@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css");

:root {
  --bg: #fafafa;
  --fg: #171717;
  --muted: #737373;
  --border: #e5e5e5;
  --accent: #2563eb;
  --code-bg: #f4f4f5;
  --pre-bg: #1e1e1e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --fg: #fafafa;
    --muted: #a3a3a3;
    --border: #262626;
    --accent: #60a5fa;
    --code-bg: #18181b;
    --pre-bg: #0c0c0c;
  }
}

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

html, body {
  font: 16px/1.8 Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, kbd { font-family: ui-monospace, "JetBrains Mono", SFMono-Regular, Menlo, monospace; }

.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
}
.topbar-inner {
  max-width: 720px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 24px;
}
.logo { display: inline-flex; align-items: center; color: var(--fg); }
.logo:hover { text-decoration: none; opacity: 0.85; }
.logo svg { display: block; }
.nav { display: flex; gap: 20px; flex: 1; }
.nav a {
  color: var(--fg); font-size: 14px; padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--accent); text-decoration: none; }
.nav a.active { color: var(--accent); border-bottom-color: var(--accent); }
#search-toggle {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 4px;
  padding: 4px 8px; font-size: 11px; cursor: pointer; color: var(--muted);
  font-family: ui-monospace, monospace;
}
#search-toggle:hover { color: var(--accent); border-color: var(--accent); }

.container { max-width: 720px; margin: 0 auto; padding: 48px 24px 80px; }

.intro {
  padding: 60px 0 48px; text-align: center;
  border-bottom: 1px solid var(--border); margin-bottom: 48px;
}
.intro h1 { font-size: 32px; font-family: ui-monospace, monospace; margin-bottom: 14px; }
.intro p { color: var(--muted); max-width: 500px; margin: 0 auto; font-size: 15px; }

.series-section { margin-bottom: 48px; }
.posts-section h2, .series-section h2, .home-section {
  font-size: 13px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--muted); margin-bottom: 20px; font-weight: 600;
}

.series-cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px;
}
.series-card {
  display: block; padding: 18px; border: 1px solid var(--border); border-radius: 8px;
  color: var(--fg); transition: border-color 0.15s;
}
.series-card:hover { border-color: var(--accent); text-decoration: none; }
.series-card h3 { margin-bottom: 6px; font-size: 15px; }
.series-count { font-size: 12px; color: var(--muted); }

.post-list { display: flex; flex-direction: column; }
.post-card { padding: 24px 0; border-bottom: 1px solid var(--border); }
.post-card:last-child { border-bottom: none; }
.card-meta {
  display: flex; gap: 12px; font-size: 12px; color: var(--muted);
  margin-bottom: 10px; align-items: center; flex-wrap: wrap;
}
.card-cat { color: var(--accent); font-weight: 500; }
.card-cat:hover { text-decoration: underline; }
.card-series { padding: 2px 8px; border: 1px solid var(--border); border-radius: 3px; }
.post-card h3 { font-size: 20px; margin-bottom: 8px; line-height: 1.4; }
.post-card h3 a { color: var(--fg); }
.post-card h3 a:hover { color: var(--accent); text-decoration: none; }
.post-card p { margin: 0; }
.post-card p a { color: var(--muted); font-size: 14px; line-height: 1.6; }
.post-card p a:hover { text-decoration: none; }

article h1 { font-size: 30px; line-height: 1.3; margin-bottom: 18px; }
article h2 {
  font-size: 22px; margin-top: 48px; margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
article h3 { font-size: 18px; margin-top: 32px; margin-bottom: 12px; }
article p { margin: 18px 0; }
article ul, article ol { margin: 18px 0; padding-left: 24px; }
article li { margin: 4px 0; }
article code { background: var(--code-bg); padding: 1px 6px; border-radius: 3px; font-size: 0.88em; }
article pre {
  background: var(--pre-bg); color: #d4d4d4; padding: 16px 20px;
  border-radius: 6px; overflow-x: auto; margin: 20px 0; font-size: 0.85em;
}
article pre code { background: none; padding: 0; color: inherit; }
article blockquote {
  border-left: 3px solid var(--accent); padding: 4px 16px;
  margin: 20px 0; color: var(--muted);
}
article table {
  width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px;
}
article th, article td {
  border: 1px solid var(--border); padding: 10px 14px;
  text-align: left; vertical-align: top;
}
article th { background: var(--code-bg); }
article hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }
article img {
  max-width: 100%; height: auto; border-radius: 6px;
  margin: 24px auto; display: block;
}
article em {
  font-style: normal; color: var(--fg);
  border-bottom: 1px dotted var(--muted); padding-bottom: 1px;
}
article strong { font-weight: 600; }

