@font-face {
  font-family: D2Coding;
  src: url('../fonts/D2Coding-Regular.ttf') format('truetype');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  --yb-paper: #fff;
  --yb-ink: #20242a;
  --yb-text: #393f47;
  --yb-muted: #707780;
  --yb-line: #e5e8eb;
  --yb-link: #2766a4;
  --yb-soft: #f7f9fa;
  --yb-radius: 8px;
  --yb-content-width: 880px;
  --yb-font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Apple SD Gothic Neo", "Malgun Gothic", "맑은 고딕", 나눔고딕, "Nanum Gothic", "Noto Sans KR", "Noto Sans CJK KR", arial, 돋움, Dotum, Tahoma, Geneva, sans-serif;
  --yb-code-font: D2Coding, "SFMono-Regular", Consolas, monospace;
  --yb-code-bg: #282a36;
  --yb-code-fg: #f8f8f2;
  --yb-code-comment: #6272a4;
  --yb-code-pink: #ff79c6;
  --yb-code-green: #50fa7b;
  --yb-code-yellow: #f1fa8c;
  --yb-code-orange: #ffb86c;
  --yb-code-purple: #bd93f9;
  --yb-code-cyan: #8be9fd;
  --yb-code-red: #ff5555;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--yb-paper); color: var(--yb-text); font-family: var(--yb-font); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
button, input, select { font: inherit; }
a { color: var(--yb-link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--yb-link); outline-offset: 3px; }
[hidden] { display: none !important; }
.site-container { width: min(calc(100% - 48px), var(--yb-content-width)); margin-inline: auto; }
.skip-link { position: absolute; left: 16px; top: -100px; background: var(--yb-paper); padding: 8px 12px; z-index: 10; }
.skip-link:focus { top: 8px; }

.site-header { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-block: 24px 20px; border-bottom: 1px solid var(--yb-line); }
.site-brand { color: var(--yb-ink); font-size: 18px; font-weight: 700; letter-spacing: -.03em; text-decoration: none; }
.site-nav { display: flex; gap: 24px; }
.site-nav a { color: var(--yb-muted); padding-block: 6px; font-size: 14px; font-weight: 500; text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--yb-ink); border-bottom: 1px solid var(--yb-ink); }
.site-footer { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; border-top: 1px solid var(--yb-line); padding-block: 24px 40px; color: var(--yb-muted); font-size: 12px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { text-decoration: none; }

.home-intro { padding: 76px 0 20px; }
.home-intro h1 { margin: 0 0 12px; color: var(--yb-ink); font-size: clamp(28px, 4vw, 34px); line-height: 1.35; letter-spacing: -.04em; }
.home-intro p { max-width: 690px; margin: 0 0 22px; color: #505760; line-height: 1.8; word-break: keep-all; }
.intro-links { display: flex; gap: 22px; }
.intro-links a { font-size: 14px; font-weight: 500; text-decoration: none; }
.home-section { padding: 44px 0 20px; }
.home-section:last-child { padding-bottom: 64px; }
.home-section h2, .section-heading h2 { margin: 0 0 18px; color: var(--yb-muted); font-size: 13px; font-weight: 600; line-height: 1.4; letter-spacing: .025em; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; }
.section-heading a { font-size: 13px; text-decoration: none; }
.selected-row + .selected-row { border-top: 1px solid var(--yb-line); }
.selected-main, .post-row-main { display: grid; grid-template-columns: minmax(0, 1fr); align-items: center; gap: 16px; min-width: 0; color: inherit; text-decoration: none; }
.post-row-main.has-thumbnail { grid-template-columns: 132px minmax(0, 1fr); }
.selected-main { grid-template-columns: minmax(0, 1fr) 24px; padding: 20px 0; }
.selected-main.has-thumbnail { grid-template-columns: 132px minmax(0, 1fr) 24px; }
.selected-copy, .post-row-copy { min-width: 0; }
.selected-source { display: block; margin-top: 6px; color: var(--yb-muted); font-size: 12px; overflow-wrap: anywhere; }
.selected-copy h3, .selected-copy p { overflow-wrap: anywhere; }
.post-thumbnail { display: block; width: 132px; height: 92px; overflow: hidden; border: 1px solid var(--yb-line); border-radius: var(--yb-radius); background: var(--yb-soft); }
.post-thumbnail img { display: block; width: 100%; height: 100%; object-fit: contain; }
.post-thumbnail.is-favicon { display: flex; align-items: center; justify-content: center; }
.post-thumbnail.is-favicon img { width: 42px; height: 42px; }
#all-posts .post-row-main.has-thumbnail { grid-template-columns: 160px minmax(0, 1fr); }
#all-posts .post-thumbnail { width: 160px; height: 112px; }
.selected-row h3, .post-row h2, .post-row h3 { margin: 0 0 4px; color: var(--yb-ink); font-size: 16px; line-height: 1.5; }
.selected-row h3 { font-size: 20px; letter-spacing: -.025em; line-height: 1.45; }
.home-section .post-row:first-child { border-top: 0; }
.post-row-copy { overflow-wrap: anywhere; }
.post-source { display: block; margin-top: 6px; color: var(--yb-muted); font-size: 12px; }
.external-arrow { color: var(--yb-muted); font-size: .8em; font-weight: 400; white-space: nowrap; }
.selected-main:hover h3, .post-row-main:hover h2, .post-row-main:hover h3 { color: var(--yb-link); }
.selected-row p, .post-row p { margin: 0; color: var(--yb-muted); font-size: 13px; line-height: 1.6; }
.selected-row p { max-width: 640px; font-size: 14px; line-height: 1.75; }
.row-arrow { color: var(--yb-muted); text-align: right; }
.selected-main:hover .row-arrow, .selected-main:focus-visible .row-arrow { color: var(--yb-link); }
.post-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px; align-items: center; border-top: 1px solid var(--yb-line); padding: 18px 0; }
.post-row time { color: var(--yb-muted); font-size: 12px; white-space: nowrap; }
.post-tags { display: block; margin-top: 6px; color: var(--yb-muted); font-size: 12px; }

