/* Blog (/blogpost/): post lists, the article layout and the live editor demos.
   Builds on pages.css (main.lx); everything here is scoped to main.blog. */

/* Lists */
main.blog .blog-card .lx-num {
  font-size: 14px;
  line-height: 1.5;
}

main.blog .blog-card h2 a {
  color: inherit;
  text-decoration: none;
}

main.blog .blog-card h2 a:hover {
  color: var(--lx-blue);
}

main.blog .blog-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

main.blog .blog-years a {
  padding: 6px 14px;
  border: 1px solid var(--lx-line);
  border-radius: 999px;
  color: var(--lx-soft);
  font-size: 15px;
  font-weight: 550;
  text-decoration: none;
}

main.blog .blog-years a[aria-current="page"] {
  border-color: var(--lx-ink);
  background: var(--lx-ink);
  color: #fff;
}

main.blog .blog-feed {
  margin-top: 28px;
}

/* Article */
main.blog .blog-post-hero {
  max-width: 860px;
}

main.blog .blog-post-hero .lx-label a {
  color: inherit;
}

main.blog .blog-post-hero h1 {
  font-size: clamp(36px, 5.4vw, 64px);
}

main.blog .blog-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 720px);
  gap: clamp(28px, 5vw, 72px);
  justify-content: center;
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--lx-line);
}

main.blog .blog-layout.no-toc {
  grid-template-columns: minmax(0, 720px);
}

main.blog .blog-toc {
  position: sticky;
  top: 96px;
  display: grid;
  align-self: start;
  gap: 2px;
  font-size: 14px;
}

main.blog .blog-toc p {
  margin-bottom: 8px;
  color: var(--lx-faint);
  font-size: 13px;
  font-weight: 600;
}

main.blog .blog-toc a {
  padding: 5px 0;
  color: var(--lx-soft);
  line-height: 1.35;
  text-decoration: none;
}

main.blog .blog-toc a:hover {
  color: var(--lx-ink);
}

main.blog .blog-prose {
  min-width: 0;
  color: #2b2f38;
  font-size: 18px;
  line-height: 1.68;
}

main.blog .blog-prose > * + * {
  margin-top: 1.1em;
}

main.blog .blog-prose h2 {
  margin-top: 2.2em;
  color: var(--lx-ink);
  font-size: clamp(25px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  scroll-margin-top: 90px;
}

main.blog .blog-prose h3 {
  margin-top: 1.8em;
  color: var(--lx-ink);
  font-size: 21px;
  letter-spacing: -0.02em;
}

main.blog .blog-prose ul,
main.blog .blog-prose ol {
  padding-left: 1.3em;
}

main.blog .blog-prose li + li {
  margin-top: 0.35em;
}

main.blog .blog-prose a {
  color: var(--lx-blue);
  text-underline-offset: 0.18em;
}

main.blog .blog-prose strong {
  color: var(--lx-ink);
  font-weight: 650;
}

main.blog .blog-prose :not(pre) > code {
  padding: 0.1em 0.35em;
  border-radius: 6px;
  background: #eef1f6;
  color: var(--lx-ink);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86em;
}

main.blog .blog-prose blockquote {
  margin-left: 0;
  padding-left: 20px;
  border-left: 3px solid var(--lx-line);
  color: var(--lx-soft);
}

main.blog .blog-prose .lx-table-wrap {
  font-size: 16px;
}

main.blog .blog-post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 992px;
  margin: clamp(48px, 7vw, 90px) auto 0;
}

main.blog .blog-post-nav a {
  display: grid;
  gap: 4px;
  padding: 20px 22px;
  border: 1px solid var(--lx-line);
  border-radius: 16px;
  color: var(--lx-ink);
  font-weight: 600;
  text-decoration: none;
}

main.blog .blog-post-nav a.newer {
  text-align: right;
}

main.blog .blog-post-nav span {
  color: var(--lx-soft);
  font-size: 14px;
  font-weight: 500;
}

@media (max-width: 900px) {
  main.blog .blog-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  main.blog .blog-toc {
    display: none;
  }
}

