/* =========================================================
   Leehosang Lab — 블로그 화면 (포트폴리오 메인과 같은 색 · 글꼴)
   글 본문은 읽기 편하게: Noto Sans KR 17px · 행간 1.85 · 단어 단위 줄바꿈
   코드는 한글 폭이 영문의 정확히 2배인 Nanum Gothic Coding (그림 칸 맞춤)
   시그니처: 글 끝 "배운 것" 을 Takeaways 패널로
   ========================================================= */

:root {
  --lab-bg: #07090f;
  --lab-panel: #0d1117;
  --lab-surface: #161b27;
  --lab-surface-2: #1e2535;
  --lab-line: rgba(255, 255, 255, 0.08);
  --lab-text: #cfd5e1;
  --lab-strong: #eef1f7;
  --lab-muted: #8892a4;
  --lab-accent: #6c63ff;
  --lab-accent-2: #a78bfa;
  --lab-cyan: #38bdf8;
  --lab-green: #34d399;
  --lab-sans: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --lab-display: 'Space Grotesk', 'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;
  --lab-mono: 'Nanum Gothic Coding', 'D2Coding', Consolas, monospace;
}

/* ---------- 바탕 ---------- */
html { font-size: 100%; }
body {
  background: var(--lab-bg);
  color: var(--lab-text);
  font-family: var(--lab-sans);
  font-size: 1.0625rem;
  line-height: 1.85;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--lab-display);
  color: var(--lab-strong);
  word-break: keep-all;
}
a { color: var(--lab-accent-2); }
a:hover, a:focus { color: var(--lab-strong); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--lab-accent-2);
  outline-offset: 3px;
  border-radius: 4px;
}
::selection { background: rgba(108, 99, 255, 0.45); color: #fff; }

/* ---------- 상단 메뉴 · 바닥글 ---------- */
.navbar-custom {
  font-family: var(--lab-display);
  background: rgba(7, 9, 15, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--lab-line);
}
.navbar-custom .navbar-brand { letter-spacing: 0.04em; font-weight: 700; }
.navbar-custom .nav-link { font-size: 0.86rem; letter-spacing: 0.02em; }
.navbar-custom .dropdown-menu { background: var(--lab-panel); border: 1px solid var(--lab-line); }
.navbar-custom .dropdown-item { color: var(--lab-text); }
.navbar-custom .dropdown-item:hover { background: var(--lab-surface); color: var(--lab-strong); }
footer { font-family: var(--lab-sans); border-top: 1px solid var(--lab-line); }

/* ---------- 글 머리 (제목 · 날짜) ---------- */
.intro-header.no-img { margin-top: 96px; margin-bottom: 8px; }
.intro-header .post-heading,
.intro-header .page-heading { text-align: left; padding: 24px 0 8px; }
.intro-header .post-heading h1,
.intro-header .page-heading h1 {
  font-family: var(--lab-display);
  font-size: clamp(1.85rem, 4.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.03em;
  color: var(--lab-strong);
  margin: 0 0 18px;
}
.intro-header .page-heading h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); }
.intro-header .post-heading .post-subheading,
.intro-header .page-heading .page-subheading {
  font-family: var(--lab-sans);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--lab-muted);
  line-height: 1.7;
}
.intro-header hr.small {
  border: 0;
  width: 48px;
  height: 2px;
  margin: 16px 0;
  background: var(--lab-accent);
  max-width: none;
}
.intro-header .post-meta {
  font-family: var(--lab-mono);
  font-size: 0.82rem;
  color: var(--lab-muted);
  letter-spacing: 0.02em;
  font-style: normal;
}

/* ---------- 본문 ---------- */
.blog-post,
.content {
  background: transparent;
  box-shadow: none;
  padding: 0;
  font-size: 1.0625rem;
  line-height: 1.85;
}
.blog-post p,
.content p { margin: 0 0 1.35em; }
.blog-post strong,
.content strong { color: var(--lab-strong); font-weight: 700; }
.blog-post h2,
.content h2 {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin: 3.2rem 0 1.1rem;
}
.blog-post h3,
.content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.45;
  margin: 2.2rem 0 0.8rem;
  color: var(--lab-strong);
}
.blog-post h2 + h3 { margin-top: 1.2rem; }
.blog-post a,
.content a {
  color: var(--lab-accent-2);
  text-decoration: underline;
  text-decoration-color: rgba(167, 139, 250, 0.4);
  text-underline-offset: 3px;
}
.blog-post a:hover,
.content a:hover { color: var(--lab-strong); text-decoration-color: var(--lab-strong); }

