/* Blog views are independent of the host shell. Only shared design tokens are required. */
.blog-masthead { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; padding-block: 104px 76px; }
.blog-masthead h1 { font-size: clamp(48px, 6vw, 80px); font-weight: 550; letter-spacing: -.055em; line-height: 1.12; }
.blog-masthead p { margin-top: 25px; max-width: 50ch; font-size: clamp(16px, 1.5vw, 20px); color: var(--muted); line-height: 1.75; }
.blog-feed { margin-right: -20px; white-space: nowrap; color: var(--muted); }
.blog-library { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: clamp(36px, 6vw, 96px); padding-bottom: 100px; align-items: start; }
.blog-sidebar { position: sticky; top: calc(var(--header-height) + 40px); }
.blog-sidebar h2 { color: var(--muted); font-size: 13px; font-weight: 500; margin-bottom: 18px; padding-left: 14px; }
.blog-sidebar nav { display: grid; gap: 5px; }
.blog-sidebar button { display: flex; width: 100%; align-items: center; justify-content: space-between; padding: 10px 14px; gap: 16px; font-size: 14px; text-align: left; color: var(--muted); }
.blog-sidebar button > span:last-child { font-size: 12px; color: var(--muted); }
.blog-sidebar button.blog-subcategory { padding-block: 7px; padding-left: 30px; font-size: 13px; }
.blog-sidebar button[aria-pressed='true'] { background: var(--surface); color: var(--ink); }
.blog-sidebar button[aria-pressed='true']::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.blog-sidebar button[aria-pressed='true'] > span:first-child { margin-right: auto; }
.blog-search { display: grid; gap: 16px; }
html:not(.js) .blog-search, html:not(.js) .blog-sidebar, html:not(.js) .blog-result-heading { display: none; }
html:not(.js) .blog-library { display: block; max-width: 960px; }
.blog-search-input { position: relative; display: block; }
.blog-search-input svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 19px; height: 19px; color: var(--muted); pointer-events: none; }
.blog-search-input input { padding-left: 46px; background: var(--paper); height: 50px; }
.blog-filters { display: flex; gap: 12px; flex-wrap: wrap; }
.blog-filter { display: flex; flex: 1; align-items: center; gap: 10px; min-width: 150px; }
.blog-filter > span { flex-shrink: 0; font-size: 12px; color: var(--muted); }
.blog-filter select { padding: 7px 28px 7px 11px; font-size: 12px; height: 36px; background: var(--paper); border-color: transparent; }
/* Designed dropdown: trigger and option panel follow the Tenon control states. */
.blog-select { position: relative; flex: 1; min-width: 0; }
.blog-select-trigger { display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%; height: 36px; padding: 0 10px 0 12px; border: 1px solid var(--hairline-strong); border-radius: var(--input-radius); background: var(--surface-1); color: var(--ink); font: inherit; font-size: 13px; cursor: pointer; }
.blog-select-value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.blog-select-trigger svg { flex: none; width: 16px; height: 16px; fill: none; stroke: var(--muted); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; transition: transform var(--duration-base) var(--ease); }
.blog-select-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
.blog-select.is-filtered .blog-select-trigger { border-color: color-mix(in srgb, var(--accent) 45%, transparent); background: color-mix(in srgb, var(--accent) 8%, var(--surface-1)); }
@media (hover: hover) { .blog-select-trigger:hover { border-color: var(--quiet); background: var(--surface-2); } }
.blog-select-trigger:focus-visible { outline: var(--focus-width) solid var(--focus-ring); outline-offset: 2px; }
.blog-select-panel { position: absolute; top: calc(100% + 6px); left: 0; z-index: 20; min-width: 100%; max-height: min(320px, 50vh); margin: 0; padding: 6px; overflow-y: auto; list-style: none; border-radius: 12px; background: var(--surface-1); box-shadow: 0 0 0 1px var(--hairline-strong), 0 12px 32px #00000016, 0 2px 6px #00000008; }
:root[data-theme='dark'] .blog-select-panel { box-shadow: 0 0 0 1px var(--hairline-strong), 0 12px 32px #00000066, 0 2px 6px #00000033; }
.blog-select.is-above .blog-select-panel { top: auto; bottom: calc(100% + 6px); }
.blog-select.is-end .blog-select-panel { left: auto; right: 0; }
