/* Writing: the post list (/posts) and the post pages (/posts/<slug>). */
.post-page .nav { background: var(--bg); box-shadow: 0 1px 0 var(--line); }
body.post-page::after { z-index: 40; }
.post-page .nav nav > a[aria-current="page"] { color: var(--text); }

.post-wrap { max-width: 680px; margin: 0 auto; padding: 132px 22px 0; }
.post-serif { font-family: "Newsreader", Georgia, "Songti SC", serif; }
:lang(zh) .post-serif { font-family: "Newsreader", Georgia, "Songti SC", "Noto Serif SC", serif; }

/* ---------- List ---------- */
.posts-head h1 { margin: 18px 0 0; font-size: clamp(38px, 6vw, 54px); font-weight: 500; line-height: 1.08; letter-spacing: -.025em; color: var(--text); }
.posts-head p { margin: 16px 0 0; max-width: 520px; font-size: 17px; line-height: 1.6; color: var(--muted); }
.posts-list { margin: 56px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.posts-list li { border-bottom: 1px solid var(--line); }
.posts-list a { display: grid; grid-template-columns: 128px 1fr; gap: 6px 24px; padding: 26px 0; }
.posts-list time { padding-top: 6px; font: 12.5px var(--pixel); letter-spacing: .02em; color: var(--faint); }
.posts-list h2 { margin: 0; font-size: 26px; font-weight: 500; line-height: 1.2; letter-spacing: -.015em; color: var(--text); transition: color .15s; }
.posts-list a:hover h2 { color: var(--accent); }
.posts-list p { grid-column: 2; margin: 0; font-size: 15.5px; line-height: 1.6; color: var(--muted); }

/* ---------- Post ---------- */
.post-meta { margin: 0; font: 12.5px var(--pixel); letter-spacing: .02em; color: var(--faint); }
.post-meta a { color: var(--muted); border-bottom: 1px solid var(--line-2); }
.post-meta a:hover { color: var(--accent); border-color: var(--accent); }
.post h1 { margin: 18px 0 0; font-size: clamp(38px, 6.4vw, 58px); font-weight: 500; line-height: 1.06; letter-spacing: -.025em; color: var(--text); }
.post .post-dek { margin: 20px 0 0; font-size: 21px; line-height: 1.5; color: var(--muted); }
.post-body { margin-top: 48px; font-size: 19px; line-height: 1.7; color: var(--text-2); }
.post-body:lang(zh) { font-size: 17.5px; line-height: 1.85; }
.post-body p, .post-body ul, .post-body ol, .post-body blockquote { margin: 0 0 1.15em; }
.post-body h2 { margin: 2.4em 0 .7em; font-size: 30px; font-weight: 500; line-height: 1.2; letter-spacing: -.015em; color: var(--text); }
.post-body h2 .lv { display: block; margin-bottom: 8px; font: 12px var(--pixel); letter-spacing: .06em; color: var(--accent); }
.post-body a { color: var(--text); border-bottom: 1px solid var(--line-2); }
.post-body a:hover { color: var(--accent); border-color: var(--accent); }
.post-body strong { font-weight: 600; color: var(--text); }
.post-body ul, .post-body ol { padding-left: 1.2em; }
.post-body li + li { margin-top: .35em; }
.post-body blockquote { padding: 4px 0 4px 20px; border-left: 2px solid var(--accent); font-style: italic; color: var(--text); }
.post-body blockquote:lang(zh), .post-body em:lang(zh) { font-style: normal; }
.post-body em:lang(zh) { font-weight: 600; color: var(--text); }
.post-end { margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--line); font-size: 16px; line-height: 1.6; color: var(--muted); }
.post-end .btn { margin-top: 18px; }

/* ---------- Figures: plain HTML, no script ---------- */
.fig { margin: 2em -8px 2.2em; padding: 22px 22px 18px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); font-family: var(--sans); }
.fig figcaption { margin-top: 14px; font-size: 13px; line-height: 1.5; color: var(--faint); }

.shift { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.shift div { padding: 16px; border-radius: 12px; background: var(--bg-alt); }
.shift b { display: block; font: 11px var(--pixel); letter-spacing: .08em; text-transform: uppercase; color: var(--faint); }
.shift p { margin: 8px 0 0; font-size: 16px; line-height: 1.45; color: var(--text); }
.shift small { display: block; margin-top: 8px; font-size: 13px; line-height: 1.45; color: var(--muted); }
.shift .now { background: color-mix(in srgb, var(--accent) 12%, var(--card)); }
.shift .now b { color: var(--accent); }