.post-header { margin-bottom: 32px; }
.post-meta {
  display: flex; gap: 12px; font-size: 13px; color: var(--muted);
  align-items: center; flex-wrap: wrap;
}
.cat-link {
  padding: 3px 10px; background: var(--code-bg); border-radius: 4px; color: var(--accent);
}
.series-link {
  padding: 3px 10px; border: 1px solid var(--border); border-radius: 4px; color: var(--muted);
}

.callout {
  margin: 24px 0; padding: 16px 20px;
  border-left: 4px solid var(--accent);
  background: var(--code-bg); border-radius: 0 6px 6px 0;
}
.callout-title { font-weight: 600; margin-bottom: 8px; font-size: 14px; }
.callout-body > :first-child { margin-top: 0; }
.callout-body > :last-child { margin-bottom: 0; }
.callout-intro .callout-title::before { content: "📝 "; }
.callout-takeaway .callout-title::before { content: "💡 "; }

pre.mermaid {
  background: var(--code-bg); padding: 24px;
  text-align: center; border-radius: 6px; color: inherit; margin: 24px 0;
}

.wikilink { border-bottom: 1px dashed currentColor; }
.wikilink-broken { color: #b91c1c; cursor: not-allowed; }

.page-tags {
  margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 8px;
}
.tag-chip {
  background: var(--code-bg); border: 1px solid var(--border);
  color: var(--fg); padding: 4px 12px; border-radius: 999px;
  font-size: 12px; cursor: pointer; font-family: inherit;
}
.tag-chip:hover { border-color: var(--accent); color: var(--accent); }

.read-time::before { content: "·"; margin: 0 6px; color: var(--muted); }
.toc {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 18px; margin: 0 0 28px; font-size: 14px;
}
.toc-title { font-weight: 600; margin-bottom: 8px; color: var(--muted); font-size: 13px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 4px 0; }
.toc li.toc-h3 { padding-left: 16px; }
.toc a { color: var(--fg); text-decoration: none; }
.toc a:hover { color: var(--accent); text-decoration: underline; }
.prev-next { display: flex; gap: 12px; margin: 40px 0 0; }
.prev-next .pn-item {
  flex: 1; display: flex; flex-direction: column; gap: 4px;
  border: 1px solid var(--border); border-radius: 8px; padding: 14px 16px; text-decoration: none;
}
.prev-next .pn-item:hover { border-color: var(--accent); }
.prev-next .pn-next { text-align: right; }
.pn-label { font-size: 12px; color: var(--muted); }
.pn-title { font-size: 14px; color: var(--fg); font-weight: 600; }
.related { margin: 48px 0 0; }
.related h2 { font-size: 16px; margin: 0 0 14px; }
.related .rel-card {
  display: block; border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 16px; margin: 8px 0; text-decoration: none; color: var(--fg); font-weight: 500;
}
.related .rel-card:hover { border-color: var(--accent); color: var(--accent); }

.about > p { margin: 16px 0; }
.tech-stack { margin: 18px 0 8px; display: flex; flex-direction: column; gap: 14px; }
.tech-group { display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
.tech-label {
  font-size: 13px; color: var(--muted); font-weight: 600;
  min-width: 96px; flex-shrink: 0;
}
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; flex: 1; }
.tech-tag {
  background: var(--code-bg); border: 1px solid var(--border); color: var(--fg);
  padding: 4px 12px; border-radius: 999px; font-size: 13px; line-height: 1.6;
}
.tech-tag-accent {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: var(--accent); color: var(--accent); font-weight: 500;
}
.about-contact { list-style: none; padding-left: 0; }
.about-contact li { margin: 6px 0; }

@media (max-width: 600px) {
  .tech-group { gap: 4px; }
  .tech-label { min-width: 100%; }
  .prev-next { flex-direction: column; }
}

