/* Moments — WeChat Moments style visual interpretation for BroadcastChannel Base.
   Original implementation; inspired by the icefox (xiaopanglian) visual direction, no upstream code.
   Follows the system light/dark preference. Load via HEADER_INJECT only. */

:root {
  --width: 600px;
  --body-padding-inline: 0px;
  --font-main:
    -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Segoe UI', 'Microsoft YaHei', 'Helvetica Neue', Roboto,
    sans-serif;
  --font-secondary:
    -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Segoe UI', 'Microsoft YaHei', 'Helvetica Neue', Roboto,
    sans-serif;
  --font-scale: 1rem;
  --background-color: #fff;
  --heading-color: #1a1a1a;
  --text-color: #1a1a1a;
  --link-color: #576b95;
  --visited-color: #576b95;
  --feed-meta-visited-color: #576b95;
  --code-background-color: #f7f7f7;
  --code-color: #1a1a1a;
  --blockquote-color: #576b95;
  --accent-color: #07c160;
  --border-color: rgba(0, 0, 0, 0.09);
  --focus-color: #07c160;
  --link-hover-color: #42577e;
  --muted-color: #9a9a9a;
  --surface-color: #fff;
  --moments-page-bg: #ededed;
  --moments-line: rgba(0, 0, 0, 0.07);
  --moments-bar-bg: #f7f7f7;
  --moments-time-color: #b2b2b2;
  --moments-cover-height: clamp(240px, 42vw, 320px);
  --reaction-paid-color: #6b5000;
  --reaction-paid-border-color: rgba(107, 80, 0, 0.34);
  --reaction-paid-background-color: #f3ead0;
  --code-muted-color: #6f6f6f;
  --code-accent-color: #43598c;
  --code-alt-accent-color: #6f5a94;
  --shadow-soft: none;
  --radius-panel: 8px;
  --radius-chip: 999px;
  --radius-media: 6px;
  --box-margin: 0px;
  --back-to-top-offset: max(1.25rem, env(safe-area-inset-right));
  --icon-hover-filter: none;
  --icon-secondary-filter: grayscale(1) opacity(0.6);
}

/* Dark palette is duplicated: system preference (unless user overrides) and explicit [data-theme='dark'].
   Keep the two blocks in sync. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --background-color: #191919;
    --heading-color: #e8e8e8;
    --text-color: #d4d4d4;
    --link-color: #7d90a9;
    --visited-color: #7d90a9;
    --feed-meta-visited-color: #7d90a9;
    --code-background-color: #242424;
    --code-color: #d4d4d4;
    --blockquote-color: #7d90a9;
    --accent-color: #07c160;
    --border-color: rgba(255, 255, 255, 0.12);
    --focus-color: #07c160;
    --link-hover-color: #97a8c4;
    --muted-color: #7a7a7a;
    --surface-color: #191919;
    --moments-page-bg: #111111;
    --moments-line: rgba(255, 255, 255, 0.09);
    --moments-bar-bg: #242424;
    --moments-time-color: #6e6e6e;
    --reaction-paid-color: #f3cc65;
    --reaction-paid-border-color: rgba(243, 204, 101, 0.5);
    --reaction-paid-background-color: rgba(243, 204, 101, 0.14);
    --code-muted-color: #8d8d8d;
    --code-accent-color: #97a8c4;
    --code-alt-accent-color: #ab97c9;
  }
}

:root[data-theme='dark'] {
  --background-color: #191919;
  --heading-color: #e8e8e8;
  --text-color: #d4d4d4;
  --link-color: #7d90a9;
  --visited-color: #7d90a9;
  --feed-meta-visited-color: #7d90a9;
  --code-background-color: #242424;
  --code-color: #d4d4d4;
  --blockquote-color: #7d90a9;
  --accent-color: #07c160;
  --border-color: rgba(255, 255, 255, 0.12);
  --focus-color: #07c160;
  --link-hover-color: #97a8c4;
  --muted-color: #7a7a7a;
  --surface-color: #191919;
  --moments-page-bg: #111111;
  --moments-line: rgba(255, 255, 255, 0.09);
  --moments-bar-bg: #242424;
  --moments-time-color: #6e6e6e;
  --reaction-paid-color: #f3cc65;
  --reaction-paid-border-color: rgba(243, 204, 101, 0.5);
  --reaction-paid-background-color: rgba(243, 204, 101, 0.14);
  --code-muted-color: #8d8d8d;
  --code-accent-color: #97a8c4;
  --code-alt-accent-color: #ab97c9;
}

html {
  max-width: 100%;
  background: var(--moments-page-bg);
  overflow-x: clip;
}

html[data-theme='light'] {
  color-scheme: light;
}

html[data-theme='dark'] {
  color-scheme: dark;
}

body {
  min-width: 0;
  max-width: calc(var(--width) + var(--body-padding-inline) + var(--body-padding-inline));
  margin: 0 auto;
  padding: 0;
  background: var(--background-color);
  color: var(--text-color);
  font-family: var(--font-secondary);
  font-size: var(--font-scale);
  line-height: 1.55;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(7, 193, 96, 0.22);
}

button,
input,
summary {
  font: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 3px;
}

