:root {
  color-scheme: dark;
  --page: #0b1210;
  --panel: #0f1a14;
  --panel-hover: #152119;
  --text: #e6edf3;
  --text-soft: #b7c0ca;
  --muted: #8b949e;
  --line: #1e3428;
  --accent: #7ee787;
  --success: #7ee787;
  --danger: #ff7b72;
  --header-height: 64px;
  --sidebar-width: 300px;
  --reader-width: 760px;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--page); scroll-behavior: smooth; }
body { min-height: 100vh; margin: 0; background: var(--page); color: var(--text); font-family: var(--sans); line-height: 1.75; -webkit-font-smoothing: antialiased; }
button, input { color: inherit; font: inherit; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.eyebrow { margin: 0; color: var(--accent); font-family: var(--mono); font-size: 11px; letter-spacing: .16em; line-height: 1.4; text-transform: uppercase; }

.blog-header { position: fixed; inset: 0 0 auto 0; z-index: 30; display: flex; align-items: center; justify-content: space-between; height: var(--header-height); padding: 0 24px; border-bottom: 1px solid var(--line); background: rgba(11, 18, 16, .92); backdrop-filter: blur(18px); }
.blog-brand { display: inline-flex; align-items: center; gap: 11px; }
.blog-brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 9px; color: var(--success); font-family: var(--mono); font-size: 14px; }
.blog-brand-copy { display: grid; line-height: 1.1; }
.blog-brand-copy strong { font-size: 14px; letter-spacing: -.01em; }
.blog-brand-copy small { margin-top: 4px; color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .14em; }
.blog-header-nav { display: flex; align-items: center; gap: 22px; color: var(--muted); font-family: var(--mono); font-size: 11px; }
.blog-header-nav a:hover, .blog-header-nav a:focus-visible { color: var(--accent); }
.sidebar-toggle { display: none; align-items: center; gap: 7px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); cursor: pointer; }

.article-sidebar { position: fixed; inset: var(--header-height) auto 0 0; z-index: 20; width: var(--sidebar-width); padding: 28px 18px 20px; overflow-y: auto; border-right: 1px solid var(--line); background: var(--panel); scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
.sidebar-heading { display: flex; align-items: end; justify-content: space-between; padding: 0 6px 18px; }
.sidebar-heading h2 { margin: 5px 0 0; font-size: 24px; line-height: 1.2; letter-spacing: -.04em; }
.article-count { color: var(--muted); font-family: var(--mono); font-size: 12px; }
.article-search { display: flex; align-items: center; gap: 9px; min-height: 42px; padding: 0 11px; border: 1px solid var(--line); border-radius: 8px; background: var(--page); color: var(--muted); }
.article-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(126, 231, 135, .12); }
.article-search input { min-width: 0; flex: 1; border: 0; outline: 0; background: transparent; font-size: 13px; }
.article-search input::placeholder { color: #3d5c4a; }
.article-search kbd { padding: 1px 5px; border: 1px solid var(--line); border-radius: 4px; font: 10px var(--mono); }
.article-navigation { display: grid; gap: 24px; padding: 28px 0 70px; }
.article-year-group h3 { padding: 0 9px; margin: 0 0 7px; color: #3d5c4a; font: 10px var(--mono); letter-spacing: .12em; }
.article-year-links { display: grid; gap: 3px; }
.article-nav-link { position: relative; display: grid; gap: 4px; padding: 10px 11px; border-radius: 7px; color: var(--text-soft); transition: background 140ms ease, color 140ms ease; }
.article-nav-link::before { position: absolute; inset: 10px auto 10px 0; width: 2px; border-radius: 2px; background: transparent; content: ""; }
.article-nav-link:hover { background: var(--panel-hover); color: var(--text); }
.article-nav-link[aria-current="page"] { background: rgba(126, 231, 135, .09); color: var(--text); }
.article-nav-link[aria-current="page"]::before { background: var(--accent); }
.article-nav-title { overflow: hidden; font-size: 13px; font-weight: 600; line-height: 1.45; text-overflow: ellipsis; white-space: nowrap; }
.article-nav-link[aria-current="page"] .article-nav-title { font-weight: 700; }
.article-nav-link time { color: var(--muted); font: 10px var(--mono); }
.sidebar-state { padding: 24px 9px; color: var(--muted); font: 11px/1.6 var(--mono); }
.sidebar-skeleton { display: grid; gap: 9px; }
.sidebar-skeleton i { display: block; height: 9px; border-radius: 4px; background: linear-gradient(90deg, var(--line), var(--panel-hover), var(--line)); background-size: 200% 100%; animation: skeleton-shift 1.2s linear infinite; }
.sidebar-skeleton i:nth-child(2) { width: 78%; }
.sidebar-skeleton i:nth-child(3) { width: 62%; }
.sidebar-footer { position: absolute; inset: auto 24px 16px 24px; display: flex; justify-content: space-between; color: #3d5c4a; font: 9px var(--mono); letter-spacing: .08em; }

