/* ============ anime 主题样式：二次元风格 + 亮暗双主题 ============ */

/* ---------- 主题变量 ---------- */
:root,
html[data-theme='light'] {
  --bg: #fdf6fa;
  --bg-alt: #ffffff;
  --text: #3d3a4e;
  --text-soft: #8a86a3;
  --primary: #ff7eb3;
  --primary-soft: #ffe3ef;
  --accent: #7ec8ff;
  --border: #f0e4ee;
  --shadow: 0 8px 28px rgba(255, 126, 179, 0.14);
  --header-bg: rgba(255, 255, 255, 0.82);
  --card-bg: #ffffff;
  --code-bg: #f6f0f6;
  --panel-bg: rgba(255, 255, 255, 0.68);
}

html[data-theme='dark'] {
  --bg: #17162a;
  --bg-alt: #1f1d38;
  --text: #e4e1f5;
  --text-soft: #9c97c0;
  --primary: #ff8fb9;
  --primary-soft: #3a2340;
  --accent: #7ec8ff;
  --border: #2e2b4e;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(23, 22, 42, 0.82);
  --card-bg: #201e3c;
  --code-bg: #2a2748;
  --panel-bg: rgba(26, 24, 48, 0.68);
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }

/* 底色由 html 承担（防跨页白闪）；body 必须透明，
   否则 body 背景会盖住 z-index:-1 的 #site-bg 壁纸层 */
html { scroll-behavior: smooth; background: var(--bg); transition: background 0.35s; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: transparent;
  color: var(--text);
  line-height: 1.75;
  transition: color 0.35s;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
body.modal-open { overflow: hidden; }

.container { max-width: 980px; margin: 0 auto; padding: 0 20px; }
.site-main { min-height: 70vh; padding-bottom: 56px; }
body:not(.is-home) .site-main { padding-top: 96px; }

/* 文章正文展示页磨砂衬底：壁纸上叠半透明毛玻璃面板，兼顾氛围与可读性 */
.site-main > .post-detail {
  background: var(--panel-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 30px 32px 40px;
  margin: 28px auto;
}

/* ---------- 全站背景壁纸层 ---------- */
/* 固定于视口最底层；具体图片由 layout.ejs 按主题配置 background 注入 */
#site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-size: cover;
  background-position: center;
  pointer-events: none;
  /* 壁纸图片解码完成前隐藏，避免纯色→壁纸的突变闪烁；
     JS 加载完成后立即淡入（.bg-ready）；若 JS 未执行/缓存不一致，
     0.6s 后由 CSS 动画自动淡入兑底，保证壁纸功能永不失效 */
  opacity: 0;
  transition: opacity 0.5s ease;
  animation: bg-fade 0.5s ease 0.6s forwards;
}
#site-bg.bg-ready { opacity: 1; animation: none; }
/* 本会话内壁纸已缓存（首屏脚本标记）：首帧直接显示，跳过淡入，消除跨页壁纸空窗闪白 */
html.bg-cached #site-bg { opacity: 1; animation: none; transition: none; }
@keyframes bg-fade { to { opacity: 1; } }
/* 遮罩：用主题底色压淡壁纸，浓度由配置 veil 控制，保证正文可读 */
#site-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bg);
  transition: background 0.35s;
}
/* 首页 hero 自带全屏壁纸盖在上层，滚动过 hero 后全站背景自然露出 */

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  height: 64px;
  backdrop-filter: blur(12px);
  background: transparent;
  transition: background 0.3s, box-shadow 0.3s;
}
.site-header.scrolled,
body:not(.is-home) .site-header {
  background: var(--header-bg);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}
body.is-home .site-header:not(.scrolled) { color: #fff; }

