/* ============================================================
   layout.css — Navigation, Hero, Sections, Cards, Post & Footer
   ============================================================ */

/* ---------- 全站背景粒子 Canvas ---------- */
.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  display: block;
}

/* ---------- 导航栏 (Navigation Pill) ---------- */
.nav-wrapper {
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-4);
  pointer-events: none;
}

.nav {
  pointer-events: auto;
  width: 100%;
  max-width: 720px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px 6px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-nav);
  background: transparent;
  transition: background-color 0.3s ease,
              backdrop-filter 0.3s ease,
              -webkit-backdrop-filter 0.3s ease,
              border-color 0.3s ease,
              box-shadow 0.3s ease;
}

/* 滚动 >12px 激活毛玻璃 */
.nav.scrolled {
  background: rgba(227, 223, 217, 0.76);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-color: var(--border);
  box-shadow: var(--shadow-nav);
}

.dark .nav.scrolled {
  background: rgba(30, 26, 22, 0.78);
  border-color: var(--border);
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--foreground);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav__logo:hover {
  color: var(--primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: all var(--transition-fast);
}

.nav__link:hover {
  color: var(--foreground);
  background: var(--accent);
}

.nav__link.active {
  color: var(--primary-foreground);
  background: var(--primary);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  color: var(--muted-foreground);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.nav__icon-btn:hover {
  color: var(--foreground);
  background: var(--accent);
  border-color: var(--border);
}

.nav__icon-btn svg {
  width: 18px;
  height: 18px;
}

/* 移动端菜单按钮与折叠面板 */
.nav__menu-btn {
  display: none;
}

.nav__mobile-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  background: var(--popover);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-card-hover);
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.nav__mobile-menu.is-open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav__mobile-menu .nav__link {
  height: 40px;
  width: 100%;
  justify-content: flex-start;
  padding: 0 var(--space-4);
  font-size: 14px;
}

/* ---------- 首页 Hero 区域 (100vh) ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 120px var(--space-4) 60px;
}

.hero__content {
  max-width: 960px;
  margin: 0 auto;
  will-change: transform, opacity;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(48px, 9vw, 110px);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: var(--space-4) 0 var(--space-5);
  color: var(--foreground);
}

.hero__title em {
  font-style: italic;
  color: var(--primary);
  display: block;
}

.hero__subtitle {
  font-family: var(--font-sans);
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--muted-foreground);
  max-width: 620px;
  margin: 0 auto var(--space-8);
  font-weight: 400;
  line-height: 1.5;
}

.hero__cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--muted-foreground);
  transition: color var(--transition-fast);
}

.hero__scroll-indicator:hover {
  color: var(--primary);
}

.hero__scroll-indicator svg {
  width: 22px;
  height: 22px;
}

/* ---------- 通用 Section 布局 ---------- */
.section {
  padding: var(--space-20) 0;
  position: relative;
}

.section-header {
  margin-bottom: var(--space-10);
}

.section-header--center {
  text-align: center;
}

/* ---------- 关于我板块 (#about) ---------- */
.about-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-8);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-8);
  align-items: center;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.about-card:hover {
  border-color: var(--ring);
  box-shadow: var(--shadow-card-hover);
}

.about-card__avatar {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(241, 72, 30, 0.85) 0%, rgba(255, 132, 95, 0.35) 100%);
  border: 1px solid rgba(241, 72, 30, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-card__avatar-badge {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
  opacity: 0.95;
}

.about-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about-card__text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--foreground);
}

.about-card__hobbies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* ---------- 技术栈板块 (#stack) ---------- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.stack-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.stack-card:hover {
  transform: translateY(-4px);
  border-color: var(--ring);
  box-shadow: var(--shadow-card-hover);
}

.stack-card__title {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--foreground);
}

.stack-card__desc {
  font-size: 14px;
  color: var(--muted-foreground);
  line-height: 1.6;
}

.stack-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: var(--space-3);
}

/* ---------- 精选项目 (#projects) ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
  height: 100%;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--ring);
  box-shadow: var(--shadow-card-hover);
}

.project-card__thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) - 6px);
  background: linear-gradient(135deg, rgba(241, 72, 30, 0.22) 0%, rgba(255, 132, 95, 0.08) 100%);
  border: 1px solid var(--border);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-card__thumb-svg {
  width: 56px;
  height: 56px;
  color: var(--primary);
  opacity: 0.85;
}

.project-card__content {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-card__title {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 500;
  margin: var(--space-2) 0;
  color: var(--foreground);
}

.project-card__desc {
  font-size: 13.5px;
  color: var(--muted-foreground);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.project-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.project-card__action {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: transform var(--transition-fast);
}

.project-card:hover .project-card__action {
  transform: translateX(4px);
}

.projects-more-cta {
  display: flex;
  justify-content: center;
  margin-top: var(--space-10);
}

/* 更多开源项目网格与详尽卡片 */
.more-projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.more-project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.more-project-card:hover {
  transform: translateY(-4px);
  border-color: var(--ring);
  box-shadow: var(--shadow-card-hover);
}

.more-project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.more-project-card__title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--foreground);
  margin-top: 2px;
}

.more-project-card__subtitle {
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: var(--space-2);
}

.more-project-card__body {
  font-size: 13.5px;
  color: var(--muted-foreground);
  line-height: 1.7;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.more-project-card__field {
  background: rgba(0, 0, 0, 0.02);
  border-left: 2px solid var(--primary);
  padding: 8px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.dark .more-project-card__field {
  background: rgba(255, 255, 255, 0.02);
}