.page-heading { padding: 65px 0 24px; border-bottom: 1px solid var(--yb-line); }
.page-heading h1 { color: var(--yb-ink); font-size: 30px; line-height: 1.35; margin: 0 0 8px; }
.page-heading p { margin: 0; color: var(--yb-muted); }
.search-area { margin: 26px 0 15px; }
.search-controls { display: flex; align-items: end; gap: 16px; }
.search-field { flex: 1; min-width: 0; }
.topic-field { width: 180px; }
.search-area label { display: block; margin-bottom: 7px; color: var(--yb-ink); font-size: 13px; font-weight: 600; }
.search-area input, .search-area select { width: 100%; min-height: 48px; padding: 11px 13px; border: 1px solid #dce3ed; border-radius: var(--yb-radius); background: var(--yb-paper); color: var(--yb-ink); font-size: 16px; }
.clear-filters { min-height: 48px; padding: 8px 0; border: 0; background: transparent; color: var(--yb-link); font-size: 13px; cursor: pointer; }
.clear-filters:disabled { color: var(--yb-muted); opacity: .6; cursor: default; }
.search-area [role="status"] { min-height: 20px; margin: 5px 0 0; color: var(--yb-muted); font-size: 12px; }
.posts-empty { padding: 24px 0; color: var(--yb-muted); font-size: 14px; }
.posts-empty p { margin: 0; }
#all-posts { padding-bottom: 70px; }

