/* =====================================================================
   litesite 前台样式（补充 Tailwind 的少量自定义部分）
   ---------------------------------------------------------------------
   原则：
   1. 能用 Tailwind 工具类表达的，绝不写进这里
   2. 这里只放：氛围层（颗粒/光晕）、统一的按钮与表单控件、骨架屏、
      滚动进场、Markdown 排版、阅读层
   3. 不引入任何动画库，全部用 CSS transition + IntersectionObserver
   ===================================================================== */

/* ---------------------------------------------------------------
   1. 氛围层：纸张颗粒 + 柔和渐变光晕
   --------------------------------------------------------------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}
html.dark .grain { opacity: 0.05; }

/* 两团低饱和光斑，只用 accent 一个色系的变体，避免彩色噪声 */
.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(46% 38% at 12% 4%, rgb(var(--c-accent) / 0.13), transparent 62%),
    radial-gradient(40% 34% at 92% 22%, rgb(var(--c-accent2) / 0.10), transparent 66%),
    radial-gradient(50% 40% at 50% 108%, rgb(var(--c-accent) / 0.07), transparent 70%);
}
html.dark .aurora {
  background-image:
    radial-gradient(46% 38% at 12% 4%, rgb(var(--c-accent) / 0.16), transparent 62%),
    radial-gradient(40% 34% at 92% 22%, rgb(var(--c-accent2) / 0.10), transparent 66%),
    radial-gradient(50% 40% at 50% 108%, rgb(var(--c-accent) / 0.08), transparent 70%);
}

/* ---------------------------------------------------------------
   2. 导航与页脚
   --------------------------------------------------------------- */
.nav-link {
  position: relative;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 14px;
  color: rgb(var(--c-muted));
  transition: color 0.22s ease, background-color 0.22s ease;
}
.nav-link:hover {
  color: rgb(var(--c-fg));
  background-color: rgb(var(--c-fg) / 0.06);
}
.drawer-link {
  display: block;
  padding: 0.7rem 0.25rem;
  font-size: 15px;
  color: rgb(var(--c-fg));
  border-bottom: 1px solid rgb(var(--c-line) / 0.08);
}
.drawer-link:last-child { border-bottom: 0; }
.foot-link {
  color: rgb(var(--c-muted));
  transition: color 0.2s ease;
}
.foot-link:hover { color: rgb(var(--c-fg)); }

/* 图标按钮：正方形、药丸圆角，与全站圆角体系一致 */
.icon-btn {
  display: inline-grid;
  place-items: center;
  height: 38px;
  width: 38px;
  border-radius: 999px;
  border: 1px solid rgb(var(--c-line) / 0.12);
  color: rgb(var(--c-fg));
  background-color: transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.icon-btn:hover { background-color: rgb(var(--c-fg) / 0.06); }
.icon-btn:active { transform: scale(0.94); }

/* ---------------------------------------------------------------
   3. 按钮：只有两种，主按钮用墨色（对比度稳定达 AA），幽灵按钮用描边
   --------------------------------------------------------------- */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 44px;
  padding: 0 1.35rem;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  white-space: nowrap; /* 按钮文字永不换行 */
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.15s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.btn-primary {
  background-color: rgb(var(--c-fg));
  color: rgb(var(--c-bg));
  border: 1px solid rgb(var(--c-fg));
}
.btn-primary:hover { opacity: 0.88; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-ghost {
  background-color: transparent;
  color: rgb(var(--c-fg));
  border: 1px solid rgb(var(--c-line) / 0.18);
}
.btn-ghost:hover { background-color: rgb(var(--c-fg) / 0.06); }
.btn-ghost:active { transform: scale(0.98); }

/* ---------------------------------------------------------------
   4. 表单控件：标签在输入框上方，占位符对比度足够
   --------------------------------------------------------------- */
.field {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgb(var(--c-line) / 0.16);
  background-color: rgb(var(--c-bg));
  color: rgb(var(--c-fg));
  padding: 0.65rem 0.85rem;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.field::placeholder { color: rgb(var(--c-muted) / 0.85); }
.field:focus {
  outline: none;
  border-color: rgb(var(--c-accent));
  box-shadow: 0 0 0 3px rgb(var(--c-accent) / 0.18);
}
.field[aria-invalid="true"] { border-color: #d0453b; }

/* 全站统一的键盘焦点样式（可访问性） */
:focus-visible {
  outline: 2px solid rgb(var(--c-accent));
  outline-offset: 2px;
}

/* ---------------------------------------------------------------
   5. 骨架屏（替代转圈 loading，形状与最终内容一致，避免布局跳动）
   --------------------------------------------------------------- */
.skeleton,
.skeleton-post {
  border-radius: 20px;
  border: 1px solid rgb(var(--c-line) / 0.08);
  background-image: linear-gradient(
    100deg,
    rgb(var(--c-fg) / 0.04) 30%,
    rgb(var(--c-fg) / 0.08) 50%,
    rgb(var(--c-fg) / 0.04) 70%
  );
  background-size: 220% 100%;
  animation: shimmer 1.5s linear infinite;
}
.skeleton-post {
  height: 92px;
  border-radius: 0;
  border: 0;
  border-bottom: 1px solid rgb(var(--c-line) / 0.08);
}
@keyframes shimmer {
  from { background-position: 120% 0; }
  to { background-position: -120% 0; }
}