.blog-select-panel:focus { outline: none; }
.blog-select-panel [role="option"] { position: relative; display: flex; align-items: center; min-height: 34px; padding: 6px 32px 6px 10px; border-radius: 8px; color: var(--text-soft); font-size: 13px; line-height: 1.4; white-space: nowrap; cursor: pointer; }
.blog-select-panel [role="option"].is-active { background: var(--surface-2); color: var(--ink); }
.blog-select-panel [role="option"][aria-selected="true"] { color: var(--ink); font-weight: 600; }
.blog-select-panel [role="option"][aria-selected="true"]::after { content: ''; position: absolute; right: 10px; top: 50%; width: 14px; height: 14px; transform: translateY(-50%); background: var(--accent-text); -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m3.5 8.4 2.9 2.7 6-6.2' fill='none' stroke='%23000' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m3.5 8.4 2.9 2.7 6-6.2' fill='none' stroke='%23000' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat; }
@media (prefers-reduced-motion: reduce) { .blog-select-trigger svg { transition: none; } }
.blog-result-heading { display: flex; justify-content: space-between; align-items: center; min-height: 58px; margin-top: 20px; font-size: 12px; color: var(--muted); }
.blog-result-heading button, .blog-empty button { padding: 8px 12px; font-size: 12px; }
.blog-entry { position: relative; display: grid; grid-template-columns: 112px minmax(0, 1fr) 38px; gap: 24px; align-items: start; padding-block: 34px 38px; border-top: 1px solid var(--line); }
.blog-entry-date { display: grid; gap: 12px; color: var(--muted); font-size: 12px; line-height: 1.6; padding-top: 3px; }
.blog-language { font-size: 11px; color: var(--muted); }
/* Bilingual posts carry every edition at one URL: show the site language, or the reader's pick. */
html[data-language='zh'] [data-blog-editions]:not([data-edition]) [data-blog-edition]:not([data-blog-edition='zh']),
html[data-language='en'] [data-blog-editions]:not([data-edition]) [data-blog-edition]:not([data-blog-edition='en']),
[data-blog-editions][data-edition='zh'] [data-blog-edition]:not([data-blog-edition='zh']),
[data-blog-editions][data-edition='en'] [data-blog-edition]:not([data-blog-edition='en']) { display: none; }
.blog-language-switch { display: inline-flex; gap: 2px; padding: 2px; border: 1px solid var(--line); border-radius: 999px; }
.blog-language-switch button { min-height: 24px; padding: 2px 10px; color: var(--muted); font: inherit; font-size: 11px; line-height: 1; cursor: pointer; }
.blog-language-switch button[aria-pressed='true'] { background: var(--surface); color: var(--ink); }
.blog-entry-topics { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; font-size: 11px; color: var(--accent); line-height: 1.6; }
.blog-entry h2 { margin: 0; font-weight: 550; font-size: clamp(20px, 1.85vw, 26px); line-height: 1.5; letter-spacing: -.025em; text-wrap: pretty; }
.blog-entry h2 a { transition: color 180ms; }
.blog-entry h2 a:hover { color: var(--accent); }
.blog-entry-copy > p { margin-top: 12px; max-width: 64ch; color: var(--muted); font-size: 14px; line-height: 1.85; }
.blog-entry-open { width: 36px; height: 36px; color: var(--muted); margin-top: 23px; }
.blog-entry-open svg { width: 18px; height: 18px; }
.blog-empty { padding: 60px 20px 80px; text-align: center; }
.blog-empty h2 { font-size: 22px; font-weight: 550; }
.blog-empty p { margin-block: 16px 24px; color: var(--muted); font-size: 14px; }
.blog-article-header { padding-block: 48px 64px; }
.blog-back { margin-left: -20px; color: var(--muted); min-height: 44px; }
.blog-back::before { content: '←'; font-size: 18px; }
.blog-article-heading { width: min(800px, 100%); margin: 42px auto 0; }
.blog-article-heading h1 { font-weight: 550; letter-spacing: -.045em; font-size: clamp(32px, 3.4vw, 48px); line-height: 1.4; text-wrap: pretty; }
.blog-article-heading .blog-entry-topics { font-size: 13px; margin-bottom: 22px; gap: 16px; }
.blog-article-heading .blog-entry-topics a:hover { text-decoration: underline; text-underline-offset: 4px; }
.blog-article-summary { margin-top: 25px; font-size: 18px; line-height: 1.9; color: var(--muted); }