@media (max-width: 560px) {
  main.blog .blog-prose {
    font-size: 17px;
  }

  main.blog .blog-post-nav {
    grid-template-columns: 1fr;
  }

  main.blog .blog-post-nav a.newer {
    text-align: left;
  }
}

/* Live demos: a LatexDo window drawn in HTML at a fixed design width and
   scaled to fit, played by blog-demos.js. Colours are the desktop app's
   light tokens (src/styles/tokens.css in the latexdo repository). */
main.blog .blog-demo {
  margin: 2em 0;
}

main.blog .blog-prose > .blog-demo {
  margin-top: 1.6em;
}

.ldx-frame {
  position: relative;
  overflow: hidden;
  min-height: 120px;
  border-radius: 14px;
  box-shadow: 0 24px 60px rgb(15 23 42 / 14%), 0 2px 6px rgb(15 23 42 / 6%);
}

.ldx {
  --w: #f3f6fb;
  --canvas: #ffffff;
  --raised: #f8fafc;
  --hover: #eef3f8;
  --chrome: #f6f8fc;
  --text: #1f2937;
  --text-2: #374151;
  --text-3: #667085;
  --text-4: #7b8493;
  --sep: #d7dee8;
  --sep-2: #e6eaf1;
  --sel: #c9dcfa;
  --line: #f1f5fb;
  --accent: #2f6fdb;
  --accent-soft: rgb(47 111 219 / 14%);
  --err: #b42318;
  --err-soft: rgb(180 35 24 / 9%);
  --ok: #177245;
  --ok-soft: rgb(23 114 69 / 11%);
  --kw: #2156c9;
  --math: #a3560c;
  --cmt: #8b95a5;
  --gutter: #a0a8b4;
  --mono: "SFMono-Regular", "Cascadia Code", ui-monospace, Menlo, Consolas, monospace;

  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid rgb(15 23 42 / 14%);
  border-radius: 14px;
  background: var(--w);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  font-size: 12px;
  letter-spacing: 0;
  line-height: 1.45;
  transform-origin: 0 0;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

.ldx-titlebar {
  display: flex;
  flex: none;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 12px;
  border-bottom: 1px solid var(--sep);
  background: var(--chrome);
}

.ldx-titlebar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff5f57;
}

.ldx-titlebar i:nth-child(2) {
  background: #febc2e;
}

.ldx-titlebar i:nth-child(3) {
  background: #28c840;
}

.ldx-titlebar span {
  flex: 1;
  margin-right: 50px;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 600;
  text-align: center;
}

.ldx-body {
  display: grid;
  flex: 1;
  min-height: 0;
  grid-template-columns: minmax(0, 1fr);
}

.ldx.has-chat .ldx-body {
  grid-template-columns: minmax(0, 1fr) 290px;
}

.ldx.is-narrow.has-chat .ldx-body {
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: 230px minmax(0, 1fr);
}

/* Editor */
.ldx-editor {
  position: relative;
  display: flex;
  min-height: 0;
  flex-direction: column;
  background: var(--canvas);
}

.ldx-tabs {
  display: flex;
  flex: none;
  height: 30px;
  border-bottom: 1px solid var(--sep-2);
  background: var(--raised);
}

.ldx-tabs span {
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-right: 1px solid var(--sep-2);
  color: var(--text-4);
}

.ldx-tabs .is-active {
  background: var(--canvas);
  box-shadow: inset 0 2px 0 var(--accent);
  color: var(--text);
  font-weight: 600;
}

.ldx-code {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  padding: 10px 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 21px;
}

.ldx-line {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  padding-right: 14px;
}

.ldx-line.is-current {
  background: var(--line);
}

.ldx-line.is-flash {
  animation: ldx-flash 1.6s ease-out;
}

@keyframes ldx-flash {
  0%,
  30% {
    background: var(--ok-soft);
  }

  100% {
    background: transparent;
  }
}

.ldx-gutter {
  padding-right: 14px;
  color: var(--gutter);
  text-align: right;
}

.ldx-src {
  min-height: 21px;
  color: var(--text-2);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.ldx .t-kw {
  color: var(--kw);
}