/* ---------- Cover header ---------- */

.site-header {
  position: relative;
  display: block;
  margin: 0;
  padding: var(--moments-cover-height) 16px 0;
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: var(--moments-cover-height);
  background-color: #39454f;
  background-image: var(--moments-cover-image, linear-gradient(168deg, #55677a 0%, #2b3947 55%, #131b23 100%));
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.site-header > .avatar-link {
  position: absolute;
  top: calc(var(--moments-cover-height) - 64px - 14px);
  right: 14px;
  width: 64px;
  height: 64px;
  border-radius: 8px;
}

.site-header > .avatar-link .channel-avatar,
.site-header > .avatar-link img.channel-avatar {
  width: 64px;
  height: 64px;
  border-radius: 8px;
  background: #d7dade;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.site-header > .title {
  position: absolute;
  top: calc(var(--moments-cover-height) - 64px - 14px + 18px);
  right: 92px;
  max-width: 58%;
  overflow: hidden;
  color: #fff;
  text-align: right;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header > .title:visited {
  color: #fff;
}

.site-header > .title:hover {
  color: #fff;
  text-decoration: none;
}

.site-header > .title > h1 {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 600;
  line-height: 1.4;
}

.site-header > .social-links {
  position: absolute;
  top: 12px;
  right: 14px;
  gap: 0.4rem;
  justify-self: auto;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.45));
}

.site-header > .social-links a {
  color: #fff;
  font-size: 1.05rem;
}

.site-header > .social-links a:hover {
  color: #fff;
  opacity: 0.85;
}

.site-header > .channel-description {
  margin-top: 14px;
  color: var(--muted-color);
  font-size: 0.875em;
}

.site-header > .channel-description.content p {
  margin-block: 0.35em;
}

.site-navigation {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin: 0;
  padding: 0.65rem 0 0.7rem;
}

.site-navigation > ul {
  display: flex;
  flex: 1 1 auto;
  gap: 1.1rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-navigation a,
.site-navigation a:visited {
  color: var(--text-color);
  font-size: 0.9em;
  text-decoration: none;
}

.site-navigation a:hover,
.site-navigation a[aria-current='page'] {
  color: var(--accent-color);
  text-decoration: none;
}

.desktop-search,
.mobile-search form {
  width: min(12rem, 100%);
  border: 0;
  border-radius: var(--radius-panel);
  background: var(--moments-bar-bg);
}

.search-field {
  padding: 0.25rem 0.4rem;
}

.search-input {
  font-size: 0.85em;
}

.search-input::placeholder {
  color: var(--muted-color);
  opacity: 1;
}

.search-input:focus-visible {
  outline: 0;
}

/* ---------- Feed ---------- */

#main-content {
  min-width: 0;
  padding: 4px 16px 28px;
}

.posts-feed {
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-entry {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 12px;
  margin: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--moments-line);
  background: transparent;
}

.posts-feed > li:last-child .post-entry {
  margin-bottom: 0;
  padding-bottom: 16px;
  border-bottom: 0;
}

.post-entry-avatar {
  display: block;
  grid-column: 1;
  grid-row: 1 / span 9;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: #d7dade;
  object-fit: cover;
}

.post-entry-author {
  display: block;
  grid-column: 2;
  margin: 0;
  color: var(--link-color);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.hn-story {
  display: block;
  grid-column: 2;
  order: 1;
  margin-top: 4px;
}

.hn-story h2 {
  margin: 0;
  color: var(--heading-color);
  font-size: 1.02em;
  font-weight: 700;
  line-height: 1.45;
}

.hn-story h2 a,
.hn-story h2 a:visited {
  color: var(--heading-color);
  text-decoration: none;
}

.hn-story h2 a:hover {
  color: var(--link-color);
}

.post-meta {
  display: none;
}

.post-content {
  grid-column: 2;
  order: 1;
  margin-top: 5px;
  padding-top: 0;
  color: var(--text-color);
  font-size: 0.9375rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

/* post.tags 均来自正文内联的 #标签 链接，底部标签行与正文重复，朋友圈形态下直接隐藏 */
.post-tags {
  display: none;
}

.tag-icon {
  display: none;
}

.post-reactions {
  grid-column: 2;
  order: 3;
  margin-top: 10px;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-panel);
  background: var(--moments-bar-bg);
}