.article-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 42px; padding: 52px 0 80px; }
.article-grid.has-toc { grid-template-columns: minmax(0, 1fr) 165px; }
.article { min-width: 0; }
.article-grid:not(.has-toc) .article { width: 100%; max-width: 680px; margin-inline: auto; }
.back-link { font-size: 14px; text-decoration: none; }
.article-category { margin: 30px 0 10px; color: var(--yb-link); font-size: 13px; font-weight: 600; }
.article h1 { color: var(--yb-ink); font-size: clamp(28px, 4vw, 34px); line-height: 1.35; letter-spacing: -.035em; margin: 0 0 15px; word-break: keep-all; }
.article-meta { display: flex; gap: 6px; flex-wrap: wrap; padding-bottom: 24px; margin-bottom: 36px; border-bottom: 1px solid var(--yb-line); color: var(--yb-muted); font-size: 13px; }
.article-body { overflow-wrap: break-word; word-break: keep-all; }
.article-body h2, .article-body h3 { color: var(--yb-ink); line-height: 1.4; letter-spacing: -.025em; scroll-margin-top: 24px; }
.article-body h2 { margin: 44px 0 15px; font-size: 24px; }
.article-body h3 { margin: 31px 0 12px; font-size: 19px; }
.article-body p, .article-body li { font-size: 16px; line-height: 1.82; }
.article-body p { margin: 0 0 19px; }
.article-body ul, .article-body ol { padding-left: 23px; margin: 0 0 23px; }
.article-body li { padding-left: 3px; margin-bottom: 7px; }
.article-body li::marker { color: var(--yb-muted); }
.article-body img { display: block; max-width: 100%; height: auto; margin: 24px auto; border-radius: 4px; }
.article-body figure { margin: 24px 0; }
.video-embed { position: relative; width: 100%; padding-top: 56.25%; margin: 24px 0; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; border-radius: var(--yb-radius); }
.mermaid { margin: 24px 0; overflow-x: auto; text-align: center; }
.mermaid svg { max-width: 100%; height: auto; }
.article-body figcaption { color: var(--yb-muted); font-size: 13px; text-align: center; }
.article-body blockquote { margin: 24px 0; padding-left: 17px; border-left: 2px solid var(--yb-line); color: var(--yb-muted); }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-body th, .article-body td { border-bottom: 1px solid var(--yb-line); padding: 10px 12px; text-align: left; }
.article-body th { color: var(--yb-ink); border-top: 1px solid var(--yb-line); }
.article-body .table-wrapper { overflow-x: auto; }
.article-body :not(pre) > code { padding: 1px 4px; border-radius: 3px; background: #f5f6f7; color: #a84736; font-family: var(--yb-code-font); font-size: .88em; word-break: break-word; }
.article-body pre { margin: 0; padding: 20px 22px; overflow-x: auto; background: var(--yb-code-bg); color: var(--yb-code-fg); border-radius: var(--yb-radius); font: 14px/1.7 var(--yb-code-font); word-break: normal; }
.article-body pre code { font: inherit; background: transparent; color: inherit; }
.code-frame { position: relative; margin: 22px 0 27px; }
.code-frame pre { padding-top: 50px; }
.code-caption { position: absolute; left: 22px; top: 13px; color: #aeb3c9; font: 12px var(--yb-code-font); }
.copy-code { position: absolute; right: 17px; top: 8px; padding: 4px 7px; border: 0; background: transparent; color: #d2d5e2; font-size: 12px; cursor: pointer; }
.copy-code:hover { color: var(--yb-code-fg); }
.highlight { background: var(--yb-code-bg); }
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cp, .highlight .cs { color: var(--yb-code-comment); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .o, .highlight .ow { color: var(--yb-code-pink); }
.highlight .nf, .highlight .fm, .highlight .nb { color: var(--yb-code-green); }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sa, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sr, .highlight .ss { color: var(--yb-code-yellow); }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il, .highlight .kc { color: var(--yb-code-orange); }
.highlight .nc, .highlight .nn, .highlight .nt, .highlight .na { color: var(--yb-code-cyan); }
.highlight .bp, .highlight .vc, .highlight .vg, .highlight .vi { color: var(--yb-code-purple); }
.highlight .err, .highlight .gd { color: var(--yb-code-red); }
.toc { position: sticky; top: 24px; align-self: start; max-height: calc(100vh - 48px); overflow-y: auto; border-left: 1px solid var(--yb-line); padding-left: 18px; color: var(--yb-muted); font-size: 13px; overflow-wrap: anywhere; }
.toc summary { margin-bottom: 16px; color: var(--yb-ink); font-weight: 600; cursor: pointer; }
.toc a { display: block; margin-bottom: 12px; color: inherit; line-height: 1.5; text-decoration: none; }
.toc a[data-level="3"] { padding-left: 12px; }
.toc a:hover, .toc a[aria-current="location"] { color: var(--yb-link); }
.toc a[aria-current="location"] { font-weight: 600; }
.article-next { margin-top: 52px; padding-top: 28px; border-top: 1px solid var(--yb-line); }
.post-navigation { margin-bottom: 24px; }
.post-navigation section + section { margin-top: 24px; }
.post-navigation h2 { margin: 0 0 8px; color: var(--yb-ink); font-size: 18px; }
.post-navigation .post-row { border-top: 0; }
.comments { margin-top: 50px; padding-top: 25px; border-top: 1px solid var(--yb-line); }
.comments h2 { color: var(--yb-ink); font-size: 23px; }

.standard-page, .about-page { padding-bottom: 80px; }
.about-heading { display: flex; justify-content: space-between; gap: 30px; padding: 50px 0 38px; border-bottom: 1px solid var(--yb-line); }
.about-heading h1 { display: inline; color: var(--yb-ink); font-size: 30px; letter-spacing: -.035em; }
.about-heading span { margin-left: 12px; color: var(--yb-muted); font-size: 14px; }
.about-heading p { margin: 13px 0 0; font-size: 15px; }
.about-links { display: flex; flex-direction: column; flex-shrink: 0; text-align: right; font-size: 13px; }
.about-links a { text-decoration: none; }
.about-content h2 { padding-top: 28px; border-top: 1px solid var(--yb-line); font-size: 20px; }
.about-content h2:first-child { border-top: 0; }

