/* Optional warm-paper override for BroadcastChannel Base. */
:root {
  --width: 720px;
  --body-padding-inline: 1.25rem;
  --font-main: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-scale: 1em;

  /* === Warm Paper Palette (unchanged) === */
  --background-color: #faf6f0;
  --heading-color: #2c2825;
  --text-color: #3d3833;
  --link-color: #6b7b8a;
  --visited-color: #7a6a5a;
  --code-background-color: #f5f1eb;
  --code-color: #2c2825;
  --blockquote-color: #5c5650;

  --accent-color: #c25e2e;
  --border-color: rgba(60, 42, 20, 0.08);
  --link-hover-color: #3a4550;
  --muted-color: #9a8d7e;
  --surface-color: #fff;
  --reaction-paid-color: #7a5f20;
  --reaction-paid-border-color: rgba(122, 95, 32, 0.3);
  --reaction-paid-background-color: #f5ead5;

  /* === Elevation: Apple-style layered shadows === */
  --shadow-ambient: 0 0.5px 1px rgba(60, 42, 20, 0.04);
  --shadow-soft: 0 1px 2px rgba(60, 42, 20, 0.04), 0 2px 8px rgba(60, 42, 20, 0.03);
  --shadow-card: 0 1px 3px rgba(60, 42, 20, 0.05), 0 4px 12px rgba(60, 42, 20, 0.03);
  --shadow-hover: 0 2px 8px rgba(60, 42, 20, 0.06), 0 12px 28px rgba(60, 42, 20, 0.04);
  --shadow-modal: 0 4px 16px rgba(60, 42, 20, 0.08), 0 16px 48px rgba(60, 42, 20, 0.05);

  /* === Radius: Apple-style softer corners === */
  --radius-panel: 8px;
  --radius-chip: 6px;
  --radius-media: 10px;

  /* === Spacing: 4px grid system === */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* === Transition: Apple-style ease-out === */
  --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  color-scheme: light;
  scrollbar-width: thin;
  scrollbar-color: rgba(60, 42, 20, 0.12) transparent;
  scrollbar-gutter: stable;
}

body {
  padding-inline: var(--body-padding-inline);
  background: var(--background-color);
  color: var(--text-color);
  font-size: 100%;
  letter-spacing: -0.004em;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings:
    'kern' 1,
    'liga' 1;
}

main {
  line-height: 1.7;
}

/* === Typography: Apple-style hierarchy === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--heading-color);
}

h1 {
  font-weight: 700;
  letter-spacing: -0.03em;
}

/* === Selection === */
::selection {
  background: rgba(194, 94, 46, 0.15);
  color: var(--heading-color);
}

/* === Scrollbar (WebKit/Blink) === */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(60, 42, 20, 0.12);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(60, 42, 20, 0.22);
}

/* === Caret color === */
input[type='text'],
input[type='search'] {
  caret-color: var(--accent-color);
}

/* === Links: Apple-style subtle underline === */
a {
  text-decoration: underline transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition:
    text-decoration-color 200ms var(--ease-out),
    color 200ms var(--ease-out);
}

a:link,
a:visited {
  text-decoration-color: transparent;
}

a:hover {
  text-decoration-color: var(--link-hover-color);
}

/* === View transition: Apple-style smooth === */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 250ms;
  animation-timing-function: var(--ease-out);
}

/* === Numeric alignment === */
time,
.pagination a,
.post-meta {
  font-variant-numeric: tabular-nums;
}

/* === Site Header === */
.site-header {
  align-items: center;
  margin-bottom: 0;
  padding-top: var(--space-4);
}

.site-header > .avatar-link,
.site-header > .title {
  height: 2.75rem;
  align-items: center;
}

.site-header > .avatar-link {
  display: inline-flex;
}

.site-header > .title > h1 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--heading-color);
  letter-spacing: -0.03em;
}

/* === Avatar: Apple-style clean === */
.channel-avatar {
  width: 2.75rem;
  height: 2.75rem;
  border: 2.5px solid var(--surface-color);
  box-shadow: var(--shadow-soft);
  border-radius: 50%;
  transition: box-shadow 200ms var(--ease-out);
}