.post-reactions > ul {
  gap: 0.55rem;
  align-items: center;
}

.reaction {
  gap: 0.28rem;
  color: var(--link-color);
  font-size: 0.8rem;
}

.reaction-paid {
  border: 1px solid var(--reaction-paid-border-color);
  background: var(--reaction-paid-background-color);
  color: var(--reaction-paid-color);
}

.reaction-image {
  width: 1.05em;
  height: 1.05em;
  border-radius: 2px;
}

.tg-message-meta {
  display: flex;
  grid-column: 2;
  order: 4;
  align-items: center;
  justify-content: space-between;
  margin: 8px 0 0;
  color: var(--moments-time-color);
  font-size: 0.8125rem;
  line-height: 1.4;
}

.tg-message-meta::after {
  content: '\00b7\00b7\00b7';
  flex: 0 0 auto;
  letter-spacing: 2px;
  opacity: 0.75;
}

.tg-message-meta a,
.tg-message-meta a:visited {
  color: inherit;
  text-decoration: none;
}

.tg-message-meta a:hover {
  color: var(--link-color);
  text-decoration: none;
}

.post-comments {
  grid-column: 2;
  order: 5;
  padding-top: 12px;
}

/* 评论 widget 容器：深色下不再沿用 Base 的强制白底。
   telegram-widget.js 不支持 data-dark 参数，故对跨域 iframe 整体做反色适配（行业通用做法） */
[data-theme='dark'] .post-comments {
  border: 0;
  background: transparent;
}

[data-theme='dark'] .post-comments iframe {
  background: #fff;
  filter: invert(1) hue-rotate(180deg);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme='light']) .post-comments {
    border: 0;
    background: transparent;
  }

  html:not([data-theme='light']) .post-comments iframe {
    background: #fff;
    filter: invert(1) hue-rotate(180deg);
    color-scheme: dark;
  }
}

.post-comments iframe {
  width: 100% !important;
  min-width: 0 !important;
}

/* ---------- Pagination / directory / footer ---------- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
}

.pagination a {
  display: inline-flex;
  gap: 0.3rem;
  align-items: center;
  width: auto;
  height: auto;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-chip);
  background: var(--moments-bar-bg);
  color: var(--text-color);
  font-size: 0.8125rem;
}

.pagination a:visited {
  color: var(--text-color);
}

.pagination a:hover {
  background: var(--moments-page-bg);
  color: var(--accent-color);
  text-decoration: none;
}

.pagination a svg {
  width: 1em;
  height: 1em;
}

.pagination .newer {
  margin-left: 0;
}

.directory {
  padding: 1.25rem 0 0;
}

.directory h1 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
}

.directory-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.25rem;
  align-items: stretch;
  margin: 0;
  padding: 0;
  list-style: none;
}

.directory-list a {
  display: flex;
  min-height: 2.9rem;
  align-items: center;
  border-bottom: 1px solid var(--moments-line);
  color: var(--link-color);
  overflow-wrap: anywhere;
}

.directory-list a:visited {
  color: var(--link-color);
}

.site-footer {
  margin-top: 2rem;
  padding: 1.25rem 16px 1.75rem;
  border-top: 1px solid var(--moments-line);
  color: var(--muted-color);
  font-size: 0.75rem;
  text-align: center;
}

.site-footer a,
.site-footer a:visited {
  color: var(--link-color);
}

#back-to-top {
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--surface-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

/* back-to-top 图标是 currentColor 的 <img>，深色下解析为黑色不可见，反色提亮 */
[data-theme='dark'] #back-to-top img {
  filter: grayscale(1) invert(1) opacity(0.75);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme='light']) #back-to-top img {
    filter: grayscale(1) invert(1) opacity(0.75);
  }
}

/* ---------- Theme toggle ---------- */

#theme-toggle {
  position: fixed;
  z-index: 50;
  right: var(--back-to-top-offset);
  bottom: calc(var(--back-to-top-offset) + 2.5rem);
  display: flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--surface-color);
  color: var(--text-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: transform 180ms ease;
}

#theme-toggle:hover {
  color: var(--accent-color);
  transform: translateY(-0.2rem);
}

#theme-toggle svg {
  width: 1.05rem;
  height: 1.05rem;
}

#theme-toggle .icon-sun {
  display: none;
}

#theme-toggle .icon-moon {
  display: block;
}

[data-theme='dark'] #theme-toggle .icon-sun {
  display: block;
}

[data-theme='dark'] #theme-toggle .icon-moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme='light']) #theme-toggle .icon-sun {
    display: block;
  }

  html:not([data-theme='light']) #theme-toggle .icon-moon {
    display: none;
  }
}

