/* === reset & base === */
:root {
  --bg: #1d2021;
  --bg1: #282828;
  --bg2: #3c3836;
  --bg3: #504945;
  --bg4: #665c54;
  --fg: #ebdbb2;
  --fg-dim: #a89984;
  --fg-faint: #504945;
  --red: #fb4934;
  --orange: #fe8019;
  --yellow: #fabd2f;
  --green: #b8bb26;
  --aqua: #8ec07c;
  --blue: #83a598;
  --purple: #d3869b;
  --gray: #928374;
  --border: #3c3836;
  --mono: 'IBM Plex Mono', monospace;
  --serif: 'Libre Baskerville', Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5 { font-family: var(--mono); font-weight: 600; line-height: 1.2; }
p { margin: 0; }

/* === layout === */
.site { max-width: 1160px; margin: 0 auto; padding: 0 2rem; }

/* === header === */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  animation: fadeUp .65s ease both;
}

.logo-mark { font-family: var(--mono); font-size: 1.55rem; font-weight: 700; letter-spacing: -.02em; }
.logo-mark .dot { color: var(--red); }
.logo-mark .tld { color: var(--green); }
.logo-sub {
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 300;
  color: var(--fg-dim);
  letter-spacing: .2em;
  text-transform: uppercase;
  margin-top: .15rem;
}

/* === nav === */
nav { display: flex; align-items: center; gap: 2rem; }
nav a {
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--fg-dim);
  letter-spacing: .1em;
  text-transform: uppercase;
  transition: color .18s;
}
nav a:hover { color: var(--yellow); }
.nav-rss {
  border: 1px solid var(--orange);
  color: var(--orange) !important;
  padding: .35em .8em;
  transition: background .18s, color .18s !important;
}
.nav-rss:hover { background: var(--orange) !important; color: var(--bg) !important; }
.nav-back { color: var(--orange) !important; }
.nav-back::before { content: '\2190\0020'; }

/* === footer === */
.site-footer {
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  animation: fadeUp .65s .38s ease both;
}
.footer-copy { font-family: var(--mono); font-size: .88rem; color: var(--fg-dim); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-family: var(--mono); font-size: .88rem; color: var(--fg-dim); transition: color .18s; }
.footer-links a:hover { color: var(--yellow); }

/* === tags === */
.tags { display: flex; gap: .35rem; flex-wrap: wrap; margin-bottom: .5rem; }
.tag {
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .18em .55em;
  border: 1px solid;
}
.t-yellow { color: var(--yellow); border-color: rgba(250,189,47,.3); background: rgba(250,189,47,.08); }
.t-aqua { color: var(--aqua); border-color: rgba(142,192,124,.3); background: rgba(142,192,124,.08); }
.t-red { color: var(--red); border-color: rgba(251,73,52,.3); background: rgba(251,73,52,.08); }
.t-green { color: var(--green); border-color: rgba(184,187,38,.3); background: rgba(184,187,38,.08); }
.t-orange { color: var(--orange); border-color: rgba(254,128,25,.3); background: rgba(254,128,25,.08); }
.t-blue { color: var(--blue); border-color: rgba(131,165,152,.3); background: rgba(131,165,152,.08); }
.t-purple { color: var(--purple); border-color: rgba(211,134,155,.3); background: rgba(211,134,155,.08); }
.t-gray { color: var(--gray); border-color: rgba(146,131,116,.3); background: rgba(146,131,116,.08); }

/* === home: hero === */
.hero {
  padding: 4rem 0 3.25rem;
  border-bottom: 1px solid var(--border);
  animation: fadeUp .65s .08s ease both;
}
.hero-eye {
  font-family: var(--mono);
  font-size: .66rem;
  color: var(--aqua);
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.hero-eye::before { content: ''; display: inline-block; width: 1.75rem; height: 1px; background: var(--aqua); }
.hero-title { font-size: clamp(1.9rem,5vw,3.4rem); font-weight: 700; letter-spacing: -.03em; max-width: 20ch; margin-bottom: 1.4rem; }
.hero-body { max-width: 52ch; font-size: 1rem; color: var(--fg-dim); margin-bottom: 2.25rem; }
.hero-cta {
  display: inline-block;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: var(--red);
  color: var(--bg);
  padding: .6em 1.5em;
  transition: background .18s;
}
.hero-cta:hover { background: var(--orange); }
.hero-date { font-family: var(--mono); font-size: .65rem; color: var(--fg-dim); margin-left: 1.25rem; }

/* === home: post list + sidebar === */
.main-grid { display: grid; grid-template-columns: 1fr 276px; border-bottom: 1px solid var(--border); }
.post-list {
  border-right: 1px solid var(--border);
  padding: 2.75rem 2.75rem 2.75rem 0;
  animation: fadeUp .65s .16s ease both;
}
.section-label {
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 1.75rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}
.section-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.post-card {
  display: grid;
  grid-template-columns: 2.8rem 1fr;
  gap: 0 1.4rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--border);
}
.post-card:last-child { border-bottom: none; }
.post-card:hover .post-num { color: var(--yellow); }
.post-card:hover .post-title { color: var(--yellow); }
.post-num { font-family: var(--mono); font-size: .75rem; color: var(--gray); padding-top: .3rem; transition: color .18s; }
.post-inner { display: flex; flex-direction: column; gap: .45rem; }
.post-title { font-family: var(--mono); font-size: 1.15rem; font-weight: 600; color: var(--fg); transition: color .18s; }
.post-excerpt { font-size: .95rem; color: var(--fg-dim); line-height: 1.6; }
.post-meta { font-family: var(--mono); font-size: .75rem; color: var(--fg-dim); display: flex; gap: 1rem; margin-top: .1rem; }