.ldx .t-math {
  color: var(--math);
}

.ldx .t-cmt {
  color: var(--cmt);
  font-style: italic;
}

.ldx-caret {
  display: inline-block;
  width: 1.5px;
  height: 16px;
  margin: 0 -0.75px;
  background: var(--text);
  vertical-align: -3px;
  animation: ldx-blink 1.05s steps(1) infinite;
}

.ldx.is-paused .ldx-caret {
  animation: none;
}

@keyframes ldx-blink {
  50% {
    opacity: 0;
  }
}

.ldx-ghost {
  position: relative;
  color: #9aa3b2;
  font-style: italic;
  animation: ldx-fade 260ms ease-out;
}

.ldx-hint {
  position: absolute;
  top: 22px;
  left: 0;
  padding: 2px 7px;
  border: 1px solid var(--sep);
  border-radius: 5px;
  background: var(--canvas);
  box-shadow: 0 4px 12px rgb(15 23 42 / 10%);
  color: var(--text-3);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 10.5px;
  font-style: normal;
  white-space: nowrap;
}

.ldx-sel {
  --sel: 0;
  background: linear-gradient(var(--sel-color, #c9dcfa), var(--sel-color, #c9dcfa)) no-repeat;
  background-size: calc(var(--sel) * 100%) 100%;
}

.ldx-squiggle {
  text-decoration: underline wavy var(--err);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.ldx-status {
  display: flex;
  flex: none;
  align-items: center;
  gap: 7px;
  height: 26px;
  overflow: hidden;
  padding: 0 12px;
  border-top: 1px solid var(--sep-2);
  background: var(--raised);
  color: var(--text-3);
  font-size: 11px;
  white-space: nowrap;
}

.ldx-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
}

.ldx-status[data-kind="error"] {
  background: var(--err-soft);
  color: var(--err);
}

.ldx-status[data-kind="error"] .ldx-dot {
  background: var(--err);
}

.ldx-status[data-kind="busy"] .ldx-dot {
  background: var(--accent);
  animation: ldx-blink 0.7s steps(1) infinite;
}

/* AI chat */
.ldx-chat {
  position: relative;
  display: flex;
  min-height: 0;
  flex-direction: column;
  border-left: 1px solid var(--sep);
  background: var(--raised);
}

.ldx.is-narrow .ldx-chat {
  border-top: 1px solid var(--sep);
  border-left: 0;
}

.ldx-chat-head {
  display: flex;
  flex: none;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 12px;
  border-bottom: 1px solid var(--sep-2);
  font-weight: 650;
}

.ldx-ai-badge {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 6px;
  background: linear-gradient(135deg, #2f6fdb, #7c4dff);
  color: #fff;
  font-size: 9.5px;
  font-weight: 800;
}

.ldx-model {
  margin-left: auto;
  padding: 2px 8px;
  border: 1px solid var(--sep);
  border-radius: 999px;
  color: var(--text-3);
  font-size: 10.5px;
  font-weight: 500;
}

.ldx-thread {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
}

.ldx-greeting {
  margin: auto;
  color: var(--text);
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.ldx-msg {
  color: var(--text-2);
  line-height: 1.5;
  white-space: pre-wrap;
  animation: ldx-fade 220ms ease-out;
}

.ldx-msg.is-user {
  align-self: flex-end;
  max-width: 88%;
  padding: 7px 11px;
  border-radius: 14px 14px 4px 14px;
  background: var(--accent-soft);
  color: var(--text);
}

.ldx-working {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-style: italic;
}

.ldx-spinner {
  width: 11px;
  height: 11px;
  border: 2px solid var(--sep);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: ldx-spin 0.8s linear infinite;
}

@keyframes ldx-spin {
  to {
    transform: rotate(1turn);
  }
}

@keyframes ldx-fade {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

.ldx-codeblock {
  margin: 6px 0;
  padding: 8px 10px;
  overflow: hidden;
  border-radius: 8px;
  background: #0f141c;
  color: #dde3ee;
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.5;
  white-space: pre;
}

.ldx-insert,
.ldx-approval-actions button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border: 1px solid var(--sep);
  border-radius: 7px;
  background: var(--canvas);
  color: var(--text-2);
  font: inherit;
  font-size: 11.5px;
  font-weight: 600;
}