.series-list-items { list-style: none; padding: 0; }
.series-item { margin: 0 0 16px; }
.series-item a {
  display: block; padding: 18px 22px; border: 1px solid var(--border);
  border-radius: 8px; color: var(--fg);
}
.series-item a:hover { border-color: var(--accent); text-decoration: none; }
.series-item h3 { margin-bottom: 6px; font-size: 16px; }

.series-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px;
}
.series-card-large {
  display: block; padding: 22px; border: 1px solid var(--border);
  border-radius: 8px; color: var(--fg);
}
.series-card-large:hover { border-color: var(--accent); text-decoration: none; }
.series-card-large h3 { margin-bottom: 6px; font-size: 17px; }
.series-card-large p { font-size: 13px; color: var(--muted); margin: 0; }

.post-backlink {
  padding: 32px 0 0;
}
.post-backlink a { font-size: 14px; color: var(--muted); }
.post-backlink a:hover { color: var(--accent); }

.series-nav {
  padding: 32px 0 0;
}
.seriesnav-head {
  font-size: 13px; color: var(--muted); margin-bottom: 12px;
  padding-top: 32px; border-top: 1px solid var(--border);
}
.seriesnav-links { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.seriesnav-item {
  display: flex; flex-direction: column; gap: 4px; padding: 16px 18px;
  border: 1px solid var(--border); border-radius: 8px; color: var(--fg);
}
a.seriesnav-item:hover { border-color: var(--accent); text-decoration: none; }
a.seriesnav-item:hover .seriesnav-title { color: var(--accent); }
.seriesnav-next { text-align: right; }
.seriesnav-label { font-size: 12px; color: var(--muted); }
.seriesnav-title { font-size: 14px; font-weight: 600; line-height: 1.4; }
.seriesnav-empty { border: none; }

@media (max-width: 600px) {
  .seriesnav-links { grid-template-columns: 1fr; }
  .seriesnav-next { text-align: left; }
}

.comments {
  padding: 0 0 40px;
}
.comments::before {
  content: "댓글"; display: block; font-size: 13px; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--muted); font-weight: 600;
  margin-bottom: 20px; padding-top: 40px; border-top: 1px solid var(--border);
}

.muted { color: var(--muted); font-size: 13px; }

.footer {
  border-top: 1px solid var(--border); margin-top: 80px; padding: 24px 0;
}
.footer-inner {
  max-width: 720px; margin: 0 auto; padding: 0 24px;
  text-align: center; font-size: 13px; color: var(--muted);
}

#search-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 99;
}
#search-backdrop.hidden { display: none; }
#search-modal {
  position: fixed; top: 80px; left: 50%; transform: translateX(-50%);
  width: 92%; max-width: 600px; max-height: 70vh; overflow: hidden;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,.18); z-index: 100;
  display: flex; flex-direction: column;
}
#search-modal.hidden { display: none; }
#search-input {
  width: 100%; padding: 16px 20px; border: none;
  border-bottom: 1px solid var(--border); background: var(--bg);
  color: var(--fg); font-size: 15px; outline: none; font-family: inherit;
}
#search-output { overflow-y: auto; max-height: 60vh; }
#search-output .result {
  display: block; padding: 14px 20px; border-bottom: 1px solid var(--border); color: var(--fg);
}
#search-output .result:last-child { border-bottom: none; }
#search-output .result:hover { background: var(--code-bg); text-decoration: none; }
#search-output .result-title { font-weight: 600; }
#search-output .result-meta { font-size: 12px; color: var(--muted); margin-top: 4px; }
#search-output .result-snippet {
  font-size: 13px; color: var(--muted); margin-top: 6px; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
#search-output .empty { padding: 24px; color: var(--muted); text-align: center; }
mark { background: rgba(37, 99, 235, 0.2); color: inherit; padding: 0 2px; border-radius: 2px; }

@media (max-width: 600px) {
  .topbar-inner { padding: 10px 16px; gap: 14px; }
  .nav {
    gap: 14px; min-width: 0; overflow-x: auto;
    scrollbar-width: none; -ms-overflow-style: none; -webkit-overflow-scrolling: touch;
  }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { font-size: 13px; white-space: nowrap; flex: 0 0 auto; }
  .container { padding: 32px 16px 60px; }
  .intro { padding: 32px 0 28px; }
  .intro h1 { font-size: 26px; }
  article h1 { font-size: 24px; }
  article h2 { font-size: 19px; }
}