.channel-avatar:hover {
  box-shadow: var(--shadow-card);
}

/* === Social Links: Apple-style minimal === */
.social-links {
  gap: 0.12rem;
}

.social-links a {
  width: 1.75rem;
  height: 1.75rem;
  color: var(--muted-color);
  opacity: 0.65;
  transition:
    color 200ms var(--ease-out),
    opacity 200ms var(--ease-out),
    transform 200ms var(--ease-out);
}

.social-links a:hover {
  color: var(--heading-color);
  opacity: 1;
  transform: translateY(-1px);
}

/* === Channel Description: Apple-style card === */
.channel-description {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-panel);
  background: var(--surface-color);
  color: var(--muted-color);
  box-shadow: var(--shadow-ambient);
  line-height: 1.6;
  transition: box-shadow 200ms var(--ease-out);
}

.channel-description:hover {
  box-shadow: var(--shadow-soft);
}

/* === Navigation: Apple-style minimal === */
.site-navigation {
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-block: 1px solid var(--border-color);
}

.site-header > .site-navigation {
  margin-top: var(--space-2);
}

.site-navigation > ul {
  gap: 0.15rem;
}

.site-navigation a {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-chip);
  color: var(--heading-color);
  font-weight: 500;
  font-size: 0.95em;
  transition:
    background-color 200ms var(--ease-out),
    color 200ms var(--ease-out),
    transform 150ms var(--ease-out);
}

.site-navigation a:hover {
  background: color-mix(in srgb, var(--surface-color) 85%, transparent);
  text-decoration: none;
  color: var(--accent-color);
  transform: translateY(-0.5px);
}

.site-navigation a[aria-current='page'] {
  background: color-mix(in srgb, var(--surface-color) 85%, transparent);
  text-decoration: none;
  color: var(--accent-color);
  font-weight: 600;
}

/* === Search: Apple-style input === */
.desktop-search,
.mobile-search form {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-chip);
  background: color-mix(in srgb, var(--background-color) 80%, transparent);
  transition:
    border-color 200ms var(--ease-out),
    box-shadow 200ms var(--ease-out);
}

.desktop-search:focus-within,
.mobile-search form:focus-within {
  border-color: color-mix(in srgb, var(--accent-color) 25%, var(--border-color));
  box-shadow: 0 0 0 3px rgba(194, 94, 46, 0.08);
}

/* === Main Content === */
#main-content {
  padding-top: var(--space-8);
}

/* === Posts Feed === */
.posts-feed {
  margin-left: var(--space-6);
}

/* === Post Entry === */
.post-entry {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
  /* Performance: skip rendering for off-screen posts */
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

/* === Post Meta: refined timeline === */
.post-meta {
  line-height: 1;
  display: flex;
  align-items: center;
}

.timeline-dot {
  display: block;
  width: 7px;
  height: 7px;
  flex: 0 0 7px;
  border-radius: 50%;
  background: var(--accent-color);
  box-shadow: 0 0 0 2px var(--background-color);
  transition: transform 200ms var(--ease-spring);
}

.post-entry:hover .timeline-dot {
  transform: scale(1.15);
}

.post-meta p {
  padding-left: 0.65rem;
  color: var(--accent-color);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.post-meta a:link,
.post-meta a:visited {
  color: var(--accent-color);
  text-decoration: none;
}

.post-meta a:hover {
  text-decoration: none;
  opacity: 0.75;
}

/* === Post Content Rail: refined with warm tint === */
.post-content,
.post-reactions,
.post-tags,
.post-comments {
  margin-left: 3px;
  padding-left: var(--space-8);
  border-left: 1.5px solid var(--border-color);
  transition: border-color 200ms var(--ease-out);
}

.post-entry:hover .post-content,
.post-entry:hover .post-reactions,
.post-entry:hover .post-tags,
.post-entry:hover .post-comments {
  border-left-color: color-mix(in srgb, var(--accent-color) 15%, var(--border-color));
}

.post-content {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

/* Mobile: larger line-height for thumb scrolling */
.post-content.content {
  line-height: 1.75;
  word-break: break-word;
}

.post-reactions {
  padding-top: 0;
  padding-bottom: var(--space-6);
}

.post-tags {
  padding-top: 0;
  padding-bottom: var(--space-5);
}

.post-comments {
  padding-top: var(--space-2);
  padding-bottom: var(--space-6);
}

