/* Shared blog stylesheet (static; not generated). Colors come from the theme variables. */
:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --border: #222;
  --text: #e5e5e5;
  --text-dim: #888;
  --accent: #3b82f6;
  --accent2: #a855f7;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --maxw: 1080px;
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  padding-top: 64px;
}

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

h1, h2, h3, h4, time, #nav .logo {
  font-family: 'Space Grotesk', 'Pretendard', sans-serif;
}

/* ---------- Nav ---------- */
#nav {
  position: fixed; top: 0; width: 100%; z-index: 100;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
#nav .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
#nav .logo {
  font-size: 19px; font-weight: 800; letter-spacing: -0.02em;
  color: var(--text); display: flex; align-items: center; gap: 9px;
}
#nav .logo:hover { text-decoration: none; }
#nav .logo .mark {
  width: 11px; height: 11px; border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 14px var(--accent);
}
#nav .links { display: flex; align-items: center; gap: 4px; }
#nav .links a {
  color: var(--text-dim); font-size: 14px; font-weight: 500;
  padding: 8px 12px; border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
#nav .links a:hover {
  color: var(--text); text-decoration: none;
  background: color-mix(in srgb, var(--text) 8%, transparent);
}
#nav .links a[aria-current="page"] { color: var(--text); }
#nav .links a.nav-cta {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
}

@media (max-width: 640px) {
  #nav .links a:not(.nav-cta):not([aria-current="page"]) { display: none; }
}

/* ---------- Layout ---------- */
main { padding: 48px 20px 0; }
.post, .blog-index { max-width: 720px; margin: 0 auto; overflow-wrap: anywhere; }
.post { line-height: 1.8; }

.meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px;
  color: var(--text-dim); font-size: 14px; margin-top: 12px;
}
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li {
  font-size: 12px; padding: 2px 10px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-dim);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
}
.series-badge {
  font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px;
  color: var(--accent2);
  background: color-mix(in srgb, var(--accent2) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent2) 40%, transparent);
}

/* ---------- Post ---------- */
.post-header h1 { font-size: clamp(26px, 5vw, 38px); line-height: 1.25; letter-spacing: -0.02em; }
.post .cover { margin: 24px 0 0; border-radius: 12px; border: 1px solid var(--border); }
.post-body { margin-top: 32px; }
.post-body > * + * { margin-top: 1.1em; }
.post-body h2 { font-size: 26px; margin-top: 2em; line-height: 1.35; }
.post-body h3 { font-size: 21px; margin-top: 1.6em; line-height: 1.4; }
.post-body h4 { font-size: 18px; margin-top: 1.4em; }
.post-body ul, .post-body ol { padding-left: 1.5em; }
.post-body li + li { margin-top: 0.3em; }
.post-body blockquote {
  padding: 4px 16px; color: var(--text-dim);
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--surface) 60%, transparent);
  border-radius: 0 8px 8px 0;
}
.post-body hr { border: 0; border-top: 1px solid var(--border); margin: 2em 0; }
.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em; padding: 0.1em 0.4em; border-radius: 6px;
  background: var(--surface); border: 1px solid var(--border);
}
pre {
  overflow-x: auto; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px;
  line-height: 1.55; overflow-wrap: normal;
}
pre code { padding: 0; border: 0; background: transparent; font-size: 14px; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; min-width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
th { background: var(--surface); }
img { display: block; width: 100%; height: auto; }
a.md-img { display: block; }
.post-body img { border-radius: 10px; border: 1px solid var(--border); }

/* ---------- Series / navigation ---------- */
.series-toc {
  margin-top: 48px; padding: 18px 20px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border);
}
.series-toc h2 { font-size: 16px; }
.series-toc .series-name { color: var(--text-dim); font-size: 14px; margin: 2px 0 8px; }
.series-toc ol { padding-left: 1.4em; }
.series-toc li[aria-current="page"] { color: var(--text); font-weight: 700; }

.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 32px;
}
.post-nav a {
  display: block; padding: 14px 16px; border-radius: 10px;
  border: 1px solid var(--border); color: var(--text);
  transition: border-color 0.2s;
}
.post-nav a:hover { border-color: var(--accent); text-decoration: none; }
.post-nav .next { grid-column: 2; text-align: right; }
.post-nav .prev { grid-column: 1; }
.back { margin-top: 28px; }

@media (max-width: 520px) {
  .post-nav { grid-template-columns: 1fr; }
  .post-nav .next, .post-nav .prev { grid-column: 1; text-align: left; }
}

/* ---------- Index ---------- */
.blog-index h1 { font-size: clamp(28px, 6vw, 40px); letter-spacing: -0.02em; }
.blog-index .lead { color: var(--text-dim); margin-top: 8px; }
.blog-index h2 { font-size: 20px; margin: 40px 0 14px; }
.series-group { margin-bottom: 18px; }
.series-group h3 { font-size: 17px; color: var(--accent2); }
.series-group ol { padding-left: 1.4em; }
.series-group time { color: var(--text-dim); font-size: 13px; margin-left: 6px; }
.post-list > ul { list-style: none; display: grid; gap: 14px; }
.post-item {
  padding: 18px 20px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.post-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.post-link { color: var(--text); }
.post-link:hover { text-decoration: none; }
.post-item h3 { font-size: 20px; line-height: 1.4; }
.post-item .summary { margin-top: 10px; color: var(--text-dim); }

/* ---------- Footer ---------- */
footer {
  text-align: center; padding: 48px 24px;
  color: var(--text-dim); font-size: 13px;
  border-top: 1px solid var(--border); margin-top: 90px;
}