/* ============================================================
   SHARED BLOG STYLES — nav + listing + post prose
   ============================================================ */

/* ── Import same font as portfolio ────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Tokens (mirrors styles.css) ──────────────────────────── */
:root {
  --bg:           #06060d;
  --surface:      #0d0d18;
  --surface-2:    #12121f;
  --border:       rgba(148, 163, 184, 0.09);
  --border-hover: rgba(148, 163, 184, 0.18);

  --text:         #e2e8f0;
  --soft:         #94a3b8;
  --muted:        #64748b;

  --accent:       #22d3ee;
  --accent-dim:   rgba(34, 211, 238, 0.1);
  --accent-2:     #a78bfa;
  --accent-2-dim: rgba(167, 139, 250, 0.1);
  --green:        #4ade80;

  /* Derived / theme-switchable */
  --nav-bg:          rgba(6, 6, 13, 0.80);
  --nav-bg-scrolled: rgba(6, 6, 13, 0.94);
  --grid-line:       rgba(34, 211, 238, 0.04);
  --code-bg:         #0d1117;

  --nav-h:   64px;
  --max-w:   900px;
  --prose-w: 700px;
  --r:       10px;
  --r-sm:    6px;

  --font:      'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Navigation (same as portfolio) ────────────────────────── */
.site-nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, border-color 0.3s;
}
.site-nav.scrolled {
  background: var(--nav-bg-scrolled);
  border-bottom-color: var(--border-hover);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
}

.blink { animation: blink 1.2s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--soft);
  padding: 6px 12px;
  border-radius: var(--r-sm);
  transition: color 0.15s, background 0.15s;
}
.nav-link:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--accent); }

.nav-link-cta {
  background: var(--accent-dim);
  color: var(--accent) !important;
  border: 1px solid rgba(34, 211, 238, 0.2);
  margin-left: 6px;
}
.nav-link-cta:hover { background: rgba(34, 211, 238, 0.18); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--r-sm);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--soft);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-h);
    inset-inline: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px 16px;
    gap: 2px;
  }
  .nav-menu.open { display: flex; }
  .nav-link { text-align: center; padding: 10px; }
  .nav-link-cta { margin-left: 0; }
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn-primary, .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 20px;
  border-radius: var(--r-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s, border-color 0.18s;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #030712; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover {
  background: #67e8f9; border-color: #67e8f9;
  transform: translateY(-1px); box-shadow: 0 6px 24px rgba(34,211,238,0.3);
}
.btn-outline { background: transparent; color: var(--soft); border-color: var(--border); }
.btn-outline:hover {
  color: var(--text); border-color: var(--border-hover);
  background: rgba(255,255,255,0.04); transform: translateY(-1px);
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px 40px;
  margin-top: 80px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-name { font-family: var(--font-mono); font-size: 0.84rem; color: var(--accent); }
.footer-copy { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }


/* ============================================================
   BLOG INDEX — listing page
   ============================================================ */
.blog-hero {
  padding: calc(var(--nav-h) + 64px) 24px 64px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.blog-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.blog-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.blog-subtitle {
  color: var(--muted);
  font-size: 1rem;
  max-width: 460px;
  line-height: 1.7;
}

/* Tag filter bar */
.tag-filter {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.tag-btn:hover { border-color: var(--border-hover); color: var(--soft); }
.tag-btn.active {
  background: var(--accent-dim);
  border-color: rgba(34, 211, 238, 0.3);
  color: var(--accent);
}

/* Post listing grid */
.posts-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  align-items: start;
}

/* Post card */
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.post-card:hover {
  border-color: rgba(34, 211, 238, 0.28);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

/* Screenshot image */
.post-card-img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--border);
}

/* Placeholder when no screenshot */
.post-card-placeholder {
  width: 100%;
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.post-card-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
}
.post-card-initials {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 500;
  color: rgba(148, 163, 184, 0.2);
  position: relative;
  z-index: 1;
  letter-spacing: 0.1em;
}

/* Card body */
.post-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.post-card-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.post-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.35;
  transition: color 0.15s;
}
.post-card:hover .post-card-title { color: var(--accent); }

.post-card-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.post-card-excerpt {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
}

.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.post-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: transparent;
}

.post-card-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-top: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.15s;
}
.post-card:hover .post-card-link { gap: 8px; }

.no-posts {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--muted);
  padding: 40px 0;
}


/* ============================================================
   BLOG POST — prose reading experience
   ============================================================ */
.post-wrap {
  padding-top: var(--nav-h);
}

/* Back link bar */
.post-back {
  max-width: var(--prose-w);
  margin: 0 auto;
  padding: 24px 24px 0;
}
.back-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s;
}
.back-link:hover { color: var(--accent); }