.post-entry > .post-meta + .post-tags,
.post-entry > .post-meta + .post-reactions {
  padding-top: var(--space-8);
}

/* === Reactions: Apple-style pills === */
.reaction {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--code-background-color);
  color: var(--muted-color);
  font-size: 0.9em;
  transition:
    background-color 200ms var(--ease-out),
    border-color 200ms var(--ease-out),
    transform 150ms var(--ease-out);
  cursor: default;
}

.reaction:hover {
  background: var(--surface-color);
  border-color: color-mix(in srgb, var(--accent-color) 15%, var(--border-color));
  transform: translateY(-1px);
  box-shadow: var(--shadow-ambient);
}

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

/* === Tags: Apple-style chips === */
.tags {
  gap: var(--space-2);
}

.tags a:link,
.tags a:visited {
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-chip);
  background: var(--code-background-color);
  color: var(--muted-color);
  text-decoration: none;
  font-size: 0.85em;
  font-weight: 500;
  transition:
    background-color 200ms var(--ease-out),
    color 200ms var(--ease-out),
    border-color 200ms var(--ease-out),
    transform 150ms var(--ease-out);
}

.tags a:hover {
  background: var(--surface-color);
  color: var(--accent-color);
  border-color: color-mix(in srgb, var(--accent-color) 20%, var(--border-color));
  transform: translateY(-1px);
  box-shadow: var(--shadow-ambient);
}

.post-tags .tag-icon {
  display: inline-block;
}

/* === Pagination: Apple-style circular === */
.pagination a {
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--code-background-color);
  color: var(--muted-color);
  transition:
    color 200ms var(--ease-out),
    background-color 200ms var(--ease-out),
    border-color 200ms var(--ease-out),
    transform 150ms var(--ease-out);
}

.pagination a:hover {
  color: var(--accent-color);
  background: var(--surface-color);
  border-color: color-mix(in srgb, var(--accent-color) 20%, var(--border-color));
  transform: translateY(-1px);
  box-shadow: var(--shadow-ambient);
}

/* === Directory === */
.directory-list {
  display: block;
  columns: 2;
  column-gap: 2.5rem;
  column-rule: 1px solid var(--border-color);
}

.directory-list li {
  margin-bottom: var(--space-2);
  break-inside: avoid;
}

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-4);
  padding-bottom: 0;
  color: var(--muted-color);
  text-align: left;
  font-size: 0.9em;
}

/* === Back to Top: Apple-style subtle === */
#back-to-top {
  border: 1px solid var(--border-color);
  background: var(--surface-color);
  box-shadow: var(--shadow-soft);
  border-radius: var(--radius-panel);
  transition:
    background-color 200ms var(--ease-out),
    box-shadow 200ms var(--ease-out),
    transform 150ms var(--ease-out);
}

#back-to-top:hover {
  background: var(--code-background-color);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

/* === Content Paragraphs === */
.content p {
  margin: 0.9em 0;
}

/* === Content Media: Apple-style clean === */
.content img:not(.tg-emoji):not(.sticker):not(.link_preview_image):not(.modal-img):not(.og-card-thumb),
.content video:not(.sticker),
.content > iframe {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
  display: block !important;
  border-radius: var(--radius-media);
}

.content .image-list-container {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
  display: grid !important;
  grid-template-rows: auto !important;
}

/* Subtle shadow on single images and videos */
.content .image-list-container.image-count-1 .image-preview-wrap img,
.content video:not(.sticker) {
  box-shadow: var(--shadow-soft) !important;
  transition:
    box-shadow 200ms var(--ease-out),
    transform 200ms var(--ease-out);
}

.content .image-list-container.image-count-1 .image-preview-wrap img:hover,
.content video:not(.sticker):hover {
  box-shadow: var(--shadow-card) !important;
  transform: translateY(-1px);
}

/* PC: left-aligned with refined width */
@media (min-width: 37.5rem) {
  /* PC: content body 17px for comfortable reading */
  .post-content.content {
    font-size: 1.0625em;
    line-height: 1.7;
  }

