/* 全局字体栈 — 与 Hub 统一使用系统字体 */
:root {
  --md-text-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  --md-code-font: "SF Mono", Monaco, Inconsolata, "Roboto Mono", "Source Code Pro",
    "Courier New", monospace;
}

body, .md-typeset {
  font-family: var(--md-text-font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 正文 */
.md-typeset {
  font-size: 0.875rem;
  line-height: 1.7;
  letter-spacing: -0.01em;
}

/* ===== 左侧导航栏 ===== */
.md-nav {
  font-size: 0.8125rem;
  line-height: 1.5;
}

.md-nav__link {
  font-weight: 500;
  padding: 0.4rem 0.65rem;
  margin: 1px 0;
}

.md-nav__link--active {
  font-weight: 600;
}

.md-nav__item--nested > .md-nav__link {
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
}

.md-sidebar--primary .md-nav--primary > .md-nav__list > .md-nav__item > .md-nav__link,
.md-sidebar--primary .md-nav--primary > .md-nav__list > .md-nav__item > label {
  font-size: 0.98rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0.01em;
  color: var(--md-default-fg-color--lighter);
  margin-top: 0.9rem;
  padding-left: 0.2rem;
  padding-right: 0.2rem;
}

/* ===== Tab 栏 ===== */
.md-tabs__link {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* ===== 标题 ===== */
.md-typeset h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.md-typeset h2 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.md-typeset h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.md-typeset h4, .md-typeset h5, .md-typeset h6 {
  font-size: 0.95rem;
  font-weight: 600;
}

/* ===== 右侧目录 ===== */
.md-sidebar--secondary .md-nav {
  font-size: 0.75rem;
}

.md-sidebar--secondary .md-nav__link {
  font-weight: 400;
  padding: 0.3rem 0.5rem;
}

.md-sidebar--secondary .md-nav__link--active {
  font-weight: 600;
}

/* ===== 代码字体 ===== */
.md-typeset code,
.md-typeset pre code {
  font-family: var(--md-code-font);
  font-size: 0.8125rem;
}