/* ============================================================
   自定义样式 - 磊哥的学习笔记
   ============================================================ */

/* Hero 区域 */
.hero {
  text-align: center;
  padding: 2rem 1rem 1rem;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  background: linear-gradient(135deg, var(--md-primary-fg-color), var(--md-accent-fg-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.hero__subtitle {
  font-size: 0.95rem;
  color: var(--md-typeset-color);
  opacity: 0.7;
  margin: 0;
}

/* ============================================================
   书签夹式导航
   ============================================================ */

/* 分类卡片 */
.nav-section {
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-typeset-table-color);
  border-radius: .5rem;
  margin-bottom: 1.1rem;
  padding: .5rem .9rem .9rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
  transition: box-shadow .2s;
}
.nav-section:hover {
  box-shadow: 0 2px 10px rgba(0,0,0,.08);
}

/* 分类标题 */
.nav-section__title {
  font-size: 1rem;
  font-weight: 600;
  margin: .3rem 0 .7rem;
  padding-left: .6rem;
  border-left: 4px solid var(--nav-accent, var(--md-primary-fg-color));
  color: var(--nav-accent, var(--md-primary-fg-color));
  line-height: 1.2;
}
.nav-section__title .nav-section__icon {
  margin-right: .3rem;
}

/* 链接网格 */
.nav-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .15rem .8rem;
}

/* 单个链接 */
.nav-links a {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .35rem .5rem;
  border-radius: .25rem;
  font-size: .82rem;
  line-height: 1.4;
  color: var(--md-typeset-color);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  transition: background .2s, color .2s;
}
.nav-links a:hover {
  background: var(--md-code-bg-color);
  color: var(--md-primary-fg-color);
}
.nav-links a img {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border-radius: 4px;
  object-fit: contain;
  /* 中性底衬：避免纯白/纯黑图标在浅色或深色背景上"消失" */
  background: rgba(128, 128, 128, .38);
  box-shadow: inset 0 0 0 1px rgba(128, 128, 128, .2);
}

/* 响应式 */
@media screen and (max-width: 76.1875em) {
  .nav-links { grid-template-columns: repeat(3, 1fr); }
}
@media screen and (max-width: 59.9375em) {
  .nav-links { grid-template-columns: repeat(2, 1fr); }
}
@media screen and (max-width: 30em) {
  .nav-links { grid-template-columns: repeat(2, 1fr); }
  .nav-section { padding: .4rem .6rem .7rem; }
}

/* ============================================================
   通用
   ============================================================ */

/* 代码块内边距微调 */
.md-typeset pre > code {
  padding: 0.85em 1em;
}

/* 侧边栏导航项稍微紧凑 */
.md-nav__link {
  font-size: 0.93rem;
}

/* 标题锚点悬停显示 */
.md-typeset .headerlink {
  opacity: 0;
  transition: opacity .2s;
}
.md-typeset h1:hover .headerlink,
.md-typeset h2:hover .headerlink,
.md-typeset h3:hover .headerlink,
.md-typeset h4:hover .headerlink {
  opacity: 0.7;
}

/* 暗色模式 Hero 调整 */
[data-md-color-scheme="slate"] .hero h1 {
  background: linear-gradient(135deg, #7986cb, #8c9eff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
[data-md-color-scheme="slate"] .hero p.hero__subtitle {
  color: rgba(255,255,255,0.65);
}

/* 首页隐藏侧边栏时的内容宽度 */
.md-content--hidden {
  max-width: 70rem !important;
}