.blog-post ul, .blog-post ol,
.content ul, .content ol { padding-left: 1.4rem; margin: 0 0 1.4em; }
.blog-post li,
.content li { margin: 0.35rem 0; }
.blog-post li::marker,
.content li::marker { color: var(--lab-accent); }
.blog-post img,
.content img { max-width: 100%; border-radius: 12px; }

/* 구분선 — 두꺼운 회색 막대 대신 얇은 선 */
.blog-post hr,
.content hr {
  border: 0;
  width: 100%;
  max-width: none;
  height: 1px;
  background: var(--lab-line);
  margin: 2.8rem 0;
}

/* 인용 */
.blog-post blockquote,
.content blockquote {
  margin: 1.6em 0;
  padding: 0.9rem 1.2rem;
  border-left: 3px solid var(--lab-accent);
  background: rgba(108, 99, 255, 0.07);
  border-radius: 0 12px 12px 0;
  color: var(--lab-text);
  font-style: normal;
  font-size: 1rem;
}
.blog-post blockquote p:last-child,
.content blockquote p:last-child { margin-bottom: 0; }

/* 표 */
.blog-post table,
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.94rem;
  line-height: 1.6;
  border: 1px solid var(--lab-line);
  border-radius: 12px;
  overflow: hidden;
}
.blog-post th, .blog-post td,
.content th, .content td {
  padding: 0.65rem 0.9rem;
  border: 0;
  border-bottom: 1px solid var(--lab-line);
  text-align: left;
  vertical-align: top;
}
.blog-post th,
.content th {
  background: var(--lab-surface);
  color: var(--lab-strong);
  font-family: var(--lab-display);
  font-weight: 600;
}
.blog-post table tr,
.content table tr { background: transparent; border: 0; }
.blog-post table tr:nth-child(2n),
.content table tr:nth-child(2n) { background: rgba(255, 255, 255, 0.02); }
.blog-post tr:last-child td,
.content tr:last-child td { border-bottom: 0; }

/* 인라인 코드 */
.blog-post code,
.content code {
  font-family: var(--lab-mono);
  font-size: 0.88em;
  color: #d9ccff;
  background: rgba(167, 139, 250, 0.12);
  border: 0;
  border-radius: 6px;
  padding: 0.12em 0.42em;
  word-break: break-all;
}

/* 코드 블록 */
.blog-post pre,
.content pre,
.highlight pre {
  font-family: var(--lab-mono);
  font-size: 0.86rem;
  line-height: 1.7;
  color: #d5dbe7;
  background: #11161f;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 0;
  overflow-x: auto;
  white-space: pre;
  word-break: normal;
  word-wrap: normal;
  tab-size: 4;
}
.blog-post pre code,
.content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  word-break: normal;
}
.blog-post div.highlighter-rouge,
.blog-post figure.highlight,
.content div.highlighter-rouge { margin: 1.5em 0; }
div.highlight,
.blog-post div.highlight { background: transparent; border: 0; }

/* 코드 색 (Rouge / Pygments 클래스) */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .cp { color: #6b7590; font-style: normal; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .kc { color: #c4a7ff; font-weight: 400; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx { color: #86e1b9; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il { color: #f7a8b8; }
.highlight .nf, .highlight .fm, .highlight .nt { color: #7cc4ff; }
.highlight .nd, .highlight .na, .highlight .nb { color: #f5c07a; }
.highlight .nc, .highlight .nn, .highlight .no { color: #eef1f7; }
.highlight .o, .highlight .ow, .highlight .p, .highlight .n, .highlight .nv, .highlight .w { color: #d5dbe7; }
.highlight .err { color: #ff8a8a; background: transparent; }
.highlight .gd { color: #ff8a8a; background: rgba(255, 138, 138, 0.08); }
.highlight .gi { color: #86e1b9; background: rgba(134, 225, 185, 0.08); }