/* ---------- Content treatments ---------- */

.content {
  color: var(--text-color);
  overflow-wrap: anywhere;
}

.content p,
.content ul,
.content ol {
  margin-block: 0.55em;
}

.content h1,
.content h2,
.content h3 {
  color: var(--heading-color);
  font-size: 1em;
}

.content a,
.content a:visited {
  color: var(--link-color);
}

.content blockquote {
  margin: 0.6em 0;
  padding: 0.5em 0.8em;
  border-left: 3px solid var(--accent-color);
  border-radius: 0 var(--radius-panel) var(--radius-panel) 0;
  background: var(--moments-bar-bg);
  color: var(--blockquote-color);
}

.content pre,
.highlight,
.code {
  max-width: 100%;
  overflow-x: auto;
  border: 0;
  border-radius: var(--radius-panel);
  background: var(--code-background-color);
}

.highlight pre,
.code pre {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.content :not(pre) > code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--code-background-color);
}

.content img:not(.tg-emoji):not(.sticker):not(.link_preview_image):not(.modal-img) {
  border-radius: var(--radius-media);
}

.content .image-list-container {
  gap: 4px;
}

.content .image-list-container img {
  border-radius: 0;
}

.content .tgme_widget_message_video,
.content .tgme_widget_message_roundvideo,
.content > video:not(.sticker) {
  border-radius: var(--radius-media);
}

.content .sticker {
  border-radius: 0;
}

.content .tgme_widget_message_link_preview {
  border-radius: var(--radius-panel);
}

/* ---------- Small screens ---------- */

@media (max-width: 37.5rem) {
  :root {
    --moments-cover-height: clamp(210px, 52vw, 280px);
  }

  .site-header {
    padding: var(--moments-cover-height) 12px 0;
  }

  .site-header > .avatar-link,
  .site-header > .avatar-link .channel-avatar {
    top: calc(var(--moments-cover-height) - 54px - 12px);
    right: 12px;
    width: 54px;
    height: 54px;
  }

  .site-header > .title {
    top: calc(var(--moments-cover-height) - 54px - 12px + 14px);
    right: 78px;
  }

  .site-header > .title > h1 {
    font-size: 1rem;
  }

  #main-content {
    padding: 2px 12px 24px;
  }

  .post-entry {
    grid-template-columns: 38px minmax(0, 1fr);
    column-gap: 10px;
    padding: 14px 0;
  }

  .post-entry-avatar {
    width: 38px;
    height: 38px;
  }

  .post-content {
    font-size: 0.9rem;
  }

  .directory-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .desktop-search {
    display: none;
  }

  .mobile-search {
    display: block;
    margin-left: auto;
  }

  .mobile-search[open] {
    width: 100%;
  }

  .mobile-search summary {
    display: flex;
    width: 2.6rem;
    height: 2.6rem;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    color: var(--text-color);
    cursor: pointer;
    list-style: none;
  }

  .mobile-search summary::-webkit-details-marker {
    display: none;
  }

  .mobile-search form {
    width: 100%;
    margin-top: 0.5rem;
  }

  .mobile-search .search-input {
    font-size: 16px;
  }

  .site-navigation {
    align-items: flex-start;
    flex-wrap: wrap;
  }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after,
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Print ---------- */

@media print {
  :root {
    --background-color: #fff;
    --heading-color: #000;
    --text-color: #111;
    --link-color: #000;
    --visited-color: #000;
    --code-background-color: #f2f2f2;
    --code-color: #000;
  }

  html,
  body {
    max-width: none;
    background: #fff;
    color: #111;
  }

  .site-header {
    display: block;
    padding: 0 0 0.75rem;
    border-bottom: 1px solid #777;
  }

  .site-header::before,
  .site-header > .avatar-link,
  .site-header > .social-links,
  .site-navigation,
  .skip-link,
  .post-entry-avatar,
  .post-reactions,
  .post-comments,
  .pagination,
  .site-footer,
  #theme-toggle,
  #back-to-top-wrapper,
  .tg-message-meta::after {
    display: none !important;
  }

  .site-header > .title {
    position: static;
    display: block;
    max-width: none;
    overflow: visible;
    color: #000;
    text-align: left;
    text-shadow: none;
    white-space: normal;
  }

  .post-entry {
    display: block;
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid #aaa;
  }

  .post-entry-author,
  .post-content,
  .tg-message-meta,
  .post-tags,
  .post-comments {
    grid-column: auto;
  }

  .post-entry-author {
    color: #000;
  }

  .tg-message-meta {
    color: #555;
  }

  a:link,
  a:visited {
    color: #000;
    text-decoration: underline;
  }

  .content pre {
    overflow: visible;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }

  .content .tg-expandable__content {
    display: block;
    overflow: visible;
    line-clamp: unset;
    -webkit-line-clamp: unset;
  }
}