/* ===== Variables ===== */
:root {
  --bg:       #0f0f0f;
  --surface:  #181818;
  --fg:       #c8c8c8;
  --fg-dim:   #777;
  --accent:   #4af626;
  --code-bg:  #1a1a1a;
  --border:   #2a2a2a;
  --font:     'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, 'Courier New', monospace;
  --max-w:    720px;
}

[data-theme="light"] {
  --bg:       #f5f5f0;
  --surface:  #ebebeb;
  --fg:       #1a1a1a;
  --fg-dim:   #666;
  --accent:   #006400;
  --border:   #cececa;
  /* code-bg stays dark in light mode — code blocks are always terminal-style */
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 15px;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: var(--font);
  line-height: 1.75;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  margin: 2rem 0 0.75rem;
  font-weight: 600;
}

h1 { font-size: 1.5rem; margin-top: 0; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; font-style: italic; color: var(--fg-dim); }
h5, h6 { font-size: 0.95rem; color: var(--fg-dim); }

p { margin: 0 0 1rem; }

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

ul, ol { margin: 0 0 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.25rem; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

blockquote {
  border-left: 3px solid var(--accent);
  margin: 0 0 1rem;
  padding: 0.5rem 0 0.5rem 1rem;
  color: var(--fg-dim);
}

strong { color: var(--fg); }

/* ===== Code ===== */
code {
  font-family: var(--font);
  font-size: 0.9em;
  background: var(--code-bg);
  color: var(--accent);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 0 0 1.5rem;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
  color: #c8c8c8; /* fixed light color — code blocks always dark */
}

/* highlight.js: prevent theme from overriding our pre background */
.hljs { background: var(--code-bg) !important; }

/* ===== Layout ===== */
main {
  flex: 1;
  padding: 3rem 0 4rem;
}

/* ===== Header ===== */
header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}

nav {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}

.site-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--fg);
  margin-right: 2rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.site-title:hover { color: var(--accent); text-decoration: none; }

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

.nav-links a {
  color: var(--fg-dim);
  font-size: 0.875rem;
  text-decoration: none;
}
.nav-links a:hover { color: var(--accent); }

.nav-sep { color: var(--border); user-select: none; }

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.875rem;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  line-height: 1;
}
#theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Footer ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--fg-dim);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

footer a { color: var(--fg-dim); }
footer a:hover { color: var(--accent); text-decoration: none; }

.footer-copy { margin: 0 0 0 auto; font-size: 0.8rem; }

/* ===== Homepage ===== */
.home {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.avatar {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-bottom: 1.25rem;
  display: block;
}

.home h1 {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.tagline {
  color: var(--fg-dim);
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
}

.social {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.social a { color: var(--fg-dim); font-size: 0.875rem; }
.social a:hover { color: var(--accent); text-decoration: none; }

.recent-posts h2 {
  font-size: 0.875rem;
  text-transform: lowercase;
  color: var(--fg-dim);
  letter-spacing: 0.05em;
  margin: 0 0 0.75rem;
  font-weight: 400;
}

.recent-posts ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.recent-posts li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}
.recent-posts li:first-child { border-top: 1px solid var(--border); }

.recent-posts a { color: var(--fg); font-size: 0.9rem; }
.recent-posts a:hover { color: var(--accent); text-decoration: none; }

.post-year {
  color: var(--fg-dim);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* ===== Page (about, experiences) ===== */
.page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page > h1 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 2rem;
}

.profile-img {
  float: right;
  height: 240px;
  margin: 0 0 1.5rem 2.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* ===== Post ===== */
.post {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post-header h1 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.post-header time {
  color: var(--fg-dim);
  font-size: 0.875rem;
}

.tags {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  background: var(--code-bg);
  border: 1px solid var(--border);
  color: var(--fg-dim);
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  font-size: 0.8rem;
}

/* ===== Posts list ===== */
.posts-list {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.posts-list h1 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 2rem;
}

.posts-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.posts-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}
.posts-list li:first-child { border-top: 1px solid var(--border); }

.posts-list a { color: var(--fg); font-size: 0.9rem; }
.posts-list a:hover { color: var(--accent); text-decoration: none; }

.posts-list time {
  color: var(--fg-dim);
  font-size: 0.85rem;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===== Skip link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--accent);
  color: var(--bg);
  padding: 0.4rem 0.9rem;
  border-radius: 0 0 4px 4px;
  font-size: 0.875rem;
  text-decoration: none;
  z-index: 999;
}
.skip-link:focus { top: 0; }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .profile-img {
    float: none;
    display: block;
    height: 180px;
    margin: 0 0 1.5rem;
  }

  .posts-list li,
  .recent-posts li {
    flex-direction: column;
    gap: 0.2rem;
  }
}

@media (max-width: 480px) {
  nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .site-title { margin-right: 0; }
  .nav-links { gap: 0.75rem; }
  .nav-sep { display: none; }
}

/* ===== Post meta (date + reading time) ===== */
.post-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg-dim);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}
.meta-sep { color: var(--border); }
.reading-time { color: var(--fg-dim); font-size: 0.85rem; }

/* ===== Post list: right-side meta ===== */
.post-right {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-shrink: 0;
  color: var(--fg-dim);
  font-size: 0.85rem;
  white-space: nowrap;
}
.posts-list li {
  align-items: baseline;
}

/* ===== Table of contents ===== */
.toc {
  margin: 0 0 2rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.875rem;
}
.toc details { padding: 0; }
.toc summary {
  list-style: none;
  cursor: pointer;
  padding: 0.6rem 1rem;
  color: var(--fg-dim);
  user-select: none;
}
.toc summary::-webkit-details-marker { display: none; }
.toc summary::before { content: '▸ '; }
details[open] .toc summary::before { content: '▾ '; }
.toc ul {
  list-style: none;
  padding: 0.25rem 0 0.75rem;
  margin: 0;
  border-top: 1px solid var(--border);
}
.toc li { padding: 0; margin: 0; }
.toc a {
  display: block;
  padding: 0.2rem 1rem;
  color: var(--fg-dim);
  text-decoration: none;
}
.toc a:hover { color: var(--accent); }
.toc-h3 { padding-left: 1rem; }

/* ===== Prev/next post navigation ===== */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
  font-size: 0.875rem;
}
.post-nav a { color: var(--fg-dim); text-decoration: none; max-width: 45%; }
.post-nav a:hover { color: var(--accent); }
.post-nav-next { margin-left: auto; text-align: right; }

/* ===== Blog filter ===== */
.blog-filter {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
#post-search {
  font-family: var(--font);
  font-size: 0.875rem;
  background: var(--surface);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  width: 100%;
  outline: none;
}
#post-search:focus { border-color: var(--accent); }
#post-search::placeholder { color: var(--fg-dim); }
.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag-btn {
  font-family: var(--font);
  font-size: 0.8rem;
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  cursor: pointer;
}
.tag-btn:hover { border-color: var(--accent); color: var(--accent); }
.tag-btn.active { border-color: var(--accent); color: var(--accent); background: var(--surface); }
#no-results { color: var(--fg-dim); font-size: 0.875rem; padding: 1rem 0; }