.ldx svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentcolor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.ldx-approval {
  display: grid;
  gap: 6px;
  padding: 10px;
  border: 1px solid var(--sep);
  border-radius: 10px;
  background: var(--canvas);
  box-shadow: 0 6px 18px rgb(15 23 42 / 8%);
  animation: ldx-fade 240ms ease-out;
  transition: opacity 200ms, transform 200ms;
}

.ldx-approval.is-done {
  opacity: 0;
  transform: scale(0.97);
}

.ldx-approval-head {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  font-weight: 650;
}

.ldx-approval-head svg {
  color: var(--accent);
}

.ldx-diff {
  margin: 0;
  padding: 5px 8px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  white-space: pre-wrap;
}

.ldx-diff.is-old {
  background: var(--err-soft);
  color: var(--err);
  text-decoration: line-through;
  text-decoration-color: rgb(180 35 24 / 45%);
}

.ldx-diff.is-new {
  background: var(--ok-soft);
  color: var(--ok);
}

.ldx-approval-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

.ldx-approval-actions .is-approve {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.ldx-composer {
  display: flex;
  flex: none;
  align-items: center;
  gap: 4px;
  margin: 0 10px 10px;
  padding: 5px;
  border: 1px solid var(--sep);
  border-radius: 999px;
  background: var(--canvas);
  transition: border-color 160ms, box-shadow 160ms;
}

.ldx-composer.is-focused {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.ldx-input {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  padding: 0 4px;
  color: var(--text);
  white-space: nowrap;
  direction: rtl;
  text-align: left;
}

.ldx-input > * {
  direction: ltr;
  unicode-bidi: isolate;
}

.ldx-placeholder {
  color: var(--text-4);
}

.ldx-round {
  display: grid;
  flex: none;
  width: 26px;
  height: 26px;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--text-3);
}

.ldx-send {
  background: var(--text);
  color: #fff;
}

.ldx-cmd,
.ldx-mention {
  padding: 0 3px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.ldx-popup {
  position: absolute;
  right: 10px;
  bottom: 52px;
  left: 10px;
  z-index: 2;
  padding: 5px;
  border: 1px solid var(--sep);
  border-radius: 10px;
  background: var(--canvas);
  box-shadow: 0 12px 30px rgb(15 23 42 / 16%);
  animation: ldx-fade 160ms ease-out;
}

.ldx-popup[hidden],
.ldx-popup-item[hidden] {
  display: none;
}

.ldx-popup-title {
  padding: 3px 7px 5px;
  color: var(--text-4);
  font-size: 10.5px;
  font-weight: 600;
}

.ldx-popup-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 7px;
  border-radius: 6px;
}

.ldx-popup-item b {
  font-family: var(--mono);
  font-weight: 600;
}

.ldx-popup-item span {
  color: var(--text-3);
  font-size: 11px;
}

.ldx-popup-item.is-active {
  background: var(--accent-soft);
}

/* Context menu, keycap and PDF preview */
.ldx-menu {
  position: absolute;
  z-index: 3;
  width: 220px;
  padding: 5px;
  border: 1px solid rgb(15 23 42 / 14%);
  border-radius: 9px;
  background: rgb(255 255 255 / 96%);
  box-shadow: 0 16px 40px rgb(15 23 42 / 20%);
  animation: ldx-fade 120ms ease-out;
}

.ldx-menu div {
  display: flex;
  justify-content: space-between;
  padding: 4px 9px;
  border-radius: 5px;
}

.ldx-menu div.is-hover {
  background: var(--accent);
  color: #fff;
}

.ldx-menu kbd {
  color: inherit;
  font-family: inherit;
  opacity: 0.6;
}

.ldx-menu hr {
  margin: 4px 6px;
  border: 0;
  border-top: 1px solid var(--sep-2);
}

.ldx-key {
  position: absolute;
  bottom: 44px;
  left: 50%;
  z-index: 4;
  min-width: 56px;
  padding: 8px 14px;
  border: 1px solid #c4ccd8;
  border-radius: 9px;
  background: linear-gradient(#fff, #f1f4f8);
  box-shadow: 0 4px 0 #c4ccd8, 0 12px 26px rgb(15 23 42 / 18%);
  color: var(--text);
  font-size: 15px;
  font-weight: 650;
  text-align: center;
  transform: translateX(-50%);
  transition: transform 90ms, box-shadow 90ms;
}

