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

:root {
  --bg: #f5f2eb;
  --text: #232220;
  --text-light: #7a7772;
  --accent: #4a6b8a;
  --link: #3d5a75;
  --border: #ddd8ce;
  --code-bg: #eae5da;
  --code-block-bg: #1e1e1e;
  --code-block-text: #d4d4d4;
  --max-width: 920px;
}

[data-theme="dark"] {
  --bg: #181816;
  --text: #d6d3cc;
  --text-light: #8a877f;
  --accent: #7ba3c4;
  --link: #7ba3c4;
  --border: #2c2b27;
  --code-bg: #22211e;
  --code-block-bg: #0f0f0d;
  --code-block-text: #d4d0c8;
}

html { font-size: 21px; }

body {
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

::selection { background: var(--accent); color: var(--bg); }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; width: 100%; }

/* --- Header --- */
.site-header {
  padding: 2rem 0 0;
}

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

.site-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.site-title:hover { color: var(--accent); text-decoration: none; }

nav { display: flex; gap: 1.25rem; align-items: center; }

nav a {
  font-size: 0.82rem;
  color: var(--text-light);
  transition: color 0.15s;
}
nav a:hover { color: var(--text); text-decoration: none; }

.theme-btn {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
  transition: color 0.15s;
}
.theme-btn:hover { color: var(--text); }

[data-theme="light"] .t-dark { display: none; }
[data-theme="dark"] .t-light { display: none; }

/* --- Intro --- */
.intro {
  padding: 3.5rem 0 2.5rem;
}

.intro h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.3rem;
}

.intro .role {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 0.6rem;
}

.intro .bio {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.intro .links {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.intro .links a {
  color: var(--text-light);
  display: flex;
  align-items: center;
  transition: color 0.15s;
}
.intro .links a:hover { color: var(--accent); text-decoration: none; }
.intro .links svg { width: 18px; height: 18px; }

/* --- Section --- */
.section {
  padding-bottom: 3rem;
}

.section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

/* --- Article list --- */
.article-list { list-style: none; }

.article-list li { border-bottom: 1px solid var(--border); }
.article-list li:first-child { border-top: 1px solid var(--border); }

.article-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.6rem 0;
  color: var(--text);
  transition: color 0.15s;
}
.article-list a:hover { color: var(--accent); text-decoration: none; }

.article-list .title { font-size: 0.9rem; font-weight: 450; }

.article-list time {
  font-size: 0.78rem;
  color: var(--text-light);
  flex-shrink: 0;
  white-space: nowrap;
}

.view-more {
  font-size: 0.8rem;
  display: inline-block;
  margin-top: 0.6rem;
  color: var(--text-light);
}
.view-more:hover { color: var(--accent); }

/* --- List page --- */
.list-header { padding: 3rem 0 1.5rem; }
.list-header h1 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; }
.list-header p { font-size: 0.88rem; color: var(--text-light); margin-top: 0.25rem; }

/* --- Post --- */
.post { padding: 3rem 0 4rem; }

.post > header { margin-bottom: 2rem; }
.post > header time {
  font-size: 0.78rem;
  color: var(--text-light);
  display: block;
  margin-bottom: 0.4rem;
}
.post > header h1 {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.post-content { font-size: 0.95rem; }

.post-content h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 2.25rem 0 0.5rem;
  letter-spacing: -0.01em;
}
.post-content h3 { font-size: 1rem; font-weight: 700; margin: 1.75rem 0 0.5rem; }
.post-content h4 {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
  margin: 1.5rem 0 0.5rem;
}
.post-content p { margin-bottom: 1em; }
.post-content ul, .post-content ol { margin-bottom: 1em; padding-left: 1.25rem; }
.post-content li { margin-bottom: 0.2rem; }

.post-content blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
  margin: 1.25rem 0;
  color: var(--text-light);
}

.post-content code {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.84em;
  background: var(--code-bg);
  padding: 0.12em 0.35em;
  border-radius: 3px;
}

.post-content pre {
  background: var(--code-block-bg);
  color: var(--code-block-text);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1.25rem 0;
  font-size: 0.8rem;
  line-height: 1.6;
  border-radius: 6px;
}
.post-content pre code { background: none; padding: 0; font-size: inherit; color: inherit; }

.post-content table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; font-size: 0.88rem; }
.post-content th, .post-content td { padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--border); text-align: left; }
.post-content th { font-weight: 600; font-size: 0.78rem; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.04em; }

.post-content img { display: block; margin: 1.5rem auto; border-radius: 6px; }

.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  gap: 1rem;
}
.post-nav a { flex: 1; }
.post-nav-next { text-align: right; }

/* --- 404 --- */
.page-404 { text-align: center; padding: 8rem 0; }
.page-404 h1 { font-size: 3rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 0.5rem; }
.page-404 p { color: var(--text-light); font-size: 0.9rem; }

/* --- Responsive --- */
@media (max-width: 600px) {
  .intro { padding: 2.5rem 0 2rem; }
  .intro h1 { font-size: 1.3rem; }
  .post > header h1 { font-size: 1.3rem; }
  .header-row { padding-bottom: 0.75rem; }
  nav { gap: 1rem; }
  .article-list a {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }
  .article-list time { font-size: 0.72rem; }
  .post-nav { flex-direction: column; }
  .post-nav-next { text-align: left; }
}