/* ============================================================ Minimal Black & White Blog Theme - CSS variables drive light/dark mode (toggled on ) - System font stack + mono accent for a clean technical look ============================================================ */ :root { --bg: #ffffff; --bg-soft: #f6f6f6; --bg-code: #f4f4f4; --text: #111111; --text-soft: #555555; --text-faint: #999999; --border: #e6e6e6; --border-strong: #111111; --link: #111111; --accent: #111111; --selection: #111111; --selection-text: #ffffff; --shadow: 0 1px 2px rgba(0, 0, 0, 0.04); /* global background image + frosted surfaces */ --scrim: rgba(248, 250, 253, 0.42); --surface: rgba(255, 255, 255, 0.82); --surface-border: rgba(255, 255, 255, 0.55); --header-bg: rgba(255, 255, 255, 0.68); --maxw: 720px; --maxw-wide: 1080px; --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace; --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; } html[data-theme="dark"] { --bg: #0e0e0e; --bg-soft: #161616; --bg-code: #1a1a1a; --text: #ededed; --text-soft: #a8a8a8; --text-faint: #6a6a6a; --border: #262626; --border-strong: #ededed; --link: #ffffff; --accent: #ffffff; --selection: #ededed; --selection-text: #0e0e0e; --shadow: none; --scrim: rgba(5, 8, 18, 0.52); --surface: rgba(13, 15, 22, 0.68); --surface-border: rgba(255, 255, 255, 0.10); --header-bg: rgba(10, 12, 18, 0.60); } * { box-sizing: border-box; } html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; } body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.7; letter-spacing: 0.01em; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; transition: background-color 0.25s ease, color 0.25s ease; } /* global night-scene background: a fixed layer (iOS-safe, no background-attachment) topped by a theme-aware scrim for contrast */ body::before { content: ""; position: fixed; inset: 0; z-index: -1; background-image: linear-gradient(var(--scrim), var(--scrim)), url(../../static/img/background.jpg); background-size: cover; background-position: center; transition: background-color 0.25s ease; } /* frosted content sheet that floats above the background image */ .sheet { background: var(--surface); -webkit-backdrop-filter: blur(16px) saturate(140%); backdrop-filter: blur(16px) saturate(140%); border: 1px solid var(--surface-border); border-radius: 16px; padding: 28px 28px 32px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.10); } ::selection { background: var(--selection); color: var(--selection-text); } a { color: var(--link); text-decoration: none; } a:hover { text-decoration: underline; text-underline-offset: 3px; } img { max-width: 100%; height: auto; } hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; } /* ---------- Layout ---------- */ .wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; } .wrap-wide { max-width: var(--maxw-wide); } main { min-height: 70vh; padding: 56px 0 80px; } /* ---------- Header / Nav ---------- */ .site-header { position: sticky; top: 0; z-index: 50; background: var(--header-bg); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid var(--surface-border); } .nav { display: flex; align-items: center; gap: 8px; height: 60px; } .brand { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; margin-right: auto; display: flex; align-items: center; gap: 9px; } .brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); display: inline-block; } .brand:hover { text-decoration: none; } .nav-link { color: var(--text-soft); font-size: 14.5px; padding: 6px 10px; border-radius: 7px; } .nav-link:hover { color: var(--text); background: var(--bg-soft); text-decoration: none; } .nav-link.active { color: var(--text); font-weight: 600; } .theme-toggle { margin-left: 4px; width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--border); border-radius: 9px; background: transparent; color: var(--text); cursor: pointer; transition: border-color 0.2s ease, background 0.2s ease; } .theme-toggle:hover { border-color: var(--border-strong); } .theme-toggle svg { width: 17px; height: 17px; } .theme-toggle .icon-sun { display: none; } html[data-theme="dark"] .theme-toggle .icon-sun { display: block; } html[data-theme="dark"] .theme-toggle .icon-moon { display: none; } .nav-toggle { display: none; width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 9px; background: transparent; color: var(--text); cursor: pointer; align-items: center; justify-content: center; } /* ---------- Hero (home): frosted-glass intro card over the global background ---------- */ .hero-banner { margin: 8px 0; } .hero-banner .hero { margin: 0; padding: 30px 30px 28px; border-radius: 16px; background: rgba(14, 18, 32, 0.45); -webkit-backdrop-filter: blur(14px) saturate(140%); backdrop-filter: blur(14px) saturate(140%); border: 1px solid rgba(255, 255, 255, 0.16); box-shadow: 0 8px 30px rgba(0, 0, 0, 0.22); } /* banner content uses light text regardless of site theme (image is dark) */ .hero-banner .hero h1 { color: #fff; } .hero-banner .hero .lead { color: rgba(255, 255, 255, 0.86); } .hero-banner .hero .avatar { border-color: rgba(255, 255, 255, 0.55); } .hero-banner .hero .chip { color: rgba(255, 255, 255, 0.92); background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.22); } .hero-banner .hero .social-btn { color: #fff; border-color: rgba(255, 255, 255, 0.28); background: rgba(255, 255, 255, 0.08); } .hero-banner .hero .social-btn:hover { border-color: rgba(255, 255, 255, 0.7); background: rgba(255, 255, 255, 0.16); } /* ---------- Hero (home) ---------- */ .hero { padding: 40px 0 8px; } .hero .avatar { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); margin-bottom: 22px; } .hero h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 14px; font-weight: 800; } .hero .lead { font-size: 18px; color: var(--text-soft); margin: 0 0 22px; max-width: 38em; } .hero .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; } .socials { display: flex; gap: 10px; } .social-btn { width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--border); border-radius: 9px; color: var(--text); transition: border-color 0.2s ease, transform 0.2s ease; } .social-btn:hover { border-color: var(--border-strong); transform: translateY(-2px); text-decoration: none; } .social-btn svg { width: 18px; height: 18px; fill: currentColor; } /* ---------- Chips / Tags ---------- */ .chip { display: inline-flex; align-items: center; font-family: var(--mono); font-size: 12px; color: var(--text-soft); background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 3px 11px; line-height: 1.6; cursor: default; } a.chip { cursor: pointer; } a.chip:hover { color: var(--text); border-color: var(--border-strong); text-decoration: none; } .chip.active { background: var(--accent); color: var(--bg); border-color: var(--accent); } /* ---------- Section headings ---------- */ .section-head { display: flex; align-items: baseline; justify-content: space-between; margin: 48px 0 8px; } .section-head h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--text-faint); font-weight: 700; margin: 0; } .section-head a { font-size: 13.5px; color: var(--text-soft); } /* ---------- Post list ---------- */ .post-list { list-style: none; padding: 0; margin: 8px 0 0; } .post-item { padding: 22px 0; border-bottom: 1px solid var(--border); } .post-item:last-child { border-bottom: none; } .post-item a.post-title { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; color: var(--text); display: inline-block; margin-bottom: 6px; } .post-item a.post-title:hover { text-decoration: none; opacity: 0.65; } .post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-family: var(--mono); font-size: 12.5px; color: var(--text-faint); margin-bottom: 8px; } .post-meta .sep { opacity: 0.5; } .post-excerpt { color: var(--text-soft); margin: 4px 0 10px; } .post-item .tags { display: flex; flex-wrap: wrap; gap: 6px; } /* compact list (archive) */ .archive-year { font-family: var(--mono); font-size: 13px; color: var(--text-faint); font-weight: 700; margin: 34px 0 6px; letter-spacing: 0.05em; } .archive-list { list-style: none; padding: 0; margin: 0; } .archive-row { display: flex; gap: 16px; align-items: baseline; padding: 9px 0; border-bottom: 1px solid var(--border); } .archive-row .d { font-family: var(--mono); font-size: 13px; color: var(--text-faint); flex-shrink: 0; width: 52px; } .archive-row a { font-weight: 