  .content img:not(.tg-emoji):not(.sticker):not(.link_preview_image):not(.modal-img):not(.og-card-thumb),
  .content video:not(.sticker),
  .content > iframe {
    width: auto !important;
    max-width: min(100%, calc(var(--width) * 0.82)) !important;
    max-height: 75vh !important;
    margin: 0 !important;
    margin-left: 0 !important;
    margin-right: auto !important;
    object-fit: contain;
  }

  .content .image-list-container {
    width: auto !important;
    max-width: 480px !important;
    margin: 0 !important;
    margin-left: 0 !important;
    margin-right: auto !important;
  }

  /* Single image gets wider max-width */
  .content .image-list-container.image-count-1 {
    max-width: min(100%, calc(var(--width) * 0.82)) !important;
  }

  /* Multi-image grids: wider container for better layout */
  .content .image-list-container.image-count-2,
  .content .image-list-container.image-count-3,
  .content .image-list-container.image-count-4 {
    max-width: min(100%, calc(var(--width) * 0.82)) !important;
  }

  /* PC: smart grid overrides for mixed layouts */
  .content .image-list-container.grid-3-mixed {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    grid-template-rows: auto auto !important;
  }

  .content .image-list-container.grid-3-mixed .image-preview-wrap:nth-of-type(1) {
    grid-column: 1 !important;
    grid-row: 1 !important;
  }

  .content .image-list-container.grid-3-mixed .image-preview-wrap:nth-of-type(2) {
    grid-column: 2 !important;
    grid-row: 1 !important;
  }

  .content .image-list-container.grid-3-mixed .image-preview-wrap:nth-of-type(3) {
    grid-column: 1 / 3 !important;
    grid-row: 2 !important;
  }

  .content .image-list-container.grid-5-mixed {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  .content .image-list-container.grid-7-mixed {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .content .image-list-container.grid-7-mixed .image-preview-wrap:nth-of-type(3) {
    grid-column: 1 / 3 !important;
  }

  .content .image-list-container.grid-8-mixed {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  /* 5+ images: keep compact width for density */
  .content .image-list-container.image-count-5,
  .content .image-list-container.image-count-6,
  .content .image-list-container.image-count-7,
  .content .image-list-container.image-count-8,
  .content .image-list-container.image-count-9 {
    max-width: min(100%, 560px) !important;
  }
}

/* Mobile: single image max-height to avoid long images dominating */
@media (max-width: 37.5rem) {
  .content .image-list-container.image-count-1 .image-preview-wrap img {
    max-height: 75vh;
    object-fit: contain;
  }

  /* Mobile: smart grid overrides for mixed layouts */
  .content .image-list-container.grid-3-mixed {
    grid-template-columns: 1fr 1fr !important;
  }

  .content .image-list-container.grid-3-mixed .image-preview-wrap:nth-of-type(3) {
    grid-column: 1 / 3 !important;
    max-width: 100% !important;
    margin: 0 !important;
  }

  .content .image-list-container.grid-5-mixed {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  .content .image-list-container.grid-7-mixed {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .content .image-list-container.grid-7-mixed .image-preview-wrap:nth-of-type(3) {
    grid-column: 1 / 3 !important;
    max-width: 100% !important;
    margin: 0 !important;
  }

  .content .image-list-container.grid-8-mixed {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  /* Mobile: standard 3-column for legacy layouts */
  .content .image-list-container.image-count-3:not(.grid-3-equal):not(.grid-3-mixed),
  .content .image-list-container.image-count-5:not(.grid-5-mixed),
  .content .image-list-container.image-count-6,
  .content .image-list-container.image-count-7:not(.grid-7-mixed),
  .content .image-list-container.image-count-8:not(.grid-8-mixed),
  .content .image-list-container.image-count-9 {
    grid-template-columns: repeat(3, 1fr) !important;
  }
}

.content pre {
  padding: var(--space-3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-panel);
  background: var(--code-background-color);
}

.highlight pre,
.code pre {
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.content > iframe {
  border: none;
  border-radius: var(--radius-media);
}

.content :not(pre) > code {
  padding: 2px 5px;
  border-radius: var(--radius-chip);
  background: var(--code-background-color);
  color: var(--code-color);
  font-size: 0.9em;
  font-weight: 500;
}

.content table tr {
  border-top: 1px solid var(--border-color);
  background: var(--surface-color);
}

