/* ── Light mode (default) ── */
:root {
  --bg: #f7f5f2;
  --bg2: #edeae5;
  --border: #ddd9d3;
  --text: #1a1714;
  --muted: #8a837a;
  --accent: #9a6f2a;
  --accent-h: #b07f35;
  --code-bg: #edeae5;
  --radius: 3px;
  --col: 720px;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --serif: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  color-scheme: light;
}

/* ── Dark mode ── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --bg2: #111;
    --border: #222;
    --text: #ede9e1;
    --muted: #6b6560;
    --accent: #c4974a;
    --accent-h: #d4a85a;
    --code-bg: #141414;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent-h); }
img { max-width: 100%; display: block; }

.site-header { border-bottom: 1px solid var(--border); padding: 1rem 2rem; }
.site-header nav { max-width: var(--col); margin: 0 auto; }
.back-link { font-family: var(--mono); font-size: .8rem; color: var(--muted); letter-spacing: .05em; }
.back-link:hover { color: var(--accent); }

.home-container { max-width: var(--col); margin: 0 auto; padding: 4rem 2rem 6rem; }

.profile { text-align: center; padding: 3rem 0 3.5rem; border-bottom: 1px solid var(--border); }

.avatar-wrap {
  width: 88px; height: 88px; border-radius: 50%; overflow: hidden;
  margin: 0 auto 1.25rem; border: 2px solid var(--border); background: var(--bg2);
}
.avatar-wrap img { width: 100%; height: 100%; object-fit: cover; }
.avatar-placeholder {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 1.5rem; color: var(--muted);
}

.site-title { font-size: 1.5rem; font-weight: 600; letter-spacing: -.01em; margin-bottom: .5rem; }

.contact-links { display: flex; justify-content: center; gap: 2rem; margin-top: 1.25rem; }
.contact-link {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .06em; color: var(--muted);
  text-transform: uppercase; display: flex; align-items: center; gap: .4rem; transition: color .15s;
}
.contact-link:hover { color: var(--accent); }

.category-nav { display: flex; gap: .25rem; flex-wrap: wrap; margin: 2.5rem 0 1.75rem; }
.cat-btn {
  background: none; border: 1px solid var(--border); color: var(--muted);
  font-family: var(--mono); font-size: .78rem; letter-spacing: .06em; text-transform: uppercase;
  padding: .35rem .85rem; border-radius: var(--radius); cursor: pointer; transition: all .15s;
}
.cat-btn:hover, .cat-btn.active { border-color: var(--accent); color: var(--accent); }

.post-list { list-style: none; }
.post-item {
  padding: 1.4rem 0; border-bottom: 1px solid var(--border);
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
}
.post-item:first-child { border-top: 1px solid var(--border); }
.post-item-left { flex: 1; min-width: 0; }
.post-item-title {
  font-size: 1.15rem; font-weight: 600; color: var(--text); display: block;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: .25rem;
}
.post-item-title:hover { color: var(--accent); }
.post-item-cat { font-family: var(--mono); font-size: .72rem; color: var(--muted); letter-spacing: .04em; }
.post-item-date { font-family: var(--mono); font-size: .75rem; color: var(--muted); white-space: nowrap; flex-shrink: 0; }

.state-msg { padding: 3rem 0; text-align: center; font-family: var(--mono); font-size: .85rem; color: var(--muted); }

.pagination { display: flex; justify-content: center; align-items: center; gap: .5rem; margin-top: 2.5rem; }
.page-btn {
  background: none; border: 1px solid var(--border); color: var(--muted);
  font-family: var(--mono); font-size: .8rem; padding: .3rem .7rem;
  border-radius: var(--radius); cursor: pointer; transition: all .15s;
}
.page-btn:hover:not(:disabled), .page-btn.active { border-color: var(--accent); color: var(--accent); }
.page-btn:disabled { opacity: .3; cursor: default; }
.page-info { font-family: var(--mono); font-size: .78rem; color: var(--muted); padding: 0 .5rem; }

.post-container { max-width: var(--col); margin: 0 auto; padding: 3.5rem 2rem 6rem; }
.post-meta-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }
.category-chip {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent); padding: .2rem .6rem; border-radius: var(--radius);
}
.category-chip:hover { background: var(--accent); color: var(--bg); }
.post-date { font-family: var(--mono); font-size: .78rem; color: var(--muted); }
.post-title { font-size: clamp(1.75rem, 5vw, 2.6rem); font-weight: 600; line-height: 1.2; letter-spacing: -.02em; margin-bottom: 2.5rem; }

.markdown-body { font-size: 1.1rem; line-height: 1.8; }
.markdown-body h1,.markdown-body h2,.markdown-body h3,
.markdown-body h4,.markdown-body h5,.markdown-body h6 { margin: 2rem 0 .75rem; font-weight: 600; line-height: 1.3; letter-spacing: -.01em; }
.markdown-body h1 { font-size: 1.9rem; }
.markdown-body h2 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: .4rem; }
.markdown-body h3 { font-size: 1.25rem; }
.markdown-body p { margin-bottom: 1.25rem; }
.markdown-body ul,.markdown-body ol { margin: 0 0 1.25rem 1.5rem; }
.markdown-body li { margin-bottom: .35rem; }
.markdown-body blockquote {
  border-left: 3px solid var(--accent); margin: 1.5rem 0; padding: .75rem 1.25rem;
  background: var(--bg2); color: var(--muted); font-style: italic;
}
.markdown-body code {
  font-family: var(--mono); font-size: .85em; background: var(--code-bg);
  border: 1px solid var(--border); padding: .15em .4em; border-radius: var(--radius);
}
.markdown-body pre {
  background: var(--code-bg) !important; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem; overflow-x: auto; margin: 1.5rem 0;
}
.markdown-body pre code { background: none !important; border: none; padding: 0; font-size: .875rem; }
.markdown-body img { border-radius: var(--radius); margin: 1.5rem auto; }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
.markdown-body table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: .95rem; }
.markdown-body th,.markdown-body td { border: 1px solid var(--border); padding: .6rem 1rem; text-align: left; }
.markdown-body th { background: var(--bg2); font-family: var(--mono); font-size: .8rem; letter-spacing: .04em; }
.markdown-body a { border-bottom: 1px dotted var(--accent); }

/* hljs: light mode override (dark mode uses github-dark which is fine) */
@media (prefers-color-scheme: light) {
  .hljs { background: var(--code-bg) !important; color: #24292e !important; }
}

.not-found {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 60vh; text-align: center; gap: 1rem;
}
.not-found h1 { font-size: 6rem; font-family: var(--mono); color: var(--muted); }
.not-found p { color: var(--muted); }

@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
.skeleton {
  background: linear-gradient(90deg, var(--bg2) 25%, var(--border) 50%, var(--bg2) 75%);
  background-size: 400px 100%; animation: shimmer 1.4s infinite; border-radius: var(--radius);
}

@media (max-width: 600px) {
  .site-header { padding: .75rem 1rem; }
  .home-container, .post-container { padding-left: 1rem; padding-right: 1rem; }
  .contact-links { gap: 1.25rem; }
  .post-item { flex-direction: column; gap: .25rem; }
  .post-item-date { align-self: flex-start; }
}