.reader-main { min-height: 100vh; padding: calc(var(--header-height) + 68px) 48px 90px; margin-left: var(--sidebar-width); background: radial-gradient(circle at 85% 10%, rgba(126, 231, 135, .055), transparent 28rem), var(--page); }
.reader-content, .reader-state { width: min(100%, var(--reader-width)); margin: 0 auto; }
.reader-state { display: flex; align-items: center; gap: 10px; min-height: 50vh; color: var(--muted); font: 12px var(--mono); }
.reader-state button, .reader-end button { padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); cursor: pointer; }
.reader-state button:hover, .reader-end button:hover { border-color: var(--accent); color: var(--accent); }
.reader-state.is-error { color: var(--danger); }
.state-pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 5px rgba(126, 231, 135, .08); }
.reader-article-header { padding-bottom: 42px; border-bottom: 1px solid var(--line); }
.reader-article-header h1 { max-width: 16ch; margin: 15px 0 20px; font-size: clamp(2.7rem, 6vw, 5rem); line-height: 1.06; letter-spacing: -.055em; }
.reader-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; color: var(--muted); font: 11px var(--mono); }
.reader-meta-item { margin: 0; color: var(--muted); }
.reader-tag { color: var(--success); }
.reader-excerpt { max-width: 48rem; margin: 30px 0 0; color: var(--text-soft); font-size: clamp(1.05rem, 2vw, 1.22rem); line-height: 1.8; }
.article-body { padding-top: 42px; color: var(--text-soft); font-size: 16px; line-height: 1.85; }
.article-body p { margin: 0 0 1.3em; }
.article-body h1, .article-body h2, .article-body h3, .article-body h4, .article-body h5, .article-body h6 { margin: 1.8em 0 .7em; color: var(--text); line-height: 1.3; letter-spacing: -.025em; scroll-margin-top: 82px; }
.article-body h2 { padding-bottom: .35em; border-bottom: 1px solid var(--line); font-size: 1.65rem; }
.article-body h3 { font-size: 1.3rem; }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-body img { display: block; max-width: 100%; height: auto; margin: 2em auto; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.article-body img.is-broken { min-height: 80px; }
.article-body figure { margin: 2em 0; }
.article-body figure img { margin-bottom: 0; }
.article-body figcaption { padding-top: 9px; color: var(--muted); font: 10px var(--mono); text-align: center; }
.article-body blockquote { padding: 4px 0 4px 20px; margin: 1.6em 0; border-left: 3px solid var(--accent); color: var(--text-soft); }
.article-body pre { max-width: 100%; padding: 20px; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: #070c0a; color: #d8e2ec; font: 13px/1.7 var(--mono); }
.article-body :not(pre) > code { padding: 2px 5px; border: 1px solid var(--line); border-radius: 4px; background: var(--panel); color: #ffab70; font-family: var(--mono); font-size: .9em; }
.article-body table { display: block; width: 100%; margin: 1.7em 0; overflow-x: auto; border-collapse: collapse; }
.article-body th, .article-body td { padding: 9px 12px; border: 1px solid var(--line); text-align: left; }
.article-body th { background: var(--panel); color: var(--text); }
.article-body hr { margin: 3em 0; border: 0; border-top: 1px solid var(--line); }
.reader-end { display: flex; justify-content: space-between; gap: 20px; padding-top: 24px; margin-top: 70px; border-top: 1px solid var(--line); color: var(--muted); font: 10px var(--mono); letter-spacing: .1em; }
.sidebar-backdrop { display: none; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@keyframes skeleton-shift { to { background-position: -200% 0; } }

/* Reading note specific: use same article link classes as blog.css for consistency */
.article-link { position: relative; display: grid; gap: 4px; padding: 10px 11px; border-radius: 7px; color: var(--text-soft); transition: background 140ms ease, color 140ms ease; text-decoration: none; }
.article-link::before { position: absolute; inset: 10px auto 10px 0; width: 2px; border-radius: 2px; background: transparent; content: ""; }
.article-link:hover { background: var(--panel-hover); color: var(--text); }
.article-link.is-active { background: rgba(126, 231, 135, .09); color: var(--text); }
.article-link.is-active::before { background: var(--accent); }
.article-link-title { overflow: hidden; font-size: 13px; font-weight: 600; line-height: 1.45; text-overflow: ellipsis; white-space: nowrap; }
.article-link.is-active .article-link-title { font-weight: 700; }
.article-link time { color: var(--muted); font: 10px var(--mono); }

@media (max-width: 800px) {
  .blog-header { padding-inline: 16px; }
  .blog-header-nav > a { display: none; }
  .sidebar-toggle { display: inline-flex; }
  .article-sidebar { inset: 0 auto 0 0; z-index: 50; width: min(86vw, 320px); padding-top: 30px; visibility: hidden; transform: translateX(-102%); box-shadow: 22px 0 70px rgba(0, 0, 0, .45); transition: transform 180ms ease; }
  .is-sidebar-open { overflow: hidden; }
  .is-sidebar-open .article-sidebar { visibility: visible; transform: translateX(0); }
  .sidebar-backdrop { position: fixed; inset: 0; z-index: 45; display: block; visibility: hidden; border: 0; background: rgba(0, 0, 0, .62); opacity: 0; transition: opacity 180ms ease, visibility 180ms ease; }
  .is-sidebar-open .sidebar-backdrop { visibility: visible; opacity: 1; }
  .reader-main { padding: calc(var(--header-height) + 48px) 22px 72px; margin-left: 0; }
  .reader-article-header h1 { font-size: clamp(2.35rem, 13vw, 4rem); }
  .article-body { font-size: 15px; }
  .reader-end { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .reader-main { padding-inline: 18px; }
  .reader-meta { gap: 7px 11px; }
  .reader-end { align-items: flex-start; flex-direction: column; }
}