 === */
h1, h2, h3, h4 {
  color: #f0f0f0;
  border-bottom: 1px solid #444;
  padding-bottom: 4px;
}

/* 如果你特别喜欢绿色 h1，可改这一句： */
/* h1 { color: rgb(136, 199, 103); } */

/* === 链接样式 === */
a {
  color: #80d0ff;
}
a:hover {
  color: #ffcc70;
}

/* === 行内代码样式 === */
code {
  background-color: #333;
  color: #fffa;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Fira Code', monospace;
}

/* === 多行代码块美化 === */
pre code {
  background-color: #2a2a3d;
  color: #e8e8e8;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #444;
  display: block;
  overflow-x: auto;
  font-family: 'Fira Code', monospace;
}

/* === 表格样式 === */
table {
  border-collapse: collapse;
  width: 100%;
  margin-top: 1em;
}
table th, table td {
  border: 1px solid #555;
  padding: 8px;
  text-align: left;
}

/* === 阅读进度条 === */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(to right, #00c6ff, #0072ff);
  z-index: 9999;
  width: 0%;
  transition: width 0.1s ease-out;
}
/* === 正文段落居中排版 === */
section.chapter p {
  text-align: center;
}

/* 固定左侧导航栏，并设置宽度 */
nav.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 280px;  /* ✅ 左侧导航栏宽度 */
  overflow-y: auto;
  z-index: 1000;
}

/* 控制正文宽度 + 居中 + 避开导航栏 + 避开右侧目录 */
section.chapter {
  max-width: 980px !important;
  margin-left: 3000px;  /* ✅ 左边留出导航栏宽度+间距 */
  margin-right: 260px; /* ✅ 右边留出目录宽度+间距 */
  padding: 2rem;
  line-height: 1.8;
  font-size: 17px;
}

/* 右侧目录容器 */
.sidetoc {
  position: absolute;
  right: 0;
  top: 0;
}

.pagetoc {
  position: fixed;
  top: var(--menu-bar-height, 0);
  right: 20px;  /* ✅ 距离右边 20px */
  width: 220px; /* ✅ 目录宽度 */
  height: calc(100vh - var(--menu-bar-height, 0) - 2rem);
  overflow-y: auto;
  z-index: 1000;
}

/* 目录样式 */
.pagetoc a {
  border-left: 1px solid var(--sidebar-bg, #333);
  color: var(--fg, #e0e0e0) !important;
  display: block;
  padding: 5px 10px;
  text-align: left;
  text-decoration: none;
  font-size: 1.2rem;
}

.pagetoc a:hover,
.pagetoc a.active {
  background: var(--sidebar-bg, #333);
  color: var(--sidebar-fg, #fff) !important;
}

/* 不要再让 body 设置宽度和居中 */
body {
  font-family: "Segoe UI", "Noto Serif SC", serif;
  color: #e0e0e0;
  line-height: 1.8;
  font-size: 17px;
  background-color: #1e1e2f;
}




/* === 可折叠提示框样式 === */
details.note {
  background-color: #e0f7fa;
  border-left: 5px solid #00bcd4;
  border-radius: 6px;
  margin: 1.5em 0;
  padding: 1em 1em 0.5em;
  color: #004d40;
  font-size: 16px;
}

details.note summary {
  cursor: pointer;
  font-weight: bold;
  margin-bottom: 0.5em;
  color: #006064;
}

/* === 折叠框内代码块样式增强（配合已有样式可省略） */
details.note pre code {
  background-color: #e0f2f1;
  color: #004d40;
  border: 1px solid #80cbc4;
  border-radius: 6px;
  padding: 10px;
  display: block;
  overflow-x: auto;
  margin-top: 0.5em;
  font-family: 'Fira Code', monospace;
}


/* 添加进入动画的基本样式 */
details.note[open] {
  animation: fadeInSlide 0.3s ease-in-out;
}

@keyframes fadeInSlide {
  from {
    opacity: 0;
    transform: translateY(-5px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 鼠标移到 summary 上有 hover 效果 */
details.note summary:hover {
  color: #00acc1;
  transition: color 0.2s ease;
}




/* === 夜间模式专用霓虹呼吸分隔线 === */
.theme-separator-dark {
  border: none;
  height: 4px;
  margin: 3rem 0;
  background: linear-gradient(90deg, #00f0ff, #a200ff, #00f0ff);
  border-radius: 3px;
  box-shadow:
    0 0 8px #00f0ff,
    0 0 16px #a200ff,
    0 0 24px rgba(0, 240, 255, 0.6);
  animation: glow-pulse 2s infinite ease-in-out;
}

@keyframes glow-pulse {
  0%, 100% {
    opacity: 1;
    filter: brightness(1.2);
  }
  50% {
    opacity: 0.6;
    filter: brightness(1.6);
  }
}


/* 居中书名 */
header h1, 
.book-title, 
.navbar-brand {
  text-align: center !important;
  width: 100%;
  display: block;
  margin: 0 auto;
}