.brand { font-size: 20px; font-weight: 700; letter-spacing: 1px; }
.brand-mark { color: var(--primary); margin-right: 6px; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 6px 13px;
  border-radius: 20px;
  font-size: 15px;
  transition: background 0.25s, color 0.25s;
}
.nav-link:hover { background: var(--primary-soft); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  margin-left: 4px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background 0.25s, transform 0.25s;
}
.icon-btn:hover { background: var(--primary-soft); color: var(--primary); transform: rotate(12deg); }

html[data-theme='light'] .icon-moon { display: none; }
html[data-theme='dark'] .icon-sun { display: none; }

.nav-toggle, .nav-toggle-btn { display: none; }

/* ---------- 首页 hero ---------- */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  animation: hero-zoom 24s ease-in-out infinite alternate;
}
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
@keyframes hero-zoom {
  from { transform: scale(1); }
  to { transform: scale(1.08); }
}
.hero-veil {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.18) 0%, rgba(0,0,0,0.05) 50%, rgba(0,0,0,0.32) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.2s ease-out;
}
.hero-title { font-size: 56px; letter-spacing: 6px; margin-bottom: 10px; }
.hero-subtitle { font-size: 17px; opacity: 0.9; margin-bottom: 26px; }
.hero-quote {
  font-size: 19px;
  min-height: 34px;
  opacity: 0.95;
  transition: opacity 0.4s;
}
.hero-quote.fade-out { opacity: 0; }

.scroll-down {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  border: none;
  background: transparent;
  color: #fff;
  cursor: pointer;
  animation: bounce 1.8s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 10px); }
}

/* ---------- 文章卡片列表 ---------- */
.post-list { padding-top: 56px; }
.section-title {
  font-size: 26px;
  margin-bottom: 26px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.cards { display: flex; flex-direction: column; gap: 18px; }

.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  transition: transform 0.28s, box-shadow 0.28s;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.post-card-link { display: flex; }
.post-card-cover { flex: 0 0 220px; max-height: 150px; overflow: hidden; }
.post-card-cover img { width: 100%; height: 100%; object-fit: cover; }
.post-card-body { padding: 20px 24px; flex: 1; }
.post-card-title { font-size: 19px; margin-bottom: 8px; transition: color 0.25s; }
.post-card:hover .post-card-title { color: var(--primary); }
.post-card-excerpt { font-size: 14px; color: var(--text-soft); margin-bottom: 12px; }
.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-soft);
}
.tag-chip {
  display: inline-block;
  padding: 1px 9px;
  margin: 0 3px 3px 0;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12.5px;
  font-style: normal;
  transition: background 0.25s, color 0.25s;
}
a.tag-chip:hover { background: var(--primary); color: #fff; }
.tag-chip em { font-style: normal; opacity: 0.75; }

/* ---------- 分页 ---------- */
.paginator { margin-top: 36px; text-align: center; }
.paginator .page-number,
.paginator .extend,
.pager-btn {
  display: inline-block;
  min-width: 36px;
  padding: 6px 13px;
  margin: 0 4px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.25s;
}
.paginator .page-number:hover,
.paginator .extend:hover,
.pager-btn:not(:disabled):hover { border-color: var(--primary); color: var(--primary); }
.paginator .page-number.current,
.pager-btn.current { background: var(--primary); border-color: var(--primary); color: #fff; }
.paginator .space { margin: 0 4px; color: var(--text-soft); }
.pager-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.thoughts-pager { margin-top: 32px; text-align: center; }

/* ---------- 文章详情 ---------- */
.post-detail, .page-detail { max-width: 820px; }
.post-header { margin-bottom: 32px; text-align: center; }
.post-cat { margin-bottom: 12px; }
.cat-chip {
  display: inline-block;
  padding: 3px 14px;
  border-radius: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
}
.post-title { font-size: 34px; margin-bottom: 14px; }
.page-title { font-size: 30px; margin: 40px 0 28px; }
.page-title small { font-size: 15px; color: var(--text-soft); margin-left: 8px; }
.post-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-soft);
  font-size: 14px;
  margin-bottom: 12px;
}
.post-tags { margin-top: 4px; }