.content table tr:nth-child(2n),
.content table tr th {
  background: var(--code-background-color);
}

/* === Blockquote & Expandable: Apple-style card === */
.content blockquote,
.content .tg-expandable,
.content .tgme_widget_message_link_preview:has(.link_preview_site_name) {
  border-left-color: var(--accent-color);
  background: var(--surface-color);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-ambient);
  border: 1px solid var(--border-color);
  border-left-width: 3px;
  transition: box-shadow 200ms var(--ease-out);
}

.content blockquote:hover,
.content .tg-expandable:hover,
.content .tgme_widget_message_link_preview:has(.link_preview_site_name):hover {
  box-shadow: var(--shadow-soft);
}

.content blockquote {
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-5);
  font-size: 0.9em;
  font-style: normal;
  line-height: 1.65;
}

/* === Link Preview: refined === */
.content .tgme_widget_message_link_preview:has(.link_preview_site_name) {
  padding: var(--space-3) var(--space-4);
}

/* === OG Link Card: Apple-style premium card === */
.content .og-link-card {
  margin-top: var(--space-5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-media);
  background: var(--surface-color);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  transition:
    box-shadow 250ms var(--ease-out),
    border-color 250ms var(--ease-out),
    transform 200ms var(--ease-out);
  overflow: hidden;
}

.content .og-link-card:hover {
  text-decoration: none;
  border-color: color-mix(in srgb, var(--accent-color) 12%, var(--border-color));
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.content .og-card-thumb-wrap {
  border-radius: var(--radius-media);
  background: var(--code-background-color);
  overflow: hidden;
}

.content .og-card-thumb {
  border-radius: 0;
  transition: transform 300ms var(--ease-out);
}

.content .og-link-card:hover .og-card-thumb {
  transform: scale(1.03);
}

.content .og-card-site {
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.68em !important;
  font-weight: 600;
  color: var(--muted-color);
}

.content .og-card-title {
  letter-spacing: -0.008em;
  font-weight: 600;
  line-height: 1.3;
}

.content .og-card-description {
  letter-spacing: -0.003em;
  line-height: 1.5;
}

/* === Video & Audio: refined === */
.content video:not(.sticker) {
  border-radius: var(--radius-media);
}

.content audio {
  max-width: 100%;
  margin: 0;
  margin-left: 0;
  margin-right: auto;
  border-radius: var(--radius-media);
}

/* === Spoiler === */
.content .spoiler-button tg-spoiler {
  border-radius: var(--radius-chip);
}

/* === Modal: Apple-style elevated === */
.content .modal-img {
  border-radius: var(--radius-media);
  box-shadow: var(--shadow-modal);
}

/* === Responsive === */
@media (max-width: 37.5rem) {
  .posts-feed {
    margin-left: 0;
  }

  .post-content,
  .post-reactions,
  .post-tags,
  .post-comments {
    padding-left: var(--space-5);
  }

  .post-content {
    padding-top: var(--space-6);
    padding-bottom: var(--space-7);
  }

  /* Mobile: OG card tighter padding */
  .content .og-link-card {
    margin-top: var(--space-4);
  }

  .directory-list {
    columns: 1;
    column-rule: 0;
  }

  /* Mobile: reduce hover effects */
  .content .og-link-card:hover {
    transform: none;
  }

  .content .og-link-card:hover .og-card-thumb {
    transform: none;
  }

  .tags a:hover,
  .reaction:hover,
  .pagination a:hover,
  #back-to-top:hover {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .social-links a,
  .site-navigation a,
  .pagination a,
  .reaction,
  .tags a,
  #back-to-top,
  .og-link-card,
  .channel-avatar,
  .content .image-list-container.image-count-1 .image-preview-wrap img,
  .content video:not(.sticker) {
    transition: none;
  }

  .og-link-card:hover,
  .tags a:hover,
  .reaction:hover,
  .pagination a:hover,
  #back-to-top:hover,
  .channel-avatar:hover,
  .content .image-list-container.image-count-1 .image-preview-wrap img:hover,
  .content video:not(.sticker):hover {
    transform: none;
  }

  a {
    transition: none;
  }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }

  .post-entry:hover .timeline-dot {
    transform: none;
  }
}