500; } /* ---------- Search + filter bar ---------- */ .toolbar { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 8px 0 26px; } .search { flex: 1; min-width: 200px; display: flex; align-items: center; gap: 8px; border: 1px solid var(--border); border-radius: 10px; padding: 9px 13px; background: var(--bg-soft); } .search:focus-within { border-color: var(--border-strong); } .search input { flex: 1; border: none; background: transparent; color: var(--text); font-size: 15px; font-family: var(--sans); outline: none; } .search svg { width: 16px; height: 16px; color: var(--text-faint); flex-shrink: 0; } .filter-tags { display: flex; flex-wrap: wrap; gap: 7px; } .empty { color: var(--text-faint); padding: 40px 0; text-align: center; font-family: var(--mono); font-size: 14px; } /* ---------- Article (post page) ---------- */ .article-header { margin-bottom: 12px; } .article-header h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.2; letter-spacing: -0.02em; font-weight: 800; margin: 14px 0 14px; } .article-header .post-meta { font-size: 13px; margin-bottom: 14px; } .back-link { font-family: var(--mono); font-size: 13px; color: var(--text-soft); } .back-link:hover { color: var(--text); } .prose { font-size: 16.5px; line-height: 1.8; min-width: 0; overflow-wrap: break-word; word-wrap: break-word; } .prose > *:first-child { margin-top: 0; } .prose h1, .prose h2, .prose h3, .prose h4 { line-height: 1.3; letter-spacing: -0.01em; scroll-margin-top: 80px; } .prose h1 { font-size: 1.7em; margin: 1.8em 0 0.7em; } .prose h2 { font-size: 1.4em; margin: 1.7em 0 0.6em; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); } .prose h3 { font-size: 1.18em; margin: 1.5em 0 0.5em; } .prose h4 { font-size: 1.02em; margin: 1.4em 0 0.4em; } .prose p { margin: 1em 0; } .prose a { text-decoration: underline; text-underline-offset: 2px; text-decoration-color: var(--text-faint); } .prose a:hover { text-decoration-color: var(--text); } .prose ul, .prose ol { padding-left: 1.4em; margin: 1em 0; } .prose li { margin: 0.35em 0; } .prose blockquote { margin: 1.4em 0; padding: 4px 18px; color: var(--text-soft); border-left: 3px solid var(--border-strong); background: var(--bg-soft); border-radius: 0 8px 8px 0; } .prose blockquote p { margin: 0.6em 0; } .prose img { border-radius: 10px; border: 1px solid var(--border); margin: 1.2em 0; } .prose code { font-family: var(--mono); font-size: 0.88em; background: var(--bg-code); padding: 0.15em 0.4em; border-radius: 5px; border: 1px solid var(--border); } .prose pre { background: var(--bg-code); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; overflow-x: auto; margin: 1.4em 0; font-size: 13.5px; line-height: 1.6; max-width: 100%; } /* code inside pre must NOT wrap (it scrolls); inline code may wrap */ .prose pre code { background: none; border: none; padding: 0; font-size: inherit; white-space: pre; overflow-wrap: normal; } .prose :not(pre) > code { overflow-wrap: break-word; } /* tables can be wide: let them scroll horizontally within the column */ .prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 0.95em; display: block; overflow-x: auto; } .prose th, .prose td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; } .prose th { background: var(--bg-soft); font-weight: 600; } /* Table of contents */ .toc { font-size: 13.5px; line-height: 1.9; } /* give the floating TOC a glass backing so it reads over the page image */ .toc:not(:empty) { background: var(--surface); -webkit-backdrop-filter: blur(16px) saturate(140%); backdrop-filter: blur(16px) saturate(140%); border: 1px solid var(--surface-border); border-radius: 14px; padding: 16px 14px; } .toc-title { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin-bottom: 8px; } .toc ul { list-style: none; padding: 0; margin: 0; } .toc a { color: var(--text-soft); display: block; padding: 2px 0; border-left: 2px solid var(--border); padding-left: 12px; } .toc a:hover { color: var(--text); border-left-color: var(--border-strong); text-decoration: none; } .toc .lvl-3 { padding-left: 26px; } .article-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; } /* grid children default to min-width:auto, which lets wide content (long