.markdown-body { font-size: 16px; }
.markdown-body h2 {
  margin: 36px 0 16px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
  font-size: 24px;
}
.markdown-body h3 { margin: 28px 0 12px; font-size: 20px; }
.markdown-body p { margin-bottom: 16px; }
.markdown-body ul, .markdown-body ol { margin: 0 0 16px 24px; }
.markdown-body blockquote {
  margin: 16px 0;
  padding: 10px 18px;
  border-left: 4px solid var(--accent);
  background: var(--primary-soft);
  border-radius: 0 10px 10px 0;
  color: var(--text-soft);
}
.markdown-body code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 14px;
}
.markdown-body pre {
  background: var(--code-bg);
  padding: 16px 18px;
  border-radius: 12px;
  overflow-x: auto;
  margin-bottom: 16px;
}
.markdown-body pre code { background: transparent; padding: 0; }
.markdown-body img { border-radius: 12px; }
.markdown-body a { color: var(--primary); border-bottom: 1px dashed var(--primary); }

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 44px 0;
  font-size: 14.5px;
}
.post-nav-item {
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card-bg);
  max-width: 46%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: all 0.25s;
}
.post-nav-item:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 评论 ---------- */
.comments { margin-top: 48px; }
.comments-placeholder {
  padding: 26px;
  border: 1px dashed var(--border);
  border-radius: 14px;
  color: var(--text-soft);
  font-size: 14px;
  text-align: center;
  background: var(--card-bg);
}
.comments-placeholder code { background: var(--code-bg); padding: 2px 6px; border-radius: 6px; }

/* ---------- 归档 ---------- */
.archive-layout { display: flex; gap: 32px; align-items: flex-start; }
.archive-main { flex: 1; min-width: 0; }
.archive-year {
  font-size: 24px;
  color: var(--primary);
  margin: 26px 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.archive-year::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.archive-list { list-style: none; }
.archive-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 7px 0 7px 14px;
  border-left: 2px solid var(--border);
  transition: border-color 0.25s;
}
.archive-item:hover { border-left-color: var(--primary); }
.archive-date { color: var(--text-soft); font-size: 13.5px; flex-shrink: 0; }
.archive-link { font-weight: 700; }
.archive-link:hover { color: var(--primary); }

.archive-side { width: 260px; flex-shrink: 0; position: sticky; top: 96px; }
.side-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 20px;
}
.side-title { font-size: 16px; margin-bottom: 12px; }
.side-list { list-style: none; }
.side-list li {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
  font-size: 14.5px;
}
.side-list a:hover { color: var(--primary); }
.side-count {
  background: var(--primary-soft);
  color: var(--primary);
  padding: 0 9px;
  border-radius: 10px;
  font-size: 12.5px;
}
.side-tags { display: flex; flex-wrap: wrap; }

/* ---------- 个人随想（瀑布流） ---------- */
.thoughts-waterfall { column-count: 2; column-gap: 18px; }
.thought-card {
  break-inside: avoid;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 18px;
  transition: transform 0.28s, box-shadow 0.28s;
}
.thought-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.thought-content { font-size: 15px; margin-bottom: 12px; }
.thought-images { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.thought-images img { border-radius: 10px; max-height: 180px; object-fit: cover; }
.thought-date { font-size: 12.5px; color: var(--text-soft); }

/* ---------- 搜索弹层 ---------- */
.search-modal { position: fixed; inset: 0; z-index: 200; }
.search-mask {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}
.search-panel {
  position: relative;
  max-width: 620px;
  margin: 12vh auto 0;
  background: var(--bg-alt);
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  animation: pop-in 0.25s ease;
}
@keyframes pop-in {
  from { opacity: 0; transform: translateY(-14px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
.search-input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-soft);
}
#search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 16px;
}
.search-close {
  border: none;
  background: transparent;
  color: var(--text-soft);
  font-size: 16px;
  cursor: pointer;
}
.search-results {
  list-style: none;
  max-height: 46vh;
  overflow-y: auto;
  padding: 8px;
}
.search-hint { padding: 22px; text-align: center; color: var(--text-soft); font-size: 14px; }
.search-item a {
  display: block;
  padding: 11px 14px;
  border-radius: 12px;
  transition: background 0.2s;
}
.search-item a:hover { background: var(--primary-soft); }
.search-item-title { display: block; font-size: 15.5px; }
.search-item-meta { display: block; font-size: 12.5px; color: var(--text-soft); margin-top: 2px; }