/* Post header */
.post-header {
  max-width: var(--prose-w);
  margin: 0 auto;
  padding: 32px 24px 0;
}

.post-header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.post-header-date, .post-header-readtime {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.post-header-sep { color: var(--border-hover); }

.post-header-title {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: #f8fafc;
}

.post-header-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 32px;
}

.post-header-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid rgba(34, 211, 238, 0.2);
  color: var(--accent);
  background: var(--accent-dim);
}

.post-divider {
  max-width: var(--prose-w);
  margin: 0 auto 0;
  padding: 0 24px;
  border: none;
  border-top: 1px solid var(--border);
}

/* Prose body */
.prose {
  max-width: var(--prose-w);
  margin: 0 auto;
  padding: 40px 24px 80px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--soft);
}

.prose > * + * { margin-top: 1.5em; }

.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-top: 2.5em;
  margin-bottom: 0.6em;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

.prose h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 2em;
  margin-bottom: 0.4em;
}

.prose h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--soft);
  margin-top: 1.5em;
  margin-bottom: 0.3em;
}

.prose p { color: var(--soft); }

.prose a {
  color: var(--accent);
  border-bottom: 1px solid rgba(34, 211, 238, 0.3);
  transition: border-color 0.15s, color 0.15s;
}
.prose a:hover { border-color: var(--accent); }

.prose strong { color: var(--text); font-weight: 600; }
.prose em     { color: var(--soft); font-style: italic; }

/* Inline code */
.prose code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent-2);
  padding: 2px 7px;
  border-radius: 4px;
}

/* Code blocks — Prism.js overrides */
.prose pre {
  background: var(--code-bg) !important;
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: var(--r) !important;
  padding: 20px 20px !important;
  overflow-x: auto;
  position: relative;
  font-size: 0.875rem !important;
  line-height: 1.7 !important;
  margin: 1.8em 0 !important;
}

.prose pre code {
  font-family: var(--font-mono) !important;
  font-size: inherit !important;
  background: none !important;
  border: none !important;
  padding: 0 !important;
  color: inherit;
}

/* Code block filename / language label */
.code-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--r) var(--r) 0 0;
  padding: 6px 14px;
  display: inline-block;
  margin-bottom: -1px;
}
.code-label + pre { border-top-left-radius: 0 !important; }

/* Copy button */
.copy-btn {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 3px 10px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  z-index: 2;
}
.copy-btn:hover { color: var(--accent); border-color: rgba(34,211,238,0.3); }
.copy-btn.copied { color: var(--green); border-color: rgba(74,222,128,0.3); }

/* Lists */
.prose ul {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.prose ul li {
  padding-left: 20px;
  position: relative;
}
.prose ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8em;
  top: 4px;
}

.prose ol {
  padding-left: 1.4em;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.prose ol li { padding-left: 6px; }
.prose ol li::marker { color: var(--accent); font-family: var(--font-mono); font-size: 0.85em; }

/* Blockquote */
.prose blockquote {
  border-left: 3px solid var(--accent-2);
  padding: 12px 20px;
  background: rgba(167, 139, 250, 0.05);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin: 1.8em 0;
  color: var(--soft);
  font-style: italic;
}
.prose blockquote > * + * { margin-top: 0.75em; }

/* Horizontal rule */
.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3em 0;
}

/* Images */
.prose img {
  max-width: 100%;
  border-radius: var(--r);
  border: 1px solid var(--border);
}

/* Tables */
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  overflow-x: auto;
  display: block;
}
.prose th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--surface);
  padding: 10px 14px;
  border-bottom: 1px solid rgba(34,211,238,0.2);
  text-align: left;
  white-space: nowrap;
}
.prose td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--soft);
  vertical-align: top;
}
.prose tr:last-child td { border-bottom: none; }

/* KaTeX display math */
.prose .katex-display {
  overflow-x: auto;
  padding: 12px 0;
}

/* Callout boxes */
.callout {
  border-radius: var(--r);
  padding: 16px 18px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 1.8em 0;
  font-size: 0.9rem;
  line-height: 1.65;
}
.callout-info    { background: rgba(34,211,238,0.06);  border: 1px solid rgba(34,211,238,0.15);  color: var(--soft); }
.callout-warn    { background: rgba(251,191,36,0.07);  border: 1px solid rgba(251,191,36,0.2);   color: var(--soft); }
.callout-tip     { background: rgba(74,222,128,0.06);  border: 1px solid rgba(74,222,128,0.15);  color: var(--soft); }
.callout-icon    { font-size: 1.1rem; flex-shrink: 0; }

/* Post footer nav */
.post-footer {
  max-width: var(--prose-w);
  margin: 0 auto;
  padding: 0 24px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}