.blog-article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px; margin-top: 28px; color: var(--muted); font-size: 12px; }
.blog-reading-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 800px) minmax(0, 1fr); gap: 40px; align-items: start; }
.blog-toc { position: sticky; top: calc(var(--header-height) + 36px); grid-column: 1; font-size: 12px; color: var(--muted); min-width: 0; }
.blog-toc details { margin: 0; padding: 0; }
.blog-toc summary { list-style: none; font-weight: 550; color: var(--ink); margin-bottom: 16px; pointer-events: none; }
.blog-toc summary::-webkit-details-marker { display: none; }
.blog-toc nav { display: grid; gap: 4px; max-height: calc(100svh - 240px); overflow: auto; scrollbar-width: thin; }
.blog-toc nav a { padding-block: 5px; line-height: 1.6; transition: color 160ms; }
.blog-toc nav a:hover, .blog-toc nav a[aria-current] { color: var(--ink); }
.blog-toc nav a[aria-current] { border-left: 2px solid var(--accent); padding-left: 10px; }
.blog-toc nav .toc-level-3 { padding-left: 10px; font-size: 11px; }
.blog-toc:has(nav:empty) details { display: none; }
.blog-source { display: inline-flex; padding-block: 12px; margin-top: 16px; color: var(--muted); font-size: 11px; text-decoration: underline; text-underline-offset: 4px; }
.blog-reading-content { grid-column: 2; min-width: 0; }
.blog-prose { font-size: 17px; line-height: 1.95; overflow-wrap: anywhere; }
.blog-prose > :first-child { margin-top: 0; }
.blog-prose p { margin-block: 1.25em; }
.blog-prose h1, .blog-prose h2, .blog-prose h3, .blog-prose h4, .blog-prose h5, .blog-prose h6 { font-weight: 600; line-height: 1.55; scroll-margin-top: calc(var(--header-height) + 24px); letter-spacing: -.02em; }
.blog-prose h1, .blog-prose h2 { margin-block: 2.4em .8em; font-size: 27px; }
.blog-prose h3 { margin-block: 2em .7em; font-size: 22px; }
.blog-prose h4 { margin-block: 1.6em .5em; font-size: 18px; }
.blog-prose ul, .blog-prose ol { margin-block: 1.2em; padding-left: 1.5em; }
.blog-prose li { padding-left: .2em; margin-block: .45em; }
.blog-prose li > p { margin-block: .5em; }
.blog-prose li > ul, .blog-prose li > ol { margin-block: .5em; }
.blog-prose a { text-decoration: underline; text-decoration-color: var(--quiet); text-underline-offset: 4px; transition: color 160ms; }
.blog-prose a:hover { color: var(--accent); }
.blog-prose strong { font-weight: 650; }
.blog-prose code { padding: .15em .35em; border-radius: 5px; background: var(--surface); font-size: .86em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.blog-prose pre { position: relative; margin-block: 28px; padding: 48px 24px 24px; overflow: auto; background: var(--media); border: 1px solid var(--line); border-radius: 12px; font-size: 13px; line-height: 1.8; tab-size: 2; }
.blog-prose pre code { padding: 0; background: transparent; font-size: inherit; white-space: pre; overflow-wrap: normal; }
.blog-code-copy { position: absolute; right: 10px; top: 8px; font-size: 11px; color: var(--muted); padding: 6px 10px; }
.blog-code-language { position: absolute; left: 24px; top: 14px; font-size: 10px; color: var(--muted); line-height: 1.5; }
.blog-prose blockquote { margin: 28px 0; padding: 4px 24px; border-left: 2px solid var(--accent); color: var(--muted); }
.blog-prose blockquote > :first-child { margin-top: 0; }
.blog-prose blockquote > :last-child { margin-bottom: 0; }
.blog-prose img { max-width: 100%; height: auto; max-height: 840px; object-fit: contain; margin: 32px auto; border-radius: 6px; }
.blog-prose figure { margin: 32px 0; }
.blog-prose figcaption { color: var(--muted); font-size: 12px; text-align: center; }
.blog-table-wrap { overflow-x: auto; margin-block: 28px; }
.blog-prose table { border-collapse: collapse; font-size: 14px; width: 100%; }
html:not(.js) .blog-prose table { display: block; overflow-x: auto; }
.blog-prose th, .blog-prose td { padding: 12px 16px; border: 1px solid var(--line); text-align: left; min-width: 100px; vertical-align: top; }
.blog-prose th { background: var(--media); font-weight: 600; }
.blog-prose hr { border: 0; border-top: 1px solid var(--line); margin-block: 40px; }
.blog-prose .math { overflow-x: auto; overflow-y: hidden; }
.blog-prose div.math { margin-block: 24px; padding-block: 8px; text-align: center; }
.blog-prose span.math { display: inline; }