.post-body .levels { margin: 0; padding: 0; list-style: none; }
.post-body .levels li + li { margin-top: 0; }
.levels li { display: grid; grid-template-columns: 34px 92px 1fr; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.levels li:first-child { border-top: 0; padding-top: 2px; }
.levels .n { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; font: 600 13px var(--sans); color: var(--a-on); background: var(--accent); }
.levels li:nth-child(2) .n { opacity: .78; }
.levels li:nth-child(3) .n { opacity: .56; }
.levels li:nth-child(4) .n { opacity: .36; }
.levels .t { font-size: 16px; font-weight: 600; color: var(--text); }
.levels .d { font-size: 14.5px; line-height: 1.45; color: var(--muted); }
.levels .d em { font-style: normal; color: var(--text-2); }
.levels-axis { display: flex; justify-content: space-between; margin-top: 10px; font: 11px var(--pixel); letter-spacing: .04em; color: var(--faint); }

.loop { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.loop span { padding: 8px 12px; border-radius: 999px; background: var(--bg-alt); font-size: 14px; color: var(--text); }
.loop i { font-style: normal; color: var(--faint); }
.loop + .loop { margin-top: 10px; }

@media (max-width: 640px) {
  .post-wrap { padding-top: 112px; }
  .posts-list a { grid-template-columns: 1fr; }
  .posts-list p { grid-column: 1; }
  .posts-list time { padding-top: 0; }
  .post-body { font-size: 18px; }
  .post-body:lang(zh) { font-size: 17px; }
  .post-body h2 { font-size: 26px; }
  .fig { margin-left: -4px; margin-right: -4px; padding: 18px 16px 14px; }
  .shift { grid-template-columns: 1fr; }
  .levels li { grid-template-columns: 30px 1fr; }
  .levels .d { grid-column: 2; margin-top: -8px; }
}

/* App screens: sample content, rendered from mockup/post-screens/. */
.fig-shot { display: grid; justify-items: center; padding-top: 28px; border-color: transparent; background: var(--bg-alt); }
.fig-shot figcaption { justify-self: stretch; }
.app-shot { display: block; width: 250px; max-width: 74%; height: auto; border-radius: 32px; box-shadow: 0 0 0 1px var(--line), 0 26px 40px -26px rgba(60, 40, 20, .4); }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.pair > div { min-width: 0; }
.pair .app-shot { width: 100%; max-width: 250px; margin: 0 auto; }
.fig-label { display: block; margin: 0 0 10px; font: 11px var(--pixel); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.fig-label.on { color: var(--accent); }

.cc { border-radius: 12px; background: #1c1b1a; color: #e9e5df; overflow: hidden; }
.cc-bar { display: flex; gap: 6px; padding: 11px 12px 6px; }
.cc-bar i { width: 10px; height: 10px; border-radius: 50%; background: #3b3936; }
.cc pre { margin: 0; padding: 6px 14px 18px; font: 12.5px/1.7 var(--code); white-space: pre-wrap; }
.cc-u { color: #a8a199; }
.cc-dot { color: #7cc48a; }
.cc-d { color: #8c867e; text-decoration: line-through; }
.cc-w { font-weight: 700; }
.cc-note { margin: 12px 0 0; font-size: 13.5px; line-height: 1.5; color: var(--muted); }

.kw-row { display: grid; gap: 8px; }
.kw-k { font: 11px var(--pixel); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.kw-row small { font-size: 13.5px; line-height: 1.45; color: var(--muted); }
.kw-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.kw-chips span { padding: 6px 11px; border-radius: 999px; background: var(--bg-alt); font-size: 13.5px; color: var(--text); }
.kw-step { display: flex; align-items: center; gap: 10px; margin: 12px 0; font: 12px var(--pixel); letter-spacing: .02em; color: var(--accent); }
.kw-step::before { content: "↓"; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: color-mix(in srgb, var(--accent) 12%, var(--card)); font: 600 14px var(--sans); }
.kw-page { margin: 0; padding: 14px 16px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--bg); font: 12.5px/1.65 var(--code); color: var(--text-2); white-space: pre-wrap; }
.kw-page b { font-weight: 600; color: var(--text); }
.kw-page i { font-style: normal; color: var(--accent); }
.kw-page.small { color: var(--muted); }

.curve { display: block; width: 100%; height: auto; }
.curve .c-ax { stroke: var(--line-2); stroke-width: 1; fill: none; }
.curve .c-no { stroke: var(--faint); stroke-width: 2; stroke-dasharray: 5 5; fill: none; }
.curve .c-rev { stroke: var(--accent); stroke-width: 2.5; fill: none; stroke-linejoin: round; }
.curve .c-pt { fill: var(--accent); }
.curve text { fill: var(--faint); font: 13px var(--pixel); }
.curve-key { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 10px; font-size: 13.5px; color: var(--text-2); }
.curve-key i { display: inline-block; width: 18px; height: 0; margin-right: 8px; vertical-align: middle; border-top: 2.5px solid var(--accent); }
.curve-key i.c-no { border-top: 2px dashed var(--faint); }

@media (max-width: 640px) {
  .pair { grid-template-columns: 1fr; gap: 22px; }
  .pair .app-shot { max-width: 74%; }
}

.post-photo { margin: 0 0 2em; }
.post-photo img { display: block; width: 100%; height: auto; border-radius: 16px; }
.post-photo figcaption { margin-top: 10px; font: 13px/1.5 var(--sans); color: var(--faint); }