/* 个人投资者量化教程 - 电子书与移动端排版增强样式 */

:root {
  --quant-math-font: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "STIX Two Math", "Cambria Math",
    "Apple Symbols", "Segoe UI Symbol", "Noto Sans Math", sans-serif;
}

/* 保证 Unicode 组合字符（如 ˆβ, ¯R, Σₜ₌₁ⁿ, √252）在 iOS / Windows / macOS 清晰对齐 */
.md-typeset {
  font-family: var(--quant-math-font);
  line-height: 1.78;
  font-size: 0.84rem;
  letter-spacing: 0.01em;
}

/* 顶部实时阅读进度细线 */
#quant-top-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #5c6bc0, #26c6da);
  z-index: 9999;
  transition: width 0.15s ease-out;
  pointer-events: none;
}

/* 首页与总览页的「继续上次阅读」横幅卡片 */
.quant-reading-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  margin: 1rem 0 1.4rem;
  padding: 1rem 1.25rem;
  border-radius: 0.6rem;
  border: 1px solid rgba(63, 81, 181, 0.28);
  background: rgba(63, 81, 181, 0.06);
}

[data-md-color-scheme="slate"] .quant-reading-card {
  border-color: rgba(140, 158, 255, 0.28);
  background: rgba(140, 158, 255, 0.09);
}

.quant-reading-card__eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--md-primary-fg-color);
  margin-bottom: 0.2rem;
}

[data-md-color-scheme="slate"] .quant-reading-card__eyebrow {
  color: #8c9eff;
}

.quant-reading-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--md-typeset-color);
  margin-bottom: 0.25rem;
}

.quant-reading-card__section {
  font-weight: 400;
  font-size: 0.86rem;
  opacity: 0.82;
}

.quant-reading-card__stats {
  font-size: 0.76rem;
  opacity: 0.85;
}

/* 章节顶部的进度与已读标记工具条 */
.quant-article-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: -0.35rem 0 1.1rem;
  padding: 0.45rem 0.75rem;
  border-radius: 0.45rem;
  background: rgba(128, 128, 128, 0.07);
  font-size: 0.76rem;
}

.quant-article-toolbar__status {
  font-weight: 600;
  opacity: 0.88;
}

/* 按钮样式 */
.quant-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.95rem;
  border-radius: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none !important;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.12s ease, background-color 0.15s ease;
  border: 1px solid transparent;
}

.quant-btn--primary {
  background: var(--md-primary-fg-color);
  color: #ffffff !important;
}

.quant-btn--primary:hover {
  opacity: 0.92;
}

.quant-btn--small {
  padding: 0.22rem 0.65rem;
  font-size: 0.72rem;
}

.quant-btn--outline {
  background: transparent;
  border-color: rgba(128, 128, 128, 0.38);
  color: var(--md-typeset-color);
}

.quant-btn--done {
  background: rgba(46, 125, 50, 0.16);
  border-color: rgba(46, 125, 50, 0.45);
  color: #2e7d32;
}

[data-md-color-scheme="slate"] .quant-btn--done {
  color: #81c784;
  border-color: rgba(129, 199, 132, 0.45);
}

/* 侧边栏章节已读 / 百分比徽章 */
.quant-nav-badge {
  display: inline-block;
  margin-left: auto;
  padding: 0.05rem 0.38rem;
  border-radius: 999px;
  font-size: 0.64rem;
  font-weight: 600;
  line-height: 1.35;
  flex-shrink: 0;
}

.quant-nav-badge--done {
  background: rgba(46, 125, 50, 0.16);
  color: #2e7d32;
}

[data-md-color-scheme="slate"] .quant-nav-badge--done {
  background: rgba(129, 199, 132, 0.18);
  color: #81c784;
}

.quant-nav-badge--progress {
  background: rgba(63, 81, 181, 0.12);
  color: var(--md-primary-fg-color);
}

[data-md-color-scheme="slate"] .quant-nav-badge--progress {
  background: rgba(140, 158, 255, 0.16);
  color: #8c9eff;
}

/* 恢复阅读位置底部浮动轻提示 */
.quant-resume-toast {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  left: auto;
  max-width: calc(100vw - 2rem);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.95rem;
  border-radius: 0.5rem;
  background: rgba(30, 33, 41, 0.94);
  color: #ffffff;
  font-size: 0.76rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  z-index: 9998;
}

.quant-resume-toast__top {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border: none;
  border-radius: 0.3rem;
  padding: 0.22rem 0.55rem;
  font-size: 0.72rem;
  cursor: pointer;
  white-space: nowrap;
}

/* 习题参考答案 <details> 折叠框美化 */
.md-typeset details {
  border-radius: 0.45rem;
  margin: 1em 0;
}

/* 图表清晰渲染：深色模式下给白底/透明底教学 PNG 提供柔和护眼衬底 */
.md-typeset img {
  border-radius: 0.45rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  max-width: 100%;
  height: auto;
}

[data-md-color-scheme="slate"] .md-typeset img {
  background-color: #f8f9fa;
  padding: 0.35rem;
}

/* 数学公式与 Mermaid 图防撑破屏幕：超宽时独立横向平滑滚动 */
.md-typeset div.arithmatex {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.35rem 0;
  -webkit-overflow-scrolling: touch;
}

.md-typeset pre.mermaid {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  text-align: center;
}

.md-typeset__scrollwrap {
  -webkit-overflow-scrolling: touch;
}

/* 移动端（iPhone / iPad 竖屏）深度适配 */
@media screen and (max-width: 44.9375em) {
  html {
    -webkit-text-size-adjust: 100%;
  }
  .md-typeset {
    font-size: 0.88rem;
    line-height: 1.82;
  }
  .md-content__inner {
    padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
  }
  .quant-reading-card {
    padding: 0.85rem 1rem;
  }
  .quant-reading-card__actions,
  .quant-reading-card__actions .quant-btn {
    width: 100%;
  }
  .quant-resume-toast {
    left: 0.85rem;
    right: 0.85rem;
    bottom: calc(0.9rem + env(safe-area-inset-bottom, 0px));
    justify-content: space-between;
  }
}