.more-project-card__field-title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--foreground);
  margin-bottom: 3px;
  display: block;
}

.more-project-card__footer {
  margin-top: auto;
  padding-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

@media (max-width: 820px) {
  .more-projects-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 精选文章列表 (#writing & blog.html) ---------- */
.writing-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.writing-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              background-color var(--transition-base),
              box-shadow var(--transition-base);
}

.writing-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 3px;
  background: var(--primary);
  border-radius: 0 2px 2px 0;
  opacity: 0;
  transform: scaleY(0.4);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.writing-item:hover {
  transform: translateX(6px);
  border-color: var(--ring);
  box-shadow: var(--shadow-card-hover);
}

.writing-item:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

.writing-item__date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-foreground);
  letter-spacing: 0.04em;
}

.writing-item__title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--foreground);
  letter-spacing: -0.01em;
}

/* 博客列表页筛选胶囊 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--muted-foreground);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--foreground);
  border-color: var(--ring);
}

.filter-btn.active {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

/* ---------- 项目详情页排版 (projects/*.html) ---------- */
.project-detail {
  padding: 120px 0 var(--space-20);
}

.project-detail__header {
  margin-bottom: var(--space-8);
}

.project-detail__title {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 500;
  margin: var(--space-3) 0 var(--space-4);
  letter-spacing: -0.03em;
}

.project-detail__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-6);
}

.project-detail__hero-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(241, 72, 30, 0.28) 0%, rgba(255, 132, 95, 0.12) 100%);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-10);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card-hover);
}

.project-detail__section {
  margin-bottom: var(--space-10);
}

.project-detail__section-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.project-detail__p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--foreground);
  margin-bottom: var(--space-4);
}

.project-detail__actions {
  display: flex;
  gap: var(--space-4);
  margin: var(--space-8) 0;
  flex-wrap: wrap;
}

/* 项目详情底部分页卡片导航 (Prev / Next) */
.project-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

.pagination-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.pagination-card:hover {
  transform: translateY(-3px);
  border-color: var(--ring);
  box-shadow: var(--shadow-card-hover);
}

.pagination-card__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--foreground);
}

/* ---------- 文章详情页排版 (posts/*.html) ---------- */
.post-detail {
  padding: 120px 0 var(--space-20);
}

.post-detail__header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}

.post-detail__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.post-detail__title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-3);
}

.post-detail__subtitle {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted-foreground);
}

/* 文章正文长文排版（16-17px、行高 1.8） */
.post-content {
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--foreground);
}

.post-content p {
  margin-bottom: var(--space-5);
}

.post-content h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 500;
  margin: var(--space-10) 0 var(--space-4);
  letter-spacing: -0.02em;
}

.post-content h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  margin: var(--space-6) 0 var(--space-3);
}

.post-content ul, .post-content ol {
  margin: 0 0 var(--space-5) var(--space-5);
}

.post-content li {
  margin-bottom: var(--space-2);
  list-style: square;
}

.post-content blockquote {
  border-left: 3px solid var(--primary);
  padding: var(--space-3) var(--space-5);
  margin: var(--space-6) 0;
  background: var(--muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--foreground);
}

/* 正文里的插图（笔记里用 ![说明](/img/文件名) 插入） */
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin: var(--space-6) auto;
}

.post-diagram-box {
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  text-align: center;
}

/* ---------- 页脚 (Footer) ---------- */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: transparent;
  padding: var(--space-16) 0 var(--space-8);
  position: relative;
  z-index: 2;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-8);
}

.footer__serif-msg {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 500;
  color: var(--foreground);
  max-width: 600px;
  line-height: 1.35;
}

.footer__socials {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.footer__copy {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-foreground);
  letter-spacing: 0.06em;
  margin-top: var(--space-4);
}

/* ---------- 响应式断点 (Media Queries) ---------- */
@media (max-width: 900px) {
  .stack-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .about-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-card__avatar {
    width: 140px;
    margin: 0 auto;
  }

  .about-card__hobbies {
    justify-content: center;
  }
}

@media (max-width: 680px) {
  .nav__links {
    display: none;
  }

  .nav__menu-btn {
    display: inline-flex;
  }

  /* 触控尺寸：图标按钮与滚动指示器加大点击区域 */
  .nav__icon-btn {
    width: 40px;
    height: 40px;
  }

  .hero__scroll-indicator {
    padding: 10px;
  }

  .writing-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  /* 标签徽章不再被拉伸成整行宽条 */
  .writing-item .tag-badge {
    justify-self: start;
  }

  /* 卡片底部操作链接允许换行到下一行（文字不断行由基础样式统一控制） */
  .project-card__footer {
    flex-wrap: wrap;
  }

  /* 筛选胶囊加大触控高度 */
  .filter-btn {
    padding: 10px 16px;
  }

  /* 上一篇 / 下一篇在窄屏统一左对齐（覆盖行内右对齐） */
  .project-pagination .pagination-card {
    text-align: left !important;
  }

  .project-pagination {
    grid-template-columns: 1fr;
  }

  /* 页脚版权行断行更均衡，避免最后一行只剩一个词 */
  .footer__copy {
    text-wrap: balance;
  }

  /* 代码块横向滚动在触屏上更顺滑 */
  .code-block pre {
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
}