,
   tables) blow past the viewport on phones. Force them to be shrinkable. */
.article-layout > * { min-width: 0; }
/* single-column mode (<1080px): hide the side TOC (it would otherwise drop to the
   page bottom) and narrow the container to a comfortable reading measure */
@media (max-width: 1079px) {
  .article-layout .toc-wrap { display: none; }
  .wrap-wide { max-width: var(--maxw); }
}
@media (min-width: 1080px) {
  .article-layout.has-toc { grid-template-columns: minmax(0, 1fr) 220px; gap: 48px; align-items: start; }
  .article-layout .toc-wrap { position: sticky; top: 84px; }
  /* roomier padding for the long-form reading panel */
  .article-layout .sheet { padding: 40px 48px 48px; }
}

.post-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); }
.post-nav a { max-width: 48%; }
.post-nav .dir { font-family: var(--mono); font-size: 12px; color: var(--text-faint); display: block; }
.post-nav .nx { text-align: right; margin-left: auto; }

/* ---------- About ---------- */
.about-block { margin-top: 8px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--surface-border);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  padding: 30px 0;
  color: var(--text-faint);
  font-size: 13px;
  font-family: var(--mono);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; }
.site-footer a { color: var(--text-soft); }
.site-footer a:hover { color: var(--text); }
.footer-links { display: inline-flex; align-items: center; gap: 8px; }
.footer-links .sep { opacity: 0.5; }

/* ---------- Loading ---------- */
.skeleton { color: var(--text-faint); font-family: var(--mono); font-size: 14px; padding: 30px 0; }

/* ---------- Responsive nav ---------- */
@media (max-width: 640px) {
  main { padding: 32px 0 56px; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; top: 60px; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 24px 16px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links .nav-link { padding: 11px 6px; border-radius: 0; }
  .nav { position: relative; }
  /* tighten the hero card and sheets on small screens */
  .hero-banner .hero { padding: 22px 18px 20px; }
  .sheet { padding: 18px 16px 22px; border-radius: 14px; }
}
@media (min-width: 641px) {
  .nav-links { display: flex !important; align-items: center; gap: 4px; }
}

/* ============================================================
   Article enhancements (highlight, copy, progress, top, TOC, lightbox)
   ============================================================ */

/* code block + copy button */
.prose pre { position: relative; }
.prose pre .copy-btn {
  position: absolute; top: 8px; right: 8px;
  font-family: var(--mono); font-size: 11.5px; line-height: 1;
  color: var(--text-soft); background: var(--bg); cursor: pointer;
  border: 1px solid var(--border); border-radius: 7px; padding: 6px 9px;
  opacity: 0; transition: opacity 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.prose pre:hover .copy-btn, .prose pre .copy-btn:focus { opacity: 1; }
.prose pre .copy-btn:hover { color: var(--text); border-color: var(--border-strong); }
.prose pre .copy-btn.copied { color: var(--text); border-color: var(--border-strong); }
@media (hover: none) { .prose pre .copy-btn { opacity: 1; } } /* always show on touch */

/* highlight.js padding reset (theme file sets colors; we keep our own pre padding) */
.prose pre code.hljs { padding: 0; background: none; }

/* reading progress bar */
.read-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--accent); z-index: 60; transition: width 0.1s linear;
}

/* back to top */
.to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 55;
  width: 42px; height: 42px; border-radius: 11px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  cursor: pointer; opacity: 0; transform: translateY(8px); pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.to-top:hover { border-color: var(--border-strong); }
.to-top svg { width: 18px; height: 18px; }

/* TOC active state (scroll-spy) */
.toc a.active { color: var(--text); border-left-color: var(--border-strong); font-weight: 600; }

/* image lightbox */
.prose img.zoomable { cursor: zoom-in; }
.lightbox {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, 0.85); padding: 24px;
  opacity: 0; transition: opacity 0.2s ease; cursor: zoom-out;
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
}
.lightbox.open { opacity: 1; }
.lightbox img {
  max-width: 100%; max-height: 100%; border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transform: scale(0.96); transition: transform 0.2s ease;
}
.lightbox.open img { transform: scale(1); }

/* respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}