/* Project2 教程自定义样式 */

/* ===== 学习目标卡片 ===== */
.learning-goals {
  background: linear-gradient(135deg, var(--md-primary-faint-color, rgba(14,165,233,0.06)), rgba(6,182,212,0.04));
  border: 1px solid var(--md-default-fg-color--lightest, #e2e8f0);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.learning-goals h3 {
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===== 章节卡片网格 (MkDocs Material grid cards) ===== */
/* Material 的 <div class="grid" markdown> 会生成 <ul> > <li> 结构 */
.grid.chapter-cards {
  margin: 1.25rem 0;
}

.grid.chapter-cards > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.grid.chapter-cards > ul > li {
  background: var(--md-default-bg-color, #fff);
  border: 1px solid var(--md-default-fg-color--lightest, #e2e8f0);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  margin: 0;
}

.grid.chapter-cards > ul > li::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--md-primary-color, #0ea5e9), var(--md-accent-color, #06b6d4));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.grid.chapter-cards > ul > li:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14,165,233,0.10);
  border-color: var(--md-primary-color, #0ea5e9);
}

.grid.chapter-cards > ul > li:hover::before {
  opacity: 1;
}

/* 卡片内段落和链接样式 */
.grid.chapter-cards > ul > li p {
  margin: 0;
}

.grid.chapter-cards > ul > li p:first-of-type {
  font-weight: 600;
  font-size: 0.95rem;
}

.grid.chapter-cards > ul > li p:first-of-type a {
  color: var(--md-default-fg-color, #1e293b) !important;
}

.grid.chapter-cards > ul > li p:last-of-type {
  font-size: 0.82rem;
  color: var(--md-default-fg-color--light, #64748b);
  line-height: 1.5;
  margin-top: 0.25rem;
}

/* 卡片内的行内代码标签 (如 `5分钟`) */
.grid.chapter-cards code {
  font-size: 0.75rem;
  background: rgba(14,165,233,0.08);
  color: var(--md-primary-color, #0ea5e9);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

/* ===== 教程亮点列表 ===== */
.tutorial-benefits {
  background: linear-gradient(135deg, var(--md-primary-faint-color, rgba(14,165,233,0.06)), rgba(6,182,212,0.04));
  border: 1px solid var(--md-default-fg-color--lightest, #e2e8f0);
  border-radius: 10px;
  padding: 1rem 1.5rem;
  margin: 1rem 0;
}

.tutorial-benefits ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.tutorial-benefits li {
  padding: 0.3rem 0;
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.tutorial-benefits li::before {
  content: '✓';
  color: #10b981;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== 阶段进度条 ===== */
.phase-track {
  display: flex;
  gap: 0;
  margin: 1.5rem 0;
  overflow-x: auto;
  padding: 0.5rem 0;
}

.phase-step {
  flex: 1;
  min-width: 110px;
  text-align: center;
  padding: 0.5rem 0.5rem;
  position: relative;
  font-size: 0.85rem;
}

.phase-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 22px;
  right: -6px;
  width: 12px;
  height: 2px;
  background: var(--md-default-fg-color--lightest, #e2e8f0);
  z-index: 0;
}

.phase-step .phase-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--md-primary-color, #0ea5e9), var(--md-accent-color, #06b6d4));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  box-shadow: 0 2px 8px rgba(14,165,233,0.25);
  position: relative;
  z-index: 1;
}

.phase-step .phase-label {
  font-weight: 600;
  display: block;
  font-size: 0.82rem;
  color: var(--md-default-fg-color, #1e293b);
}

.phase-step .phase-time {
  font-size: 0.7rem;
  color: var(--md-default-fg-color--light, #64748b);
  margin-top: 0.1rem;
}

/* ===== 状态徽章 ===== */
.status-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-red { background: rgba(239,68,68,0.1); color: #ef4444; }
.status-yellow { background: rgba(245,158,11,0.1); color: #f59e0b; }
.status-green { background: rgba(16,185,129,0.1); color: #10b981; }
.status-blue { background: rgba(14,165,233,0.1); color: var(--md-primary-color, #0ea5e9); }

/* ===== 层级架构图 ===== */
.arch-layer {
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 0.75rem;
  border: 2px solid;
}

.arch-layer-firmware {
  background: linear-gradient(135deg, rgba(239,68,68,0.06), rgba(239,68,68,0.03));
  border-color: rgba(239,68,68,0.2);
}

.arch-layer-python {
  background: linear-gradient(135deg, rgba(14,165,233,0.06), rgba(14,165,233,0.03));
  border-color: rgba(14,165,233,0.2);
}