.resume-doc { padding: 45px 0 80px; overflow-wrap: break-word; word-break: keep-all; }
.resume-doc .header-row { display: flex; justify-content: space-between; align-items: start; gap: 30px; padding-bottom: 35px; border-bottom: 1px solid var(--yb-line); }
.resume-doc .header-left { display: flex; align-items: center; }
.resume-doc .name-row { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px; }
.resume-doc .name { margin: 0 0 8px; color: var(--yb-ink); font-size: 30px; letter-spacing: -.035em; }
.resume-doc .role-badge { color: var(--yb-muted); font-size: 14px; }
.resume-doc .tagline { color: #505760; font-size: 15px; line-height: 1.7; }
.resume-doc .contact-block { flex-shrink: 0; text-align: right; font-size: 13px; line-height: 1.9; }
.resume-doc .contact-block a, .resume-doc .experience-link { text-decoration: none; }
.resume-doc section { margin: 0 !important; padding: 32px 0 14px; border-bottom: 1px solid var(--yb-line); }
.resume-doc section:last-child { border-bottom: 0; }
.resume-doc .section-label { margin-bottom: 14px; color: var(--yb-ink); font-size: 20px; font-weight: 700; line-height: 1.4; }
.resume-doc .section-divider, .resume-doc .print-continuation { display: none; }
.resume-doc .summary-paragraphs p, .resume-doc .entry-desc, .resume-doc .bullets li { font-size: 16px; line-height: 1.78; }
.resume-doc .summary-paragraphs p { margin: 0 0 12px; }
.resume-doc .entry-block { margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--yb-line); }
.resume-doc .entry-block:last-child { border-bottom: 0; margin-bottom: 0; }
.resume-doc .entry-header { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 10px; }
.resume-doc .entry-title { margin: 0; color: var(--yb-ink); font-size: 19px; line-height: 1.45; }
.resume-doc .entry-subtitle { color: var(--yb-muted); font-size: 14px; font-weight: 500; }
.resume-doc .entry-period, .resume-doc .fact-date { color: var(--yb-muted); font-size: 13px; white-space: nowrap; }
.resume-doc .entry-desc { margin: 0 0 12px; }
.resume-doc .tech-line { margin-bottom: 16px; padding: 11px 14px; border-radius: 6px; background: #f8f9fa; font-size: 13px; line-height: 1.7; }
.resume-doc .bullets { margin: 0; padding-left: 21px; }
.resume-doc .bullets li { margin: 0 0 10px; }
.resume-doc .bullets li::marker { color: var(--yb-muted); }
.resume-doc .experience-references { font-size: 13px; }
.resume-doc .sub-title { margin: 0; font-size: 16px; }
.resume-doc .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.resume-doc .fact-row { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 12px; font-size: 14px; }

@media (max-width: 720px) {
  .site-header { gap: 10px; flex-wrap: wrap; }
  .site-nav { gap: 20px; }
  .home-intro { padding: 52px 0 12px; }
  .home-section { padding-top: 32px; }
  .article-grid, .article-grid.has-toc { grid-template-columns: 1fr; gap: 30px; padding: 36px 0 60px; }
  .toc { position: static; max-height: none; overflow: visible; margin: 0 0 28px; border: 1px solid var(--yb-line); border-radius: var(--yb-radius); padding: 12px 16px; }
  .toc summary { margin-bottom: 0; }
  .toc details[open] summary { margin-bottom: 14px; }
  .toc a:last-child { margin-bottom: 0; }
  .search-controls { flex-wrap: wrap; gap: 12px; }
  .search-field { flex-basis: 100%; }
  .topic-field { flex: 1; width: auto; min-width: 0; }
  .about-heading { flex-direction: column; gap: 15px; }
  .about-links { flex-direction: row; gap: 17px; text-align: left; }
  .resume-doc .header-row, .resume-doc .entry-header { flex-direction: column; align-items: start; gap: 6px; }
  .resume-doc .contact-block { text-align: left; }
  .resume-doc .two-col { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 480px) {
  .site-container { width: min(calc(100% - 36px), var(--yb-content-width)); }
  .site-header { padding-block: 17px; }
  .selected-row h3 { font-size: 18px; }
  .selected-main, .post-row-main { gap: 12px; }
  .post-row-main.has-thumbnail { grid-template-columns: 96px minmax(0, 1fr); }
  .selected-main.has-thumbnail { grid-template-columns: 96px minmax(0, 1fr) 24px; }
  .post-thumbnail { width: 96px; height: 68px; }
  .post-thumbnail.is-favicon img { width: 36px; height: 36px; }
  #all-posts .post-row-main.has-thumbnail { grid-template-columns: 112px minmax(0, 1fr); }
  #all-posts .post-row-main { align-items: start; }
  #all-posts .post-thumbnail { width: 112px; height: 80px; }
  .post-row { grid-template-columns: 1fr; gap: 5px; }
  .post-row time { grid-row: 1; }
  .article-body table { min-width: 550px; }
  .resume-doc .fact-row { flex-direction: column; gap: 2px; }
}