/* ---------- 点击星星粒子 ---------- */
.click-star {
  position: absolute;
  z-index: 999;
  pointer-events: none;
  font-size: 14px;
  animation: star-fly 0.8s ease-out forwards;
}
@keyframes star-fly {
  from { opacity: 1; transform: translate(0, 0) scale(1); }
  to { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(0.3) rotate(120deg); }
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 28px 20px;
  text-align: center;
  color: var(--text-soft);
  font-size: 13.5px;
  border-top: 1px solid var(--border);
}

/* ---------- 视觉动效：页面过渡 / 滚动渐显 / 入场 ---------- */
@media (prefers-reduced-motion: no-preference) {
  /* 跨文档 View Transitions：站内跳转由浏览器新旧页面快照交叉淡化，无空白帧（Chrome/Edge 126+） */
  @view-transition { navigation: auto; }

  /* 以下手动渐变仅用于不支持跨文档 VT 的浏览器（html.vt 由首屏脚本标记） */
  /* 进入页面：内容区渐显（背景壁纸层不参与，保持稳定） */
  html:not(.vt) .site-main,
  html:not(.vt) .site-footer { animation: page-in 0.7s ease backwards; }

  /* 站内跳转离开：仅淡出内容，顶栏与背景壁纸保持可见（JS 添加类） */
  html:not(.vt) body.page-leaving .site-main,
  html:not(.vt) body.page-leaving .site-footer { opacity: 0; transition: opacity 0.22s ease; }

  /* hero 文案分层入场 */
  .hero-title { animation: rise-in 0.7s ease 0.05s backwards; }
  .hero-subtitle { animation: rise-in 0.7s ease 0.2s backwards; }
  .hero-quote { animation: rise-in 0.7s ease 0.35s backwards; }
  .scroll-down { animation: bounce 1.8s infinite, fade-in 0.6s ease 0.6s backwards; }

  /* 滚动渐显（JS 添加 reveal/revealed 类，动画结束后移除以恢复 hover 过渡） */
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
  }
  .reveal.revealed { opacity: 1; transform: none; }
}

@keyframes page-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes rise-in {
  from { opacity: 0; transform: translateY(26px); }
  to { opacity: 1; transform: none; }
}
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 主题切换与跨页跳转：View Transitions 交叉淡入时长（旧页快淡出，新页缓慢渐出） */
::view-transition-old(root) { animation-duration: 0.8s; }
::view-transition-new(root) { animation-duration: 1.0s; animation-timing-function: ease-out; }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .hero-title { font-size: 38px; letter-spacing: 3px; }
  .site-main > .post-detail { padding: 22px 16px 30px; margin: 16px 10px; border-radius: 16px; }
  .archive-layout { flex-direction: column; }
  .archive-side { width: 100%; position: static; }
  .thoughts-waterfall { column-count: 1; }
  .post-card-link { flex-direction: column; }
  .post-card-cover { flex: none; max-height: 170px; }

  /* 移动端折叠导航 */
  .nav-toggle-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
  }
  .nav-toggle-btn span {
    width: 22px; height: 2px;
    background: currentColor;
    border-radius: 2px;
  }
  .site-nav {
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    padding: 10px 20px 16px;
    display: none;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
  }
  .site-nav .nav-link { padding: 10px 14px; }
  .nav-toggle:checked ~ .site-nav { display: flex; }
  body.is-home .site-header:not(.scrolled) .site-nav { color: var(--text); }
}