:root, [data-theme="dark"] {
  --bg: #0a0a0a;
  --surface: #111111;
  --border: #1e1e1e;
  --row-border: #161616;
  --green: #00ff87;
  --red: #ff3b3b;
  --yellow: #ffd166;
  --dim: #7a7a7a;
  --text: #e8e8e8;
  --muted: #8a8a8a;
  --code-text: #9a9a9a;
}

[data-theme="light"] {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e2e2e2;
  --row-border: #efefef;
  --green: #007a43;
  --red: #d8261f;
  --yellow: #b07a00;
  --dim: #6f6f6f;
  --text: #161616;
  --muted: #6a6a6a;
  --code-text: #444;
}

:root {
  --mono: 'Space Mono', monospace;
  --sans: 'DM Sans', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.2s ease, color 0.2s ease;
}

.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;
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  z-index: 100;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.6rem 1rem;
  border-radius: 2px;
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 0.5rem; }

header {
  border-bottom: 1px solid var(--border);
  padding: 2rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.logo .good { color: var(--green); }
.logo .sep  { color: var(--dim); margin: 0 0.2em; }
.logo .bad  { color: var(--red); }

.header-right { display: flex; align-items: center; gap: 1.5rem; }

.nav-link {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-link:hover { color: var(--text); border-bottom-color: var(--muted); }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--muted); }
.theme-toggle .icon { width: 12px; height: 12px; display: inline-block; }

[data-theme="dark"] .theme-toggle .icon-sun  { display: inline-block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .label::after { content: 'light'; }
[data-theme="light"] .theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: inline-block; }
[data-theme="light"] .theme-toggle .label::after { content: 'dark'; }

/* ARTICLE */
.article {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 3.5rem 2rem 4rem;
}

.back-link {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 2rem;
}
.back-link:hover { color: var(--text); }

.article-title {
  font-family: var(--mono);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.article-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--dim);
  margin-bottom: 2.5rem;
}

.article h2 {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
}

.article h3 {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 2rem 0 0.8rem;
}

.article p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  font-weight: 300;
  margin-bottom: 1.3rem;
}

.article ul, .article ol {
  margin: 0 0 1.3rem 1.4rem;
  line-height: 1.8;
  font-weight: 300;
}
.article li { margin-bottom: 0.4rem; }

.article a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}
.article a:hover { border-bottom-color: var(--green); }

.article code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--code-text);
  background: var(--surface);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

.article pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.3rem;
}
.article pre code { background: none; padding: 0; color: var(--code-text); }

.article blockquote {
  border-left: 2px solid var(--border);
  padding-left: 1rem;
  color: var(--muted);
  margin: 0 0 1.3rem;
}

.article strong { color: var(--text); font-weight: 600; }

/* POST INDEX */
.post-list { list-style: none; margin: 0; padding: 0; }

.post-link {
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--row-border);
}
.post-link:last-child { border-bottom: none; }

.post-title {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}
.post-link a { text-decoration: none; border: none; }
.post-link a:hover .post-title { color: var(--green); }

.post-meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--dim);
  margin: 0.3rem 0 0.5rem;
}

.post-summary {
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 300;
  line-height: 1.6;
}

.empty {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.9rem;
}

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 3rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--dim);
}
footer a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
footer a:hover { color: var(--text); border-bottom-color: var(--muted); }

@media (max-width: 900px) {
  header, footer { padding-left: 1.5rem; padding-right: 1.5rem; }
}