.ldx-key.is-down {
  box-shadow: 0 1px 0 #c4ccd8, 0 6px 14px rgb(15 23 42 / 14%);
  transform: translate(-50%, 3px);
}

.ldx-pdf {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 0 16px 16px;
  background: #e9edf3;
  animation: ldx-slide 360ms cubic-bezier(0.2, 0.7, 0.1, 1);
}

@keyframes ldx-slide {
  from {
    opacity: 0;
    transform: translateX(24px);
  }
}

.ldx-pdf-head {
  align-self: stretch;
  height: 36px;
  margin: 0 -16px;
  padding: 0 12px;
  border-bottom: 1px solid var(--sep);
  background: var(--raised);
  color: var(--text);
  font-weight: 650;
  line-height: 36px;
}

.ldx-pdf-page {
  display: grid;
  gap: 9px;
  width: 100%;
  max-width: 250px;
  padding: 20px 18px;
  background: #fff;
  box-shadow: 0 1px 3px rgb(15 23 42 / 14%);
  color: #111;
  font-family: "Latin Modern Roman", "CMU Serif", Georgia, serif;
}

.ldx-pdf-h {
  margin: 0;
  font-size: 11.5px;
  font-weight: 700;
}

.ldx-pdf-p {
  margin: 0;
  font-size: 10px;
  line-height: 1.45;
}

.ldx .ldx-pdf-fig {
  width: 100%;
  height: auto;
  margin: 4px 0;
}

.ldx-pdf-fig rect {
  fill: #fff;
  stroke: #111;
  stroke-width: 1;
}

.ldx-pdf-fig text {
  fill: #111;
  stroke: none;
  font-family: inherit;
  font-size: 9px;
  text-anchor: middle;
}

.ldx-pdf-fig path {
  fill: none;
  stroke: #111;
  stroke-width: 1;
  stroke-dasharray: 30;
  animation: ldx-draw 900ms ease-out both 200ms;
}

@keyframes ldx-draw {
  from {
    stroke-dashoffset: 30;
  }

  to {
    stroke-dashoffset: 0;
  }
}

/* The pointer */
.ldx-pointer {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  width: 20px;
  height: 24px;
  margin: -2px 0 0 -2px;
  pointer-events: none;
  filter: drop-shadow(0 2px 3px rgb(0 0 0 / 28%));
  will-change: transform;
}

.ldx-pointer svg {
  width: 20px;
  height: 24px;
  fill: #111;
  stroke: #fff;
  stroke-width: 1.4;
  transition: transform 110ms ease-out;
  transform-origin: 2px 2px;
}

.ldx-pointer.is-down svg {
  transform: scale(0.86);
}

.ldx-ripple {
  position: absolute;
  z-index: 9;
  width: 30px;
  height: 30px;
  margin: -15px 0 0 -15px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  pointer-events: none;
  animation: ldx-ripple 420ms ease-out forwards;
}

.ldx-ripple.is-right {
  border-color: #7c4dff;
}

@keyframes ldx-ripple {
  from {
    opacity: 0.9;
    transform: scale(0.3);
  }

  to {
    opacity: 0;
    transform: scale(1.25);
  }
}

/* Caption and controls under each demo */
.blog-demo-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  margin-top: 14px;
}

.blog-demo-caption {
  min-height: 1.5em;
  color: var(--lx-soft);
  font-size: 15.5px;
  line-height: 1.5;
}

.blog-demo-controls {
  display: flex;
  gap: 8px;
}

.blog-demo-controls button {
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--lx-line);
  border-radius: 999px;
  background: #fff;
  color: var(--lx-ink);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}

.blog-demo-controls button:hover:not(:disabled) {
  border-color: var(--lx-ink);
}

.blog-demo-controls button:disabled {
  color: var(--lx-faint);
  cursor: default;
}

.blog-demo-controls button:focus-visible {
  outline: 2px solid var(--lx-blue);
  outline-offset: 2px;
}