.arch-layer-vision {
  background: linear-gradient(135deg, rgba(16,185,129,0.06), rgba(16,185,129,0.03));
  border-color: rgba(16,185,129,0.2);
}

.arch-layer-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.arch-layer-firmware .arch-layer-title { color: #ef4444; }
.arch-layer-python .arch-layer-title { color: var(--md-primary-color, #0ea5e9); }
.arch-layer-vision .arch-layer-title { color: #10b981; }

.arch-layer-desc {
  font-size: 0.9rem;
  color: var(--md-default-fg-color--light, #64748b);
  margin-bottom: 0.75rem;
}

.arch-modules {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.arch-module {
  background: rgba(255,255,255,0.7);
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(0,0,0,0.06);
}

/* ===== API 文档式模块页 ===== */
.api-class-card {
  background: var(--md-default-bg-color, #fff);
  border: 1px solid var(--md-default-fg-color--lightest, #e2e8f0);
  border-left: 4px solid var(--md-primary-color, #0ea5e9);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.api-class-card .api-class-name {
  font-family: var(--md-code-font-family, monospace);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--md-primary-color, #0ea5e9);
}

.api-class-card .api-class-desc {
  font-size: 0.88rem;
  color: var(--md-default-fg-color--light, #64748b);
  margin-top: 0.25rem;
}

/* 方法签名块 */
.api-method {
  border-left: 3px solid var(--md-accent-color, #06b6d4);
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 1.25rem 0 0.5rem;
}

.api-method .api-method-sig {
  font-family: var(--md-code-font-family, monospace);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--md-default-fg-color, #1e293b);
}

.api-method .api-method-sig .param-name {
  color: var(--md-accent-color, #06b6d4);
}

.api-method .api-method-sig .type-hint {
  color: var(--md-default-fg-color--light, #64748b);
  font-style: italic;
}

.api-method .api-method-desc {
  font-size: 0.82rem;
  color: var(--md-default-fg-color--light, #64748b);
  margin-top: 0.15rem;
}

/* 返回值标签 */
.api-returns {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  background: rgba(16,185,129,0.1);
  color: #10b981;
  margin-right: 0.35rem;
}

/* 方法组标题 */
.api-section-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--md-default-fg-color--light, #64748b);
  border-bottom: 1px solid var(--md-default-fg-color--lightest, #e2e8f0);
  padding-bottom: 0.35rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .grid.chapter-cards > ul { grid-template-columns: 1fr; }
  .phase-track { flex-direction: column; }
  .phase-step:not(:last-child)::after { display: none; }
  .api-method { padding-left: 0.6rem; }
}

/* ===== 侧边栏导航层级样式 ===== */

/* 页面 H1 标题恢复默认 */
.md-typeset h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* 左侧目录栏站点标题 */
.md-nav--primary .md-nav__title {
  font-size: 1.05rem;
  font-weight: 700;
}

/* 顶级节标题（项目概览、安全须知…）— 加粗加大 + 字母间距 */
.md-nav--primary > .md-nav__list > .md-nav__item--nested > .md-nav__link {
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.6rem;
}

/* 顶级直接页面链接（首页、版本选择指南、故障排查速查、参考资料索引）— 中等粗细 */
.md-nav--primary > .md-nav__list > .md-nav__item:not(.md-nav__item--nested) > .md-nav__link {
  font-weight: 600;
  font-size: 0.82rem;
  margin-top: 0.6rem;
}

/* 二级页面链接 — 较小较细，与顶级形成对比 + 缩进 */
.md-nav--primary .md-nav__item--nested > .md-nav {
  margin-left: 0.5rem;
  padding-left: 0.6rem;
  border-left: 1.5px solid var(--md-default-fg-color--lightest, #e2e8f0);
}

.md-nav--primary .md-nav__item--nested > .md-nav .md-nav__list > .md-nav__item > .md-nav__link {
  font-weight: 400;
  font-size: 0.76rem;
}

/* 二级嵌套节标题（如有）— 中等粗细 */
.md-nav--primary .md-nav__item--nested > .md-nav .md-nav__list > .md-nav__item--nested > .md-nav__link {
  font-weight: 600;
  font-size: 0.76rem;
  text-transform: none;
  letter-spacing: 0;
  margin-top: 0.3rem;
}

/* 三级页面链接 — 最小字号 */
.md-nav--primary .md-nav__item--nested > .md-nav .md-nav__item--nested > .md-nav .md-nav__list > .md-nav__item > .md-nav__link {
  font-weight: 400;
  font-size: 0.72rem;
}

/* 部署指南节标题也需要大写间距 */
[data-md-level="1"].md-nav__item--nested > .md-nav__link {
  text-transform: uppercase;
  letter-spacing: 0.04em;
}