/* ---------- 시그니처: 글 끝 "배운 것" ---------- */
.blog-post > h2:last-of-type {
  position: relative;
  margin-top: 3.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--lab-line);
}
.blog-post > h2:last-of-type::before {
  content: 'TAKEAWAYS';
  display: block;
  font-family: var(--lab-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--lab-accent-2);
  margin-bottom: 0.5rem;
}
.blog-post > h2:last-of-type ~ ul {
  list-style: none;
  padding: 1.2rem 1.4rem;
  margin-top: 0.4rem;
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.13), rgba(56, 189, 248, 0.05));
  border: 1px solid rgba(108, 99, 255, 0.3);
  border-radius: 16px;
}
.blog-post > h2:last-of-type ~ ul > li {
  position: relative;
  padding-left: 1.6rem;
  margin: 0.55rem 0;
}
.blog-post > h2:last-of-type ~ ul > li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--lab-accent-2);
  font-family: var(--lab-display);
}

/* ---------- 태그 · 이전/다음 글 ---------- */
.blog-tags {
  margin: 2.6rem 0 1.4rem;
  font-family: var(--lab-mono);
  font-size: 0.8rem;
  color: var(--lab-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.blog-tags > span { margin-right: 4px; }
.blog-tags a,
.post-card .tag {
  font-family: var(--lab-mono);
  font-size: 0.76rem;
  color: var(--lab-text);
  background: var(--lab-surface-2);
  border: 1px solid var(--lab-line);
  border-radius: 999px;
  padding: 3px 11px;
  text-decoration: none;
}
.blog-tags a::before,
.post-card .tag::before { content: '#'; color: var(--lab-accent-2); margin-right: 2px; }
.blog-tags a:hover,
.post-card .tag:hover { border-color: var(--lab-accent); color: var(--lab-strong); }

.blog-pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 2rem 0 3rem;
}
.blog-pager .page-item.next { margin-left: auto; }
.blog-pager .page-link,
.pagination-nav .pagination-link {
  display: inline-block;
  font-family: var(--lab-display);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--lab-text);
  background: var(--lab-surface);
  border: 1px solid var(--lab-line);
  border-radius: 999px;
  padding: 10px 20px;
  text-decoration: none;
}
.blog-pager .page-link:hover,
.pagination-nav .pagination-link:hover {
  color: #fff;
  background: var(--lab-accent);
  border-color: var(--lab-accent);
}

/* ---------- 글 목록 (블로그 첫 화면) ---------- */
.posts-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 1.5rem 0 2rem;
}
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--lab-panel);
  border: 1px solid var(--lab-line);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.post-card:hover { transform: translateY(-4px); border-color: rgba(108, 99, 255, 0.45); }
.post-card .post-image { height: 180px; overflow: hidden; }
.post-card .post-thumbnail { width: 100%; height: 100%; object-fit: cover; }
.post-card .post-content { padding: 22px 22px 20px; display: flex; flex-direction: column; flex: 1; }
.post-card .post-link { text-decoration: none; color: inherit; }
.post-card .post-title {
  font-family: var(--lab-display);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.015em;
  color: var(--lab-strong);
  margin: 0 0 12px;
}
.post-card .post-link:hover .post-title { color: var(--lab-accent-2); }
.post-card .post-subtitle { font-size: 0.92rem; color: var(--lab-muted); margin: 0 0 10px; }
.post-card .post-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--lab-mono);
  font-size: 0.78rem;
  color: var(--lab-muted);
}
.post-card .post-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.post-card .post-excerpt {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--lab-muted);
  margin-top: auto;
}
.post-card .read-more-link {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--lab-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--lab-accent-2);
  text-decoration: none;
}
.post-card .read-more-link::after { content: ' →'; }
.pagination-nav { display: flex; justify-content: space-between; margin: 1rem 0 3rem; }
.pagination-nav .next { margin-left: auto; }

/* ---------- 작은 화면 ---------- */
@media (max-width: 640px) {
  body, .blog-post, .content { font-size: 1rem; line-height: 1.8; }
  .intro-header.no-img { margin-top: 80px; }
  .blog-post h2, .content h2 { font-size: 1.32rem; margin-top: 2.6rem; }
  .blog-post pre, .content pre { font-size: 0.8rem; padding: 14px 16px; }
  .blog-post table, .content table { display: block; overflow-x: auto; white-space: nowrap; }
  .blog-post > h2:last-of-type ~ ul { padding: 1rem 1.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .post-card, .post-card:hover { transition: none; transform: none; }
}