@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600&display=swap');

/* ─── Variables (matches main site) ──────── */
:root {
  --bg:        #f9f8f5;
  --surface:   #ffffff;
  --ink:       #1a1916;
  --muted:     #72706a;
  --accent:    #1a4a8a;
  --accent2:   #c0522a;
  --border:    #e4e0d8;
  --serif:     'Source Serif 4', Georgia, serif;
  --mono:      'DM Mono', monospace;
  --sans:      'DM Sans', sans-serif;
  --header-h:  58px;
  --max-w:     1100px;
  --radius:    10px;
}

/* ─── Reset ──────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body { background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }

/* ─── Header (identical to main site) ───── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(249,248,245,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 2rem;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.logo { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; color: var(--ink); }
.logo:hover { text-decoration: none; }
.nav { display: flex; gap: 0.25rem; }
.nav-link {
  padding: 0.35rem 0.75rem; border-radius: 5px;
  font-size: 0.85rem; font-weight: 500; color: var(--muted);
  transition: color 0.15s, background 0.15s;
}
.nav-link:hover { color: var(--ink); background: rgba(0,0,0,0.05); }
.nav-link.active { color: var(--accent); background: rgba(26,74,138,0.08); }

/* ─── Container ──────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem 5rem; }

/* ─── Hero ───────────────────────────────── */
.blog-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 3rem 2rem 2rem;
  margin-bottom: 2.5rem;
}
.blog-hero > * { max-width: var(--max-w); margin-left: auto; margin-right: auto; }

.blog-title {
  font-family: var(--serif);
  font-size: 2.2rem; font-weight: 600;
  color: var(--ink); margin-bottom: 0.5rem;
}
.blog-subtitle {
  font-size: 0.95rem; color: var(--muted);
  margin-bottom: 1.75rem;
}

/* ─── Filter bar ─────────────────────────── */
.filter-bar {
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}
.filter-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 20px; padding: 0.3rem 0.9rem;
  font-size: 0.78rem; font-family: var(--mono);
  color: var(--muted); cursor: pointer;
  transition: all 0.15s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.search-box {
  margin-left: auto;
  border: 1px solid var(--border); background: var(--bg);
  border-radius: 20px; padding: 0.3rem 1rem;
  font-size: 0.82rem; font-family: var(--sans); color: var(--ink);
  width: 200px; outline: none;
  transition: border-color 0.2s;
}
.search-box:focus { border-color: var(--accent); }
.search-box::placeholder { color: var(--muted); }

/* ─── Card grid ──────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

/* ─── Individual card ────────────────────── */
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  cursor: pointer;
  display: flex; flex-direction: column; gap: 0.75rem;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
  animation: fadeUp 0.35s ease both;
}
.post-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  border-color: #c8c2b6;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Stagger animation for cards */
.post-card:nth-child(1) { animation-delay: 0.00s; }
.post-card:nth-child(2) { animation-delay: 0.05s; }
.post-card:nth-child(3) { animation-delay: 0.10s; }
.post-card:nth-child(4) { animation-delay: 0.15s; }
.post-card:nth-child(5) { animation-delay: 0.20s; }
.post-card:nth-child(6) { animation-delay: 0.25s; }

.card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.5rem; }

.card-date {
  font-family: var(--mono); font-size: 0.7rem;
  color: var(--muted); white-space: nowrap; padding-top: 0.1rem;
}

.card-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; justify-content: flex-end; }
.tag {
  background: #eee9e0; color: var(--muted);
  font-size: 0.65rem; font-family: var(--mono);
  padding: 0.15rem 0.5rem; border-radius: 3px;
  text-transform: lowercase;
}
.tag.reading  { background: #ddeeff; color: #1a4a8a; }
.tag.research { background: #fde8dc; color: #a03a18; }
.tag.ideas    { background: #e4f5e4; color: #2a6a2a; }

.card-title {
  font-family: var(--serif);
  font-size: 1.05rem; font-weight: 600;
  color: var(--ink); line-height: 1.35;
  transition: color 0.15s;
}
.post-card:hover .card-title { color: var(--accent); }

.card-excerpt {
  font-size: 0.83rem; color: var(--muted);
  line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-footer {
  display: flex; align-items: center; justify-content: flex-end;
  padding-top: 0.5rem; border-top: 1px solid var(--border);
  margin-top: auto;
}
.card-read-more {
  font-size: 0.75rem; font-weight: 600;
  color: var(--accent); font-family: var(--sans);
  letter-spacing: 0.02em;
}
.post-card:hover .card-read-more::after { content: " →"; }

/* ─── No results ─────────────────────────── */
.no-results { text-align: center; color: var(--muted); font-size: 0.88rem; padding: 4rem 0; }

/* ─── Post reader ────────────────────────── */
.post-container { max-width: 720px; padding-top: 2.5rem; }

.back-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 6px; padding: 0.4rem 0.9rem;
  font-size: 0.8rem; color: var(--muted); cursor: pointer;
  font-family: var(--sans); transition: all 0.15s;
  margin-bottom: 2.5rem; display: inline-block;
}
.back-btn:hover { border-color: var(--accent); color: var(--accent); }

.post-body { animation: fadeUp 0.3s ease; }

.post-meta-header {
  margin-bottom: 2.5rem; padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.post-meta-date { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); margin-bottom: 0.6rem; }
.post-meta-title { font-family: var(--serif); font-size: 2rem; font-weight: 600; line-height: 1.25; color: var(--ink); margin-bottom: 0.9rem; }
.post-meta-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }

/* Markdown */
.post-body h1,.post-body h2,.post-body h3 { font-family: var(--serif); color: var(--ink); margin: 2rem 0 0.75rem; line-height: 1.3; }
.post-body h1 { font-size: 1.7rem; }
.post-body h2 { font-size: 1.3rem; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
.post-body h3 { font-size: 1.1rem; }
.post-body p  { margin-bottom: 1.1rem; line-height: 1.8; font-size: 0.97rem; color: #2c2a25; }
.post-body a  { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.post-body ul,.post-body ol { margin: 0 0 1.1rem 1.5rem; }
.post-body li { margin-bottom: 0.35rem; font-size: 0.97rem; line-height: 1.7; }
.post-body blockquote { border-left: 3px solid var(--accent2); padding: 0.6rem 1.2rem; margin: 1.5rem 0; background: rgba(192,82,42,0.04); font-style: italic; color: #4a4640; }
.post-body blockquote p { margin-bottom: 0; }
.post-body code { font-family: var(--mono); font-size: 0.82rem; background: #eee9e0; padding: 0.15em 0.4em; border-radius: 3px; color: #b8440c; }
.post-body pre { background: #1a1916; border-radius: 8px; padding: 1.2rem 1.4rem; overflow-x: auto; margin: 1.25rem 0; }
.post-body pre code { background: none; padding: 0; color: #c8c2b8; font-size: 0.83rem; }
.post-body hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
.post-body table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; font-size: 0.88rem; }
.post-body th { background: #eee9e0; text-align: left; padding: 0.6rem 0.9rem; font-weight: 500; border: 1px solid var(--border); }
.post-body td { padding: 0.55rem 0.9rem; border: 1px solid var(--border); }

/* ─── Utilities ──────────────────────────── */
.hidden { display: none !important; }

/* ─── Responsive ─────────────────────────── */
@media (max-width: 640px) {
  .blog-hero { padding: 2rem 1.25rem 1.5rem; }
  .container { padding: 0 1.25rem 4rem; }
  .card-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 0 1.25rem; }
  .search-box { width: 140px; }
  .post-meta-title { font-size: 1.5rem; }
}