/* ---------------------------------------------------------------
   6. 滚动进场动画（极克制：只做 14px 位移 + 淡入）
   --------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s cubic-bezier(0.16, 0.84, 0.44, 1),
              transform 0.7s cubic-bezier(0.16, 0.84, 0.44, 1);
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* ---------------------------------------------------------------
   7. 作品卡片与标签
   --------------------------------------------------------------- */
.card-media {
  overflow: hidden;
  border-radius: 16px;
  background-color: rgb(var(--c-fg) / 0.05);
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16, 0.84, 0.44, 1), filter 0.4s ease;
}
.work-card:hover .card-media img { transform: scale(1.035); }
.work-card .card-title { transition: color 0.2s ease; }
.work-card:hover .card-title { color: rgb(var(--c-accent)); }
.work-arrow { transition: transform 0.3s cubic-bezier(0.16, 0.84, 0.44, 1); }
.work-card:hover .work-arrow { transform: translate(3px, -3px); }

.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 0.55rem;
  border-radius: 999px;
  border: 1px solid rgb(var(--c-line) / 0.14);
  font-size: 12px;
  color: rgb(var(--c-muted));
  white-space: nowrap;
}

/* ---------------------------------------------------------------
   7.1 GitHub 仓库卡片
       封面用「仓库语言配色」现场生成渐变，不请求任何外部图片：
       既省流量与图片解码内存，也不会因为占位图服务被墙而变成灰块。
       --cover 是语言色的 RGB 三元组，由 JS 内联注入。
   --------------------------------------------------------------- */
.repo-cover {
  position: relative;
  background-color: #0b0b0f;
  background-image:
    radial-gradient(120% 130% at 6% 0%, rgb(var(--cover, 226 88 20) / 0.46), transparent 58%),
    radial-gradient(90% 105% at 98% 100%, rgb(var(--cover, 226 88 20) / 0.2), transparent 62%),
    linear-gradient(165deg, #17171c 0%, #0a0a0e 100%);
  transition: filter 0.4s ease;
}
.work-card:hover .repo-cover {
  filter: brightness(1.14);
}

/* 细网格纹理：只在左上角渐显，给代码项目一点「工程感」 */
.repo-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(255 255 255 / 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(125% 120% at 12% 8%, #000 28%, transparent 74%);
  mask-image: radial-gradient(125% 120% at 12% 8%, #000 28%, transparent 74%);
  pointer-events: none;
}

/* 仓库名首字母水印 */
.repo-mark {
  position: absolute;
  right: -0.06em;
  bottom: -0.3em;
  font-size: clamp(120px, 15vw, 190px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgb(255 255 255 / 0.055);
  pointer-events: none;
  user-select: none;
}

.repo-cover-body {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  /* 封面只有仓库名一个元素，压在底部更像版面而不是居中占位 */
  justify-content: flex-end;
  padding: 18px 20px;
}

/* 语言：色点 + 文字，跟随主题色，不再做成压在封面上的胶囊 */
.repo-lang {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgb(var(--c-fg) / 0.72);
}
.repo-lang i {
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.repo-name {
  max-width: min(100%, 24ch);
  font-size: clamp(19px, 2.1vw, 26px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #f4f2ee;
  overflow-wrap: anywhere;
}

/* 覆盖整卡的透明链接：整张卡可点，且不与「在线预览」形成嵌套 <a> */
.work-card {
  position: relative;
}
.work-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.repo-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1rem;
  font-size: 12.5px;
  color: rgb(var(--c-muted));
}
.repo-stat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.repo-stat svg {
  width: 13px;
  height: 13px;
}
.repo-archived {
  padding: 0 0.5rem;
  border-radius: 999px;
  border: 1px solid rgb(var(--c-line) / 0.16);
  font-size: 11.5px;
}
/* 二级链接必须抬到覆盖层之上，否则点不到 */
.repo-live {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 0.55rem;
  border-radius: 999px;
  border: 1px solid rgb(var(--c-accent) / 0.35);
  color: rgb(var(--c-accent));
  font-size: 12px;
  transition: background-color 0.2s ease;
}
.repo-live:hover {
  background-color: rgb(var(--c-accent) / 0.1);
}

/* 技能强度条：细线，只有真实数据（1~5）才渲染 */
.level {
  display: inline-flex;
  gap: 3px;
}
.level i {
  display: block;
  width: 14px;
  height: 3px;
  border-radius: 2px;
  background-color: rgb(var(--c-line) / 0.14);
}
.level i.on { background-color: rgb(var(--c-accent)); }