.blog-prose .katex { font-size: 1.05em; }
.blog-prose .footnotes { margin-top: 48px; font-size: 13px; color: var(--muted); }
.blog-article-end { border-top: 1px solid var(--line); padding-top: 28px; margin-top: 64px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.blog-article-end > p { margin-block: 12px; }
.blog-discussion { margin-top: 30px; }
.blog-discussion h2 { font-size: 15px; font-weight: 550; color: var(--ink); margin-bottom: 10px; }
.blog-discussion .action-slot { margin-left: -20px; }
.blog-related { padding-block: 72px 100px; }
.blog-related > h2 { font-size: 22px; font-weight: 550; margin-bottom: 28px; }
.blog-related > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; }
.blog-related .blog-entry { grid-template-columns: minmax(0, 1fr) 36px; gap: 16px; }
.blog-related .blog-entry-date { display: flex; align-items: center; grid-column: 1 / -1; }
.blog-related .blog-entry h2 { font-size: 21px; }
.blog-related .blog-entry-open { margin-top: 18px; }
#site-navigation a[href='/blog/'][aria-current='page'] { color: var(--ink); }
@media (max-width: 1200px) {
  .blog-reading-layout { grid-template-columns: minmax(140px, 180px) minmax(0, 800px); gap: 36px; }
  .blog-article-heading { margin-right: 0; width: calc(100% - 216px); }
}
@media (max-width: 900px) {
  .blog-library { grid-template-columns: 160px minmax(0, 1fr); gap: 32px; }
  .blog-entry { grid-template-columns: minmax(0, 1fr) 36px; gap: 12px; padding-block: 28px; }
  .blog-entry-date { grid-column: 1 / -1; display: flex; align-items: center; gap: 16px; }
  .blog-entry-open { margin-top: 14px; }
  .blog-filters { gap: 8px; }
  .blog-filter { min-width: 120px; }
  .blog-filter > span { display: none; }
}
@media (max-width: 700px) {
  .blog-masthead { padding-block: 56px 42px; gap: 20px; flex-direction: column; align-items: flex-start; }
  .blog-masthead h1 { font-size: 52px; }
  .blog-masthead p { margin-top: 18px; font-size: 16px; }
  .blog-feed { margin-left: -20px; min-height: 40px; padding-block: 8px; font-size: 12px; }
  .blog-library { display: block; padding-bottom: 64px; }
  .blog-sidebar { position: static; margin-bottom: 28px; }
  .blog-sidebar h2 { display: none; }
  .blog-sidebar nav { display: flex; overflow-x: auto; gap: 8px; padding-bottom: 6px; }
  .blog-sidebar button { width: auto; white-space: nowrap; flex-shrink: 0; padding: 9px 13px; gap: 9px; }
  .blog-sidebar button[aria-pressed='true']::before { display: none; }
  .blog-search-input input { font-size: 16px; }
  .blog-filters { gap: 6px; }
  .blog-filter { min-width: 0; flex: 1; }
  .blog-filter select { width: 100%; padding-left: 8px; padding-right: 16px; }
  .blog-select-panel { max-width: calc(100vw - 32px); }
  .blog-entry h2 { font-size: 21px; }
  .blog-entry-copy > p { font-size: 14px; }
  .blog-article-header { padding-block: 26px 36px; }
  .blog-article-heading { width: 100%; margin-top: 24px; }
  .blog-article-heading h1 { font-size: 30px; }
  .blog-article-summary { font-size: 16px; margin-top: 20px; }
  .blog-article-meta { gap: 10px 16px; font-size: 11px; }
  .blog-reading-layout { display: block; }
  .blog-toc { position: static; margin-bottom: 32px; padding: 18px 20px; background: var(--media); border-radius: 12px; }
  .blog-toc summary { cursor: pointer; pointer-events: auto; }
  .blog-toc nav { max-height: 220px; }
  .blog-toc .blog-source { margin-top: 4px; }
  .blog-prose { font-size: 16px; line-height: 1.95; }
  .blog-prose h2 { font-size: 24px; }
  .blog-prose h3 { font-size: 20px; }
  .blog-prose pre { margin-inline: -8px; padding-inline: 18px; font-size: 12px; }
  .blog-prose .katex { font-size: 1em; }
  .blog-related { padding-block: 48px 64px; }
  .blog-related > div { display: block; }
}
@media (prefers-reduced-motion: no-preference) {
  .blog-masthead, .blog-article-heading { animation: blog-appear 450ms ease-out both; }
  @keyframes blog-appear { from { opacity: 0; } to { opacity: 1; } }
}
@media print {
  .blog-toc, .blog-back, .blog-related, .blog-code-copy, .site-header, .site-footer { display: none; }
  .blog-reading-layout, .blog-reading-content { display: block; width: 100%; }
  .blog-article-heading { width: 100%; }
  .blog-prose { font-size: 11pt; }
}