:root {
  --md-primary-fg-color: #de5871cb;       /* 粉红（hotpink） */
  --md-accent-fg-color: #5a5a5a;        /* 优雅深灰 */
  --md-default-bg-color: #fff0f5;       /* 淡粉底色 (lavenderblush) */
}

/* 滚动条自定义 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: #3a2f2f;    /* 棕深灰轨道 */
}
::-webkit-scrollbar-thumb {
  background: #a8a8a8;    /* 浅灰滑块 */
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: #666;
}

/* 讓右側 TOC 的滾動更順暢 */
.md-sidebar--secondary .md-sidebar__scrollwrap { scroll-behavior: smooth; }

/* 輕量版面微調 */
.md-main__inner { margin-top: 0.8rem; }
.md-content { max-width: 60rem; }
.md-content__inner { margin: 0 auto; padding-top: 0.4rem; }
.md-grid { max-width: 92rem; }

.md-header {
  backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18), 0 4px 16px rgba(80, 40, 55, 0.1);
}

.md-search__form { border-radius: 12px; }
.md-sidebar__scrollwrap { padding-top: 0.1rem; }

@media screen and (min-width: 76.25em) {
  .md-sidebar--primary,
  .md-sidebar--secondary {
    position: sticky;
    top: 3.2rem;
    align-self: start;
    height: calc(100vh - 3.8rem);
  }

  .md-sidebar--primary .md-sidebar__scrollwrap,
  .md-sidebar--secondary .md-sidebar__scrollwrap {
    max-height: calc(100vh - 4.4rem);
    overflow-y: auto;
  }

  .md-sidebar--primary {
    width: 15.5rem;
  }

  .md-sidebar--secondary {
    width: 18rem;
    margin-left: 1rem;
  }
}

.md-sidebar--primary .md-sidebar__inner,
.md-sidebar--secondary .md-sidebar__inner {
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.md-sidebar--primary .md-nav,
.md-sidebar--secondary .md-nav {
  padding: 0;
}

.md-nav--primary .md-nav__title { display: block; }

.md-nav--primary .md-nav__item { margin: 0; }

.md-nav--primary .md-nav__link {
  margin: 0;
  padding: 0.28rem 0;
  border-radius: 0;
  transition: color 120ms ease;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  line-height: 1.45;
}

.md-nav--primary .md-nav__link:hover { background: transparent; }

.md-nav--primary .md-nav__link--active,
.md-nav--primary .md-nav__item .md-nav__link--active {
  font-weight: 700;
}

.md-nav--primary .md-nav__item--section > .md-nav__link {
  font-size: inherit;
  opacity: 1;
}

/* 課程區塊下的每週頁面固定展開，避免只顯示 active 項目 */
.md-nav--primary > .md-nav__list > .md-nav__item--section > .md-nav {
  display: block !important;
}

.md-nav--primary > .md-nav__list > .md-nav__item--section > .md-nav > .md-nav__list {
  display: block !important;
}

.md-nav--primary .md-nav__item--section > .md-nav__toggle ~ .md-nav,
.md-nav--primary .md-nav__item--section > input[type="checkbox"] ~ .md-nav {
  display: block !important;
}

/* 右側 TOC 精緻化 */
.md-sidebar--secondary {
  border-left: 1px solid rgba(110, 85, 96, 0.12);
  padding-left: 1rem;
}

.md-nav--secondary .md-nav__title {
  padding: 0.25rem 0 0.45rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: #6e5560;
  letter-spacing: 0.02em;
}

.md-nav--secondary .md-nav__link {
  margin: 0;
  padding: 0.32rem 0.2rem 0.32rem 0.8rem;
  border-left: 2px solid transparent;
  border-radius: 0 0.4rem 0.4rem 0;
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.45;
  color: rgba(0, 0, 0, 0.72);
}

.md-nav--secondary .md-nav__list {
  gap: 0.05rem;
}

.md-nav--secondary .md-nav__item {
  margin: 0;
}

.md-nav--secondary .md-nav__item .md-nav {
  margin-top: 0.08rem;
}

.md-nav--secondary .md-nav__item .md-nav__link {
  font-size: 0.84rem;
}

.md-nav--secondary .md-nav__item .md-nav .md-nav__link {
  padding-left: 1.15rem;
}

.md-nav--secondary .md-nav__item .md-nav .md-nav .md-nav__link {
  padding-left: 1.55rem;
  font-size: 0.8rem;
  color: rgba(0, 0, 0, 0.62);
}

.md-nav--secondary .md-nav__link:hover,
.md-nav--secondary .md-nav__link--active {
  border-left-color: rgba(222, 88, 113, 0.7);
  background: rgba(222, 88, 113, 0.08);
}

.md-nav--secondary .md-nav__link--active {
  font-weight: 700;
  color: #6f2f3d;
}

.md-nav--secondary .md-nav__item--active > .md-nav__link {
  color: #6f2f3d;
}

.md-typeset {
  font-size: 0.9rem;
  line-height: 1.75;
}

.md-typeset h1 {
  margin-bottom: 1rem;
  font-size: 1.9rem;
  line-height: 1.2;
}

.md-typeset h2 {
  margin-top: 2.2rem;
  padding-top: 0.2rem;
  font-size: 1.2rem;
}

.md-typeset h3 {
  margin-top: 1.5rem;
  font-size: 1rem;
}

.md-typeset p,
.md-typeset ul,
.md-typeset ol {
  margin-top: 0.75em;
  margin-bottom: 0.75em;
}

.md-typeset hr {
  margin: 1.6rem 0;
  border-bottom-color: rgba(90, 90, 90, 0.12);
}

/* 強制所有標題層級加粗 */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  font-weight: 700 !important; /* 700 = 粗體 */
  scroll-margin-top: 5rem;
}

@media screen and (max-width: 76.1875em) {
  .md-sidebar--primary .md-sidebar__inner,
  .md-sidebar--secondary .md-sidebar__inner {
    background: transparent;
    border: 0;
  }

  .md-sidebar--primary .md-nav,
  .md-sidebar--secondary .md-nav {
    padding: 0.15rem 0 0.5rem;
  }

  .md-nav--primary .md-nav__link {
    padding: 0.32rem 0;
    border-radius: 0;
  }

  .md-sidebar--secondary {
    border-left: 0;
    padding-left: 0;
  }

}