/* ---------------------------------------------------------------
   8. 博客列表（编辑式列表，不是卡片墙）
   --------------------------------------------------------------- */
.post-row {
  display: grid;
  gap: 0.5rem 1.5rem;
  grid-template-columns: 1fr;
  align-items: baseline;
  padding: 1.5rem 0;
  border-bottom: 1px solid rgb(var(--c-line) / 0.09);
  transition: background-color 0.25s ease;
}
@media (min-width: 768px) {
  .post-row { grid-template-columns: 7.5rem 1fr auto; }
}
.post-row:hover { background-color: rgb(var(--c-fg) / 0.025); }
.post-row .post-title { transition: color 0.22s ease; }
.post-row:hover .post-title { color: rgb(var(--c-accent)); }

/* ---------------------------------------------------------------
   9. Markdown 正文排版（自己写，替代体积更大的 typography 插件）
   --------------------------------------------------------------- */
.md-body {
  font-size: 16.5px;
  line-height: 1.78;
  color: rgb(var(--c-fg) / 0.92);
  word-wrap: break-word;
}
.md-body > * + * { margin-top: 1.1em; }
.md-body h2 {
  font-family: "Space Grotesk", Outfit, sans-serif;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 2em;
  line-height: 1.3;
}
.md-body h3 {
  font-family: "Space Grotesk", Outfit, sans-serif;
  font-size: 19px;
  font-weight: 600;
  margin-top: 1.6em;
}
.md-body a {
  color: rgb(var(--c-accent));
  text-decoration: underline;
  text-underline-offset: 3px;
}
.md-body strong { font-weight: 600; }
.md-body ul, .md-body ol { padding-left: 1.35em; }
.md-body ul { list-style: disc; }
.md-body ol { list-style: decimal; }
.md-body li + li { margin-top: 0.4em; }
.md-body blockquote {
  border-left: 2px solid rgb(var(--c-accent));
  padding: 0.15em 0 0.15em 1em;
  color: rgb(var(--c-muted));
  font-style: normal;
}
.md-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.15em 0.4em;
  border-radius: 6px;
  background-color: rgb(var(--c-fg) / 0.07);
}
.md-body pre {
  overflow-x: auto;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  background-color: rgb(var(--c-fg) / 0.06);
  border: 1px solid rgb(var(--c-line) / 0.08);
}
.md-body pre code { background: transparent; padding: 0; font-size: 13.5px; line-height: 1.65; }
.md-body img { border-radius: 14px; max-width: 100%; height: auto; }
.md-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  display: block;
  overflow-x: auto;
}
.md-body th, .md-body td {
  border: 1px solid rgb(var(--c-line) / 0.12);
  padding: 0.5rem 0.7rem;
  text-align: left;
}
.md-body th { background-color: rgb(var(--c-fg) / 0.04); font-weight: 600; }
.md-body hr { border: 0; border-top: 1px solid rgb(var(--c-line) / 0.12); }

/* ---------------------------------------------------------------
   10. 文章阅读层（原生 dialog）
   --------------------------------------------------------------- */
.reader {
  width: 100%;
  max-width: 100%;
  height: 100%;
  max-height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background-color: rgb(var(--c-bg) / 0.86);
  backdrop-filter: blur(10px);
  color: rgb(var(--c-fg));
}
.reader::backdrop { background-color: rgb(0 0 0 / 0.44); }
.reader-inner {
  margin: 0 auto;
  max-width: 760px;
  padding: 5.5rem 1.25rem 5rem;
}
@media (min-width: 640px) {
  .reader-inner { padding: 6rem 2rem 6rem; }
}
.reader[open] .reader-inner { animation: readerIn 0.34s cubic-bezier(0.16, 0.84, 0.44, 1) both; }
@keyframes readerIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.reader-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgb(var(--c-line) / 0.1);
}
.reader-meta {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  color: rgb(var(--c-muted));
}
.reader-body-wrap { padding-top: 2rem; }
.reader-foot {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgb(var(--c-line) / 0.1);
}

/* ---------------------------------------------------------------
   11. 滚动条与选中色
   --------------------------------------------------------------- */
::selection { background-color: rgb(var(--c-accent) / 0.24); }
* { scrollbar-width: thin; scrollbar-color: rgb(var(--c-line) / 0.25) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background-color: rgb(var(--c-line) / 0.2);
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background-color: rgb(var(--c-line) / 0.32); }

/* ---------------------------------------------------------------
   12. 无障碍：尊重"减少动态效果"的系统设置
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .skeleton, .skeleton-post { animation: none; }
  .card-media img, .work-arrow, .reader[open] .reader-inner,
  .repo-cover, .repo-live { transition: none; animation: none; }
  html.theme-anim, html.theme-anim body { transition: none; }
}

/* 打印时不输出氛围层 */
@media print {
  .grain, .aurora, header, footer, .reader-foot { display: none !important; }
}