/* === home: sidebar === */
.sidebar {
  padding: 2.75rem 0 2.75rem 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  animation: fadeUp .65s .24s ease both;
}
.sb-block { display: flex; flex-direction: column; gap: .9rem; }
.sb-label {
  font-family: var(--mono);
  font-size: .6rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.about-text { font-size: .84rem; color: var(--fg-dim); line-height: 1.65; }
.topic-row { display: flex; justify-content: space-between; padding: .42rem 0; border-bottom: 1px solid var(--border); }
.topic-row:last-child { border-bottom: none; }
.topic-name { font-family: var(--mono); font-size: .7rem; color: var(--fg-dim); transition: color .18s; }
.topic-row:hover .topic-name { color: var(--yellow); }
.topic-count { font-family: var(--mono); font-size: .62rem; color: var(--fg-dim); }

/* === post: article layout === */
.article-wrap {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 0 4rem;
  padding: 3.5rem 0 4rem;
  align-items: start;
  animation: fadeUp .65s ease both;
}
.article-eye {
  font-family: var(--mono);
  font-size: .64rem;
  color: var(--aqua);
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.article-eye::before { content: ''; display: inline-block; width: 1.75rem; height: 1px; background: var(--aqua); }
.article-title {
  font-size: clamp(1.7rem,4vw,2.8rem);
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--fg);
  margin-bottom: 1.1rem;
  line-height: 1.1;
}
.article-meta {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--fg-dim);
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}
.draft-banner {
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--orange);
  border: 1px solid rgba(254,128,25,.3);
  background: rgba(254,128,25,.07);
  padding: .6em 1em;
  margin-bottom: 2.5rem;
  letter-spacing: .05em;
}

/* === post: prose === */
.prose > * + * { margin-top: 1.5em; }
.prose p { color: var(--fg); }
.prose h2 {
  font-size: 1.2rem;
  color: var(--yellow);
  margin-top: 2.75em;
  margin-bottom: -.5em;
  padding-bottom: .5em;
  border-bottom: 1px solid var(--border);
}
.prose h3 { font-size: .95rem; color: var(--aqua); margin-top: 2em; margin-bottom: -.5em; }
.prose strong { color: var(--fg); font-weight: 700; }
.prose em { font-style: italic; color: var(--fg-dim); }
.prose a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(131,165,152,.4); }
.prose a:hover { color: var(--aqua); }
.prose code {
  font-family: var(--mono);
  font-size: .82em;
  background: var(--bg1);
  color: var(--green);
  padding: .15em .45em;
  border: 1px solid var(--border);
}
.prose pre {
  border: 1px solid var(--border);
  border-left: 3px solid var(--yellow);
  padding: 1.25rem 1.4rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .8rem;
  line-height: 1.75;
}
.prose pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }
.prose blockquote {
  border-left: 3px solid var(--purple);
  padding: .5em 1.25em;
  color: var(--fg-dim);
  font-style: italic;
  background: rgba(211,134,155,.05);
}
.prose ul, .prose ol { padding-left: 1.5em; color: var(--fg-dim); }
.prose li { margin-top: .35em; }
.prose li::marker { color: var(--yellow); font-family: var(--mono); font-size: .8em; }

/* === post: table of contents === */
.toc { position: sticky; top: 2rem; border: 1px solid var(--border); padding: 1.25rem; background: var(--bg1); }
.toc-label {
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: .9rem;
}
.toc ul { list-style: none; padding: 0; counter-reset: toc; display: flex; flex-direction: column; gap: .1rem; }
.toc li { counter-increment: toc; }
.toc a {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--fg-dim);
  display: flex;
  gap: .5rem;
  align-items: baseline;
  padding: .3em 0;
  border-bottom: 1px solid var(--border);
  transition: color .18s;
  line-height: 1.4;
}
.toc li:last-child a { border-bottom: none; }
.toc a::before { content: counter(toc, decimal-leading-zero); color: var(--gray); font-size: .6rem; flex-shrink: 0; }
.toc a:hover { color: var(--yellow); }

/* === responsive === */
@media (max-width: 860px) {
  .main-grid { grid-template-columns: 1fr; }
  .post-list { border-right: none; padding-right: 0; }
  .sidebar { padding-left: 0; border-top: 1px solid var(--border); }
}

@media (max-width: 820px) {
  .article-wrap { grid-template-columns: 1fr; }
  .toc { position: static; }
}

@media (max-width: 540px) {
  .site { padding: 0 1.1rem; }
  .hide-sm { display: none; }
}