/* ---------- tokens ---------- */
:root {
  --paper: #000000;
  --paper-raised: #0D0D0D;
  --ink: #FFFFFF;
  --ink-soft: #C9C9C9;
  --ink-faint: #8C8C8C;
  --accent: #4AFA9A;
  --accent-soft: rgba(74, 250, 154, 0.12);
  --rule: rgba(245, 245, 245, 0.18);
  --code-bg: #0A0F0C;

  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --measure: 640px;
  --wide: 760px;
}

:root[data-theme="light"] {
  --paper: #FFFFFF;
  --paper-raised: #F2F2F2;
  --ink: #000000;
  --ink-soft: #3A3A3A;
  --ink-faint: #6B6B6B;
  --accent: #0E9A56;
  --accent-soft: rgba(14, 154, 86, 0.08);
  --rule: rgba(0, 0, 0, 0.16);
  --code-bg: #F2F2F2;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.65;
  letter-spacing: 0.01em;
  transition: background-color 0.2s ease, color 0.2s ease;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ---------- layout ---------- */
.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 24px 96px;
}

/* ---------- header ---------- */
.site-head {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 56px 24px 0;
}
.site-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-title {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
}
.cursor {
  color: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
}
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.icon-sun { display: none; }
.icon-moon { display: block; }
:root[data-theme="light"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: block; }

.site-tagline {
  margin: 6px 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.site-nav {
  margin-top: 22px;
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
/* ---------- intro / homepage ---------- */
.intro {
  padding-top: 48px;
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 54ch;
}

/* ---------- post list ---------- */
.post-list { margin-top: 40px; }
.post-list h2 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-faint);
  margin: 0 0 8px;
}
.post-row {
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}
.post-row:last-child { border-bottom: 1px solid var(--rule); }
.post-row-title {
  display: inline-block;
  font-size: 1.15rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink);
}
.post-row-title:hover { color: var(--accent); text-decoration: underline; }
.post-row-meta {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
}
.post-row-summary {
  margin: 10px 0 0;
  color: var(--ink-soft);
  max-width: 58ch;
}
.more-link { margin-top: 28px; }
.more-link a, .back-link a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
}

/* ---------- single page / post ---------- */
.page-title {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 44px 0 0;
  letter-spacing: -0.01em;
}
.single .post-row-meta { margin-top: 10px; }
.prose { margin-top: 32px; max-width: 66ch; }
.prose p, .prose ul, .prose ol, .prose blockquote { margin: 0 0 20px; }
.prose h2 {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  margin: 40px 0 14px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}
.prose h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  margin: 32px 0 12px;
}
.prose a { color: var(--accent); text-decoration-color: var(--accent-soft); }
.prose blockquote {
  margin-left: 0;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
  color: var(--ink-soft);
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
.prose pre {
  background: var(--code-bg);
  padding: 18px 20px;
  overflow-x: auto;
  border-radius: 4px;
  margin: 0 0 24px;
}
.prose pre code { background: none; padding: 0; }
.back-link { margin-top: 48px; }

/* ---------- pagination ---------- */
.pagination { margin-top: 40px; }
.pagination ul {
  list-style: none;
  display: flex;
  gap: 16px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.pagination a { color: var(--accent); text-decoration: none; }

/* ---------- footer ---------- */
.site-foot {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 40px 24px 64px;
  border-top: 1px solid var(--rule);
}
.site-foot p {
  color: var(--ink-faint);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}
.site-foot a { color: var(--ink-faint); }
.site-foot a:hover { color: var(--accent); }

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  body { font-size: 16px; }
  .site-head { padding-top: 40px; }
  .page-title { font-size: 1.35rem; }
  .site-nav { gap: 14px; }
}